Heat pump air-conditioning system and control method thereof

A heat pump air conditioner and control method technology, applied in the field of air conditioners, can solve the problems of large indoor temperature drop, reduced indoor comfort, etc., and achieve the effects of large evaporation temperature difference, reduction of volume and cost, and slowing down of frost formation.

Active Publication Date: 2018-06-08
GREE ELECTRIC APPLIANCES INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the indoor temperature drops greatly during the defrosting of the refrigerant reverse cycle, which leads to the reduction of indoor comfort, so as to provide a heat pump air conditioning system and its control method

Method used

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  • Heat pump air-conditioning system and control method thereof
  • Heat pump air-conditioning system and control method thereof

Examples

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Effect test

Embodiment 1

[0041] Such as figure 1 As shown, the at least one indoor heat exchanger includes a first indoor heat exchanger 15 and a second indoor heat exchanger 16, and the first indoor heat exchanger 15 and the second indoor heat exchanger 16 are placed side by side to achieve different The evaporation temperature or the condensation temperature, the different evaporation temperatures can form a cascade cooling of the indoor air, or the different condensation temperatures can form a cascade heating of the indoor air. The at least one outdoor heat exchanger includes a first outdoor heat exchanger 10, the at least one bypass pipeline includes a first bypass pipeline 14, and one end of the first bypass pipeline 14 is connected to the compressor 1, the other end is connected to the first outdoor heat exchanger 10; the first outdoor heat exchanger 10 communicates with the compressor through the first four-way valve 8 and the second four-way valve 9 1 connection; the first bypass line 14 is...

Embodiment 2

[0046] Such as figure 2 As shown, the at least one indoor heat exchanger includes a first indoor heat exchanger 15 and a second indoor heat exchanger 16, and the first indoor heat exchanger 15 and the second indoor heat exchanger 16 are placed side by side to achieve different The evaporation temperature or the condensation temperature, the different evaporation temperatures can form a cascade cooling of the indoor air, or the different condensation temperatures can form a cascade heating of the indoor air. The at least one outdoor heat exchanger includes a first outdoor heat exchanger 10, the at least one bypass line includes a first bypass line 14, and the first indoor heat exchanger 15 and the second indoor heat exchanger A flasher 19 is arranged between the heat exchangers 16; the flasher 19 is connected to the first four-way valve 8 through the first connecting pipe 20 and then connected to the compressor 1; the flasher 19 is connected to the compressor 1 through the sec...

Embodiment 3

[0051] Such as image 3 As shown, the at least one outdoor heat exchanger includes a first outdoor heat exchanger 10 and a second outdoor heat exchanger 102; the first indoor heat exchanger 10, the first outdoor heat exchanger 12 and the The compressor 1 forms a first circulation loop 31, the second indoor heat exchanger 102, the second outdoor heat exchanger 16 and the compressor 1 form a second circulation loop 32, and the at least one bypass pipeline Including two bypass pipelines; the first circulation circuit 31 is provided with a first bypass pipeline 14, and the second circulation circuit 32 is provided with a second bypass pipeline 24, so that the first circulation The circuit 14 and the second circulation circuit 24 can perform defrosting alternately.

[0052] The first indoor heat exchanger 15 is connected to the first outdoor heat exchanger 10 through a first throttling device 12 , and the connection between the second indoor heat exchanger 16 and the second outdoo...

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Abstract

The invention provides a heat pump air-conditioning system and a control method thereof. The heat pump air-conditioning system comprises a compressor (1), at least one outdoor heat exchangers, a firstindoor heat exchanger (15), a second indoor heat exchanger (16), and at least one by-pass lines arranged between the compressor (1) and at least one outdoor heat exchangers; the effluent air of an air cylinder of the compressor (1) is bypassed into at least one outer heat exchangers through the by-pass lines, so that the defrosting of at least one outdoor heat exchangers can be carried out. According to the heat pump air-conditioning system and the control method thereof, when the outdoor heat exchanger is defrosted, the indoor heat exchanger still has some hot air passing through, thereby preventing cold air from entering the room.

Description

technical field [0001] The invention belongs to the technical field of air conditioning, and in particular relates to a heat pump air conditioning system and a control method thereof. Background technique [0002] Traditional single-temperature air-conditioning systems usually use double-row or multi-row heat exchangers for outdoor units. In the heat pump operation mode, the evaporation temperature of the refrigerant along the air flow direction is the same, and the air near the windward side has a large moisture content, resulting in the first frost layer. Accumulates on the windward side, degrading system performance. [0003] Such as Figure 4 As shown, the conventional refrigeration and air-conditioning system generally realizes the reverse cycle defrosting of the refrigerant through the four-way valve. However, in this defrosting mode, the indoor heat exchanger becomes an evaporator, and the indoor fan must be turned off to prevent cold wind from blowing in. During thi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B13/00F25B47/02F25D21/00
Inventor 吕如兵方金升郑波
Owner GREE ELECTRIC APPLIANCES INC
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