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Method for controlling defrosting operation of air-conditioner

A technology of operation control and air conditioner, which is applied in the direction of control input involving air characteristics, space heating and ventilation control input, heating and ventilation control system, etc. It can solve the problems of attenuation of heating capacity and inability to flow outside the condenser, etc.

Inactive Publication Date: 2015-04-15
HAIER GRP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, because the structure of the microchannel is not conducive to the removal of condensed water, the condensed water will be blocked by the pipe during defrosting and cannot flow outside the condenser. In the next heating operation, the condensed water will turn into ice, which will reduce the heating capacity. Rapid decay, so the micro-channel heat exchanger can only be used in cold-only air conditioners

Method used

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  • Method for controlling defrosting operation of air-conditioner
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  • Method for controlling defrosting operation of air-conditioner

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Embodiment 1

[0031] like Figure 4 As shown, in this embodiment, a defrosting operation cycle is divided into multiple stages. In order to facilitate control and simplify the control program, it is preferable to divide the defrosting operation cycle by time, that is, to divide a defrosting operation cycle into multiple time periods, and multiple The times of the time segments are respectively T1, T2, T3, . . . , Tn.

[0032] A defrosting operation cycle is about 6-15 minutes, generally 9-10 minutes. Therefore, it is preferable to divide a defrosting operation cycle into two to five time periods from the beginning to the end, and it is best to divide it into three time periods to avoid As a result, the outdoor condensing fan 4 frequently reverses in a short period of time, and the three time periods are the first time period T1, the second time period T2 and the third time period T3.

[0033] Wherein, the condition to be satisfied in the setting of the first period T1 is to make all or at ...

Embodiment 2

[0048] The difference from Embodiment 1 is that the entire defrosting operation cycle is not divided into multiple time periods, but only at the end of defrosting, the outdoor condensing fan 4 is controlled to run in reverse at a high speed. The water will slide down along the condenser 3. At the end of defrosting, use the outdoor condensing fan 4 to run in reverse at a high speed to blow out the water that remains on the condenser 3 and cannot slide down at one time. In order to avoid frosting or condensation again in this process , the compressor 1 does not stop running, and the time for the reverse operation of the outdoor condensing fan 4 is not easy to be too long, and is limited within 10-50 seconds, preferably controlled between 15-30 seconds.

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Abstract

The invention relates to a method for controlling defrosting operation of an air-conditioner; when one defrosting operation period is completed or one defrosting operation period is divided into a plurality of stages, an outdoor condensate fan is controlled to operate reversely for a certain time t at the end of each stage and blows off defrosted water on a condenser. The method for controlling defrosting operation of the air-conditioner is particularly applicable to the air-conditioner with the condenser using a micro-channel special structure; the fan of the outdoor unit is utilized sufficiently; during the defrosting operation, the condensate fan of the outdoor unit is controlled to operate reversely within a short time and blows off the defrosted water on the condenser, so that the purpose of completely defrosting is achieved; and the method is also applicable to other air conditioners with finned tube type condensers.

Description

technical field [0001] The invention relates to an air conditioner, in particular to an air conditioner defrosting operation control method, which belongs to the technical field of air conditioners. Background technique [0002] Air conditioners are divided into cooling-only air conditioners and heat pump air conditioners according to their functions. Cooling-only air conditioners can only perform cooling operations, while heat pump air conditioners can perform both cooling and heating operations. The refrigerant circulation system of the heat pump air conditioner is mainly composed of a compressor, a four-way valve, a condenser, a condensing fan, a throttling element, an evaporator, and an evaporating fan. [0003] The cooling operation of the air conditioner is mainly that the high-temperature and high-pressure refrigerant gas discharged from the compressor passes through the four-way valve and enters the condenser. The refrigerant exchanges heat with the outdoor air in th...

Claims

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Application Information

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IPC IPC(8): F25B47/02F25B49/02F24F11/00
CPCF25B47/02F24F11/30F24F2110/00F24F2140/30F25B49/02
Inventor 王飞吴洪金樊明敬刘伟彤
Owner HAIER GRP CORP
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