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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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How to judge the quality of the pipeline for electroplating waste gas treatment?
Generally, when purchasing the electroplating waste gas treatment equipment, it is necessary to observe the appearance of the copper tube to judge. The first is to look at the color of the copper tube. According to the type of copper tube purchased, different colors are judged, such as a copper tube, and the red color of the general color is reddish. It is good copper. Brass tubes, generally lighter in color, are better. There is also a layer of zinc on the copper, some galvanized, and the co...
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High-pressure failure of stainless steel cryogenic refrigerator
At the high speed of the stainless steel cryogenic refrigerator compressor, the temperature rises and the compressor generates high air pressure, which causes the high voltage protection relay to operate. The discharge pressure of the compressor reflects the condensing pressure. The normal value should be 1.3~1. 7MPa, and the protection value of the Wuxi Guanya stainless steel cryogenic refrigerator is set to 2.1MPa. Then, if it is a long-term work, the compressor pressure is too high, which ...
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General high and low temperature integrated machine valve repair detailed description
The conventional high and low temperature integrated machine valve replaces the packing, and the main function of the packing is to prevent the working medium from leaking along the axial direction of the valve stem. In case of minor leakage, the packing gland can be tightened. If the leak cannot be eliminated, the packing should be replaced. When replacing, the valve stem must be screwed out to the end. Use the filler needle to pull out the old packing, then screw the prepared new packing in...
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Description of refrigeration principle in semiconductor wafer temperature control
In the operation of the semiconductor wafer temperature control refrigeration system, a state transition of a certain working fluid is used, and the necessary heat Q0 is extracted from the heat source of a lower temperature, and the heat Qk is sent to the heat source of the tropical heat through a storage process of the consumption power W. In this process, Qk = Q0 + W is taken from the conservation of energy. In order to achieve temperature control of semiconductor wafer temperature migratio...
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