Air source heat pump water heater unit with phase change heat accumulation

Abstract

The invention relates to an air source heat pump water heater unit, and particularly to an air source heat pump water heater unit with a phase change heat accumulator. An air source heat pump water heater unit with phase change heat accumulation is provided, which comprises a scroll compressor, an oil separator, a plurality of gas-liquid separators, a four-way reversing valve, a plurality of electromagnetic valves, a plurality of check valves, a double-pipe condenser, a water tank, a phase change heat accumulator, an evaporator, a dry filter, a liquid sight glass, and a plurality of thermal expansion valves, wherein the scroll compressor is provided with an air suction port, an air supplement port and an air exhaust port, the air suction port is connected with the evaporator via a pipeline, the air supplement port is connected with the phase change heat accumulator via a pipeline, and the air exhaust port is connected with the double-pipe condenser via a pipeline. Even if in a low-temperature environment (of lower than minus 25 DEG C), because the phase change heat accumulator is used as an auxiliary evaporator for the system, for providing heat to the system and supplementing air to the compressor, thus increasing the air input of the compressor, optimizing the running working condition of the compressor, and ensuring the stable and safe low-temperature running of the compressor.

Description

technical field [0001] The invention relates to an air source heat pump water heater unit, in particular to a low temperature air source heat pump water heater unit with a phase change heat accumulator. Background technique [0002] There are a series of problems when the air source heat pump unit operates in a low temperature environment for a long time, mainly including the following aspects: 1) System safety issues. The heat pump works in a low temperature environment for a long time, which deteriorates the operating condition of the system compressor and seriously affects the life of the compressor. When the ambient temperature is lower than -25°C, the compressor may even burn out. 2) There is a contradiction between energy supply and demand in the heating process of air source heat pump. When the outdoor temperature is relatively high, the heating capacity of the system increases, while the heat demanded by heat users decreases; when the temperature is relatively low,...

AI Technical Summary

Problems solved by technology

[0007] The main technical solution of the present invention is to solve the problems of poor defrosting reliability and large energy consumption loss caused by the insufficient heating capacity of the existing air source heat pump in the cold weather in the north and the insufficient heat for defrosting when the hot air is defrosting.

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