Preheating type heat pump water heater using stored heat caused by phase change

Abstract

A phase-change heat-accumulation preheating type heat-type water heater is sequentially composed of evaporator, compressor, heating heat exchanger, heat-accumulating heat exchanger, throttle device and heat-getting heat exchanger. A blower is close to said evaporator. The heat-accumulating and heat-getting heat exchangers and the phase-change material are contained in an insulating container. Thesaid heat-pump heater is controlled by a controller. Its advantages are durable and stable supply of hot water, light weight, small size and low power consumption.

Description

technical field [0001] The invention relates to a heat pump water heater for providing hot water, in particular to a phase-change heat storage preheating type heat pump water heater. Background technique [0002] The water heaters currently on the market are mainly solar water heaters, gas water heaters and electric water heaters. Domestic patent technical materials also mention heat pump water heaters, including electronic heat pump water heaters and conventional compression heat pump water heaters. [0003] All there are some problems and deficiencies in above-mentioned these water heater equipments. The ability of solar water heaters to provide hot water is greatly affected by regional climate conditions; electric water heaters and gas water heaters have been used for many years in households and have shown that there are always hidden dangers to personal safety. Electric water heaters have the risk of electric shock, and gas water heaters have ...

AI Technical Summary

Problems solved by technology

The ability of solar water heaters to provide hot water is greatly affected by regional climate conditions; electric water heaters and gas water heaters have been used for many years in households and have shown that there are always hidden dangers to personal safety. Electric water heaters have the risk of electric shock, and gas water heaters have gas poisoning and suffocation. There are many reports of death due to the use of this type of water heater; and electric water heaters and gas water heaters use natural gas, coal gas or electric energy to heat domestic hot water, which consumes a lot of energy, high operating costs, and the heating coefficient value is lower than 1.

The heat pump water heater proposed in the existing patent technical specification can theoretically achieve the purpose of safety and energy saving, but it has not been widely used so far. This is because the electronic chips used in the electronic heat pump water heater are expensive and use DC power supply requires special AC-DC conversion equipment; conventional compression heat pump water heaters require water storage containers, which are large in size, large in input power, and high in manufacturing costs

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