JP2020063870A - Plate type heat exchanger - Google Patents

Abstract

To provide a plate type heat exchanger in which each plate body is preferably joined.SOLUTION: In a hydrogen gas cooling heat exchanger 30, while plurality of plate bodies 41 to 44 which includes a brine plate 42 having a groove forming area A2c formed with a brine passing groove enabling the passing of a brine, and a hydrogen gas plate 43 having a groove forming area A3c formed with a hydrogen gas passing groove enabling the passing of hydrogen gas, is laminated in a predetermined lamination order, joint surfaces of the plate bodies 41 to 44 are joined, and the hydrogen gas can be cooled by heat exchange between the hydrogen gas and the brine. On the brine plate 42, the groove forming area A2c is defined while avoiding a center part area A2a, and a through-hole H2 is formed in the center part area A2a. On the hydrogen gas plate 43, the groove forming area A3c is defined while avoiding the center part area A3a, and a through-hole H3 is formed in the center part area A3a.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a plate heat exchanger configured to be able to cool a fluid to be cooled by exchanging heat with a cooling fluid.

  As a plate heat exchanger of this type, the invention of a heat exchanger that cools hydrogen supplied to a vehicle using hydrogen gas as a fuel is disclosed in the following patent documents. This heat exchanger is installed in the hydrogen filling device that fills the hydrogen gas stored in the accumulator of the hydrogen station into the fuel tank (gas tank) of the hydrogen automobile, and moves from the accumulator to the fuel tank. The hydrogen gas is cooled by heat exchange with brine.

  Specifically, this heat exchanger is a plate heat exchanger, and has a groove for passing brine (hereinafter, also referred to as “brine passage groove”) and a groove for passing hydrogen gas (hereinafter, “hydrogen gas”). It is also configured to include a laminated body in which a plurality of metal plates in which a passage groove) is formed by an etching process are laminated. In this case, each of the above metal plates is formed of stainless steel into a rectangular shape in plan view. Further, each metal plate is formed with a circular hole portion (through hole) for introducing hydrogen gas into the hydrogen gas passage groove and for discharging hydrogen gas from the hydrogen gas passage groove, respectively. . This heat exchanger is integrated by diffusing and joining the joining surfaces of the plate bodies in a state where the metal plates are stacked in a predetermined stacking order.

Japanese Patent Laid-Open No. 2015-105760 (pages 7-12, 1-12)

  However, the heat exchangers disclosed in the above patent documents have the following problems to be solved. Specifically, in the heat exchanger disclosed in the above patent document, a plurality of metal plates laminated in a predetermined order are joined and integrated by diffusion joining.

  In this case, at the time of diffusion bonding of plates such as metal plates, the plates to be bonded are heated while being pressed in the plate thickness direction to bond the bonding surfaces of the plates. Further, when the plate bodies are joined by diffusion joining to manufacture a plate-type heat exchanger (laminate), the respective plates are thermally expanded by the heat applied during the joining process. At this time, since each plate is heated while being pressed in the plate thickness direction, each plate cannot expand in the plate thickness direction. It can be expanded (deformed) so as to expand in the direction. However, the central portion of each plate body cannot be greatly expanded along the plate surface due to the presence of the plate body components around the center portion. Therefore, during the joining process, the thermal stress generated in the central portion of each plate body tends to be larger than the thermal stress generated in the outer edge portion.

  Therefore, in the configuration of the heat exchanger disclosed in the above patent document, for example, when each metal plate is made large in size for the purpose of improving heat exchange efficiency (when configured with a wide plate body), when joining them The thermal stress generated in the central portion of each plate body becomes large and a large strain is generated in the central portion of each plate surface, and as a result, the joining of the central portion of each plate body may be incomplete. In this case, when the joining is incomplete, the thermal conductivity in the plate thickness direction of each plate decreases, so the heat exchange efficiency between the brine and hydrogen gas decreases in the central part of the heat exchanger. . Further, when the incomplete state is remarkable, the plates may be peeled off (damage to the heat exchanger).

  The present invention has been made to solve the above problems, and a main object of the present invention is to provide a plate heat exchanger in which the respective plate bodies are preferably joined.

  In order to achieve the above object, the plate heat exchanger according to claim 1 has one or a plurality of first groove forming regions having a first fluid passage groove through which a fluid to be cooled can pass. A plurality of plates including at least a first plate body and one or a plurality of second plate bodies having a second groove forming region in which a second fluid passage groove through which a cooling fluid can pass is formed. In the state where the bodies are stacked in a predetermined stacking order, the joint surfaces of the respective plate bodies are joined to each other, and the fluid to be cooled that passes through the first fluid passage groove and the second fluid passage A plate heat exchanger configured to cool the fluid to be cooled by heat exchange with the cooling fluid passing through the groove, wherein the first plate body is defined in a central portion in a plan view. The first groove formation region is defined so as to avoid the first central region and At least one first through hole is formed in the first central region, and the second plate body is provided with the second central region defined in the central region in plan view while avoiding the second central region. The groove forming region is defined, and at least one second through hole is formed in the second central region.

  The plate heat exchanger according to claim 2 is the plate heat exchanger according to claim 1, wherein the first plate body is formed in a rectangular shape in plan view, and the first plate body has a flat surface. The first groove forming region is defined so as to avoid the four first corner regions defined in the corners in the view, and at least one of the first penetrating regions is provided in each of the first corner regions. Each of the holes is formed, the second plate body is formed in a rectangular shape in plan view, and the second plate body avoids the four second corner regions defined by the corners in plan view. And the second groove forming region is defined, and at least one second through hole is formed in each of the second corner regions.

  The plate heat exchanger according to claim 3 is the plate heat exchanger according to claim 1 or 2, wherein the first through hole is a round hole and the second through hole is a round hole. It is composed of.

  A plate heat exchanger according to claim 4 is the plate heat exchanger according to any one of claims 1 to 3, wherein the plurality of plate bodies are made of the same material and have the same shape. One plate body and a plurality of the second plate bodies formed of the same material and have the same shape.

  The plate heat exchanger according to claim 5 is the plate heat exchanger according to claim 4, wherein each of the first plate bodies has a first notch portion in which an outer edge portion is recessed in the plate surface direction. , And at least one of first recesses in which the outer edge of the plate surface is recessed in the plate thickness direction is formed, and in each of the second plate bodies, in at least one of the first plate bodies. On the other hand, the second cutout portion in which the outer edge portion is recessed in the plate surface direction and the outer edge portion in the plate surface are recessed in the plate thickness direction so that at least some of the plate members do not overlap in the stacking direction. At least one of the second recesses is formed.

  A plate heat exchanger according to a sixth aspect is the plate heat exchanger according to any one of the first to fifth aspects, wherein the hydrogen gas as the fluid to be cooled can be cooled.

  In the plate heat exchanger according to claim 1, one or a plurality of first plate bodies having a first groove forming region in which a first fluid passage groove capable of passing a fluid to be cooled is formed, A first groove forming region is defined while avoiding a first central region defined in the central part in plan view, and at least one first through hole is formed in the first central region, One or a plurality of second plate bodies having a second groove forming region in which a second fluid passage groove capable of passing a cooling fluid is formed, and the second plate body is defined in the central portion in a plan view. The second groove formation region is defined so as to avoid the central region, and at least one second through hole is formed in the second central region.

  Therefore, in the plate heat exchanger according to claim 1, when the plates are heated and thermally expanded during the bonding process of the plates, the first central region and the second region of the first plate are provided. In the second central region of the plate body, a deformation occurs such that it expands toward the center of the first through hole and the second through hole (the diameter of each through hole is reduced), so that the first plate It is avoided that large thermal stress is generated in both central regions of the body and the second plate body. For this reason, during the joining process, no large distortion occurs in both central regions of the first plate body and the second plate body, so that the central region of each plate body can be reliably joined. Accordingly, not only peeling in the central region of each plate body can be preferably avoided, but the thermal conductivity in the central region between each plate body is improved, so that the cooling fluid in the vicinity of the central region can be improved. It is possible to sufficiently improve the heat exchange efficiency between the cooled fluid and the cooled fluid, that is, the cooling efficiency of the cooled fluid.

  In the plate heat exchanger according to claim 2, the first plate member formed in a rectangular shape in plan view avoids the four first corner regions defined by the corners in plan view. A groove forming region is defined, at least one first through hole is formed in each first corner region, and a second plate body formed in a rectangular shape in plan view has a corner in plan view. A second groove forming region is defined so as to avoid the four second corner regions defined in the section, and at least one second through hole is formed in each second corner region. There is.

  Therefore, in the plate heat exchanger according to the second aspect, when the plate bodies are heated and thermally expanded during the joining process of the plate bodies, the first corner regions and the second corner regions of the first plate body are provided. In each of the second corner regions of the plate body, a deformation occurs such that it expands toward the center of the first through hole and the second through hole (the diameter of each through hole is reduced). It is avoided that a large thermal stress is generated in each corner area of the plate body and the second plate body. Therefore, during the bonding process, no large strain is generated in each corner area where stress is likely to concentrate in the first plate body and the second plate body, so that each corner area of each plate body is reliably bonded. can do. Accordingly, not only can the peeling-off in each corner area of each plate body be suitably avoided, but the thermal conductivity in each corner area between each plate body can be improved, so that in the vicinity of each corner area. It is possible to sufficiently improve the heat exchange efficiency between the cooling fluid and the cooled fluid, that is, the cooling efficiency of the cooled fluid.

  According to the plate heat exchanger of claim 3, the first through hole is formed of a round hole, and the second through hole is formed of a round hole, so that the first through hole and the second through hole are formed. Since stress is less likely to concentrate at the rim of the through hole, cracks may occur at the rim of the first through hole and the second through hole during thermal expansion of the first plate and the second plate. Further, the vicinity of the first through hole and the second through hole can be more preferably joined without causing a situation in which a non-uniform deformation occurs and a good joined state is not obtained. Further, compared to forming a square hole or the like as the first through hole or the second through hole, since these holes can be formed uniformly and easily, the manufacturing cost of the plate heat exchanger can be reduced. It can be sufficiently reduced.

  According to the plate heat exchanger of claim 4, as the plurality of plate bodies, a plurality of first plate bodies having the same material and shape are formed, and a plurality of first plate bodies having the same material and shape are formed. By including the second plate body, the configuration including a plurality of types of first plate bodies having different materials and shapes, and the plurality of second types having different materials and shapes Compared with the configuration including the plate body, the material cost and the shape of the first plate body and the second plate body can be reduced by unifying the material and the shape. The manufacturing cost of the heat exchanger can be sufficiently reduced, and the materials and the shapes are equal to each other, so that the thermal expansion states of the first plate bodies during the joining process are equal to each other, and at the time of the joining process. Heat of each second plate State Zhang are equal to each other, since the degree and direction of strain occurring in these is matched state, it is possible to more suitably joined to each plate member.

  In the plate heat exchanger according to claim 5, at least one of a first cutout portion having an outer edge portion recessed in the plate surface direction and a first recessed portion having an outer edge portion of the plate surface recessed in the plate thickness direction. Are formed in each of the first plate bodies, and the outer edge portion is recessed in the plate surface direction so that at least a part of each of the first plate bodies does not overlap in the stacking direction of each plate body. At least one of the second cutout portion and the second recessed portion in which the outer edge portion of the plate surface is recessed in the plate thickness direction is formed in each second plate body.

  Therefore, according to the plate heat exchanger of the fifth aspect, the stacking order and the stacking direction of the first plate body and the second plate body are erroneous in the stacking process at the time of manufacturing the plate heat exchanger. At this time, since the arrangement state of the notches and / or the recesses becomes uneven, it is possible for the operator to surely and easily recognize that the stacking order and the stacking direction are wrong.

  According to the plate type heat exchanger of claim 6, since the hydrogen gas as the fluid to be cooled is configured to be cooled, each plate in the plate type heat exchanger into which high-pressure hydrogen gas is introduced during the cooling process. While suitably avoiding the leakage of hydrogen gas due to peeling of the body, the plate bodies are preferably joined and the thermal conductivity between the plate bodies is improved, so that the hydrogen gas is cooled appropriately. You can

It is a block diagram which shows the structure of the hydrogen gas supply system 100 which concerns on embodiment of this invention. It is an appearance perspective view of heat exchanger 30 for hydrogen gas cooling concerning an embodiment of the invention. It is explanatory drawing for demonstrating the internal structure of the heat exchanger 30 for cooling hydrogen gas which concerns on embodiment of this invention. FIG. 3 is an exploded perspective view of the hydrogen gas cooling heat exchanger 30 according to the embodiment of the present invention. It is an appearance perspective view of heat exchanger 30A for hydrogen gas cooling concerning other embodiments of the present invention. It is an external appearance perspective view of the brine plate 42a and the hydrogen gas plate 43a in the heat exchanger 30A for hydrogen gas cooling which concerns on other embodiment of this invention.

  An embodiment of a plate heat exchanger will be described below with reference to the accompanying drawings.

  First, the configuration of a hydrogen gas supply system 100 including a hydrogen gas cooling heat exchanger 30, which is an example of a “plate heat exchanger”, will be described with reference to the accompanying drawings.

  A hydrogen gas supply system 100 shown in FIG. 1 is equipment for a hydrogen gas station that supplies hydrogen gas to a supply object X such as a hydrogen gas fuel cell vehicle, and includes a hydrogen gas cooling device 1, a gas tank 2, and a dispenser. 3 and the like. In addition, in order to facilitate understanding of the configuration and operation of the hydrogen gas supply system 100, only the hydrogen gas cooling device 1, the gas tank 2 and the dispenser 3 and the hydrogen gas pipes 4a to 4c are shown in FIG. Illustrations of the components are omitted.

  The hydrogen gas cooling device 1 includes a refrigeration circuit 11, a brine tank 12, brine pipes 13a to 13d, liquid feed pumps 14a and 14b, a control unit 15 and a hydrogen gas cooling heat exchanger 30, and is an example of a "cooling fluid". Cooling the brine and supplying the cooled brine to the hydrogen gas cooling heat exchanger 30 to cool the hydrogen gas by heat exchange between the hydrogen gas and the brine, which is an example of the “fluid to be cooled”. It is configured to be able to.

  The refrigeration circuit 11 is a unitary refrigeration circuit, which includes a compressor 21, a condenser 22, an expansion valve 23, and an evaporator 24, and as will be described later, freon (refrigerant) and brine (heat medium liquid: cooling fluid). The brine can be cooled by heat exchange with. The brine tank 12 is configured to store brine cooled by the refrigeration circuit 11 (evaporator 24) and supplied to the hydrogen gas cooling heat exchanger 30 as described later.

  The brine pipes 13a and 13b connect the evaporator 24 of the refrigeration circuit 11 and the brine tank 12 to each other. In this case, in the hydrogen gas cooling device 1 of the present example, the brine in the brine tank 12 is supplied to the evaporator 24 via the brine pipe 13a to be cooled and then guided to the brine tank 12 via the brine pipe 13b. As a result, a structure in which brine is circulated between the brine tank 12 and the evaporator 24 is adopted.

  The brine pipes 13c and 13d connect the brine tank 12 and the hydrogen gas cooling heat exchanger 30 to each other. In this case, in the hydrogen gas cooling device 1 of the present example, the brine in the brine tank 12 is supplied to the hydrogen gas cooling heat exchanger 30 via the brine pipe 13c to exchange heat with hydrogen, and then the brine pipe 13d. A configuration is adopted in which the brine is circulated between the brine tank 12 and the hydrogen gas cooling heat exchanger 30 by being guided to the brine tank 12 via.

  The liquid feed pump 14a pumps the brine in the brine tank 12 toward the evaporator 24 under the control of the controller 15, and the liquid feed pump 14b cools the brine in the brine tank 12 with hydrogen gas under the control of the controller 15. It is pressure-fed toward the heat exchanger 30 for use. In this case, in the hydrogen gas cooling device 1 of the present example, the liquid feed pump 14a pressure-feeds the brine in the brine tank 12 to the evaporator 24, so that the brine in the evaporator 24 (brine cooled in the evaporator 24). Is guided to the brine tank 12, and the liquid feed pump 14b pressure-feeds the brine in the brine tank 12 to the hydrogen gas cooling heat exchanger 30 so that the brine in the hydrogen gas cooling heat exchanger 30 is removed. The configuration guided by 12 is adopted.

  Instead of the configuration of the hydrogen gas cooling device 1 described above, for example, the brine in the brine tank 12 is supplied to the refrigeration circuit 11 (evaporator 24) to be cooled and then directly supplied to the hydrogen gas cooling heat exchanger 30. In addition to cooling the hydrogen gas, the brine pipes 13d and 13c may be arranged so that the brine whose temperature has risen due to the cooling of the hydrogen gas is collected in the brine tank 12 (not shown). Further, when used in an environment in which there is no possibility of continuously cooling a large amount of hydrogen gas, that is, in an environment in which a large amount of brine does not have to be provided, the brine tank 12 is unnecessary and the refrigeration circuit 11 (evaporator) is eliminated. It is also possible to adopt a configuration in which brine is directly circulated between 24) and the heat exchanger 30 for cooling the hydrogen gas (not shown).

  The control unit 15 controls the hydrogen gas cooling device 1 as a whole. Specifically, the control unit 15 controls the compressor 21 to perform compression of a sufficient and necessary amount of refrigerant for cooling the brine at the time of performing the brine cooling process of cooling the brine by the refrigeration circuit 11 (evaporator 24). At the same time, the expansion valve 23 is controlled to supply the evaporator 24 with a sufficient amount of refrigerant necessary for cooling the brine.

  In addition, the control unit 15 controls the liquid feed pump 14 a in parallel with the brine cooling process by the refrigeration circuit 11 to circulate the brine between the brine tank 12 and the evaporator 24, so that the brine in the brine tank 12 is cooled. Is maintained at a specified temperature (a temperature suitable for cooling hydrogen gas). Further, the control unit 15 controls the liquid feed pump 14b to circulate the brine between the brine tank 12 and the hydrogen gas cooling heat exchanger 30, so that the brine is moved from the gas tank 2 toward the dispenser 3. The existing hydrogen gas is cooled by exchanging heat with the brine in the hydrogen gas cooling heat exchanger 30.

  On the other hand, the heat exchanger 30 for cooling the hydrogen gas is connected to the control valve 3a of the dispenser 3 via the hydrogen gas pipe 4b, connected to the air supply target X via the hydrogen gas pipe 4c, and the brine pipe 13c. , 13d to the brine tank 12. In this case, in the hydrogen gas supply system 100 of this example, the heat exchanger 30 for cooling the hydrogen gas is installed in the dispenser 3 as one of the components of the hydrogen gas cooling device 1, and the gas tank 2 to the control valve 3a. Cooling the hydrogen gas flowing toward the air supply target X through the heat exchanger to a predetermined temperature (for example, a temperature within a temperature range of −33 ° C. to −40 ° C.) by heat exchange with brine. Is possible.

  As shown in FIGS. 2 to 4, the heat exchanger 30 for cooling hydrogen gas includes a brine plate 42 that is an example of a “second plate” and a hydrogen gas plate that is an example of a “first plate”. 43 is alternately laminated between the base plates 41 and 44 (an example of a “predetermined lamination order”), and these joint surfaces are joined together by diffusion joining to form a body portion 40, and a body portion 40. And a plurality of connectors (not shown) mounted on the base plate 44 so that the brine pipes 13c and 13d and the hydrogen gas pipes 4b and 4c can be connected. In this case, in the hydrogen gas cooling heat exchanger 30 of this example, the base plate 41, the brine plate 42, the hydrogen gas plate 43, and the base plate 44 correspond to “plates”.

  In the following description, the base plate 41, the brine plate 42, the hydrogen gas plate 43, and the base plate 44 are also collectively referred to as “plates 41 to 44”. Moreover, in each of FIGS. 2 to 6 referred to in the present specification, the thickness of each plate is illustrated to be thicker than the actual thickness in order to facilitate understanding of the configuration of the “plate heat exchanger”. Further, in the actual hydrogen gas cooling heat exchanger 30, in order to avoid heat dissipation and heat absorption, the stacked body of each of the plate bodies 41 to 44 is covered with a heat insulating material or housed in a heat insulating casing. However, illustration and description of these heat insulating materials and casings are omitted.

  The base plates 41 are each formed of a metal plate such as stainless steel in a quadrangular shape in plan view. As shown in FIGS. 3 and 4, the base plate 41 includes central portions (planar portions A2a of a brine plate 42, which will be described later, and central portions A3a of the hydrogen gas plate 43) of the respective plate bodies 41 to 44 in plan view. Central region A1a is defined in a region where they overlap each other in the stacking direction), and each plate with respect to four corners in plan view (corner region A2b in the brine plate 42 described later and corner region A3b in the hydrogen gas plate 43). The corner area A1b is defined in each of the regions where the bodies 41 to 44 overlap in the stacking direction). Further, in the base plate 41, one through hole H1 is formed in each of the five areas of the central area A1a and the corner areas A1b. In this case, in the hydrogen gas cooling heat exchanger 30 of this example, each through hole H1 of the base plate 41 is formed of a round hole.

  The brine plates 42 are each formed of a metal plate such as stainless steel in a quadrangular shape in plan view. As shown in FIGS. 3 and 4, the brine plate 42 has a central region A2a (an example of a “second central region”) defined in the central region in plan view, and four corners in planar view. A corner area A2b (an example of a "second corner area") is defined in each.

  In addition, a groove forming area A2c (an example of a "second groove forming area") is defined in the brine plate 42 while avoiding the central area A2a and each corner area A2b, and within the groove forming area A2c. A brine passage groove (an example of a "second fluid passage groove") through which brine can pass is formed in the. Note that FIG. 4 illustrates a state in which one large groove (recess) is formed in the groove formation region A2c in order to facilitate understanding of the configuration of the brine plate 42, but in reality, A plurality of narrow-width brine passage grooves are formed side by side in the groove formation region A2c.

  Further, as shown in FIG. 4, the brine plate 42 has through-holes Hi2a through which hydrogen gas that is made to flow toward the hydrogen gas plate 43 can pass, and hydrogen gas discharged from the hydrogen gas plate 43, as described later. Is formed with a through hole Ho2a through which the holes can pass. Further, the brine plate 42 has a through hole Hi2b through which the brine introduced into each brine passage groove in the groove formation region A2c can pass, and a through hole Ho2b through which the brine discharged from each brine passage groove can pass. Has been formed.

  Further, in the brine plate 42, one through hole H2 (an example of “second through hole”) is formed in each of the five areas of the central area A2a and each corner area A2b. In this case, in the hydrogen gas cooling heat exchanger 30 of this example, each through hole H2 of the brine plate 42 is formed of a round hole. Further, the brine plate 42 has a cutout in which the outer edge portion is recessed in the plate surface direction so that at least a part of the cutout N3 in the hydrogen gas plate 43 described later does not overlap in the stacking direction of the plate bodies 41 to 44. A notch N2 (an example of a "second notch portion") is formed (a "second notch portion" is provided as "at least one of the second notch portion and the second recess"). Example).

  The hydrogen gas plate 43 is formed of a metal plate such as stainless steel into a quadrangular shape in plan view, similarly to the brine plate 42 described above. As shown in FIGS. 3 and 4, the hydrogen gas plate 43 has a central area A3a (an example of “first central area”) defined in the central area in plan view and four corners in plan view. A corner area A3b (an example of "first corner area") is defined for each part.

  Further, in the hydrogen gas plate 43, a groove forming area A3c (an example of "first groove forming area") is defined so as to avoid the central area A3a and the corner areas A3b, and the groove forming area A3c is defined. A hydrogen gas passage groove (an example of a “first fluid passage groove”) that allows passage of hydrogen gas is formed therein. Note that, in FIG. 4, in order to facilitate understanding of the configuration of the hydrogen gas plate 43, a state in which one large groove (recess) is formed in the groove formation region A3c is illustrated, but in reality, A plurality of narrow hydrogen gas passage grooves are formed side by side in the groove formation region A2c.

  Further, as shown in FIG. 4, the hydrogen gas plate 43 has a through hole Hi3a through which hydrogen gas to be introduced into each hydrogen gas passage groove in the groove formation region A3c can pass, and is discharged from each hydrogen gas passage groove. A through hole Ho3a through which the generated hydrogen gas can pass is formed. Further, the hydrogen gas plate 43 is formed with a through hole Hi3b through which the brine flown toward the brine plate 42 can pass, and a through hole Ho3b through which the brine discharged from the brine plate 42 can pass.

  Further, in the hydrogen gas plate 43, one through hole H3 (an example of “first through hole”) is formed in each of the five regions, that is, the central region A3a and each corner region A3b. In this case, in the hydrogen gas cooling heat exchanger 30 of this example, each through hole H3 of the hydrogen gas plate 43 is formed of a round hole. Further, the hydrogen gas plate 43 has a cutout in which the outer edge portion is recessed in the plate surface direction so that at least a part of the cutout N2 in the brine plate 42 does not overlap in the stacking direction of the plate bodies 41 to 44. A notch N3 (an example of a "first notch portion") is formed (a "first notch portion" is provided as "at least one of the first notch portion and the first recess"). Example).

  The base plates 44 are each formed of a metal plate such as stainless steel into a rectangular shape in plan view. As shown in FIGS. 2 to 4, the base plate 44 has a central area A4a in a central area (a portion overlapping the central areas A1a to A3a in the stacking direction of the plate bodies 41 to 44) in plan view. Is defined, and the corner areas A4b are defined in four corners in plan view (portions overlapping the corner areas A1b to A3b in the stacking direction of the plate bodies 41 to 44) (hereinafter, referred to as “corner areas A4b”). The central areas A1a to A4a of the plate bodies 41 to 44 are collectively referred to as the central area Aa, and the corner area regions A1b to A4b of the plate bodies 41 to 44 are collectively referred to as the corner area Ab). Further, the base plate 44 is provided with one through hole H4 in each of the five regions, that is, the central region A4a and the corner regions A4b. In this case, in the hydrogen gas cooling heat exchanger 30 of this example, each through hole H4 of the base plate 44 is formed as a round hole.

  Further, as shown in FIGS. 2 and 4, the base plate 44 is provided with a connecting tool capable of connecting the hydrogen gas pipe 4b, and a through hole Hi4a for allowing hydrogen gas to flow into the through holes Hi2a and Hi3a. A fitting for connecting the hydrogen gas pipe 4c is attached, and a through hole Ho4a for discharging the hydrogen gas passed through the through holes Ho2a, Ho3a to the hydrogen gas pipe 4c is formed. Further, the base plate 44 is provided with a connector capable of connecting the brine pipe 13c, and a connector capable of connecting the brine pipe 13d with the through hole Hi4b for allowing the brine to flow into the through holes Hi2b, Hi3b. A through hole Ho4b is formed which is attached and discharges the brine, which has passed through the through holes Ho2b and Ho3b, to the brine pipe 13d.

  In this case, in the hydrogen gas cooling heat exchanger 30 of this example, each brine plate 42 is made of "plates" having the same material and shape, and each hydrogen gas is made of the "plates" having the same material and shape. The plate 43 is configured. Further, in the hydrogen gas cooling heat exchanger 30 of the present example, the plate bodies 41 to 44 are formed so that the shapes and sizes in a plan view are equal to each other. Therefore, the main body 40, which is joined in a state where the plate bodies 41 to 44 are stacked, has a rectangular parallelepiped shape as shown in FIG. Further, in this hydrogen gas cooling heat exchanger 30, as shown in FIG. 3, the through holes H1 to H4 in each of the plate members 41 to 44 have the same inner diameter and the stacking direction of each of the plate members 41 to 44 is the same. Are formed so as to communicate with each other.

  Further, in this hydrogen gas cooling heat exchanger 30, the through holes Hi2a to Hi4a (hereinafter also referred to as "through holes Hia" when not distinguished) in each of the plates 42 to 44 have the same inner shape and size, Moreover, the through holes Ho2a to Ho4a (hereinafter also referred to as "through holes Hoa" when not distinguished) are formed in the plate bodies 42 to 44 so as to be communicated with each other in the stacking direction of the plate bodies 42 to 44. , Are formed to have the same inner shape and size, and to communicate with each other in the stacking direction of the plate bodies 42 to 44.

  Furthermore, in this hydrogen gas cooling heat exchanger 30, the through holes Hi2b to Hi4b (hereinafter, also referred to as “through holes Hib” when not distinguished) in each of the plates 42 to 44 have the same inner shape and size. In addition, the through holes Ho2b to Ho4b (hereinafter also referred to as "through holes Hob" when not distinguished) are formed in the plate bodies 42 to 44 so as to be communicated with each other in the stacking direction of the plate bodies 42 to 44. , Are formed to have the same inner shape and size, and to communicate with each other in the stacking direction of the plate bodies 42 to 44.

  Next, an example of a method of manufacturing the hydrogen gas cooling heat exchanger 30 will be described with reference to the accompanying drawings.

  When manufacturing the heat exchanger 30 for cooling the hydrogen gas, first, a stacking process of stacking the plates 41 to 44 in the "predetermined stacking order" is performed. In this case, as described above, the plate bodies 41 to 44 in the hydrogen gas cooling heat exchanger 30 of the present example are in a state of being communicated with each other in the same inner diameter and in the stacking direction of the plate bodies 41 to 44. Through holes H1 to H4 are formed so that Therefore, as an example, a stacking jig (positioning tool: positioning tool: a cylindrical positioning pin whose outer diameter is slightly smaller than the inner diameter of each of the through holes H1 to H4 is provided upright in correspondence with the position of each of the through holes H1 to H4. (Not shown) is prepared and the plate bodies 41 to 44 are stacked on the stacking jig so that the positioning pins are inserted into the through holes H1 to H4. It is possible to preferably avoid the situation where the plate bodies 41 to 44 are displaced in the plate surface direction.

  Specifically, as an example, first, after mounting the base plate 41 on the stacking jig, the brine plate 42 is stacked on the base plate 41 with the surface for forming the brine passage groove facing upward, and the hydrogen A hydrogen gas plate 43 is laminated on the brine plate 42 with the surface for forming the gas passage groove facing upward. As a result, a set of the laminate including the brine plate 42 and the hydrogen gas plate 43 is laminated on the base plate 41.

  Then, the brine plates 42 and the hydrogen gas plates 43 are alternately laminated on the hydrogen gas plates 43 in the above-mentioned laminate according to the capacity required for the hydrogen gas cooling heat exchanger 30. Subsequently, the brine plate 42 is stacked on the hydrogen gas plate 43 at the top with the surface for forming the brine passage groove facing upward, and the base plate 44 is stacked thereon. With the above, the stacking process is completed.

  In this case, in the hydrogen gas cooling heat exchanger 30 of the present example, as described above, the plate bodies 41 to 44 are formed so that the shapes and sizes in plan view are equal to each other, and the through holes Hia. Have the same inner shape and size and communicate with each other in the stacking direction, the through holes Hoa have the same inner shape and size with each other in the stacking direction, and the through holes Hib have the same inner shape and size. The plate bodies 42 to 44 are configured such that they are in communication with each other in the stacking direction, and the through holes Hob are in communication with each other in the stacking direction with the same inner shape and size.

  Therefore, in the hydrogen gas cooling heat exchanger 30 (main body 40) of the present example, the brine plate 42 and the hydrogen gas plate 43 are prevented from being stacked in an incorrect order during the stacking process, in order to avoid the brine plate 42 from being stacked. Are provided in the outer edge portion of and the outer edge portion of the hydrogen gas plate 43, and notches N2 and N3 that do not overlap at least partially in the stacking direction of the plate bodies 41 to 44 are provided. As a result, when the brine plate 42 and the hydrogen gas plate 43 are alternately laminated on the base plate 41 in the correct order, as shown in FIG. 2, the laminate (member to be the main body portion 40 after the diffusion bonding process described later) of the laminate is formed. On the side surface, the notch N2 of each brine plate 42 is aligned in the stacking direction, and the notch N3 of each hydrogen gas plate 43 is aligned in the stacking direction, with the notch N2 and the notch N3 being alternately positioned. Becomes

  On the other hand, two or more brine plates 42 were accidentally stacked on the base plate 41 or the hydrogen gas plate 43, or the brine plates 42 were accidentally stacked when the hydrogen gas plates 43 should be stacked. At times, the notches N2 and N2 of the brine plates 42 and 42 that are successively stacked are continuous in the stacking direction, and a plurality of brine plates 42 are continuously stacked to the operator. It is possible to surely and easily recognize this.

  Similarly, when two or more hydrogen gas plates 43 are accidentally stacked on the brine plate 42, or when the hydrogen gas plates 43 are accidentally stacked when the brine plates 42 should be stacked. Also, the cutouts N3 and N3 of the hydrogen gas plates 43 and 43 that were successively stacked were continuous in the stacking direction, and a plurality of hydrogen gas plates 43 were continuously stacked to the operator. The state can be surely and easily recognized.

  In the state where the above-mentioned lamination process is completed, as shown in FIG. 3, the central region Aa of each plate body 41 to 44 overlaps in the laminating direction, and the through holes H1 to H4 formed in each central region Aa are laminated. And the corner areas Ab of the plate bodies 41 to 44 overlap in the stacking direction, and the through holes H1 to H4 formed in the corner areas Ab communicate with each other in the stacking direction. Become. Further, the groove forming area A2c of each brine plate 42 and the groove forming area A3c of each hydrogen gas plate 43 overlap in the stacking direction, and the through holes Hia of the plate bodies 42 to 44 are in communication with each other in the stacking direction. The through holes Hoa of the plates 42 to 44 are in communication with each other in the stacking direction, the through holes Hib of the plates 42 to 44 are in communication with each other in the stacking direction, and the through holes Hob of the plates 42 to 44 are stacked. It will be in the state of communicating in the direction.

  Subsequently, the stacked body of the plate bodies 41 to 44 stacked by the above-described stacking processing is housed in a bonding processing apparatus (not shown) and a bonding processing (diffusion bonding processing) is performed. Specifically, in the processing apparatus, the laminated body is pressed in the plate thickness direction of each of the plate bodies 41 to 44 (the laminating direction of each of the plate bodies 41 to 44), and a temperature within a predetermined bonding temperature range is set. While heating the laminated body as described above, the bonding surfaces of the respective plate bodies 41 to 44 are diffusion-bonded by evacuating the inside of the processing apparatus so that the vacuum degree is within a predetermined vacuum degree range.

  At this time, at the time of this bonding process, the plate bodies 41 to 44 are heated and rise in temperature to a very high temperature, so that the plate bodies 41 to 44 thermally expand. In addition, since each plate body 41 to 44 is pressed in the stacking direction, as described above, the plate portions 41 to 44 are formed around the central portion by the presence of the plate body components. It cannot swell significantly along the surface, and the thermal stress generated in the central portion of each plate body 41 to 44 tends to be larger than the thermal stress generated in the outer edge portion.

  On the other hand, through holes H1 to H4 are formed in the central region Aa of each of the plate bodies 41 to 44 constituting the hydrogen gas cooling heat exchanger 30 (main body portion 40) of this example. Therefore, when the plate bodies 41 to 44 are thermally expanded during the joining process, the central portions of these plate bodies expand toward the centers of the through holes H1 to H4 (the through holes H1 to H4 are reduced in diameter). As a result of the deformation, it is avoided that a large thermal stress is generated in the central area Aa of each of the plates 41 to 44. Accordingly, when the heat exchanger 30 for cooling the hydrogen gas of the present example is manufactured, a large distortion does not occur in the central region Aa of each of the plate bodies 41 to 44 during the joining process, and thus the plate body of each of the plate bodies 41 to 44 is not strained. It is possible to reliably join the central area Aa.

  Further, each of the plate bodies 41 to 44 constituting the hydrogen gas cooling heat exchanger 30 (main body portion 40) of the present example is formed in a rectangular shape in plan view. Therefore, when the plate bodies 41 to 44 are heated and thermally expanded during the bonding process, thermal stress concentrates on the corners of the plate bodies 41 to 44, and other portions (portions excluding the corner portion and the central portion). The stress tends to be larger than the thermal stress generated in the.

  On the other hand, through holes H1 to H4 are formed in the corner regions Ab of each of the plate bodies 41 to 44 constituting the hydrogen gas cooling heat exchanger 30 (main body portion 40) of this example. Therefore, when the plate bodies 41 to 44 are thermally expanded during the bonding process, these corners are expanded toward the centers of the through holes H1 to H4 (the through holes H1 to H4 are reduced in diameter). Since the deformation occurs, it is possible to prevent the thermal stress from being concentrated in the corner area Ab of each of the plates 41 to 44. Accordingly, when the heat exchanger 30 for cooling hydrogen gas of the present example is manufactured, a large strain does not occur in each corner area Ab of each plate body 41 to 44 during the joining process, and thus each plate body 41 to 44. It is possible to surely join the corner area Ab.

  In addition, by continuing the pressurization, heating, and evacuation of the inside of the processing device for a predetermined processing time, each of the plate bodies 41 to 44 covers the entire area from the central area Aa to the corner area Ab. When they are joined together with sufficient joining force, the vacuuming is stopped to raise the pressure in the processing equipment to the same level as the atmospheric pressure, and the heating of the stack is stopped, so that the temperature of the stack is lowered to room temperature. Let Further, the pressurization is stopped when the temperature of the laminated body is sufficiently lowered. As a result, the joining process is completed, and the main body 40 is completed as shown in FIGS. After that, a fitting for pipe connection is attached to each of the through holes Hia, Hoa, Hib, Hob of the base plate 44 to complete the hydrogen gas cooling heat exchanger 30.

  In this case, the heat exchanger of this type is subjected to a pressure resistance test of the completed product (inspection of whether or not the plate bodies 41 to 44 are in a good joint state) before the use thereof is started. At this time, in the heat exchanger 30 for cooling the hydrogen gas of the present example, since the through holes H1 to H4 are in communication with each other in the plate thickness direction of the plate bodies 41 to 44, the through holes H1 to H4 are formed. Leak detection port for detecting the presence or absence of leakage of the pressure resistance test fluid (the liquid pumped to the brine channel or the gas pumped to the hydrogen gas channel at the time of inspection) It can be used as a discharge hole and connected to a detector to perform a withstand voltage test. Also, when visually inspecting the joint state of each plate body 41 to 44 using a microscope or the like, by inserting the scope into the through holes H1 to H4, the joint state of the central portion and the four corners of each plate body Can be suitably observed.

  Furthermore, when attaching the non-defective hydrogen gas cooling heat exchanger 30 that has been inspected to the inside of the dispenser 3, by holding the main body 40 by inserting the fixing metal fittings into the through holes H1 to H4, The hydrogen gas cooling heat exchanger 30 can be securely and easily fixed.

  In the hydrogen gas supply system 100 including the hydrogen gas cooling heat exchanger 30, the brine in the brine tank 12 is cooled in the refrigeration circuit 11 (evaporator 24) and is sufficiently low for cooling the hydrogen gas. Maintained at temperature. When the hydrogen gas is supplied (filled) to the air supply target X, the hydrogen gas moved from the gas tank 2 toward the air supply target X is exchanged with brine in the hydrogen gas cooling heat exchanger 30. To be cooled.

  Specifically, the control valve 3a is moved to an open state by a controller (not shown), and the hydrogen gas supplied from the gas tank 2 via the hydrogen gas pipe 4a is cooled by the hydrogen gas pipe 4b. 30 is supplied. Further, in association with the start of the movement of hydrogen gas from the gas tank 2, the liquid feed pump 14 b starts the supply of brine from the brine tank 12 to the hydrogen gas cooling heat exchanger 30 under the control of the control unit 15. Thereby, the amount of brine required for cooling the hydrogen gas is supplied from the brine tank 12 to the hydrogen gas cooling heat exchanger 30 via the brine pipe 13c, and the hydrogen gas is supplied from the connecting tool connected to the through hole Hi4b. It is introduced into the cooling heat exchanger 30. Further, the brine introduced into the hydrogen gas cooling heat exchanger 30 moves into the brine passage groove in the groove formation region A2c of each brine plate 42 through each through hole Hib.

  On the other hand, as described above, the hydrogen gas supplied from the control valve 3a to the hydrogen gas cooling heat exchanger 30 through the hydrogen gas pipe 4b is supplied from the connecting device connected to the through hole Hi4a. It is introduced into the exchanger 30. Further, the hydrogen gas introduced into the hydrogen gas cooling heat exchanger 30 moves into the hydrogen gas passage groove in the groove formation region A3c of each hydrogen gas plate 43 through each through hole Hia. Thereby, heat exchange between the brine moving in the brine passage grooves of each brine plate 42 and the hydrogen gas moving in the hydrogen gas passage trenches in the groove formation region A3c of each hydrogen gas plate 43. The hydrogen gas is cooled by.

  In this case, in the hydrogen gas cooling heat exchanger 30 of the present example, the entire region from the central region Aa to the corner region Ab is joined with a sufficient joining force during the joining process of the respective plates 41 to 44 so that the plates are joined together. The main body portion 40 is formed in a state where 41 to 44 are surely integrated. As a result, not only leakage of brine from the groove for passing brine and leakage of hydrogen gas from the groove for passing hydrogen gas are prevented, but also the thermal conductivity between the brine plate 42 and the hydrogen gas plate 43 is improved. Then, the heat exchange efficiency between the brine and the hydrogen gas (that is, the cooling efficiency of the hydrogen gas) is improved. As a result, the hydrogen gas to be supplied to the air supply target X is reliably and sufficiently cooled in the hydrogen gas cooling heat exchanger 30.

  Further, the hydrogen gas cooled by heat exchange with the brine is discharged from the hydrogen gas passage groove in the groove forming region A3c of each hydrogen gas plate 43 to the through hole Hoa, and from the connecting tool connected to the through hole Ho4a. The target X is supplied with air via the hydrogen gas pipe 4c. As a result, the hydrogen gas whose temperature has been sufficiently lowered in the hydrogen gas cooling heat exchanger 30 is filled in the fuel tank (gas tank) of the air supply target X. As a result, it is possible to sufficiently improve the efficiency of filling the gas X to be supplied with hydrogen gas. Further, the brine whose temperature has risen due to heat exchange with hydrogen gas is discharged from the brine passage groove in the groove formation region A2c of each brine plate 42 to the through hole Hob, and the brine pipe from the connecting tool connected to the through hole Ho4b. It is collected in the brine tank 12 via 13d.

  After that, when the supply of the hydrogen gas to the supply object X is completed, the controller outputs the supply completion signal to the control unit 15 of the hydrogen gas cooling device 1. Along with this, the control unit 15 stops (or reduces the supply amount of) brine from the brine tank 12 to the hydrogen gas cooling heat exchanger 30. With the above, a series of processes relating to the supply of hydrogen gas to the supply target X is completed.

  As described above, in the hydrogen gas cooling heat exchanger 30, the plurality of groove forming regions A3c having the "first fluid passage groove (hydrogen gas passage groove)" through which hydrogen gas can pass are formed. A groove forming area A3c is defined in the hydrogen gas plate 43 while avoiding the central area A3a defined in the central area in plan view, and a through hole H3 is formed in the central area A3a to allow passage of brine. In the plurality of brine plates 42 having the groove forming area A2c in which the "second fluid passage groove (brine passage groove)" is formed, the groove is formed by avoiding the central area A2a defined in the central portion in plan view. The formation area A2c is defined, and the through hole H2 is formed in the central area A2a.

  Therefore, in the hydrogen gas cooling heat exchanger 30, when the plate bodies 41 to 44 are heated and thermally expanded during the bonding process of the plate bodies 41 to 44, the central region A2a of the brine plate 42 and the hydrogen gas are not heated. In the central area A3a of the plate 43 (in this example, all central area Aa of each plate body 41 to 44 including the base plates 41 and 44 in which the through holes H1 and H4 are formed in the central areas A1a and A4a), Since deformation occurs such that the through holes H2 and H3 (through holes H1 to H4) expand toward the center (the through holes H1 to H4 are reduced in diameter), the brine plate 42 and the hydrogen gas plate 43 (each plate). It is avoided that a large thermal stress is generated in the central area Aa of the bodies 41 to 44). For this reason, during the bonding process, a large distortion does not occur in the central region Aa of the brine plate 42 and the hydrogen gas plate 43 (each plate 41 to 44), so that the central region Aa of each plate 41 to 44 is It can be surely joined. Thereby, not only peeling can be preferably avoided in the central region Aa of each plate body 41 to 44, but also the thermal conductivity in the central region Aa between each plate body 41 to 44 is improved, so that the central portion It is possible to sufficiently improve the heat exchange efficiency between the brine and the hydrogen gas in the vicinity of the partial area Aa, that is, the cooling efficiency of the hydrogen gas.

  Further, in this hydrogen gas cooling heat exchanger 30, a groove forming region A3c is formed on the hydrogen gas plate 43 formed in a rectangular shape in plan view, avoiding the four corner regions A3b defined in the corners in plan view. The through-holes H3 are defined in each corner area A3b, and the four corner areas A2b defined in the corners in plan view are avoided in the brine plate 42 formed in a rectangular shape in plan view. The groove forming area A2c is defined by the through hole H2 in each corner area A2b.

  Therefore, in the hydrogen gas cooling heat exchanger 30, when the plate bodies 41 to 44 are heated and thermally expanded during the bonding process of the plate bodies 41 to 44, the corner regions A2b and hydrogen of the brine plate 42 and the hydrogen are cooled. Each corner area A3b of the gas plate 43 (in this example, all the corner areas of each plate body 41 to 44 including the base plates 41 and 44 in which the through holes H1 and H4 are formed in the corner areas A1b and A4b, respectively). In Ab), deformation occurs such that the through holes H2, H3 (through holes H1 to H4) swell toward the center (the through holes H1 to H4 are reduced in diameter), so the brine plate 42 and the hydrogen gas plate It is avoided that large thermal stress is generated in each corner area Ab of 43 (each plate body 41 to 44). For this reason, during the bonding process, in the brine plate 42 and the hydrogen gas plate 43 (each of the plate members 41 to 44), a large strain does not occur in each corner region Ab in which stress is likely to be concentrated, and thus each of the plate members 41 to 44. It is possible to reliably join the respective corner regions Ab. Thereby, it is possible not only to prevent peeling from occurring in each corner region Ab of each plate body 41 to 44, but also to improve the thermal conductivity in each corner region Ab between each plate body 41 to 44. The heat exchange efficiency between the brine and the hydrogen gas in the vicinity of each corner region Ab, that is, the cooling efficiency of the hydrogen gas can be sufficiently improved.

  Further, according to the hydrogen gas cooling heat exchanger 30, since the through holes H2 and H3 are each formed of a round hole, stress is less likely to be concentrated on the rim portions of the through holes H2 and H3, so that the brine plate is reduced. 42 and the hydrogen gas plate 43 do not cause a situation in which cracks occur at the rims of the through holes H2, H3 during thermal expansion or uneven deformation occurs and a good joint state is not formed, and the through holes H2, H3 It is possible to more appropriately bond the vicinity. Further, compared with forming a square hole or the like as the “first through hole” or the “second through hole”, since these holes can be formed uniformly and easily, the heat for cooling the hydrogen gas can be reduced. The manufacturing cost of the exchanger 30 can be sufficiently reduced.

  In addition, according to the hydrogen gas cooling heat exchanger 30, a plurality of hydrogen gas plates 43 having the same material and shape and a plurality of the same material and shape are formed as “a plurality of plates”. The configuration including the brine plate 42 of No. 1 and a plurality of types of “first plate bodies” having different materials and shapes, and a plurality of types having different materials and shapes Compared to the configuration including the “second plate body”, by unifying the material and shape, it is possible to reduce the production cost of the brine plate 42 and the hydrogen gas plate 43. The manufacturing cost of the gas-cooling heat exchanger 30 can be sufficiently reduced, and the materials and shapes are equal to each other, so that each of the brine plates 4 at the time of the joining process is performed. Have the same thermal expansion state, and the hydrogen gas plates 43 have the same thermal expansion state at the time of the bonding process, and the degree and direction of the strains generated in the hydrogen gas plates 43 are the same. ~ 44 can be joined more suitably.

  Further, in this hydrogen gas cooling heat exchanger 30, notch portions N3 in which the outer edge portion is recessed in the plate surface direction are formed in each hydrogen gas plate 43, and in each notch portion N3 in each hydrogen gas plate 43. On the other hand, each blind plate 42 is formed with a notch N2 having an outer edge recessed in the plate surface direction so that at least a part of each plate body 41 to 44 does not overlap in the stacking direction.

  Therefore, according to the hydrogen gas cooling heat exchanger 30, when the stacking order and the stacking direction of the brine plate 42 and the hydrogen gas plate 43 are erroneous in the stacking process at the time of manufacturing the hydrogen gas cooling heat exchanger 30. In addition, since the arrangement state of the notches N2 and N3 becomes non-uniform, it is possible to make the operator surely and easily recognize that the stacking order and the stacking direction are wrong.

  Further, according to the heat exchanger 30 for cooling the hydrogen gas, the hydrogen gas as the “fluid to be cooled” can be cooled, so that the high-pressure hydrogen gas is introduced during the cooling process. In the container 30, while avoiding leakage of hydrogen gas due to peeling of the plate bodies 41 to 44, the plate bodies 41 to 44 are preferably joined and the thermal conductivity between the plate bodies 41 to 44 is reduced. By improving, hydrogen gas can be cooled appropriately.

  Next, another embodiment of the “plate heat exchanger” will be described with reference to the accompanying drawings.

  In addition, about the component which has the same function as the component of the above-mentioned hydrogen gas cooling heat exchanger 30, the same code | symbol is attached | subjected and the overlapping description is abbreviate | omitted. The components other than the heat exchanger 30 for cooling the hydrogen gas in the hydrogen gas supply system 100 (hydrogen gas cooling device 1) are the same as those in the above-described example including the heat exchanger 30 for cooling the hydrogen gas. Therefore, detailed description is omitted.

  The heat exchanger 30A for cooling hydrogen gas shown in FIGS. 5 and 6 is another example of the “plate heat exchanger”, and is a brine plate 42 of the heat exchanger 30 for cooling hydrogen gas (main body 40) described above. Further, instead of the hydrogen gas plate 43, a brine plate 42a and a hydrogen gas plate 43a are provided to form the main body 40a. In this case, in the hydrogen gas cooling heat exchanger 30A (main body 40a), the base plate 41, the brine plate 42a, the hydrogen gas plate 43a, and the base plate 44 correspond to "plates". In the following description, the base plate 41, the brine plate 42a, the hydrogen gas plate 43a, and the base plate 44 are also collectively referred to as “plates 41 to 44”.

  The brine plates 42a are each formed in a rectangular shape in a plan view by a metal plate such as stainless steel similarly to the brine plate 42 in the hydrogen gas cooling heat exchanger 30 described above. The brine plate 42a is configured in the same manner as the brine plate 42, except that a recess C2, which is an example of a "second recess", is formed in place of the notch N2 in the brine plate 42. Specifically, the brine plate 42a has an outer edge portion of the plate surface (this example) so that at least a part of the brine plate 42a does not overlap the recess C3 in the hydrogen gas plate 43a described later in the stacking direction of the plate bodies 41 to 44. In, a concave portion C2 is formed by denting the outer edge portion of the surface for forming the brine passage groove in the plate thickness direction ("at least one of the second cutout portion and the second concave portion" is referred to as "second portion"). Example of a configuration including a "recess".

  Similar to the hydrogen gas plate 43 in the hydrogen gas cooling heat exchanger 30 described above, the hydrogen gas plate 43a is formed of a metal plate such as stainless steel in a plan view shape. The hydrogen gas plate 43a is configured in the same manner as the hydrogen gas plate 43, except that a recess C3 that is an example of a "first recess" is formed in place of the notch N3 in the hydrogen gas plate 43. . Specifically, the hydrogen gas plate 43a includes an outer edge portion of the plate surface (this example) so that at least a part of the hydrogen gas plate 43a does not overlap the recess C2 of the brine plate 42a in the stacking direction of the plate bodies 41 to 44. In, a recess C3 is formed by recessing the outer edge portion of the surface on which the hydrogen gas passage groove is formed in the plate thickness direction ("at least one of the first cutout portion and the first recess portion" is referred to as "first portion"). Example of the configuration including the "recess".

  At the time of manufacturing the hydrogen gas cooling heat exchanger 30A, first, the brine plates 42a and the hydrogen gas plates 43a are alternately stacked on the base plate 41 in the same manner as at the time of manufacturing the hydrogen gas cooling heat exchanger 30 described above. Then, the laminating process of laminating the base plate 44 on the uppermost brine plate 42a is performed.

  In this case, in this hydrogen gas cooling heat exchanger 30A (main body 40a), in order to avoid stacking the brine plate 42a and the hydrogen gas plate 43a in the wrong order during the stacking process, the outer edge of the brine plate 42a is avoided. Further, concave portions C2 and C3 that do not at least partially overlap each other in the stacking direction of the plate bodies 41 to 44 are provided on the outer edge portion of the hydrogen gas plate 43a. Thereby, when the brine plate 42a and the hydrogen gas plate 43a are alternately laminated on the base plate 41 in the correct order, as shown in FIG. 5, the laminate (member to be the main body portion 40a after the diffusion bonding process described later) of On the side surface, the recesses C2 and the recesses C3 are alternately positioned with the recesses C2 of the brine plates 42a aligned in the stacking direction and the recesses C3 of the hydrogen gas plates 43a aligned in the stacking direction.

  On the other hand, two or more brine plates 42a are mistakenly stacked on the base plate 41 or the hydrogen gas plate 43a, or the brine plates 42a are mistakenly stacked when the hydrogen gas plates 43a should be stacked. At some times, the recesses C2, C2 of the brine plates 42a, 42a that are successively stacked are in a continuous state in the stacking direction, and a plurality of brine plates 42a are continuously stacked for the worker. Can be recognized reliably and easily.

  Similarly, when two or more hydrogen gas plates 43a are accidentally stacked on the brine plate 42a, or when the hydrogen gas plates 43a are accidentally stacked when the brine plates 42a should be stacked. Also, the recesses C3, C3 of the hydrogen gas plates 43a, 43a that are continuously stacked are continuous in the stacking direction, and a plurality of hydrogen gas plates 43a are continuously stacked for the worker. Can be surely and easily recognized.

  As a result, even when the hydrogen gas cooling heat exchanger 30A is manufactured, the plate bodies 41 to 44 are correctly stacked in the same stacking order as in the stacking process when the hydrogen gas cooling heat exchanger 30 is manufactured. It is possible to stack accurately. Thereafter, the laminated bodies of the plate bodies 41 to 44, for which the laminating process has been completed, are housed in a joining processing device (not shown) and a joining process (diffusion joining process) is performed to join the joining surfaces of the plate bodies 41 to 44 to each other. Diffusion bonded. As a result, the joining process is completed, and the main body 40 is completed as shown in FIG. In addition, regarding the principle that the entire region from the central region Aa to the corner regions Ab of the plate bodies 41 to 44 is reliably joined due to the presence of the through holes H1 to H4 during the joining process, the hydrogen gas cooling heat exchanger is described. Since the principle of the bonding process at the time of manufacturing 30 is the same, detailed description will be omitted. After that, a fitting for pipe connection is attached to each of the through holes Hia, Hoa, Hib, Hob of the base plate 44 to complete the hydrogen gas cooling heat exchanger 30A.

  As described above, in this hydrogen gas cooling heat exchanger 30A, the recesses C3 in which the outer edge of the plate surface is recessed in the plate thickness direction are formed in each hydrogen gas plate 43a, and the recess C3 in each hydrogen gas plate 43a is formed. On the other hand, each blind plate 42a is formed with a recess C2 in which the outer edge of the plate surface is recessed in the plate thickness direction so that at least some of the plate members 41, 42a, 43a, 44 do not overlap in the stacking direction. ing.

  Therefore, according to the hydrogen gas cooling heat exchanger 30A, when the stacking order or the stacking direction of the brine plate 42a and the hydrogen gas plate 43a is incorrect in the stacking process during the manufacturing of the hydrogen gas cooling heat exchanger 30. In addition, since the concave portions C2, C3 are arranged in an uneven state, it is possible for the operator to surely and easily recognize that the stacking order and the stacking direction are wrong.

  The "plate heat exchanger" is not limited to the example of the configuration of the hydrogen gas cooling heat exchangers 30 and 30A.

  For example, a configuration in which one through hole H2 is formed in the central region A2a of the brine plates 42 and 42a and one through hole H3 is formed in the central region A3a of the hydrogen gas plates 43 and 43a is described as an example. However, a plurality of "first through holes" are formed in the "first central region" of the "first plate", or the "second central region" of the "second plate" is formed. It is also possible to form a plurality of “second through holes” (not shown).

  In this case, regarding the “first through hole” formed in the “first central area” and the “second through hole” formed in the “second central area”, the number formed in the area Regardless of the "first plate" or the "second plate", it is formed at a position deviated from the center (a position where the center of the through hole does not overlap with the center of the plate), so that the "first plate" is formed. When the front surface and the back surface are erroneously stacked during the stacking operation of the “plate” and the “second plate”, the “through holes” do not communicate with each other. This makes it possible to prevent work mistakes and correctly stack the “first plate” and the “second plate”.

  Also, an example is used in which one through hole H2 is formed in each corner area A2b of the brine plates 42, 42a, and one through hole H3 is formed in each corner area A3b of the hydrogen gas plates 43, 43a. As described above, a plurality of “first through holes” are formed in at least one of the “first corner regions” of the “first plate body”, or the “second plate body” is formed. It is also possible to form a plurality of "second through holes" in at least one of the "second respective corner regions" in (not shown).

  In this case, regarding the “first through hole” formed in the “first corner area” and the “second through hole” formed in the “second corner area”, the four “corner areas” A configuration in which no "through hole" is provided in any one of them, or a distance from the outer edge of any "through hole" of the four "corner areas" is formed in another "corner area" By adopting a configuration that is different from the distance from the outer edge of the "through hole", when the front surface and the back surface are erroneously stacked during the stacking operation of the "first plate body" and the "second plate body". For example, the "through holes" are not in communication with each other. This makes it possible to prevent work mistakes and correctly stack the “first plate” and the “second plate”.

  Further, the “first through hole” and the “second through hole” are not limited to the round holes like the through holes H2 and H3 in the above example, but may be elliptical holes or rounded corners. It can be a square hole (not shown). Further, when the thermal stress generated at the time of joining is not so large, it may be a square hole having sharp corners (not shown). Furthermore, a configuration in which the "first through hole" is not formed in each "first corner area" of the "first plate body" or each "second corner area" of the "second plate body" It is also possible to adopt a configuration in which the "second through hole" is not formed in (not shown). It is also possible to adopt a configuration in which the through holes H1 and H4 (holes similar to the “first through hole” and the “second through hole”) are not formed in the base plates 41 and 44 (not shown).

  Further, an example in which the main body portion 40, 40a is configured to include a plurality of brine plates 42, 42a formed of the same material and shape and a plurality of hydrogen gas plates 43, 43a formed of the same material and shape. However, a plurality of types of “first plate bodies” having different materials (or both shapes) and a plurality of types of “second plate bodies having different materials (or both)” have been described. It can also be configured by including a “plate” (none of which is shown).

  Further, the heat exchanger 30 for cooling hydrogen gas in which the cutout N2 is formed in the brine plate 42 and the cutout N3 in the hydrogen gas plate 43, and the recess C2 is formed in the brine plate 42a, and the hydrogen gas plate 43a is formed. Although the configuration of the hydrogen gas cooling heat exchanger 30A having the recess C3 formed therein has been described as an example, the "first notch" is formed in the "first plate body" and the "second plate" is formed. A configuration in which a "second recess" is formed in the "plate", or a "first recess" is formed in the "first plate" and a "second cutout" is formed in the "second plate" It is also possible to adopt a configuration in which "" is formed (neither is shown). Further, for at least one of the "first cutout portion" and the "first recess" formed in the "first plate body", the "second cutout" formed in the "second plate body". It is also possible to adopt a configuration in which at least one of the "part" and the "second recess" does not entirely overlap in the stacking direction (not shown).

  Furthermore, at least one of a "first cutout portion" and a "first recess" is formed in the "first plate body", and a "second cutout portion" and a "second cutout portion" are formed in the "second plate body". A configuration in which none of the "second recesses" is formed, or a "second plate" in which neither the "first cutout portion" nor the "first recess" is formed It is also possible to adopt a configuration in which at least one of the "second cutout portion" and the "second recessed portion" is formed in the "body" (both not shown).

  Further, the formation position of the "first cutout portion" or the "first recess" formed in the "first plate body" or the "second cutout portion" formed in the "second plate body". Alternatively, by setting the formation position of the "second recess" to be a position deviated from the center portion in the width direction of the "first plate" or the "second plate", the "first plate" or the "second plate" When the front surface and the back surface are erroneously stacked during the stacking operation of the “second plate body”, the “notch portion” and the “recessed portion” are not aligned in the stacking direction. This makes it possible to prevent work mistakes and correctly stack the “first plate” and the “second plate”.

  Further, an example of the hydrogen gas cooling heat exchangers 30 and 30A configured by including a plurality of “first plate bodies” and a plurality of “second plate bodies” has been described. A "plate heat exchanger" is configured by including a "first plate body" and a plurality of "second plate bodies", or a plurality of "first plate bodies" and a "second plate body". "Plate type heat exchanger" is provided with the "plate body", and a "plate type heat exchanger" is provided with one "first plate body" and one "second plate body". Can also be configured (both not shown).

  Furthermore, the configuration of the hydrogen gas cooling heat exchangers 30 and 30A in which the "first plate body" and the "second plate body" are laminated so as to be in direct contact with each other and the main body portions 40 and 40a are formed is given as an example. As described above, an "optional function" such as a "partition plate" is provided between the "first plate (hydrogen gas passage groove plate)" and the "second plate (brine passage groove plate)". It is also possible to sandwich the "plate having" and configure the "main body" (not shown). In this case, when a configuration in which a plate body such as a “partition plate” is sandwiched between the “first plate body” and the “second plate body” is adopted, the “plate body” also has the “first plate body”. A "through hole" corresponding to the "first through hole" in the "body" and the "second through hole" in the "second plate body" is formed, and a large strain is generated in the "plate body" during the joining process. Is preferably avoided.

  Further, the hydrogen gas cooling heat exchanger 30 used in the hydrogen gas cooling device 1 configured to cool the brine, which is an example of the “cooling fluid”, by the refrigeration circuit 11 that is an example of the “unified refrigeration circuit” is given as an example. As described above, by cooling the condenser of the second refrigeration circuit (low temperature side refrigeration circuit) by the evaporator of the first refrigeration circuit (high temperature side refrigeration circuit), it is sufficient for the condenser of the second refrigeration circuit. By condensing a certain amount of refrigerant in a short time and cooling the "cooling fluid" by the evaporator of the second refrigeration circuit, the temperature of the "cooling fluid" is lowered to a sufficiently low temperature suitable for cooling hydrogen gas. Using a hydrogen gas cooling heat exchanger 30, 30A or the like as a "plate type heat exchanger" used in a "hydrogen gas cooling device" (not shown) equipped with a "binary refrigeration circuit" capable of reducing the temperature be able to.

  Further, the configuration of the hydrogen gas cooling heat exchangers 30 and 30A for cooling the hydrogen gas by heat exchange with brine, which is an example of the "cooling fluid", has been described as an example, but as the "cooling fluid", Even when the "plate heat exchanger" is manufactured so that it can be used in a cooling method (so-called refrigerant direct cooling type cooling method) of cooling hydrogen gas using a refrigerant (fluorocarbon gas or the like) in the refrigeration circuit 11 or the like, The same configuration as that of the hydrogen gas cooling heat exchangers 30 and 30A can be adopted. In addition, also when manufacturing the "plate heat exchanger" capable of cooling any fluid (liquid or gas) other than hydrogen gas as the "fluid to be cooled", the above-mentioned hydrogen gas cooling heat exchanger 30 , 30A can be adopted.

100 Hydrogen Gas Supply System 1 Hydrogen Gas Cooling Device 30, 30A Hydrogen Gas Cooling Heat Exchanger 40, 40a Main Body 41 Base Plate 42, 42a Brine Plate 43, 43a Hydrogen Gas Plate 44 Base Plate 44
A1a to A4a Central area A1b to A4b Corner area A2c, A3c Groove forming area C2, C3 Recesses H1 to H4, Hi2a to Hi4a, Hi2b to Hi4b, Ho2a to Ho4a, Ho2b to Ho4b Through hole N2, N3 Notch Air supply target

Claims (6)

One or a plurality of first plate bodies having a first groove forming region in which a first fluid passage groove through which the fluid to be cooled can pass is formed, and a second fluid through which the cooling fluid can pass. A plurality of plate bodies including at least one or a plurality of second plate bodies each having a second groove forming region in which a passage groove is formed are stacked in a predetermined stacking order, Cooling the fluid to be cooled by heat exchange between the fluid to be cooled which has the joining surfaces joined to each other and passes through the first fluid passage groove and the fluid to be cooled passing through the second fluid passage groove. A plate heat exchanger configured to be possible,
In the first plate body, the first groove forming region is defined so as to avoid the first central region defined in the central part in plan view, and at least the first groove forming region is defined in the first central region. One first through hole is formed,
In the second plate body, the second groove forming region is defined so as to avoid the second central region defined in the central portion in plan view, and at least the second central region is defined in the second central region. A plate heat exchanger in which one second through hole is formed. The first plate body is formed in a rectangular shape in a plan view, and the first groove is formed in the first plate body while avoiding four first corner regions defined by corners in a plan view. A formation region is defined, and at least one first through hole is formed in each of the first corner regions,
The second plate body is formed in a rectangular shape in a plan view, and the second groove is provided in the second plate body while avoiding four second corner regions defined by corners in a plan view. The plate heat exchanger according to claim 1, wherein a formation region is defined and at least one second through hole is formed in each of the second corner regions.   3. The plate heat exchanger according to claim 1, wherein the first through hole is a round hole and the second through hole is a round hole.   As the plurality of plates, a plurality of the first plates having the same material and shape are formed, and a plurality of the second plates having the same material and shape are formed. The plate heat exchanger according to any one of claims 1 to 3. Each of the first plate bodies has at least one of a first cutout portion in which an outer edge portion is recessed in the plate surface direction and a first recessed portion in which the outer edge portion of the plate surface is recessed in the plate thickness direction. Each formed,
An outer edge of each of the second plate bodies is recessed in the plate surface direction so that at least a part of the at least one of the first plate bodies does not overlap in the stacking direction of the plate bodies. The plate heat exchanger according to claim 4, wherein at least one of the second cutout portion and the second recessed portion in which the outer edge portion of the plate surface is recessed in the plate thickness direction is formed.   The plate heat exchanger according to any one of claims 1 to 5, which is configured to be able to cool hydrogen gas as the fluid to be cooled.

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