Air source heat pump water heater

Abstract

The invention discloses an air source heat pump water heater which comprises an evaporator (4), a compressor (1), an air cooler (2) and a throttling device (3) which are connected sequentially so as to form a circulating loop. One end of the air cooler is provided with a cold water inlet (21), and the other end of the air cooler is provided with a hot water outlet (23). The air source heat pump water heater also comprises a water collecting disc (6) and a pipeline (7), wherein the water collecting disc (6) is arranged on the bottom of an evaporator; the pipeline (7) is arranged in the water collecting disc and is used for refrigerant circulation; the water collecting disc is connected with a water drainage pipe (8); one end of the pipeline is connected with a refrigerant outlet (22) of the air cooler, and the other end of the pipeline is connected with an input end (31) of the throttling device (3). High-temperature high-pressure gas refrigerants compressed by the compressor in the air cooler exchange heat with cold water, are transformed to middle-temperature high-pressure liquid refrigerants, and flow through the water collecting disc at the bottom of the evaporator through a pipeline; ice is removed by utilizing the residual heat of the liquid refrigerants; and the favorable ice removing effect can be realized while the outlet water temperature of the water heater can not be lowered.

Description

technical field [0001] The invention relates to an air source heat pump water heater, which belongs to the field of household appliances. Background technique [0002] With the development of social economy, people's requirements for quality of life are getting higher and higher. Taking showers and baths as an example, gas water heaters, electric water heaters, solar water heaters, etc. have been far from satisfying people's needs for comfort, energy saving, and safety. Therefore, an air source heat pump water heater based on the heat pump cycle principle has been widely used. [0003] The air source heat pump water heater is mainly composed of an evaporator, a compressor, an air cooler, and an expansion valve. Constant entropy expansion consists of four cyclic processes. When working, it uses the evaporator and fan to absorb the low-temperature heat energy in the air. The refrigerant in the evaporator exchanges heat with the low-temperature heat energy and then evaporate...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the heat pump water heater in the prior art uses hot water to deice the evaporator while reducing the outlet water temperature of the water heater. Ice effect air source heat pump water heater

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