(1) Influence of exhaust temperature In summer, the exhaust temperature of the compressor is relatively high, and the hand cannot be touched. According to national standards, the exhaust temperature of the R22 refrigeration system should not exceed 150 OC. Exceeding this temperature line is an abnormal condition. Over temperature of the exhaust gas, a compressor intake temperature is high, or ultra-high temperature caused by condensation, requires attention. Exhaust gas temperature is too low, the hand touches the exhaust pipe is not hot, which indicates that the inhalation temperature is extremely low, the compressor may be wet running or the system working condition is relatively small. The wet stroke of the compressor easily damages the valve structure; the operation of the refrigerant is extremely small, which will affect the heat dissipation of the winding of the motor and accelerate the aging of the insulating material.
(2) The influence of the temperature change of the casing on the compressor and the refrigeration system The temperature field of the outer casing of the fully enclosed reciprocating piston compressor can be divided into two parts: a. The upper casing is affected by the suction vapor, the temperature is relatively low, and it is in the micro The range of heat or slightly cool, estimated to be around 30 OC, there is the possibility of dew condensation on the surface of the local casing around the suction pipe . B. The heat generated by the motor in the lower casing and the frictional heat carried by the frozen oil are mainly taken out of the casing by the steam.
a. The effect of high temperature of the casing and the reason why the surface temperature of the casing exceeds the normal range, mainly because the suction temperature of the refrigeration system is too high (above 15OC). High superheated vapor enters the compressor, the heat absorption housing the higher temperature of the vapor, so that the temperature rise on the housing. The temperature of the superheated steam rises very high, and the temperature of the casing rises too high, which is unfavorable for the cooling of the oil, which affects the lubrication of the moving parts, accelerates the wear, and causes the bearing to hold the shaft (biting). It also causes the exhaust gas temperature to rise.
b. The effect of low temperature of the casing and the reason why the surface temperature of the casing is lower than the normal range is because the suction temperature is too low (less than 15 OC). It is good for cooling both the refrigeration oil and the motor windings, but the cooling capacity is reduced. When the intake air temperature is particularly low, make the most of the only condensation dryer shell, there is a risk of liquid hammering, this was a crushing blow to the compressor, should pay special attention. At the same time, a large amount of refrigerant is dissolved in the frozen oil, which is not conducive to the lubrication of moving parts.
Fruit fresh-keeping cabinet compression condensing unit The influence of temperature change on the refrigeration system The temperature of the unit components has a normal temperature range. If it exceeds this range, it is abnormal. Cause these abnormal factors may be defective or may not be adjusted correctly, but they want to analyze its causes and timely treatment or examination. These temperature points are difficult to measure with a thermometer, and generally can only be estimated by hand, and then judged whether it is normal.
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