Air source heat pump water heater system and operation control method thereof
An air source heat pump and water heater technology, which is applied to heat pumps, fluid heaters, refrigerators, etc., can solve problems such as affecting the life of the compressor on the thermal efficiency of the whole machine, failing to achieve a good energy-saving effect, and shortening the defrosting time. The effect of avoiding economic loss, high temperature difference and reducing defrost time
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Embodiment 1
[0028] refer to figure 1 , is an air source heat pump water heater system of the present invention, comprising an outdoor unit and an indoor unit. The outdoor unit mainly includes a casing 1 , a fan 3 and an evaporator 2 arranged in the casing 1 . An outdoor ambient temperature sensor D1 is arranged inside the casing 1 of the outdoor unit, and an evaporator surface temperature sensor D3 is arranged on the evaporator 3 . The indoor unit mainly includes a compressor 9, a four-way reversing valve 5, an electronic expansion valve 8, a heat exchanger 7, a water tank liner 4, and a water pump 10. The water tank liner 4 is provided with a water temperature sensor D5 at the upper part of the water tank and a water temperature sensor D6 at the lower part of the water tank. The lower part of the water tank liner 4 is provided with a circulating cold water pipe communicated with the water inlet of the heat exchanger 7, and the upper part is provided with a hot water injection pipe comm...
Embodiment 2
[0049] The difference between the further embodiment and the air source heat pump water heater system of the above-mentioned embodiment 1 lies in: first, the temperature setting module, when setting the target water temperature T0 of the water tank, also sets the energy-saving factor M, and M is 40° C. to 60° C. Integer between ℃. Second, the control module is used for the following control: when the water temperature in the upper part of the water tank is T5≤T0-5°C or when T0>M and the water temperature in the upper part of the water tank is T5≤M-5°C, the electronic expansion valve will set the initial value of the electronic expansion valve after self-inspection. When the opening is 15% to 60%, start the compressor and fan, and the compressor will heat up. The rest of the air source heat pump water heater system in this embodiment is completely the same as that in Embodiment 1, and will not be repeated here.
[0050] The difference between this embodiment 2 and the control ...
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