초록 ▼

An air conditioner has a refrigeration circuit formed by sequentially connecting a compressor 1, a condenser 2, an electronic expansion valve 4 and an evaporator 7 by pipes (6, 10). A compressor bypass pipe 12 is provided to connect an outlet of the evaporator 7 with an inlet of the condenser 2. A f

An air conditioner has a refrigeration circuit formed by sequentially connecting a compressor 1, a condenser 2, an electronic expansion valve 4 and an evaporator 7 by pipes (6, 10). A compressor bypass pipe 12 is provided to connect an outlet of the evaporator 7 with an inlet of the condenser 2. A first on-off valve 11 is located in the bypass pipe 12. The air conditioner is controlled to switch to either a forced circulation operation or a natural circulation operation. In the forced circulation operation, the first on-off valve 11 is closed, the expansion valve 4 is opened to a first degree to allow refrigerant to pass therethrough, and the compressor 1 is operated in a running state. In the natural circulation operation, the first on-off valve 11 is opened, the expansion valve 4 is opened to a second degree, different from the first degree, to allow refrigerant to pass therethrough, and the compressor 1 is stopped.

대표청구항 ▼

[ What is claimed is:] [1.] An air conditioner, comprising:a refrigeration circuit formed by sequentially connecting a compressor, a condenser, an electronic expansion valve capable of controlling an opening degree thereof, and an evaporator by pipes;a compressor bypass pipe connecting an outlet of

[ What is claimed is:] [1.] An air conditioner, comprising:a refrigeration circuit formed by sequentially connecting a compressor, a condenser, an electronic expansion valve capable of controlling an opening degree thereof, and an evaporator by pipes;a compressor bypass pipe connecting an outlet of said evaporator and an inlet of said condenser interposing a first on-off valve;a controller which switches the air conditioner to:a forced circulation operation in which said first on-off-valve is closed, said expansion valve is opened to a first degree to allow refrigerant to pass therethrough, and said compressor is in a running state, ora natural circulation operation in which said first on-off valve is opened, said expansion valve is opened to a second degree, different from said first degree, to allow refrigerant to pass therethrough, and said compressor is in a stopping state.