Air-conditioning system and defrosting method thereof
An air-conditioning system and an outdoor heat exchanger technology, applied in the field of air conditioners using heat pump compressors, can solve the problems of inability to completely defrost, decrease in pressure and temperature, and decrease in heat exchange efficiency between outdoor air and refrigerant, and facilitate industrialization The effect of simple processing and structure
Inactive Publication Date: 2012-12-12
俞绍明
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Problems solved by technology
And as time goes by, frost will freeze on the surface of the outdoor heat exchanger, reducing the heat exchange efficiency between the outdoor air and the refrigerant
In this case, in order to defrost from the outdoor heat exchanger, the traditional way is that the air conditioning system melts the frozen frost on the surface of the outdoor heat exchanger by making the outdoor heat exchanger perform the opposite operation of the refrigeration cycle, this refrigeration The method of defrosting the agent only enters the heat exchanger from one end, making the defrosting uneven
Moreover, with the improvement of people's energy-saving requirements for air-conditioning systems, in recent years, the outdoor heat exchanger has been improved from the traditional tubular structure to a multi-microporous multi-channel integrally formed to improve the heat exchange between the outdoor heat exchanger and the refrigerant. Efficiency, in this environment, such as using the above-mentioned traditional method, will make the outdoor heat exchanger perform the opposite operation of the refrigeration cycle to melt the frozen frost on the surface of the outdoor heat exchanger, when the refrigerant passes through the outdoor heat exchanger When one port flows to the other port, because the refrigerant passes through the microporous and multi-channel structure inside the external heat exchanger, the pressure and temperature drop greatly, and the other end cannot completely defrost, so the defrosting effect is not obvious
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[0030] In order to enable those skilled in the art to fully understand the idea of the present invention, the following description will be made in conjunction with specific embodiments.
[0031] image 3 and Figure 4 They are system structure diagrams of the air conditioning system provided by the present invention in cooling mode and heating mode respectively.
[0032] Such as image 3 and Figure 4 shown. The air-conditioning system includes a compressor 1 , an outdoor heat exchanger 5 , an indoor heat exchanger 3 , a reversing valve 2 , an expansion valve 4 and piping components 6 . The pipeline piece 6 connects the above components in an appropriate way to form a refrigerant passage; the reversing valve 2 controls the flow direction in the refrigerant passage by switching; the expansion valve 4 acts as a throttling element by adjusting its throttle The size is used to control the fluid velocity in the refrigerant passage to achieve throttling; the outdoor heat exc...
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The invention relates to an air-conditioning system and a defrosting method thereof, belonging to the technical field of refrigeration control. The air-conditioning system comprises at least one air compressor (1), at least one outdoor heat exchanger (5), at least one indoor heat exchanger (3), a reversing valve (2), a throttling device and pipelines, wherein the throttling device is arranged between the outdoor heat exchanger (5) and the indoor heat exchanger (3); and the pipelines are used for connecting the parts. The air-conditioning system provided by the invention is characterized in that the air-conditioning system also comprises a defrosting channel (7) connected between the indoor heat exchanger and the outdoor heat exchanger. The defrosting method comprises the following steps: a refrigerant enters a first port of the outdoor heat exchanger (5) from the air compressor (1) and carries out defrosting on one side of the outdoor heat exchanger (5) close to the first port; and (2) the refrigerant enters a second port of the outdoor heat exchanger (5) from the defrosting channel and carries out defrosting on one side of the outdoor heat exchanger (5) close to the second port. The air-conditioning system and the defrosting method thereof provided by the invention has the advantages that the heat exchanger at one side of an expansion valve can be partially defrosted, and the condition of a non-uniform defrosting effect of the traditional method is avoided.
Description
technical field [0001] The invention belongs to the technical field of refrigeration control, and relates to an air conditioning system and a defrosting method thereof, in particular to an air conditioner using a heat pump compressor Background technique [0002] figure 1 and figure 2 They are respectively the system structure diagrams of the air conditioning system in the prior art in cooling mode and cooling mode. A heat pump compressor air-conditioning system generally consists of a compressor 1, an outdoor heat exchanger 5', an indoor heat exchanger 3, a reversing valve 2, and an expansion valve 4. The air conditioning system is used to keep the temperature of the internal space higher than or lower than the outdoor temperature, and its reversing valve 2, such as a four-way reversing valve, can selectively perform a refrigeration cycle or a heating cycle as required. [0003] Meanwhile, if a domestic air conditioner for heating or cooling performs a heating mode unde...
Claims
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IPC IPC(8): F25B47/02F25B41/06
Inventor 俞绍明
Owner 俞绍明