JP6775675B2 - How to use three-fluid heat exchanger and three-fluid heat exchanger - Google Patents

Description

The present invention relates to a three-fluid heat exchanger and a method of using the three-fluid heat exchanger .

As a heat exchanger that uses a plurality of media, a heat exchanger that uses a heat storage material is known.

The heat exchanger using a heat storage material described in Patent Document 1 is a three-fluid heat exchanger that exchanges heat between a heat storage material and a heat storage material and between a heat storage material and a heat radiation medium. is there.

Japanese Unexamined Patent Publication No. 63-21489

In the three-fluid heat exchanger described in Patent Document 1, the heat storage heat medium and the heat dissipation heat medium used are different substances from each other. When the substances of the heat storage heat medium and the heat radiation heat medium are different from each other, the pressure required for each heat medium is often different from each other. In addition, the thermal resistance between the heat storage heat medium and the heat storage material and the heat storage material and the heat dissipation heat medium are often different from each other. Based on these differences, one of the heat storage heat medium and the heat dissipation heat medium of the three-fluid heat exchanger is over-designed. Therefore, there is a problem that the size, weight, cost, etc. of the heat exchanger increase.

When designing a three-fluid heat exchanger for a hot water supply system, the heat dissipation heat medium is water for hot water supply. Therefore, from the viewpoint of safety and health, it is required to prevent mixing of water with other heat media. The three-fluid heat exchanger described in Patent Document 1 requires, for example, a mixing prevention structure in which the piping is doubled. By adopting the anti-mixing structure, there is a problem that the weight and cost of the heat exchanger are further increased.

The present invention has been made to solve the above problems, and is a three-fluid heat exchanger and a three-fluid heat exchanger that enable optimization of heat exchange efficiency according to the substance of each medium used . It is intended to provide a usage of .

In order to achieve the above object, the three-fluid heat exchanger according to the present invention exchanges heat between the first fluid and the second fluid, and heats between the second fluid and the third fluid. A three-fluid heat exchanger to be exchanged, comprising a first heat exchanger and a second heat exchanger thermally joined to the first heat exchanger, the first heat exchanger is , A heat storage tank, a heat storage material which is a second fluid stored in the heat storage tank, and a heat exchange unit for the heat storage material which is arranged in the heat storage material and in which the first fluid flows and exchanges heat with the heat storage material. A third fluid flows through the second heat exchanger, the heat storage tank and the second heat exchanger are thermally joined , and the second heat exchanger has a plurality of heat exchangers. A heat exchange unit provided with a heat plate includes a plurality of plate fins arranged in parallel with each other at a horizontal interval, and heat penetrating the plurality of plate fins and fixed to the plurality of plate fins. It is equipped with a medium flow pipe .

In the present invention, the heat storage heat medium distribution path through which the first fluid flows and the heat dissipation heat medium flow path through which the third fluid flows are separated into separate parts. Therefore, the heat storage heat medium distribution path and the heat dissipation heat medium flow path can take different forms. Therefore, it is possible to optimize the heat exchange efficiency according to the substance of each medium used in the three-fluid heat exchanger.

Schematic perspective view of the three-fluid heat exchanger according to the first embodiment of the present invention. Cross-sectional view of the three-fluid heat exchanger viewed from the line I-I shown in FIG. Enlarged cross-sectional view of the alternate long and short dash line portion C1 shown in FIG. Refrigerant circuit diagram of a general heat pump type hot water supply system Refrigerant circuit diagram in which the three-fluid heat exchanger of the present invention is incorporated in a heat pump type hot water supply system. Refrigerant circuit diagram of prior art three-fluid heat exchanger Refrigerant circuit diagram of the three-fluid heat exchanger according to the first embodiment of the present invention Schematic perspective view of the three-fluid heat exchanger according to the second embodiment of the present invention. Schematic perspective view of the three-fluid heat exchanger according to the third embodiment of the present invention. Cross-sectional view of the three-fluid heat exchanger viewed from line II-II shown in FIG. Enlarged cross-sectional view of the alternate long and short dash line portion C2 shown in FIG. Schematic perspective view of the inner fin according to the third embodiment of the present invention. Schematic perspective view of the three-fluid heat exchanger according to the fourth embodiment of the present invention. A cross-section enlarged view of the alternate long and short dash line portion C3 cut along the line III-III shown in FIG. A cross-section enlarged view of the alternate long and short dash line portion C3 cut along the IV-IV line shown in FIG. Schematic perspective view of the three-fluid heat exchanger according to the fifth embodiment of the present invention. Schematic perspective view of the three-fluid heat exchanger according to the sixth embodiment of the present invention. Schematic arrow view from the VV line shown in FIG. Refrigerant circuit diagram of the heat pump type hot water supply system according to the seventh embodiment of the present invention. Schematic perspective view of the three-fluid heat exchanger according to the eighth embodiment of the present invention. Schematic arrow view from the VI-VI line shown in FIG. 20 Schematic perspective view of the three-fluid heat exchanger according to the ninth embodiment of the present invention. Schematic perspective view of the three-fluid heat exchanger according to the tenth embodiment of the present invention. Schematic perspective view of the three-fluid heat exchanger according to the eleventh embodiment of the present invention. Schematic view taken from the line VII-VII shown in FIG. 24.

A three-fluid heat exchanger is a heat exchanger between three fluids that exchanges heat between a first fluid and a second fluid and exchanges heat between a second fluid and a third fluid. .. Hereinafter, the three-fluid heat exchanger according to the embodiment of the present invention will be described in detail with reference to the drawings. The present invention is not limited to this embodiment.

(Embodiment 1)
FIG. 1 is a schematic perspective view of the three-fluid heat exchanger 100 according to the first embodiment of the present invention.

As shown in the figure, the three-fluid heat exchanger 100 includes a first heat exchanger 10 and a second heat exchanger 11.

The first heat exchanger 10 includes two first heat exchangers 10a and 10b. The first heat exchanger 10a and the first heat exchanger 10b have the same structure as each other.

The second heat exchanger 11 includes three second heat exchangers 11a, 11b, 11c. The second heat exchanger 11a, the second heat exchanger 11b, and the second heat exchanger 11c have the same structure as each other. In the following description, the second heat exchanger 11 is a general term for the second heat exchangers 11a, 11b, and 11c.

In the following description, the first heat exchanger 10 and the second heat exchanger 11 are generic terms for the first heat exchangers 10a and 10b and the second heat exchangers 11a, 11b and 11c, respectively. Similarly, the notation of a name having a reference code of only numbers is a general term for names having a reference code of a combination of the same number and the alphabet.

The first heat exchangers 10a and 10b and the second heat exchangers 11a, 11b and 11c are all formed in a substantially plate shape. In FIG. 1, a second heat exchanger 11a, a first heat exchanger 10a, a second heat exchanger 11b, a first heat exchanger 10b, and a second heat exchanger 11c are arranged in this order. .. The second heat exchanger 11a and the adjacent first heat exchanger 10a are joined to each other on their main surfaces. The other two adjacent heat exchangers are similarly joined.

The first heat exchanger 10a includes a heat storage tank 8a, a heat storage material 9a, and a heat medium flow pipe 13a. The first heat exchanger 10b includes a heat storage tank 8b, a heat storage material 9b, and a heat medium flow pipe 13b.

The heat storage material 9a is housed in the heat storage tank 8a. The heat storage material 9b is housed in the heat storage tank 8b. The heat medium flow pipes 13a and 13b penetrate the heat storage tanks 8a and 8b from one side in the longitudinal direction of the heat storage tanks 8a and 8b, respectively. Further, the heat medium flow pipes 13a and 13b are bent on the other side of the heat storage tanks 8a and 8b in the longitudinal direction, respectively, and then penetrate the heat storage tanks 8a and 8b again. The heat medium flow pipes 13a and 13b are provided with heat storage heat medium inlets 16a and 16b and heat storage heat medium outlets 17a and 17b, which are exposed on one side of the heat storage tanks 8a and 8b in the longitudinal direction, respectively.

The second heat exchanger 11a includes a heat dissipation heat medium inlet 18a and a heat dissipation heat medium outlet 19a. The second heat exchanger 11b includes a heat dissipation heat medium inlet 18b and a heat dissipation heat medium outlet 19b. The second heat exchanger 11c includes a heat dissipation heat medium inlet 18c and a heat dissipation heat medium outlet 19c.

The second heat exchangers 11a, 11b, 11c have a plate shape thinner than that of the adjacent heat storage tank 8a or heat storage tank 8b. A heat radiating heat medium can be circulated inside the second heat exchangers 11a, 11b, and 11c. As shown, heat dissipation heat medium outlets 19a, 19b, 19c are provided on one side of the second heat exchangers 11a, 11b, 11c. The heat dissipation heat medium outlets 19a, 19b, 19c are arranged on the same side as the heat storage heat medium inlets 16a, 16b and the heat storage heat medium outlets 17a, 17b. Further, heat dissipation heat medium inlets 18a, 18b, 18c are provided on the other side of the second heat exchangers 11a, 11b, 11c in the longitudinal direction.

The heat storage tank 8 is manufactured from a metal such as carbon steel or stainless steel.

The heat storage material 9 is produced from a latent heat storage material such as an aqueous sodium acetate solution or paraffin. The heat storage material 9 is a latent heat storage material that changes to a liquid when heated as a solid at room temperature. Since the heat storage material 9 becomes a liquid in a state of being heated and storing heat, it is treated as a fluid.

The second heat exchanger 11 is manufactured from a metal such as carbon steel or stainless steel.

The heat medium flow pipes 13a and 13b are manufactured from metals such as carbon steel, stainless steel, and copper.

FIG. 2 is an arrow view of the three-fluid heat exchanger 100 viewed from the line II shown in FIG.

As shown in FIG. 2, the first heat exchangers 10a and 10b further include plate fins 12a and 12b, respectively. The plate fins 12a are immersed in the heat storage material 9a in the heat storage tank 8a. The plate fins 12b are immersed in the heat storage material 9b in the heat storage tank 8b. The combination of the heat storage tanks 8a and 8b, the plate fins 12a and 12b, and the heat medium flow pipes 13a and 13b corresponds to the heat exchange section for the heat storage material that exchanges heat with the heat storage materials 9a and 9b.

The second heat exchanger 11a is formed of two heat transfer plates 14a and 14b. The second heat exchanger 11b is formed of two heat transfer plates 14c and 14d. The second heat exchanger 11c is formed of two heat transfer plates 14e and 14f.

The portion surrounded by the alternate long and short dash line portion C1 in FIG. 2 is enlarged and shown in FIG. The portion surrounded by C1 is a part of the second heat exchanger 11a, the first heat exchanger 10a, and the second heat exchanger 11b.

As shown in FIG. 3, the plurality of plate fins 12a are penetrated through the heat medium flow pipe 13a. The plurality of plate fins 12a are arranged at regular intervals along the heat medium flow pipe 13a. A tube fin type heat exchanger is formed by the plate fins 12a and the heat medium flow pipe 13a. Similarly, the plate fins 12b and the heat medium flow pipe 13b form a tube fin type heat exchanger.

The heat transfer plate 14a and the heat transfer plate 14b each have an uneven shape formed by press molding. The heat transfer plate 14a and the heat transfer plate 14b are combined with their respective recesses facing each other. The recesses of the heat transfer plate 14a and the recesses of the heat transfer plate 14b form a heat medium flow path 15a through which the heat radiating heat medium flows.

The edges that substantially surround the recesses of the heat transfer plate 14a and the heat transfer plate 14b are flat surfaces that serve as joint surfaces. The edge of the heat transfer plate 14a and the edge of the heat transfer plate 14b are joined by a joint portion 111 shown by a thick dotted line in FIG. For joining the heat transfer plate 14a and the heat transfer plate 14b, brazing in a furnace, which is performed collectively with other joints, is used.

The heat transfer plate 14b of the second heat exchanger 11a is joined to the heat storage tank 8a. Further, the heat transfer plate 14c of the second heat exchanger 11b is joined to the heat storage tank 8a. Further, in a range not shown, the heat transfer plate 14d of the second heat exchanger 11b is joined to the heat storage tank 8b. Further, the heat transfer plate 14e of the second heat exchanger 11c is joined to the heat storage tank 8b. In the above joining of the heat transfer plate 14 and the heat storage tank 8, the entire joining surface is joined. Further, the heat storage tank 8a and the plate fins 12a, and the heat storage tank 8b and the plate fins 12b are joined to each other. Brazing in the furnace is used for these joints. By brazing, the parts are structurally and thermally joined.

The second heat exchanger 11a is a plate-type heat exchanger that exchanges heat via the heat transfer plate 14b. The second heat exchanger 11b is a plate-type heat exchanger that exchanges heat via the heat transfer plates 14c and 14d. The second heat exchanger 11c is a plate-type heat exchanger that exchanges heat via the heat transfer plate 14e.

Next, the cold heat cycle of the three-fluid heat exchanger 100 will be described. In the present embodiment, the plate fins 12a and 12b and the heat medium flow pipes 13a and 13b are used as heat storage heat exchangers. Further, the second heat exchangers 11a, 11b and 11c are used as heat exchangers for heat dissipation.

First, the heat storage materials 9a and 9b of the first heat exchangers 10a and 10b store heat. In order to store heat, the heat storage heat medium heated to a high temperature flows in from the heat storage heat medium inlets 16a and 16b of the first heat exchangers 10a and 10b. As the heat storage heat medium, for example, CO ₂ which is a natural refrigerant is used. The inflowing heat storage heat medium circulates through the heat medium flow pipes 13a and 13b. The heat storage heat medium exchanges heat with the heat storage materials 9a and 9b via the plate fins 12a and 12b and the heat medium flow pipes 13a and 13b. By heat exchange, the heat storage materials 9a and 9b store the heat taken from the heat storage heat medium. Further, the heat storage heat medium that has been deprived of heat by heat exchange exits from the heat storage heat medium outlets 17a and 17b.

Subsequently, the heat stored in the heat storage materials 9a and 9b is dissipated. In order to dissipate heat, the heat dissipation heat medium is circulated from the heat dissipation heat medium inlets 18a, 18b, 18c of the second heat exchangers 11a, 11b, 11c. Water is used as the heat radiating heat medium. The heat radiating heat medium passes through the heat medium flow paths 15a, 15b, 15c and exchanges heat with the heat storage materials 9a, 9b via the heat storage tanks 8a, 8b. The heat radiating heat medium that has taken heat from the heat storage materials 9a and 9b exits from the heat radiating heat medium outlets 19a, 19b and 19c.

When hot water is supplied using the three-fluid heat exchanger 100, the above-mentioned heat storage and heat dissipation procedures are repeated.

In the first embodiment, the first fluid, the second fluid, and the third fluid flowing through the three-fluid heat exchanger 100 correspond to a heat storage heat medium, a heat storage material, and a heat dissipation heat medium, respectively. ..

Next, the prior art and the three-fluid heat exchanger of the present invention will be further described with reference to the refrigerant circuit diagrams of FIGS. 4 to 7.

First, the cooling / heating cycle of the heat pump type hot water supply system will be described with reference to the refrigerant circuit diagram of the general heat pump type hot water supply system shown in FIG. First, the heat pump type hot water supply system takes in outside air with a fan 1a. The heat storage heat medium 81 absorbs the heat in the outside air taken in by the air heat exchanger 2a. A CO ₂ refrigerant is mainly used as the heat storage heat medium 81. Next, in the heat pump type hot water supply system, the heat storage heat medium 81 that has absorbed heat is passed through the compressor 3a, and pressure is applied to raise the temperature. Next, the heat pump type hot water supply system passes the hot heat storage heat medium 81 through the water heat exchanger 4a. Water 82 supplied from the outside is stored in the hot water storage tank 5. The heat storage heat medium 81 transfers heat to the water 82 sent from the hot water storage tank 5 in the water heat exchanger 4a. As a result, the heat pump type hot water supply system blows hot water. The hot water is stored in the hot water storage tank 5. When hot water is supplied, the hot water stored in the hot water storage tank 5 is discharged. The refrigerant whose heat has been taken by water in the water heat exchanger 4a expands through the expansion valve 6a, and the air heat exchanger 2a absorbs the atmospheric heat again.

On the other hand, we are proud of the heat pump type hot water supply system that uses a three-fluid heat exchanger. FIG. 5 is a refrigerant circuit diagram in which a three-fluid heat exchanger is incorporated in a heat pump type hot water supply system.

First, in the heat pump type hot water supply system, the outside air is taken in by the fan 1b as in the case of FIG. Subsequently, the heat pump type hot water supply system absorbs heat in the atmosphere into the heat storage heat medium 81 by the air heat exchanger 2b. For the heat storage heat medium 81, for example, CO _{2 as a} natural refrigerant is used. Subsequently, in the heat pump type hot water supply system, the heat storage heat medium 81 that has absorbed heat is passed through the compressor 3b, and pressure is applied to raise the temperature. The heat storage heat medium 81 that has become hot passes through the three-fluid heat exchanger 7. The heat storage heat medium 81 exchanges heat with the heat storage material in the three-fluid heat exchanger 7. As a result, the heat storage material stores the heat taken from the heat storage heat medium 81. The heat storage heat medium 81, which has been deprived of heat, expands through the expansion valve 6b and absorbs atmospheric heat again by the air heat exchanger 2b. When hot water is supplied, water 82 flows through the three-fluid heat exchanger 7. In the three-fluid heat exchanger 7, the heat storage material that stores heat and water 82 exchange heat. The heat pump type hot water supply system supplies heated water 82.

By incorporating the three-fluid heat exchanger 7 into the hot water supply system, heat is stored in the heat storage material housed in the three-fluid heat exchanger 7. Therefore, in the heat pump type hot water supply system using the three-fluid heat exchanger, the hot water storage tank 5 described in the hot water supply system of FIG. 4 becomes unnecessary. Therefore, the system can be simplified. The simplification of the system results in a reduction in equipment volume. By reducing the volume of the equipment, it is possible to introduce a hot water supply system even in a building where the space of each room is limited, for example, an apartment house, which has been difficult to install until now. In addition, the cost of the hot water supply system is reduced by reducing the volume of the device.

FIG. 6 shows the prior art three-fluid heat exchanger 7. The three-fluid heat exchanger 7 includes a heat storage tank 71, a heat storage material 72, and a heat exchanger 73. A heat storage material 72 and a heat exchanger 73 are housed in the heat storage tank 71. A heat storage heat medium 81 and water 82, which is a heat dissipation heat medium, are distributed in the heat exchanger 73. As described above, in the three-fluid heat exchanger 7, the heat exchanger 73 is in the heat storage tank 71 containing the heat storage material 72. Then, the heat exchanger 73 stores and dissipates heat.

FIG. 7 shows the three-fluid heat exchanger 100 of the first embodiment. FIG. 7 shows a simplified configuration in which the first heat exchanger 10 and the second heat exchanger 11 are thermally joined and adjacent to each other. More specifically, as shown in FIGS. 1 to 3, the second heat exchanger 11a, the first heat exchanger 10a, the second heat exchanger 11b, the first heat exchanger 10b, and the first The heat exchangers 11c of No. 2 are arranged alternately.

In the first heat exchanger 10, the heat exchanger 101 in the heat storage tank 8 containing the heat storage material 9 only stores heat. The heat exchanger 101 corresponds to the plate fin 12 and the heat medium flow pipe 13 in the above-mentioned structure. Further, the second heat exchanger 11 adjacent to the first heat exchanger 10 dissipates heat.

In the three-fluid heat exchanger 100 shown in FIG. 7, the heat exchange region between the heat storage material heating heat medium and the heat storage material and the heat exchange region between the heat storage material and the heat storage absorption heat medium are separated. The configuration is such that they are alternately placed next to each other.

The configuration of the three-fluid heat exchanger 100 of the first embodiment has the following effects.

In the heat exchanger using the heat storage material mentioned in the prior art document, the heat exchange part for heat storage and the heat exchange part for heat dissipation are integrated. In the example of Patent Document 1, the heat storage heat medium flow path and the heat dissipation heat medium flow path are integrated via a common plate fin. Further, in the above heat exchanger, the substances of the heat storage heat medium and the heat dissipation heat medium are different. In this heat exchanger, the pressure required for each heat medium and the thermal resistance between the heat storage heat medium and the heat storage material and the heat storage material and the heat dissipation heat medium are different from each other. Based on the difference, there is a problem that the size, weight, cost, etc. of the heat exchanger increase.

However, with the configuration of the first embodiment, the heat storage heat medium distribution path and the heat dissipation heat medium distribution path are separated into separate parts. By being separate parts from each other, it has become possible to take different forms in each route. For example, a tube fin system that can handle the high pressure required for a heat medium is adopted for the heat medium flow path for heat storage. Further, for example, a plate method having a large heat transfer area that can handle a large heat output required for heat exchange is adopted for the heat transfer heat medium flow path. In this way, it is possible to adopt independent heat exchange methods for the heat storage heat medium flow path and the heat dissipation heat medium flow path.

By making the heat exchange method independent, it is possible to optimize the heat exchange efficiency according to the substance of each medium which is the first fluid, the second fluid, and the third fluid. When this embodiment is used for a hot water supply device, the heat radiating heat medium is water. For water, it is advantageous that the heat transfer heat medium flow path is configured by a plate method having a large heat transfer area that can handle a large heat output.

According to the first embodiment, the design element can be made independent in the heat storage heat medium flow path and the heat dissipation heat medium flow path. The design elements are, for example, the tube diameter of the heat medium flow pipe 13, the fin pitch of the plate fins 12, the plate structure of the second heat exchanger 11, and the like. Therefore, according to the first embodiment, the optimum design of the heat exchange efficiency is possible as compared with the prior art. Further, according to the first embodiment, it is possible to suppress the size, weight, cost and the like of the heat exchanger.

Further, in the first embodiment, a structure is adopted in which the heat storage tanks 8 and the heat transfer plates 14 which are separate parts are alternately arranged. This facilitates a two-fluid mixing prevention structure between the heat storage material and the heat dissipation heat medium.

(Embodiment 2)
A second embodiment of the present invention is also a three-fluid heat exchanger incorporated in a heat pump type hot water supply system, similarly to the first embodiment.

FIG. 8 is a schematic perspective view of the three-fluid heat exchanger 100 of the second embodiment.

The three-fluid heat exchanger 100 of the second embodiment has the same mechanical configuration as the three-fluid heat exchanger 100 of the first embodiment. Therefore, the cross-sectional view of the three-fluid heat exchanger 100 is the same as that shown in FIG. However, the second embodiment is different from the first embodiment in that the first heat exchanger 10 and the second heat exchanger 11 are interchanged as a functional configuration.

In FIGS. 2 and 8, the heat storage heat medium inlet 16 and the heat storage heat medium outlet 17 belong to the second heat exchanger 11. The heat storage heat medium inlet 16 includes heat storage heat medium inlets 16a, 16b, 16c, which are inlets of the heat medium flow paths 15a, 15b, 15c. The heat storage heat medium outlet 17 includes heat storage heat medium outlets 17a, 17b, 17c, which are outlets of the heat medium flow paths 15a, 15b, 15c.

The heat dissipation heat medium inlet 18 and the heat dissipation heat medium outlet 19 belong to the first heat exchanger 10. The heat dissipation heat medium inlet 18 includes heat dissipation heat medium inlets 18a and 18b, which are inlets of the heat medium flow pipes 13a and 13b. The heat dissipation heat medium outlet 19 includes heat dissipation heat medium outlets 19a and 19b, which are outlets of the heat medium flow pipes 13a and 13b.

Next, the cold heat cycle of the three-fluid heat exchanger 100 of the second embodiment will be described. In the second embodiment, the second heat exchangers 11a, 11b, 11c are used as the heat storage heat exchangers. Further, the plate fins 12a and 12b and the heat medium flow pipes 13a and 13b are used as heat exchangers for heat dissipation.

First, the three-fluid heat exchanger 100 stores heat in the heat storage materials 9a and 9b of the first heat exchangers 10a and 10b. In order to store heat, the heat storage heat medium heated to a high temperature flows in from the heat storage heat medium inlets 16a, 16b, 16c of the second heat exchangers 11a, 11b, 11c. CO ₂ , which is a natural refrigerant, is used as the heat medium for heat storage. The inflowing heat storage heat medium flows through the heat medium flow paths 15a, 15b, and 15c. The heat storage heat medium exchanges heat with the heat storage materials 9a and 9b via the joint surface between the second heat exchangers 11a, 11b and 11c and the heat storage tanks 8a and 8b. By heat exchange, the heat storage materials 9a and 9b store the heat taken from the heat storage heat medium. Further, the heat storage heat medium that has been deprived of heat by heat exchange exits from the heat storage heat medium outlets 17a, 17b, and 17c.

Subsequently, the heat stored in the heat storage materials 9a and 9b is dissipated. In order to dissipate heat, the heat dissipation heat medium is circulated from the heat dissipation heat medium inlets 18a and 18b of the first heat exchangers 10a and 10b. The heat radiating heat medium passes through the heat medium flow pipes 13a and 13b and exchanges heat with the heat storage materials 9a and 9b via the plate fins 12a and 12b. The heat radiating heat medium that has taken heat from the heat storage materials 9a and 9b exits from the heat radiating heat medium outlets 19a and 19b. Water is used as the heat radiating heat medium, and hot water is supplied.

When hot water is supplied using the three-fluid heat exchanger 100, the above-mentioned heat storage and heat dissipation procedures are repeated.

In the second embodiment described above, the first fluid, the second fluid, and the third fluid flowing through the three-fluid heat exchanger 100 correspond to the heat radiation medium, the heat storage material, and the heat storage heat medium, respectively. ..

The same effect as that of the first embodiment can be obtained by the second embodiment.

(Embodiment 3)
FIG. 9 is a schematic perspective view of the three-fluid heat exchanger 100 according to the third embodiment of the present invention. FIG. 10 is an arrow view showing the three-fluid heat exchanger 100 viewed from the line II-II shown in FIG. 9. Further, FIG. 11 is an enlarged cross-sectional view in which the cross section is cut along the line II-II shown in FIG. 9 and the alternate long and short dash line portion C2 shown in FIG. 10 is enlarged.

The three-fluid heat exchanger 100 of the third embodiment includes corrugated fins 22 arranged between two heat transfer plates 14a and 14b. The corrugated fin 22 is made of a metal such as an aluminum alloy or stainless steel, similarly to the heat transfer plates 14a and 14b. The corrugated fins 22 and the heat transfer plates 14a and 14b are joined by brazing in a furnace. Therefore, the corrugated fin 22 is a heat transfer plate fin that is thermally joined to the heat transfer plates 14a and 14b.

In the third embodiment, the heat radiating heat medium circulates in the heat radiating heat medium channels 15a, 15b, 15c via the heat radiating heat medium inlets 18a, 18b, 18c of FIG. The heat radiating heat medium rises from the lower side of FIG. 9 through the gaps between the fins of the corrugated fins 22 of FIGS. 10 and 11. Then, the heat radiating heat medium exits from the heat radiating heat medium outlets 19a, 19b, 19c.

In addition to the above, corrugated fins 22 are also arranged between the heat transfer plates 14c and 14d and between the heat transfer plates 14e and 14f in the same manner as the second heat exchanger 11a.

In the third embodiment, when the heat radiating heat medium flows through the heat medium flow path 15, it passes through the flow path formed by the corrugated fins 22 and the heat transfer plates 14a and 14b.

Therefore, according to the third embodiment, the heat transfer area in the second heat exchanger 11a is larger than that in the first embodiment. This makes it possible to further increase the heat output of the three-fluid heat exchanger 100.

Further, the same effect can be obtained by arranging the inner fins 23 shown in FIG. 12 in the second heat exchangers 11a, 11b, 11c instead of the corrugated fins 22. The inner fins 23 are arranged by alternately shifting the corrugated shape of the corrugated fins 22 shown in FIG. 11 for each stage.

(Embodiment 4)
FIG. 13 is a schematic perspective view of the three-fluid heat exchanger 100 according to the fourth embodiment of the present invention. FIG. 14 is an enlarged cross-sectional view of the alternate long and short dash line portion C3 cut along the line III-III shown in FIG. Further, FIG. 15 is an enlarged cross-sectional view in which the cross section is cut along the IV-IV line shown in FIG. 13 and the alternate long and short dash line portion C3 is enlarged.

As shown in FIG. 14, the three-fluid heat exchanger 100 of the fourth embodiment includes a leakage liquid discharge flow path 24 arranged between the heat storage tank 8a and the heat transfer plate 14b. Since FIG. 14 is a view cut in the vertical direction of FIG. 13, the leaked liquid discharge flow path 24 is shown as a whole between the heat transfer plate 14b and the heat storage tank 8a. FIG. 15 is a view seen from above in FIG. 13. As shown in FIG. 15, the leaked liquid discharge flow path 24 is formed as a plurality of passages arranged at regular intervals in the longitudinal direction of the heat storage tank 8a.

When manufacturing the three-fluid heat exchanger 100, a sheet-shaped brazing material corresponding to the position of the joint portion 131 is arranged on the joint surface between the heat storage tank 8a and the heat transfer plate 14b, and the leaked liquid discharge flow path 24 The anti-wazing material corresponding to the position is applied alternately. After that, the leakage liquid discharge flow path 24 is formed by brazing joining the heat storage tank 8a and the heat transfer plate 14b.

Similar to the above, the leaked liquid discharge flow path 24 is also provided between the heat transfer plate 14c and the heat storage tank 8a, between the heat transfer plate 14d and the heat storage tank 8b, and between the heat transfer plate 14e and the heat storage tank 8b. It is provided.

The configuration of the three-fluid heat exchanger 100 of the fourth embodiment has the following effects.

When the three-fluid heat exchanger 100 is used for a hot water supply system, the heat radiating heat medium is water. If the heat transfer plate 14b and the heat storage tank 8a are destroyed by corrosion or pressure, water and the heat storage material 9a may be mixed. As a result, the mixed liquid of water and the heat storage material 9a is supplied with hot water. Therefore, from the viewpoint of safety and health, a structure that prevents mixing of water and the heat storage material 9a is required. According to the fourth embodiment, for example, when the heat storage tank 8a is destroyed by corrosion, the heat storage material 9a leaks to the outside through the leaked liquid discharge flow path 24. As a result, the water and the heat storage material do not mix.

(Embodiment 5)
FIG. 16 is a schematic perspective view of the three-fluid heat exchanger 100 according to the fifth embodiment of the present invention.

The three-fluid heat exchanger 100 of the fifth embodiment has the same mechanical configuration as the three-fluid heat exchanger 100 of the first embodiment. However, the method of using the three-fluid heat exchanger 100 differs between the fifth embodiment and the first embodiment. In the fifth embodiment, the heat medium flow pipe 13 of the first heat exchanger 10 is not used. Further, in the fifth embodiment, the heat storage refrigerant and the heat radiating refrigerant circulate in the second heat exchanger 11.

The heat medium inlet 25 and the heat medium outlet 26 in the second heat exchanger 11 are used for both the heat storage heat medium and the heat dissipation heat medium, respectively. The heat medium inlet 25 includes heat medium inlets 25a, 25b, 25c corresponding to the second heat exchangers 11a, 11b, 11c. The heat medium outlet 26 includes heat medium outlets 26a, 26b, 26c corresponding to the heat exchangers 11a, 11b, 11c of 2.

Further, the combination of the heat storage tanks 8a and 8b and the plate fins 12a and 12b corresponds to the heat exchange unit for the heat storage material that exchanges heat with the heat storage materials 9a and 9b.

Next, the cold heat cycle of the three-fluid heat exchanger 100 of the fifth embodiment will be described with reference to FIGS. 16 and 2.

First, the heat storage materials 9a and 9b of the first heat exchangers 10a and 10b store heat. In order to store heat, a heat storage heat medium, which is a first fluid heated to a high temperature, flows in from the heat medium inlets 25a, 25b, 25c of the second heat exchangers 11a, 11b, 11c. Water is used as the heat medium for heat storage. The inflowing heat storage heat medium flows through the heat medium flow paths 15a, 15b, and 15c. The heat storage heat medium exchanges heat with the heat storage materials 9a and 9b, which are the second fluids, via the joint surface between the second heat exchangers 11a, 11b and 11c and the heat storage tanks 8a and 8b. By heat exchange, the heat storage materials 9a and 9b store the heat taken from the heat storage heat medium. Further, the heat storage heat medium that has been deprived of heat by heat exchange exits from the heat medium outlets 26a, 26b, and 26c.

Subsequently, the heat stored in the heat storage materials 9a and 9b is dissipated. In order to dissipate heat, the heat dissipation heat medium, which is a third fluid, circulates through the heat medium flow paths 15a, 15b, 15c via the heat medium inlets 25a, 25b, 25c as in the case of heat storage. The heat radiating heat medium is water having a temperature lower than that of the heat storage heat medium. The heat radiating heat medium exchanges heat with the heat storage materials 9a and 9b via the joint surface between the second heat exchangers 11a, 11b and 11c and the heat storage tanks 8a and 8b. The heat radiating heat medium that has taken heat from the heat storage materials 9a and 9b by heat exchange goes out as hot water from the heat medium outlets 26a, 26b and 26c. In the fifth embodiment, it is preferable that the heat radiating heat medium and the heat storage refrigerant are heat media of the same substance.

When hot water is supplied using the three-fluid heat exchanger 100, the above-mentioned heat storage and heat dissipation procedures are repeated.

The configuration of the three-fluid heat exchanger 100 of the fifth embodiment has the following effects.

When the heat storage heat medium and the heat dissipation heat medium are the same substance, the heat medium flow paths 15a, 15b, and 15c are commonly used by the heat storage heat medium and the heat dissipation heat medium as in the fifth embodiment. It is possible to adopt the structure to be used. When the above-mentioned cold heat cycle is used, heat transfer is performed by the above-mentioned plate method, so that heat storage and heat dissipation can be performed with a heat output larger than that of the heat exchanger using the heat storage material of the prior art. Therefore, according to the fifth embodiment, it is possible to increase the heat exchange efficiency as compared with the prior art. In addition, according to the fifth embodiment, it is possible to control the size, weight, cost, etc. of the heat exchanger. Further, in the fifth embodiment, the heat medium flow path used for heat storage and the heat medium flow path used for heat dissipation can be shared. Therefore, it is possible to reduce the cost when considering the entire system using the three-fluid heat exchanger 100.

(Embodiment 6)
FIG. 17 is a schematic perspective view of the three-fluid heat exchanger 100 according to the sixth embodiment of the present invention. Further, FIG. 18 is a schematic arrow view taken from the line VV of FIG.

As shown in FIGS. 17 and 18, the three-fluid heat exchanger 100 of the sixth embodiment is obtained by removing the heat medium flow pipes 13a and 13b from the three-fluid heat exchanger 100 of the first embodiment.

Similar to the first embodiment, a plurality of plate fins 12 arranged in parallel with each other at regular intervals are provided in the heat storage tanks 8a and 8b. At the same time, the outer wall portions of the heat storage tanks 8a and 8b through which the heat medium flow pipes 13a and 13b penetrate in the first embodiment are closed.

In the sixth embodiment, as in the fifth embodiment, the combination of the heat storage tanks 8a and 8b and the plate fins 12a and 12b corresponds to the heat exchange section for the heat storage material that exchanges heat with the heat storage materials 9a and 9b.

The cold cycle of the three-fluid heat exchanger 100 of the sixth embodiment is the same as the cold cycle of the fifth embodiment. In the case of heat storage, the heat storage refrigerant circulates through the second heat exchangers 11a, 11b, 11c. Also in the case of heat dissipation, the heat dissipation refrigerant circulates through the second heat exchangers 11a, 11b, 11c.

The sixth embodiment, like the fifth embodiment, has an advantage over the heat storage material utilization heat exchanger of the prior art.

(Embodiment 7)
FIG. 19 is a refrigerant circuit diagram of the heat pump type hot water supply system according to the seventh embodiment of the present invention. The heat pump type hot water supply system of FIG. 19 shows an example of using the three-fluid heat exchanger 100 described in the fifth and sixth embodiments.

In FIG. 19, first, the heat pump type hot water supply system takes in outside air with a fan 1b. Subsequently, the heat pump type hot water supply system absorbs heat in the atmosphere into the heat storage heat medium 81 by the air heat exchanger 2b. Subsequently, in the heat pump type hot water supply system, the heat storage heat medium 81 that has absorbed heat is passed through the compressor 3b, and pressure is applied to raise the temperature. The heat storage heat medium 81 that has become hot passes through the heat exchanger 141. On the other hand, the heat medium 83 passes through the heat exchanger 141. The heat medium 83 exchanges heat with the heat storage heat medium 81.

The heat storage heat medium 81, which has been deprived of heat by the heat exchanger 141, expands through the expansion valve 6b. The expanded heat storage heat medium 81 absorbs atmospheric heat again in the air heat exchanger 2b.

The high temperature heat medium 83 passes through the second heat exchanger 11 of the three-fluid heat exchanger 100 via the hot water supply heat exchanger 142 and the four-way valve 143. The heat medium 83 in the second heat exchanger 11 exchanges heat with the heat storage material 9 of the first heat exchanger 10. By heat exchange, the heat storage material 9 stores the heat taken from the heat medium 83.

When hot water is supplied, the heat medium 83 circulates in the distribution channel. The heat medium 83 takes heat from the heat storage material 9 and is heated. The heated heat medium 83 passes through the hot water supply heat exchanger 142 via the four-way valve 143 and the heat exchanger 141. On the other hand, the water 82 passes through the hot water supply heat exchanger 142. In the hot water supply heat exchanger 142, the water 82 and the heat medium 83 exchange heat. The heated water 82 is supplied by heat exchange.

In FIG. 19, by switching the four-way valve 143, the circulation direction of the heat medium 83 may be opposite to that shown in the drawing. Further, when hot water is supplied, the heat medium 83 may be further heated by heat exchange between the heat storage heat medium 81 and the heat medium 83 in the heat exchanger 141.

(Embodiment 8)
FIG. 20 is a schematic perspective view of the three-fluid heat exchanger 100 according to the eighth embodiment of the present invention. Further, FIG. 21 is a schematic arrow view taken from the line VI-VI of FIG. 20.

As shown in FIGS. 20 and 21, the structure of the three-fluid heat exchanger 100 of the eighth embodiment and the structure of the three-fluid heat exchanger 100 of the first embodiment are different in the points described below.

As shown in FIGS. 20 and 21, the first heat exchangers 10a and 10b include one shared heat storage tank 8. The heat storage tank 8 has a structure different from that of the heat storage tanks 8a and 8b of the first embodiment in which the plate fins 12a and 12b and the heat medium flow pipes 13a and 13b are housed. The heat storage tank 8 is formed large so as to accommodate the second heat exchangers 11a, 11b, 11c in addition to the plate fins 12a, 12b and the heat medium flow pipes 13a, 13b.

The heat storage heat medium inlets 16a and 16b and the heat storage heat medium outlets 17a and 17b of the heat medium flow pipes 13a and 13b are exposed from the heat storage tank 8. Further, the bent portion between the heat storage heat medium inlets 16a and 16b and the heat storage heat medium outlets 17a and 17b is exposed from the heat storage tank 8. Further, the heat dissipation heat medium inlets 18a, 18b, 18c and the heat dissipation heat medium outlets 19a, 19b, 19c of the second heat exchangers 11a, 11b, 11c are exposed from the heat storage tank 8. In FIG. 20, in order to simply show the shape of the heat storage tank 8, the heat storage tank 8 is drawn with a solid line except for a portion hidden by each of the other members.

The heat storage material 9 is stored in the heat storage tank 8. The plate fins 12a and 12b of the first heat exchangers 10a and 10b, the heat medium flow pipes 13a and 13b, and the second heat exchangers 11a, 11b and 11c are immersed in the heat storage material 9 in the heat storage tank 8. ing. In FIG. 20, the solid line indicated by the leader line of the heat storage material 9 is the height of the liquid level at the upper end of the heat storage material 9 housed in the heat storage tank 8.

The method of using the three-fluid heat exchanger 100 of the eighth embodiment is the same as the method of using the three-fluid heat exchanger 100 of the first embodiment. The heat storage refrigerant circulates in the first heat exchanger 10. The heat storage material 9 stores heat by exchanging heat with the heat storage refrigerant. Further, the heat-dissipating refrigerant flows through the second heat exchanger 11, and the heat-dissipating refrigerant is heated by heat exchange with the stored heat storage material 9.

The eighth embodiment also has an advantage over the heat storage material utilization heat exchanger of the prior art, similarly to the first embodiment.

(Embodiment 9)
FIG. 22 is a schematic perspective view of the three-fluid heat exchanger 100 according to the ninth embodiment of the present invention.

The three-fluid heat exchanger 100 of the ninth embodiment has the same mechanical configuration as the three-fluid heat exchanger 100 of the eighth embodiment. However, the ninth embodiment is different from the eighth embodiment in that the first heat exchangers 10a and 10b and the second heat exchangers 11a, 11b and 11c are interchanged as a functional configuration.

The first heat exchanger 10a includes a heat dissipation heat medium inlet 18a and a heat dissipation heat medium outlet 19a. The first heat exchanger 10b includes a heat dissipation heat medium inlet 18b and a heat dissipation heat medium outlet 19b.

The second heat exchanger 11a includes a heat storage heat medium inlet 16a and a heat storage heat medium outlet 17a. The second heat exchanger 11b includes a heat storage heat medium inlet 16b and a heat storage heat medium outlet 17b. The second heat exchanger 11c includes a heat storage heat medium inlet 16c and a heat storage heat medium outlet 17c.

In the three-fluid heat exchanger 100 of the ninth embodiment, the heat storage refrigerant circulates through the second heat exchangers 11a, 11b, and 11c. The heat storage material 9 stores heat by exchanging heat with the heat storage refrigerant. Further, the heat-dissipating refrigerant flows through the first heat exchangers 10 and 10b. The heat-dissipating refrigerant is heated by heat exchange with the heat storage material 9 that has stored heat.

The ninth embodiment also has an advantage over the heat storage material utilization heat exchanger of the prior art, similarly to the first embodiment.

(Embodiment 10)
FIG. 23 is a schematic perspective view of the three-fluid heat exchanger 100 according to the tenth embodiment of the present invention.

The three-fluid heat exchanger 100 of the tenth embodiment has the same mechanical configuration as the three-fluid heat exchanger 100 of the eighth embodiment. However, the method of using the three-fluid heat exchanger 100 differs between the eighth embodiment and the tenth embodiment. In the tenth embodiment, the heat medium flow pipes 13a and 13b of the first heat exchangers 10a and 10b are not used. Further, in the tenth embodiment, the heat storage refrigerant and the heat radiating refrigerant circulate in the second heat exchangers 11a, 11b, 11c.

Similar to the fifth embodiment, the second heat exchanger 11a includes a heat medium inlet 25a and a heat medium outlet 26a. The second heat exchanger 11b includes a heat medium inlet 25b and a heat medium outlet 26b. The second heat exchanger 11c includes a heat medium inlet 25c and a heat medium outlet 26c. The heat medium inlets 25a, 25b, 25c and the heat medium outlets 26a, 26b, 26c are commonly used for the heat storage heat medium and the heat dissipation heat medium.

Further, the combination of the second heat exchangers 11a, 11b, 11c and the plate fins 12a, 12b shown in FIG. 21 corresponds to the heat exchange section for the heat storage material that exchanges heat with the heat storage material 9.

Next, the cold heat cycle of the three-fluid heat exchanger 100 of the tenth embodiment will be described with reference to FIGS. 23 and 21.

First, the heat storage material 9 of the first heat exchangers 10a and 10b stores heat. In order to store heat, a heat storage heat medium, which is a first fluid heated to a high temperature, flows in from the heat medium inlets 25a, 25b, 25c of the second heat exchangers 11a, 11b, 11c. Water is used as the heat medium for heat storage. The inflowing heat storage heat medium flows through the heat medium flow paths 15a, 15b, and 15c. The heat storage heat medium exchanges heat with the heat storage material 9 which is the second fluid via the surfaces of the second heat exchangers 11a, 11b, and 11c. By heat exchange, the heat storage material 9 stores the heat taken from the heat storage heat medium. Further, the heat storage heat medium that has been deprived of heat by heat exchange exits from the heat medium outlets 26a, 26b, and 26c.

Subsequently, the heat stored in the heat storage material 9 is dissipated. In order to dissipate heat, the heat dissipation heat medium, which is a third fluid, circulates through the heat medium flow paths 15a, 15b, 15c via the heat medium inlets 25a, 25b, 25c as in the case of heat storage. The heat radiating heat medium is water having a temperature lower than that of the heat storage heat medium. The heat radiating heat medium exchanges heat with the heat storage material 9 via the surfaces of the second heat exchangers 11a, 11b, and 11c. The heat radiating heat medium that has taken heat from the heat storage material 9 by heat exchange goes out as hot water from the heat medium outlets 26a, 26b, and 26c. In the tenth embodiment, it is preferable that the heat radiating heat medium and the heat storage refrigerant are heat media of the same substance.

In the subsequent use of the three-fluid heat exchanger 100, the above-mentioned heat storage and heat dissipation procedures are repeated.

The configuration of the three-fluid heat exchanger 100 of the tenth embodiment has the following effects.

When the heat storage heat medium and the heat dissipation heat medium are the same substance, the heat medium flow paths 15a, 15b, and 15c are commonly used by the heat storage heat medium and the heat dissipation heat medium as in the tenth embodiment. It is possible to adopt the structure to be used. When the above-mentioned cold heat cycle is used, heat transfer is performed by the above-mentioned plate method, so that heat storage and heat dissipation can be performed with a heat output larger than that of the heat exchanger using the heat storage material of the prior art. Therefore, according to the tenth embodiment, it is possible to increase the heat exchange efficiency as compared with the prior art. In addition, according to the tenth embodiment, it is possible to control the size, weight, cost, etc. of the heat exchanger. Further, in the tenth embodiment, the heat medium flow path used for heat storage and the heat medium flow path used for heat dissipation can be shared. Therefore, it is possible to reduce the cost when considering the entire system using the three-fluid heat exchanger 100.

(Embodiment 11)
FIG. 24 is a schematic perspective view of the three-fluid heat exchanger 100 according to the eleventh embodiment of the present invention. Further, FIG. 25 is a schematic arrow view taken from the line VII-VII of FIG. 24.

As shown in FIGS. 24 and 25, the three-fluid heat exchanger 100 of the eleventh embodiment is the three-fluid heat exchanger 100 of the tenth embodiment excluding the heat medium flow pipes 13a and 13b.

Similar to the tenth embodiment, the heat storage tank 8 is provided with a plurality of plate fins 12a and 12b arranged in parallel with each other at regular intervals. At the same time, the outer wall portion of the heat storage tank 8 through which the heat medium flow pipes 13a and 13b penetrate in the tenth embodiment is closed.

In the eleventh embodiment, as in the tenth embodiment, the combination of the heat storage tank 8 and the plate fins 12a and 12b corresponds to the heat exchange unit for the heat storage material that exchanges heat with the heat storage material 9.

The cold cycle of the three-fluid heat exchanger 100 of the eleventh embodiment is the same as the cold cycle of the tenth embodiment. In the case of heat storage, the heat storage refrigerant circulates through the second heat exchangers 11a, 11b, 11c. Also in the case of heat dissipation, the heat dissipation refrigerant circulates through the second heat exchangers 11a, 11b, 11c.

The eleventh embodiment, like the tenth embodiment, also has an advantage over the heat storage material utilization heat exchanger of the prior art.

The present invention is not limited to the above embodiment, and various modifications and applications are possible.

In the embodiment described above, the three-fluid heat exchanger 100 has a combination of two first heat exchangers 10 and three second heat exchangers 11. However, even if the number of configurations changes, the same advantages as in the first embodiment can be obtained. If the first heat exchanger 10 and the second heat exchanger 11 are arranged alternately adjacent to each other, one first heat exchanger 10 and one second heat exchanger 11 or each of them. There can be a plurality. From the viewpoint of structurally combining the heat storage tank 8 and the second heat exchanger 11, the number of combinations can be one or more in the fifth and sixth embodiments as well.

Moreover, in addition to the material of each part mentioned in the above-described embodiment, a material having similar properties may be used to take the above-described embodiment.

Further, in the above-described embodiment, the heat medium flow path 15 is formed so that the recesses of the two heat transfer plates face each other. Not limited to the above-described embodiment, only one of the two heat transfer plates may have a recess in order to form the heat transfer channel 15. Further, the heat medium flow path 15 may be formed by interposing a spacer between the two heat transfer plates.

Further, in the above-described embodiment, brazing in a furnace is used to join each part of the three-fluid heat exchanger 100. Not limited to the above-described embodiment, a joining method such as brazing or welding may be used.

Further, in the fourth embodiment, the leaked liquid discharge flow path 24 is provided by applying the sheet-shaped brazing material and the anti-brazing material. Not limited to the fourth embodiment, it is also possible to form the leaked liquid discharge flow path 24 by forming a groove in any of the heat storage tank 8 and the heat transfer plate 14 adjacent to each other by using a press or the like.

Further, in the sixth embodiment, a plurality of plate fins 12 are arranged in the heat storage tank 8. Not limited to the sixth embodiment, corrugated fins or the like may be arranged instead of the plate fins 12.

The present invention allows for various embodiments and modifications without departing from the broad spirit and scope of the present invention. Moreover, the above-described embodiment is for explaining the present invention, and does not limit the scope of the present invention. That is, the scope of the present invention is indicated by the scope of claims, not by the embodiment. Then, various modifications made within the scope of the claims and the equivalent meaning of the invention are considered to be within the scope of the present invention.

This application is based on Japanese Patent Application No. 2017-084367 filed on April 21, 2017. The specification of Japanese Patent Application No. 2017-084367, the scope of claims, and the entire drawing shall be incorporated into this specification as a reference.

The three-fluid heat exchanger according to the present invention can be suitably adopted in a hot water supply system.

1 fan, 2 air heat exchanger, 3 compressor, 4 water heat exchanger, 5 hot water storage tank, 6 expansion valve, 7 three fluid heat exchanger, 8 heat storage tank, 9 heat storage material, 10 first heat exchanger, 11 Second heat exchanger, 12 plate fin, 13 heat medium flow pipe, 14 heat transfer plate, 15 heat medium flow path, 16 heat storage heat medium inlet, 17 heat storage heat medium outlet, 18 heat dissipation heat medium inlet, 19 Heat dissipation heat medium outlet, 22 corrugated fin, 23 inner fin, 24 leaked liquid discharge flow path, 25 heat medium inlet, 26 heat medium outlet, 71 heat storage tank, 72 heat storage material, 73 heat exchanger, 81 heat storage heat Medium, 82 water, 83 heat medium, 100 three-fluid heat exchanger, 101 heat exchanger, 111 junction, 131 junction, 141 heat exchanger, 142 heat exchanger for hot water supply, 143 four-way valve.

Claims (8)

A three-fluid heat exchanger that exchanges heat between a first fluid and a second fluid and exchanges heat between the second fluid and a third fluid.
The first heat exchanger and
A second heat exchanger that is thermally joined to the first heat exchanger is provided.
The first heat exchanger is
With a heat storage tank
The heat storage material, which is the second fluid, stored in the heat storage tank,
A heat storage material heat exchange unit, which is arranged in the heat storage material and through which the first fluid flows and exchanges heat with the heat storage material, is provided.
The third fluid flows through the second heat exchanger, and the third fluid flows through the second heat exchanger.
The heat storage tank and the second heat exchanger are thermally joined to each other.
It said second heat exchanger, e Bei a plurality heat transfer plates,
The heat exchange unit for the heat storage material is
With multiple plate fins arranged horizontally spaced apart from each other,
A heat medium flow pipe that penetrates the plurality of plate fins and is fixed to the plurality of plate fins.
Three-fluid heat exchanger. The second heat exchanger is housed in the heat storage tank.
The three-fluid heat exchanger according to claim 1. The temperature of the first fluid flowing through the first heat exchanger is higher than that of the third fluid flowing through the second heat exchanger.
The three-fluid heat exchanger according to claim 1 or 2 . The temperature of the first fluid flowing through the first heat exchanger is lower than that of the third fluid flowing through the second heat exchanger.
The three-fluid heat exchanger according to claim 1 or 2 . The method of using the three-fluid heat exchanger according to claim 1 or 2 .
The first fluid is circulated to the second heat exchanger in place of the heat exchange unit for the heat storage material to exchange heat with the heat storage material.
After the flow of the first fluid, the third fluid is circulated in the second heat exchanger to exchange heat with the heat storage material.
How to use the three fluid heat exchangers. The second heat exchanger includes a heat medium flow path formed between the two heat transfer plates.
The heat transfer channel is a recess formed in at least one of the two heat transfer plates.
The three-fluid heat exchanger according to any one of claims 1 to 4 . The second heat exchanger further comprises fins for a heat transfer plate that are thermally joined to the two heat transfer plates in the heat medium flow path.
The three-fluid heat exchanger according to claim 6 . A flow path for discharging leaked liquid is provided on the joint surface between the heat storage tank and the second heat exchanger.
The three-fluid heat exchanger according to claim 1 .

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