Why can't the air conditioning compressor be used in the heat pump water heater?
Comparison of different operation modes of air conditioning and heat pump water heatersConsiderations in system designIn the actual system design, but also follow the rules of heat pump operation, so as to give full play to the function of the heat pump compressor. Specific attention should be paid to the following aspects:Throttling device ensures wide rangeWhether split or outdoor, the overall heat pump water heater, the evaporation temperature is very wide. In order to effectively throttle in a wide range, do not recommend using a single capillary, instead of using the expansion valve or capillary group, in response to changes in ambient temperature, ensure in all operating conditions have the superheat. Also avoid liquids entering the compressor directly, especially in winter.
Consumers buy heat pump water heater is the main driving force of energy saving and convenient, consumers will therefore more water, which also increased the heat pump work time.If the heat pump water heater for heating + hot water occasions, may throughout the heating season for long-term operation.Combined with the above factors, we can see that the heat pump water heater will be developed to a smaller size, and the actual running time will be greatly increased. To ensure that the heat pump water heater life cycle does not occur, the compressor needs to be able to withstand 20000 hours of actual operation, therefore, the use of heat pumps dedicated compressor is necessary.Comparison of different operation modes of air conditioning and heat pump water heaters
Air conditioners use a high frequency in summer, but water heaters are daily necessities and run for a long time in winter. Heating a box of water in winter is several times longer in summer, so it is necessary to confirm the operation mode of heat pump water heater in winter. According to statistical calculation, heat pump water heater has 2/3 life is consumed in winter.Because the water temperature of the heat pump in more than 55 degrees, with the use of the water tank, the temperature will drop, down to 45 degrees, the compressor will need to start running, so the compressor are basically running at higher condensing temperature region. Condensing temperature is the main factor affecting compressor life. Under the same running time, the comprehensive load of compressor in heat pump water heater is much higher than that in air conditioning compressor.
Long term stable operation without faultsCompared with the air conditioner, the running time of the heat pump water heater is very different, and the operation time of the heat pump water heater system is much higher than that of the air conditioner. The running time of a heat pump water heater depends on the following factors:
