Defrosting method for air conditioner

Abstract

The invention discloses a defrosting method and a defrosting system for an air conditioner. The defrosting method comprises the following steps of: 10, electrifying the air conditioner for running and heating; 20, judging, namely (A) judging whether the outdoor environmental temperature is smaller than and equal to first preset temperature, (B) judging whether continuous running time of a heating compressor reaches first preset time, and judging whether accumulative running time reaches second preset time, (C) judging whether the continuous running time of the heating compressor reaches third preset time, and making accumulative running time reach fourth preset time, (D) judging whether the temperature of a defrosting sensor Te or Tc is smaller tan and equal to second preset temperature, keeping the temperature for fifth preset time, and making the accumulative running time reach fifth preset time, and (E) judging whether to defrost manually; and 30, determine to perform timing defrost, automatically defrost, manually defrost or not defrost according to a judging result obtained in the step 20. By the scheme, the problems that when the air conditioner is used for heating, a heating effect is influenced due to a relatively long defrosting period, and the air conditioner cannot defrost, or defrosts after a long time because the environmental temperature is relatively low can be solved.

Description

technical field [0001] The present invention relates to a defrosting method and a defrosting system thereof, more specifically, to an air conditioner defrosting method. Background technique [0002] When the air conditioner is in heating operation, when frost forms on the condenser but does not reach the defrosting condition in a short time, or when the air conditioner is heating in a low-temperature environment, that is, below 7°C, the air conditioner does not enter defrosting or takes a long time At this time, due to the thick frost on the condenser, the heat exchange effect of the condenser is poor, and people will feel uncomfortable. [0003] For the prior art, a defrosting sensor is generally used for control, and when the defrosting sensor reaches a specified temperature value, the machine enters into defrosting. If the defrost sensor is used to control the defrosting of the air conditioner, the following situations of inaccurate control will occur: [0004] 1. If th...

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Problems solved by technology

[0008] In order to solve the above problems, the object of the present invention is to provide an air conditioner defrosting method and its defrosting system, the method can perform manual defrosting, timing defrosting or automatic defrosting, and solve the defrosting cycle of the air conditioner when heating. If it is too long, it will affect the heating effect, or when the resistance value of the defrosting sensor is inaccurate or broken, the air conditioner will defrost without frosting or the air conditioner will not defrost because of the thick frosting, and the ambient temperature is low, the air conditioner The problem of not entering defrosting or entering defrosting for a long time can improve the heating effect

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