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Defrosting method of air conditioner

A technology of air conditioner and defrost time, which is applied in the field of air conditioner defrost, which can solve problems affecting heating performance, avoid false defrost phenomenon and improve defrost efficiency

Active Publication Date: 2014-06-04
ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a defrosting method for air conditioners to solve the problem of false defrosting and affecting heating performance in the prior art

Method used

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  • Defrosting method of air conditioner

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Embodiment Construction

[0016] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways defined and covered by the claims.

[0017] Such as figure 1 As shown, the present invention provides an air-conditioning defrosting method, which can be used for the defrosting control of the central air-conditioning in the heating process. The defrosting method includes the following steps:

[0018] Step 1, collect ambient temperature, ambient humidity and fin temperature. Preferably, an ambient temperature sensor, an ambient humidity sensor, and a fin temperature sensor may be used to respectively collect the ambient temperature, ambient humidity, and fin temperature.

[0019] Step 2, calculate the dew point temperature corresponding to the ambient temperature and ambient humidity, and judge whether the fin meets the conditions for frosting according to the relationship between th...

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Abstract

The invention relates to a defrosting method of an air conditioner. The defrosting method includes the following steps that firstly, environment temperature, environment humidity and fin temperature are acquired; secondly, dew-point temperature corresponding to the environment temperature and the environment humidity is calculated, and whether fins meet the defrosting condition or not is judged according to the relation between the fin temperature and the dew-point temperature, if yes, the third step is executed, if not, the first step is executed again; thirdly, suction pressure is acquired, evaporation temperature corresponding to the suction pressure and the change rate of the evaporation temperature are calculated, if the change rate is larger than a preset change rate, defrosting is started, and if the change rate is not larger than the preset change rate, the third step continues to be executed. The defrosting method has the advantages that the change rate of the evaporation temperature of a heat exchanger on the air side in the heating process is used as the condition for judging whether defrosting is conducted or not, false defrosting of a unit is avoided, defrosting efficiency is improved, and heating capacity of the air cooling heat pump unit is exerted.

Description

technical field [0001] The invention relates to the field of air conditioners, in particular to an air conditioner defrosting method. Background technique [0002] During the heating operation of the air-cooled heat pump unit of the central air conditioner in winter, when the fin temperature of the heat exchanger on the air side is lower than the dew point temperature of the atmosphere and lower than 0 degrees (it will vary according to the change of the regional atmospheric pressure), The heat exchanger will frost. As the thickness of the frost layer becomes thicker, the spacing between the fins becomes smaller and smaller, which will cause the wind resistance of the heat exchanger to increase and the wind speed to decrease, resulting in the heating capacity of the air-cooled heat pump unit worse. Therefore, in the heating process, defrosting control logic needs to be added to improve the heating performance of the air-cooled heat pump unit. [0003] In the prior art, th...

Claims

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Application Information

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IPC IPC(8): F25B47/00F24F11/00
Inventor 吴伟军钟建法何跃智
Owner ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT
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