JPWO2018193660A1 - Three-fluid heat exchanger - Google Patents

Abstract

The three-fluid heat exchanger (100) comprises a first heat exchanger (10a, 10b) and a second heat exchanger (11a, 11b). The first heat exchanger (10a, 10b) includes a heat storage tank (8a, 8b), a heat storage material (9a, 9b) stored in the heat storage tank (8a, 8b), and a heat storage material (9a, 9b) A plurality of plate fins (12a, 12b), which are arranged to be immersed in the heat storage tank (8a, 8b) and the plate fins (12a, 12b), and a heat medium flow pipe (13a, 13b) and. The second heat exchangers (11a, 11b, 11c) are alternately arranged adjacent to the heat storage tanks (8a, 8b) of the first heat exchanger (10a, 10b). The second heat exchanger (11a) is formed by joining two heat transfer plates (14a, 14b). A heat medium channel (15a) is formed between the heat transfer plates (14a, 14b).

Description

  The present invention relates to a three-fluid heat exchanger.

  A heat storage material utilizing heat exchanger that uses a heat storage material is known as a heat exchange device that uses a plurality of media.

  The heat storage material utilization heat exchanger described in Patent Document 1 is a three-fluid heat exchanger that performs heat exchange between a heat storage heat medium and a heat storage material, and between a heat storage material and a heat release heat medium. is there.

JP-A-63-21489

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

  When the three-fluid heat exchanger is designed for a hot water supply system, the heat transfer heat medium is water for hot water supply. Therefore, from the viewpoint of safety and health, it is required to prevent the mixing of water and another heat medium. In the three-fluid heat exchanger described in Patent Document 1, for example, a mixing prevention structure in which piping is doubled is required. There is a problem that the weight and the cost of the heat exchanger increase further by adopting the mixing prevention structure.

  The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a three-fluid heat exchanger capable of optimizing the heat exchange efficiency according to the material of each medium used. And

  In order to achieve the above object, a three-fluid heat exchanger according to the present invention exchanges heat between a first fluid and a 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 disposed adjacent to the first heat exchanger, the first heat exchanger comprising A heat storage tank, a heat storage material which is a second fluid stored in the heat storage tank, and a heat exchange member for heat storage material which is disposed in the heat storage material and in which the first fluid flows to exchange heat with the heat storage material; In the second heat exchanger, the third fluid flows, and the heat storage tank and the second heat exchanger are disposed adjacent to each other, and the second heat exchanger includes a plurality of heat exchangers. It has a heat plate.

  In the present invention, the heat storage medium flow passage through which the first fluid flows and the heat transfer medium circulation passage through which the third fluid flows are divided into separate parts. Therefore, different forms can be taken for the heat transfer medium for heat storage and the heat transfer medium for heat release. Therefore, the heat exchange efficiency can be optimized in accordance with the material of each medium used in the three-fluid heat exchanger.

Schematic perspective view of a three-fluid heat exchanger according to Embodiment 1 of the present invention Sectional view of the three-fluid heat exchanger as viewed from the line I-I shown in FIG. Cross-sectional enlarged view in which the dashed-dotted line portion C1 shown in FIG. Refrigerant circuit diagram of general heat pump type hot water supply system Refrigerant circuit diagram in which the three-fluid heat exchanger of the present invention is incorporated into 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 Embodiment 1 of the present invention Schematic perspective view of a three-fluid heat exchanger according to Embodiment 2 of the present invention Schematic perspective view of a three-fluid heat exchanger according to a third embodiment of the present invention Sectional view of the three-fluid heat exchanger viewed from the line II-II shown in FIG. Cross-sectional enlarged view in which the alternate long and short dash line portion C2 shown in FIG. 10 is enlarged. Schematic perspective view of an inner fin according to a third embodiment of the present invention The schematic perspective view of the three fluid heat exchanger in Embodiment 4 of this invention A cross-sectional enlarged view in which the cross section is cut along the line III-III shown in FIG. 13 and the dashed-dotted line portion C3 is enlarged. The cross-sectional enlarged view which cut | disconnected the cross section by the IV-IV line shown in FIG. 13, and expanded the dashed-dotted line part C3. The schematic perspective view of the three fluid heat exchanger in Embodiment 5 of this invention The schematic perspective view of the three fluid heat exchanger in Embodiment 6 of this invention Schematic arrow view seen from the V-V line shown in FIG. 17 Refrigerant circuit diagram of a heat pump type hot water supply system according to a seventh embodiment of the present invention The schematic perspective view of the three fluid heat exchanger in Embodiment 8 of this invention Schematic arrow view taken from the line VI-VI shown in FIG. 20 The schematic perspective view of the three fluid heat exchanger in Embodiment 9 of this invention The schematic perspective view of the three fluid heat exchanger in Embodiment 10 of this invention The schematic perspective view of the three fluid heat exchanger in Embodiment 11 of this invention A schematic arrow view seen from the line VII-VII shown in FIG. 24

  The three-fluid heat exchanger is a heat exchanger between the three fluids which exchanges heat between the first fluid and the second fluid and exchanges heat between the second fluid and the third fluid. . Hereinafter, a three-fluid heat exchanger according to an embodiment of the present invention will be described in detail based on the drawings. The present invention is not limited by the embodiment.

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

  As illustrated, 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 comprises 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. In the following description, the second heat exchanger 11 is a generic name of the second heat exchangers 11a, 11b, and 11c.

  In the following description, the first heat exchanger 10 and the second heat exchanger 11 are a generic name of 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 numeral only is a general term for a name having a reference numeral of the combination of the same numeral and alphabet.

  Each of the first heat exchangers 10a and 10b and the second heat exchangers 11a, 11b and 11c is formed substantially in a plate shape. In FIG. 1, the second heat exchanger 11a, the first heat exchanger 10a, the second heat exchanger 11b, the first heat exchanger 10b, and the second heat exchanger 11c are arranged in order. . The second heat exchanger 11a and the adjacent first heat exchanger 10a are joined to each other at 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 stored in the heat storage tank 8a. The heat storage material 9 b is stored in the heat storage tank 8 b. The heat medium flow pipes 13a and 13b respectively penetrate the heat storage tanks 8a and 8b from one side in the longitudinal direction of the heat storage tanks 8a and 8b. The heat medium flow pipes 13a and 13b are bent on the other side in the longitudinal direction of the heat storage tanks 8a and 8b, respectively, and penetrate the heat storage tanks 8a and 8b again. The heat medium flow pipes 13a and 13b are provided with heat medium inlets 16a and 16b for heat storage and heat medium outlets 17a and 17b for heat storage, which are exposed to one side in the longitudinal direction of the heat storage tanks 8a and 8b.

  The second heat exchanger 11a includes a heat release inlet 18a for heat release and a heat release outlet 19a for heat release. The second heat exchanger 11 b includes a heat release inlet 18 b for heat release and a heat release outlet 19 b for heat release. The second heat exchanger 11c is provided with a heat transfer medium inlet 18c and a heat transfer medium outlet 19c.

  The second heat exchangers 11a, 11b, and 11c are thinner than the adjacent heat storage tank 8a or heat storage tank 8b. Inside the second heat exchangers 11a, 11b, and 11c, a heat transfer heat medium can flow. As illustrated, heat medium outlets 19a, 19b, 19c for heat dissipation are provided on one side of the second heat exchangers 11a, 11b, 11c. The heat transfer medium outlets 19a, 19b and 19c for heat dissipation are disposed on the same side as the heat medium inlets 16a and 16b for heat storage and the heat medium outlets 17a and 17b for heat storage. In addition, heat transfer medium inlets 18a, 18b and 18c are provided on the other side of the second heat exchangers 11a, 11b and 11c in the longitudinal direction.

  The heat storage tank 8 is made of, for example, a metal such as carbon steel or stainless steel.

  The heat storage material 9 is manufactured from, for example, a latent heat storage material such as an aqueous solution of sodium acetate, paraffin or the like. The heat storage material 9 is a latent heat storage material which is solid at normal temperature and changes to a liquid when heated. The heat storage material 9 is treated as a fluid because it becomes a liquid in a heated and stored state.

  The second heat exchanger 11 is made of, for example, a metal such as carbon steel or stainless steel.

  The heat medium flow pipes 13a, 13b are made of, for example, a metal such as carbon steel, stainless steel, copper or the like.

  FIG. 2 is an arrow view of the three-fluid heat exchanger 100 taken along the line I-I shown in FIG.

  As shown in FIG. 2, the first heat exchangers 10 a and 10 b further include plate fins 12 a and 12 b, 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 a heat storage material heat exchange unit 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 part enclosed by the dashed-dotted line part C1 of FIG. 2 is expanded, and it shows in FIG. The part 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 by the heat medium flow pipe 13a. The plurality of plate fins 12a are arranged at regular intervals along the heat medium flow pipe 13a. The plate fin 12 a and the heat medium flow pipe 13 a form a tube fin type heat exchanger. Similarly, a tube fin type heat exchanger is formed by the plate fins 12 b and the heat medium flow pipe 13 b.

  The heat transfer plate 14 a and the heat transfer plate 14 b each have a concavo-convex shape formed by press molding. The heat transfer plate 14 a and the heat transfer plate 14 b are combined such that the respective recesses face each other. The heat medium flow path 15a through which the heat radiation heat medium flows is formed by the recess of the heat transfer plate 14a and the recess of the heat transfer plate 14b.

  The edge portions that substantially surround the recesses of the heat transfer plate 14a and the heat transfer plate 14b are flat surfaces to be joint surfaces. The edge of the heat transfer plate 14a and the edge of the heat transfer plate 14b are joined at a joint portion 111 shown by a thick dotted line in FIG. For bonding the heat transfer plate 14a and the heat transfer plate 14b, furnace brazing performed collectively with other bonding portions is used.

  The heat transfer plate 14b of the second heat exchanger 11a is joined to the heat storage tank 8a. The heat transfer plate 14c of the second heat exchanger 11b is joined to the heat storage tank 8a. Furthermore, the heat transfer plate 14d of the second heat exchanger 11b is joined to the heat storage tank 8b in a range not shown. Further, the heat transfer plate 14e of the second heat exchanger 11c is joined to the heat storage tank 8b. In the above-described 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 respectively joined. In-furnace brazing is used for these joining. Each part is joined structurally and thermally by brazing.

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

  Next, the thermal 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 a heat storage heat exchanger. In addition, the second heat exchangers 11a, 11b, and 11c are used as heat radiation heat exchangers.

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 from the heat storage heat medium inlets 16a and 16b of the first heat exchangers 10a and 10b. For example, CO ₂ which is a natural refrigerant is used as the heat medium for heat storage. The heat storage heat medium that has flowed in flows through the heat medium flow pipes 13a and 13b. The heat storage heat medium exchanges heat with the heat storage materials 9a and 9b through 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 heat taken from the heat medium for heat storage. Also, the heat storage heat medium 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 released. In order to dissipate heat, the heat transfer medium for heat release is made to flow from the heat transfer medium inlets 18a, 18b and 18c of the second heat exchangers 11a, 11b and 11c. Water is used as the heat transfer medium. The heat transfer heat medium passes through the heat medium flow paths 15a, 15b, 15c, and exchanges heat with the heat storage materials 9a, 9b through the heat storage tanks 8a, 8b. The heat transfer heat medium that has taken heat from the heat storage materials 9a and 9b exits from the heat transfer heat medium outlets 19a, 19b and 19c.

  When hot water is supplied using the three-fluid heat exchanger 100, the above-described procedure of heat storage and heat radiation is repeated.

  In Embodiment 1 described above, the first fluid, the second fluid, and the third fluid flowing through the three-fluid heat exchanger 100 correspond to the heat storage medium, the heat storage material, and the heat radiation medium, respectively. .

  The three-fluid heat exchangers of the prior art and of the present invention will now be further described using the refrigerant circuit diagrams of FIGS.

First, the cooling / heating cycle of the heat pump type hot water supply system will be described using a refrigerant circuit diagram of a general heat pump type hot water supply system shown in FIG. 4. First, the heat pump type hot water supply system takes in the outside air with the 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 transfer medium 81 that has absorbed heat is passed through the compressor 3a, and pressure is applied to bring it to a high temperature. Next, the heat pump type hot-water supply system passes the heat storage medium 81 having reached a high temperature to the water heat exchanger 4a. Water 82 supplied from the outside is stored in the hot water storage tank 5. The heat storage heat transfer medium 81 transfers heat to the water 82 sent from the hot water storage tank 5 in the water heat exchanger 4a. The heat pump type hot water supply system thereby provides 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 released. The refrigerant whose heat is absorbed by water in the water heat exchanger 4a is expanded through the expansion valve 6a, and the air heat exchanger 2a absorbs atmospheric heat again.

  On the other hand, a heat pump type hot water supply system using a three-fluid heat exchanger is described. FIG. 5 is a refrigerant circuit diagram in which the three-fluid heat exchanger is incorporated into a heat pump type hot water supply system.

First, the heat pump type hot water supply system takes in the outside air with the fan 1 b as in the case of FIG. 4. Subsequently, the heat pump type hot water supply system absorbs the heat in the air into the heat storage heat medium 81 by the air heat exchanger 2b. For example, CO _{2 of a} natural refrigerant is used as the heat medium 81 for heat storage. Subsequently, the heat pump type hot water supply system passes the heat storage heat medium 81 which has absorbed heat through the compressor 3 b to apply pressure to bring it to a high temperature. The heat storage heat transfer medium 81 which has reached a high temperature 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. Thereby, the heat storage material stores the heat taken from the heat medium 81 for heat storage. The heat storage heat transfer medium 81 deprived of heat expands through the expansion valve 6b, and absorbs the air heat again in the air heat exchanger 2b. When the hot water is supplied, the water 82 flows through the three-fluid heat exchanger 7. In the three-fluid heat exchanger 7, the heat storage material that has accumulated heat and the water 82 exchange heat. The heat pump type hot water supply system supplies the 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 stored in the three-fluid heat exchanger 7. Therefore, in the heat pump type hot water supply system using a 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 leads to a reduction of the device volume. By reducing the volume of the apparatus, it is possible to introduce a hot water supply system even in a building where the space of each room is limited, such as an apartment house, which has been difficult to install. In addition, the reduction in apparatus volume reduces the cost of the hot water supply system.

  FIG. 6 shows a 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 accommodated in the heat storage tank 71. In the heat exchanger 73, a heat medium 81 for heat storage and water 82 which is a heat medium for heat radiation are distributed. Thus, 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 performs heat storage and heat radiation.

  FIG. 7 shows the three-fluid heat exchanger 100 of the first embodiment. FIG. 7 shows a simplified structure in which the first heat exchanger 10 and the second heat exchanger 11 are thermally joined to be 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 heat exchanger 10b. Two heat exchangers 11 c are alternately arranged.

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

  The three-fluid heat exchanger 100 shown in FIG. 7 divides the heat exchange area between the heat storage medium heating heat medium and the heat storage medium and the heat exchange area between the heat storage medium and the heat storage absorption heat medium. It is a structure which makes it adjoin alternately.

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

  In the heat storage material utilization heat exchanger mentioned in the prior art document, the heat exchange site for heat storage and the heat exchange site for heat radiation are integrated. In the example of Patent Document 1, the heat transfer medium for heat storage and the heat transfer medium for heat release are integrated via a common plate fin. Moreover, in said heat exchanger, the substance of the heat medium for thermal storage and the heat medium for thermal radiation differs. In this heat exchanger, the pressure required for each heat medium, and the thermal resistance between the heat medium for heat storage and the heat storage material, and the heat medium between the heat storage material and the heat medium for heat radiation are different from each other. Due to the difference, there is a problem that the size, weight, cost and the like of the heat exchanger increase.

  However, with the configuration of the first embodiment, the heat transfer medium for heat storage and the heat transfer medium for heat release are separated into separate parts. By becoming separate parts from each other, it became possible to take different forms in each route. For example, a tube fin system capable of coping with the high pressure required for the heat medium is adopted for the heat medium circulation path for heat storage. Further, for example, a plate system having a large heat transfer area capable of coping with the large heat output required for heat exchange is adopted for the heat transfer medium for heat radiation. Thus, it becomes possible to adopt a heat exchange system independent of each other between the heat transfer medium for heat storage and the heat transfer medium for heat release.

  By making the heat exchange method independent, it is possible to optimize the heat exchange efficiency in accordance with the materials of the respective media which are the first fluid, the second fluid and the third fluid. When the present embodiment is used for a hot water supply apparatus, the heat transfer heat medium is water. For water, it is advantageous that the heat transfer medium for heat radiation be configured in a plate system having a large heat transfer area capable of coping with a large heat output.

  According to the first embodiment, the design element can be made independent between the heat transfer medium for heat storage and the heat transfer medium for heat release. 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, an optimum design of heat exchange efficiency is possible as compared with the prior art. Further, according to the first embodiment, the size, weight, cost and the like of the heat exchanger can be suppressed.

  Moreover, in Embodiment 1, the structure where the thermal storage tank 8 and the heat-transfer plate 14 of mutually different components are arrange | positioned by turns is employ | adopted. Thereby, it becomes easy to take the mixing prevention structure of two fluid between a thermal storage material and the heat medium for thermal radiation.

Second Embodiment
The second embodiment of the present invention is also a three-fluid heat exchanger incorporated in a heat pump type hot water supply system as in 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. Thus, the cross-sectional view of the three-fluid heat exchanger 100 is identical to that shown in FIG. However, the second embodiment differs 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 medium inlet 16 and the heat storage 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, and 16c which are inlets of the heat medium flow paths 15a, 15b, and 15c. The heat storage heat medium outlet 17 includes heat storage heat medium outlets 17a, 17b, and 17c which are outlets of the heat medium flow paths 15a, 15b, and 15c.

  The heat transfer medium inlet 18 and the heat transfer medium outlet 19 belong to the first heat exchanger 10. The heat transfer heat medium inlet 18 includes heat transfer heat medium inlets 18a and 18b, which are inlets of the heat medium flow pipes 13a and 13b. The heat transfer medium outlet 19 for heat release is provided with heat transfer medium outlets 19a and 19b for heat release which are outlets of the heat medium flow pipes 13a and 13b.

  Next, a thermal 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 and 11c are used as a heat storage heat exchanger. Further, the plate fins 12a, 12b and the heat medium flow pipes 13a, 13b are used as a heat exchanger for heat radiation.

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 from the heat storage heat medium inlets 16a, 16b, 16c of the second heat exchangers 11a, 11b, 11c. As a heat storage heat medium, CO ₂ which is a natural refrigerant is used. The heat storage heat medium that has flowed in flows through the heat medium flow paths 15a, 15b, and 15c. The heat storage heat medium exchanges heat with the heat storage materials 9a, 9b via the joint surfaces of the second heat exchangers 11a, 11b, 11c and the heat storage tanks 8a, 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 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 released. In order to dissipate heat, the heat transfer medium for heat release is made to flow from the heat transfer medium inlets 18a and 18b of the first heat exchangers 10a and 10b. The heat transfer heat medium passes through the heat medium flow pipes 13a and 13b, and exchanges heat with the heat storage materials 9a and 9b through the plate fins 12a and 12b. The heat transfer heat medium that has taken heat from the heat storage materials 9a and 9b exits from the heat transfer heat medium outlets 19a and 19b. Water is used as the heat transfer heat medium, and hot water is supplied.

  When hot water is supplied using the three-fluid heat exchanger 100, the above-described procedure of heat storage and heat radiation is repeated.

  In Embodiment 2 described above, the first fluid, the second fluid, and the third fluid flowing through the three-fluid heat exchanger 100 correspond to the heat transfer medium, the heat storage material, and the heat storage medium, respectively. .

  Also in the second embodiment, the same effect as the first embodiment can be obtained.

Third Embodiment
FIG. 9 is a schematic perspective view of a three-fluid heat exchanger 100 according to a third embodiment of the present invention. FIG. 10 is an arrow view showing the three-fluid heat exchanger 100 taken along line II-II shown in FIG. 11 is a cross-sectional enlarged view in which a cross section is taken along line II-II shown in FIG. 9 and a dashed-dotted line portion C2 shown in FIG.

  The three-fluid heat exchanger 100 according to the third embodiment includes a corrugated fin 22 disposed between two heat transfer plates 14a and 14b. The corrugated fins 22 are made of, for example, a metal such as an aluminum-based alloy or stainless steel, as with the heat transfer plates 14 a and 14 b. Joining of the corrugated fins 22 and the heat transfer plates 14a, 14b is carried out by furnace brazing. Therefore, the corrugated fins 22 are fins for heat transfer plates thermally joined to the heat transfer plates 14a and 14b.

  In the third embodiment, the heat transfer medium for heat dissipation flows through the heat transfer medium channels 15a, 15b, 15c via the heat transfer medium inlets 18a, 18b, 18c of FIG. The heat transfer 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 transfer medium for heat dissipation comes out of the heat transfer medium outlets 19a, 19b and 19c for heat dissipation.

  In addition to the above, corrugated fins 22 are disposed 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 transfer heat medium flows in 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 enables the heat output of the three-fluid heat exchanger 100 to be further increased.

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

Embodiment 4
FIG. 13 is a schematic perspective view of a three-fluid heat exchanger 100 according to a fourth embodiment of the present invention. FIG. 14 is a cross-sectional enlarged view in which a cross section is taken along line III-III shown in FIG. 13 and a dashed dotted line portion C3 is enlarged. Moreover, FIG. 15 is a cross-sectional enlarged view which cut | disconnected the cross section along the IV-IV line shown in FIG. 13, and expanded the dashed-dotted line part C3.

  As shown in FIG. 14, the three-fluid heat exchanger 100 according to the fourth embodiment includes a leaked liquid discharge flow path 24 disposed between the heat storage tank 8 a and the heat transfer plate 14 b. Since FIG. 14 is a view cut in the vertical direction of FIG. 13, the leaked liquid discharge flow path 24 is illustrated in the whole between the heat transfer plate 14 b and the heat storage tank 8 a. A view from above in FIG. 13 is FIG. 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 8 a.

  When manufacturing the three-fluid heat exchanger 100, the arrangement of the sheet-like brazing material corresponding to the position of the joint portion 131 and the leakage liquid discharge flow path 24 on the joint surface between the heat storage tank 8a and the heat transfer plate 14b. The application of the brazing material corresponding to the position is alternately performed. Thereafter, the leaked liquid discharge flow path 24 is formed by brazing and joining the heat storage tank 8a and the heat transfer plate 14b.

  Similarly to the above, the leaked liquid discharge flow path 24 is also 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. 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 transfer heat medium is water. If the heat transfer plate 14b and the heat storage tank 8a are broken due to corrosion or pressure, water and the heat storage material 9a may be mixed. As a result, the mixture 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 the 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. Thus, the water and the heat storage material do not mix.

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

  Three-fluid heat exchanger 100 of the fifth embodiment has the same mechanical configuration as three-fluid heat exchanger 100 of the first embodiment. However, the method of using the three-fluid heat exchanger 100 is different 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 radiation refrigerant flow in the second heat exchanger 11.

  The heat medium inlet 25 and the heat medium outlet 26 in the second heat exchanger 11 are respectively used as both a heat storage heat medium and a heat radiation heat medium. 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 two heat exchangers 11a, 11b, 11c.

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

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

  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 which is the first fluid heated to a high temperature flows from the heat medium inlets 25a, 25b, 25c of the second heat exchangers 11a, 11b, 11c. Water is used as the heat storage heat medium. The heat storage heat medium that has flowed in 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 fluid, through the joint surfaces of 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 deprived of heat by heat exchange exits from the heat medium outlets 26a, 26b, 26c.

  Subsequently, the heat stored in the heat storage materials 9a and 9b is released. In order to dissipate heat, the heat transfer heat medium which is the third fluid flows 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 transfer heat medium is water having a temperature lower than that of the heat storage heat medium. The heat transfer heat medium exchanges heat with the heat storage materials 9a, 9b via the joint surfaces of the second heat exchangers 11a, 11b, 11c and the heat storage tanks 8a, 8b. The heat transfer heat medium which has taken heat from the heat storage materials 9a and 9b by heat exchange leaves the heat medium outlets 26a, 26b and 26c as hot water. In Embodiment 5, it is preferable that the heat medium for heat release and the refrigerant for heat storage be a heat medium of the same substance.

  When hot water is supplied using the three-fluid heat exchanger 100, the above-described procedure of heat storage and heat radiation is 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 release heat medium are the same substance, as in the fifth embodiment, the heat medium flow paths 15a, 15b, 15c are commonly used by the heat storage heat medium and the heat release heat medium. Can be adopted. Since heat transfer is performed by the above-mentioned plate system when using the above-mentioned cooling-heat cycle, heat storage and heat radiation can be performed with a larger heat output than the heat storage material utilization heat exchanger of the prior art. Therefore, according to the fifth embodiment, it is possible to make the heat exchange efficiency higher than that of the prior art. In addition, according to the fifth embodiment, the size, weight, cost and the like of the heat exchanger can be suppressed. Further, in the fifth embodiment, the heat medium circulation channel used at the time of heat storage and the heat medium circulation channel used at the time of heat radiation can be shared. Therefore, it is possible to reduce the cost when considering the entire system using the three-fluid heat exchanger 100.

Sixth Embodiment
FIG. 17 is a schematic perspective view of a three-fluid heat exchanger 100 according to a sixth embodiment of the present invention. Moreover, FIG. 18 is the schematic arrow line view seen from the VV line | wire of FIG.

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

  In the heat storage tanks 8a and 8b, as in the first embodiment, a plurality of plate fins 12 arranged in parallel with each other at a constant interval are provided. 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 have penetrated 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 a heat storage material heat exchange unit that exchanges heat with the heat storage materials 9a and 9b.

  The thermal cycle of the three-fluid heat exchanger 100 of the sixth embodiment is similar to the thermal cycle of the fifth embodiment. In the case of heat storage, the heat storage refrigerant flows through the second heat exchangers 11a, 11b, and 11c. Also in the case of heat radiation, the heat radiation refrigerant flows through the second heat exchangers 11a, 11b, and 11c.

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

Seventh Embodiment
FIG. 19 is a refrigerant circuit diagram of a heat pump type hot water supply system according to a seventh embodiment of the present invention. The heat pump type hot water supply system of FIG. 19 shows an example 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 the outside air with the fan 1 b. Subsequently, the heat pump type hot water supply system absorbs the heat in the air into the heat storage heat medium 81 by the air heat exchanger 2b. Subsequently, the heat pump type hot water supply system passes the heat storage heat medium 81 which has absorbed heat through the compressor 3 b to apply pressure to bring it to a high temperature. The heat storage heat medium 81, which has reached a high temperature, 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 medium 81 for heat storage.

  The heat storage heat medium 81 whose heat has been removed by the heat exchanger 141 is expanded through the expansion valve 6b. The expanded heat storage heat medium 81 absorbs atmospheric heat again in the air heat exchanger 2b.

  The heat medium 83 which has become high temperature 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. The heat storage material 9 stores the heat taken from the heat medium 83 by heat exchange.

  When the hot water is supplied, the heat medium 83 circulates in the circulation path. 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 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 reverse to the illustrated direction. Further, when the hot water is supplied, the heat medium 83 may be further heated by heat exchange between the heat medium 81 for heat storage and the heat medium 83 in the heat exchanger 141.

Eighth Embodiment
FIG. 20 is a schematic perspective view of a three-fluid heat exchanger 100 according to an eighth embodiment of the present invention. FIG. 21 is a schematic view as viewed from the line VI-VI in FIG.

  As shown in FIGS. 20 and 21, the structure of the three-fluid heat exchanger 100 of the eighth embodiment is different from the structure of the three-fluid heat exchanger 100 of the first embodiment in the following points.

  As shown to FIG. 20, FIG. 21, 1st heat exchanger 10a, 10b is provided with the one common thermal storage tank 8. As shown in FIG. The heat storage tank 8 has a structure different from that of the heat storage tanks 8a and 8b of the first embodiment, which accommodates the plate fins 12a and 12b and the heat medium flow pipes 13a and 13b. The heat storage tank 8 is formed large so as to accommodate the second heat exchangers 11a, 11b and 11c in addition to the plate fins 12a and 12b and the heat medium flow pipes 13a and 13b.

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

  In the heat storage tank 8, a heat storage material 9 is stored. The plate fins 12a and 12b and the heat medium flow pipes 13a and 13b of the first heat exchangers 10a and 10b 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 lead line of the heat storage material 9 is the height of the liquid surface which is the upper end of the heat storage material 9 stored in the heat storage tank 8.

  The usage method of the three-fluid heat exchanger 100 of the eighth embodiment is the same as the usage method of the three-fluid heat exchanger 100 of the first embodiment. The heat storage refrigerant flows through the first heat exchanger 10. The heat storage material 9 stores heat by heat exchange with the heat storage refrigerant. Further, the heat radiation refrigerant, which flows through the second heat exchanger 11, is heated by heat exchange with the heat storage material 9 stored.

  The eighth embodiment also has an advantage over the heat storage material utilizing heat exchanger of the prior art as in the first embodiment.

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

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

  The first heat exchanger 10a includes a heat release inlet 18a for heat release and a heat release outlet 19a for heat release. The first heat exchanger 10b includes a heat release inlet 18b for heat release and a heat release outlet 19b for heat release.

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

  In the three-fluid heat exchanger 100 of the ninth embodiment, the heat storage refrigerant flows through the second heat exchangers 11a, 11b, and 11c. The heat storage material 9 stores heat by heat exchange with the heat storage refrigerant. Further, the heat radiation refrigerant flows through the first heat exchangers 10, 10b. The heat release 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 utilizing heat exchanger of the prior art as in the first embodiment.

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

  Three-fluid heat exchanger 100 of the tenth embodiment has the same mechanical configuration as three-fluid heat exchanger 100 of the eighth embodiment. However, in the eighth embodiment and the tenth embodiment, the method of using the three-fluid heat exchanger 100 is different. In the tenth embodiment, the heat medium flow pipes 13a and 13b of the first heat exchangers 10a and 10b are not used. In the tenth embodiment, the heat storage refrigerant and the heat radiation refrigerant flow through the second heat exchangers 11a, 11b, and 11c.

  As in 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 medium for heat storage and the heat medium for heat radiation.

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

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

  First, the heat storage material 9 of the first heat exchangers 10a and 10b stores heat. In order to store heat, the heat storage heat medium which is the first fluid heated to a high temperature flows from the heat medium inlets 25a, 25b, 25c of the second heat exchangers 11a, 11b, 11c. Water is used as the heat storage heat medium. The heat storage heat medium that has flowed in 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. The heat storage material 9 stores the heat taken from the heat storage heat medium by heat exchange. Further, the heat storage heat medium deprived of heat by heat exchange exits from the heat medium outlets 26a, 26b, 26c.

  Subsequently, the heat stored in the heat storage material 9 is released. In order to dissipate heat, the heat transfer heat medium which is the third fluid flows 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 transfer heat medium is water having a temperature lower than that of the heat storage heat medium. The heat transfer heat medium exchanges heat with the heat storage material 9 through the surfaces of the second heat exchangers 11a, 11b, and 11c. The heat transfer heat medium which has taken heat from the heat storage material 9 by heat exchange leaves the heat medium outlets 26a, 26b, 26c as hot water. In the tenth embodiment, it is preferable that the heat medium for heat release and the refrigerant for heat storage be a heat medium of the same material.

  In the subsequent use of the three-fluid heat exchanger 100, the above-described heat storage and heat release procedure is 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 release heat medium are the same substance, as in the tenth embodiment, the heat medium flow paths 15a, 15b and 15c are commonly used by the heat storage heat medium and the heat release heat medium. Can be adopted. Since heat transfer is performed by the above-mentioned plate system when using the above-mentioned cooling-heat cycle, heat storage and heat radiation can be performed with a larger heat output than the heat storage material utilization heat exchanger of the prior art. Therefore, according to the tenth embodiment, it is possible to make the heat exchange efficiency higher than that of the prior art. In addition, according to the tenth embodiment, the size, weight, cost and the like of the heat exchanger can be suppressed. Further, in the tenth embodiment, the heat medium circulation channel used at the time of heat storage and the heat medium circulation channel used at the time of heat radiation 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 a three-fluid heat exchanger 100 according to an eleventh embodiment of the present invention. FIG. 25 is a schematic view as viewed from the line VII-VII in FIG.

  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 from which the heat medium flow pipes 13a and 13b are omitted.

  As in the tenth embodiment, the heat storage tank 8 is provided with a plurality of plate fins 12a and 12b arranged in parallel to each other at a constant interval. 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 Embodiment 10 is closed.

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

  The thermal cycle of the three-fluid heat exchanger 100 of the eleventh embodiment is similar to the thermal cycle of the tenth embodiment. In the case of heat storage, the heat storage refrigerant flows through the second heat exchangers 11a, 11b, and 11c. Also in the case of heat radiation, the heat radiation refrigerant flows through the second heat exchangers 11a, 11b, and 11c.

  The eleventh embodiment, like the tenth embodiment, has an advantage over the heat storage material utilizing 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 above-described embodiment, 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 components changes, the same advantage as that of the first embodiment can be obtained. If the first heat exchanger 10 and the second heat exchanger 11 are alternately disposed adjacent to each other, one first heat exchanger 10 and one second heat exchanger 11 may be used. There can be more than one. In addition, it is the same that the number of the combination can be one or more than that in the fifth embodiment and the sixth embodiment, from the viewpoint of the combination of the heat storage tank 8 and the second heat exchanger 11 structurally.

  In addition to the materials of the respective parts described in the above embodiments, materials having similar characteristics may be used to take the above embodiments.

  Moreover, in the above-mentioned embodiment, the heat-medium flow path 15 is formed by facing each recessed part of two heat-transfer plates. Not limited to the above embodiment, only one of the two heat transfer plates may have a recess in order to form the heat medium channel 15. Further, the heat medium channel 15 may be formed by interposing a spacer between the two heat transfer plates.

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

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

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

  The present invention is capable of various embodiments and modifications without departing from the broad spirit and scope of the present invention. In addition, the embodiment described above 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 not by the embodiments but by the claims. And, various modifications applied within the scope of the claims and the 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 the Japanese Patent Application No. 2017-084367, the claims, and the entire drawing are incorporated herein by reference.

  The three-fluid heat exchanger according to the present invention can be suitably employed 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 fins, 13 heat medium flow pipes, 14 heat transfer plates, 15 heat medium flow paths, 16 heat storage heat medium inlet, 17 heat storage heat medium outlet, 18 heat release heat medium inlet, 19 Heat medium outlet for heat radiation, 22 corrugated fins, 23 inner fins, 24 flow path for liquid leakage, 25 heat medium inlet, 26 heat medium outlet, 71 heat storage tank, 72 heat storage material, 73 heat exchanger, 81 heat for heat storage Medium, 82 water, 83 heat medium, 100 three-fluid heat exchanger, 101 heat exchanger, 111 joint, 131 joint, 141 heat exchanger, 142 hot water heat exchanger, 143 four-way valve.

Claims (13)

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,
A first heat exchanger,
A second heat exchanger disposed adjacent to the first heat exchanger;
The first heat exchanger is
A heat storage tank,
A heat storage material which is the second fluid stored in the heat storage tank;
A heat storage material heat exchange portion disposed in the heat storage material, the first fluid flowing, and exchanging heat with the heat storage material;
The third fluid flows through the second heat exchanger;
The heat storage tank and the second heat exchanger are disposed adjacent to each other,
The second heat exchanger comprises a plurality of heat transfer plates,
Three-fluid heat exchanger. The second heat exchanger is disposed adjacent to the heat storage tank,
The three-fluid heat exchanger according to claim 1. 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 the third fluid flowing through the second heat exchanger,
The three-fluid heat exchanger according to any one of claims 1 to 3. The temperature of the first fluid flowing through the first heat exchanger is lower than the third fluid flowing through the second heat exchanger,
The three-fluid heat exchanger according to any one of claims 1 to 3. The heat storage material heat exchange unit is
A plurality of horizontally spaced plate fins arranged parallel to one another;
A heat medium flow pipe which penetrates the plurality of plate fins and is fixed to the plurality of plate fins;
The three-fluid heat exchanger according to any one of claims 1 to 5. 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,
A first heat exchanger,
And a second heat exchanger through which the first fluid and the third fluid flow.
The first heat exchanger is
A heat storage tank,
A heat storage material which is the second fluid stored in the heat storage tank;
A heat storage material heat exchange part which is disposed in the heat storage material and exchanges heat with the heat storage material;
The second heat exchanger comprises a plurality of heat transfer plates,
Three-fluid heat exchanger. The second heat exchanger is disposed adjacent to the heat storage tank,
The three-fluid heat exchanger according to claim 7. The second heat exchanger is housed in the heat storage tank,
The three-fluid heat exchanger according to claim 7. The heat storage material heat exchange unit is
Comprising a plurality of horizontally spaced plate fins arranged parallel to one another,
The three-fluid heat exchanger according to any one of claims 7 to 9. The second heat exchanger comprises a heat transfer medium channel formed between the two heat transfer plates,
The heat medium 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 10. The second heat exchanger further includes heat transfer plate fins thermally coupled to the two heat transfer plates in the heat medium flow channel.
The three-fluid heat exchanger according to claim 11. A leaked liquid discharge flow path is provided on the joint surface between the heat storage tank and the second heat exchanger.
A three-fluid heat exchanger according to claim 2 or 8.

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