The cooling water machine (the chiller, also known as the chiller) is an air-cooled water circulation device that does not require a cold water tower. It is a compressor-cooled design that is designed for machines, scientific instruments, or production processes that require cooling water. Compared with the traditional cooling method, the machine has several advantages: 1. Saving water source; 2. It can improve the production capacity of cooling equipment and instruments, prolong life and improve product quality; 3. Anti-corrosion design can prevent cooling water length The time loop blocks the pipeline.The cooling circulating water machine is a cooling liquid (the common cooling liquid is water, the low temperature commonly used synthetic cooling liquid, such as an aqueous solution of ethylene glycol, etc., hereinafter referred to as cooling liquid or simply "water") as the heat transfer medium, and other instruments that need to be cooled. Or the heat generated by the equipment is transmitted, and the heat is dissipated to the outside of the equipment through the refrigeration system to ensure that the equipment works within the normal temperature range. Between the device and the instrument and equipment, the pressure of the pump in the device is used to form a closed medium circulation, and the temperature of the medium is detected by the temperature sensor to control the refrigerator.
The main application areas are as follows:Plastic industry: used for plastic processing machinery mold cooling, can greatly improve the surface finish of plastic products, reduce the surface marks and internal stress of plastic products.Electronics industry: Stabilize the molecular structure inside the production line of electronic components and improve the pass rate of electronic components;Electroplating industry: control plating temperature, increase the density and smoothness of plating parts, shorten plating cycle, improve production efficiency and improve product quality;Machinery industry: control the pressure oil temperature of the oil pressure system, stabilize the oil temperature and oil pressure, prolong the oil quality use time, improve the efficiency of mechanical lubrication and reduce wear;Vacuum coating: control the temperature of the vacuum coating machine to ensure the high quality of the plated parts;Chemical fiber industry: Freeze-drying air to ensure product quality;Pharmaceutical industry: mainly used for the control of temperature and humidity in the production workshop and the heat of reaction in the process of producing raw materials;Chemical industry: It is mainly used for cooling and cooling of chemical reactors (chemical heat exchangers), taking away the huge heat generated by chemical reactions in time to achieve the purpose of cooling (cooling), to improve product quality;Machine tool industry: used in CNC machine tools, coordinate boring machines, grinding machines, machining centers, combination machine tools and all kinds of precision machine tool spindle lubrication and hydraulic system transmission medium cooling, can accurately control oil temperature, effectively reduce the thermal deformation of machine tools, improve machine tools Processing accuracy.
There are various types of chillers, such as air-cooled chillers, water-cooled chillers, etc. But no matter what the chiller is, there are some factors that affect the cooling capacity of the chiller. 
A cooler is an energy-saving device that is cooled by air compression or refrigerant circulation. The following factors affect the cooling capacity of the chiller:1. Compressor power: The higher the power, the higher the cooling capacity. Depending on the size of the model, choose a different type of compressor. For example, a small chiller is a piston type, a large type is a spiral type, a centrifugal type, or the like.2. Water temperature (different evaporation temperature, different cooling capacity): The higher the water temperature, the greater the cooling capacity, the lower the water temperature, and the smaller the cooling capacity.3. Pump power: The amount of water circulation directly affects the heat transfer rate.The form of the evaporator and the condenser are divided into a water tank coil test, a shell tube type, a stainless steel plate type and the like.4. Heat transfer material: The copper tube has the best heat transfer effect.The above are factors that affect the cooling capacity of the chiller. If you have any questions about the chemical reactor cooling system, please feel free to contact LNEYA.COM/sales@cnzlj.com
A chiller is a water-cooled unit that uses water circulation to provide a constant temperature, constant flow and constant pressure cooling water. The LNEYA cold water system has its own working principle, that is, a certain amount of water is injected into the water tank of the machine, the cooling water is cooled by the refrigeration system, and then the cooling water is operated by the compressor. The cooling water is sent to the equipment to be cooled, the heat is taken away, then the temperature rises, and then flows back to the water tank to achieve a cooling effect. However, when using a chiller for a long time, there will usually be some dirt deposits in the chiller pipe or water tank. What is the reason below.1.Chemical processorIf a zinc salt or a phosphate inhibitor is added to the water circulation system, zinc or phosphate scale is formed. Therefore, we must always carry out maintenance work on the chiller, not only to ensure the cooling capacity, but also to extend the service life of the chiller.2. Process media leakageThe water cooler leaks, especially if it leaks oil or some organic matter causes deposits to form.3. AirSediments, dust, microorganisms and their spores enter the circulatory system with the air, and sometimes insects are carried into the system, causing the heat exchanger to clog. When the environment surrounding the cooling tower is contaminated, corrosive gases such as hydrogen sulfide, chlorine dioxide and ammonia will react in the unit and indirectly cause deposition.The LNEYA chiller cooler is a fully enclosed system that does not expose the media to outside air during use.It can be seen from the above that in the use, the chiller needs to be maintained at all times, which not only ensures the cooling capacity, but also prolongs the service life of the chiller and the saving of circulating water.If you need any information, you can contact LNEYA to inquire about the use of chiller coolers and other cooling system equipment at sales@cnzlj.com/LNEYA.COM.
Noise is common in the operation of industrial equipment. There are many reasons for noise, which may be caused by some environmental problems in the installation. When noise is generated, we must first confirm the cause and whether it is an internal component. The problem is raised because if a problem occurs and the replacement or repair is not stopped in time, the low temperature chiller will not work properly.The environment and location of the device can cause noise problems, and if it is in a relatively small environment, the noise will be "amplified". A smaller environment will make the normal operation sound louder and will sound out of normal operation. It is recommended that both air-cooled and water-cooled units be installed in a relatively open environment with no foreign objects around them. If the requirements are higher, the soundproof wall can be installed and ventilation and heat dissipation can be observed.There is no flatness processing under the device position, which will result in displacement during normal operation, as well as vibration and shaking during normal operation. Under displacement conditions, the amplitude of the vibration will increase and a large amount of noise will be generated.
Due to the operational noise caused by the low temperature chiller itself, air coolers and water coolers are more prone to "noise" than the latter due to structural differences. It is well known that air-cooled chillers are cooled by a fan for the condenser, while the water cooler is cooled by a cold water tower system for the condenser. Compared to the noise of the cold water tower (usually placed at a high position, it is different from the position of the water cooler). The fan is noisy and integrated with the chiller main unit, so it is easier to feel the noise (can remove the blades or fill the bearings with smooth oil).In addition, the compressor of a low temperature chiller is one of the sources of noise. The selected compressor can have low noise characteristics and the chiller noise must be low. Otherwise, the overall chiller will be noisy.In addition to the noise figures of the chillers used in low-temperature chillers, whether it can be operated continuously for a long time, whether to add appropriate smooth oil, whether it can be regularly maintained, and whether the service life is too long is the key to balancing the noise elements of low-temperature chillers. Where. In addition, there are pumps for both air and water cooling. If the pump is running too loud, it may need to be cleaned.Then, as an important part of the low temperature chillers, in order to reduce losses and generate noise, we should always maintain to extend its service life and improve operational efficiency:1. Check if the oil level of the fuselage and oiler is normal.2. Check the movement flexibility of the oiler and the amount of oil injected3. Check the oil leakage, water leakage and air leakage of the compactor and take corresponding measures to remove it.4. Check that each valve is open.5. Check that the vibration of the machine is normal. Otherwise, it is necessary to stop the inspection and scanning.6. Check that the value of each meter is normal.7. Check the smooth oil process (fine) filter and replace the fine filter according to the conditions. Stop cleaning the strainer.If you have any knowledge of the use, maintenance, equipment prices, etc. of cryogenic chillers, please contact LNEYA and discuss: sales@cnzlj.com/LNEYA.COM.
If there is a high temperature difference between the inlet and outlet water, then a large external tank will be used to store cold water. In this case, the cooling water will not be directly from the cooler application. Deep into the outside of the tank is a "temperature buffer sort behavior". Cold water tanks are much larger than internal ones. The cold water goes to the application of external fuel tank and come back as hot water. It can be traced back to external fuel tanks, not to industrial chillers.Industrial chillers recycle is at constant temperature and pressure to increase stability and repeatability of water cooling equipment and instrument cleaners and conditions or clean water. Angle use and back of application of cooling of water flow.
An uncommon open-loop controlled industrial refrigerator is an open tank or oil pan at which the temperature of the liquid is continuously circulating. The liquid comes from the tank and goes back to the tank through the pump crew. It is an adjustable constant temperature sensory liquid temperature and circulation cooler to maintain constant temperature tank.One of the new developments in industrial chillers is air cooling, not the use of cooling water. In this case, the condenser of industrial water chiller does not have cooling and hot air refrigerant, but uses cooling water. This development allows for more than 15% reduction in energy demand in coolers due to the small area of surface water. In addition, the noise level can be greatly reduced with the permission of the fans.Most industrial chillers use cooling media for refrigeration, but some simple technologies that rely on air or water include cooling coil flow that regulates temperature. Water is a commonly used coolant in refrigeration process, although cooling mixtures (mainly with coolant additives to enhance cooling water) are often used.
Different industries have different temperature requirements for cryogenic cryostats. Of course, there are many types of cryogenic cryostats. The refrigeration methods used in different industries are different. LNEYA uses compressor refrigeration to achieve refrigeration. The effect is similar to or better than liquid nitrogen cryogenic cryostat.However, there are still customers who use liquid nitrogen cryogenic cryostats, and customers who encounter power failures when they encounter them do not know how to solve them.One is the frequent power outage. If the power is cut off frequently, then there will be some damage in the next time the liquid nitrogen cryogenic cold box is started. The compressor is out of the working state, then the compressor will be on the compressor. There is damage. If the power outage is not used for a long time, it is also easy to cause the pipeline inside the liquid nitrogen cryogenic cold box to be damaged and the pipeline refrigerant to leak. Obviously, the impact is relatively large and prone to failure.In two cases, it is not energized for a long time, because it is cold in the northern part of the winter, so many customers cut off the electricity of the liquid nitrogen cryogenic low temperature box. So what can you do in the end? If the refrigerant is not energized for a long time, the refrigerant will be converted from a gaseous state to a liquid state during operation, and it will be very easy to cause damage to the pipeline, which will lead to leakage. That is, leaking refrigerant.
Then don't frequent power outages. If there is no power failure when the compressor is not working, if there is a sudden power failure and then the power is turned on immediately when the compressor is working, the chance is caused by the large pressure difference between the two ends of the compressor. The liquid nitrogen cryogenic cold box has no way to work, so the thermal protection is stopped. If the protection zone of the liquid nitrogen cryogenic cold box is damaged, the motor will be burnt if it is serious.It seems that this situation is also more complicated. If you feel that the liquid nitrogen is cold and cold, you can choose LNEYA cryogenic low temperature box or ultra low temperature freezer, and the cooling effect is good.
Compared with other types of chillers, the overall energy consumption of high-quality screw water chiller is relatively small. Because the production technology of screw water chiller is more advanced and less energy is used, the equipment can quickly realize the purpose of reducing space temperature. The more screw water chillers are used in enterprises, the stronger the ability to reduce space temperature per unit time is, thus providing conditions for enterprises to reduce energy consumption costs. The longer the enterprises use screw water chillers, the less energy they consume as a whole.Because screw water chillers are designed and manufactured with advanced production technology, the overall failure rate is low. Even if the screw water chiller is used uninterruptedly for a long time, the screw water chiller will not have more faults. The fewer faults the screw chiller produces, the higher the safety factor of the enterprise using the screw water chiller, so as to provide technical guarantee for prolonging the service life of the equipment.Although the cooling performance of screw water chiller is very high, there are still many potential safety hazards when using screw water chillers. Because screw water chillers use more accessories, if a single component fails, it will threaten the normal operation of the equipment, and even lead to irreparable failure of the equipment. When enterprises use screw water chillers, they must be carefully tested to prevent all kinds of faults, so as to ensure that the long-term uninterrupted operation of screw chillers will not have any faults.How to prevent malfunction? If the screw water chiller fails many times, it will threaten the safety of the equipment. Before using the screw water chiller, it is necessary to carry out a comprehensive inspection of the equipment regularly, which can detect and deal with all kinds of faults in time, so as to prolong the service life of the equipment and help enterprises reduce the space temperature in the shortest time.
The thermal oil secondary circulation system is equipped with various instruments and equipment for temperature control. When using it, you need to pay attention to its safety knowledge and safer operation.LNEYA heat transfer oil secondary circulation system uses branded fully enclosed compressors with advanced performance and reliable quality. The relays, protectors, capacitors and other devices used in the equipment are all original high-quality equipment, ensuring the reliable performance and service life of the heat transfer oil secondary circulation system, integrating cooling, heating and circulation, and the power distribution of the heat transfer oil secondary circulation system is reasonable. Save space.
The heat transfer oil secondary circulation system should be filled with liquid medium in the front tank. Generally, the liquid level is 30mm-50mm below the work surface to prevent the heater from being burnt. The power supply is 220VAC/50Hz, and the equipment must have good grounding. The circulation pump is automatically turned on when the equipment starts to operate, and the refrigeration compressor will make corresponding start or stop commands according to the temperature of the equipment unless there is a special need.LNEYA heat transfer oil secondary circulation system adopts the automatic control function of circulating pump, that is, when the equipment is running, the circulation pump runs automatically. When the equipment is running, because of the function of the self-contained circulation pump, the liquid surface will show a flowing pattern if running. When there is no obvious flow state at the liquid tank interface, it means that there may be a helium state, and it should be exhausted in time. The device has its own cooling function. The cooling function can automatically issue a running or stop command according to the temperature of the device. It can also prohibit the compressor from running through the system parameters. When the device prohibits the compressor from running, the compressor needs to be set again to return to normal. Cooling operation.The equipment should be placed in a ventilated and dry place, and the back and sides should be separated from the obstacle by more than 300mm. After use, turn off the power switch and unplug the power cord. If it is not used for a long time, the liquid in the tank should be drained and scrubbed clean.When using the heat transfer oil secondary circulation system, it is necessary to pay more attention to the above problems, so that the use can achieve more efficient operation efficiency.
Semiconductor device test equipment is used more in the semiconductor industry. So, how much do you know about the applicable semiconductor conductors? The properties of this substance are still recommended to the user.In general, substances can be classified into conductors, insulators, and semiconductors according to their electrical conductivity. The conductive properties of a substance depend on the atomic structure. The conductor is generally a low-cost element, such as copper, iron, aluminum, etc., and the outer electrons are bound by the nucleus, so that it is easy to break the bond of the nucleus into free electrons. Therefore, under the action of an external electric field, these electrons generate directional motion (called drift motion) to form a current, which exhibits better electrical conductivity. The electrons of high-priced elements (such as inert gases) and high-molecular substances (such as rubber and plastics) are strongly bound by the nucleus. They are not easily detached from the nucleus and become free electrons. Therefore, they have poor conductivity and can be used as insulating materials. The outer electrons of semiconductor materials are not as easy to get rid of the nucleus as the conductors, become free electrons, and are not as tightly bound by the nucleus as insulators. Therefore, the conductive properties of semiconductors are somewhere in between.
A semiconductor with a pure crystal structure is called an intrinsic semiconductor. Commonly used semiconductor materials are silicon and germanium, which are tetravalent elements with four valence electrons in the outer orbital of the atomic structure. When a silicon or germanium material is drawn into a single crystal, a pair of outer electrons (valence electrons) of two adjacent atoms become a common electron, which on the one hand moves around their own nucleus and on the other hand appears in the orbit to which the adjacent atom belongs. on. Immediate electrons are not only affected by their own nucleus, but also by adjacent nuclei. Thus, two adjacent atoms share a pair of valence electrons to form a covalent bond structure. Therefore, in the crystal, each atom is closely related to the surrounding four atoms by covalent bonds.LNEYA's semiconductor device test equipment is widely used in high and low temperature testing, electronic equipment high temperature and low temperature constant temperature test cold and heat source.(Content source network, if there is any infringement, please contact to delete.)
There are certain differences in the size and performance of high and low temperature fully enclosed circulators from different manufacturers. Users need to pay attention to the placement position when placing them after purchase. If the placement position is not good, it is not conducive to the operation of high and low temperature fully enclosed circulators.In the installation of high and low temperature fully enclosed circulators, the heat dissipation efficiency of the high and low temperature closed loop circulators should be considered and the maintenance should be easy. The floor of the equipment must be flat and have sufficient strength (3.4 N/m2 or higher). Select a dust. And locations where vibration effects are small.High and low temperature fully enclosed circulators are to be installed in a dry room with a high and low temperature fully enclosed circulator, and where there is a power supply and sewer nearby, the equipment should be installed in a place with little dust. The wind condition causes no oxygen deficiency to occur even if the refrigerant (fluorohydrocarbon) leaks from the equipment.Good ventilation should be maintained around the installation of high and low temperature fully enclosed circulators. During operation, the device will radiate heat. If it is air-cooled, it will directly discharge heat through the condensed air. In the case of small room and poor ventilation, the indoor temperature will rise rapidly, causing the machine to stop running and alarm. . Installation of high and low temperature fully enclosed circulators should be kept away from flammable or explosive materials or other substances that may generate high heat.
When placing it, be careful not to let the sun directly project onto the device. When the device is used beyond this range, the safety device will start or the device will stop running. In order to achieve stable performance of the high and low temperature closed loop circulator, the installation room of the high and low temperature closed loop circulator should be air-conditioned to maintain the indoor temperature between 10 ° C and 30 ° C.The atmospheric environment of the high and low temperature fully enclosed circulator installation site is consistent with the general indoor air-conditioned atmospheric environment. If organic solvents, plasticizers, acids, alkalis or other chemicals are present in the air, the parts or coatings of the equipment may be corroded and destroyed.The precautions for placing the high and low temperature fully enclosed circulators should be taken seriously by our operators. Read the instruction manual in detail.
Because the principle and structure of each low temperature chamber are very complex, but do you know what technical matters you need to know before buying its equipment? Next, I want to share with you several technical issues before purchasing the equipment.
Question 1: Is the temperature change rate of temperature impact test the faster the better?
Explanation: Is the temperature change rate faster and better in the temperature impact test? Does the temperature change rate have any effect on the test results? What kind of temperature change rate is the good impact temperature change rate?
Question 2: What should I do to shorten the test time?
Explanation: When I do high temperature and humidity test or impact test, is there any way to shorten my test time so that the test results are the same?
Question 3: How to distinguish the temperature shock and temperature cycle of low temperature chamber?
Explanation: Where is the difference between temperature shock and temperature cycle, or are they all the same, just called differently?
Question 4: Should the impact temperature be OVER or below the set value?
Explanation: In the process of impact, should the impact temperature be higher or lower than the set value?
Question 5: Question in the experiment: Points for holding the sample to be tested?
Explanation: To put the test in the test furnace, how to get it right?
Question 6: Does the low temperature chamber first flush high temperature or low temperature?
Explanation: In the temperature impact test, how to decide if the specification does not require high temperature or low temperature first?
The thermal oil secondary circulation system is equipped with various instruments and equipment for temperature control. When using it, you need to pay attention to its safety knowledge and safer operation.LNEYA heat transfer oil secondary circulation system uses branded fully enclosed compressors with advanced performance and reliable quality. The relays, protectors, capacitors and other devices used in the equipment are all original high-quality equipment, ensuring the reliable performance and service life of the heat transfer oil secondary circulation system, integrating cooling, heating and circulation, and the power distribution of the heat transfer oil secondary circulation system is reasonable. Save space.
The heat transfer oil secondary circulation system should be filled with liquid medium in the front tank. Generally, the liquid level is 30mm-50mm below the work surface to prevent the heater from being burnt. The power supply is 220VAC/50Hz, and the equipment must have good grounding. The circulation pump is automatically turned on when the equipment starts to operate, and the refrigeration compressor will make corresponding start or stop commands according to the temperature of the equipment unless there is a special need.LNEYA heat transfer oil secondary circulation system adopts the automatic control function of circulating pump, that is, when the equipment is running, the circulation pump runs automatically. When the equipment is running, because of the function of the self-contained circulation pump, the liquid surface will show a flowing pattern if running. When there is no obvious flow state at the liquid tank interface, it means that there may be a helium state, and it should be exhausted in time. The device has its own cooling function. The cooling function can automatically issue a running or stop command according to the temperature of the device. It can also prohibit the compressor from running through the system parameters. When the device prohibits the compressor from running, the compressor needs to be set again to return to normal. Cooling operation.The equipment should be placed in a ventilated and dry place, and the back and sides should be separated from the obstacle by more than 300mm. After use, turn off the power switch and unplug the power cord. If it is not used for a long time, the liquid in the tank should be drained and scrubbed clean.When using the heat transfer oil secondary circulation system, it is necessary to pay more attention to the above problems, so that the use can achieve more efficient operation efficiency.
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1. Existence and absence of forced air test for heat dissipation test samples The method of guaranteeing the fluctuation of uniformity in high and low temperature test box is to adopt the wind circulation mode, in which the motor drives the fan to produce the wind circulation, thus forming the direction of wind speed. Non-forced air circulation test is a kind of test to simulate the influence of free air conditions, which is more suitable for the test of heat dissipation test samples. When forced air circulation is not used or test conditions are not guaranteed, forced air circulation can be used. One of the methods used in the test chamber is large enough to meet the test requirements without forced air circulation, but the required low temperature can not be maintained without forced air circulation in the chamber. Forced air circulation is required for refrigeration or heating of low temperature chamber. 2. Non-heat dissipation test samples and heat dissipation test samples When the temperature of the test sample is stable during the conditional test period, the hottest spot temperature on the surface of the test sample is higher than the ambient atmospheric temperature by 5 degrees under the condition of free air, which is considered to be heat dissipation, whereas the non-heat dissipation test sample is considered to be heat dissipation. All the storage test and the test period without power or load, the test samples are non-heat dissipation test samples, the test using low temperature test method. 3. Non-heat dissipation test samples Temperature gradient test of low temperature chamber(the former is a rapid temperature change test box and the latter is a cryogenic tester). (1) Temperature gradient test: first, test samples with room temperature are put into the same room temperature test box. Then turn on the cold source to gradually cool the temperature in the box to the specified test temperature. If the test sample is too large or too heavy, or because of the complex functional test wiring, it can not be put into the cryogenic chamber without frosting in the catastrophe test, the test should also be used. (2) Temperature catastrophe test: first adjust the temperature of the test chamber to the specified test temperature, and then put the test sample with room temperature. This test method is applicable when the known temperature abrupt change does not produce operation on the test sample.
In the heat transfer oil control system device, the heat transfer oil is used for the cooling and heating temperature control. If it is not the same as the LNEYA, the use of the fully closed circuit can affect the formation of certain coking, resulting in failure.In the heat transfer oil control system device, three main chemical reactions occur in the heat transfer process: thermal oxidation reaction, thermal cracking and thermal polymerization. Coking occurs from thermal oxidation reactions and thermal polymerization reactions. The thermal polymerization reaction occurs because the heat transfer oil is heated during the operation of the heating system, and the reaction generates macromolecular high-boiling substances such as condensed aromatic hydrocarbons, colloids and asphaltenes, which are gradually deposited on the surface of the heater and the pipeline to form coking.The thermal oxidation reaction of the heat transfer oil is mainly caused by the heat transfer oil in the expansion tank of the open heating system contacting the air or participating in the circulation, and the reaction generates low-molecular or high-molecular acidic components such as alcohol, aldehyde, ketone, acid, etc., and further generates Glue, asphaltene and other viscous substances, then form coking; thermal oxidation is caused by abnormal conditions, once it occurs, it will accelerate thermal cracking and thermal polymerization, so that the viscosity increases rapidly, heat transfer efficiency decreases, causing overheating and furnace tube Coking. The resulting acid can also cause corrosion and leakage of equipment.
The heat transfer oil control system device heat transfer oil will form a heat insulation layer during use, resulting in a decrease in heat transfer coefficient, an increase in exhaust gas temperature, and an increase in fuel consumption. On the other hand, since the temperature required for the production process remains unchanged, The heating temperature rises sharply, causing cracks, causing serious accidents such as equipment and operator personal injury.In the heat transfer oil control system device, if the heat transfer oil has a coking failure, the heat transfer oil control system device will be unavailable, and the heat transfer oil control system device is required to perform certain maintenance work.(This article is from the source network. If there is any infringement, please contact LNEYA for deletion, thank you.)
