Reasons for Rotor Compressor Cylinder Jamming in Heat Pump Applications

As Copeland compressors are increasingly used in heat pumps, the disadvantages of rotor compressors are slowly becoming apparent. In particular, the phenomenon of cylinder jamming often occurs in heat pumps using rotor compressors. Compressor operation due to poor lubrication, impurities and other reasons caused by the relative moving parts bite each other and can not run the phenomenon, the compressor card cylinder indicates that the compressor has been damaged.

Compressor processing is poor, there is a local uneven force on the mating surface, or processing technology is unreasonable, the compressor production impurities into the compressor inside, for the brand compressor this situation is less likely to occur. Compressor and the adaptability of the system: heat pump water heater is developed on the basis of air conditioning, so most heat pump manufacturers extend the use of air conditioning compressor. The highest temperature required in the national standard for air conditioning conditions is 43 ℃, that is, the highest temperature of the condensing side of 43 ℃, the highest exhaust pressure of the compressor at this temperature is generally not more than 23kg/cm2. and heat pump conditions in the national standard for water temperature of 55 ℃, that is, the temperature of the condensing side of 55 ℃, the highest exhaust pressure at this temperature is generally 25kg/cm2, if the ambient temperature on the evaporative side of 43 ℃, the exhaust Pressure is generally around 27kg/cm2, which makes the compressor often in a high load working condition.