Heat pump
An outdoor unit of the heat pump includes a compressor, an oil separator provided in a discharge path of the compressor, an outdoor-unit connecting pipe connecting an intake path of the compressor and an outdoor unit of an another heat pump for supplying a refrigerant to the outdoor unit of the another heat pump, an oil supply pipe extending from a predetermined position of the oil separator and connecting to the outdoor-unit connecting pipe, an on-off valve provided on the oil supply pipe, an expansion valve provided in a portion of the outdoor-unit connecting pipe between a connecting part connected to the intake path and a connecting part connected to the oil supply pipe, and a refrigerant filling port provided in a portion of the outdoor-unit connecting pipe between the connecting part and the expansion valve.
1. A heat pump system comprising;
a first heat pump; and
a second heat pump,
wherein the first heat pump includes a first outdoor unit, the first outdoor unit including:
a compressor,
an oil separator provided in a discharge path of the compressor,
an outdoor-unit connecting pipe connecting an intake path of the compressor and a second outdoor unit of the second heat pump for supplying a refrigerant to the second outdoor unit of the second heat pump,
an oil supply pipe extending from a predetermined position of the oil separator to the outdoor-unit connecting pipe,
an on-off valve provided on the oil supply pipe,
a first expansion valve provided in a portion of the outdoor-unit connecting pipe between a first connecting part connected to the intake path and a second connecting part connected to the oil supply pipe, and
a refrigerant filling port provided in a portion of the outdoor-unit connecting pipe between the second connecting part and the first expansion valve.
2. A heat pump system comprising;
a first heat pump; and
a second heat pump,
wherein the first heat pump includes a first outdoor unit and a first indoor unit, the first outdoor unit including:
a compressor,
an oil separator provided in adischargepathofthe compressor,
a refrigerant filling pipe connected to an intake path of the compressor and a second outdoor unit of the second heat pump for filling the intake path of the compressor with a refrigerant supplied from the second outdoor unit of the second heat pump,
an oil supply pipe extending from a predetermined position of the oil separator and connecting to the refrigerant filling pipe,
an on-off valve provided on the oil supply pipe,
an expansion valve provided in a portion of the refrigerant filling pipe between a first connecting part connected to the intake path and a second connecting part connected to the oil supply pipe, and
a refrigerant filling port provided in a portion of the refrigerant filling pipe between the second connecting part connected to the oil supply pipe and the expansion valve.
3. The heat pump system of claim 2 , wherein the refrigerant filling pipe is further configured to supply the refrigerant to the second outdoor unit of the second heat pump.
4. The heat pump system of claim 1 , wherein the oil supply pipe is configured to provide oil from the oil separator to the second heat pump via the outdoor-unit connecting pipe.
5. The heat pump system of claim 1 , wherein the first connecting part is an intersection of the outdoor-unit connecting pipe and the intake path.
6. The heat pump system of claim 5 , wherein the second connecting part is an intersection of the outdoor-unit connecting pipe and the oil supply pipe.
7. The heat pump system of claim 6 , wherein the first connecting part is disposed between a heat exchanger provided on the intake path and a second expansion valve provided on the intake path.
8. The heat pump system of claim 1 , further comprising a connecting pipe that connects the outdoor-unit connecting pipe to the second outdoor unit.
9. The heat pump system of claim 8 , further comprising a manual on-off valve provided on the outdoor-unit connecting pipe between the refrigerant filling port and the connecting pipe.