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Air conditioner defrosting control method and device

A control method and technology for air conditioners, applied in mechanical equipment and other directions, can solve problems such as unclean defrosting of air conditioners, and achieve the effects of ensuring heating capacity and heating effect, avoiding fluctuations, and short defrosting time.

Active Publication Date: 2019-08-23
GD MIDEA AIR CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to solve the problem that the defrosting of the air conditioner in the prior art is not clean

Method used

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  • Air conditioner defrosting control method and device
  • Air conditioner defrosting control method and device
  • Air conditioner defrosting control method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Embodiment 1 of the present invention provides a defrosting control method for an air conditioner, such as figure 1 As shown, the air conditioner includes a compressor 1, an outdoor heat exchanger 2, an indoor heat exchanger 3, and a four-way reversing valve 5 connected through refrigerant pipelines. The outdoor heat exchanger 2 includes a plurality of parallel heat exchange Branches 21, each heat exchange branch 21 can be selectively communicated with the refrigerant pipeline.

[0047] Such as figure 2 As shown, the control method includes:

[0048] S0, the air conditioner enters the defrosting mode;

[0049] S1, select one of the heat exchange branches to be defrosted among the multiple parallel heat exchange branches of the outdoor heat exchanger to defrost, and the heat exchange branch in the defrost is connected with the refrigerant pipeline of the air conditioner , and the rest of the heat exchange branches are disconnected from the refrigerant pipeline; in th...

Embodiment 2

[0059] In the air conditioner defrosting control method provided by Embodiment 2 of the present invention, there are two heat exchange branches in the outdoor heat exchanger of the air conditioner, which are respectively the first heat exchange branch and the second heat exchange branch. The hot branch and the second heat exchange branch are connected to the refrigerant pipeline through the three-way valve 6; image 3 As shown, the control method includes steps:

[0060] S0', the air conditioner enters the defrosting mode;

[0061] S1', defrosting is performed on the first heat exchange branch, that is, the first heat exchange branch is connected to the refrigerant pipeline, and the second heat exchange branch is disconnected from the refrigerant pipeline;

[0062] S2', obtaining the actual pressure of the first heat exchange branch in real time;

[0063] S3', comparing the actual pressure of the first heat exchange branch with the preset pressure of the first heat exchange ...

Embodiment 3

[0073] Embodiment 3 of the present invention provides a defrosting control device for an air conditioner, which is characterized in that it includes a mode control module for controlling the air conditioner to start or end the defrosting mode;

[0074] The pipeline control module is used to select one of the heat exchange branches to be defrosted among the multiple parallel heat exchange branches of the outdoor heat exchanger for defrosting. At this time, the heat exchange branch in the defrosting The refrigerant pipeline of the air conditioner is connected, and the other heat exchange branches are disconnected from the refrigerant pipeline;

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Abstract

The invention relates to the technical field of air conditioning control, in particular to an air conditioner defrosting control method and device. The air conditioner defrosting control method comprises the steps that S0, an air conditioner enters a defrosting mode; S1, defrosting is conducted by selecting a to-be-defrosted heat exchange branch from a plurality of heat exchange branches connected in parallel, the defrosted heat exchange branch communicates with a refrigerant pipeline of an air conditioner, and the rest of the heat exchange branches are disconnected with the refrigerant pipeline; S2, the actual pressure of the defrosted heat exchange branch is obtained; S3, the actual pressure of the defrosted heat exchange branch is compared to the preset pressure of the heat exchange branch, if the actual pressure of the defrosted heat exchange branch is higher than the preset pressure of the heat exchange branch, defrosting is completed, and the step S4 is carried out, and otherwise, the step S2 is conducted; S4, whether a to-be-defrosted heat exchange branch exists is judged, if yes, the process returns to step S1, and if defrosting of all the to-be-defrosted heat exchange branches is completed, the step S5 is conducted; and S5, the defrosting mode of the air conditioner is stopped. Defrosting is thorough, and the defrosting speed is high.

Description

technical field [0001] The invention relates to the technical field of air conditioner control, in particular to an air conditioner defrosting control method and device. Background technique [0002] In the prior art, when the air-conditioning system is heating and running in a low-temperature environment, frost usually forms on the outdoor heat exchanger, which affects the efficiency of heat exchange. [0003] Medium and large air conditioners have many multi-channel heat exchangers, especially high-efficiency products. The displacement of the compressor is small, and the heat exchanger is large and has many channels. The problem of defrosting in the middle and lower parts of the heat exchanger is often not clean. At the beginning of defrosting, the high-temperature and high-pressure gaseous refrigerant and the frost of the heat exchanger form a violent heat exchange due to the temperature difference, but after 1 or 2 minutes, the refrigerant begins to stratify, and the hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24F11/42F24F11/64F24F11/65
Inventor 韦汉儒李嗣平王庆仙
Owner GD MIDEA AIR CONDITIONING EQUIP CO LTD
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