| 摘要 |
PROBLEM TO BE SOLVED: To provide an automobile air-conditioning device able to regulate a refrigerant flow rate by using an expansion valve while using a condenser in a room as a radiator during heating and as a heat absorber during cooling. SOLUTION: This automobile air-conditioning device comprises an expansion valve 61 to convert a high pressure liquid refrigerant to a low pressure liquid refrigerant and regulate a flow rate of a circulating refrigerant; and a flow passage switching means 60 to switch a flow passage for a refrigerant fed through a bypass passage 53 or a main condenser 52. In this case, during heating operation, a refrigerant is caused to flow through, in order, a subcondenser 56, an expansion valve 61, and an evaporator 57 by the flow passage switching means 60 and during cooling operation, the refrigerant is caused to flow through, in order, the expansion valve 61, the evaporator 57, and the subcondenser 56. Further, it is preferable that the flow direction of the refrigerant flowing through the subcondenser 56 is reversed between a heating operation time and a cooling operation time.
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