Ion exchanger and cooling system of fuel cell

Abstract

To prevent deformation of an exchanger body caused by an increase of an inner pressure of the exchanger body.SOLUTION: An ion exchanger 34 is mounted to a cooling system and removes electric charge from cooling water, the cooling system comprising: a fuel cell; a circulation channel that circulates the cooling water with the fuel cell; and a pump that regulates a flow rate of the cooling water circulated between the fuel cell and the circulation channel. The ion exchanger 34 comprises: an exchanger body 40 in which an ion exchanging filter 43 is housed and which has a shape extending in an axial direction X; a first extending member 61 disposed along a first end 40a of the exchanger body 40 in the axial direction X; a second extending member 62 disposed along a second end 40b of the exchanger body 40 in the axial direction and sandwiching the exchanger body 40 in the axial direction X together with the first extending member 61; and a restricting member 70 that restricts the first extending member 61 and the second extending member 62 so that the first extending member 61 and the second extending member 62 do not separate from each other in the axial direction X.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a cooling system for an ion exchanger and a fuel cell. [Background technology]

[0002] The fuel cell cooling system described in Patent Document 1 includes a fuel cell, a circulation flow path, a pump, and an ion exchanger. The circulation flow path circulates cooling water between the fuel cell and the circulation flow path. The pump adjusts the flow rate of the cooling water circulated between the fuel cell and the circulation flow path. The ion exchanger removes electric charges from the cooling water. The ion exchanger includes, for example, an exchanger body with an ion exchange filter housed therein. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2013-233499 A Summary of the Invention [Problem to be solved by the invention]

[0004] When cooling water is circulated through the circulation flow path by driving the pump, the internal pressure of the circulation flow path and the exchanger body increases. When the internal pressure of the exchanger body increases, a load from the inside to the outside of the exchanger body acts on the exchanger body. If the load acting on the exchanger body is large, there is a risk that the exchanger body will deform. Therefore, it has been desired to take measures against the load acting on the exchanger body. [Means for solving the problem]

[0005] The ion exchanger for solving the above problem is an ion exchanger that is mounted on a cooling system including a fuel cell, a circulation flow path that circulates cooling water between the fuel cell, and a pump that adjusts the flow rate of the cooling water circulated between the fuel cell and the circulation flow path, and removes electric charges from the cooling water, and is characterized in that it comprises an exchanger body that has an ion exchange filter housed therein and has a shape that extends in the axial direction, a first extension member that is provided along a first end of the exchanger body in the axial direction, a second extension member that is provided along a second end of the exchanger body in the axial direction and that sandwiches the exchanger body in the axial direction together with the first extension member, and a regulating member that regulates the first extension member and the second extension member so that the first extension member and the second extension member do not move away from each other in the axial direction.

[0006] A fuel cell cooling system for solving the above problem is characterized by comprising a fuel cell, a circulation flow path for circulating cooling water between the fuel cell, a pump for adjusting the flow rate of the cooling water circulated between the fuel cell and the circulation flow path, and the above-mentioned ion exchanger.

[0007] According to each of the above configurations, even when the internal pressure of the exchanger body increases due to the drive of the pump, the first extension member and the second extension member are unlikely to separate from each other in the axial direction. Even when the internal pressure of the exchanger body increases, the first extension member and the second extension member can suppress deformation of the exchanger body in the axial direction. Therefore, deformation of the exchanger body caused by the increase in internal pressure of the exchanger body can be suppressed.

[0008] In the above ion exchanger, a first through hole is formed in the first extension member, and a second through hole is formed in the second extension member, and the regulating member may be a through bolt that is inserted into the first through hole and the second through hole to integrally fasten the first extension member and the second extension member.

[0009] According to the above configuration, by varying the position of the regulating member inserted into either the first through hole or the second through hole, it is possible to accommodate exchanger bodies having different axial dimensions. Therefore, it is not necessary to prepare a plurality of regulating members having different dimensions according to the axial dimensions of the exchanger body, and therefore the cost related to the regulating members can be reduced.

[0010] In the above ion exchanger, the exchanger body includes a main body portion having an accommodation space therein for accommodating the ion exchange filter and an opening communicating with the accommodation space, and a lid portion closing the opening, the main body portion having a bottom portion and a cylindrical portion extending from the bottom portion in the axial direction, the opening portion being defined by an end portion of the cylindrical portion opposite the bottom portion in the axial direction, the lid portion being located at the first end, the bottom portion being located at the second end, and the first extension member being provided along the lid portion in the axial direction, The second extension member may be provided along the bottom portion in the axial direction.

[0011] According to the above configuration, when a large axial load acts on the exchanger body, the exchanger body may be deformed in the axial direction, such as the cover coming off the opening or the cover deforming in the axial direction. However, this can be suppressed. In addition, by removing the cover from the body, maintenance of the ion exchange filter can be performed through the opening. Therefore, the cost of maintaining the ion exchange filter can be reduced compared to when the exchanger body is replaced for maintenance of the ion exchange filter.

[0012] In the above ion exchanger, the exchanger body includes a bottom and a cylindrical portion extending in the axial direction from the bottom, the bottom being located at the second end, the second extension member having an extended main body portion provided along the bottom and an extended protrusion portion protruding from the extended main body portion in an orthogonal direction perpendicular to the axis of the cylindrical portion, and the ion exchanger may be provided with a bracket fixed to the exchanger body, the bracket having a bracket extension portion provided along the extended main body portion and a bracket protrusion portion protruding from the bracket extension portion and extending in the axial direction so as to be adjacent to the extended protrusion portion in the orthogonal direction.

[0013] According to the above configuration, the extending protrusion and the bracket protrusion come into contact with each other, so that the displacement of the exchanger body in the orthogonal direction can be suppressed. Effect of the Invention

[0014] According to the present invention, deformation of the exchanger body caused by an increase in the internal pressure of the exchanger body can be suppressed. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a schematic diagram showing a cooling system for a fuel cell. [Diagram 2] FIG. 2 is a side view showing the ion exchanger. [Diagram 3] FIG. 3 is a side view showing the ion exchanger. [Figure 4] FIG. 4 is an exploded perspective view showing the ion exchanger. [Diagram 5] FIG. 5 is a top view showing the ion exchanger. [Figure 6] FIG. 6 is a bottom view showing the ion exchanger. [Figure 7] FIG. 7 is a perspective view partially showing an ion exchanger. [Figure 8] FIG. 8 is a perspective view partially showing the ion exchanger. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] An embodiment of an ion exchanger and a cooling system for a fuel cell will be described below with reference to the drawings. For ease of explanation, the cooling system for the fuel cell will be described first, followed by details of the ion exchanger. In the following, the cooling system for the fuel cell will also be simply referred to as the cooling system.

[0017] <Overall configuration of fuel cell cooling system> 1, the cooling system 10 includes a fuel cell 30, a circulation flow path 50, a pump 32, and an ion exchanger 34. In other words, the ion exchanger 34 is mounted on the cooling system 10. The cooling system 10 in this embodiment includes a bypass flow path 53 and a control unit 64. The cooling system 10 in this embodiment includes a fan 29 and a radiator 31. The cooling system 10 in this embodiment is mounted on an industrial vehicle such as a forklift, for example.

[0018] The fan 29 is disposed, for example, adjacent to the radiator 31. The fan 29 rotates to generate an air flow toward the radiator 31. In response to this air flow, the radiator 31 exchanges heat between the coolant and the outside air.

[0019] The circulation flow path 50 circulates the cooling water between the fuel cell 30. The circulation flow path 50 includes a supply flow path 51 and a discharge flow path 52. The supply flow path 51 and the discharge flow path 52 each extend between the fuel cell 30 and the radiator 31. Thus, the circulation flow path 50 is connected to the fuel cell 30 and the radiator 31.

[0020] The supply flow path 51 is a flow path through which the cooling water that has undergone heat exchange in the radiator 31 flows from the radiator 31 to the fuel cell 30. That is, the supply flow path 51 is a flow path that supplies the cooling water to the fuel cell 30. For example, the cooling water that flows through the supply flow path 51 is the cooling water that has been cooled by heat exchange with the outside air in the radiator 31. The discharge flow path 52 is a flow path through which the cooling water that has undergone heat exchange in the fuel cell 30 flows from the fuel cell 30 to the radiator 31. That is, the discharge flow path 52 is a flow path through which the cooling water is discharged from the fuel cell 30. For example, the cooling water that flows through the discharge flow path 52 is the cooling water that has been heated by heat exchange with the fuel cell 30. Note that in FIG. 1, the flow of the cooling water is indicated by solid black arrows.

[0021] The pump 32 is provided in the supply flow path 51. The pump 32 is provided downstream of the radiator 31 and upstream of the fuel cell 30 in the flow direction of the cooling water in the supply flow path 51. The pump 32 pumps the cooling water to cause the cooling water to flow through the supply flow path 51 and the discharge flow path 52. In this way, the pump 32 adjusts the flow rate of the cooling water circulated between the fuel cell 30 and the circulation flow path 50.

[0022] The bypass flow passage 53 is connected to the supply flow passage 51 and the discharge flow passage 52. Therefore, the bypass flow passage 53 connects the supply flow passage 51 and the discharge flow passage 52. The bypass flow passage 53 includes a bypass upstream flow passage 53a and a bypass downstream flow passage 53b. In the flow direction of the cooling water in the bypass flow passage 53, the upstream end of the bypass upstream flow passage 53a functions as the upstream end of the bypass flow passage 53 and is connected to the supply flow passage 51. In the flow direction of the cooling water in the bypass flow passage 53, the downstream end of the bypass downstream flow passage 53b functions as the downstream end of the bypass flow passage 53 and is connected to the discharge flow passage 52.

[0023] The ion exchanger 34 removes electric charges from the cooling water. In this embodiment, the ion exchanger 34 is provided in the bypass flow path 53. Therefore, the ion exchanger 34 removes electric charges from the cooling water flowing through the bypass flow path 53. In the flow direction of the cooling water in the bypass flow path 53, the downstream end of the bypass upstream flow path 53a and the upstream end of the bypass downstream flow path 53b are connected to the ion exchanger 34.

[0024] The control unit 64 includes a processor (not shown), such as a CPU or GPU, and a storage unit (not shown), such as a RAM and a ROM. The storage unit stores program code or instructions configured to cause the processor to execute processing. The storage unit, i.e., computer-readable medium, includes any available medium accessible by a general-purpose or special-purpose computer. The control unit 64 may be configured by a hardware circuit, such as an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). The control unit 64, which is a processing circuit, may include one or more processors that operate according to a computer program, one or more hardware circuits such as an ASIC or an FPGA, or a combination thereof.

[0025] The control unit 64 is electrically connected to the pump 32. The control unit 64 controls the operation of the pump 32. The control unit 64 controls the pump 32, whereby the pump 32 adjusts the flow rate of the cooling water circulated between the fuel cell 30 and the circulation flow path 50.

[0026] For example, air containing oxygen is supplied from an air compressor (not shown) through an air flow path (not shown) to the fuel cell 30. For example, hydrogen gas is supplied from a hydrogen tank (not shown) through a hydrogen flow path (not shown) to the fuel cell 30. For example, the hydrogen flow path is provided with a flow rate change valve that changes the flow rate of hydrogen gas in the hydrogen flow path.

[0027] The control unit 64 adjusts the amount of oxygen supplied to the fuel cell 30, for example, by controlling the discharge rate of an air compressor. The control unit 64 adjusts the amount of hydrogen gas supplied to the fuel cell 30, for example, by controlling the opening degree of a flow rate control valve. In this way, the control unit 64 may switch between generating power and stopping power generation in the fuel cell 30 and control the amount of power generation of the fuel cell 30 by adjusting the amount of oxygen and the amount of hydrogen gas supplied to the fuel cell 30.

[0028] <Cooling water flow> In the radiator 31, the cooling water is cooled by receiving the air flow by the fan 29. The cooling water cooled by the radiator 31 flows through the supply flow path 51 and then flows from the supply flow path 51 into the fuel cell 30. The fuel cell 30 is cooled by heat exchange between the fuel cell 30 and the cooling water. The cooling water warmed by heat exchange with the fuel cell 30 flows through the discharge flow path 52 and then flows from the discharge flow path 52 into the radiator 31. In this way, the cooling water is circulated under closed conditions such as the radiator 31, the circulation flow path 50, and the fuel cell 30. In the radiator 31, the circulation flow path 50, and the fuel cell 30 in this embodiment, the cooling water is not supplied or discharged between the outside of the cooling system 10. Therefore, the cooling system 10 in this embodiment is configured to circulate through the cooling system 10 under closed conditions.

[0029] A part of the cooling water flowing through the supply flow path 51 flows from the supply flow path 51 into the bypass flow path 53 before flowing into the fuel cell 30. The cooling water that flows into the bypass flow path 53 flows through the bypass upstream flow path 53a, the ion exchanger 34, and the bypass downstream flow path 53b in this order. In the ion exchanger 34, the charge of the cooling water is removed. Therefore, the cooling water whose charge has been removed by the ion exchanger 34 flows through the bypass downstream flow path 53b. The cooling water flowing through the bypass downstream flow path 53b flows from the bypass downstream flow path 53b into the discharge flow path 52. In the discharge flow path 52, the cooling water that has flowed into the discharge flow path 52 from the fuel cell 30 and the cooling water that has flowed into the discharge flow path 52 from the bypass flow path 53 join together. In this way, the charge of a part of the cooling water flowing through the circulation flow path 50 is removed by the ion exchanger 34.

[0030] <Ion exchanger details> 2 and 3, the ion exchanger 34 includes an exchanger body 40, a first extending member 61, a second extending member 62, and a restricting member 70. Furthermore, the ion exchanger 34 in this embodiment includes a bracket 80.

[0031] <Exchanger body> As shown in Fig. 4, the exchanger body 40 has a main body portion 41 and a lid portion 42. The main body portion 41 and the lid portion 42 are made of, for example, resin. The main body portion 41 has an accommodation space S therein in which the ion exchange filter 43 is accommodated. In other words, the exchanger body 40 accommodates the ion exchange filter 43 therein. The main body portion 41 has an opening portion 41a that communicates with the accommodation space S. The ion exchange filter 43 can be accommodated in the accommodation space S of the main body portion 41, for example, from the opening portion 41a.

[0032] The main body 41 has a bottom 44 and a tubular portion 45. In other words, the exchanger body 40 includes the bottom 44 and the tubular portion 45. The tubular portion 45 is tubular extending in the axial direction X. Therefore, the exchanger body 40 has a shape extending in the axial direction X. In this embodiment, the axial direction X is the direction in which the axis L of the tubular portion 45 extends. The tubular portion 45 in this embodiment is cylindrical.

[0033] The bottom 44 is, for example, flat. When the bottom 44 is viewed from the axial direction X, the bottom 44 is circular. The bottom 44 extends, for example, perpendicular to the axial direction X. The tubular portion 45 extends from the bottom 44 in the axial direction X. In detail, the tubular portion 45 extends from the periphery of the bottom 44 in the axial direction X. As a result, the storage space S is defined inside the main body 41 by the inner surface of the bottom 44 and the inner peripheral surface of the tubular portion 45. The opening 41a is defined by the end portion 45a, which is the end portion of the tubular portion 45 opposite to the bottom 44 in the axial direction X. Therefore, the opening 41a in this embodiment is a circular hole with the end portion 45a as the outer edge.

[0034] The main body 41 in this embodiment has a first pipe 45b. The first pipe 45b extends in the axial direction X inside the main body 41. The first pipe 45b has open ends in the axial direction X. The first pipe 45b is fixed inside the main body 41 by a fixing part (not shown). Of the ends of the first pipe 45b in the axial direction X, the end facing the inner surface of the bottom 44 in the axial direction X is also referred to as a first end 45c, and the end opposite the first end 45c is also referred to as a second end 45d.

[0035] The first end 45c may be, for example, separated from the bottom 44 in the axial direction X. A portion of the first pipe portion 45b in the axial direction X including the first end 45c may be inserted into the ion exchange filter 43 accommodated in the accommodation space S. In this case, the first end 45c opens into the inside of the ion exchange filter 43. A portion of the first pipe portion 45b in the axial direction X including the second end 45d may be located outside the ion exchange filter 43 accommodated in the accommodation space S. In this case, the first end 45c opens to the outside of the ion exchange filter 43.

[0036] The exchanger body 40 has a first end 40a and a second end 40b. Of the two ends of the exchanger body 40 in the axial direction X, one end is the first end 40a and the other end is the second end 40b. The bottom 44 is located at the second end 40b.

[0037] Of both end faces of the bottom 44 in the axial direction X, the face opposite to the end face that defines the storage space S is also referred to as the bottom face 44a. The bottom face 44a is the end face in the axial direction X at the second end 40b of the exchanger body 40. The bottom face 44a is a flat face. The bottom face 44a may be, for example, a flat face extending in a direction perpendicular to the axial direction X. When viewing the bottom 44 from the axial direction X, the bottom face 44a may be located on a part of the bottom 44 or on the entire bottom 44.

[0038] The lid portion 42 closes the opening 41a. The lid portion 42 has an outer lid portion 46 and an inner lid portion 47. The inner lid portion 47 is, for example, tubular extending in the axial direction X. The inner lid portion 47 is, for example, substantially cylindrical. The storage space S may include at least a part of the internal space of the inner lid portion 47. The outer diameter of the inner lid portion 47 is equal to or smaller than the inner diameter of the opening 41a of the main body portion 41. A first recess 47a is formed on the outer peripheral surface of the inner lid portion 47. The first recess 47a extends in the circumferential direction of the inner lid portion 47 along the outer peripheral surface of the inner lid portion 47. The first recess 47a is an annular groove that opens to the outside of the inner lid portion 47.

[0039] A seal member 48 is attached to the first recess 47a. The seal member 48 is, for example, an O-ring. The seal member 48 is annular. With the seal member 48 attached to the first recess 47a, the inner lid portion 47 is inserted into the inside of the main body portion 41 from the opening 41a. Inside the main body portion 41, the outer peripheral end of the seal member 48 contacts the inner peripheral surface of the tube portion 45. In this way, the seal member 48 seals the inside of the main body portion 41, and the lid portion 42 closes the opening 41a.

[0040] The outer lid portion 46 is, for example, substantially cylindrical and extends in the axial direction X. The storage space S may include at least a part of the internal space of the outer lid portion 46. The outer lid portion 46 is aligned with the inner lid portion 47 in the axial direction X. Of both ends of the outer lid portion 46 in the axial direction X, the end connected to the inner lid portion 47 is called the connecting end portion 46a. The connecting end portion 46a is, for example, cylindrical and extends in the axial direction X. When the lid portion 42 is viewed from the axial direction X, the outer diameter of the connecting end portion 46a is larger than the outer diameter of the inner lid portion 47, and the entire inner lid portion 47 is located inside the outer peripheral surface of the connecting end portion 46a. Therefore, an annular plane 46b extending in the radial direction of the connecting end portion 46a is formed between the inner lid portion 47 and the connecting end portion 46a in the axial direction X. When the inner lid part 47 is inserted into the inside of the main body part 41 from the opening 41a, for example, the open end of the main body part 41 comes into contact with the flat surface 46b, so that the connecting end part 46a is maintained in a state where it is not inserted into the inside of the main body part 41 from the opening 41a. As a result, the outer lid part 46 in this embodiment is located outside the main body part 41.

[0041] A second recess 46c is formed on the outer peripheral surface of the outer cover portion 46. The second recess 46c extends in the circumferential direction of the outer cover portion 46 along the outer peripheral surface of the outer cover portion 46. The second recess 46c is an annular groove that opens to the outside of the outer cover portion 46.

[0042] The lid portion 42 has a flat lid surface 42a. The lid surface 42a is located at the end opposite to the internal lid portion 47 among both ends of the external lid portion 46 in the axial direction X. The lid surface 42a is an end surface in the axial direction X at the first end 40a of the exchanger body 40. Therefore, the lid portion 42 is located at the first end 40a. The lid surface 42a may be, for example, a plane extending in a direction perpendicular to the axial direction X. When the lid portion 42 is viewed from the axial direction X, the lid surface 42a may be located at a part or the entire end of the external lid portion 46 in the axial direction X. In addition, when the lid portion 42 is viewed from the axial direction X, the lid surface 42a in this embodiment is an annular shape located at a portion excluding the center and the outer periphery of the external lid portion 46.

[0043] A third recess 42c is formed in a portion of the cover surface 42a. The third recess 42c is recessed further than a portion of the cover surface 42a where the third recess 42c is not formed. The third recess 42c extends between the center of the cover surface 42a and an end of the cover surface 42a in the perpendicular direction Y. The third recess 42c opens to the outside of the outer cover portion 46 in the perpendicular direction Y.

[0044] The lid portion 42 has a second tube portion 42b. The second tube portion 42b extends in the axial direction X inside the lid portion 42. The second tube portion 42b penetrates the inside of the outer lid portion 46 and the inner lid portion 47. Of both ends of the second tube portion 42b in the axial direction X, one end is closed and is provided in a third recess 42c in the center of the lid surface 42a, and the other end is open inside the lid portion 42. This open end of the second tube portion 42b is also referred to as an open end 42d. The open end 42d faces the second end 45d of the first tube portion 45b in the axial direction X. When the lid portion 42 closes the opening 41a, the open end 42d and the second end 45d are in contact with each other's end faces in the axial direction X, for example. As a result, the first tube portion 45b and the second tube portion 42b are connected.

[0045] The outer lid portion 46 has a supply pipe portion 55 and a discharge pipe portion 56. In this embodiment, the supply pipe portion 55 and the discharge pipe portion 56 extend in the same direction. In this embodiment, the supply pipe portion 55 and the discharge pipe portion 56 extend in an orthogonal direction Y that is perpendicular to the axis L of the cylindrical portion 45. In this embodiment, the supply pipe portion 55 and the discharge pipe portion 56 are aligned with each other in the axial direction X.

[0046] The supply pipe 55 in this embodiment extends from the outer peripheral surface of the outer lid portion 46 to the outside of the lid portion 42. In detail, for example, the supply pipe 55 extends from the outer peripheral surface of the connecting end portion 46a. The supply pipe 55 penetrates the wall portion of the outer lid portion 46. Therefore, the supply pipe 55 extends between the inside and the outside of the lid portion 42. One end of the supply pipe 55 opens outside the lid portion 42, and the other end of the supply pipe 55 opens inside the lid portion 42.

[0047] In this embodiment, a portion of the discharge pipe portion 56 is inserted into the third recess 42c, and the other portion extends from inside the third recess 42c to the outside of the lid portion 42. One end of the discharge pipe portion 56 opens outside the lid portion 42, and the other end of the discharge pipe portion 56 is connected to the second pipe portion 42b. As a result, the discharge pipe portion 56, the second pipe portion 42b, and the first pipe portion 45b are connected to each other.

[0048] The supply pipe section 55 is connected to the bypass upstream flow path 53a. The discharge pipe section 56 is connected to the bypass downstream flow path 53b. The ion exchanger 34 is connected to the bypass flow path 53 via the supply pipe section 55 and the discharge pipe section 56.

[0049] <Flow of cooling water in an ion exchanger> The cooling water flowing through the bypass flow passage 53 flows from the bypass upstream flow passage 53a into the inside of the lid portion 42 through the supply pipe portion 55. The cooling water flows from the inside of the lid portion 42 into the inside of the main body portion 41. Inside the main body portion 41, the cooling water passes through the ion exchange filter 43. As a result, the ion exchange filter 43 removes electric charges from the cooling water passing through the ion exchange filter 43. After passing through the ion exchange filter 43, the cooling water flows into the first pipe portion 45b inside the main body portion 41. The cooling water flows through the first pipe portion 45b, the second pipe portion 42b, and the discharge pipe portion 56 in this order, and then flows from the discharge pipe portion 56 into the bypass downstream flow passage 53b. In this way, the ion exchanger 34 removes electric charges from the cooling water flowing through the bypass flow passage 53.

[0050] <First extension member> The first extension member 61 is made of, for example, metal. The first extension member 61 is, for example, flat. The first extension member 61 extends, for example, perpendicular to the axial direction X. A first through hole 61h is formed in the first extension member 61. The first through hole 61h is a hole that penetrates the first extension member 61 in the axial direction X. The first through hole 61h in this embodiment has a thread groove on its inner circumferential surface.

[0051] As shown in FIG. 5, when the ion exchanger 34 is viewed from the axial direction X, the portion where the first through hole 61h is formed in the first extension member 61 does not overlap with the exchanger body 40. In this embodiment, three first through holes 61h are formed in the first extension member 61. When the exchanger body 40 is viewed from the axial direction X, a portion surrounded by a virtual triangle formed by connecting the three first through holes 61h is called a virtual portion V. When the exchanger body 40 is viewed from the axial direction X, the center C of the lid portion 42 is located inside the virtual portion V. When the exchanger body 40 is viewed from the axial direction X, the center C of the lid portion 42 coincides with the center point of the virtual portion V. When the exchanger body 40 is viewed from the axial direction X, the center C of the lid portion 42 may coincide with the center of the main body portion 41. In this case, the center of the main body portion 41 coincides with the axis L of the cylindrical portion 45.

[0052] A first extension hole 61a is formed in the first extension member 61. The first extension hole 61a is a hole penetrating the first extension member 61 in the axial direction X. When the first extension member 61 is viewed from the axial direction X, the first extension hole 61a extends between the center of the first extension member 61 and an end of the first extension member 61 in the perpendicular direction Y. The first extension hole 61a opens to the outside of the first extension member 61 in the perpendicular direction Y.

[0053] Of both ends of the second pipe portion 42b in the axial direction X, the end provided in the third recess 42c in the center of the cover surface 42a is located in the first extension hole 61a in the center of the first extension member 61. In the present embodiment, a portion of the discharge pipe portion 56 is inserted into the first extension hole 61a, and the other portion extends from inside the first extension hole 61a to the outside of the first extension member 61.

[0054] A second extension hole 61b is formed in the first extension member 61. The second extension hole 61b is a hole that penetrates the first extension member 61 in the axial direction X. In this embodiment, two second extension holes 61b are formed in the first extension member 61. When the first extension member 61 is viewed from the axial direction X, of the two second extension holes 61b, one second extension hole 61b is located on one side of the first extension hole 61a in the perpendicular direction Y, and the other second extension hole 61b is located on the other side of the first extension hole 61a in the perpendicular direction Y.

[0055] When the ion exchanger 34 is viewed from the axial direction X, product information on the exchanger body 40 written on the cover surface 42a of the cover portion 42 may be visible from each of the two second extended holes 61b. This product information may be written on the cover portion 42 so as to protrude from the cover surface 42a, for example. In this case, since the second extended holes 61b penetrate the first extended member 61, it is possible to prevent the product information written on the cover surface 42a from interfering with the first extended member 61.

[0056] As shown in FIG. 4, in this embodiment, the first extension member 61 has a planar first extension surface 61c. The first extension surface 61c is located on the side of both ends of the first extension member 61 in the axial direction X that faces the cover portion 42. In other words, the first extension surface 61c faces the first end 40a of the exchanger body 40 in the axial direction X. The first extension surface 61c may be, for example, a plane extending in a direction perpendicular to the axial direction X. When viewing the first extension member 61 from the axial direction X, the first extension surface 61c may be located on a part or the entire end of the first extension member 61 in the axial direction X. Note that when viewing the first extension member 61 from the axial direction X, the first extension surface 61c in this embodiment is located on a part of the end of the first extension member 61 in the axial direction X excluding the part where the first through hole 61h, the first extension hole 61a, and the second extension hole 61b are formed.

[0057] The first extension surface 61c and the cover surface 42a are in contact with each other. As a result, the first extension member 61 is provided on the cover portion 42. The first extension member 61 is provided along the cover portion 42 in the axial direction X. In other words, the first extension member 61 is provided along the first end 40a of the exchanger body 40 in the axial direction X.

[0058] <Second extension member> The second extension member 62 is made of metal, for example. The second extension member 62 is, for example, flat. The second extension member 62 extends, for example, perpendicular to the axial direction X. The second extension member 62 has an extension main body portion 66 and an extension protrusion portion 67. Each of the extension main body portion 66 and the extension protrusion portion 67 extends, for example, perpendicular to the axial direction X. The extension protrusion portion 67 protrudes from the extension main body portion 66 in an orthogonal direction Y perpendicular to the axis L of the tube portion 45. The second extension member 62 in this embodiment has four extension protrusion portions 67. The four extension protrusion portions 67 protrude from portions of the end portion of the extension main body portion 66 in the orthogonal direction Y that are separated from each other in the circumferential direction of the tube portion 45.

[0059] A second through hole 62h is formed in the second extending member 62. The second through hole 62h is a hole that penetrates the second extending member 62 in the axial direction X. In this embodiment, the second through hole 62h is formed in the extending protrusion 67. In this embodiment, three second through holes 62h are formed in the second extending member 62. The second through holes 62h are formed in three of the four extending protrusions 67 in the second extending member 62. Among the four extending protrusions 67, the extending protrusion 67 in which the second through hole 62h is formed is also referred to as the first extending protrusion 67a, and the extending protrusion 67 in which the second through hole 62h is not formed is also referred to as the second extending protrusion 67b.

[0060] As shown in Fig. 6, when the ion exchanger 34 is viewed from the axial direction X, at least a portion of the first extended protrusion 67a does not overlap with the exchanger body 40. When the ion exchanger 34 is viewed from the axial direction X, the second through hole 62h formed in the first extended protrusion 67a does not overlap with the exchanger body 40. As shown in Fig. 3, when the ion exchanger 34 is viewed from the axial direction X, the first through hole 61h formed in the first extending member 61 and the second through hole 62h formed in the second extending member 62 overlap with each other.

[0061] 4, in this embodiment, the second extension member 62 has a planar second extension surface 62c and a planar third extension surface 62d. The second extension surface 62c is located on the side of both ends of the second extension member 62 in the axial direction X that faces the bottom portion 44. In other words, the second extension surface 62c faces the second end 40b of the exchanger body 40 in the axial direction X. The third extension surface 62d is located on the end opposite to the second extension surface 62c, of both ends of the second extension member 62 in the axial direction X.

[0062] The second extension surface 62c and the third extension surface 62d may be, for example, planes extending in a direction perpendicular to the axial direction X. When viewing the second extension member 62 from the axial direction X, the second extension surface 62c may be located on a part or the entire end of the second extension member 62 in the axial direction X. When viewing the second extension member 62 from the axial direction X, the second extension surface 62c in this embodiment is located on a part of the end of the second extension member 62 in the axial direction X excluding the part where the second through hole 62h is formed. When viewing the second extension member 62 from the axial direction X, the third extension surface 62d may be located on a part or the entire end of the second extension member 62 in the axial direction X. When viewing the second extension member 62 from the axial direction X, the third extension surface 62d in this embodiment is located on a part of the end of the second extension member 62 in the axial direction X excluding the part where the second through hole 62h is formed.

[0063] The second extension surface 62c and the bottom surface 44a are in contact with each other. As a result, the bottom portion 44 is provided on the second extension member 62. The extension main body portion 66 is provided along the bottom portion 44. Therefore, the second extension member 62 is provided along the bottom portion 44 in the axial direction X. In other words, the second extension member 62 is provided along the second end 40b of the exchanger body 40 in the axial direction X. The second extension member 62, together with the first extension member 61, sandwiches the exchanger body 40 in the axial direction X.

[0064] <bracket> As shown in Fig. 2, the bracket 80 is made of, for example, metal. The bracket 80 in this embodiment has a bracket main body 81 and a bracket extension portion 82. The bracket main body 81 extends along the outer peripheral surface of the tubular portion 45 of the exchanger main body 40. The bracket main body 81 may be in contact with the outer peripheral surface of the tubular portion 45. The bracket main body 81 extends in the axial direction X between both ends of the tubular portion 45 in the axial direction X. The bracket main body 81 is, for example, in the shape of a flat plate.

[0065] For example, the bracket body 81 of the bracket 80 is attached to the attachment location of the ion exchanger 34. As a result, the ion exchanger 34 is attached to the attachment location via the bracket 80.

[0066] The bracket extension portion 82 extends in the axial direction X from the end of the bracket main body 81 on the lid portion 42 side. The bracket extension portion 82 faces the second recess 46c formed on the outer peripheral surface of the lid portion 42 in the perpendicular direction Y. Of the two ends of the bracket extension portion 82 in the axial direction X, the end opposite the end connected to the bracket main body 81 is curved away from the exchanger main body 40. The bracket 80 in this embodiment has two bracket extension portions 82. The two bracket extension portions 82 are separated from each other in the circumferential direction of the tube portion 45.

[0067] The bracket 80 is fixed to the exchanger body 40. In this embodiment, the two bracket extensions 82 are fixed to the cover 42 by the fixing member 90, thereby fixing the bracket 80 to the exchanger body 40. The fixing member 90 is, for example, a metal cable tie. The fixing member 90 is attached to the outer cover 46 such that the bracket extensions 82 are interposed between the outer cover 46 and the fixing member 90. The fixing member 90 has a portion other than the portion in contact with the bracket extensions 82 located inside the second recess 46c in the cover 42. This makes it possible to suppress the fixing member 90 from being displaced in the axial direction X.

[0068] The bracket 80 has a bracket extending portion 83 and a bracket protruding portion 84. The bracket extending portion 83 is, for example, flat. The bracket extending portion 83 extends, for example, perpendicular to the axial direction X. The bracket extending portion 83 is connected to one of both ends of the bracket main body 81 in the axial direction X, which is opposite to the end where the bracket extending portion 82 is provided.

[0069] The bracket extension portion 83 has a flat bracket surface 83a. The bracket surface 83a extends, for example, perpendicular to the axial direction X. The bracket surface 83a is located at one of both ends of the bracket extension portion 83 in the axial direction X that faces the second extension member 62.

[0070] The bracket extension portion 83 is positioned such that the bracket surface 83a is along the third extension surface 62d of the second extension member 62. As a result, the bracket extension portion 83 is provided along the extension main body portion 66. The bracket surface 83a may be in contact with the third extension surface 62d.

[0071] 7, the bracket protrusion 84 protrudes from the bracket extending portion 83. The bracket extending portion 83 extends in the axial direction X so as to be adjacent to the extending protrusion 67 in the orthogonal direction Y. The bracket 80 in this embodiment has two bracket protrusions 84. One of the two bracket protrusions 84 is also referred to as a first bracket protrusion 84a, and the other is also referred to as a second bracket protrusion 84b.

[0072] The first bracket protrusion 84a protrudes from a portion of the bracket extension 83 located between the first extension protrusion 67a and the second extension protrusion 67b when the ion exchanger 34 is viewed from the axial direction X. The first bracket protrusion 84a is adjacent to the first extension protrusion 67a and the second extension protrusion 67b in the perpendicular direction Y. Of both ends of the first bracket protrusion 84a in the axial direction X, the end opposite the bracket extension 83 is connected to the bracket main body 81.

[0073] 8, the second bracket protrusion 84b protrudes from a portion overlapping with the first extending protrusion 67a when the ion exchanger 34 is viewed from the axial direction X. The second bracket protrusion 84b is adjacent to the first extending protrusion 67a in the perpendicular direction Y. Of both ends of the second bracket protrusion 84b in the axial direction X, the end opposite the bracket extending portion 83 is not connected to the bracket main body 81.

[0074] <Regulation material> As shown in FIG. 3, the regulating members 70 are made of, for example, metal. The ion exchanger 34 in this embodiment includes three regulating members 70. The regulating members 70 are through bolts. In detail, the regulating members 70 have a head 71 and a shaft portion 72. The shaft portion 72 is, for example, cylindrical and extends in the axial direction X. A thread groove is formed on the outer circumferential surface of the shaft portion 72. The thread groove is formed on at least a portion of the shaft portion 72, including the end of the shaft portion 72 opposite to the head portion 71.

[0075] The regulating member 70 is inserted into the first through hole 61h and the second through hole 62h to integrally fasten the first extension member 61 and the second extension member 62. When the ion exchanger 34 is viewed from the axial direction X, one regulating member 70 is inserted into one first through hole 61h and one second through hole 62h that overlap with each other in the axial direction X. In this manner, each of the three regulating members 70 is inserted into the first through hole 61h and the second through hole 62h.

[0076] The head 71 is in contact with the third extending surface 62d of the second extending member 62. A portion of the shaft portion 72 closer to the head 71 is inserted into the second through hole 62h. A part of the shaft portion 72 where a thread groove is formed is inserted into the first through hole 61h. The thread groove of the first through hole 61h and the thread groove of the shaft portion 72 mesh with each other, so that the restricting member 70 is fixed to the first extending member 61. The end of the shaft portion 72 opposite to the head 71 extends in the axial direction X from the first through hole 61h.

[0077] The restricting member 70 restricts the first extension member 61 and the second extension member 62 so that the first extension member 61 and the second extension member 62 do not separate from each other in the axial direction X by contact of the head 71 with the second extension member 62 and fixing of the shaft portion 72 to the first extension member 61. Note that the dimension in the axial direction X between the portion of the shaft portion 72 inserted into the first through hole 61h and the portion of the shaft portion 72 inserted into the second through hole 62h is the same as the dimension of the exchanger body 40 in the axial direction X. Therefore, the dimension in the axial direction X of the portion of the shaft portion 72 extending from the first through hole 61h in the axial direction X becomes smaller as the dimension in the axial direction X of the exchanger body 40 becomes larger.

[0078] <Ion exchange filter maintenance work> When the ion exchanger 34 is used for a long period of time, the ion exchange performance of the ion exchanger 34 may deteriorate. For this reason, it is preferable to periodically perform maintenance of the ion exchange filter 43, such as replacing the ion exchanger 34 provided in the cooling system 10 and replacing the ion exchange filter 43 provided in the ion exchanger 34. Hereinafter, an example of a procedure for replacing the ion exchange filter 43 provided in the ion exchanger 34 will be described as the maintenance of the ion exchange filter 43.

[0079] When replacing the ion exchange filter 43, first, the restricting member 70 is pulled out from the first through hole 61h. This allows the first extension member 61 and the second extension member 62 to be displaced in the axial direction X away from each other.

[0080] When the first extension member 61 and the second extension member 62 are displaced away from each other in the axial direction X, it becomes possible to remove the lid portion 42 from the opening 41a of the main body portion 41 in the exchanger body 40. When the lid portion 42 is removed from the opening 41a of the main body portion 41, the opening 41a is opened to the outside of the ion exchanger 34. Therefore, it becomes possible for an operator to access the ion exchange filter 43 inside the main body portion 41 through the opening 41a.

[0081] After removing the ion exchange filter 43 from inside the main body 41, the worker inserts a new ion exchange filter 43 into the main body 41 through the opening 41a. Then, the worker attaches the lid 42 to the main body 41 so as to close the opening 41a of the main body 41. The worker inserts the restricting member 70 into the first through hole 61h and the second through hole 62h. This restricts the first extension member 61 and the second extension member 62 from moving apart from each other in the axial direction X. In this way, the maintenance of the ion exchange filter 43 is completed.

[0082] [Operation of the embodiment] Next, the operation of the above embodiment will be described. As shown in FIG. 1 and FIG. 4, the cooling water is circulated under closed conditions such as the radiator 31, the circulation flow path 50, and the fuel cell 30 by driving the pump 32. Furthermore, a part of the cooling water flowing through the supply flow path 51 flows into the bypass flow path 53, passes through the ion exchanger 34, and then flows into the discharge flow path 52. By flowing the cooling water in this way, the internal pressure of the circulation flow path 50 and the bypass flow path 53 increases, and the internal pressure of the exchanger body 40 in the ion exchanger 34 increases. When the internal pressure of the exchanger body 40 increases, a load from the inside to the outside of the exchanger body 40 acts on the exchanger body 40. For example, a load in the axial direction X acts on the exchanger body 40. In the exchanger body 40 in this embodiment, the cover portion 42 closes the opening 41a of the main body portion 41. The opening 41a is partitioned by an end portion 45a, which is the end portion of the tube portion 45 opposite to the bottom portion 44 in the axial direction X. Therefore, if a large load in the axial direction X acts on the exchanger body 40, the exchanger body 40 may be deformed in the axial direction X, and therefore, measures against the load in the axial direction X acting on the exchanger body 40 are required. Note that the deformation in the axial direction X of the exchanger body 40 in this embodiment includes the coming off of the cover portion 42 from the opening portion 41a, deformation of the cover portion 42 in the axial direction X, etc.

[0083] According to this embodiment, the second extension member 62 and the first extension member 61 sandwich the exchanger body 40 in the axial direction X. The restricting member 70 restricts the first extension member 61 and the second extension member 62 so that the first extension member 61 and the second extension member 62 do not separate from each other in the axial direction X. As a result, even when an internal pressure rises in the exchanger body 40, the first extension member 61 and the second extension member 62 are unlikely to separate from each other in the axial direction X. Therefore, the first extension member 61 and the second extension member 62 suppress the displacement of the main body portion 41 and the cover portion 42 in the axial direction X so as to separate from each other. This suppresses the detachment of the cover portion 42 from the opening 41a and the deformation of the cover portion 42 in the axial direction X.

[0084] [Effects of the embodiment] According to the embodiment, the following actions and effects can be obtained. (1) The second extension member 62, together with the first extension member 61, sandwiches the exchanger body 40 in the axial direction X. The regulating member 70 regulates the first extension member 61 and the second extension member 62 so that the first extension member 61 and the second extension member 62 do not separate from each other in the axial direction X. Therefore, even when the internal pressure of the exchanger body 40 increases due to the driving of the pump 32, the first extension member 61 and the second extension member 62 are unlikely to separate from each other in the axial direction X. Even when the internal pressure of the exchanger body 40 increases, the first extension member 61 and the second extension member 62 can suppress deformation of the exchanger body 40 in the axial direction X. Therefore, deformation of the exchanger body 40 caused by the increase in the internal pressure of the exchanger body 40 can be suppressed.

[0085] (2) The first extension member 61 is formed with a first through hole 61h. The second extension member 62 is formed with a second through hole 62h. The regulating member 70 is a through bolt that is inserted into the first through hole 61h and the second through hole 62h to integrally fasten the first extension member 61 and the second extension member 62. Therefore, by changing the position of the regulating member 70 inserted into either the first through hole 61h or the second through hole 62h, it is possible to accommodate exchanger bodies 40 having different dimensions in the axial direction X. Therefore, since it is not necessary to prepare a plurality of regulating members 70 having different dimensions according to the dimensions of the exchanger body 40 in the axial direction X, the cost related to the regulating member 70 can be reduced.

[0086] (3) The exchanger body 40 has a main body 41 having an internal storage space S in which an ion exchange filter 43 is stored and an opening 41a communicating with the storage space S, and a lid 42 closing the opening 41a. The main body 41 has a bottom 44 and a tubular portion 45 extending from the bottom 44 in the axial direction X. The opening 41a is defined by an end 45a, which is an end of the tubular portion 45 opposite to the bottom 44 in the axial direction X. The first extension member 61 is provided along the lid 42 in the axial direction X. The second extension member 62 is provided along the bottom 44 in the axial direction X. Therefore, when a load in the axial direction X acting on the exchanger body 40 is large, there is a risk that the lid 42 will come off from the opening 41a or the lid 42 will be deformed in the axial direction X, but these can be suppressed. Moreover, maintenance of the ion exchange filter 43 can be performed through the opening 41a by removing the cover 42 from the main body 41. Therefore, the cost associated with maintaining the ion exchange filter 43 can be reduced compared to the case where the exchanger main body 40 is replaced for the maintenance of the ion exchange filter 43.

[0087] (4) The second extension member 62 has an extension main body portion 66 provided along the bottom portion 44, and an extension protrusion portion 67 protruding from the extension main body portion 66 in an orthogonal direction Y perpendicular to the axis L of the tube portion 45. The ion exchanger 34 includes a bracket 80 fixed to the exchanger main body 40. The bracket 80 has a bracket extension portion 83 provided along the extension main body portion 66, and a bracket protrusion portion 84 protruding from the bracket extension portion 83 and extending in the axial direction X so as to be adjacent to the extension protrusion portion 67 in the orthogonal direction Y. Therefore, the extension protrusion portion 67 and the bracket protrusion portion 84 abut against each other, thereby suppressing displacement of the exchanger main body 40 in the orthogonal direction Y.

[0088] [Example of change] The embodiment can be modified as follows: The embodiment and the following modified examples can be combined with each other to the extent that there is no technical contradiction.

[0089] The cooling system 10 may further include an adjustment valve that adjusts the amount of cooling water flowing through the circulation flow path 50 and the amount of cooling water flowing through the bypass flow path 53. This adjustment valve may be provided, for example, at a connection between the bypass upstream flow path 53a and the supply flow path 51. The adjustment valve may be controlled by, for example, the control unit 64 to adjust the ratio of the cooling water flowing through the bypass upstream flow path 53a and the supply flow path 51.

[0090] The ion exchanger 34 may be provided in the circulation flow path 50. In this case, the cooling system 10 may omit the bypass flow path 53. The ion exchanger 34 may be provided in the supply flow path 51 or the discharge flow path 52.

[0091] The bracket 80 may have one bracket protrusion 84, or may have three or more bracket protrusions 84. The bracket 80 may omit the bracket protrusion 84.

[0092] The bracket extension 83 may be omitted from the bracket 80. The bracket 80 may be omitted from the ion exchanger 34. The first pipe portion 45b and the second pipe portion 42b may be a pipe portion of a single member. In this case, the pipe portion is provided in the lid portion 42, for example. For example, when the lid portion 42 is attached to the main body portion 41, the pipe portion is inserted into the inside of the main body portion 41.

[0093] At least one of the supply pipe section 55 and the discharge pipe section 56 may be provided in the main body section 41. In other words, as long as they are provided in the exchanger main body 40, the installation positions of the supply pipe section 55 and the discharge pipe section 56 can be changed. Furthermore, the extending directions of the supply pipe section 55 and the discharge pipe section 56 may be different from each other. The supply pipe section 55 and the discharge pipe section 56 may be provided at positions that are not aligned with each other in the axial direction X.

[0094] In the above modified example, if neither the supply pipe portion 55 nor the discharge pipe portion 56 is positioned to be exposed above the cover surface 42a, the formation of the first extension hole 61a in the first extension member 61 may be omitted.

[0095] The tubular portion 45 may have a tubular shape other than a cylindrical shape. For example, the tubular portion 45 may have a rectangular tubular shape or a triangular tubular shape. The shape of the exchanger body 40 in the embodiment may be changed. For example, the exchanger body 40 may be one in which the storage space S is defined inside by three or more members, instead of two members such as the main body portion 41 and the lid portion 42. For example, the exchanger body 40 may be one in which the storage space S is defined inside by one member, without distinction between the main body portion 41 and the lid portion 42. Note that maintenance of the ion exchange filter 43 in the ion exchanger 34 employing this exchanger body 40 can be performed by replacing the exchanger body 40 with a new exchanger body 40.

[0096] The shapes of the first extension member 61 and the second extension member 62 may be changed. For example, at least one of the first extension member 61 and the second extension member 62 may have a shape other than a flat plate shape. For example, if the product information of the exchanger body 40 is visible from a portion other than the second extension hole 61b, the second extension hole 61b to the first extension member 61 may be omitted. In short, the shapes of the first extension member 61 and the second extension member 62 can be changed as long as the exchanger body 40 can be sandwiched between the first extension member 61 and the second extension member 62 in the axial direction X.

[0097] The number of the first through holes 61h formed in the first extension member 61 may be four or more. The number of the second through holes 62h formed in the second extension member 62 may be four or more. The number of the first through holes 61h formed in the first extension member 61 and the number of the second through holes 62h formed in the second extension member 62 may be the same as long as they are the same. The number of the regulating members 70 provided in the ion exchanger 34 may be adjusted according to the number of the first through holes 61h and the second through holes 62h. Even in such a modified example, it is preferable that the center C of the cover portion 42 is located inside a portion surrounded by an imaginary polygon formed by connecting all the first through holes 61h formed in the first extension member 61 when viewing the exchanger body 40 from the axial direction X. It is preferable that the center C of the cover portion 42 coincides with the center point of the imaginary polygon when viewing the exchanger body 40 from the axial direction X.

[0098] The number of first through holes 61h formed in the first elongated member 61 may be two or less. The number of second through holes 62h formed in the second elongated member 62 may be two or less. The number of first through holes 61h formed in the first elongated member 61 and the number of second through holes 62h formed in the second elongated member 62 may be the same. The number of regulating members 70 provided in the ion exchanger 34 may be adjusted depending on the numbers of the first through holes 61h and the second through holes 62h.

[0099] The restricting member 70 may further include a nut attached to the end of the shaft portion 72 opposite to the head 71. In this case, the nut is attached to a portion of the shaft portion 72 extending from the first through hole 61h in the axial direction X, and is provided on the first extension member 61. This can further prevent the restricting member 70 from coming off the first through hole 61h. Note that in this case, the formation of a thread groove on the inner circumferential surface of the first through hole 61h may be omitted.

[0100] The ion exchanger 34 may include a member other than the through bolt as the regulating member 70. For example, the regulating member 70 may be a metal cable tie. By bridging the cable tie as the regulating member 70 between the first extension member 61 and the second extension member 62, the first extension member 61 and the second extension member 62 are regulated so that the first extension member 61 and the second extension member 62 do not separate from each other in the axial direction X. The regulating member 70 may also be a rod member that is fixed to the first extension member 61 and the second extension member 62 in a state where the rod member is inserted through the first through hole 61h and the second through hole 62h. The method of fixing the rod member as the regulating member 70 to the first extension member 61 and the second extension member 62 may be, for example, welding. The rod member as the regulating member 70 also regulates the first extension member 61 and the second extension member 62 so that the first extension member 61 and the second extension member 62 do not separate from each other in the axial direction X. The restricting member 70 may be composed of a shaft having thread grooves formed on both ends and a nut. In this case, the first extension member 61 and the second extension member 62 are fastened together by passing the shaft through the first through hole 61h and the second through hole 62h and engaging nuts with both ends of the shaft.

[0101] In the above modified example, when the ion exchanger 34 employs a restricting member 70 such as a cable tie that does not pass through the first through hole 61h and the second through hole 62h, the first through hole 61h may be omitted from the first extension member 61 and the second through hole 62h may be omitted from the second extension member 62. In this case, the shape of the first extension member 61 may be changed, for example, by omitting a portion of the first extension member 61 where the first through hole 61h is formed. The extending protrusion 67 may be omitted from the second extension member 62. [Explanation of symbols]

[0102] L...axis, S...accommodation space, X...axial direction, Y...orthogonal direction, 10...cooling system, 30...fuel cell, 32...pump, 34...ion exchanger, 40...exchanger body, 40a...first end, ..., 40b...second end, 41...main body, 41a...opening, 42...lid, 43...ion exchange filter, 44...bottom, 45...tubular portion, 45a...end (as end of cylindrical portion), 50...circulation flow path, 61...first extension member, 61h...first through hole, 62...second extension member, 62h...second through hole, 66...extending main body, 67...extending protrusion, 70...regulating member, 80...bracket, 83...bracket extension, 84...bracket protrusion.

Claims

1. An ion exchanger that is installed in a cooling system including a fuel cell, a circulation flow path that circulates cooling water between the fuel cell, and a pump that adjusts a flow rate of the cooling water circulated between the fuel cell and the circulation flow path, and that removes electric charges from the cooling water, an exchanger body having an ion exchange filter housed therein and extending in an axial direction; a first extension member provided along a first end of the exchanger body in the axial direction; a second extension member provided along a second end of the exchanger body in the axial direction and sandwiching the exchanger body together with the first extension member in the axial direction; a restricting member that restricts the first extension member and the second extension member so that the first extension member and the second extension member do not move away from each other in the axial direction.

2. The first extension member has a first through hole formed therein, The second extension member has a second through hole formed therein, The ion exchanger according to claim 1 , wherein the restricting member is a through-bolt that is inserted into the first through-hole and the second through-hole to integrally fasten the first extension member and the second extension member.

3. The exchanger body includes a main body portion having an internal storage space for storing the ion exchange filter and an opening portion communicating with the storage space, and a lid portion closing the opening portion, The main body portion has a bottom portion and a cylindrical portion extending in the axial direction from the bottom portion, the opening is defined by an end of the cylindrical portion opposite the bottom portion in the axial direction, The lid portion is located at the first end, the bottom is located at the second end; The first extension member is provided along the cover portion in the axial direction, The ion exchanger according to claim 1 , wherein the second extension member is provided along the bottom portion in the axial direction.

4. The exchanger body includes a bottom portion and a cylindrical portion extending in the axial direction from the bottom portion, the bottom is located at the second end; The second extension member has an extension main body portion provided along the bottom portion and an extension protruding portion protruding from the extension main body portion in a direction perpendicular to the axis of the cylindrical portion, The ion exchanger includes a bracket fixed to the exchanger body, 2. The ion exchanger of claim 1, wherein the bracket has a bracket extension portion provided along the extended main body portion, and a bracket protrusion portion protruding from the bracket extension portion and extending in the axial direction so as to be adjacent to the extended protrusion portion in the orthogonal direction.

5. A fuel cell; a circulation flow path for circulating cooling water between the fuel cell and the circulation flow path; a pump for adjusting a flow rate of the cooling water circulated between the fuel cell and the circulation flow path; A cooling system for a fuel cell, comprising: the ion exchanger according to any one of claims 1 to 4.

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