Heat pump system and control method thereof
The heat pump system comprises an indoor unit and an outdoor unit communicated through a refrigerant pipeline. The outdoor unit comprises a compressor, a first heat exchanger, a first throttling device, and a change-over valve. The indoor unit comprises a second heat exchanger. A heat storage unit is arranged on the refrigerant gas-phase pipeline between the indoor unit and the outdoor unit, the heat storage unit comprising a first branch and a second branch arranged in parallel. The first branch is provided with a heat storage heat exchanger and a second throttling device, and the second branch is provided with a control valve device capable of cutting off refrigerant flowing through the second branch in a controlled manner. The heat pump system can operate in a cooling mode, a heating mode, a heat storage and heating mode, and a defrosting mode.
1 . A heat pump system, comprising:
an outdoor unit comprising a compressor, a first heat exchanger, a first throttling device, and a change-over valve;
an indoor unit comprising a second heat exchanger;
a refrigerant pipeline comprising a refrigerant gas-phase pipeline and a refrigerant liquid-phase pipeline;
a heat storage unit comprising a first branch and a second branch, wherein the first branch is provided with a heat storage heat exchanger and a second throttling device, and the second branch is provided with a control valve device capable of cutting off refrigerant flowing through the second branch in a controlled manner; and
wherein, the heat pump system is capable of operating in a heating mode,
wherein in the heating mode, the second throttling device is turned on with an opening, and the control valve device is turned on to allow the refrigerant to flow from the change-over valve of the outdoor unit to the second heat exchanger of the indoor unit through the second branch.
2 . The heat pump system according to claim 1 , wherein the heat storage unit is arranged on the refrigerant gas-phase pipeline.
3 . The heat pump system according to claim 1 , wherein the first branch and the second branch are arranged in parallel.
4 . The heat pump system according to claim 1 , wherein the heat pump system is capable of further operating in a cooling mode, a heat storage and heating mode, and/or a defrosting mode.
5 . The heat pump system according to claim 1 , wherein the control valve device comprises a solenoid valve or an electric ball valve.
6 . The heat pump system according to claim 1 , wherein the heat storage heat exchanger is a phase change heat exchanger.
7 . A heat pump system, comprising:
an outdoor unit comprising a compressor, a first heat exchanger, a first throttling device, and a change-over valve;
an indoor unit comprising a second heat exchanger;
a refrigerant pipeline comprising a refrigerant gas-phase pipeline and a refrigerant liquid-phase pipeline;
a heat storage unit comprising a first branch and a second branch, wherein the first branch is provided with a heat storage heat exchanger and a second throttling device, and the second branch is provided with a control valve device capable of cutting off refrigerant flowing through the second branch in a controlled manner; and
wherein, the heat pump system is capable of operating in a heat storage and heating mode,
wherein in the heat storage and heating mode, the second throttling device is fully turned on with the first throttling device playing a throttling role to store heat in the heat storage heat exchanger, and the control valve device is turned off, so that no refrigerant passes through the second branch.
8 . The heat pump system according to claim 7 , wherein, the heat pump system is capable of further operating in a heating mode, a cooling mode, and/or a defrosting mode.
9 . The heat pump system according to claim 7 , wherein the heat storage unit is arranged on the refrigerant gas-phase pipeline.
10 . The heat pump system according to claim 7 , wherein the first branch and the second branch are arranged in parallel.
11 . The heat pump system according to claim 7 , wherein the control valve device comprises a solenoid valve or an electric ball valve.
12 . The heat pump system according to claim 7 , wherein the heat storage heat exchanger is a phase change heat exchanger.
13 . A heat pump system, comprising:
an outdoor unit comprising a compressor, a first heat exchanger, a first throttling device, and a change-over valve;
an indoor unit comprising a second heat exchanger;
a refrigerant pipeline comprising a refrigerant gas-phase pipeline and a refrigerant liquid-phase pipeline;
a heat storage unit comprising a first branch and a second branch, wherein the first branch is provided with a heat storage heat exchanger and a second throttling device, and the second branch is provided with a control valve device capable of cutting off refrigerant flowing through the second branch in a controlled manner; and
wherein, the heat pump system is capable of operating in a heat storage and heating mode,
wherein in the heat storage and heating mode, the second throttling device is partially turned on to allow at least a portion of the refrigerant to flow through the heat storage heat exchanger, and the control valve device is turned on to allow most of the refrigerant to pass through the second branch.
14 . The heat pump system according to claim 13 , wherein, the heat pump system is capable of further operating in a heating mode, a cooling mode, and/or a defrosting mode.
15 . The heat pump system according to claim 13 , wherein the heat storage unit is arranged on the refrigerant gas-phase pipeline.
16 . The heat pump system according to claim 13 , wherein the first branch and the second branch are arranged in parallel.
17 . The heat pump system according to claim 13 , wherein the control valve device comprises a solenoid valve or an electric ball valve.
18 . The heat pump system according to claim 13 , wherein the heat storage heat exchanger is a phase change heat exchanger.