Accumulating/receiving device and heat pump system
The present disclosure provides an accumulating/receiving device for a heat pump system. The accumulating/receiving device includes a body, an inlet, a first outlet, and a second outlet. The body defines therein a space. The body is disposed downstream of an outside heat exchanger. The inlet is connected to the outside heat exchanger through a first conduit. The first outlet is connected to an inside heat exchanger through a second conduit. The second outlet is connected, through a bypass conduit, to a third conduit. A liquid of the refrigerant flows out of the body through the first outlet in a cooling mode. A vapor of the refrigerant flows out of the body through the second outlet in a heating mode.
1. A heat pump system for a vehicle, the heat pump system comprising:
a refrigerant loop through which a refrigerant circulates;
an inside heat exchanger that is disposed in a passenger compartment of the vehicle;
an outside heat exchanger that is disposed outside of the passenger compartment;
a compressor that circulates the refrigerant between the inside heat exchanger and the outside heat exchanger;
an accumulator/receiver device that is disposed downstream of the outside heat exchanger;
a first valve that is disposed upstream of the inside heat exchanger and downstream of the accumulator/receiver device;
a second valve that is disposed downstream of the accumulator/receiver device and upstream of the compressor;
an intermediate heat exchanger that is disposed directly downstream of the compressor and upstream of the outside heat exchanger; and
a controller that switches the heat pump system between a heating mode and a cooling mode by controlling the first valve and the second valve, wherein:
the refrigerant loop includes a first conduit connected to both the outside heat exchanger and the accumulator/receiver device, a second conduit connected to both the accumulator/receiver device and the inside heat exchanger, a third conduit connected to both the inside heat exchanger and the compressor, a fourth conduit connected to both the compressor and the outside heat exchanger, and a bypass conduit connected to the accumulator/receiver device and the third conduit to bypass the inside heat exchanger,
the first valve is disposed in the second conduit,
the second valve is disposed in the bypass conduit,
the intermediate heat exchanger is disposed in the fourth conduit and configured to transfer heat between the refrigerant loop and a coolant loop during the heating mode, and
the controller is configured to (i) control the first valve to close the second conduit and the second valve to open the bypass conduit during the heating mode and (ii) control the first valve to open the second conduit and the second valve to close the bypass conduit during the cooling mode.
2. The heat pump system according to claim 1 , further comprising
a sub-cooling heat exchanger that is disposed in the second conduit upstream of the first valve.
3. The heat pump system according to claim 1 , wherein
the first valve includes a thermal expansion portion and an on/off valve portion.
4. The heat pump system according to claim 1 , wherein
coolant circulates through the coolant loop; and
a heater core that is disposed in the passenger compartment of the vehicle.
5. The heat pump system according to claim 1 , further comprising:
a battery chiller;
a first chiller conduit;
a second chiller conduit; and
a third valve that is disposed upstream of the battery chiller, wherein
the first chiller conduit is branched off from the second conduit and connected to the battery chiller,
the second chiller conduit is connected to both the third conduit and the battery chiller,
the third valve is disposed in the first chiller conduit, and
the controller controls the third valve to open the first chiller conduit during the cooling mode and to close the first chiller conduit during the heating mode.
6. The heat pump system according to claim 5 , wherein
the third valve includes a thermal expansion portion and an on/off valve portion.
7. The heat pump system according to claim 1 , further comprising
an expansion device that is disposed in the fourth conduit between the intermediate heat exchanger and the outside heat exchanger.
8. The heat pump system according to claim 7 , wherein
the expansion device is an orifice.
9. The heat pump system according to claim 7 , wherein
the expansion device is an electronic expansion valve.
10. The heat pump system according to claim 1 , wherein
the accumulator/receiver device includes:
a body that defines therein a space to store the refrigerant;
an inlet that is connected to the first conduit;
a first outlet that is connected to the second conduit; and
a second outlet that is connected to the bypass conduit,
a liquid of the refrigerant flows out of the body through the first outlet during the cooling mode, and
a vapor of the refrigerant flows out of the body through the second outlet during the heating mode.
11. The heat pump system according to claim 10 , wherein
the first outlet has an opening that is open at a lower side of the space, and
the second outlet has an opening that is open at an upper side of the space.
12. The heat pump system according to claim 10 , wherein
the accumulator/receiver device includes a desiccant that is disposed in the space of the body to absorb water.