JP5721607B2 - Cooling system - Google Patents

Description

  The present invention relates to a cooling device mounted on a fuel cell vehicle.

  In recent years, as a countermeasure against future oil depletion and global warming, development of a fuel cell vehicle that runs on electric power supplied from the fuel cell has been advanced. Such a fuel cell vehicle requires a cooling device such as a radiator in order to cool the fuel cell that generates power in a high temperature state.

  In addition, the fuel cell vehicle includes a drive motor that receives electric power supplied from the fuel cell and generates a driving force. When the fuel cell vehicle travels, heat is also generated from the drive motor. Therefore, a cooling device for cooling the drive motor is further required.

  However, since the operating temperature of the fuel cell (around 90 degrees in the case of a polymer electrolyte fuel cell) is higher than the operating temperature of the drive motor (around 60 degrees), the fuel cell and the drive motor are controlled independently of each other. Need to do. That is, instead of cooling them by a single cooling device, it is necessary to provide a cooling device for cooling the fuel cell and a cooling device for cooling the drive motor independently of each other.

  In the following Patent Document 1, a first radiator for cooling the fuel cell and a second radiator for cooling the drive motor are arranged side by side along the front-rear direction of the vehicle, and further arranged behind the first radiator. A cooling device is described which is configured to cool them with a common air cooling fan.

JP 2006-327325 A

  When a radiator is used as the cooling device, the cooling performance of the radiator is proportional to the area of the ventilation section. Therefore, in order to obtain high cooling performance, it is necessary to make the area of the ventilation section as wide as possible. However, since the space in which the radiator can be mounted in the fuel cell vehicle is limited, it is required to enlarge the area of the ventilation part as much as possible within the limitation of such a space.

  The cooling device described in Patent Document 1 is provided with a mechanism for fixing to the vehicle body for each of the plurality of radiators in order to fix the plurality of radiators to the vehicle body of the fuel cell vehicle. Specifically, a support pin provided on each radiator is mounted on a support hole of a support member installed on the vehicle body. As a result, since the support member and the like are separately installed in a limited space in the vehicle, it is necessary to reduce the area of the ventilation portion of the radiator.

  Further, in a radiator for a vehicle, there is an air guide plate called a fan shroud between the air cooling fan and the radiator adjacent thereto so that the wind generated by the air cooling fan is effectively used for cooling the radiator. It is common to arrange. Therefore, by extending the fan shroud and surrounding the entire outer periphery of the plurality of radiators arranged side by side in the longitudinal direction of the vehicle, the plurality of radiators are fixed in the vehicle via the fan shroud. It is also possible to use

  However, in that case, a gap for disposing the fan shroud is required between the radiator and the vehicle body (body). Therefore, it is necessary to reduce the outer shape of the radiator, and eventually the ventilation part of the radiator. The area becomes narrow.

  The present invention has been made in view of such problems, and the object thereof is to arrange a plurality of radiators in a limited space inside the fuel cell vehicle in a state in which the area of each ventilation portion is widely secured. Then, it is providing the cooling device which can be fixed with respect to a fuel cell vehicle.

  In order to solve the above problems, a cooling device according to the present invention is a cooling device mounted on a fuel cell vehicle that travels by generating a driving force of a drive motor by electric power supplied by a fuel cell, and includes a first ventilation portion A first radiator that cools the fuel cell by passing wind through the first ventilation section, and a second ventilation section, and the drive motor by passing wind through the second ventilation section. A second radiator for cooling, and a rod-like bracket is fixed to the first radiator, and the second radiator is fixed to the bracket in a state where the second ventilation portion is overlapped with the first ventilation portion. And one end of the bracket is fixed to a vehicle body of the fuel cell vehicle.

  According to the present invention, the first radiator that cools the fuel cell and the second radiator that cools the drive motor are fixed to the rod-shaped bracket in a state where the ventilation portions are overlapped. Then, by fixing one end of the bracket to the fuel cell vehicle, both the first radiator and the second radiator are fixed to the fuel cell vehicle. For this reason, it is not necessary to provide a mechanism for fixing to the vehicle body for each of the plurality of radiators, and the mechanism for fixing the cooling device to the fuel cell vehicle can be simplified. As a result, the cooling device can be fixed to the fuel cell vehicle in a limited space in the vehicle with a large area of the ventilation portion of the first radiator and the second radiator.

  In the cooling device according to the present invention, it is also preferable that the bracket is disposed at a position on the inner side of the end portion of the first radiator in the left-right direction of the fuel cell vehicle.

  In this preferred embodiment, a rod-shaped bracket is disposed at a position inside the end portion of the first radiator in the left-right direction of the fuel cell vehicle. Therefore, it is not necessary to secure a space for arranging the rod-shaped bracket outside the end of the first radiator in the left-right direction of the fuel cell vehicle in the limited space in the vehicle. For this reason, the end portion of the first radiator can be expanded in the left-right direction of the fuel cell vehicle, and a wide area of the ventilation portion of the first radiator, which requires higher cooling performance than the second radiator, can be secured.

  Moreover, in the cooling device according to the present invention, the first radiator has a first tank for supplying a refrigerant to the first ventilation portion, and the bracket is fixed to the first tank. preferable.

  In this preferred embodiment, the bracket and the first radiator are fixed not in the first ventilation portion but in the first tank. For this reason, it is not necessary to provide a mechanism for fixing the bracket to the first ventilation portion, and the entire first ventilation portion can be effectively used for cooling. On the other hand, even if a mechanism for fixing the bracket is provided in the first tank, the cooling performance of the first radiator does not deteriorate. That is, in this preferable aspect, the bracket can be fixed to the first radiator without deteriorating the cooling performance of the first radiator.

  In the cooling device according to the present invention, the second radiator has a second tank for supplying a refrigerant to the second ventilation portion, and the bracket is fixed to the second tank. preferable.

  In this preferred embodiment, the bracket and the second radiator are fixed not in the second ventilation portion but in the second tank. For this reason, it is not necessary to provide a mechanism for fixing the bracket to the second ventilation portion, and the entire second ventilation portion can be effectively used for cooling. On the other hand, even if a mechanism for fixing the bracket is provided in the second tank, the cooling performance of the second radiator does not deteriorate. That is, in this preferable aspect, the bracket can be fixed to the first radiator and the second radiator without lowering the cooling performance of the first radiator and the second radiator.

  In the cooling device according to the present invention, it is also preferable that the bracket is disposed so that the axial direction thereof substantially coincides with the vertical direction of the fuel cell vehicle.

  In this preferred embodiment, the rod-shaped brackets are arranged so that the axial direction of the rod-shaped bracket substantially coincides with the vertical direction of the fuel cell vehicle. For this reason, one end of the bracket and the vehicle body of the fuel cell vehicle are fixed at the upper part or the lower part of the cooling device. Therefore, it is not necessary to provide a mechanism for fixing the left and right sides of the cooling device. Widely secured.

  In the cooling device according to the present invention, it is also preferable that the bracket is provided in the vicinity of both end portions of the first radiator in the left-right direction of the fuel cell vehicle.

  In this preferred embodiment, rod-shaped brackets arranged so that the axial direction thereof substantially coincides with the vertical direction of the fuel cell vehicle are provided in the vicinity of both ends of the first radiator in the horizontal direction of the fuel cell vehicle. For this reason, it is suppressed that the flow of the wind which passes the 1st ventilation part of a 1st radiator hits a bracket and is disturb | confused. As a result, a decrease in cooling performance due to the bracket can be suppressed.

  The cooling device according to the present invention further includes a third radiator that has a third ventilation portion, and that cools the air-conditioning refrigerant of the fuel cell vehicle by allowing the air to pass through the third ventilation portion. It is also preferable that the radiator is fixed to the bracket in a state where the third ventilation portion is overlapped with the first ventilation portion and the second ventilation portion.

  In this preferred embodiment, the third radiator that cools the air-conditioning refrigerant of the fuel cell vehicle is also disposed in the fuel cell vehicle while being fixed to the bracket. For this reason, it is not necessary to separately provide a mechanism for fixing the third radiator to the vehicle body, and the mechanism for fixing the cooling device to the fuel cell vehicle can be further simplified. As a result, in the limited space in the vehicle, the cooling device can be fixed to the fuel cell vehicle in a state where the areas of the ventilation portions of the first radiator, the second radiator, and the third radiator are all secured.

  In the cooling device according to the present invention, it is also preferable that a hook hole is formed at one end of the bracket.

  The cooling device having a structure in which the first radiator, the second radiator, and the third radiator are fixed to the bracket has a problem in that it is difficult to fix the cooling device to the vehicle body because the weight increases. In this preferred embodiment, a hook hole is formed at one end of the bracket. For this reason, for example, by hooking the hook hole on the hook provided on the vehicle body of the fuel cell vehicle, one end of the bracket can be fixed to the fuel cell vehicle. As a result, it becomes easy to fix the heavy cooling device to the vehicle body.

  According to the present invention, in a limited space inside the fuel cell vehicle, a plurality of radiators can be fixed with respect to the fuel cell vehicle after being arranged in a state in which the area of each ventilation portion is widely secured. Possible cooling devices can be provided.

It is the figure which showed typically the structure of the fuel cell vehicle carrying the cooling device which is one Embodiment of this invention in a side view. FIG. 2 is a diagram schematically showing a part of the configuration of the fuel cell vehicle shown in FIG. 1 in a top view. It is the figure which showed typically a part of structure of the FC radiator which comprises the cooling device shown in FIG. It is an exploded view for demonstrating the specific structure about a part of cooling device shown in FIG. It is sectional drawing which showed the specific structure by the top view about a part of cooling device shown in FIG. It is the figure which showed typically the method of fixing the cooling device shown in FIG. 1 inside a fuel cell vehicle. It is the figure which showed the shape of the cooling tube which comprises the FC radiator shown in FIG. It is the figure which showed the shape of the B type cooling tube. It is sectional drawing which shows the state by which the cooling tube shown in FIG. 7 was brazed and fixed to the tank of FC radiator.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In order to facilitate the understanding of the description, the same constituent elements in the drawings will be denoted by the same reference numerals as much as possible, and redundant description will be omitted.

  First, the configuration of a fuel cell vehicle equipped with a cooling device according to an embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 is a diagram schematically showing a configuration of a fuel cell vehicle equipped with a cooling device according to an embodiment of the present invention in a side view. FIG. 2 is a diagram schematically showing a part of the configuration shown in FIG. 1 in a top view. As shown in FIG. 1, the fuel cell vehicle 1 includes a fuel cell device 2, a fuel tank 3, an air conditioner 5, and a cooling device 6.

  The fuel cell device 2 is a device that generates electric power for running the fuel cell vehicle 1, and is disposed below the floor panel of the fuel cell vehicle 1. The fuel cell device 2 is, for example, a polymer electrolyte fuel cell, and has a stack structure in which a large number of single cells are stacked. The single cell has an air electrode on one surface of an electrolyte membrane made of an ion exchange membrane, a fuel electrode on the other surface, and a pair of separators so as to sandwich the air electrode and the fuel electrode from both sides. It has become. In this case, hydrogen gas is supplied to the hydrogen gas passage of one separator, the oxidizing gas is supplied to the oxidizing gas passage of the other separator, and electric power is generated by the chemical reaction of these reaction gases.

  The fuel tank 3 is a tank for storing hydrogen gas supplied to the fuel cell device 2, and is disposed at the rear portion of the fuel cell vehicle 1. The flow rate of the hydrogen gas supplied from the fuel tank 3 to the fuel cell device 2 is controlled by a control device (not shown), a flow rate adjusting valve, and the like according to the required power determined by the accelerator opening and the like.

  The drive motor 4 is a motor that generates a driving force by the electric power supplied from the fuel cell device 2. With this driving force, a plurality of wheels 7 provided in the fuel cell vehicle 1 rotate, and the fuel cell vehicle 1 travels.

  The air conditioner 5 is for adjusting the room temperature of the fuel cell vehicle 1. The air conditioner 5 is of a general system that circulates a refrigerant between a compressor and an evaporator (not shown) and moves the indoor heat to the outside.

  The cooling device 6 is mainly composed of an FC radiator 61, an EV radiator 62, an air conditioning radiator 63, and a sub-radiator 64. The cooling device 6 cools the fuel cell device 2, the drive motor 4 and the like constituting the fuel cell vehicle 1. It is a device for performing.

  The plurality of radiators constituting the cooling device 6 circulate the refrigerant through a pipe (not shown) with each device to be cooled. Each radiator has a ventilation portion, and the air passing through the ventilation portion takes heat from the refrigerant, thereby cooling each device. The supply of wind to the ventilation portion of each radiator is such that the outside air introduced from the ventilation port 8 provided in the bumper face portion of the fuel cell vehicle 1 flows toward the rear of the vehicle by the first fan 65 and the second fan 66. Is done by.

  The FC radiator 61 is a radiator for cooling the fuel cell device 2. When power generation is performed by the fuel cell device 2, reaction heat is generated accordingly, so that the temperature of each single cell constituting the fuel cell device 2 rises. The FC radiator 61 has a first ventilation part 611. By releasing a part of the reaction heat by the air passing through the first ventilation part 611, the temperature of each single cell is maintained within an appropriate range. Yes.

  The EV radiator 62 is a radiator for cooling the drive motor 4. Since the drive motor 4 is an electromagnetic motor that is driven by the electric power supplied from the fuel cell device 2, its temperature rises due to Joule heat during operation. The EV radiator 62 has a second ventilation portion 621, and the Joule heat is released by the air passing through the second ventilation portion 621, thereby preventing the EV radiator 62 from being overheated.

  The air conditioning radiator 63 is a radiator for releasing heat taken from the room by the air conditioner 5 to the outside air. The air-conditioning radiator 63 has a third ventilation part 631, and the air-conditioning function of the room by the air-conditioning device 5 is achieved by cooling the refrigerant circulating between the compressor and the evaporator with the air passing through the third ventilation part 631. Is to maintain.

  The FC radiator 61, the EV radiator 62, and the air conditioning radiator 63 are arranged in this order from the front to the rear of the fuel cell vehicle 1, and the first ventilation section 611, the second ventilation section 621, and the third ventilation section 631 are arranged. They are arranged in a row in a stacked state. A first fan 65 is disposed behind the FC radiator 61 via a fan shroud 67.

  The first fan 65 is a fan for flowing outside air introduced from the ventilation port 8 toward the rear of the vehicle (right direction in FIG. 1). As described above, the FC radiator 61, the EV radiator 62, and the air conditioning radiator 63 are arranged in a row in a state where the ventilation portions are overlapped. For this reason, when the 1st fan 65 operate | moves, a wind is supplied with respect to each ventilation part. In other words, the FC radiator 61, the EV radiator 62, and the air conditioning radiator 63 share one first fan 65. As shown in FIG. 2, the first fan 65 is composed of two fans provided in a pair in the left-right direction of the fuel cell vehicle 1.

  The fan shroud 67 is a wind guide plate disposed between the FC radiator 61 and the first fan 65 so as to surround the outer periphery of both. By disposing the fan shroud 67 in this manner, the amount of air leaking from between the FC radiator 61 and the first fan 65 is reduced, so that the wind generated by the first fan 65 is effectively used for cooling. Has been. The fan shroud 67 is fixed to the surface on the rear side of the FC radiator 61 (the rear side of the fuel cell vehicle 1).

  As shown in FIG. 2, side members 9 a and 9 b that are a pair of beams extending in the front-rear direction of the vehicle body are disposed inside the fuel cell vehicle 1. The FC radiator 61, the EV radiator 62, the air conditioning radiator 63, the first fan 65, and the fan shroud 67 are all disposed in a space formed between the side members 9a and 9b.

  The sub-radiator 64 is a radiator for cooling the fuel cell device 2 similarly to the FC radiator 61, and is arranged for the purpose of supplementing the cooling performance of the FC radiator 61. The sub-radiator 64 is disposed in the inside of the vehicle body of the fuel cell vehicle 1 below the right headlamp 10a so as to be inclined when viewed from above (the ventilation portion faces the front right of the vehicle body). The sub-radiator 64 is fixed to the right side surface near the front end of the side member 9a via a side bracket 11 formed of a metal plate.

  Next, the configuration of the FC radiator 61 will be specifically described with reference to FIG. FIG. 3 is a diagram schematically showing a part of the structure of the FC radiator.

  The FC radiator 61 has a structure in which a first upper tank 612a and a first lower tank 612b are provided on an upper side and a lower side of a first ventilation portion 611 formed in a rectangular shape, respectively. A space is formed inside the first upper tank 612a, and an inflow port 613a that is an opening for allowing the refrigerant to flow into the space is formed on the wall surface of the first upper tank 612a. A space is similarly formed inside the first lower tank 612b, and an outflow port (not shown) that is an opening for allowing the refrigerant to flow out of the space on the wall surface of the first lower tank 612b. Is formed.

  The first ventilation portion 611 is constituted by a plurality of first tubes 616 formed in a hollow cylindrical shape and heat radiating fins 617. The upper end of the first tube 616 is brazed and fixed while penetrating the wall surface of the first upper tank 612a, and the lower end of the first tube 616 is brazed and fixed while penetrating the wall surface of the first lower tank 612b. . For this reason, the internal space of the first upper tank 612a and the internal space of the first lower tank 612b are in communication with each other through the first tube 616.

  Here, the structure of the first tube 616 will be described with reference to FIG. The first tube 616 is formed by welding the end portions of the metal plate after processing the metal plate so that the cross section is an elliptical cylinder. Therefore, the first tube 616 has a hollow portion 100 having an elliptical cross section, and a welded portion 110 is formed on the surface thereof along the axial direction.

  As the structure of the first tube, in addition to the above-described welded tube structure, a so-called B-type tube structure as shown in FIG. 8 may be used. The B-type tube structure is formed by brazing and fixing a metal plate in a bent state as shown in FIG. 8 to form two hollow portions 100a and 101a.

  However, in the case of such a B-type tube structure, since the surface of the metal plate overlaps in the vicinity of the bent portion, the flux applied to remove the oxide film is brazed when brazing. There is a problem that it is likely to remain in the vicinity of 110a, and it takes a long time for pure water cleaning to remove the flux. If the flux remains, the flux component eluted in the refrigerant is ionized and reaches the fuel cell device 2, and the solid polymer film constituting the fuel cell device 2 is deteriorated. For this reason, it is necessary to remove the flux reliably.

  The first tube 616 of this embodiment employs the welded tube structure shown in FIG. 7 instead of the B-type tube structure as described above. In the case of a welded tube structure, it is not necessary to apply a flux unlike brazing, and therefore there is an advantage that it is not necessary to wash for a long time to remove the flux.

  As shown in FIG. 9, the FC radiator 61 has a structure in which a plurality of first tubes 616 having the above-described welded tube structure are brazed and fixed with their upper ends penetrating the wall of the first upper tank 612a. It has become. Similarly, the lower end of the first tube is brazed and fixed while penetrating the wall surface of the first lower tank 612b.

  Both the first tube 616 and the first upper tank 612a and the first tube 616 and the first lower tank 612b need to be fixed by brazing using a flux. When manufacturing the FC radiator 61, the surface of the first upper tank 612a in which the first tube 616 protrudes in the state where the first tube 616 is inserted into the first upper tank 612a (shown by A in FIG. 9). It is desirable to perform brazing after applying a flux from the outside of the first upper tank 612a after masking the entire surface.

  As a result, the amount of flux applied is reduced, and the amount of flux remaining inside the first upper tank 612a through which the refrigerant passes is also very small. Therefore, the time for washing with pure water after brazing to remove the flux is reduced. Can be reduced. The same applies to the fixing of the first tube 616 and the first lower tank 612b. The same applies when the EV radiator 62 and the air conditioning radiator 63 are manufactured in addition to the FC radiator 61.

  The sub-radiator 64 is also composed of a pair of tanks and a plurality of tubes and heat radiating fins arranged therebetween. However, since the sub-radiator 64 is a small-sized radiator, no flux is used. Instead, vacuum brazing with a brazing material to which magnesium is added is performed, thereby eliminating the need for pure water cleaning for removing the flux. Can do.

  Returning to FIG. 3, the description will be continued. A plurality of the first tubes 616 are arranged so as to be parallel to each other, and between the adjacent first tubes 616, the radiation fins 617 are arranged in a corrugated state in contact with the first tubes 616. .

  Next, the function of the FC radiator 61 will be briefly described. The refrigerant heated in the fuel cell device 2 flows into a space formed inside the first upper tank 612a from the inflow port 613a through a pipe (not shown). Thereafter, the refrigerant is distributed to each first tube 616 and passes through the inside of each first tube 616 to reach the first lower tank 612b.

  When the refrigerant passes through the first tube 616, heat from the refrigerant is transmitted to the radiation fins 617 via the wall surface of the first tube 616. Since the radiating fins 617 are arranged in a corrugated shape, an infinite number of openings 618 are formed around the radiating fins 617. Since the wind supplied from the first fan 65 always passes through the opening 618, the heat transmitted to the radiation fins 617 by the wind is released to the outside.

  Therefore, when the refrigerant reaches the first lower tank 612b, the refrigerant is cooled by the heat radiating fins, and the temperature is lowered. The cooled refrigerant flows out from the outflow port formed in the first lower tank 612b, is supplied again to the fuel cell device 2 through a pipe (not shown), and cools the fuel cell device 2.

  As described above, the structure and function of the FC radiator 61 have been described. However, since the structure and function of the EV radiator 62 and the air conditioning radiator 63 are the same as those described above, detailed description thereof will be omitted. That is, the EV radiator 62 also includes a pair of tanks (second right tank 622a and second left tank 622b), and a tube and a heat radiating fin formed therebetween. On the other hand, the pair of tanks (the second right tank 622a and the second left tank 622b) are provided on the left side and the right side instead of the upper side and the lower side of the second ventilation part 621 formed in a rectangular shape. It is different from the FC radiator 61.

  The air conditioning radiator 63 also includes a pair of tanks (a third right tank 632a and a third left tank 632b), and a tube and a radiation fin formed between them. On the other hand, the third right tank 632a and the third left tank 632b, which are a pair of tanks, are provided on the left side and the right side instead of the upper side and the lower side of the third ventilation portion 631 formed in a rectangular shape. It is different from the FC radiator 61.

  Next, a specific configuration of the cooling device 6 will be described with reference to FIGS. 4 and 5. FIG. 4 is an exploded view for explaining a specific configuration and arrangement of a part of the cooling device 6. FIG. 5 is a cross-sectional view showing a specific configuration and arrangement of a part of the cooling device 6 in a top view.

  As already described, the FC radiator 61, the EV radiator 62, and the air conditioning radiator 63 are arranged in a row in a state where the first ventilation portion 611, the second ventilation portion 621, and the third ventilation portion 631 are overlapped. Of these, the FC radiator 61 is required to have the highest cooling performance. Therefore, the outer shape is larger than the outer shapes of the EV radiator 62 and the air conditioning radiator 63 both in the vehicle height direction and in the left-right direction of the vehicle.

  The first upper tank 612a of the FC radiator 61 is provided with mounting seats 614a and 615a at both ends in the left-right direction of the vehicle. The first lower tank 612b is formed with mounting seats 614b and 615b at both ends in the left-right direction of the vehicle. Each of the mounting seats (614a, 615a, 614b, 615b) is formed with a female screw hole into which a screw can be inserted and fixed.

  In the vicinity of both ends of the FC radiator 61 in the left-right direction of the vehicle, rod-like brackets 12a and 12b are fixed, respectively. The bracket 12a has a screw hole 121a formed at its upper end and a screw hole 122a formed at its lower end. These are formed so as to correspond to the positions of the mounting seats 614a and 614b, respectively. Accordingly, the bracket 12a is fixed to the FC radiator 61 by inserting and fixing the screw inserted into the screw hole 121a into the mounting seat portion 614a and inserting and fixing the screw inserted into the screw hole 122a into the mounting seat portion 614b. Yes.

  Similarly, a screw hole 121b is formed at the upper end of the bracket 12b, and a screw hole 122b (not shown) is formed at the lower end. These are formed so as to correspond to the positions of the mounting seats 615a and 615b, respectively. Therefore, the bracket 12b is fixed to the FC radiator 61 by inserting and fixing the screw inserted into the screw hole 121b into the mounting seat 615a and inserting and fixing the screw inserted into the screw hole 122b into the mounting seat 615b. Yes.

  As described above, the pair of brackets 12 a and 12 b are both fixed to the first upper tank 612 a and the first lower tank 612 b constituting the FC radiator 61. Since it is not necessary to provide the first ventilation portion 611 with a mechanism for fixing the brackets 12a and 12b, the entire first ventilation portion 611 is effectively used for cooling.

  Further, as is clear from FIG. 5, the pair of brackets 12 a and 12 b are both disposed at positions inside the end portion of the FC radiator 61 in the left-right direction of the fuel cell vehicle 1. Therefore, it is not necessary to secure a space for arranging the brackets 12a and 12b outside the end of the FC radiator 61 in the left-right direction of the fuel cell vehicle 1 in the limited space in the vehicle. For this reason, the end portion of the FC radiator 61 can be formed larger in the left-right direction of the fuel cell vehicle 1, and the first ventilation portion 611 of the FC radiator 61 that requires higher cooling performance than the EV radiator 62 is required. Wide area is secured.

  Two mounting seats 624a and 625a are formed in the second right tank 622a of the EV radiator 62. The second left tank 622b has two mounting seats 624b and 625b (not shown).

  The bracket 12a has screw holes 125a and 126a formed at two projecting portions 123a and 124a that are formed so as to protrude laterally (to the right of the vehicle). These are formed so as to correspond to the positions of the mounting seats 624a and 625a, respectively. Therefore, the EV radiator 62 is fixed to the bracket 12a by inserting and fixing the screw inserted into the screw hole 125a into the mounting seat 624a and inserting and fixing the screw inserted into the screw hole 126a into the mounting seat 625a. Yes.

  Similarly, the bracket 12b has screw holes 125b and 126b (not shown) formed at two protrusions 123b and 124b (not shown) that protrude from the side (leftward of the vehicle). ing. These are formed so as to correspond to the positions of the mounting seats 624b and 625b, respectively. Therefore, the EV radiator 62 is fixed to the bracket 12b by inserting and fixing the screw inserted into the screw hole 125b into the mounting seat portion 624b and inserting and fixing the screw inserted into the screw hole 126b into the mounting seat portion 625b. Yes.

  As described above, the pair of brackets 12 a and 12 b are both fixed to the second right tank 622 a and the second left tank 622 b that constitute the EV radiator 62. Since there is no need to provide a mechanism for fixing the brackets 12a and 12b in the second ventilation portion 621, the entire second ventilation portion 621 is effectively used for cooling.

  Two mounting seats 634 a and 635 a are formed in the third right tank 632 a of the air conditioning radiator 63. A mounting seat 634b is formed in the third left tank 632b.

  The bracket 12a is formed with a screw hole 128a in a protrusion 127a that protrudes laterally (to the right of the vehicle). The screw hole 128a is formed at substantially the same height as the mounting seat portion 635a. Further, the bracket 12a has a screw hole 130a formed in a protruding portion 129a that protrudes forward (frontward of the vehicle). The screw hole 130a is formed at a position corresponding to the mounting seat 634a.

  The fixing member 13 is fixed to the third right tank 632a. The fixing member 13 is formed with a screw hole 131 and a screw hole 132. By inserting and fixing the screw inserted into the screw hole 131 into the mounting seat portion 635a, the third right tank 632a and the fixing member 13 are connected. It is fixed.

  Furthermore, the bracket 12a and the fixing member 13 are fixed by inserting and fixing the screw inserted into the screw hole 132 into the screw hole 128a of the bracket 12a. In other words, the air conditioning radiator 63 is fixed to the bracket 12a with the fixing member 13 interposed therebetween. Further, the air conditioning radiator 63 is also fixed to the bracket 12a by inserting and fixing the screw inserted into the screw hole 130a into the mounting seat 634a.

  The bracket 12b has a screw hole 128b formed in a protrusion 127b formed to protrude forward (frontward of the vehicle). The screw hole 128b is formed to correspond to the position of the mounting seat portion 634b. Therefore, the air-conditioning radiator 63 is fixed to the bracket 12b by inserting and fixing the screw inserted into the screw hole 128b into the mounting seat portion 634b.

  As described above, the pair of brackets 12 a and 12 b are both fixed to the third right tank 632 a and the third left tank 632 b that constitute the air conditioning radiator 63. Since it is not necessary to provide a mechanism for fixing the brackets 12a and 12b in the third ventilation portion 631, the entire third ventilation portion 631 is effectively used for cooling.

  As described above, the FC radiator 61, the EV radiator 62, and the air conditioning radiator 63 are all fixed to the pair of brackets 12a and 12b. Further, as shown in FIG. 5, a fan shroud 67 and a first fan 65 are fixed to the surface of the FC radiator 61 on the vehicle rear side. Therefore, the FC radiator 61, the EV radiator 62, the air conditioning radiator 63, the fan shroud 67, and the first fan 65 are all integrated to form the cooling unit 6a.

  A hook hole 68a that is a hole penetrating in the front-rear direction of the vehicle is formed in the upper end portion of the bracket 12a. A hook hole 68b, which is a hole penetrating in the front-rear direction of the vehicle, is formed at the same height as the hook hole 68a at the upper end of the bracket 12b.

  Next, a method of fixing the cooling unit 6a inside the fuel cell vehicle 1 will be described with reference to FIG. As shown in FIG. 6, two hooks 14 and 15 are formed inside the fuel cell vehicle 1 in a state of being fixed to the vehicle body. Each of the hooks 14 and 15 is formed as a J-shaped hook that extends vertically downward from the upper wall 20 inside the fuel cell vehicle 1 and then bends toward the front of the fuel cell vehicle 1.

  In addition, the hooks 14 and 15 are spaced apart in the left-right direction of the fuel cell vehicle 1 and are formed at the same height. The distance between the hook 14 and the hook 15 is the same as the distance between the hook holes 68a and 67b.

  When the cooling unit 6a is fixed inside the fuel cell vehicle 1, the cooling unit 6a is suspended by hooking the hooks 68 and 15 with the hook holes 68a and 67b. The cooling unit 6a is heavy by integrating all three radiators and the first fan. However, since the cooling unit 6a is structured to be suspended and fixed, the cooling unit 6a is placed inside the fuel cell vehicle 1. Fixing work is easy. In addition, in order to make the operation | work which fixes the cooling unit 6a still easier, you may provide further the support mechanism which supports a radiator from the circumference | surroundings (for example, downward) of the cooling unit 6a.

  In the present embodiment, the hooks 14 and 15 are fixed to the upper wall 20 of the fuel cell vehicle 1 inside the fuel cell vehicle 1. In addition to such a mode, for example, hooks 14 and 15 may be formed on a beam (cross member) formed to extend in the left-right direction of the fuel cell vehicle 1.

  The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples. In other words, those specific examples that have been appropriately modified by those skilled in the art are also included in the scope of the present invention as long as they have the characteristics of the present invention. For example, the elements included in each of the specific examples described above and their arrangement, materials, conditions, shapes, sizes, and the like are not limited to those illustrated, but can be changed as appropriate. Moreover, each element with which each embodiment mentioned above is provided can be combined as long as technically possible, and the combination of these is also included in the scope of the present invention as long as it includes the features of the present invention.

1: Fuel cell vehicle 2: Fuel cell device 3: Fuel tank 4: Drive motor 5: Air conditioner 6: Cooling device 6a: Cooling unit 61: FC radiator 611: First ventilation section 612a: First upper tank 612b: First Lower tank 613a: Inflow port 614a, 614b, 615a, 615b, 624a, 624b, 625a, 625b, 634a, 634b, 635a: Mounting seat 616: First tube 617: Radiation fin 618: Opening 62: EV radiator 622a: Second right tank 622b: Second left tank 6211: Second ventilation section 624a, 624b, 625a, 625b: Mounting seat 63: Air conditioning radiator 631: Third ventilation section 64: Sub-radiator 632a: Third right section tank 632b: third left tank 65: first fan 66: second fan 67: Fan shroud 68a, 68b: Hook hole 7: Wheel 8: Ventilation hole 9a, 9b: Side member 10a: Right headlamp 10b: Left headlamp 11: Side bracket 12a, 12b: Bracket 13: Fixing member 14, 15: Hook 20: Upper wall 100, 100a: Hollow portion 110: Welded portion 110a: Brazed portion 121a, 121b, 122a, 122b, 125a, 125b, 126a, 126b, 128a, 128b, 130a, 131, 132: Screw hole 123a, 123b, 127a, 127b, 129a: protrusions

Claims (6)

A cooling device mounted on a fuel cell vehicle that travels by generating a driving force of a driving motor by electric power supplied by the fuel cell,
A first radiator that has a first ventilation portion and cools the fuel cell by passing the air through the first ventilation portion;
A second radiator having a second ventilation portion and cooling the drive motor by allowing the second ventilation portion to pass air; and
With
A rod-shaped bracket is fixed to the first radiator,
The outer shape of the second radiator is smaller than the outer shape of the first radiator , and the second radiator is fixed to the bracket in a state where the second ventilation portion is overlapped with the first ventilation portion,
One end of the bracket is fixed to the body of the fuel cell vehicle ,
The brackets are disposed in positions in the left-right direction of the fuel cell vehicle in the vicinity of both end portions of the first ventilation portion, outside the end portion of the second ventilation portion, and inside the end portion of the first radiator. and cooled and wherein the Rukoto. The first radiator has a first tank for supplying coolant to the first ventilation part, the bracket is characterized in that it is fixed to the first tank, according to claim 1 Cooling system. The second radiator has a second tank for supplying coolant to said second ventilation part, the bracket is characterized in that it is fixed to the second tank, according to claim 2 Cooling system. The cooling device according to claim 3 , wherein the bracket is disposed so that an axial direction thereof substantially coincides with a vertical direction of the fuel cell vehicle. A third radiator for cooling the air-conditioning refrigerant of the fuel cell vehicle by passing a wind through the third ventilation portion;
The said 3rd radiator is fixed to the said bracket in the state which accumulated the said 3rd ventilation part on the said 1st ventilation part and the said 2nd ventilation part, The any one of Claim 1 thru | or 4 characterized by the above-mentioned. The cooling device according to one. The cooling device according to any one of claims 1 to 5 , wherein a hook hole is formed at one end of the bracket.

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