Defrosting control method for heat pump air conditioner

A technology of heat pump air conditioner and control method, which is applied in the direction of heating mode, heating and ventilation control system, refrigerator, etc., can solve the problem of inaccurate defrosting time of air conditioner, so as to save power consumption, avoid false defrosting, and guarantee The effect of using the effect
CN101451779AInactive Publication Date: 2009-06-10HAIER GRP CORP +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
HAIER GRP CORP
Publication Date
2009-06-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a method for controlling defrosting of a heat pump air-conditioner, comprising the following steps: 1) dividing outdoor environment temperatures into a plurality of stages; 2)setting a plurality of outdoor heat exchanger temperature ranges corresponding to each outdoor environment temperature stage; wherein each temperature range is corresponding to a predetermined cumulative time standard length; 3) calculating the total of the time when the outdoor heat exchanger temperature is within the range of each outdoor heat exchanger temperature; 4) calculating the quotient of the time calculated in step 3) and the corresponding cumulative time standard length set in step 2); 5) calculating the sum of the quotient of the total of the time when the outdoor heat exchanger temperature is within the range of each outdoor heat exchanger temperature calculated in step 3) and the corresponding cumulative time standard length, to obtain accumulated calculation coefficient; and 6)when the accumulated calculation coefficient is more than or equal to 1, starting the defrosting operation. The inventive method for controlling defrosting of the heat pump air-conditioner is used for solving the technical problem that the air-conditioner defrosting starting time is not accurate in prior art.
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Description

technical field

[0001] The invention relates to a defrosting method for an air conditioner, in particular to a defrosting control method and system for an air-cooled heat pump air conditioning system. Background technique

[0002] The outdoor air-cooled heat pump air-conditioning system is easy to frost on the outdoor condenser when heating at low temperature, which makes the heat exchange effect on the outdoor side worse, which leads to the worsening of the indoor heating effect of the system. When the frosting reaches a certain level, the heating effect of the indoor mechanism will become very poor, and even cold wind will be blown. At this time, it is necessary to remove the frost formed on the outdoor condenser to restore the heat exchange effect on the outdoor side and improve the heating effect of the indoor unit.

[0003] At present, the air-cooled heat pump air-conditioning system generally switches to cooling mode through the four-way valve reversing to defrost the...

Claims

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