Heat pump system, control method and air conditioner

Abstract

The invention discloses a heat pump system, a control method and an air conditioner. The heat exchanger includes a heat dissipation structure and a first heat exchange passage and a second heat exchange passage arranged on the heat dissipation structure, wherein the first heat exchange passage and the second heat exchange passage have independent fluid inlet and fluid outlet. The heat exchanger provided by the present invention has two mutually independent heat exchange passages, and two different refrigerants can circulate in the two heat exchange passages respectively, and the flow directions of the refrigerants can be the same or different, and the two heat exchange passages have independent The fluid inlet and fluid outlet, so that the two heat exchange channels can be connected to different refrigerant flow channels to obtain different heat exchange effects. The heat exchange between the two heat exchange channels can be carried out through the heat dissipation structure. When one of them When the heat exchange path is heating and the other heat exchange path is cooling, the defrosting of the heating heat exchange path to the cooling heat exchange path can be realized.

Description

technical field [0001] The present invention relates to the technical field of air conditioning, and more specifically relates to a heat pump system, a control method and an air conditioner. Background technique [0002] At present, the defrosting problem has always been the focus and difficulty to be solved in the research and application of the air source heat pump system, and the current heat pump system generally uses the four-way valve reversing method to defrost, and the high-temperature and high-pressure refrigerant from the compressor flows to the outdoor for exchange. Heater, the throttled low-pressure low-temperature refrigerant flows to the indoor heat exchanger. This method needs to suspend the original heating mode to defrost, which greatly reduces the heating performance and efficiency of the heat pump unit. [0003] In order to solve the above problems, a heat pump system is provided in the prior art. Two outdoor heat exchangers are provided, and the two outdo...

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Problems solved by technology

[0002] At present, the defrosting problem has always been the focus and difficulty to be solved in the research and application of the air source heat pump system, and the current heat pump system generally uses the four-way valve reversing method to defrost, and the high-temperature and high-pressure refrigerant from the compressor flows to the outdoor for exchange. Heater, the throttled low-pressure low-temperature refrigerant flows to the indoor heat exchanger. This method needs to suspend the original heating mode to defrost, which greatly reduces the heating performance and efficiency of the heat pump unit.

[0003] In order to solve the above problems, a heat pump system is provided in the prior art. Two outdoor heat exchangers are provided, and the two outdoor heat exchangers are defrosted alternately to ensure that the heating function is maintained during defrosting. However, its structure Complicated and expensive

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