How to Debug the Expansion Valve of Low Temperature Freezer?

The effective operation of low temperature freezer is relevant to the needed refrigerating effect. It is crucial to correct expansion valve if better cooling effect is wanted. So, how to debug the expansion valve of low temperature freezer?

During the operation of low temperature freezer, the smaller the opening is, the less the volume of fluid transmission and pressure are,and vice versa. Based on the thermodynamic property of refrigerating fluid, the corresponding temperature varies as the pressure differs. The pressure raises, so does the temperature.

Therefore, if the pressure of the expansion valve of low temperature freezer is too small, the evaporating pressure and temperature will be too low. However, the speed of evaporation, volumetric refrigeration capacities and cooling efficiency will reduce because the flow of evaporator decreases and the pressure declines.

Conversely, the outlet of the expansion valve of low temperature freezer has excess process pressure, the evaporating pressure and temperature will also be too high. And the flow and pressure entering the evaporator of low temperature freezer rise. The compressor functions abnormally because damp gas (even the liquid) caused by excessive liquid evaporation is absorbed by compressor to produce wet stroke, bring about a series of severe conditions and even the damage o compressor. So with that being said, the opening level of the expansion valve of low temperature freezer should be regulated according to the temperature of the low temperature freezer of the day, which means as per related pressure.

The inlet pressure of low temperature freezer goes with higher evaporating pressure generally due to the pressure loss of air suction pipe and degree of superheat ( it depends on the length of pipeline and thermal barrier effect). At that time, the regulate pressure should be similar to the evaporation pressure ( the latter one will be a little higher). The regulation of the expansion valve of low temperature freezer should proceed carefully and patiently. The modulating pressure must pass the ebullition of heat exchange produced by the evaporator and the temperature of low temperature freezer before going into the intake cavity of compressor through pipelines to reflect on the pressure gauge, which takes time.

Guanya Refrigeration Technology Co., Ltd in Wuxi reminds that it takes 10 to 15 minutes every time for the regulation of the expansion valve of low temperature freezer to stabilize the pressure on the inlet pressure gauge. It should act with undue haste. The inlet pressure is a major parameter-basis for the compressor of low temperature freezer. The technical characteristics of the expansion valve of low temperature freezer influence the normal regulating operation straightway.

It is essential to tackle in time when faults like blocking and ice block happen in case that they affect the use of low temperature freezer. The low temperature freezer price from LNEYA is really reasonable. Come and contact us.

Daily Maintenance of Low Temperature Freezer

Low temperature freezer, which is also called industrial refrigerator, is mainly used for industrial cold treatment, the increase of wear-resisting property and friction of metals. Guanya Refrigeration Technology Co., Ltd in Wuxi is a leading role in the national Low Temperature Freezer Ranking List and its professionals make a conclusion about the related routine maintenance particularly. Also low temperature freezer price is the keypoint of its quality.

Every specialist is responsible for corresponding low temperature freezer in the industry, thus other personnel without the permission of operators will be not allowed to use the equipment. To ensure the time of duration for opening of low temperature freezer should not be over 5 minutes with more than 20-minute interval. It is suggest from Low Temperature Freezer Ranking List that a detailed record ought to be done about the opening and closing time as well as the exceptional situations. When abnormal conditions occur, equipment control sections should be reported with a record.

Low temperature freezer applies the artificial method for frost removal, and automatic cycle of freezing and thawing will degrade the biological samples. If the low temperature freezer of LNEYA in Wuxi of Low-Temperature Ranking Freezer List has worked for 24 months, it has to be killing frost once. Of course, the manager can decide whether the time should be earlier or not according to the physical truth, but every 24-month interval should be carried on at most. Before defrosting, enough dry ice ought to be prepared well. When the samples are taken out from freezer, they should be put into dry ice quickly and covered with a certain number of them. Then, a next step is to transfer them to the storage device in reserve.

Low Temperature Freezer Ranking List advises that the power supply of freezer should be turned off when all samples are settled down and open the door of freezer so as to melt the frosted ice gradually. It is banned to use metal tools to remove rime ice of in wall of freezer forcibly in case of the damage to the box. After the rime ice melt completely, to use a clean duster cloth to dry the residual moisture content inside, then to open the door for 1 to 2 hours, finally to close the door and power up.

After the completion of low temperature freezer and before the restocking of samples, the low temperature freezer should operate above 16 hours in order that the in-wall temperature of box can be down to target temperature and reach equilibrium states. After the defrosting finishes, the samples will be transferred back to the equipment based on the original storage location.

Numerous brands are in the Low Temperature Freezer Ranking List, which is important for buyers to be cautious. Generally, all of them can lengthen the service life of wear-out part directly, generally apply for thermal contraction of copper bush and bearing , and extensively use for sophisticated mechanized equipment .

The Introductions of the Ultra Low Temperature Recirculating Chillers

The performances of ultra low temperature recirculating chillers are different because of their different compressors. Compared with piston compressor, the structure of screw-type compressor tends to be more precise, so when users need to select ultra low temperature recirculating chillers, they should understand the cooling operation.

When working, the ultra low temperature recirculating chillers’ screw-type compressor will spray lubricant into the working chamber, functioning as lubrication, cooling, sealing, soundproofing, lubricating for main bearing , thrust bearing and shaft seal, a push for pressure oil of oil piston and balance piston. These oils will mix with high pressure gas to be expelled from compressor.  

Suction strainer: the ultra low temperature recirculating chillers’ suction strainer is comprised of shell and metal filter mesh. The shell is installed with suction thermometer, pressure gauge and priming valve, among which priming valve is the oil position for unit operation that needs paying attention to.

Oil cooler: the lubricating oil isolated from the engine oil of ultra low temperature recirculating chiller leads to the temperature rising ( close to exhaust heat temperature) for it absorbs friction heat and the heat of air. The oil temperature is so high that viscosity decreases, weakening the sealing function, increasing internal leakage and lowering the efficiency of compressor. Thus, it is necessary for lubricant to go through cooling for purpose of reuse. The oil cooler of ultra low temperature recirculating chiller is definitely for cooing the oil.

Coarse oil filter: in order to ensure the working of oil pump of ultra low temperature recirculating chillers, the lubricating oil should be purified through coarse oil filter before entering the oil pump.The later cleanliness of coarse oil filter should be checked for the first operation of the machines. And overhauling the filter mesh regularly should be on the basis of the system cleanliness. Gas or kerosene can be applied to clean the filter mesh, and get them clean with dry air for continuous use.

Oil- pressure adjusting valve: the ultra low temperature recirculating chillers’ oil-pressure adjusting valve is to regulate the injection pressure of compressor. If the ingoing oil pressure of compressor is excessive, the fuel-injection quantity will be overmuch, not only influencing the air removal of compressor but wasting work of it as well as increasing the possibility of shaft tunnel oil leakage of ultra low temperature recirculating chillers. Otherwise, the fuel-injection quantity will be too small, degrading the function of lubricant.

Oil separator: the oil separator of ultra low temperature recirculating chillers’ compressor unit is divided into vertical type and horizontal type. The interior of oil contains three chambers. The one next to the staving of compressor is for keeping the oil level, whose external shell is placed two sight glasses at top and bottom to observe the height of oil (automatic unit has oil level controller). That near the staving of electrical machinery is for installing the highly efficient filter element to separate the quadric oil, whose outboard also has a sight glass so as to decide whether to return oil or not based on the oil level.

The ultra low temperature recirculating chillers'screw-type compressor is quite complicated, thus it is good to have some relevant knowledge of its cooling and accessories when buying.

Leakage Detection Tips of Low Temperature Freezer

Pressure leaking detection

It is an effective way to check and find out the leakage point. The leakage detecting pressure of refrigerating system of freezer is relevant to the type of refrigerating fluid and cooling and the location of tube. The leakage detecting pressure of high-pressure system is 1.25 times greater than designing condensing pressure, while that of the low-pressure system is near 1.2 times higher than saturation pressure in condition of the temperature in summer. With it, refrigerating plant can stop from leakage no matter it is working or parking. Some cooling system should be detected according to the provisions of the pressure if there is a predefined acceptance or leakage detection standard. Obviously, the leakage detecting pressure can not be raised casually, otherwise it is likely to destroy the equipment, resulting in an accident.

Bubble test

It is a widely used detecting method at present , especially for those medium and large freezer systems that take advantage of it to search for the leak point. Generally, bubble test is comprised of soap or soap powder. The solution of soapy water should not be too ropy; if not, the viscosity will be too big to flow, worsening the sensitiveness of the test. But as an editor of Whose Low Temperature Freezer Is Best，i would like to tell you that the modulation not ought to be too dilute, or else the fluidity will be too large to be adhere to the surface of the equipment, being hard to form the bubbles. The soapy water can be applied the leaky point with hairbrush directly to observe whether this position is blistering. When it comes to the positions that are difficult to observe straightway, mirror reflection and flashlight can be used. After the test, the soapy water should be dried up in case of corrosion.

LNEYA have more freezers for sale and low temperature freezer price is really affordable.

Suitable Freezer Manufacturer

For enterprise users, choosing a suitable freezer manufacturer is very important and must be carefully treated. Wuxi Guanya Refrigeration technology co., Ltd, as a professional freezer manufacturer, is committed to producing all kinds of low temperature and ultra low-temperature refrigeration equipment, innovating, researching and developing continuously to meet the needs of the public. Cold plate freezer for sale now!

The professional freezer manufacturer has a team of high-quality professional designers with rich experience in the development of ultra-low temperature and high temperature. It takes the market and user needs as the guidance, takes science and technology as the center, applies international advanced technology, constantly brings forth something new from the old, follows the pace of the market, and meets the market demand.

Professional freezer manufacturers have great strength, LNEYA has one-step production chains, it strictly conforms to ISO9001-2008 international quality certification requirements standardized management from the product design, the component purchase, the screening, the production process to the packaging transportation, striving for product excellence, reasonable price, and satisfactory service.

Wuxi freezer manufacturer, LNEYA, according to the national conditions, researches and develops and produces cold plate freezer for sale of various specifications that adapts to the characteristics of domestic users and environment. The performance characteristics of LNEYA freezers are in an advanced position in China, their rigid indexes are basically synchronized with the international standard. Besides, the product also has a unique style and high-cost performance.

1. Electronic lock function. The door only opens when the password is authorized, the equipment can allocate 6 sets of authorization, each set has an independent password and username, the freezer manufacturer ensures that the open-door personnel and the open-door time can be recorded every time.

2. It adopts automatic control technology, high precision computer temperature control system, and PT-100 temperature sensor. The body temperature can be set freely within the range of -20 ℃ to -150℃. Equipped with mechanical lock holes, high and low voltage protection and high and low voltage displays, the running state is clear at a glance.

3. Equipped with a variety of fault alarm, over-temperature alarm, sensor alarm, high voltage alarm, compressor overheating alarm and open delay protection, all parts can be grounded safely, which makes the operation more safe and reliable.

4. The products have excellent performances, complete varieties, reasonable price and a one-year warranty, they can be customized according to customer needs. We have 24-hour service guarantee system, and welcome your negotiation.

Professional freezer manufacturers must have the strength to guarantee, and only the freezer manufacturers of great strength can provide a more comprehensive and complete service system.

Tips for Leakage Detection of Low Temperature Freezer

Soaking leakage detection

The sensibility of soaking leakage detection is higher than bubble test,which is usually applied for small Freon freezer unit. When using it, the equipment prohibited from contacting water in the system should be discharged, like all kinds of relays and electrical control device. Taking advantage of warm water during the bubble test, because its surface tension is smaller than cold water, forming bubbles more easily. As an editor of Low Temperature Freezer, I want to tell you that the leakage point will be discovered simply if accompanied by intense light source. After the completion of soaking leakage detection, the surface ought to be dried with compressed air, preventing the metal from corrosion.

Halide torch and its leakage detection

These are the specialized devices for detecting the Freon freezer unit system. When Freon refrigerating fluid encounters hot cooper parts, different colored flames will be casted for F2, C12 and Br contain the elements of halogen, helping find out the leaking point.

Vacuum leak test

When freezer unit system passes the pressure leakage detection, it should also go through the vacuum leak test since some pasts exist one-way leaker. Only pressure and vacuum leakage detection both conform to the standard can the leakproofness of cooling system can be ensured. Besides, the system is evacuated, so can water at the same time , esped dcially the Freon system. Therefore, evacuation and desiccation play essential roles in debugging the unit.

Should the uses for low temperature freezer be understood, the users will have a better try! Visit LNEYA to know more about low temperature freezer price.

Maintenance of Top 10 Industrial Freezers

When we choose and buy industrial freezers of top 10 brands, in addition to some necessary needs, we should also pay attention to the use and maintenance of the industrial freezer, we should select industrial freezers with long service life, high safety, and high efficiency.

In order to bring correct maintenance of the top 10 industrial freezers to the enterprises, LNEYA, an enterprise has many-year experience in industrial freezer refrigeration, summarizes a number of characteristics of cold plate freezer for sale and puts forward a series of maintenance standards.

Of course, the operating environment of top 10 industrial freezers is very important, to keep the exterior of the industrial freezer clean and ventilated, we should keep the industrial freezer being placed stably and horizontally, with no sundries around.

Industrial freezers are recommended to be maintained by a professional staff, setting a certain password in the operating interface to avoid unnecessary effects caused by the wrong operation of irrelevant personnel. In the daily maintenance, the anti-ash nets of the top 10 industrial freezers are recommended to be cleaned up every month so as to maintain good refrigeration effect and longtime low-temperature effect. Because the air-cooled condenser of the industrial freezer is more easily stained with a certain ash layer, regular cleaning is very important.

In the use of top 10 industrial freezers, as far as possible to reduce the frequency of door opening, take out the needed stuff as soon as possible. If the icy inside the industrial freezer is a lot, try not to use the sharp objects to eliminate the icy.

The top 10 industrial freezers cannot be used as a quick-freeze freezer, try not to place normal temperature items exceeding 1/4 the volume of the industrial freezer, if the things need to be placed are a lot, try to place them in accordance with the batch, thus achieving the cooling effect.

Wuxi Guanya Refrigeration technology co., Ltd is a reliable chiller manufacturer, offering cold plate freezer for sale with different types.

Buying Tips of Ultra Low Temperature Freezer

As for the industrial refrigerating treatment, the ultra low temperature freezer is indispensable. Let me tell you something about it!

The ultra low temperature freezer of Wuxi Guanya Refrigeration technology co., Ltd is mainly used in industrial refrigerating treatment. It can precipitate the uniform, fine and dispersed carbide produced in the matrix of metal structures. The precipitation of this carbide will greatly improve the wear resistance, hardness and friction properties of the metal, which can directly prolong the service life of the wear parts. It is an ideal substitute for liquid nitrogen. It can be used in the copper sleeve, bearing,  precision machinery and equipment. It is mainly used in large equipment such as automobile, large engineering machinery, aircraft components, space equipment components, military equipment parts ultra low temperature test, etc. Isn't it great?

Our ultra low temperature freezer / chamber can be used for degumming and disassembly. More importantly, as most of the cold processing equipment is customized, when purchasing our ultra low temperature freezer / chamber, please offer the load and the length and width of the inner tank.

Our ultra low temperature freezer price is very reasonable. Come and order now!

Good-Quality Liquid High&Low Temperature Impact Environment Chamber

When customers choose a liquid high and low-temperature impact environmental chamber for sale, first of all, they need to have a clear understanding of its use and characteristics.

Functions of liquid high and low-temperature impact environmental chambers:

The stirring convective liquid medium is used to replace the circulating air medium in the liquid high and low-temperature impact environmental chamber for heat transfer, which can meet the rigorous test requirements. The system structure can be divided into the high-temperature liquid tank (preheating area) and low-temperature liquid tank (precooling area). The environmental chambers simulate the transient environment between high temperature and low temperature by alternately placing the test samples into high and low-temperature liquid tanks through controlling the mechanical transmission parts.

The application industries of liquid high and low-temperature impact environmental chamber is a lot, so we must be careful when choosing the liquid high and low-temperature impact environmental chamber. Generally speaking, it is suitable for the simulation and evaluation of the adaptability of the aviation industry, national defense industry, automatic parts, auto parts, electronic and electrical instrument components, semiconductors and other related products and materials under the conditions of rapid change of ambient temperature so as to judge the reliability and stability of the products, providing evidence for the improvement of the quality and reliability of the products.

Characteristics of liquid high and low-temperature impact environmental chambers:

The inner high and low-temperature liquid tank adopts the forced mixing convection, and the high and low-temperature environmental chamber moves the test basket to the preheating and precooling tanks with round-trip impact. The liquid used in the high and low-temperature grooves of the liquid high and low-temperature impact environmental chamber is single same liquid, which reduces the cost of frequent change of the liquid. The liquid high and low-temperature impact environmental chamber uses the original LCD Chinese-English integrated color touchscreen master brain controller, it can be cooled by water or air cooling. The moving time of the high and low-temperature impact environmental chamber of Wuxi LNEYA is within 10 seconds.

When choosing a liquid high and low-temperature impact environmental chamber, first of all, we need to consider the quality of it, then choosing one of environmental chamber manufacturer with great strength.

Defrosting Method of Ultra Low Temperature Freezer

Defrosting method from the top 10 manufacturers of ultra low temperature freezer Wuxi Guanya = There are many manufacturers of ultra low temperature freezer, Wuxi Guanya is one of them. Many enterprise users don't know much about the defrosting after purchasing the ultra low temperature freezer. So Wuxi Guanya, a professional manufacturer, has specially arranged the relevant defrosting methods. 

When using ultra low temperature freezer, you need to realize that the thicker ice does not mean the better refrigeration effect. On the contrary, the thicker the ice, the lower the cooling effect will be. So how can we quickly defrost? The top ten manufacturers of ultra-low temperature freezer know that the freezer can be automatically defrosted by directly unplugging the power supply, but the speed is very slow. Now, Guanya will introduce two methods of rapid defrosting. 

Defrosting method from the top ten manufacturers of ultra low temperature freezer:

 It is more convenient to clean the ultra-low temperature freezer after melting it by an electric fan or a hairdryer. However, the hairdryer is generally not recommended. Because this temperature is not easy to grasp, it is likely to cause internal deformation due to high temperature, so it is worth the loss. However, the hairdryer is generally not recommended, because the temperature is not easy to control, the high temperature is likely to cause internal deformation, which will make the loss outweighs the gain. Use boiling water to melt ice. Of course, instead of pouring the boiling water directly onto the frost, but place it in a container, then close the door and melt the frost by slowly increasing the heat. If the top is not a metal evaporation plate, the container should be covered. The hot towel can be applied on the frost to make the ice layer fall off quickly, but the top ten manufacturers of ultra low temperature freezer remind that the shortcoming of this method is that it always needs hand support. The above three methods are mainly for the removal of the already formed frost. 

Defrosting method from the top ten manufacturers of ultra low temperature freezer:

Apply a layer of food oil around the ultra-low temperature freezer, so that the suction between the frost and the inner wall of the cabinet is much reduced. Then it is easier to remove the frost, but this method is generally not recommended by the top ten manufacturers of ultra low temperature freezer because It is never a good thing that the inner wall of the cabinet is always oily. Put a layer of plastic film on the inner wall of the ultra low temperature freezer, then you only need to remove the film when deicing. This method is effective, and the effect will be more obvious if better films are used. The films can also be used repeatedly. Of course, these are the defrosting methods that the top ten manufacturers of ultra-low temperature freezer arranged for enterprise users. Replacing in time and paying attention to cleaning up is recommended. Lneya has the best ultra low temperature freezer price.

Brand Tips of Ultra Low Temperature Freezer

When it comes to ultra low temperature freezer, a majority of people will get worried because ultra low temperature means the technology becomes more challenging. Compared with other refrigerant plants, the choices of ultra low temperature freezer are less. So, what brand of ultra low temperature freezer should we choose?

It is no doubt that the first choice is the ultra low temperature freezer made by Guanya Refrigeration Technology Co., Ltd. The reason why LNEYA in Wuxi is popular is that it has definite advantages. It applies microcomputer control, cascade temperature controller, digital display of temperature and the regulatory unit is 0.1 degree. The inside temperature ranges from 20 to 125 Degrees Celsius, which can perfectly meet the users’ requirement.

Secondly, the safety of ultra low temperature freezer is basically what people focus on. LNEYA has been striving to forge a safe and reliable experimental environment for users. The ultra low temperature freezer has multiple functions, including autognosis, overload protection of freezer, high-pressure press switch, overload replay, thermal protective device, fully ensuring the safety service and varied failure warnings ( over temperature alarm, high-pressure alarm, overheating of compressor alarm) which provides security for all of us to feel relieved to use.

The ultra low temperature freezer is primarily used in industrial cold treatment, promoting the elementary issues of the structure of metal to produce even, subtle and dispersive carbie precipitation which will improve the wear-resisting property and friction greatly as well as the increase of hardness and life service of wear-out parts directly. It is the ideal product for replacing liquid nitrogen, commonly being used in the thermal contractions of copper bush and bearing and extensively being applied in sophisticated machine assembling, large-scale equipment ( the ultra low temperature tests for cars, heavy-duty engineering machinery, the components of airplane, spaceflight instrumental units and military equipment units).

However, the dimensions are not fixed in many enterprises. Thus, LNEYA offers customized service to our consumers. A specific ultra low temperature freezer will be turned out only if loading capacity, inner dimension: length, width and height, and the time of full load reducing down to the target value.

When purchasing a ultra low temperature, branded products are needed. Not only should the quality be guaranteed but the after-sale services is also important. Some manufacturer sign the subcontracts with other companies about after service, without any service assurance.

It is believed that many users will determine to pick up an ultra low temperature after reading this article. The quality is as vital as after-sale services. The low temperature freezer price is reasonable. The users can be at ease because we have special after-sales teams.

Energy Conservation is Crucial for Developing Ultra Low Temperature Recirculating Chillers

With the continuous development of chemical, refrigeration and pharmaceutical industries, environmental pollution is put on the agenda earlier. As an editor of which is the industrial chiller, I can say that except for corresponding to the environmental protection theme, we apply environmental friendly ultra low temperature recirculating chillers for the equipment, increasing the efficiency constantly. So what should be done specifically?

Industrial chiller units lower the condensing temperature in the conditions of evaporating temperature, and increase the vaporization point and reduce the condensation temperature as much as possible when meeting the requirement of safety and manufacture, ensuring the cooling water efficiency and enlarging the change of cooling tower.

I should tell you that for the sake of ensuring the industrial chiller to operate safely, the power dissipation of a number of cold energies is smaller. It should consider the operating situations of the water pump and cooling tower comprehensively while taking this method into effect.

To prevent and reduce the pipe scaling of industrial chiller is for enhancing the heat transfer efficiency of the condenser and evaporator. If the make-up water is treated badly, calcium carbonate and magnesium carbonate produced by calcium bicarbonate and magnesium bicarbonate through heating will precipitate on the pipes, decreasing the heat-conducting property to have an impact on the heat exchange efficiency of condenser and evaporator and increase the electric charge by a large margin for chiller's operation. Apart from using water treatment technology, I will tell you that you can apply the equipment for cleaning the pipes regularly, which can save the electric quantity and at the same time level up cooling-water machine's effect.

When centrifugal refrigeration machine's compressor is adjusted by the frequency converter of industrial chiller units on account of revolving speed, the pressure will be raised as low-tension refrigerant goes through hydroextractor. The faster the rotational speed is, the higher the pressure is. In actual operation, the equipment works without a full load. The centrifugal machine with fixed revolving speed operating in small load will waste the energy. While frequency converter of the refrigerator will regulate the speed of compressor automatically according to the change of load, having greater potential for energy saving.

When mastering the four points mentioned above, I am sure the working efficiency will be improved better. It is necessary to follow these steps so as to protect the environment!

Contact LNEYA for more dynamic temperature control equipments.

Ranking List of High and Low Temperature Cooling Heating Alternating Test Chambers

When choosing the high and low temperature cooling heating alternating test chamber, the enterprise users must have a certain understanding of the ranking list of the high and low temperature cooling heating alternating test chambers on the market. They should know which brand has great strength, which factory is more reliable and which after-sale service is better.

The high and low temperature cooling heating alternating test chamber is suitable for testing the performance indicators of aerospace products, information electronic instruments and apparatus, materials, electricians, electronic products and various electronic components under high and low temperature or damp heat environment. Compared with the common high and low temperature cooling heating alternating test chamber on the market, the high and low temperature cooling heating alternating test chamber of Wuxi LNEYA has the following characteristics:

1. The high and low temperature cooling heating alternating test chamber has a wide range of temperature control, which can meet the various needs of users.

2. The high and low temperature cooling heating alternating test chamber adopts a unique balanced temperature regulating mode, which has a stable and balanced heating capacity. It can carry out high precision and high stability temperature control; the temperature is displayed with a touchscreen, which is easy to read.

3. The high and low temperature cooling heating alternating test chamber can meet the more accurate test conditions by adjusting the temperature error value.

4. The high and low temperature cooling heating alternating test chamber has the function of automatically selecting the refrigeration circuit to run with the setting value of temperature, and the operation is simple.

5. The box door is equipped with a large observation window. The test condition of the sample can be observed at any time.

6. The high and low temperature cooling heating alternating test chamber has the function of high-temperature opening. It can open the refrigerator automatically when the temperature of the box raises to 150 ℃ so that the test can be carried out continuously between the high temperature and the low temperature.

7. The high and low temperature cooling heating alternating test chamber of Wuxi LNEYA has various security guaranty functions of auto diagnosis, freezer overload protection, high-pressure switch, overload relay, heat protection device and so on, which fully guarantee the safety of use.

8. The high and low temperature cooling heating alternating test chamber adopts a multi-blade blower with strong air supply cycle to make the temperature in the test area evenly distributed.

9. It adopts the wind cycle design, the wind pressure and wind speed are consistent with the test standard, and the door-opening instantaneous temperature stabilization time is short.

10. The heating and cooling systems are completely independent, which can improve efficiency, reduce test cost, prolong service life, and reduce the failure rate.

11. The water supply tank is placed under the lower right part of the control box, it has automatic water shortage protection, which is more convenient for the operator to replenish the water.

12. The humidifying system pipeline is separated from the control circuit board, which can help avoid failure caused by water leakage in the humidifying pipeline and improve safety.

13. The waterway circuit system adopts door opening, which is convenient for maintenance and overhaul.

14. In the refrigeration system, the condensation adopts air cooling.

Of course, when selecting the low temperature test chamber, the explosion-proof system can be customized if needed.

Contact LNEYA for more dynamic temperature control equipments.

Price Analysis of High Low Temperature Test Chambers

As the saying goes, “ You get what you’ve paid. ” The price of the high low temperature test chamber is related to the quality of its configuration. The technology of Wuxi LNEYA itself is priceless. In the test chamber industry, the high low temperature test chamber is sold quite well.

First of all, from the product itself, the high low temperature test chamber adopts a unique balanced temperature regulating mode, which has a stable and balanced heating capacity. It can carry out high precision and high stability temperature control, the temperature is displayed with a touchscreen, which is easy to read. It has the function of automatically selecting the refrigeration circuit to run with the setting value of temperature, and the operation is simple. The box door is equipped with a large observation window, and the test condition of the sample can be observed at any time. Moreover, it has the function of high-temperature opening, it can open the refrigerator automatically when the temperature of the box raises to 150 ℃ so that the test can be carried out continuously between the high temperature and the low temperature. The high low temperature test chambers with different prices have different power and energy storage equipment, and the cost of the equipment is also related to them.

Secondly, in terms of performance, the reason why the price of Wuxi LNEYA high low temperature test chamber is higher than that of ordinary equipment is that the controller uses LNEYA PLC module, the program editor can edit 15 programs and each program can compile 45 steps, the touchscreen is LNEYA 7 inch color touchscreen, the data record is made in the form of temperature curve and alarm information(can be exported through U in the form of EXCEL), the communication adopts the RS485 interface Modbus RTU protocol, the compressor adopts the Emerson Valley wheel scroll flexible compressor, the French Tecumseh or Italy DORIN compressor, the drying filter adopts Danfoss or Emerson, the oil separator uses Emerson, the expansion valve adopts the Danfoss thermal expansion valve or the Emerson electronic expansion valve, all the components are of the international brands.

From the supply and demand of the market, the demand for the high low temperature test chamber is increasing while there are few manufacturers can overcome the technical difficulty of the new explosion-proof high low temperature test chamber, so the price is of the high low temperature test chamber high.

The above analyzes the reasons for the high price of the high low temperature test chamber from the aspects of cost, performance and market environment. It is believed that you now must have a clearer understanding of the high low temperature test chamber.

Contact LNEYA for more dynamic temperature control equipments.

How to Make Ultra Low Temperature Recirculating Chillers More Energy-saving

In modern times, environmental protection and energy saving is the development theme, so is the industrial chiller. Then, how to improve your industrial chiller to be more energy conservation? I, as an editor of Who Is The Best Manufactures of Industrial Chiller, will explore deeply, please come to join me!

First, to prevent and reduce the pipe scaling of industrial chiller is for enhancing the heat transfer efficiency of condenser and evaporator.

If the make-up water is treated badly, calcium carbonate and magnesium carbonate produced by calcium bicarbonate and magnesium bicarbonate through heating will precipitate on the pipes, decreasing the heat-conducting property to have an impact on the heat exchange efficiency of condenser and evaporator and increase the electric charge by a large margin for chiller's operation. Apart from using water treatment technology, i will tell you that you can apply the equipment for cleaning the pipes regularly, which can save the electric quantity and at the same time level up cooling-water machine’s effect.

Second, to adjust the operating load of industrial chiller reasonably.

By terms of ensuring the industrial chiller to operate safely, power dissipation of an amount of cold energies are smaller. It should consider the operating situations of water pump and cooling tower comprehensively while taking this method into effect.

Third, to lower condensing temperature of industrial chiller.

On the premise of meeting the requirement including the security of cooling-water machine and production demand, evaporating temperature should be raised and condensing temperature should be lowered as much as possible. Please allow me to have your attention that the cooling tower needs to make a big change so as to keep the efficiency.

Industrial chillers divide into many categories like screw chiller, air-cooled water chiller, water chiller and ultra low temperature recirculating chillers. I am pleased to claim that the energy conservation of chiller is realizable.

Contact LNEYA for more dynamic temperature control equipments.

Quotation of High Low Temperature Test Chamber

When users choose and purchase high low temperature test chambers, many manufacturers like Wuxi LNEYA will explain the price factors of the high low temperature test chamber. The price of high low temperature test chamber is relatively high, which is influenced by the configuration specification, quality, brand, appearance, etc.

High low temperature test chamber manufacturer quotation is very important to the users. The high low temperature test chamber is undoubtedly a fairly precise test chamber equipment, and its quality and process are the primary concerns when choosing. The good product can get the corresponding price, so what factors should be paid attention to by the users when purchasing high low temperature test chambers?

1.Good manufacturing. Wuxi LNEYA hires professional technicians to make the molding, and the appearance is quite good.

2. The materials or parts of the high low temperature test chamber are all carefully selected, the details are also processed to improve. We can provide a series of product guarantee for you.

3. The service quality of the after-sale personnel is also very important, no one wants to buy equipment produced by manufacturers with bad service.

Besides, it is also necessary to have a clear understanding of the performance of the high low temperature test chamber when the customers choose high low temperature test chambers. The core of the high low temperature test chamber is the refrigeration system and the control system. Generally speaking, the expensive high low temperature test chambers use compressors and touchscreen control systems of import brands such as Tecumseh, GEA, EMERSON, MITSUBISHI, embraco, etc., which can improve the comprehensive performance of the high low temperature test chamber, and also improve the brand grade of the high low temperature test chamber. Of course, the brand is also one of the factors affecting the price of high low temperature test chamber, and the quotation of manufacturers with great strength will be relatively high.

The quality of electronic components, locks, and casters are closely related to the price of the high low temperature test chamber. If the configuration of the high low temperature test chamber is of imported brands, there will be a huge difference between the quotation of different manufacturers of the high and low temperature test chamber. So, when purchasing a high low temperature test chamber, we must recognize the manufacturer's strength and the quality of the parts used in high low temperature test chambers, so that we can make the corresponding budget and buy the suitable product.

If conditions permit, customers can go to the high low temperature test chamber enterprises for on-site inspection.

Contact LNEYA for more dynamic temperature control equipments.

Failures of Heating Cooling Circulators

The heating cooling circulator can be used in many chemical pharmaceuticals and laboratories. Then, how to solve the failures of the heating cooling circulator?

Failure of circulating pump

The failure of the circulating pump is generally the heat overload of the circulating pump. There are 4 main reasons for this failure:

1. The external circulation pipeline is too long. It is suggested to shorten the external circulation pipeline, reduce the bending of the external circulation pipeline, and then click the Reset button of the electric cabinet surface heat relay;

2. The circulating pipe is blocked. It is suggested to check the degree of cleanliness of the circulating pipe, install a filter, and then click the Reset button of the electric cabinet heat relay;

3. The circulation pump voltage is too low. It is suggested to measure whether the circulation pump voltage is in line with the prescribed range, improve the voltage environment, and then click the Reset button of the electric cabinet heat relay;

4. The regulating current of the heat relay is too small. It is suggested to measure the pump current, compare the heat relay range, turn up the heat relay current properly with the cross screwdriver, and then click the Reset button of the electric cabinet heat relay.

Failure of sensor

The great possibility of sensor failure is the wiring error. At this time, check the wiring in time, and we should pay attention to two kinds of situations, one is the sensor is short-circuited or the temperature is < -160 ℃, the other is the sensor is open circuited or the temperature is > 349℃.

If the sensor is short-circuited or the temperature is <-160 ℃, it may be the fault of the sensor itself. At this time, change the sensor (there is a standby sensor in the equipment line slot), if the sensor connection is wrong, it is suggested to check the connection condition (the control circuit diagram) to correct.

If the sensor is open circuited or the temperature is > 349 ℃, it should be the fault of the sensor itself. At this time, replace the sensor in time (there is a standby sensor in the equipment line slot). It is necessary to pay attention to whether the temperature is too high and beyond the range. If the equipment is out of electricity, check the power supply of the equipment.

The above two failures of the heating cooling circulator are relatively simple. I believe that you can quickly solve these failures with these tips.

Contact LNEYA for more dynamic temperature control equipments.

Ultra Low Temp Freezer DW -120℃~-150℃

Product Description

Description: Ultra-low temperature freezer mainly used for scientific research, special materials of low-temperature test and preservation; freezing of red blood cells, white blood cells, skin, bacteria, semen, biological products, ocean products and electric, reasonable ultra low temperature freezer price.



Knowledge Center

As a cryogenic storage equipment, the cryogenic refrigerator is widely used in fields like medical and health, scientific research, disease control, and inspection, etc. Since the birth of China's first ultra-low temperature refrigerator in 2006, China's ultra low temperature refrigerator has developed rapidly through the development of more than ten years, especially the rise of the biologic sample library. Many native low-temperature refrigeration brands have entered the field of ultra-low temperature refrigerators. The brands in the market are quite a mixed bag, so here are two suggestions for you to choose cryogenic refrigerators from Guanya.

1. Selection for refrigeration mode: Double stage self-cascade refrigeration

The cooling mode is the core of the ultra-low-temperature refrigerator. Stability and long life are the most important. Double cascade refrigeration is a mature refrigeration mode recognized by the academic community. This refrigeration mode is adopted by almost all ultra-low-temperature brands at home and abroad. The two compressor high temperature and low-temperature respective division of labor, each operating under the best conditions, which makes the whole operation stable and extend the service life of the compressor.

2. Temperature uniformity: The simple numbers are not enough

Except the uniformity temperature number, we need to see the method of detection and whether it has the report of the Quality Inspection Center. The most stringent detection method is stationing 20 points in the box. The leading index of the industry is active about 7℃ at any point in a little box, which means that the range of variation is ±3.5 ℃. If the index beyond this, it is likely to be a registration test with only 4 test points and just take the average number of tests.

Contact LNEYA for more dynamic temperature control equipment.

Several Attention Aspects of Ultra Low Temperature Freezer

The performance of ultra low temperature freezer will be reduced naturally due to long-period application in all fields. Thus, Guanya Refrigeration Technology Co., Ltd, leader in ultra low temperature freezer manufacturers has to remind every user to maintain the freezer regularly. So what aspects should be paid attention to?

Because ultra low temperature freezer groups different categories, the maintenance should be varied, among which air-cooled freezer uses air as cooling medium. As the air contains dust within the environment where ultra low temperature freezer stays, some of dust will coagulate on the surface of the fins of freezer. As time goes by, it worsens the heat dissipation effect, especially in rather tough conditions. Therefore, periodical cleaning should be carried out.

The cleaning method of ultra low temperature freezer: using the instruments like compressor are able to clean the dust. If much more dirt is inside, detergent without any corrosive effect can clean heat radiating tube and fins, improving the heat dissipation effect.

As for ultra low temperature freezer, the foundation lays on the incrustation. The cleaning period is decided by water quality, which should be cleaned at least one year due to bad quality; otherwise, two or three years are acceptable. Small ultra low temperature freezer is equipped with extensive-type water cooling freezer can take advantage of acid.

The concrete operational method of ultra low temperature freezer is to demount the freezer, discharge the water, and infuse 10% dilute sulphuric acid solution into it until the solution flows out the water outlet. The dilute sulphuric solution can be discharged after 20 to 30-minute stop over the freezer, and you should repeat this process twice or three times. After that, the connecting pipe between cooling water tube and freezer should be installed. Open cooling water valve to wash for 10 to 20 minutes, and scale prevention and cleaning claim the end.

Of course, when purchasing ultra low temperature freezer, you should keep a watchful eye on the performance and brand of freezer, ensuring a branded one is chosen for better use. Naturally, regular maintenance is required.

Contact LNEYA for more info.

Plate Freezer

Product Description

Information: Refrigeration system high and low-pressure protection and display; Condensing temperature display and protection; A variety of fault alarm (over-temperature alarm, sensor alarm, high-pressure alarm, compressor overheating alarm;) Boot time delay. Cold plate freezer for sale is in high quality.



Contact LNEYA for more dynamic temperature control equipment.

Ultra Low Temp Freezer DW -120℃~-150℃

Product Description

Description: Ultra-low temperature freezer mainly used for scientific research, special materials of low-temperature test and preservation; freezing of red blood cells, white blood cells, skin, bacteria, semen, biological products, ocean products and electric, reasonable ultra low temperature freezer price.

Knowledge Center

As a cryogenic storage equipment, the cryogenic refrigerator is widely used in fields like medical and health, scientific research, disease control, and inspection, etc. Since the birth of China's first ultra-low temperature refrigerator in 2006, China's ultra low temperature refrigerator has developed rapidly through the development of more than ten years, especially the rise of the biologic sample library. Many native low-temperature refrigeration brands have entered the field of ultra-low temperature refrigerators. The brands in the market are quite a mixed bag, so here are two suggestions for you to choose cryogenic refrigerators from Guanya.

1. Selection for refrigeration mode: Double stage self-cascade refrigeration

The cooling mode is the core of the ultra-low-temperature refrigerator. Stability and long life are the most important. Double cascade refrigeration is a mature refrigeration mode recognized by the academic community. This refrigeration mode is adopted by almost all ultra-low-temperature brands at home and abroad. The two compressor high temperature and low-temperature respective division of labor, each operating under the best conditions, which makes the whole operation stable and extend the service life of the compressor.

2. Temperature uniformity: The simple numbers are not enough

Except the uniformity temperature number, we need to see the method of detection and whether it has the report of the Quality Inspection Center. The most stringent detection method is stationing 20 points in the box. The leading index of the industry is active about 7℃ at any point in a little box, which means that the range of variation is ±3.5 ℃. If the index beyond this, it is likely to be a registration test with only 4 test points and just take the average number of tests.

Contact LNEYA for more dynamic temperature control equipment.

Precision Chiller

Product Description


System Introduce

Typical Applications:

Semiconductor Manufacturing Device Cooling:

Single chip cleaning, printing machine, automatic clamp installation equipment, spraying equipment, ion plating equipment, etching device, single-chip processing device, slicing machine, packaging machine, the temperature of the developer management, exposure device, magnetic part of the heating device, etc.

Laser Equipment Cooling:

Laser processing, heating part of the welding machine, laser marking device, chemical reaction plant, carbon dioxide laser processing machine, etc.

Other Industries Cooling:

Plasma welding, automatic packaging machine, mold cooling, washing machine, gold-plated groove, resin molding machine, precision grinding machine, injection molding machine of molding parts, etc.

Analysis Of Testing Machine Cooling:

Electronic microscope, ICP lighting light source part of the spectrum analysis device, heating part of the spectrophotometer, X-ray analytical device of heat source, automatic pulse heating part of the banner, the light source of atomic absorption spectrophotometer, etc.

Features of precision chiller:

1. The temperature of heat transfer fluid can be adjustable.

2. Adopt ASPERA,DANFOSS,MANEUROP,COPELAND etc. Brand compressor, stable performance and can work continuously.

3. Human design, more convenient and flexible.

4. Microcomputer temperature controller, temperature figures display, the adjustable unit is 0.1℃, the temperature range is 7℃~30℃.

5. Use hot gas bypass, save energy and improve the control precision.

6. A variety of fault alarm (overtemperature alarm, high pressure alarm, sensor alarm, compressor overheat alarm)

7. Power on delay protection.

8. All parts are safety grounding.

9. High-performance circulating pump can guarantee 24 hours continuously running a day.

Technical Parameter



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High-Low Temp. Test Chamber

Product Description

Performance characteristics of low temperature test chamber：

1. In the refrigeration system, the condensation adopts air cooling mode, which has a wide temperature control range, which can meet the user's various needs.

2. With a unique balanced temperature control method, with stable and balanced heating capacity, high precision and high stable temperature control can be carried out;The temperature is displayed by touch screen, easy to read, precise and convenient.

3. Adjust the temperature error value to meet more accurate test conditions.With the setting of temperature, it is easy to operate the refrigeration circuit.

4. The box door is equipped with a large observation window, which can observe the test status of the test sample at any time.

5. with functions of high temperature on, can open the refrigerator when the temperature in the oven to 150 ℃, facilitate continuous round-trip experiment was carried out between the high temperature and low temperature.

6. Self-diagnosis function, overload protection of refrigerator, high pressure switch, overload relay, thermal protection device, etc., to ensure the safety of use.

7. Use the multi-wing fan to supply the wind with strong air circulation and avoid any dead Angle, so that the temperature can be evenly distributed in the test area.

8. Wind circulation is designed with wind return wind. The wind pressure and wind speed are in accordance with the test standard.

9. Temperature rise, cooling and system complete independence can improve efficiency, reduce test cost, increase life span and reduce failure rate.

Technical Parameters：



Contact LNEYA for more dynamic temperature control equipment.

Heating Cooling Circulator UC 50℃～300℃

Product Description

Heating Circulator UC series with function from high temperature to cooling process, from 300℃~50℃.

Equipped with heating cooling container, with large heat transfer area, fast heat-up and cool-down, small heat transfer oil demand.

the heating cooling circulator Can heat-up and cool-down continuously.

The whole cycle is full closed,there is no oil mist at high temperature, heat transfer oil can not be oxidized and browning.

With function of internal PT100 for correcting internal circulation.

The whole system is closed with expansion tank, the expansion tank and liquid circulation are thermal insulation, do not participate in liquid circulation, regardless of high or low temperature, the medium in expansion tank is limited to 60℃..

50℃～300℃

Technical Parameters of Dynamic Temp. Control System:



Knowledge Center

The characteristics of Heating and Cooling Circulator

The entire liquid circulation of Heating cooling cycle (50℃~300℃ ) is airtight, with expansion containers. No matter the temperature of the liquid circulation is high-temperature or the temperature of the media in the low-temperature expansion containers lower than 60℃, the expansion containers and liquid circulation is adiabatic, not involved in the liquid cycle, but the mechanical connection.

The whole liquid circulation is a closed system, no water vapor absorption at low temperature, no oil mist at high temperature, for the heat conduction oil has a wide range of working temperature. There are no mechanical and electronic valves in the whole circulatory system.

Wide range of operating temperature with heating refrigeration function. The maximum temperature range is between -50℃~250℃.

The controller with 2 LED displays can display both the temperature setting and the actual value, as well as the over-temperature alarm value. It has the features of efficiency and fastness, and also easy to fill the liquid. To ensure the rapid cooling at high temperature, it can continuously control the temperature at 250℃ to -50℃.

The circulation management is completely closed, without oil mist and water absorption, which ensures the safety of experiment and the life of heat conducting liquid. The refrigeration adopts the American Goulen compressor and circulating pump, stable and reliable.

It has the function of self-diagnosis, overload protection of chiller, high pressure switch, overload relay, thermal protection device and so on. The temperature of heat conduction medium is controlled and the whole cooling process adopts the same heat conduction medium. The high-lift pump meets the needs of the long-distance transmission of heat conduction medium.

Contact LNEYA for more dynamic temperature control equipment.

Plate Freezer

Product Description

Information: Refrigeration system high and low-pressure protection and display; Condensing temperature display and protection; A variety of fault alarm (over-temperature alarm, sensor alarm, high-pressure alarm, compressor overheating alarm;) Boot time delay. Cold plate freezer for sale is in high quality.



Contact LNEYA for more dynamic temperature control equipment.

Plate Freezer

Product Description

Information: Refrigeration system high and low-pressure protection and display; Condensing temperature display and protection; A variety of fault alarm (over-temperature alarm, sensor alarm, high-pressure alarm, compressor overheating alarm;) Boot time delay. Cold plate freezer for sale is in high quality.



Contact LNEYA for more dynamic temperature control equipment.