Integration valve

摘要

A vapor-liquid separating space is provided in a body. The body houses a fixed throttle-decompressing liquid-phase refrigerant, and an integration valve member selectively opening or closing a liquid-phase refrigerant passage and a vapor-phase refrigerant passage. The integration valve member is moved by a stepping motor connected to the integration valve member via a shaft. Accordingly, a cycle configuration of a heat pump cycle working as a gas injection cycle can be simplified.

主权项

1. An integration valve used for a heat pump cycle, which is capable of working as a gas injection cycle and includes (i) a compressor, which decompresses refrigerant drawn from a suction port, discharges high-pressure refrigerant from a discharge port, and has an intermediate-pressure port drawing intermediate-pressure refrigerant in the cycle and mixing the intermediate-pressure refrigerant with refrigerant being decompressed, (ii) a using-side heat exchanger, in which a heat-exchange fluid exchanges heat with the high-pressure refrigerant discharged from the discharge port so as to be heated, (iii) a high-stage-side decompressor decompressing high-pressure refrigerant flowing out of the using-side heat exchanger to be intermediate-pressure refrigerant, and (iv) an evaporator evaporating low-pressure refrigerant in the cycle, and causing the evaporated low-pressure refrigerant to flow to the suction port, the integration valve comprising:
a body having (i) a refrigerant inlet port through which the intermediate-pressure refrigerant decompressed at the high-stage-side decompressor flows, (ii) a vapor-liquid separating space separating refrigerant flowing out of the refrigerant inlet port into vapor-phase refrigerant and liquid-phase refrigerant, (iii) a vapor-phase refrigerant outlet port through which the vapor-phase refrigerant separated in the vapor-liquid separating space flows to a side of the intermediate-pressure port, and (iv) a liquid-phase refrigerant outlet port through which the liquid-phase refrigerant separated in the vapor-liquid separating space flows to a side of the evaporator; an integration valve member disposed in the body, and opening or closing (i) a liquid-phase refrigerant passage extending from the vapor-liquid separating space to the liquid-phase refrigerant outlet port and (ii) a vapor-phase refrigerant passage extending from the vapor-liquid separating space to the vapor-phase refrigerant outlet port; and a drive device connected to the integration valve member via a drive mechanism and operating the integration valve member, wherein the drive device operates and moves the integration valve member to close the vapor-phase refrigerant passage when the liquid-phase refrigerant passage is open so that liquid-phase refrigerant flows toward a side of the liquid-phase refrigerant outlet port; and the drive device operates and moves the integration valve member to be displaced so that liquid-phase refrigerant flowing to the side of the liquid-phase refrigerant outlet port is decompressed when the vapor-phase refrigerant passage is open and passes vapor-phase refrigerant so as to flow to a side of the vapor-phase refrigerant outlet port.