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Variable-frequency heat pump air conditioner and defrosting control method thereof

A control method and air conditioner technology, applied in the direction of mechanical equipment, etc., can solve problems such as adverse effects, and achieve the effects of reducing impact, saving energy consumption, and good defrosting effect

Active Publication Date: 2018-12-25
GREE ELECTRIC APPLIANCES INC
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Problems solved by technology

[0004] The present invention proposes a frequency conversion heat pump air conditioner and its defrosting control method to solve the adverse effect of defrosting at a fixed defrosting frequency in the prior art

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  • Variable-frequency heat pump air conditioner and defrosting control method thereof

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Embodiment Construction

[0034] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solution of the present invention will be described in detail below in conjunction with specific embodiments and accompanying drawings.

[0035] The present invention proposes a method for controlling defrosting of an inverter air conditioner. In the method, the frosting situation is judged according to the temperature of the liquid pipe of the outdoor heat exchanger before the defrosting starts, and the upper limit of the defrosting frequency is controlled according to the frosting situation; During the process, the change of defrosting frequency is controlled according to the temperature rise rate of the liquid pipe of the outdoor heat exchanger, and the change of defrosting frequency is adjusted relative to the entire defrosting process to improve the defrosting efficiency.

[0036] figure 1 It is a flowchart of the defrosting control method proposed ...

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Abstract

The invention discloses a variable-frequency heat pump air conditioner and a defrosting control method thereof. The defrosting control method comprises the following steps: step I of controlling an upper limit value of defrosting frequency according to a liquid tube temperature of an outdoor heat exchanger before defrosting starts; step II of controlling changes of the defrosting frequency according to liquid tube temperature rise speed of the outdoor heat exchanger in a defrosting process; and step III of keeping the current defrosting frequency to operate until exiting a defrosting operationmode when the liquid tube temperature of the outdoor heat exchanger is greater than or equal to a preset frequency-modulating stop temperature value P. The variable-frequency heat pump air conditioner can reasonably control defrosting frequency in a defrosting process of the air conditioner, reduces influences, on use comfort, of the defrosting process, and saves energy consumption during a defrosting period.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a frequency conversion heat pump air conditioner and a defrosting control method thereof. Background technique [0002] When the air conditioner is in heating operation, the refrigerant needs to absorb heat and evaporate in the outdoor heat exchanger. When the outdoor ambient temperature is relatively low and the humidity is relatively high, frost will form on the outdoor heat exchanger after a period of operation. Frosting will seriously affect the heating effect of the air conditioner. Therefore, it is necessary to defrost the outdoor heat exchanger every once in a while. At present, when the conventional inverter air conditioner is automatically defrosting, the compressor runs according to the set frequency. During the defrosting process, it directly increases to the set frequency at a fixed rate for defrosting operation. This defrosting method will cause damage to a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/64F24F11/42
Inventor 温祖恒黎俊魏峰贺秋
Owner GREE ELECTRIC APPLIANCES INC
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