Battery-specific temperature cycle test chamber Chiller tips

With the rapid development of the economy, the new energy automobile industry has also achieved rapid development, and the requirements of the battery industry are also getting higher and higher. In order to adapt to related industries, LNEYA has developed and produced the battery-specific temperature cycle test chamber Chiller, which has won the favor of large domestic and foreign companies. Therefore, today Xiaobian made a description of the use of the battery-specific temperature cycle test chamber Chiller.

The pressure ratio of the Chiller cycle of the battery-specific temperature cycle test chamber increases, the gas transmission coefficient of the compressor decreases, the actual suction volume decreases, the cooling capacity decreases, and the compressor power consumption increases, and the refrigeration coefficient decreases. When the actual resistance loss of the system is less than the nameplate head of the circulating water pump, the flow rate of the pump working point is greater than, and the head is less than the pump nameplate parameter. If other conservative factors of the design are added, the intersection of the pump characteristic curve and the system characteristic curve will always be biased to the lower right direction. Therefore, the flow rate will be greater than the larger the pressure ratio, and the greater the influence.

The external temperature of the thermal expansion valve (including the electronic expansion valve) Under normal conditions, the lower half of the expansion valve body is very cool, and there is dew, the refrigerant flow is very dull. Under abnormal conditions, first, the valve body is relatively cold, the surface has more dew, and even frost, the refrigerant has a loud sound (gas flow). The reason is that the filter is blocked, or the refrigerant in the power box leaks, and the valve hole is closed. The temperature of the Chiller capillary of the battery-specific temperature cycle test chamber is normal, the capillary is cool and dew is formed, and there is liquid flow sound. Under abnormal conditions, the surface is very cool and condensation, but the sound of the flow is louder, which is the flow of gas. The reason is that the refrigerant is insufficient. Second, the surface is not cool, condensation does not occur, and the flow sound is not heard. It is a filter blockage or capillary blockage. Battery temperature cycle test chamber Chiller evaporator temperature conditions Under normal conditions, the outer surface of the evaporator is very cold, the condensation water drops continuously, the temperature of the inlet and outlet air is large, usually Δt can be 12~14oC; abnormal situation The surface of the evaporator is not too cool, the dew is not much, or there is no condensation. It can be heard that the flow of the refrigerant is very loud, and the temperature difference between the inlet and outlet is small. The reason is that the refrigerant amount is insufficient, or the expansion valve opening degree is small.

Battery temperature cycle test chamber Chiller fully enclosed reciprocating piston compressor case temperature field can be divided into two parts, the upper case is affected by the suction of steam, the temperature is relatively low, in the slightly hot or slightly cool range, in the suction pipe There is the possibility of dew condensation on the surface of the local casing around it. The heat generated by the motor inside the casing and the frictional heat carried by the frozen oil are mainly carried out by the steam.

The effect of the case temperature is too high and the reason The surface temperature of the case exceeds the normal range, mainly because the intake temperature of the refrigeration system is too high. Excessive heat vapor enters the compressor and absorbs heat from the casing, causing the temperature of the steam to rise, thereby increasing the temperature of the casing. The temperature of the superheated vapor rises very high, and the temperature of the casing rises too high, which is unfavorable for the cooling of the oil, which affects the lubrication of the moving parts, accelerates the wear, and causes the bearing to hug the shaft. It also causes the exhaust gas temperature to rise.

The above are the tips and instructions to be used during the use. You need to contact LNEYA when you need to know the device parameters or even the device video. Email address: sales@cnzlj.com

Battery test cooling device Chiller common configuration instructions

Under normal use, the battery test cooling device Chiller needs to be discovered in time when any part of the abnormality occurs. This requires a clear understanding of the basic configuration of the battery test cooling device Chiller.

The battery test cooling device Chiller shell and tube condenser housing is normally the upper half is warmer and the lower half is warm. Under abnormal conditions, the entire housing is not too hot, and the original refrigerant amount is not enough. In another case, the entire housing is very hot due to insufficient cooling water or poor heat dissipation (scale in the water pipe). Under normal conditions, the casing condenser is very hot. The reason is that the cooling water is too small or the heat dissipation effect is poor. The other is that the outer surface of the casing is not too hot, because the refrigerant amount is insufficient.

Under normal circumstances, the battery test cooling device Chiller suction pipe feels cool and feels dew due to poor heat dissipation in the condenser, high condensation temperature or excessive refrigerant charge. Under normal conditions, the liquid tube is warm. Under abnormal conditions, the liquid tube is hot. The reason is that the condenser has poor heat dissipation, high condensation temperature or excessive refrigerant flow. Under normal conditions, the suction tube feels cool and feels dew. Under abnormal conditions, first, the suction pipe is cold and the dew is too much, so that the casing is exposed to a large area. The reason is that the refrigerant flow rate is too large, the liquid cannot be completely vaporized in the evaporator, and there is a liquid reflux phenomenon.

Battery test cooling device Chiller thermal expansion valve appearance temperature (including electronic expansion valve) Under normal circumstances, the lower half of the expansion valve body is very cool, and there is dew, the refrigerant flow is very dull. Under abnormal conditions, first, the valve body is relatively cold, the surface has more dew, and even frost, the refrigerant has a loud sound (gas flow). The reason is that the filter is blocked, or the refrigerant in the power box leaks, and the valve hole is closed. Under normal circumstances, the outer surface is very cold, and the condensation water drops continuously. The temperature of the inlet and outlet air is large, abnormal, the surface of the evaporator is not too cool, the dew is not much, or there is no condensation, and the refrigerant can be heard. The flowing sound is very loud, and the temperature difference between the inlet and outlet is small.

LNEYA battery test cooling device Chiller is equipped with brand accessories in the configuration, which has certain guarantees in safety and runs more smoothly and efficiently.

The above are the tips and instructions to be used during the use. You need to contact LNEYA when you need to know the device parameters or even the device video. Email address: sales@cnzlj.com

Battery pack cooling water machine Chiller use precautions

The battery pack cooling water machine Chiller is used for the new energy battery pack cooling system. The user needs to pay attention to avoid misuse during operation, which causes the battery pack cooling and circulating water machine Chiller to malfunction.

Battery pack cooling circulating water machine Chiller's electrical system needs to pay attention to the electrical control system including power local and automatic control local, the power supply is partially through the contactor, supply power to the compactor, fan, water pump, etc., the automatic control part includes the thermostat, pressure Maintenance, delay, relay, overload maintenance, etc. are combined with each other to achieve automatic start and stop, maintenance and other functions according to water temperature.

The liquid reservoir device is in direct communication with the discharge pipe of the condenser after the condenser, and the refrigerant liquid of the condenser should flow unimpeded into the liquid reservoir, so that the cooling area of the condenser can be fully utilized. On the other hand, when the heat load of the evaporator changes, the demand for the refrigerant liquid also changes. At this time, the reservoir functions to regulate and store the refrigerant. The battery pack cooling water machine Chiller must prevent moisture and dirt (oil, iron filings, copper filings) from entering the refrigeration cycle, if the moisture in the system is not cleaned, when the refrigerant passes through the throttle valve (thermal shrink valve or In the case of a capillary tube, moisture may solidify into ice due to pressure and temperature drop, which may block the passage and affect the normal operation of the refrigeration installation.

Before the battery pack cooling circulating water machine Chiller is in operation, it is necessary to pay attention to connect the power cord (5m) connected to the control unit to the power supply when connecting the power supply. At this time, it is necessary to connect the ground terminal ( E) Otherwise, there is a risk of electric shock due to misuse and water leakage. The machine water supply needs to pay attention to close the water tank drain valve, open the water source valve, water supply valve, cold water output valve, cold water input valve. Regarding the water temperature and flow rate of cooling water and refrigerant water, the user should follow the data provided on the technical parameter table, otherwise the machine will not work properly.

The above is to learn more about some use points before use, avoid misunderstandings, and use the battery pack cooling water machine Chiller more efficiently. You can contact LNEYA when you need to know the device parameters or even the device video. Email address: sales@cnzlj.com

Factors affecting the cooling capacity of the chiller of the chemical reactor cooling system

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

Professional introduction and application of cooling circulating water machine

The cooling water machine (the chiller, also known as the chiller) is an air-cooled water circulator 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.

Web：https://www.lneya.com

Mail：sales@cnzlj.com

Tel：+86-13912479193

Clean of Ultra-low Temperature Freezer

Cleaningmachineshell: Semi-annual First wipe the machine shell from top to bottom with soapy water or disinfectant commonly used in the laboratory, then wipe it thoroughly with clean water, and dry it with a soft dry cloth. Cautions: Avoid using too much water to clean the control board area, in order to prevent leakage damage of circuit components. 

Cleanenvironment of ultra-lowtemperature freezer: Once a month Clean up all ground debris and dust with sanitary ware, reduce dust adsorption in compressor and refrigeration system, affect heat dissipation Prevent dust from adsorbing on circuit board, causing circuit components to be damaged by interference Sealing test of door seals: Once every six months, poor sealing will increase the working time of compressor and cause compressor failure. Open the door, then put in a sheet of A4 paper, close the door, pull A4 paper out, if it is difficult to pull, it shows good sealing. It needs to be tested all around the door seal. 

Clean air filter: Clean at least 4 times a year Grasp the button at the bottom left corner and open the door directly below the cryogenic freezer. Remove the black air filter and wash it with water or neutral detergent. After drying, place the filter in place. If it's already dirty, the dust and debris on it can't be removed, and a new filter needs to be replaced. Clean condenser: at least twice a year Refrigerator radiates heat to the outside environment through condenser. 

Ash accumulation in condenser and filter will cause heat dissipation obstruction and decrease refrigeration efficiency of refrigerator. 

1. Grasp the button at the bottom left corner and open the door directly below the refrigerator. 

2. Use a vacuum cleaner to clean the dust on the condenser, or use compressed air to blow off the dust adsorbed on the condenser, or brush off the dust with a fine brush. Notes: According to the environmental conditions of different laboratories, it is necessary to clean the condenser several times a year. And in the cleaning process, do not damage the radiator on the condenser. Intracavity defrosting: once a year or when the thickness of defrosting exceeds 10 mm High humidity, frequent door opening can easily lead to frost inside the door. Excessive frost, ice will affect the performance of refrigerators, can be deicing shovel and vacuum cleaner deicing. 1. Transfer samples from all chambers to another cryogenic refrigerator 2. Turn off the battery switch, the main power switch, and pull out the power cord. 

3. Open all the inner doors and let the ice melt and wipe it off with a soft rag. 

4. When the frost is removed, the inner cavity needs to be thoroughly cleaned with hot water or detergent (soda water) without chloride and wiped with a dry cloth. 

5. Re-insert the power cord and turn on the main power switch and battery switch. 

6. Samples can be placed after the refrigerator runs empty overnight. 

We are a ultra low temperature freezer manufacturer. Welcome to choose our products.

Web：https://www.lneya.com
Mail：sales@cnzlj.com
Tel：+86-13912479193

Description of the development of the wafer chip test system

With the development of the semiconductor industry, the wafer chip test machine has also made great progress. How much do you know about the development of the wafer chip test machine?

The integrated circuit industry has gradually emerged since the 1960s. Early companies were operating models. This model covers the entire chip production process of design, manufacturing, packaging and testing. Such enterprises generally have large scale, comprehensive technology and deep accumulation. Such as Intel, Samsung and so on. As the cost of technology upgrades increases and the requirements for the production efficiency of the IC industry increase, the entire industry is gradually moving toward a vertical division of labor.

This vertical division of labor greatly enhances the operational efficiency of the entire industry. Secondly, the design of relatively light assets and the separation of manufacturing and packaging of heavy assets are conducive to centralizing R&D investment in all aspects, accelerating technological development, and reducing the accuracy of enterprises. Entry threshold and operating costs; in addition, each link is handed over to different vendors to enhance the professionalism of the company and the accuracy of the production process. In addition, the separation of professional tests from the packaging and testing can reduce the repetitive capacity investment, and can provide professional testing services for small and medium-sized design manufacturers stably, reduce the testing cost of products and reduce the industrial cost by scale effect.

The IC test card is the key node of the industry chain, which runs through the whole process of design, manufacturing, packaging and application. From the perspective of the entire manufacturing process, integrated circuit testing includes design verification at the design stage, process inspection at the wafer fabrication stage, wafer testing before packaging, and finished product testing after packaging, throughout the design, manufacturing, packaging, and application. The process plays an important role in ensuring chip performance and improving the efficiency of the industrial chain.

Design verification, also known as laboratory testing or characterization testing, is to verify that the design is correct before the chip enters mass production and requires functional testing and physical verification. Process process inspection, that is, testing in the wafer manufacturing process, requires inspection of defects, film thickness, line width, critical dimensions, etc., and is a front test.

Wafer testing is performed by testing the completed wafers with the goal of picking out the bad dies before dicing to reduce the cost of packaging and chip testing, while counting the dies on the wafer. The pass rate, the exact position of the unqualified die, and the qualification rate of each type can directly reflect the wafer manufacturing yield and verify the wafer manufacturing capability.

After the chip is finished, the circuit will be damaged during the dicing, bonding, encapsulation and aging process of the integrated circuit. Therefore, after the package and aging, the circuit performance of the finished circuit should be tested according to the test specifications. Qualified finished products are graded according to the parameter specifications of the device performance, and the number of devices at various levels and the statistical distribution of various parameters are recorded. According to these data and information, the quality management department supervises the quality of the products and the production control unit controls the production of the circuits.

The development of wafer chip and wafer chip test system equipment, we must understand it, I hope that users can choose the regular manufacturer's wafer chip test system equipment when making purchases.

Web：https://www.lneya.com
Mail：sales@cnzlj.com
Tel：+86-13912479193