How much does temperature affect the semi-hermetic refrigeration compressor

How much does temperature affect the semi-hermetic refrigeration compressor

Due to the high temperature in summer, some products that are more sensitive to temperature are easily affected by temperature. The use of semi-hermetic refrigeration compressors has a temperature limit. Exceeding or falling below this temperature will affect the use effect and service life.

　　 1. The influence of exhaust temperature

　　 In summer, the compressor's discharge temperature is relatively high and cannot be touched by hands. According to national standards, the exhaust temperature of the R22 refrigeration system should not exceed 150 degrees Celsius, and it is abnormal if it exceeds this temperature line. The reason for the excessively high exhaust temperature is the excessively high suction temperature of the compressor or the excessively high condensing temperature, which must be paid attention to. The exhaust temperature is too low, and the exhaust pipe is not hot when touching the exhaust pipe by hand. This indicates that the suction temperature is extremely low, and the compressor may be running in a wet stroke or the operating state of the system with relatively little working fluid. The wet stroke of the compressor is easy to damage the valve structure; the refrigerant runs under unusual circumstances, which will affect the heat dissipation of the motor winding and accelerate the aging of the insulating material.

　　2. The influence of the temperature change of the casing on the compressor and refrigeration system

The temperature field of the casing of a fully enclosed reciprocating piston compressor can be divided into two parts: a. The upper casing is affected by the inhaled vapor, and the temperature is relatively low, and it is in the slightly hot or slightly cooler range. There may be dew condensation on the surface of the casing around the pipe. B. The heat generated by the motor in the lower casing and the frictional heat carried by the refrigerating oil are mainly carried out of the casing by steam.

　　1) The influence and reason of the case temperature is too high

　　 The surface temperature of the case exceeds the normal range, mainly because the suction temperature of the refrigeration system is too high (above 15 degrees Celsius). Excessively hot steam enters the compressor and absorbs the heat in the casing to make the temperature of the steam higher, thereby increasing the temperature of the casing. The temperature of the superheated steam rises very high, and the temperature of the casing also rises very high, which is not good for the cooling of the oil, which will affect the lubrication of the moving parts, accelerate the wear, and cause the bearing to seize (seize) in severe cases. It will also cause the exhaust temperature to rise.

　　2) The influence and reason of the case temperature is too low

The surface temperature of the case is lower than the normal range because the suction temperature is too low (below 15 degrees Celsius). It is beneficial to the cooling of refrigerating oil and motor windings, but the cooling capacity is reduced. When the suction temperature is particularly low, it will cause most of the casing to condense, and there is a danger of liquid strike. This is a fatal blow to the compressor, and special attention should be paid. At the same time, a large amount of refrigerant is dissolved in the refrigerating oil, which is not conducive to the lubrication of moving parts.

　　General consumers use the hand feel to detect the temperature of a semi-hermetic refrigeration compressor, because it is not very convenient to use a thermometer. If there is an abnormal temperature in the use of the semi-hermetic refrigeration compressor, it needs to be dealt with in time