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Small high and low temperature impact test chamber volume selection instructions
When the test product (components, components, components or complete machine) is placed in a small high and low temperature impact test chamber for testing, in order to ensure that the atmosphere around the test product can meet the environmental test conditions specified in the test specification, the small high and low temperature impact test There should be some points of attention between the working size of the box and the outer dimensions of the tested product. The volume of the tested...
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How to solve the problem of poor cooling performance of the heat transfer oil circulation system?
Some heat-conducting oil circulation systems will not be as good as before after 3 months of use. At this time, it is recommended to contact the professional after-sales department to check the user's power supply and whether the equipment is normal. The test heat conduction oil circulation system is set to cool operation, and the working pressure is 4.5kg/cm2. Considering that the variable frequency heat transfer oil circulation system uses the electronic expansion valve to throttle, it is n...
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How is the electric vehicle battery test driver grounded?
If the electric vehicle battery test is not isolated between the AC power source and the drive DC bus (such as a transformer), do not connect the non-isolated port of the DC bus or the ground of the non-isolated signal to the ground, which may result in equipment damage and personal injury. Because the common voltage of the AC is not to earth, there may be a high voltage between the DC bus ground and the earth. In most electric vehicle battery test systems, all common ground and earth are con...
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Multi-functional high and low temperature impact test chamber quality price element
Especially when purchasing multi-functional high and low temperature impact test chambers, the price factor often determines the quality of its products. After all, manufacturers have to survive. It is unlikely that they will sell high-quality equipment at low prices, so people are buying When paying attention to the quality of the product, only the quality can guarantee the effect that the user wants in the course of its use. Although the price of the multi-functional high and low temperatur...
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Effect of evaporator instrument for low temperature experiment on refrigeration system
According to different models, the choice of evaporators for low-temperature experiment special instruments is also different, such as box-type low temperature experiment special instruments, using water tank coil evaporator; open low temperature experiment special instrument and screw type refrigerator, then choose Shell and tube evaporator; for special instruments for acid and alkali resistance low temperature experiments, titanium tube evaporator or stainless steel plate exchanger can be s...
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High precision semiconductor incubator maintenance instructions
The high-precision semiconductor incubator is in the state of the evaporator as a gas refrigerant; after the adiabatic shrinkage of the shrinking machine, it becomes a high-temperature and high-pressure state, and the contracted gas refrigerant is condensed in the condenser by equal pressure, and is converted by condensation. The liquid refrigerant is expanded into a low pressure through a throttle valve to become a gas-liquid mixture. The liquid refrigerant at low temperature and low pressur...
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What are the effects of power failure on liquid nitrogen cryogenic cold box?
Different industries have different temperature requirements for liquid nitrogen cryogenic cryostats. Of course, there are many types of cryogenic cryostats. The refrigeration methods used in different industries are different. Wuxi Guanya LNEYA uses compressor refrigeration. The cooling effect that can be achieved is almost the same as that of the liquid nitrogen cryogenic cold box. However, there are still customers who use liquid nitrogen cryogenic cryostats, and customers who encounter a ...
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Semiconductor refrigeration temperature control system selection instructions
The choice of semiconductor refrigeration temperature control system should be based on the cold load and what to use for consideration. For refrigeration systems with long operating conditions with low load operation, it is suitable to select multi-head piston compressor unit or screw compressor unit for easy conditioning and energy saving. This is the dual-head semiconductor refrigeration temperature control system that we often say. With the change of load, the semiconductor refrigeration ...
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The importance of car cooling water cycle maintenance
Even if the overall running quality of the car cooling water circulation machine is high, if there is no maintenance and maintenance in the specified time, the car cooling water circulation machine may have different degrees of failure. Especially for many automotive cooling water circulation machines, after a long-term operation, a large scale problem will occur. If the scale cannot be effectively cleaned, after a long period of accumulation, the scale of the scale is continuously expanded, ...
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Causes of reduced heat transfer effect of vertical ultra-low temperature refrigerators
If the outer frost layer of the vertical ultra-low temperature refrigerator is too thick or excessively dusty, it may cause the external temperature of the equipment to be mostly lower than 0, resulting in low heat transfer efficiency of the evaporator. Because the vertical ultra-low temperature refrigerator has relatively high humidity, the moisture in the air is easy to frost on the surface of the evaporator, and even freezes, which affects the heat transfer effect of the evaporator. In ord...
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