| 摘要 |
The objective of the present invention is to provide a refrigeration device with which it is possible to prevent the backflow of liquid during pressure equalization in a refrigerant circuit when the refrigerant circuit is started up. An air-conditioning device (1) is equipped with a refrigerant circuit (2) formed by sequentially connecting a variable capacity type compressor (11), an outside heat exchanger (13), a first electric expansion valve (14), a receiver (15), a second electric expansion valve (16), and an indoor heat exchanger (17). The air-conditioning device (1) is equipped with a four-way changeover valve (12) and a control device (5). The four-way changeover valve (12) changes the flow direction of a refrigerant flowing in the refrigerant circuit (2). The control device (5) controls the open/closed state of the first electric expansion valve (14) and the second electric expansion valve (16). When the air-conditioning device (1) starts up, the control device (5) determines whether the first electric expansion valve (14) or the second electric expansion valve (16) is the high-pressure-side electric valve, that is, determines which valve is located in the high-pressure section of the refrigerant circuit (2), and then places the high-pressure-side electric valve in the fully open state. |
