| 摘要 |
PROBLEM TO BE SOLVED: To provide an air conditioner capable of increasing a ratio of an input quantity of electricity of a compressor for use to melt frost formed onto an outdoor heat exchanger during a hot-gas-bypass-based defrosting operation, and realizing shorter defrosting operation time. ! SOLUTION: In a defrosting operation, a microcomputer 19 of an air conditioner 100 maintains a four-way valve 11 in a heating operation state, an indoor expansion valve 41 in a closed state, an outdoor expansion valve 13 in a closed state, and a defrosting solenoid valve 23 in an open state, passes refrigerant discharged from a compressor 10 through a bypass pipe 22 so that the refrigerant flows into an outdoor heat exchanger 12, and sets the opening of a superheating expansion valve 25 to a predetermined opening to pass the refrigerant flowing in a pipe 33 through superheating pipes 26 to 28 so that the refrigerant flows into a pipe 34. ! COPYRIGHT: (C)2015,JPO&INPIT |
