REFRIGERATION CYCLE DEVICE AND PILOT ON-OFF VALVE

摘要

A pilot on-off valve in a refrigeration cycle device includes a main on-off valve that opens or closes a bypass passage through which a high-pressure side portion and a low-pressure side portion of a cycle communicate with each other, and a pilot valve that opens or closes a communication passage through which an inflow port and an outflow port of the pilot on-off valve communicate with each other. When the main on-off valve opens the bypass passage, the pilot valve opens the communication passage in a state where a refrigerant passage, in which a refrigerant flowing out of the pilot on-off valve flows, is closed.

主权项

1. A refrigeration cycle device comprising:
a compressor that compresses and discharges a refrigerant; a depressurizing device that depressurizes a high-pressure refrigerant discharged from the compressor; a bypass passage connecting a portion of a cycle, which extends from a discharge port side of the compressor to an inlet side of the depressurizing device and a portion of the cycle, which extends from an outlet side of the depressurizing device to a suction port side of the compressor; a pilot on-off valve that opens or closes the bypass passage; and a downstream open-close device that opens or closes a refrigerant passage through which a refrigerant flowing out of the pilot on-off valve passes, wherein the pilot on-off valve includes an inflow port into which a refrigerant flows, and an outflow port from which a refrigerant flows out, the pilot on-off valve includes a main on-off valve that opens the bypass passage when a pressure difference between a refrigerant pressure in the inflow port and refrigerant pressure in the outflow port becomes lower than or equal to a predetermined reference pressure difference, and a pilot valve that opens or closes a communication passage through which the inflow port and the outflow port communicate with each other, and when the main on-off valve opens the bypass passage, the pilot valve opens the communication passage in a state where the downstream open-close device closes the refrigerant passage.