JPS6123449B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is directed to solar heat utilization equipment that uses a harmful heat medium such as antifreeze to collect heat and use it for heating and hot water supply. The present invention relates to a solar heat utilization device that has high heat exchange efficiency and does not mix toxic heating medium into hot water even if holes are formed.

Conventional technology Conventionally, solar heat utilization equipment that prevents the mixing of toxic heating media requires a large number of heat exchangers to perform heat exchange in two stages, which reduces heat collection efficiency and requires a heat storage tank for hot water supply. Even when heat is transferred from the heating tank to the heat storage tank for heating, it is necessary to additionally provide a heat exchanger, which increases costs and is ineffective. That is, FIG. 1 shows a conventional solar heat utilization device, in which a circulation pump 2 is connected via a heat collector 1.
By circulating the antifreeze, the double-walled heat exchanger 4 inserted into the hot water supply heat storage tank 3 exchanges heat and heats the hot water supply, and the heat from the single-walled heat storage tank 5 inside the heating heat storage tank 5 is heated. The heating water was heated by the exchanger 6.

Problems to be Solved by the Invention However, in the above conventional configuration, two
One heat exchanger 4 with a heavy wall structure is required, and one heat exchanger 6 with a single wall structure is required.
In addition, when transferring heat from the heating heat storage tank 5 to the hot water supply heat storage tank 3, new heat exchangers 7 and 8 are inserted into the hot water supply heat storage tank 3 and the hot water supply heat storage tank 5, and the circulation pump 9 is operated. However, in this case, the number of heat exchangers increases, and as the number of heat exchangers increases, the heat loss increases and the cost becomes high.

An object of the present invention is to provide a solar heat utilization device that solves these conventional problems.

Means for Solving the Problems In order to solve the above problems, the present invention provides a solar heat collector that circulates antifreeze with an antifreeze circulation pump;
A hot water supply heat storage tank that circulates water with a hot water supply circuit circulation pump, a heating heat storage tank that circulates a heat medium with a heating circuit circulation pump, and a heat exchanger are provided, and the heat exchanger is connected to the antifreeze circulation heat collection circuit piping. In addition to connecting the water circulation hot water supply circuit piping and the heat medium circulation heating circuit piping, the heat exchanger is provided with passages for antifreeze, water, and heat medium, and heat transfer surfaces between the antifreeze liquid and the heat medium and between the heat medium and the water are provided through partition walls. It is composed of

Effect: According to the above configuration, one heat exchanger can extract heat from the solar heat collection circuit for hot water supply and space heating, and there is no possibility that antifreeze, heat medium, and water will mix with each other. As a result, the cost is low and safe, and the heat from the heating circuit can be used for hot water supply when heat is not collected, making effective use of solar heat possible, resulting in energy savings throughout the year. It is possible to provide an effective solar heat utilization device.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. FIG. 2 shows a system configuration diagram of a solar heat utilization device in an embodiment of the present invention.
11 is a heat collector, 12 is an antifreeze circulation pump, 13 is a check valve, 14 is a heat exchanger, 15 is a heat storage tank for hot water supply,
16 is a hot water supply circuit circulation pump, 17 is a heating heat storage tank, and 18 is a heating circuit circulation pump. Here, the heat collector 11 absorbs solar heat, and the antifreeze circulation pump 1
The heat medium heated in step 2 is conveyed to a heat exchanger 14. The heat exchanger 14 has passages through which three types of liquids: antifreeze in the solar heat collection circuit, water in the hot water supply circuit, and heat medium in the heating circuit pass, and heat transfer surfaces between the antifreeze and the heat medium and between the heat medium and the water. It has a structure that does not have a heat transfer surface between antifreeze and water. In addition, when storing solar heat in the hot water supply heat storage tank 15 and the heating heat storage tank 17 at the same time, if the circulation pumps 16 and 8 are operated at the same time, the heat exchanger 1
4, the antifreeze in the solar heat collection circuit and the heat medium in the heating circuit exchange heat through a single heat transfer wall, and further, the heat medium in the heating circuit and water in the hot water supply circuit exchange heat through a single heat transfer wall. Heat storage tank 15 for hot water supply and heat storage tank 1 for heating
7, if heat is stored only in either one of the hot water supply circuit circulation pump 16 or the heating circuit circulation pump 1.
All you have to do is drive 8. Here, the antifreeze in the solar heat collection circuit and the water in the hot water supply circuit have a heat medium in the heating circuit between them and are not in direct contact with each other through a single heat transfer wall, so the antifreeze from the solar heat collection circuit mixes into the water supply circuit. There is no danger of that. In addition, if the temperature of the heating heat storage tank 17 is higher than the temperature of the hot water supply heat storage tank 15 when heat is not collected, if the circulation pumps 16 and 18 are operated at the same time, the heat stored in the heating circuit can be transferred to the hot water supply circuit in a single manner. Heat is transferred by the heat transfer wall.

FIG. 3 shows an embodiment of the heat exchanger 14 in the solar heat utilization device of the present invention. In this FIG. Liquid passages a, b, c are provided in the outer pipe 21, inner pipe 22, and cylinder 19 of the heavy pipe, respectively, and connection ports a', a'', b', b'', c',
c″ is derived.

FIG. 4 shows another embodiment of the heat exchanger 14 in the solar heat utilization device of the present invention.
The one shown in the figure has a double cylinder configuration with an inner cylinder 23 and an outer cylinder 24, and a coiled pipe 25 is wound around the space between the inner cylinder 23 and the outer cylinder 24.
3 and the space between the outer cylinder 24, the inner cylinder 23, and the coiled pipe 25 are provided with liquid passages a, b, and c, respectively, and connection ports a', a'', b', b'', c', and c'' are provided, respectively. This is what was derived.

Effects of the Invention As is clear from the above embodiments, the solar heat utilization device of the present invention is capable of extracting heat for hot water supply and space heating from the solar heat collection circuit with one heat exchanger, and is capable of extracting heat from the solar heat collection circuit for hot water supply and space heating. Since the water does not mix with each other, it is both inexpensive and safe.Furthermore, the heat from the heating circuit can be used to heat hot water when there is no heat collection, so solar heat can be used effectively. As a result, it is possible to provide a solar heat utilization device that can achieve energy saving effects throughout the year.

[Brief explanation of the drawing]

Fig. 1 is a system configuration diagram of a solar heat utilization device showing a conventional example, Fig. 2 is a system configuration diagram of a solar heat utilization device showing an embodiment of the present invention, and Fig. 3a is a perspective view of a heat exchanger of the same device. , Fig. 3b is A- of Fig. 3a.
A sectional view taken along the line A′, FIG. 4a is a sectional view showing another embodiment of the heat exchanger in the solar heat utilization device of the present invention,
FIG. 4b is a sectional view taken along line B-B' of FIG. 4a. 11... Heat collector, 12... Antifreeze circulation pump,
14... Heat exchanger, 15... Heat storage tank for hot water supply, 16
... Hot water supply circuit circulation pump, 17 ... Heating heat storage tank, 18 ... Heating circuit circulation pump, 19 ... Cylinder, 20 ... Double pipe, 21 ... Outer pipe, 22
...Inner tube, 23...Inner tube, 24...Outer tube, 25...
...Coil-shaped pipe, a, b, c... passage.

Claims (1)

[Claims] 1 A solar heat collector that circulates antifreeze with an antifreeze circulation pump, a hot water heat storage tank that circulates water with a hot water circuit circulation pump, a heating heat storage tank that circulates heat medium with a heating circuit circulation pump, and a heat exchanger. The antifreeze circulation heat collection circuit piping, the water circulation hot water supply circuit piping, and the heat medium circulation heating circuit piping are respectively connected to the heat exchanger, and the heat exchanger is provided with passages for antifreeze, water, and heat medium, and a partition wall is provided. A solar heat utilization device consisting of a heat transfer surface of antifreeze to heat medium and heat medium to water via.