| 摘要 |
PROBLEM TO BE SOLVED: To reuse a liquid refrigerant in an accumulator.SOLUTION: A heat pump 10 includes: an accumulator 42 for separating a liquid refrigerant from a gaseous refrigerant returned to a compressor 16; a refrigerant suction flow passage 74 for connecting the compressor 16 with the accumulator 42; a refrigerant return flow passage 76 for returning the liquid refrigerant of the accumulator 42 to the refrigerant suction flow passage 74; a first valve 62 provided in the refrigerant return flow passage 76; a temperature sensor 80 for detecting a temperature of the refrigerant on the compressor side of a merging point between the refrigerant suction flow passage 74 and the refrigerant return flow passage 76; a second valve 70 for decompressing part of the liquid refrigerant flowing in a refrigerant flow passage between first and second heat exchangers 18, 22; a refrigerant evaporator 64 for gasifying the decompressed liquid refrigerant by using waste heat of an engine 24; a gaseous refrigerant supply flow passage 78 for supplying the gasified refrigerant to the accumulator 42; and a control device for controlling an opening of the second valve 70 on the basis of a temperature detected by the temperature sensor 80 while the first valve 62 is opened.SELECTED DRAWING: Figure 1 |
