Cooling device of fuel cell vehicle

The cooling device optimizes airflow and reduces ventilation resistance by arranging a condenser, radiator, and fan in a specific configuration, enhancing cooling performance and flexibility in fuel cell vehicles.

JP2025139521APending Publication Date: 2025-09-26TOYOTA JIDOSHA KK
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Patent Information

Application Number
JP2024038509
Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
Filing Date
2024-03-12
Publication Date
2025-09-26

AI Technical Summary

Technical Problem

Fuel cell vehicles require improved cooling performance due to higher energy conversion efficiency and lower refrigerant temperature limits compared to internal combustion engine vehicles, necessitating enhanced heat dissipation and cooling system design.

Method used

A cooling device arrangement for fuel cell vehicles with a condenser, radiator, and fan positioned sequentially from front to rear, where the condenser has a smaller area than the radiator, the radiator encompasses the condenser's center, and the fan's center is offset relative to the radiator's, with the fan overlapping the fuel cell stack, optimizing airflow and reducing ventilation resistance.

Benefits of technology

This arrangement enhances cooling performance by reducing ventilation resistance and temperature increase of cooling air, allowing for efficient heat dissipation and improved component mounting flexibility within the vehicle compartment.

✦ Generated by Eureka AI based on patent content.

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Abstract

To provide a cooling device of a fuel cell vehicle with improved cooling performance.SOLUTION: A cooling device 100 of a fuel cell vehicle 10 loaded with a fuel cell stack 30 keeps (a) a condenser 42, a radiator 44, and a fan 50 arranged in a front storage chamber 12 in order from the front of the fuel cell vehicle 10 to the back, has (b) a smaller area of the condenser 42, as compared with the radiator 44, as viewed from the front of the fuel cell vehicle 10, and keeps (c) the radiator 44 arranged so as to include the center position CPc of the condenser 42, as viewed from the front of the fuel cell vehicle 10, and the center position CPc of the condenser 42 arranged by shifting above the fuel cell vehicle 10 with respect to the center position CPr of the radiator 44.SELECTED DRAWING: Figure 1
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Description

[Technical Field]

[0001] This invention relates to a cooling device for a fuel cell vehicle equipped with a fuel cell stack. [Background technology]

[0002] There is known a cooling device in which a condenser, a radiator, and a fan are arranged in this order from the front to the rear of the vehicle in the front compartment where the engine is mounted, such as the one described in Patent Document 1. In the cooling device described in Patent Document 1, the centers of the condenser, the radiator, and the fan are all at the same height when viewed from the front to the rear of the vehicle. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2017-223141 Summary of the Invention [Problem to be solved by the invention]

[0004] Unlike internal combustion engine vehicles (ICEs) powered by engines (internal combustion engines) that burn fossil fuels such as gasoline, fuel cell vehicles (FCVs) are known that are equipped with a fuel cell stack that generates electricity using hydrogen as fuel and are driven by an electric motor using the electricity generated by the fuel cell stack. A "fuel cell stack" is a structure formed by stacking and connecting fuel cell cells that generate electricity using hydrogen as fuel. Compared to ICEs, FCVs have a higher energy conversion efficiency for converting the potential energy of fuel into power, while also having lower exhaust losses. Therefore, much of the lost heat must be dissipated into the refrigerant of the cooling system. Furthermore, compared to the upper limit temperature of the refrigerant used to cool the engine in ICEs, the upper limit temperature of the refrigerant used to cool the fuel cell stack must be lower to ensure the heat resistance of the ion exchange membranes that make up the fuel cells. For these reasons, improved cooling performance is required for FCVs compared to ICEs.

[0005] The present invention has been made in light of the above circumstances, and an object of the present invention is to provide a cooling device for a fuel cell vehicle with improved cooling performance. [Means for solving the problem]

[0006] The gist of the first invention is a cooling device for a fuel cell vehicle equipped with a fuel cell stack, in which (a) a condenser, a radiator, and a fan are arranged in that order from the front to the rear of the fuel cell vehicle within a front storage compartment, (b) when viewed from the front to the rear of the fuel cell vehicle, the condenser has a smaller area than the radiator, and (c) when viewed from the front to the rear of the fuel cell vehicle, the radiator is arranged to include the center position of the condenser, and the center position of the condenser is shifted above the fuel cell vehicle with respect to the center position of the radiator.

[0007] The gist of the second invention is that in the first invention, when viewed from the front to the rear of the fuel cell vehicle, the center position of the condenser is shifted from the center position of the radiator in the horizontal direction of the fuel cell vehicle to the side where the flow rate of outside air taken into the front compartment is smaller.

[0008] The gist of the third invention is that in the first or second invention, when viewed from the front to the rear of the fuel cell vehicle, the radiator is positioned so as to include the center position of the fan, and the center position of the fan is shifted in the opposite direction to the center position of the condenser relative to the center position of the radiator.

[0009] The gist of a fourth aspect of the present invention is that in the third aspect of the present invention, the fan is arranged at a position overlapping the fuel cell stack when viewed from above and below the fuel cell vehicle.

[0010] The gist of the fifth invention is that in any one of the first to fourth inventions, the condenser is arranged within the range of the radiator when viewed from the front to the rear of the fuel cell vehicle. [Effects of the Invention]

[0011] According to the cooling device for a fuel cell vehicle of the first aspect of the invention, (a) a condenser, a radiator, and a fan are arranged in this order from front to rear in a front compartment of the fuel cell vehicle, (b) the condenser has a smaller area than the radiator when viewed from front to rear of the fuel cell vehicle, and (c) when viewed from front to rear of the fuel cell vehicle, the radiator is arranged to include the center position of the condenser, and the center position of the condenser is offset upward from the center position of the radiator. By arranging the condenser to be offset upward, ventilation resistance of the cooling air reaching the radiator located at the rear is reduced and an increase in temperature of the cooling air cooling the radiator is suppressed. This improves the cooling performance of the fuel cell vehicle.

[0012] According to the cooling device for a fuel cell vehicle of the second aspect of the invention, in the first aspect, when viewed from the front to the rear of the fuel cell vehicle, the center position of the condenser is shifted from the center position of the radiator in the horizontal direction of the fuel cell vehicle toward the side where the flow rate of outside air taken into the front compartment is smaller. By shifting the condenser in the horizontal direction toward the side where the flow rate of outside air taken into the front compartment is smaller, the ventilation resistance of the cooling air reaching the radiator located at the rear is reduced, thereby further improving the cooling performance of the fuel cell vehicle.

[0013] According to the cooling device for a fuel cell vehicle of the third aspect of the invention, in the first or second aspect of the invention, when viewed from the front to the rear of the fuel cell vehicle, the radiator is positioned to include the center position of the fan, and the center position of the fan is shifted in the opposite direction from the center position of the condenser relative to the center position of the radiator. In this way, when viewed from the front to the rear of the fuel cell vehicle, the fan is shifted in the opposite direction from the condenser. This makes it easier for cooling air to be drawn into the portion of the radiator located at the rear that does not overlap with the condenser located at the front, when viewed from the front to the rear of the fuel cell vehicle, further improving the cooling performance of the vehicle.

[0014] According to the cooling device for a fuel cell vehicle of the fourth aspect of the present invention, in the third aspect, the fan is positioned so as to overlap the fuel cell stack when viewed from above. By positioning the fan in the opposite direction from the condenser, it becomes easy to position the fan and the fuel cell stack located behind it so as to overlap when viewed from above. This arrangement reduces the overall size of the fuel cell stack and the condenser, radiator, and fan that make up its cooling device in the longitudinal direction of the fuel cell vehicle. This improves the flexibility of mounting various components in the front compartment.

[0015] According to the cooling device for a fuel cell vehicle of the fifth aspect, in any one of the first to fourth aspects, the condenser is disposed within the range of the radiator when viewed from the front to the rear of the fuel cell vehicle. By disposing the condenser within the range of the radiator when viewed from the front to the rear of the fuel cell vehicle, the condenser and radiator that constitute the cooling device for the fuel cell stack are prevented from becoming too large as a whole when viewed from the front to the rear of the fuel cell vehicle. This prevents a decrease in the flexibility of mounting various parts in the front compartment. [Brief explanation of the drawings]

[0016] [Figure 1]1 is a diagram illustrating the arrangement of a condenser, a radiator, and a fan in a cooling device according to an embodiment of the present invention in the longitudinal direction of a fuel cell vehicle. [Figure 2] 2 is a view of the condenser, radiator, and fan of the cooling device shown in FIG. 1, viewed from the front to the rear of the fuel cell vehicle. DETAILED DESCRIPTION OF THE INVENTION

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Note that in the embodiments, the drawings are appropriately simplified or modified, and the dimensional ratios and shapes of the various parts are not necessarily drawn accurately. [Example]

[0018] FIG. 1 is a diagram illustrating the arrangement of a condenser 42, a radiator 44, and a fan 50 of a cooling device 100 according to an embodiment of the present invention in the longitudinal direction of a fuel cell vehicle 10 (hereinafter simply referred to as "vehicle 10"). FIG. 1 is a diagram viewed in the vehicle width direction, with the left side of FIG. 1 being the front side of the vehicle 10 and the right side of FIG. 1 being the rear side of the vehicle 10. The upper side of FIG. 1 is the upper side of the vehicle 10 and the lower side of FIG. 1 is the lower side of the vehicle 10. FIG. 2 is a diagram of the condenser 42, the radiator 44, and the fan 50 of the cooling device 100 shown in FIG. 1 viewed from the front to the rear of the vehicle 10. The front grille 20 shown in FIG. 1 is not shown in FIG. 2. FIG. 2 is a diagram viewed from the front to the rear of the vehicle 10, with the left side of FIG. 2 being the right side of the vehicle 10 and the right side of FIG. 2 being the left side of the vehicle 10. 2 is the upper side of the vehicle 10, and the lower side of the vehicle 10 is the lower side of the vehicle 10. In this specification, "front-rear view" refers to viewing the vehicle 10 from the front to the rear, and "up-down view" refers to viewing the vehicle 10 from the top to the bottom.

[0019] The vehicle 10 is provided with a fuel cell stack 30 and a cooling device 100 for cooling heat generated in the fuel cell stack 30, etc., in a front compartment 12. The front compartment 12 is a space provided in the vehicle 10 forward of the driver's seat.

[0020] The cooling device 100 includes a condenser 42, a radiator 44, and a fan 50. The condenser 42 is, for example, a heat exchanger that uses outside air to cool the refrigerant of an air conditioner that conditions the air inside the vehicle cabin, and is a well-known configuration. The radiator 44 is, for example, a low-temperature radiator 44L and a high-temperature radiator 44H. The high-temperature radiator 44H is, for example, a heat exchanger that uses outside air to cool the refrigerant that cools the fuel cell stack 30, and is a well-known configuration. The low-temperature radiator 44L is, for example, a heat exchanger that uses outside air to cool the refrigerant that cools a drive device other than the fuel cell stack 30, and is a well-known configuration. For example, the condenser 42 and the radiator 44 are assembled into an assembly 40 before being installed in the vehicle 10. The assembly 40 is a collection of parts that includes the condenser 42 and the radiator 44, which are multiple components assembled together. The condenser 42 and the radiator 44 that are assembled into the assembly 40 are then installed integrally in the vehicle 10.

[0021] Here, the temperature of the refrigerant cooled by the condenser 42 is referred to as "refrigerant temperature THc [°C]," the temperature of the refrigerant cooled by the low-temperature radiator 44L is referred to as "refrigerant temperature THrl [°C]," and the temperature of the refrigerant cooled by the high-temperature radiator 44H is referred to as "refrigerant temperature THrh [°C]." Of the "refrigerant temperature THc," "refrigerant temperature THrl," and "refrigerant temperature THrh," "refrigerant temperature THc" is the lowest, followed by "refrigerant temperature THrl," and "refrigerant temperature THrh" is the highest.

[0022] The fan 50 is a device that draws in outside air from the front of the vehicle 10 in the front compartment 12 using a rotating impeller and directs it toward the rear, and is, for example, a well-known electric or mechanical fan.

[0023] Outside air is taken into the front compartment 12 through an upper opening 22 having a plurality of openings 22o and a lower opening 24 having a plurality of openings 24o, both of which are provided in the front grille 20. The flow of outside air taken in through the upper opening 22 is referred to as cooling air Wup, and the flow of outside air taken in through the lower opening 24 is referred to as cooling air Wdown.

[0024] Here, "ram pressure" refers to the wind pressure [Pa] acting on the vehicle body when the vehicle 10 is moving. In the front grille 20 of the vehicle 10, the outside air flowing in from the front while the vehicle is moving is relatively difficult to escape from the lower side except through the lower opening 24, while the outside air flowing in from the front while the vehicle is moving is relatively easy to escape from the upper side except through the upper opening 22. In addition, in the front grille 20 of the vehicle 10, the upper opening 22 tends to have a shape in which the openings 24o are recessed further rearward as they extend upward, in order to reduce air resistance while the vehicle 10 is moving. On the other hand, the lower opening 24 tends to have a shape in which the openings 24o are recessed further rearward as they extend downward, compared to the openings 22o. For these reasons, it is believed that the ram pressure is greater at the lower opening 24 than at the upper opening 22.

[0025] In this embodiment, the opening area of ​​the upper opening 22 is larger than the opening area of ​​the lower opening 24 when viewed in the front-rear direction. 3 / s] is the flow rate of cooling air Wup [m 3 The present inventors have newly discovered that in some cases the ram pressure may be greater than the relative size of the opening areas of the upper opening 22 and the lower opening 24.

[0026] The cooling device 100 has a condenser 42, a radiator 44, and a fan 50 arranged in this order from the front to the rear of the vehicle 10. The fuel cell stack 30 is arranged further rearward of the cooling device 100. Hydrogen as fuel and air are supplied to the fuel cell stack 30 from auxiliary equipment 34 including a pump and injectors. The fuel cell stack 30 and auxiliary equipment 34 are supported by, for example, a support structure 32.

[0027] For example, the condenser 42, the low-temperature radiator 44L, and the high-temperature radiator 44H each have an outer shape that is substantially rectangular parallelepiped, and are provided with a plurality of holes that penetrate in the front-rear direction for ventilation.

[0028] As shown in Fig. 2, the condenser 42 has a smaller area than the radiator 44 when viewed in the front-rear direction. When viewed in the front-rear direction, the position of the center of the condenser 42 is the center position CPc, the position of the center of the radiator 44 is the center position CPr, and the position of the center of the fan 50 is the center position CPf. The positions of the centers of the condenser 42, the radiator 44, and the fan 50 are the geometric centers of their respective shapes when viewed in the front-rear direction. The center position CPc corresponds to the "center position of the condenser" in this invention, the center position CPr corresponds to the "center position of the radiator" in this invention, and the center position CPf corresponds to the "center position of the fan" in this invention.

[0029] In a front-rear view, the radiator 44 is disposed so as to include the center position CPc of the condenser 42. That is, in a front-rear view, the radiator 44 and the condenser 42 are disposed so as to at least partially overlap each other. The center position CPc of the condenser 42 is disposed offset upward from the center position CPr of the radiator 44. "Displaced" means disposed offset. Due to this arrangement, the ratio of the flow rate of the cooling air Wup sequentially passing through the condenser 42, the low-temperature radiator 44L, and the high-temperature radiator 44H to the total flow rate is greater than the cooling air Wdown. That is, compared to the cooling air Wup, the ratio of the flow rate of the cooling air Wdown passing through the low-temperature radiator 44L and the high-temperature radiator 44H without passing through the condenser 42 to the total flow rate is greater than the cooling air Wup.

[0030] The cooling air Wup is mainly ventilated in the area where the condenser 42 is located, which cools the refrigerant at the lowest refrigerant temperature THc among the refrigerant temperatures THc, THrl, and THrh. The cooling air Wdown is mainly ventilated in the area where the radiator 44 is located, which cools the refrigerant at the higher refrigerant temperatures THrl and THrh than the refrigerant temperature THc among the refrigerant temperatures THc, THrl, and THrh.

[0031] The temperature of the refrigerant being cooled is higher in the radiator 44 than in the condenser 42. In this way, the radiator 44, which has a higher temperature of the refrigerant being cooled, is mainly cooled by the cooling air Wdown, which does not pass through the condenser 42, on the side of the cooling air Wdown where the flow rate is higher than that of the cooling air Wup, i.e., at the bottom of the vehicle 10. The cooling air Wdown cools the radiator 44 in a state where the ventilation resistance to the radiator 44 is lower than that of the cooling air Wup. The "ventilation resistance" is the flow resistance of the cooling air Wup or the cooling air Wdown to the condenser 42 and the radiator 44 provided in the cooling device 100.

[0032] In general, in conventional internal combustion engine vehicles, the condenser 42 has approximately the same area as the radiator 44 when viewed in the front-rear direction, and the center position CPc of the condenser 42 and the center position CPr of the radiator 44 are positioned so that they are not offset from each other. This is because there is little demand for cooling performance. Furthermore, even if the condenser 42 has a smaller area than the radiator 44 when viewed in the front-rear direction, the center position CPc of the condenser 42 is likely to be offset downward from the center position CPr of the radiator 44. This is because consideration is given to lowering the center of gravity of the entire vehicle and ease of manufacturing the assembly 40. "Ease of manufacturing the assembly 40" means that the condenser 42 and the radiator 44 can be easily manufactured by aligning their lower ends when they are assembled together as the assembly 40.

[0033] Returning to the description of this embodiment, for example, if the flow rate of the cooling air Wup taken into the front accommodation compartment 12 from the upper opening 22 of the vehicle 10 is greater on the left side than on the right side, the center position CPc of the condenser 42 is disposed so as to be shifted to the right of the vehicle 10 with respect to the center position CPr of the radiator 44 as viewed in the front-rear direction. In other words, the center position CPc of the condenser 42 is disposed so as to be shifted with respect to the center position CPr of the radiator 44 toward the side where the flow rate of the cooling air Wup is smaller.

[0034] When viewed in the front-rear direction, the radiator 44 is disposed so as to include the center position CPf of the fan 50. That is, when viewed in the front-rear direction, the radiator 44 and the fan 50 are disposed so as to at least partially overlap each other. The center position CPf of the fan 50 is disposed so as to be shifted in the opposite direction from the center position CPc of the condenser 42 with respect to the center position CPr of the radiator 44. That is, the center position CPc of the condenser 42 is disposed so as to be shifted upward and to the right with respect to the center position CPr of the radiator 44. In contrast, the center position CPf of the fan 50 is disposed so as to be shifted downward and to the left with respect to the center position CPr of the radiator 44.

[0035] When viewed from the top and bottom of the vehicle 10, the fan 50 is positioned so as to overlap the fuel cell stack 30. In this embodiment, as shown in Fig. 1, the fan 50 is positioned so as to overlap the fuel cell stack 30 by a length L [m] in the front-to-rear direction. In other words, the fuel cell stack 30 and the condenser 42, radiator 44, and fan 50 that constitute the cooling device 100 are all reduced in size by the length L in the front-to-rear direction.

[0036] When viewed in the front-rear direction, the condenser 42 is disposed within the range of the radiator 44. In other words, when viewed in the front-rear direction, the outer shape of the condenser 42 does not extend beyond the outer shape of the radiator 44.

[0037] According to the cooling device 100 of this embodiment, (a) the condenser 42, the radiator 44, and the fan 50 are arranged in this order from the front to the rear of the vehicle 10 within the front accommodation compartment 12, (b) when viewed from the front to the rear of the vehicle 10, the condenser 42 has a smaller area than the radiator 44, and (c) when viewed in the front-to-rear direction, the radiator 44 is arranged to include a center position CPc of the condenser 42, and the center position CPc of the condenser 42 is arranged offset upward of the vehicle 10 with respect to the center position CPr of the radiator 44. By arranging the condenser 42 offset upward, the ventilation resistance of the cooling air Wdown reaching the radiator 44 arranged at the rear is reduced, and an increase in the temperature of the cooling air Wdown that cools the radiator 44 is suppressed. This improves the cooling performance of the vehicle 10.

[0038] According to the cooling device 100 of this embodiment, when viewed in the front-rear direction, the center position CPc of the condenser 42 is disposed offset relative to the center position CPr of the radiator 44 in the horizontal direction of the vehicle 10 toward the side where the flow rate of outside air taken into the front accommodation compartment 12 is smaller. By displacing the condenser 42 in the horizontal direction toward the side where the flow rate of outside air taken into the front accommodation compartment 12 is smaller, the ventilation resistance of the cooling air Wup reaching the radiator 44 disposed at the rear is reduced. This further improves the cooling performance of the vehicle 10.

[0039] According to the cooling device 100 of this embodiment, in a front-to-rear view, the radiator 44 is disposed so as to include the center position CPf of the fan 50, and the center position CPf of the fan 50 is disposed offset in the opposite direction from the center position CPc of the condenser 42 with respect to the center position CPr of the radiator 44. In this way, in a front-to-rear view, the fan 50 is disposed offset in the opposite direction from the condenser 42. This makes it easier for the cooling airflow Wup, Wdown to be drawn into the portion of the radiator 44 disposed at the rear that does not overlap with the condenser 42 disposed at the front, thereby further improving the cooling performance of the vehicle 10.

[0040] According to the cooling device 100 of this embodiment, the fan 50 is disposed in a position overlapping the fuel cell stack 30 in a vertical view. By displacing the fan 50 in the opposite direction from the condenser 42, it becomes easy to dispose the fan 50 and the fuel cell stack 30 disposed behind it in a position overlapping in a vertical view. This disposition reduces the overall size of the fuel cell stack 30 and the condenser 42, radiator 44, and fan 50 that constitute the cooling device 100 in the front-rear direction. This improves the flexibility in mounting various components within the front accommodation compartment 12.

[0041] According to the cooling device 100 of this embodiment, the condenser 42 is disposed within the range of the radiator 44 when viewed in the front-rear direction. By disposing the condenser 42 within the range of the radiator 44 when viewed in the front-rear direction, the condenser 42 and the radiator 44 that constitute the cooling device 100 for the fuel cell stack 30 are prevented from becoming too large as a whole when viewed from the front to the rear of the vehicle 10. This prevents a decrease in the degree of freedom in mounting various parts within the front accommodation compartment 12.

[0042] The above-described embodiments of the present invention are merely examples, and the present invention can be embodied in various forms with various modifications and improvements based on the knowledge of those skilled in the art without departing from the spirit of the present invention.

[0043] In the above-described embodiment, the center position CPc of the condenser 42 is disposed, as viewed in the front-rear direction, so as to be shifted relative to the center position CPr of the radiator 44 in the horizontal direction of the vehicle 10 toward the side where the flow rate of outside air taken into the front accommodation compartment 12 is smaller. However, the present invention is not limited to this configuration. For example, as viewed in the front-rear direction, the center position CPc of the condenser 42 may be disposed so as to overlap the center position CPr of the radiator 44. Even in such a configuration, when the center position CPc of the condenser 42 is disposed so as to be shifted upward of the vehicle 10 relative to the center position CPr of the radiator 44, the cooling performance of the vehicle 10 is improved compared to when this is not the case.

[0044] In the above-described embodiment, the radiator 44 is disposed so as to include the center position CPf of the fan 50, and the center position CPf of the fan 50 is displaced in the opposite direction from the center position CPc of the condenser 42 with respect to the center position CPr of the radiator 44, as viewed in the front-rear direction. However, the present invention is not limited to this configuration. For example, the radiator 44 may be disposed so as not to include the center position CPf of the fan 50, or the center position CPf of the fan 50 may be displaced in a direction other than the opposite direction from the center position CPc of the condenser 42 with respect to the center position CPr of the radiator 44, as viewed in the front-rear direction. Even in such a configuration, when the center position CPc of the condenser 42 is displaced upward of the vehicle 10 with respect to the center position CPr of the radiator 44, the cooling performance of the vehicle 10 is improved compared to when this is not the case.

[0045] In the above-described embodiment, the fan 50 is disposed in a position overlapping with the fuel cell stack 30 when viewed in the vertical direction, but the present invention is not limited to this. For example, the fan 50 may be disposed in a position not overlapping with the fuel cell stack 30 when viewed in the vertical direction. Even in such a configuration, if the center position CPc of the condenser 42 is disposed above the vehicle 10 with respect to the center position CPr of the radiator 44, the cooling performance of the vehicle 10 can be improved compared to when this is not the case.

[0046] In the above-described embodiment, the condenser 42 is disposed within the range of the radiator 44 as viewed in the front-rear direction, but the present invention is not limited to this. For example, the condenser 42 may be disposed outside the range of the radiator 44 as viewed in the front-rear direction. Even in such a configuration, if the center position CPc of the condenser 42 is disposed above the vehicle 10 with respect to the center position CPr of the radiator 44, the cooling performance of the vehicle 10 can be improved compared to when this is not the case.

[0047] In the above-described embodiment, the opening area of ​​the upper opening 22 is larger than the opening area of ​​the lower opening 24. However, the present invention is not limited to this. For example, the present invention can also be applied to an embodiment in which the opening area of ​​the upper opening 22 is the same as or smaller than the opening area of ​​the lower opening 24. Even in such an embodiment, the ram pressure is larger in the lower opening 24 than in the upper opening 22. Therefore, when viewed in the front-rear direction, the center position CPc of the condenser 42 is shifted upward in the vehicle 10 with respect to the center position CPr of the radiator 44. This allows the radiator 44 to be efficiently cooled by the cooling air Wdown, which has a high flow density. This improves the cooling performance of the vehicle 10. [Explanation of symbols]

[0048] 10: fuel cell vehicle, 12: front housing compartment, 30: fuel cell stack, 42: condenser, 44: radiator, 50: fan, 100: cooling device, CPc: center position (center position of condenser), Cpr: center position (center position of radiator), CPf: center position (center position of fan)

Claims

1. A cooling device for a fuel cell vehicle equipped with a fuel cell stack, a condenser, a radiator, and a fan are arranged in this order from the front to the rear of the fuel cell vehicle in a front accommodation chamber; When viewed from the front to the rear of the fuel cell vehicle, the condenser has an area smaller than that of the radiator, When viewed from the front to the rear of the fuel cell vehicle, the radiator is disposed so as to include the center position of the condenser, and the center position of the condenser is disposed so as to be shifted upward from the center position of the radiator. A cooling device for a fuel cell vehicle.

2. When viewed from the front to the rear of the fuel cell vehicle, the center position of the condenser is shifted with respect to the center position of the radiator in the horizontal direction of the fuel cell vehicle toward the side where the flow rate of outside air taken into the front accommodation compartment is smaller.

2. The cooling device for a fuel cell vehicle according to claim 1.

3. When viewed from the front to the rear of the fuel cell vehicle, the radiator is disposed so as to include a central position of the fan, and the central position of the fan is disposed so as to be shifted in the opposite direction to the central position of the condenser with respect to the central position of the radiator.

3. The cooling device for a fuel cell vehicle according to claim 1 or 2.

4. When viewed from above and below the fuel cell vehicle, the fan is disposed in a position that overlaps with the fuel cell stack.

4. The cooling device for a fuel cell vehicle according to claim 3.

5. When viewed from the front to the rear of the fuel cell vehicle, the condenser is disposed within the range of the radiator.

3. The cooling device for a fuel cell vehicle according to claim 1 or 2.

Citation Information

Patent Citations

  • Heat exchange device

    JP2017223141A