A heat pump water heater system

Abstract

The invention relates to a heat pump water heater system. The system includes a compressor, a condenser, a throttling device and an evaporator. The compressor is sequentially connected to the condenser, the throttling device, and the evaporator and returns to the compressor. It also includes a high-pressure storage liquid device, auxiliary throttling device, after the high-pressure liquid reservoir and auxiliary throttling device are connected in series, they are connected in parallel at both ends of the throttling device to perform double throttling control. Compared with the prior art, the invention has the advantages of wide throttling range, good throttling effect and the like.

Description

technical field [0001] The invention relates to a heat pump water heater system, in particular to a heat pump water heater system suitable for using a rotary compressor. Background technique [0002] Due to its own characteristics, the heat pump water heater system using a rotary compressor has a wide range of operating conditions. When the operating conditions change, electronic expansion valves and other throttling devices are required to stabilize the operating conditions. However, due to the high cost of electronic expansion valves, generally The system only uses capillary tubes to throttling; capillary tubes are generally only suitable for one working condition due to their non-adjustable limitations, and for heat pump water heater systems using rotary compressors that vary widely in working conditions, obviously some cannot meet their requirements. need [0003] Due to its own characteristics, the heat pump water heater system using a rotary compressor has a wide rang...

AI Technical Summary

Problems solved by technology

[0002] Due to its own characteristics, the heat pump water heater system using a rotary compressor has a wide range of operating conditions. When the operating conditions change, electronic expansion valves and other throttling devices are required to stabilize the operating conditions. However, due to the high cost of electronic expansion valves, generally The system only uses capillary tubes to throttling; capillary tubes are generally only suitable for one working condition due to their non-adjustable limitations, and for heat pump water heater systems using rotary compressors that vary widely in working conditions, obviously some cannot meet their requirements. need

[0003] Due to its own characteristics, the heat pump water heater system using a rotary compressor has a wide range of operating conditions, and when the operating conditions change, the amount of refrigerant cannot be changed synchronously; It is also high, which also affects the reliability of the compressor, and increases the power consumption of the system and decreases the system performance; under the condition that the evaporating temperature and the condensing temperature are low, the suction pressure is also low, and the cooling capacity of the system also degrades, ultimately degrading system performance

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