When the high and low temperature test chamber compressor is working normally, the temperature of the steel casing on the side of the low pressure chamber of the compressor is very low. If the temperature of the compressor casing is lower than the dew point of the ambient air at that time, the water vapor in the ambient air will be in this Condensation of the parts. Therefore, the condensation of the high and low temperature test chamber compressor casing is a normal phenomenon related to the humidity of the environment. In order to prevent "liquid compression" in high and low temperature test chamber compressors, we need to take the following measures: 1 The accumulator or regenerator is arranged upstream of the suction pipe of the compressor to ensure that only the gaseous refrigerant is allowed to enter the compressor; 2 Install a hot gas bypass valve between the condenser and the evaporator or the condenser and the suction port of the compressor to ensure that no liquid refrigerant accumulates in the evaporator or the suction line. 3 When pouring the refrigerant, strictly control the amount of perfusion. What happens when the refrigerant liquid enters the compressor? When the refrigerant liquid entering the evaporator is excessive or the evaporation pressure is too low, the refrigerant liquid is sucked into the interior of the compressor. Since the liquid is incompressible, the valve piece is easily broken during the operation of the compressor, which is "liquid compression". "Liquid compression" is one of the most serious failures of refrigeration compressors and must be prevented. The Face access control attendance machine is mainly used for the attendance statistics of the company's employees. Have Android attendance Face Recognition and Linux attendance face recognition When employees sign in, they need to collect the employee's facial photos through the camera, and then use the attendance face recognition algorithm to obtain the feature values from the collected photos and store them in the database in face access control attendance system. Analyze and compare the feature values of the employee's face photos. If the employee's name is reported after the recognition is successful, the attendance is successful. Android Attendance Face Recognition,Linux Attendance Face Recognition,Face Access Control Attendance System,Face Access Control Attendance Machine Guangdong Zecheng Intelligent Technology Co., Ltd , https://www.zechengsecuritys.com