Defrosting method of air conditioner

Abstract

A defrosting method of an air conditioner is disclosed. The air conditioner has an indoor unit having an indoor heat-exchanger, an indoor blower fan, an auxiliary heater, an outdoor unit having an outdoor heat-exchanger, a compressor, an expansion device, and an outdoor blower fan, and a four-way valve to selectively switch a circulation direction of a refrigerant between the indoor unit and the outdoor unit such that the air conditioner is operated in a heating cycle when the four-way valve is turned off and the air conditioner is operated in a refrigerating cycle when the four-way valve is turned on. The defrosting method is selectively determined according to the number of the heating cycles of the air conditioner.

Description

[0001]This application claims the benefit of Korean Patent Application No. 10-2005-0127973, filed on Dec. 22, 2005, which is hereby incorporated by reference as if fully set forth herein.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The present invention relates to a defrosting method of an air conditioner, and more particularly, to a defrosting method of an air conditioner of effectively removing frost generated in pipes of an outdoor heat-exchanger by changing defrosting operation in a heating cycle.[0004]2. Discussion of the Related Art[0005]Generally, an air conditioner has a refrigerating cycle in which refrigerant circulates in the order of compression, condensing, expansion, and evaporation to transfer heat. Due to this refrigerating cycle, the air conditioner works in a refrigerating cycle in which indoor heat is discharged to the outdoor in summer season and serves as a heat pump in which the refrigerant circulates in a direction opposite to the direction ...

AI Technical Summary

Benefits of technology

[0014]An object of the present invention is to provide a defrosting method of an air conditioner of effectively removing frost generated on pipes of an outdoor heat-exchanger by changing defrosting operation according to a heating cycle.

Problems solved by technology

Due to the lowered surface temperature, on the surface of the heat-exchanger of the outdoor unit, frost is generated so that the efficiency of the heat-exchanger of the outdoor unit is deteriorated.

Thus, when the temperature of the outdoor heat-exchanger is equal to or less than the predetermined temperature, the defrosting operation is frequently carried out regardless of the number of operation of the air conditioner in the heating cycle so that the heating efficiency of the air conditioner is deteriorated.

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