JP4459783B2 - Vehicle cooling system - Google Patents

Description

This invention relates to a cooling device for a vehicle using the Ruhi Topaipu to transfer heat as latent heat of the working fluid, in particular a condenser portion for evaporation portion and the working fluid vapor evaporated occurs of the working fluid is condensed and the vapor flow path by by connecting in a ring, to a cooling device for a vehicle using a structure was heat Topaipu to circulating fluidized the separate flow paths and a working fluid vapor and the liquid-phase working fluid.

  This type of heat pipe is called a loop heat pipe (LHP) or a capillary pressure pumping type loop (CPL). In these heat pipes, a liquid-phase working fluid (hereinafter sometimes referred to as a working fluid). Since the working fluid vapor and the working fluid vapor flow in different independent pipes, the working fluid and the working fluid vapor do not form a so-called counterflow. For this reason, there is no restriction on the scattering limit such that the working fluid is blown off or blown off by the working fluid vapor, and the working fluid can flow smoothly, so that the heat transport capability is a so-called straight pipe type. Improved compared to heat pipes.

  An example of a loop heat pipe among the above heat pipes that circulate a working fluid in an annular shape is described in Patent Document 1. In the heat pipe described in Patent Document 1, a groove crest is formed on the inner surface of the evaporator container, and a wick is brought into close contact with the groove crest to form a steam flow path on the outer peripheral side of the wick. A liquid reservoir is formed in the evaporator vessel, and the vapor flow path is communicated with the condenser by a vapor pipe, while the condenser is communicated by the liquid pipe to the inside of the wick of the evaporator container, that is, the liquid reservoir.

The loop heat pipe described in Patent Document 1 and the above-mentioned CPL (hereinafter collectively referred to as a loop heat pipe) have a higher heat transport capability than ordinary straight pipe heat pipes. Therefore, attempts have been made to use heat transport or cooling in a top heat mode, in which heat transport is difficult with a normal straight pipe heat pipe. In the top heat mode, the evaporating part where the working fluid evaporates when heated from the outside is placed at a higher position than the condensing part where the working fluid vapor dissipates heat and condenses, so-called heat from top to bottom. It is a form of heat transport for transporting. In that case, the working fluid generated in the condensing part is refluxed to the evaporation part against gravity. In the heat pipe described in Patent Document 1, the liquid pipe is a simple metal pipe, and the working fluid vapor is continuously supplied from the evaporation section to the condensing section through the upward flow of the working liquid through the liquid pipe. It is caused by being done. Further, in the CPL that uses the wick capillary pressure as a pumping force, the capillary pressure causes an upward flow of the working fluid to the evaporation portion.
Japanese Patent Laid-Open No. 10-246583

  In the loop type heat pipe, as described above, since the working fluid and the working fluid flow in different flow paths, both do not interfere with each other, and accordingly the heat transport capacity does not decrease. When used in the top heat mode described above, it is necessary to raise the hydraulic fluid to the evaporation section against gravity, so the bottom heat mode opposite to this (from the lower evaporation section to the upper position) Compared to the case of transporting heat toward the condensing part, the circulation flow of the working fluid is likely to be hindered.

  For example, in the loop heat pipe described in Patent Document 1 described above, since the liquid pipe is configured by a simple pipe, the pressure for pushing up the working liquid toward the evaporation unit is not generated in a state where heat transport is not generated. As a result, a space is generated inside the liquid tube, resulting in a so-called out-of-liquid state, the working fluid evaporates due to heat input from the outside, and a capillary pressure is generated in the wick accordingly. It is likely that a situation in which it is difficult to immediately reach the wick with the hydraulic fluid is likely to occur. In addition, in order to hold the working fluid in the liquid tube by the capillary pressure generated in the wick of the evaporation section, it is necessary to make the liquid tube thin in order to reduce the weight of the working fluid to be held. The flow rate of the working fluid flowing through the liquid pipe is limited, and the heat transport capability may be limited in this respect.

  On the other hand, the CPL is configured such that a wick is also arranged inside the liquid pipe so that the wick in the evaporation section communicates with the working liquid in the liquid pipe or in the condensation section through the wick in the liquid pipe. Then, since the working fluid is maintained in a state of penetrating each wick, it is rare that the above-described state of so-called liquid shortage occurs. However, the wick provided inside the liquid pipe has a structure in which fine voids such as meshes and porous bodies are intricately interlaced. When there is a large amount of heat input to the evaporation section, the amount of heat transport to the evaporation section is insufficient and heat transport is limited, and in extreme cases, dry-out of the evaporation section and the resulting heat transport stop state Is likely to occur.

The present invention has been made in view of the above-described technical problems, aims to provide a vehicle cooling device using a circulating heat pipe having excellent thermal transport capability be a so-called top heat mode It is what.

In order to achieve the above object, according to the first aspect of the present invention, the evaporation section heated from the outside and the condensation section for radiating heat to the outside form an annular flow path by the steam pipe and the liquid return pipe. The working fluid that is heated to evaporate and dissipates heat and condenses is enclosed in the annular flow path , and the working fluid condensed in the condensing unit evaporates in the liquid return pipe. It has a wick causing capillary pressure for recirculating the parts, the circulating heat pipe and the liquid flow path is provided in the opening area larger flow path cross-sectional area of the gap which the working fluid flows within the wick, the circulation The evaporating part in the type heat pipe includes a heat pipe structure disposed on the lower surface side of the interior material in the vehicle or inside the interior material, and the heat pipe structure is connected to the evaporating part so that heat can be transferred. It is characterized by being That is a vehicle for the cooling system.

Further , as described in claim 2, the interior material in the invention of claim 1 is either an instrument panel, a parcel shelf board, or a tonneau cover arranged on the front side or the rear side in the vehicle interior. It may be.

According to the first aspect of the present invention, a circulation flow path is formed by the evaporation section, the condensation section, and the steam pipe and the liquid return pipe communicating with each other, and a condensable fluid is used as the working fluid in the circulation flow path. It is enclosed. Therefore, when heat is applied to the evaporation unit from the outside, the working fluid is evaporated by the heat, and the vapor flows through the vapor pipe to the condensation unit, where it dissipates heat and condenses. The hydraulic fluid produced by condensation penetrates into the wick. Further, since the wick extends to the evaporation section side, capillary pressure is generated by the evaporation of the working fluid in the evaporation section. As a result, the working fluid that has penetrated the wick is sucked up to the evaporation section side, and the wick draws the working fluid. The sucking state is maintained. On the other hand, since the working fluid vapor continuously flows into the condensing part through the steam pipe, the working fluid generated in the condensing part is pushed to the evaporation part side through the liquid return pipe. In that case, in addition to the wick, the liquid return pipe is formed with a liquid flow path having a flow path cross-sectional area larger than that of the wick, so that the working fluid returns to the evaporation section through the liquid flow path. Since the flow resistance in the liquid flow path is small, the working fluid can be efficiently or smoothly recirculated toward the evaporation section, and as a result, the heat transport capability can be improved. The relative evaporation section of recycling heat pipe, will carry the heat of the interior material by a heat pipe structure, therefore without increasing the evaporation portion, the cabin takes heat from the interior material of large area Since it can discharge | release to the exterior or the vehicle lower part, the cooling capacity of a compartment can be increased.

Further, according to the invention of claim 2, since the heat is taken from the instrument panel or the parcel shelf board or the tonneau cover which is easily subjected to solar heat, the heat is released to the outside of the vehicle compartment or the lower part of the vehicle. Can be suppressed or prevented, and thus the passenger compartment can be efficiently cooled.

The best mode for carrying out the present invention will be described below. First, recycling heat pipe when (hereinafter, simply referred to as a heat pipe) 1 will be described, FIG. 1 shows an example that schematically, an evaporator 3 and the condenser unit 5, a liquid return pipe 8 which The steam pipe 9 having a larger diameter is communicated so as to form a circulation channel as a whole. The inside of the heat pipe 1 is almost completely degassed, and then a condensable fluid such as water or alcohol is enclosed as a working fluid 10.

The container (container) of the evaporation part 3 is comprised by the cylindrical shape, and the some wick 11 and the wick 12 are accommodated in the inside. The wick 11 generates a capillary pressure for refluxing the working fluid 10 to the evaporation unit 3 side. For example, the wick 11 is a porous material made of ceramic, nickel, copper, copper oxide or the like, or a polyethylene resin (for example, Ultra It is a porous material made of a polymer material such as High Molecular Weight polyethylene, and has an effective capillary radius smaller than that of the wick 12 and a greater capillary pressure. When the wick 11 is made of nickel, the nickel particle size is preferably 1 to 20 μm and the porosity is 50 to 80%. In particular, the density of the wick as a whole is 1.98 g / cm ^3. The density of nickel alone is 8.85 g / cm ³ and the porosity is 78%, or the overall density of the wick is 2.23 g / cm ³ , the density of nickel alone is 8.85 g / cm ³ and the porosity is 75. % Wick and the like. Moreover, when the wick 11 is formed of a polyethylene resin, the polyethylene resin preferably has a particle size of 20 μm and a porosity of 50 to 60%.

  On the other hand, the wick 12 is for dispersing and supplying the working fluid to the inner peripheral surface of the container of the evaporation unit 3, and for example, a wire net or a fiber wick is used. The wick 12 has a configuration in which the effective capillary radius is larger than that of the wick 11 and the opening area of the flow path (flow path cross-sectional area) is relatively larger than that of the wick 11. Therefore, the wick 12 is arranged on the outer peripheral side of the wick 11.

  Each of the wicks 11 and 12 has a cylindrical shape with a closed end to which the steam pipe 9 is connected, for example, a bottomed cylindrical shape. Therefore, the inside of the container of the evaporation section 3 is partitioned by the wick 11 or the wick 12 into a hollow portion 13A where the liquid return pipe 8 is opened and a hollow portion 13B where the steam pipe 9 is opened. A hollow portion 13 is formed on the inner peripheral side of the wick 11.

  Furthermore, the condensing part 5 consists of a hollow container, It is preferable to provide many fins in an outer surface in order to expand the thermal radiation area.

Human Topaipu 1 is characterized by the structure of the liquid return pipe 8 is shown the example in FIGS. In FIG. 2, a wick 14 is arranged inside the liquid return pipe 8 along the pipe wall surface. The wick 14 is formed in a cylindrical shape by a porous sintered body using fiber wick, ceramic, metal powder, or the like, and is arranged so as to reach the evaporation section 3 from the condensation section 5. . Therefore, a hollow portion from the condensation portion 5 to the evaporation portion 3 is formed at the center of the wick 14, and this hollow portion is the liquid flow path 14C in the present invention.

  In the example shown in FIG. 3, the wick 14 has a pore diameter, that is, a wick 14A having a relatively large cross-sectional area of the flow path through which the working fluid 10 flows, and a pore diameter relatively smaller than the wick 14A. Therefore, it is comprised by the wick 14B with a relatively small effective capillary radius when the working fluid 10 permeates. These wicks 14A and 14B may both be cylindrical. In the example shown in FIG. 3, a wick 14A having a large hole diameter is arranged on the inner peripheral side, and these wicks 14A and 14B are arranged in the radial direction. It is the structure laminated | stacked on. Accordingly, the hollow portion on the center side of the wick 14A having a large hole diameter serves as the liquid flow path 14C, and the holes in the inner wick 14A serve as the liquid flow path. Here, the liquid flow path is a flow path when the hydraulic fluid is pushed by the working fluid vapor and flows toward the evaporation unit 3 side, and is a portion other than the flow path mainly for flowing at the capillary pressure. is there.

  Accordingly, the wick 14A has a structure in which the flow resistance is relatively smaller than that of the wick 14B because the cross-sectional area of the flow path is large. The wick 14B has a relatively large capillary pressure because the effective capillary radius is smaller than that of the wick 14A.

  Next, the operation when the heat pipe 1 is used in a so-called top heat mode will be described. The top heat mode is a heat transport mode in which the evaporation section 3 heated from the outside is arranged at a position higher than the condensation section 5 that radiates heat to the outside, and heat transport is generated downward. In such a heat transport mode, when the heat pipe 1 is not operating, that is, when there is no heat input to the evaporation section 3, the working fluid 10 does not evaporate, so the working fluid 10 is condensed in a liquid state. It stays on the part 5 side. Since the wick 14 provided inside the liquid return pipe 8 extends on the condensing unit 5 side, a liquid-phase working fluid (hereinafter referred to as working fluid) 10 permeates the wick 14. Since the wick 14 is a member having a porous structure or a small opening width of the gap, capillary pressure is generated at the liquid surface (meniscus) of the penetrating working fluid 10, and thereby the working fluid 10 is sucked upward in the wick 14. . Such a situation is the same even when the wick 14 has the laminated structure shown in FIG. In this way, the hydraulic fluid 10 is held inside the liquid return pipe 8. Further, the wick 14 inside the liquid return pipe 8 and the wicks 11, 12 of the evaporation unit 3 are in communication with each other so that the whole of the wicks 11, 12, 14 is wetted with the hydraulic fluid 10. be able to.

  When the evaporation unit 3 is heated, for example, when the temperature around the evaporation unit 3 increases or the temperature of an appropriate member (not shown) in contact with the container of the evaporation unit 3 increases, that is, the evaporation unit When there is heat input to 3, the hydraulic fluid 10 supplied to the container inner surface of the evaporation unit 3 is heated and evaporated by the wick 12. The steam fills the hollow portion 13B formed inside the container and flows from here to the steam pipe 9. On the other hand, since heat is radiated in the condensing unit 5 and the temperature and pressure inside the condensing unit 5 are lower than those in the evaporating unit 3, the vapor of the working fluid 10 passes through the vapor pipe 9 to the condensing unit 5. Then, the heat is dissipated and condensed in the condensing unit 5.

  On the other hand, the continuous evaporation of the working fluid 10 in the evaporating section 3 causes the meniscus in each of the wicks 11 and 12 to decrease, and the working fluid 10 is further sucked by the capillary pressure associated therewith. Since the wicks 11 and 12 and the wick 14 inside the liquid return pipe 8 communicate with each other, a suction force acts on the working liquid 10 in the liquid return pipe 8 and in the condensing unit 5. Is pumped up to the evaporation section 3. Moreover, since the vapor | steam of the working fluid 10 has flowed in from the steam pipe 9 side continuously with respect to the condensation part 5, the pressure which presses this with respect to the hydraulic fluid 10 of the condensation part 5 to the liquid return pipe | tube 8 side. Works. Therefore, the working fluid 10 of the condensing unit 5 passes through the liquid channel 14C formed in the center of the liquid return tube 8 and the liquid channel which is the hole of the wick 14A having a large hole diameter, and the inside of the liquid return tube 8 Flows toward the evaporation section 3.

In human Topaipu 1 follow, through the liquid flow path 14C, which is formed and the reflux of hydraulic fluid 10 by capillary pressure through the wick 14 disposed in the interior of the liquid return pipe 8, the interior of the liquid return pipe 8 The hydraulic fluid is refluxed. Since the former capillary pressure is also generated at the portion of the wick 14 due to the out of liquid or the like due to running out of the liquid, the reflux of the working fluid 10 through the wick 14 can be ensured reliably and continuously. On the other hand, the liquid flow path 14C has a large flow path cross-sectional area, so that the resistance to the flow of the hydraulic fluid 10 is small. Therefore, even when the heat input to the evaporation unit 3 is large, a necessary and sufficient amount is sufficient. The working fluid 10 can be recirculated to the evaporation unit 3, so-called dryout in the evaporation unit 3 can be prevented, and the heat transport capability of the heat pipe 1 as a whole can be improved.

The heat pipe 1 above SL, since superior thermal transport properties of a so-called top heat mode, can be suitably used for cooling of a portion the heat pipe is not used in the prior art. An example of this will be described below. FIG. 3 schematically shows an example configured as a vehicle compartment cooling device for a vehicle, and an evaporation panel 3 constituting a part of the heat pipe 1 is an instrument panel as an example of an interior material in the vehicle 2. 4 is attached to the back surface. The instrument panel 4 is a portion that becomes a so-called heat generating portion with respect to the heat pipe 1 because the temperature may rise upon receiving sunlight irradiated through the front window 4A.

  The condensing unit 5 is disposed below or above the hood 6 that is outside the vehicle compartment 7. That is, the condensing part 5 is arrange | positioned in the location exposed to the external air outside the compartment 7 in the vehicle 2. In addition, the evaporation part 3 is arrange | positioned relatively upwards rather than the condensation part 5, Therefore, it is used as a top heat mode.

  In the vehicle 2 described above, when sunlight enters the passenger compartment 7, the instrument panel 4 is heated, and the temperature increases. As a result, heat is transmitted from the instrument panel 4 to the evaporation section 3 that is in contact with the back surface of the instrument panel 4, and the working fluid 10 inside thereof is evaporated. On the other hand, the condensing unit 5 is exposed to the outside air or shielded from sunlight, so that the condensing unit 5 has a relatively low temperature with respect to the evaporating unit 3. It flows to the condensing part 5 via the heat and condenses by radiating heat in the condensing part 5.

  On the other hand, from the condensing unit 5 to the evaporation unit 3, as described above, the hydraulic fluid 10 is returned to the liquid return pipe 8 by the capillary pressure by the wicks 11, 12, 14 or the pressurization of the hydraulic fluid 10 by the working fluid vapor. Reflux through. Therefore, even if the evaporation unit 3 is disposed at a relatively high position with respect to the condensing unit 5, the working fluid 10 is sufficiently recirculated with respect to the evaporating unit 3, and the condensing unit 5, i.e., the passenger compartment. Heat transfer from the inside of 7 toward the outside continues. As a result, the heat of the instrument panel 4 is dissipated to the outside of the passenger compartment 7, so that the passenger compartment 7 can be cooled.

In the above-described cooling apparatus using a non Topaipu 1, due to vibration or the like inevitably occurs during traveling of the vehicle 2, also interrupted the flow of internal working fluid 10 in the liquid return pipe 8, the wick 11 and 14 Since the liquid-phase working fluid 10 is sucked by the capillary pressure generated in the above, the interrupted working fluid 10 flows again toward the evaporation section 3. Therefore, it is possible to prevent so-called dry-out in which the evaporation unit 3 is in a dry state and heat transport stops.

Describing another example of constituting a vehicular cooling apparatus according to the present invention below. In addition, the same code | symbol is attached | subjected to the structure same or equivalent to the above-mentioned specific example, and the description is abbreviate | omitted. The cooling device 16 shown in FIGS. 5 to 8 is an example in which the interior of the vehicle 17 is deprived of heat from the interior material on the front side and the rear side to cool the interior of the passenger compartment 19, and a plurality of heat pipes (heat pipe structure) One end portion 18 </ b> A of the body 18 is disposed on the lower side of the instrument panel 20 and the lower side of the rear panel 21 so as to be able to transfer heat with the panels 20 and 21. Therefore, the heat pipe 18 may be attached to the back surface of the instrument panel 20 and the back surface of the rear panel 21. Seats (seats) 22 are disposed on the front side and the rear side of the passenger compartment 19, the instrument panel 20 is disposed on the front side and below the windshield 23, and the rear glass 24 on the rear side of the seat 22. A rear panel 21 is disposed on the lower side.

On each of the front side and the rear side of the vehicle 19, is disposed so as recycling heat pipe 1 described above performs heat transport in a so-called top heat mode, the other end portion 18B of the heat pipe 18 These are connected to the evaporation section 3 in each circulation heat pipe 1. Note that the condensing unit 5 in each circulation heat pipe 1 is installed at a position lower than the evaporation unit 3 and outside the vehicle compartment 19. A large number of radiating fins 26 are attached to the outside of the condensing unit 5.

  Here, an example of a mechanism for connecting each heat pipe 18 to the evaporation section 3 of the circulation heat pipe 1 will be described. The heat pipe 18 and the container of the evaporation section 3 are made of pipe material in terms of manufacturability. However, if they are joined directly, the heat transfer area is reduced. Therefore, in the example shown in FIG. 8, the container of the evaporation unit 3 is formed in a cylindrical shape, and the jacket 27A is fitted in close contact with the outer peripheral side thereof. A cylindrical holder 27B having an inner diameter substantially equal to the outer diameter of the heat pipe 18 is attached to the outer peripheral surface of the jacket 27A by means such as welding. Then, the end portion 18B of the heat pipe 18 is inserted into the holder 27B, and as a result, the end portion 18B of the heat pipe 18 is connected to the evaporation section 3 through the holder 27B and the jacket 27A so as to be able to transfer heat. In addition, it is preferable that the holder 27B is provided with a slit along the axial direction so that the inner diameter thereof is elastically changed from large to small. With such a configuration, the end 18B of the heat pipe 18 is inserted. Work becomes easy and both can be made to stick firmly.

Illustrating the operation of the vehicle cooling system 16. When the instrument panel 20 and the rear panel 21 are heated by sunlight inserted into the passenger compartment 19, the heat is transmitted to the heat pipes 18 below the instrument panel 20 and the rear panel 21. The heat pipe 18 is a container made of a metal pipe such as a copper pipe, for example. The heat pipe 18 contains a wick made of a fine groove, an extra fine wire, or the like and encloses an appropriate working fluid such as water. Therefore, the heat transmitted from the panels 20 and 21 is transported by the heat pipes 18 to the evaporation section 3 of the circulation heat pipe 1. That is, heat is collected from the panels 20 and 21 having a large area by the heat pipe 18 and transmitted to the evaporation unit 3.

Therefore, when the evaporation unit 3 is heated, the circulating heat pipe 1 operates as described above, and heat is transported to the condensing unit 5 as latent heat of the working fluid 10, and heat is dissipated from here to the outside. As a result, the heat in the passenger compartment 19 is released to the outside, and the temperature rise in the passenger compartment 19 is suppressed or prevented, or the interior of the passenger compartment 19 is cooled. Even in the example shown in FIGS. 5 to 8, since the structure to transfer heat to the outside from the vehicle chamber 19 using the circulating heat pipe 1, the heat radiating portion is at the bottom of the vehicle 19 Even in this case, the interior of the passenger compartment 19 can be cooled efficiently and reliably by heat transfer. In particular, if the plurality of heat pipes 18 or the heat pipe structure similar to the above are used, even if the evaporation section 3 of the circulation heat pipe 1 is a small one such as a cylinder, it is wide. Heat is taken from the interior material having an area and carried to the evaporation section 3 and heat can be released to the outside by the circulation heat pipe 1 including the evaporation section 3, so that a vehicle cooling device having excellent cooling capacity can be obtained. it can.

  The present invention is not limited to the specific examples described above. For example, the wick provided in the liquid return pipe 8 shown in FIGS. 1 to 3 may be a narrow narrow groove other than a porous body or mesh. When configured as a vehicular cooling device, the interior material to be cooled may be a parcel shelf board, a tonneau cover, a door waist, a seat, or the like. Furthermore, you may arrange | position a condensation part to the under floor of a vehicle, a fender panel, and a door panel. Further, the engine room of the vehicle can be cooled by the cooling device of the present invention.

Is a schematic diagram showing an example of a recycling heat pipe. It is a fragmentary perspective view which shows a part of the liquid return pipe | tube. It is a fragmentary sectional view of the other structure inside the liquid return pipe. Is a schematic view showing an example of a vehicle cooling system using a circulating heat pipe. Another example of a vehicle cooling system using a circulation-type heat pipe is a schematic plan view showing a. It is a perspective view which shows an example of the cooling device of the front side of the vehicle shown in FIG. It is a perspective view which shows an example of the cooling device by the side of the vehicle shown in FIG. It is a schematic perspective view for demonstrating an example of the mechanism for connecting a heat pipe structure to an evaporation part.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Circulation type heat pipe, 3 ... Evaporating part, 4,20 ... Instrument panel, 5 ... Condensing part, 6 ... Bonnet, 7, 19 ... Car compartment, 8 ... Liquid return pipe, 9 ... Steam pipe, 10 ... Operation Fluid, 11, 12, 14, 14A, 14B ... Wick, 14C ... Liquid flow path, 16 ... Cooling device, 17 ... Vehicle, 18 ... Heat pipe, 21 ... Rear panel.

Claims (2)

The evaporation section heated from the outside and the condensing section that dissipates heat to the outside communicate with each other so as to form an annular flow path by the steam pipe and the liquid return pipe, and are heated and evaporated inside the annular flow path. And a working fluid that condenses with heat dissipation and encloses the fluid , and a wick that generates a capillary pressure for returning the working fluid condensed in the condensing unit to the evaporating unit in the liquid return pipe, and an operation in the wick A circulation type heat pipe provided with a liquid channel having a channel cross-sectional area larger than the opening area of the gap through which the fluid flows;
The evaporator section at the recycling heat pipe is provided with a heat pipe structure disposed in the interior of the lower surface or the interior material of the interior member in a vehicle, the heat transfer can be in its heat pipe structure is the evaporation section A vehicle cooling device characterized by being connected. 2. The vehicle cooling device according to claim 1, wherein the interior material is one of an instrument panel, a parcel shelf board, and a tonneau cover disposed on a front side or a rear side in a vehicle interior.

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