Direct-heating sensible heat superposed fluorine water circulation air energy water heater and heating method thereof

Abstract

The invention relates to a direct-heating sensible heat superposed fluorine water circulation air energy water heater and a heating method thereof. According to the direct-heating sensible heat superposed fluorine water circulation air energy water heater and the heating method thereof, mechanical heat and part of latent heat of a compressor are absorbed by a sensible heat exchanger in a fluorinepath, and then return to a four-way valve, so that overheating of return air temperature is avoided, and the energy efficiency is improved bidirectionally; then the mechanical heat and the part of latent heat are subjected to heat exchange through a medium-temperature water circulation heat exchanger and finally are subjected to undercooling heat exchange through a fluorine circulating coil heat exchanger, and then return to the compressor through a throttle valve and an evaporator to finish fluorine path circulation; and for a water path, supercooling low-temperature heating of cold water iscompleted through the fluorine circulating coil heat exchanger, then medium-temperature circulating heating of a water tank is completed through the medium-temperature water circulation heat exchangerand a sensible heat exchanger, and when hot water is used, the temperature is the high-temperature water supply temperature which is obtained through the superposition of the water tank temperature and heating of the medium-temperature water circulation heat exchanger and the sensible heat exchanger. Due to the fact that the water heater is the directly-heated circulation air energy water heater,when the cold water is fed, a circulation water pump also works, so that the stability is improved; and when the hot water is supplied, a double-temperature probe controls a main machine to be started to complete water temperature superposition, so that the temperature of the water tank is reduced, heat preservation loss is reduced, and the energy efficiency is higher.

Description

technical field [0001] The invention relates to the field of water heaters, in particular to a direct heat sensible heat superimposed fluorine water circulating air energy water heater and a heating method thereof. Background technique [0002] Existing air-energy water heaters need to maintain the water temperature in the water tank at 50°C, and the water heater starts heating when the temperature of the water tank drops by 5°C. In addition, when the user uses water, the cold water is directly added to the water tank to mix with the hot water in the water tank. As a result, the temperature of the water in the water tank drops sharply, causing the temperature of the water tank to be unstable, and the compressor needs to be started frequently to heat the water in the water tank, which wastes the heat energy in the water tank and increases the energy consumption of the water heater. [0003] Therefore, how to optimize the hot water mode of the existing air energy water heater,...

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