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Air conditioner system and defrosting control method thereof

A control method and technology for air conditioners, applied in heating and ventilation control systems, heating and ventilation safety systems, refrigerators, etc., can solve problems such as insufficient opening, fin condensation, blockage of heat exchange channels, etc. The effect of improving comfort, increasing low-temperature heating capacity, and reducing the number of downtimes

Active Publication Date: 2014-01-01
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As the temperature of the outdoor heat exchanger drops, condensation will appear on the fins; and when the temperature of the outdoor heat exchanger drops to a certain level, frost will begin to form on the fins, and even ice may form, which will cause heat transfer The channel is blocked, so the heating effect is poor or even no heating
Especially when the micro-channel parallel flow heat exchanger is used as the outdoor heat exchanger, the frosting speed will be faster during operation, and the defrosting time will be longer. As a result, the refrigerant stays in the flat tube at the bottom, and the temperature of the refrigerant in the flat tube at the bottom is lower than that in other flat tubes, so the frost condensed in the flat tube at the bottom of the microchannel parallel flow heat exchanger is difficult to remove. thus affecting the heating effect

Method used

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  • Air conditioner system and defrosting control method thereof
  • Air conditioner system and defrosting control method thereof
  • Air conditioner system and defrosting control method thereof

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Embodiment Construction

[0054] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0055] refer to figure 1 , a micro-channel parallel flow heat exchanger air conditioner system is proposed. The air conditioner system includes an indoor unit and an outdoor unit. The indoor unit and the outdoor unit are connected through pipes to form a circuit. The refrigerant runs in the circuit to realize the indoor unit and the outdoor unit. Heat exchange, so as to achieve the purpose of cooling and heating of the air conditioner.

[0056] The indoor unit includes an indoor heat exchanger 3 and an indoor fan 4, and the inlet and outlet of the indoor heat exchanger 3 communicate with the outdoor unit through pipes. The outdoor unit includes a compressor 1 , a fo...

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Abstract

The invention discloses an air conditioner system. The air conditioner system comprises a compressor, a four-way valve, an indoor heat exchanger, a throttling part and an outdoor micro-channel parallel flow heat exchanger which are connected in sequence through pipes, the air conditioner system further comprises a bypass circuit and a controlling device, the controlling device controls the bypass circuit to be connected or controls the four-way valve, one end of the bypass valve is connected with an outlet pipe of the outdoor micro-channel parallel flow heat exchanger, and the other end of the bypass valve is connected with an outlet pipe of the outdoor micro-channel parallel flow heat exchanger. The controlling device is used for controlling the bypass circuit to be connected for bypass defrosting or controlling the four-way valve to be reversed for four-way valve tangential defrosting. The invention further discloses a defrosting control method of the air conditioner system. The bypass circuit is added in the air conditioner system and bypass defrosting is performed during low-temperature heating, so that low-temperature heating capacity is improved beneficially; meanwhile, shut-down times are decreased during defrosting, and defrosting efficiency of an air conditioner is improved.

Description

technical field [0001] The invention relates to the technical field of air conditioners, in particular to an air conditioner system and a defrosting control method thereof. Background technique [0002] When the air conditioner is heating, the indoor temperature is high and the outdoor temperature is low. As the temperature of the outdoor heat exchanger drops, condensation will appear on the fins; and when the temperature of the outdoor heat exchanger drops to a certain level, frost will begin to form on the fins, and even ice may form, which will cause heat transfer The channel is blocked, so the heating effect is poor or even no heating. Especially when the micro-channel parallel flow heat exchanger is used as the outdoor heat exchanger, the frosting speed will be faster during operation, and the defrosting time will be longer. As a result, the refrigerant stays in the flat tube at the bottom, and the temperature of the refrigerant in the flat tube at the bottom is lower...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/02F24F11/02
CPCF25B49/02F25B2313/02741F25B2313/0315F25B2400/19F25B2500/31F25B2600/01F25B2600/2501F25B2600/2507F25B13/00F25B47/022F24F11/30F24F11/42F24F11/62
Inventor 徐龙贵程志明汪剑波吕艳红
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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