Method for controlling heat pump air-conditioning defrosting

A heat pump air conditioner and control method technology, which is applied to heating methods, heating and ventilation control systems, refrigerators, etc., can solve the problem of increasing the resistance of air flowing through heat exchangers, poor heat exchange effect of outdoor heat exchangers, and poor heating effect. and other problems, to achieve the effect of long heating operation time, improving heating effect and short heating operation time

Active Publication Date: 2014-01-29
AUX AIR CONDITIONING LTD BY SHARE LTD
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] When the air conditioning system is in heating operation, the outdoor heat exchanger acts as an evaporator to absorb heat from the outdoor environment, and its evaporation temperature is lower than the outdoor ambient temperature. When the evaporation temperature is lower than the freezing point of the outdoor environment, the water vapor in the air will The surface of the heat exchanger condenses and frosts. The frosting of the heat exchanger will increase the resistance of the air flowing through the heat exchanger and reduce the air flow. The frosting of the heat exchanger will also increase the heat transfer resistance, which will reduce the outdoor temperature. The heat absorbed by the heat exchange will make the heating effect worse, so when the air conditioning system is in heating operation, if the outdoor heat exchanger frosts, it should be defrosted
[0003] The defrosting of the air conditioning system generally turns the air conditioner into cooling mode and turns off the indoor unit fan to defrost. During defrosting, the air conditioner cannot provide heat to the room and consumes power
In addition, the air conditioner defrosts too frequently and consumes too much electric energy for defrosting operation, which will also cause intermittent heating, room temperature fluctuations, and long-term non-defrosting, and the heat exchange effect of the outdoor heat exchanger is poor. It will also lead to poor heating effect

Method used

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  • Method for controlling heat pump air-conditioning defrosting

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Embodiment

[0020] Embodiment: The defrosting control method of a kind of heat pump air conditioner of this embodiment is as follows figure 1 As shown, in the heating operation, first set the compressor continuous operation time T n , when the compressor runs continuously for T n When the set value is reached, the air conditioning system enters the defrosting mode from the heating operation, and records the defrosting time t, the continuous running time of the compressor in the next cycle T n+1 It is determined according to the defrosting time t of the previous cycle, so as to determine the heating operation time.

[0021] Wherein, the defrosting time t is the time from when the compressor starts to defrosting to when the defrosting ends.

[0022] The defrosting mode is: the compressor of the air conditioning system and the internal and external fans stop running, and the four-way valve is powered off, and then the compressor is turned on for defrosting.

[0023] Compressor continuous ...

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Abstract

The invention discloses a method for controlling heat pump air-conditioning defrosting. According to the technical scheme, the continuous operation time Tn of a compressor is set firstly during heating, an air-conditioning system enters a defrosting mode when the continuous operation time Tn of the compressor reaches a set value, and then defrosting time t is recorded. The method for controlling heat pump air-conditioning defrosting is characterized in that the continuous operation time Tn+1, in the next cycle, of the compressor is determined according to the defrosting time t in the last cycle. The method for controlling heat pump air-conditioning defrosting can achieve reasonable defrosting and improve the heating effect of an air conditioner.

Description

technical field [0001] The invention relates to a method for defrosting an air conditioner, in particular to a method for controlling the defrosting of a heat pump air conditioner. Background technique [0002] When the air conditioning system is in heating operation, the outdoor heat exchanger acts as an evaporator to absorb heat from the outdoor environment, and its evaporation temperature is lower than the outdoor ambient temperature. When the evaporation temperature is lower than the freezing point of the outdoor environment, the water vapor in the air will The surface of the heat exchanger condenses and frosts. The frosting of the heat exchanger will increase the resistance of the air flowing through the heat exchanger and reduce the air flow. The frosting of the heat exchanger will also increase the heat transfer resistance, which will reduce the outdoor temperature. The heat absorbed by the heat exchange will make the heating effect worse. Therefore, when the air cond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B47/02F24F11/00
Inventor 龚磊应必业杨勇
Owner AUX AIR CONDITIONING LTD BY SHARE LTD
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