Heat pump water heater with changeable capacity and changeable flux

Abstract

The present invention relates to a variable-volume variable-flow heat pump water heater. It includes the following several portions: variable-volume compressor system, outdoor heat exchanger, outdoor fan, by-pass electromagnetic valve, four-way valve, vapor-liquid separator, electronic expansion valve, exhaust temperature probe, environment temperature probe, external disk temperature probe, suction air temperature probe, outdoor controller, indoor control plate, control panel, indoor heat exchanger, heat-insulating water storage tank, water outlet temperature probe, internal disk temperature probe, water outlet tube, water inlet tube and correspondent refrigerant pipeline and communication line. Said invention uses the leaving water temperature as object, utilizes compressor/variable volume compressor/hot air by-pass method and uses electronic expansion valve to accurately regulate and control throttle so as to implement stability and energy economization of said system.

Description

[0001] The invention relates to a heat pump air conditioner and a water heater, belonging to a system control method and system components, in particular to an energy-saving and load-variable water heater system. technical background [0002] The heat pump water heater uses the reverse Carnot cycle principle of the heat pump to heat the water through the process of heat absorption through the temperature difference between the refrigerant and the outside air, the compression heating of the compressor, and the continuous heat exchange between the refrigerant and water. Compared with traditional water heaters, heat pump water heaters have the following advantages: Safety of heat pump water heaters: Traditional water heaters are dominated by gas, electricity and solar energy, which are divided into three parts of the world. Gas water heaters are less safe, with insufficient combustion and low water pressure. Stability can easily cause gas poisoning and scald incidents. The hidden ...

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Problems solved by technology

[0003] However, heat pump water heaters are technically difficult to implement. This is because households need hot water throughout the year, and the water temperature on the condensing side often rises from 5°C to 55°C. It is very difficult for conventional heat pump air conditioners to adapt to such a wide range of changes

Patent 200310121162.2 In the indoor air source heat pump water heater, the evaporator is installed indoors, which relieves the adjustment pressure to a certain extent, but it is obviously unrealistic to install the compressor indoors, and the noise of the compressor is unbearable for users

In addition, domestic heat pump water heaters all use fixed-frequency compressors and thermal expansion valves or capillary throttling, which obviously cannot meet the above requirements.

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