When there is a phenomenon in which the expansion valve is supplied with liquid in the high and low temperature test chamber refrigeration system, or the expansion valve is not small, the degree of superheat, and the degree of undercooling are incorrect. The reason may be that the temperature sensor has failed.
1) The capillary of the temperature sensing package is broken, so that the filling material in the temperature sensing bag is leaked, so that the correct signal cannot be transmitted to the actuator of the thermal expansion valve.
2) The temperature sensing package is not in the correct position.
Second, the temperature package failure treatment
In general, the temperature sensor should be installed on the return pipe of the horizontal section of the evaporator outlet. It should be kept away from the suction port of the high and low temperature test chamber compressor and close to the evaporator, and it should not be installed vertically. When the horizontal return pipe diameter is less than 7/8 (22mm), the temperature sensing package should be installed at the top end of the return pipe, that is, the "one o'clock" of the suction pipe. When the horizontal return pipe diameter is greater than 7/8, the temperature sensor package should be installed below the axis of the return pipe at about 45 degrees from the horizontal axis, that is, the "3 o'clock" position of the suction pipe. Because installing the temperature sensor on the upper part of the suction pipe will reduce the sensitivity of the reaction, which may cause too much refrigerant in the evaporator. Installing the temperature sensor on the bottom of the suction pipe may cause disturbance of the liquid supply, because there is always a small amount. The liquid refrigerant flows to the location where the temperature sensing package is installed, resulting in a rapid change in the temperature of the temperature sensing package.
When installing, the temperature sensing package needs to be wrapped with copper sheets. The surface of the return air tube should be rust-removed. If it is a steel tube, the surface is rust-proof and silver-coated to ensure good contact between the temperature sensing package and the return air tube. The temperature sensor bag must be lower than the upper cavity of the valve top diaphragm, and the head of the temperature sensing bag should be placed horizontally or downwards. When the relative position is higher than the upper cavity of the diaphragm, the capillary of the high and low temperature test chamber should be bent upward into a U shape. In order to prevent liquid from entering the upper cavity of the diaphragm.
?
Air Refresher and odor eliminator
Product name:Air Refreshener And Odor Eliminator Mist Brand:YIQUN AEROSOL V-MAFA Volumn:120ml, 250ml Certificates:ISO 9001,ISO 14001,OHSAS 18001,SVHC,MSDS,CARB VOC,CA65 MOQ5,000 pieces Formula:Customize formula or use our pre-defined formula Can Printing:Design new packaging for you or provide us with your design Sample time:3-5 days Price Terms:EXW, FOB and CIF Payment terms:T/T,LC,Alibaba Insurance Trade We are manufacturer of Air Refresher in China, if you want to buy Air Refresher,Air Purifier,Odor Eliminator,Car Air Freshener,Air Refresher Spray please contact us.The Air Freshener Odor Eliminator Manufacturer and Supplier is high quality product.
Air Refresher,Air Purifier,Odor Eliminator,Car Air Freshener,Air Refresher Spray
Linyi Yiqun Packaging Products Co., Ltd , https://www.yiqun-china.com