JPS5919250B2 - Solar heating system - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a solar heating system, specifically, a solar heating system that includes a high-temperature tank and a low-temperature tank that store heat according to the temperature of hot water collected by a collector. a heat dissipation circuit that circulates the heat through a condenser of a heat pump disposed in front of the heat radiator, and an auxiliary heat source circuit for the heat dissipation circuit that circulates the heat between the low temperature tank and the evaporator of the heat pump. This invention relates to a solar heating system.

(Background Art) A heating device using solar heat as shown in FIG. 1 is conventionally known.

To explain this solar heating system based on the drawing, A is the collector, the opening is the high temperature tank, and C is the low temperature tank. Enter the upper part of the warm and cold bath.

Also, the water led from the lower part of the high temperature tank mouth is similarly heated and enters the upper part of the high temperature tank mouth.

The selection of the above two flow paths is made using three-way valves 2 and 4. When sufficient solar heat can be collected, for example, in the summer, the flow path that goes through the first half of the low-temperature tank is selected, and in the winter, the flow path that goes through the high-temperature tank opening is selected. In short, the heat collection system includes a high temperature tank opening and a low temperature tank C that store heat depending on the temperature of the hot water collected by the collector, that is, the amount of heat collected by the collector.

Next, to explain the heat radiation system, the upper part of the high temperature tank opening is connected to the condenser part of the heat pump, and the return pipe coming out of the radiator part is connected to the lower part of the high temperature tank part, and the high temperature tank part and the radiator part are connected. A heat dissipation circuit is provided in which the heat pump passes through the condenser of the heat pump disposed in front of the heat radiator and then returns to the lower part of the heat pump. It is equipped with an auxiliary heat source circuit and a heat dissipation circuit to which the water supply pipe is connected and circulates between the low temperature tank and the evaporator of the heat pump.

In the above device, the amount of heat stored at the mouth of the high-temperature tank that stores solar heat decreases as the heat flows back through the heat dissipation circuit.

Here, the heat pump, which is an auxiliary heat source, is activated, and uses the low-temperature water in the low-temperature tank as a heat source to supplementally heat the hot water in the hot water supply pipe to enhance the heating effect. Return to the bottom of the high temperature tank mouth.

Therefore, the hot water that receives auxiliary heating from the auxiliary heat source circuit, flows through the return pipe, cools down to the high-temperature tank mouth, and returns, flows into the collector again and is heated there, but the hot water that returns after cooling down has a high temperature of heat. , the amount of heat collected by the collector is small and the solar heat utilization efficiency of the collector is low. Energy loss is large compared to heating.

[Purpose of the invention]

This invention was made with the aim of solving the above problems, and includes a high temperature tank and a low temperature tank that store heat according to the temperature of hot water collected by a collector, and a cooling tank that stores heat between the high temperature tank and the radiator. A conventional solar thermal system comprising a heat dissipation circuit that circulates through a condenser of a heat pump disposed in front of a radiator, and an auxiliary heat source circuit for the heat dissipation circuit that circulates between the cryogenic tank and the evaporator of the heat pump. To provide a solar heating system that not only maintains the heating effect by avoiding a decrease in the amount of heat extracted from a high temperature tank due to the operation of an auxiliary heat circuit of a heat dissipation circuit in the heating system, but also prevents energy loss for heating. .

[Disclosure of the invention]

This invention includes a high temperature tank and a low temperature tank that store heat according to the temperature of hot water collected by a collector, and a heat radiation circuit that circulates through a condenser of a heat pump arranged in front of the high temperature tank and the radiator. , in a solar heating system comprising an auxiliary heat source circuit for the heat radiation circuit that circulates between the low temperature tank and the evaporator of the heat pump, a closed circuit that circulates between a condenser and a radiator forming the heat radiation circuit; The present invention provides a solar heating system characterized by having an open heat circuit.

Hereinafter, this invention will be explained based on Example Drawing 1.

1 is a collector, 2 is a high temperature tank, 3 is a low temperature tank, 1617 is a three-way valve, and 4 is a circulation pump. As explained in the conventional example, the three-way valves 16 and 170 operate to control the temperature of the hot water collected by the collector 1. It is equipped with a high temperature tank 2 and a low temperature tank 3 that store heat according to the temperature.

A hot water supply pipe 8 is connected to the upper part of the high temperature tank 2, and the hot water supply pipe 8 is connected to a condenser 6 of a beat pump 5 and then to a radiator 10.

A return pipe 11 introduced into the lower part of the high temperature tank 2 is connected to the radiator 10, and passes through the condenser 6 of the heat pump 5 arranged in front of the radiator 10 between the high temperature tank 2 and the radiator 10. A heat dissipation circuit 18 is provided for circulating the heat.

A water supply pipe 15 is connected to the evaporator 7 of the heat pump 5 and returns to the lower part of the low temperature tank 3 from the upper part of the low temperature tank 3 that communicates with the high temperature tank 2, and connects the low temperature tank 3 and the heat pump 5.
An auxiliary heat source circuit 19 for the heat dissipation circuit 18 is provided, which circulates the heat between the evaporator γ and the evaporator γ.

The return pipe 11 of the heat radiation circuit 18 that is auxiliary heated by this auxiliary heat source circuit 19 is branched off via the three-way valve 12 and is connected to the hot water supply pipe 8 before being connected to the condenser 6 of the auxiliary heat source circuit 19.
An open heat circuit 21 is formed by a closed circuit 20 connected to the condenser 6 and the radiator 10 .

Note that 9 is a check valve. The operating state of the above device will be explained.

First, sufficient hot water is stored in the high temperature tank 2 by the collector 1.

The temperature of this hot water is then used to heat the room.

That is, hot water is guided from the hot water pipe 8 to the radiator 10 (the heat pump 5 is not operating), and the radiator 10 radiates heat (heating).
After that, the return water enters only the lower part of the high temperature tank 2 from the three-way valve 12.

By repeating the hot water circulation described above, the temperature of the hot water in the high-temperature tank 2 decreases, and the hot water temperature obtained from the upper part of the high-temperature tank 2 can no longer perform heating via the radiator 10.

In this case, the heat pump 5 is operated.

By operating the heat pump 5, the hot water flowing through the condenser 6 is heated to a heating temperature using the low temperature water in the low temperature tank 3 (low temperature water flowing through the water supply pipe 15) as a heat source,
It passes through the hot water pipe 8 and reaches the radiator 10.

After the heat has been radiated, the return water (hot water) passes through the return pipe 11 and is returned by the three-way valve 12 to the hot water pipe 8 before reaching the condenser 6.

The return water is then reheated by the heat pump 5 as described above.

The same process is repeated thereafter.

〔Effect of the invention〕

That is, the heat pump 5 raises the temperature of only the return water.

Therefore, since the temperature of the high temperature tank 2 is not raised by the operation of the heat pump 5 as in the conventional case, the amount of heat collected by the collector 1 increases, and as a result, the amount of heat stored in the high temperature tank 2 increases, and the heat is heated by the heat pump 5 and radiated by the radiator 10. Since the return water is reheated and flows again to the radiator 10, energy loss contributing to heating can be prevented.

[Brief explanation of drawings]

FIG. 1 is a device diagram showing a conventional example, and FIG. 2 is a device diagram showing an embodiment. 1...Collector, 2...High temperature tank, 3.
...Cryogenic chamber, 5...Heat pump, 6.
...Condenser, 7...Evaporator, 18...
... Heat dissipation circuit, 19 ... Auxiliary heat source circuit, 20
...Closed circuit, 21...Open heat circuit.

Claims (1)

[Claims] 1 Equipped with a high-temperature tank and a low-temperature tank that store heat according to the temperature of the hot water collected by the collector, and passing through a condenser of a heat pump placed in front of the radiator between the high-temperature tank and the radiator. In a solar heating system comprising a heat dissipation circuit that circulates the heat, and an auxiliary heat source circuit for the heat dissipation circuit that circulates the heat between the low temperature tank and the evaporator of the heat pump, a condenser and a radiator that constitute the heat dissipation circuit; A solar heating system characterized in that an open heat circuit is configured with a closed circuit that circulates heat.