Air-conditioner and operation control method thereof

Abstract

An air-conditioner includes a small-capacity compressor and a large-capacity compressor for compressing a refrigerant to a high temperature high pressure gaseous refrigerant; a valve for connecting a suction opening of a refrigerant channel of the large-capacity compressor and a discharge passage of a refrigerant channel of the large-capacity compressor; and a controller for controlling the small-capacity compressor, the large-capacity compressor and the valve.

Description

BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to an air-conditioner and, more particularly, to a method for controlling an operation of the air-conditioner. [0003] 2. Description of the Background Art [0004] In general, an air-conditioner includes a compressor for compressing a low temperature low pressure gaseous refrigerant to a high temperature high pressure gaseous refrigerant; a condenser for changing the high temperature high pressure gaseous refrigerant after being compressed in the compressor into middle temperature high pressure liquid-state refrigerant; an electronic expansion Is valve for changing the middle temperature high pressure liquid-state refrigerant to low temperature low pressure liquid-state refrigerant; an evaporator for changing the low temperature low pressure liquid-state refrigerant to a gaseous refrigerant; and a four-way valve for changing a channel of the refrigerant according to a cooling mode or heat...

AI Technical Summary

Benefits of technology

[0013] Therefore, one object of the present invention is to provide an air-conditioner capable of enhancing load coping capability by shortening time to make a pressure of a discharge passage of a large-capacity compressor and a pressure of a suction opening of the large-capacity compressor equal before the large-capacity compressor is started for operation while a small-capacity compressor is being operated.

Problems solved by technology

However, in the conventional air-conditioner, when the compressor is stopped from operation, the pressure at the discharge passage and the pressure at the suction opening will not be quickly balanced but be slowly equal due to oil and the refrigerant inside the compressor, causing a problem of platen pressure problem, and maximum 30 minutes are taken until the pressure of the suction opening and the pressure of the discharge passage are the same.

Thus, in the conventional compressor and the method for controlling the operation of the compressor, after the small-capacity compressor is operated, when the large-capacity compressor is actuated, it cannot be immediately actuated due to the platen pressure problem in the can of the large-capacity compressor.

Therefore, the capability of coping with a load of the air-conditioner deteriorates.

Images