How can tell if thermal shock test chamber is leaking? 

Thermal shock test chamber for electronic and electrical engineering, military, automotive parts, optical communications and plastics and other industries, testing a variety of materials to high and low temperatures of repeated resistance to pull, test out the product in the thermal expansion and contraction of chemical changes or physical damage, can confirm the quality of the product, from the IC to the components of the heavy machinery, none of which need its approval. 

But in the process of use, sometimes because of refrigerant leakage leads to the temperature does not reach the set value. So how to determine whether the thermal shock test chamber leakage? What are the methods? 

Judge the thermal shock test chamber refrigerant leakage method: 

1, With the naked eye observation: 

Refrigerant in the thermal shock test chamber refrigeration unit in the circulatory system, will be with the hydraulic oil, so in the leakage time even in the pipeline hydraulic oil leaked out together; thus, we can check the position of the copper pipe welding, screws and buckles connecting position, valves and other locations are not oil stains, if there are traces of oil can be judged that there is a leakage of refrigerant. 

Since the temperature can not be maintained, first observe whether the refrigeration compressor can be started during the operation of the test room, as well as whether the compressor can be started during the operation of the environmental test equipment. This indicates that the circuit from the main power supply to each compressor is normal and there is no problem with the electrical system. 

2, Touch with your hands to check: 

According to the thermal shock test chamber to develop the target temperature for the low temperature value, the equipment must reduce the temperature refrigeration compressor will start, if the temperature reduction is slow or completely can not reduce the temperature, while the refrigeration compressor, cooler cooling fan, etc. are working all normal, then we can put the arm into the refrigeration compressor Koran side of the air-conditioning copper tubes, all normal conditions should be hot, the pressure root can not be put up! If it is not hot, we can judge that there is a leakage of refrigerant. 

Touch the exhaust pipe and suction pipe of the host R23 compressor with your hand, if you feel that the temperature of the exhaust pipe is not high, and the temperature of the suction pipe is not low (no frost), this shows the lack of (R23) refrigerant in the main unit.

3, Air pressure meter measurement method: 

First look for thermal shock test chamber refrigeration compressor bottom pressure end connector, generally on the side of the refrigeration compressor itself, remove the security screw cap, barometer bottom pressure tube received connector top, carry out the work pressure reading. Connect the high pressure hose connector of the barometer to the high pressure end connector of the refrigeration compressor, and carry out the reading. Generally speaking, the bottom pressure reading in the middle of 0.3-0.5 is the standard value, and the high pressure value in the upper and lower part of 1.5 is the standard value. If the two working pressures are less than the reading value, it can be judged that there is a leakage of refrigerant. 

4. Accurate measurement of electric flow: 

Check whether the exhaust and suction pressures of the low-temperature (R23) compressor of the two refrigeration units are lower than normal, and whether the suction pressure is in the pumping state, which indicates that the refrigerant quantity of the main refrigeration unit is insufficient. 

If the thermal shock test chamber cooler cooling fan, shell car circulation fan work are all normal, observe the refrigeration compressor work in the electric flow, if the refrigeration compressor work in the electric flow is lower than all normal work, the rated voltage of eighty percent of the refrigerant can be judged to have a leak. The above method of determining whether the refrigerant leakage of the thermal shock test chamber is shared here for you, I hope this article is helpful to you.