Liquid circulation heating system
A liquid circulation heating system performs air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator. This liquid circulation heating system includes: a heat pump circuit for circulating a refrigerant, having a radiator for heating the liquid by radiating heat from the refrigerant; and a solar heating apparatus for heating the liquid by solar heat. In this liquid circulation heating system, a first passage passing through the radiator and a second passage passing through the solar heating apparatus are formed as passages through which the liquid flows to produce the heated liquid.
1. A liquid circulation heating system for performing air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator, the system comprising:
a heat pump circuit for circulating a refrigerant, the heat pump circuit having a refrigerant radiator for heating the liquid by radiating heat from the refrigerant; and
a solar heating apparatus for heating the liquid by solar heat,
wherein a first passage passing through the refrigerant radiator and a second passage passing through the solar heating apparatus are formed as passages through which the liquid flows to produce the heated liquid,
the first passage has a first supply pipe for supplying the liquid to the refrigerant radiator, and a first recovery pipe for recovering the liquid heated in the refrigerant radiator,
the second passage has a second supply pipe for supplying the liquid to the solar heating apparatus, and a second recovery pipe for recovering the liquid heated in the solar heating apparatus, and
the system further comprises:
a main pipe having a first end connected directly to an upstream end of the first supply pipe and an upstream end of the second supply pipe,
a bypass pipe for connecting the first recovery pipe and the second supply pipe, the bypass pipe being connected directly to the first recovery pipe and the second supply pipe;
a switching member for determining whether the liquid heated in the refrigerant radiator is allowed to flow to a downstream side of the first recovery pipe or to flow to the bypass pipe; and
a junction pipe having a first end connected directly to a downstream end of the first recovery pipe and a downstream end of the second recovery pipe.
2. The liquid circulation heating system according to claim 1 ,
wherein the main pipe is provided with a pump for allowing the liquid to flow from a second end of the main pipe to the first end thereof, and
the first supply pipe or the first recovery pipe is provided with a first open/close valve, and the second supply pipe or the second recovery pipe is provided with a second open/close valve.
3. The liquid circulation heating system according to claim 2 , wherein the bypass pipe directly connects at an intermediate point of the first recovery pipe located on a downstream side of the first open/close valve and at an intermediate point of the second supply pipe located on a downstream side of the second open/close valve.
4. The liquid circulation heating system according to claim 1 , wherein the second end of the main pipe and a second end of the junction pipe are connected directly to the heating radiator.
5. A liquid circulation heating system for performing air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator, the system comprising:
a heat pump circuit for circulating a refrigerant, the heat pump circuit having a refrigerant radiator for heating the liquid by radiating heat from the refrigerant; and
a solar heating apparatus for heating the liquid by solar heat,
wherein a first passage passing through the refrigerant radiator and a second passage passing through the solar heating apparatus are formed as passages through which the liquid flows to produce the heated liquid,
the first passage has a first supply pipe for supplying the liquid to the refrigerant radiator, and a first recovery pipe for recovering the liquid heated in the refrigerant radiator,
the second passage has a second supply pipe for supplying the liquid to the solar heating apparatus, and a second recovery pipe for recovering the liquid heated in the solar heating apparatus, and
the system further comprising:
a main pipe having a first end connected directly to an upstream end of the first supply pipe and an upstream end of the second supply pipe,
a bypass pipe for connecting the first recovery pipe and the second supply pipe, the bypass pipe being connected directly to the first recovery pipe and the second supply pipe;
a switching member for determining whether the liquid heated in the refrigerant radiator is allowed to flow to a downstream side of the first recovery pipe or to flow to the bypass pipe;
a tank for storing the produced heated liquid, the tank having a lower portion connected directly to a second end of the main pipe, and having an upper portion connected directly to a downstream end of the first recovery pipe and a downstream end of the second recovery pipe, or when the downstream end of the first recovery pipe and the downstream end of the second recovery pipe are connected directly to a first end of a junction pipe, connected directly to a second end of the junction pipe;
a feed pipe for feeding the heated liquid stored in the tank to the heating radiator; and
a return pipe for returning the heated liquid to the tank after the heated liquid radiates heat in the heating radiator.
6. A liquid circulation heating system for performing air-heating by heating a liquid to produce a heated liquid and releasing heat of the heated liquid from a heating radiator, the system comprising:
a heat pump circuit for circulating a refrigerant, the heat pump circuit having a refrigerant radiator for heating the liquid by radiating heat from the refrigerant; and
a solar heating apparatus for heating the liquid by solar heat,
wherein a first passage passing through the refrigerant radiator and a second passage passing through the solar heating apparatus are formed as passages through which the liquid flows to produce the heated liquid,
the first passage has a first supply pipe for supplying the liquid to the refrigerant radiator, and a first recovery pipe for recovering the liquid heated in the refrigerant radiator,
the second passage has a second supply pipe for supplying the liquid to the solar heating apparatus, and a second recovery pipe for recovering the liquid heated in the solar heating apparatus, and
the system further comprising:
a main pipe having a first end connected directly to an upstream end of the first supply pipe and an upstream end of the second supply pipe,
a bypass pipe for connecting the first recovery pipe and the second supply pipe, the bypass pipe being connected directly to the first recovery pipe and the second supply pipe;
a switching member for determining whether the liquid heated in the refrigerant radiator is allowed to flow to a downstream side of the first recovery pipe or to flow to the bypass pipe;
a tank for storing the produced heated liquid, the tank having a lower portion connected directly to a second end of the main pipe, and having an upper portion connected directly to a downstream end of the first recovery pipe and a downstream end of the second recovery pipe, or when the downstream end of the first recovery pipe and the downstream end of the second recovery pipe are connected directly to a first end of a junction pipe, connected directly to a second end of the junction pipe;
a heat exchanger, disposed in the tank, for exchanging heat between the heated liquid stored in the tank and a secondary liquid;
a feed pipe for feeding the secondary liquid to the heating radiator after the secondary liquid is heated in the heat exchanger; and
a return pipe for returning the secondary liquid to the heat exchanger after the secondary liquid radiates heat in the heating radiator.
7. The liquid circulation heating system according to claim 5 , wherein the return pipe or the feed pipe is provided with a circulation pump.
8. The liquid circulation heating system according to claim 6 , wherein the return pipe or the feed pipe is provided with a circulation pump.
9. The liquid circulation heating system according to claim 1 , wherein the solar heating apparatus is a solar collector that provides solar heat directly to the liquid.
10. The liquid circulation heating system according to claim 1 , wherein the solar heating apparatus is a solar heater that provides solar heat to the liquid via a heating medium.
11. The liquid circulation heating system according to claim 1 , wherein the liquid is water, and the heated liquid is hot water.
12. The liquid circulation heating system according to claim 5 , wherein the solar heating apparatus is a solar collector that provides solar heat directly to the liquid.
13. The liquid circulation heating system according to claim 5 , wherein the solar heating apparatus is a solar heater that provides solar heat to the liquid via a heating medium.
14. The liquid circulation heating system according to claim 5 , wherein the liquid is water, and the heated liquid is hot water.
15. The liquid circulation heating system according to claim 6 , wherein the solar heating apparatus is a solar collector that provides solar heat directly to the liquid.
16. The liquid circulation heating system according to claim 6 , wherein the solar heating apparatus is a solar heater that provides solar heat to the liquid via a heating medium.
17. The liquid circulation heating system according to claim 6 , wherein the liquid is water, and the heated liquid is hot water.