JP2006123825A - Heat radiating structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat radiating structure of a vehicle capable of improving comfortableness in a cabin, while reducing cost. <P>SOLUTION: This structure cools the inside of the vehicle 2 by discharging heat from the cabin of the vehicle 2 to the outside. A plurality of heat transfer members 3 are provided to transmit heat in interior parts 6 and 7 in the vehicle 2 in a manner of being arrayed in the surface direction of the interior parts. A loop type heat pipe 15 for transporting heat as latent heat of condensable working fluid filled into the inside is provided in the vehicle 2 in a state of the evaporating part 11 arranged higher than a condensing part outside the cabin. The heat transfer members 3 are connected to the evaporating part 11 of the heat pipe 15 to be able to transmit heat. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a heat dissipation structure for a vehicle that transports heat from interior parts of the vehicle to the outside of the passenger compartment to cool the passenger compartment or suppress the temperature rise.

  The vehicle is provided with front, rear, and side windows, and an opening or translucent part called a sunroof called a sunroof depending on the vehicle type. At that time, sunlight is radiated into the vehicle interior from these windows and translucent parts. As a result, interior parts such as instrument panels and rear parcels or interior panels absorb sunlight and the temperature rises, causing an increase in room temperature.

  If the temperature of interior members rises due to sunlight, the cabin temperature will rise considerably in the summer, impairing the comfort of the cabin, increasing the load on the air conditioner, and causing the deterioration of interior components, This causes inconveniences such as an increase in thermal stress between the interior part and the vehicle body structure to which the interior part is attached. Therefore, in the invention described in Patent Document 1, the interior part is configured to positively transport heat to the vehicle body panel.

That is, in Patent Document 1, an instrument panel is obtained by bringing a good heat conductor into close contact with a skin structure and joining it to a metal part (such as a dash panel or a steering member) of a vehicle body by using a part or another heat conductor. The heat accumulated in the rear parcel is dispersed to the metal parts of the car body, preventing high heat. That is, in the invention of Patent Document 1, the solar radiation energy absorbed by the interior part is transmitted to the vehicle body panel and released into the atmosphere, so that the rise of the interior part can be suppressed.
JP 2004-42745 A

  The above-mentioned Patent Document 1 is intended to improve heat transfer from the interior part to the vehicle body panel by improving the substantial thermal conductivity of the interior part of the vehicle. In response, the interior parts that heat up or store heat have a large area, so in order to improve the overall thermal conductivity, a structure with a good thermal conductor such as a metal plate attached to the back side, Not only does the weight increase, but there is a disadvantage that the workability is greatly impaired. Further, since the temperature of the interior parts does not necessarily increase when the entire interior part is irradiated with sunlight, there is a possibility that the thermal stress increases. Furthermore, the invention of the above-mentioned Patent Document 1 is configured so that the vehicle body panel serves as a heat radiating portion and heat is transmitted from the interior parts to the vehicle body panel, but the vehicle body panel forms the outer shell of the vehicle. The degree of exposure to light is higher than interior parts. For this reason, the temperature of the vehicle body panel is likely to be higher than that of the interior part. Eventually, there is a high possibility that the heat of the interior part cannot be dissipated to the outside or the heat of the body panel is introduced into the vehicle interior.

  The present invention has been made by paying attention to the above technical problem, and can dissipate heat of an interior member of a vehicle efficiently or in large quantities to the outside of the passenger compartment to suppress an increase in indoor temperature. The object is to provide an apparatus.

  In order to achieve the above object, the invention of claim 1 is a heat dissipation structure for a vehicle that cools the interior of the vehicle by releasing heat from the interior of the vehicle to the interior parts in the vehicle. The heat transfer member arranged in the loop is provided so that heat can be transferred, and the loop type heat pipe that transports heat as the latent heat of the condensable working fluid enclosed inside has a higher evaporation part than the condensation part outside the passenger compartment It is provided in the vehicle in an arranged state, and the heat transfer member is connected to the evaporation part of the loop heat pipe so as to be able to transfer heat.

  Further, the invention of claim 2 is a plurality of divided heat transfer plates in which the heat transfer member in the invention of claim 1 is attached to the back surface of the interior part or arranged inside the interior part, The vehicle heat dissipation structure is characterized in that a total area of one surface of the heat transfer plate is smaller than an area of the surface of the interior part.

  Further, the invention according to claim 3 is the invention according to claim 2, wherein the heat transfer plate included in one divided portion when the interior part is divided into two equal parts by an arbitrary straight line so as to have the same surface area. The ratio of the total area and the total area of the heat transfer plates included in the other divided portion is 0.9 to 1.0.

  Further, the invention of claim 4 is the vehicle heat dissipation structure according to claim 2 or 3, wherein the thickness of the heat transfer plate is half or less of the thickness of the outer structure of the interior part. is there.

  On the other hand, a fifth aspect of the invention is a heat dissipation structure for a vehicle, wherein the heat transfer member according to the first aspect of the invention is a heat pipe provided in a plurality for one interior part.

  The invention of claim 6 is the invention of claim 5, wherein the loop heat pipes are respectively disposed on both end sides of the heat pipe, and each end of the heat pipe is formed of the loop type. A heat dissipation structure for a vehicle, wherein the heat dissipation structure is connected to an evaporation portion of a heat pipe so as to be able to transfer heat.

  A seventh aspect of the present invention is a vehicle heat dissipation structure, wherein the condensing portion according to any of the first to sixth aspects of the present invention is provided at a lower portion of the vehicle.

  On the other hand, the invention according to claim 8 is a heat dissipation structure for a vehicle that cools the inside of the vehicle by releasing heat from the interior of the vehicle, and forms a ring as a whole on the lower surface side of the interior part in the vehicle. A heat pipe encapsulating a condensable fluid that transports heat as latent heat is disposed so as to be able to transfer heat, and the heat pipe is bent so that the lower side of the interior part intersects. It extends to the left and right sides of the vehicle centering on the intersection and is connected to a heat radiating portion provided on both the left and right sides of the vehicle so that heat can be transferred.

  As described in claim 9, the intersection of the heat pipes in the invention of claim 8 can be configured so that heat can be transferred between the parts of the heat pipe.

  Furthermore, in the invention of claim 10, the heat radiation portion in the invention of claim 8 or 9 is constituted by heat radiation fins provided outside the inner surface of the outer panel constituting the vehicle body outer surface of the vehicle. This is a heat dissipation structure for a vehicle.

  According to an eleventh aspect of the present invention, the interior component according to any one of the first to tenth aspects of the present invention is any one of a front panel, an instrument panel, a rear parcel, and a tonneau cover provided in a vehicle. This is a heat dissipation structure for a vehicle.

  According to the first aspect of the present invention, when the interior part is heated by irradiating sunlight or the like, the heat is transmitted to the evaporation part of the loop heat pipe via the heat transfer member. In that case, since the heat transfer member is composed of a plurality of members arranged in the surface direction with respect to the interior part, an increase in weight of the interior part and a decrease in formability or workability can be prevented. The heat transferred to the evaporating part is carried by the loop heat pipe as latent heat of the working fluid to the condensing part and dissipated from the condensing part. As a result, the heat of the interior parts in the passenger compartment is dissipated from the passenger compartment to the outside. It is possible to prevent the temperature rise in the interior parts and the vehicle interior.

  In particular, according to the invention of claim 2, since the heat transfer member for transferring heat from the interior part is constituted by a plate-like member, the temperature rise without impairing the moldability of the interior part. Can be prevented.

  Moreover, in the invention of claim 3, since the arrangement of the heat transfer plates with respect to the interior parts is equalized, heat is evenly transported from each part of the interior parts to the heat transfer plate and the loop heat pipe, and the interior parts Temperature unevenness can be prevented, and the temperature rise of the entire interior part can be suppressed.

  In addition, according to invention of Claim 4, the increase in the thickness of interior components can be suppressed.

  Furthermore, according to the invention of claim 5, since heat of the interior part is transported to the loop type heat pipe by the plurality of heat pipes and is released to the outside by the loop type heat pipe, the interior part can efficiently In addition, a large amount of heat can be taken and released. As a result, even when the amount of heat input to the interior parts is large, the temperature rise can be prevented, and consequently the temperature rise in the passenger compartment can be suppressed.

  Furthermore, according to the invention of claim 6, since the loop type heat pipe that radiates the heat to the outside is provided on both sides of the vehicle, the amount of heat radiation to the outside increases, and the temperature rise in the interior parts and the vehicle interior is further effective. Can be suppressed.

  According to the seventh aspect of the present invention, since the condensing part of the loop type heat pipe is arranged in the lower part of the vehicle body through which the outside air passes when the vehicle is traveling, the heat radiation efficiency or the heat radiation amount through the loop type heat pipe is increased. As a result, it is possible to more effectively suppress the temperature rise in the interior parts and the passenger compartment.

  On the other hand, according to the invention of claim 8, the annular one heat pipe is curved so as to intersect at a part thereof, and the intersecting portion is disposed below the interior part and separated from the intersecting portion. Since so-called both end portions are connected to the heat dissipating parts on both sides of the vehicle so that heat can be transferred, at least one of the heat dissipating parts becomes a condensing part of the heat pipe, and the working fluid enclosed in the heat pipe is The portion disposed below the interior part circulates and flows as an evaporation section, and as a result, the heat of the interior part can be surely released to the outside, and the rise in temperature can be prevented or suppressed.

  According to the ninth aspect of the invention, since the heat fluid vapor and the working liquid in the heat pipe exchange heat at the intersecting portion, the heat transport efficiency by the heat pipe can be improved.

  Furthermore, according to the invention of claim 10, the outer panel of the vehicle can be used as a heat radiating portion, the heat in the vehicle compartment can be released to the outside, and the overall configuration of the apparatus can be simplified.

  According to the eleventh aspect of the present invention, the heat of the front panel, the instrument panel, the rear parcel, or the tonneau cover can be efficiently released to the outside, and the temperature rise and the cabin temperature rise can be prevented. .

  The best mode for carrying out the present invention will be described below. The heat radiating device 1 shown in FIGS. 1 to 5 is configured to take heat from the interior materials on the front and rear sides of the vehicle 2 and to release the heat in the passenger compartment 5 to the outside. A plurality of heat pipes 3 corresponding to a plurality of heat transfer members of the present invention are arranged along the front (front side) and rear (rear side) interior materials in the vehicle compartment 5, respectively. Specifically, as shown in FIG. 5, one end 3 </ b> A of the plurality of heat pipes 3 is in the passenger compartment 5, a front panel 6 provided in the front, and a rear panel (rear parcel) 7 provided in the rear. It is extended along the lower surface side of this, and is arrange | positioned so that heat transfer is possible. The heat pipe 3 may be disposed inside the front panel 6 and inside the rear panel 7. Seats (seats) 8 are disposed on the front side and the rear side of the passenger compartment 5, the front panel 6 is disposed on the front side below the windshield 9, and the rear glass 10 on the rear side of the seat 8 is disposed. A rear panel 7 is disposed on the lower side. The front panel 6 and the rear panel 7 correspond to interior parts in the present invention, and these may be an instrument panel, a parcel shelf board, or a tonneau cover.

  The other end 3 </ b> B of each heat pipe 3 is connected to a cylindrical evaporation part 11 in a loop heat pipe 15 disposed in the front and rear in the passenger compartment 5 so that heat can be transferred. The loop heat pipe 15 is a heat pipe configured by connecting the evaporation unit 11 and the condensing unit 12 so as to form a circulation path as a whole by the steam pipe 13 and the liquid return pipe 14, A condensable fluid such as water is sealed as a working fluid in a degassed state inside the circulation path. Accordingly, the working fluid evaporates by transferring heat from the outside to the evaporating unit 11, and the vapor flows to the condensing unit 12 through the vapor pipe 13. Heat is transported from 11 to the condenser 12 as latent heat of the working fluid. The condensed working fluid returns to the evaporation unit 11 via the liquid return pipe 14.

  The loop heat pipe 15 is for transporting and releasing the heat in the passenger compartment 5, particularly the heat of the panels 6 and 7, to the outside of the passenger compartment 5. It is provided outside the chamber 5. More specifically, the condensing part 12 is arrange | positioned so that it may be exposed to external air at the lower part of a vehicle body. As a result, in the specific example shown in the figure, the evaporation unit 11 with heat input is located higher than the condensation unit 12 that is a heat radiation point, and is a loop type in a so-called top heat mode that performs heat transport from top to bottom. The heat pipe 15 is operated.

  A large number of heat radiation fins 16 are attached to the condensing unit 12 in order to increase the heat radiation area. These radiating fins 16 are thin plate-like members, and each radiating fin 16 is formed with a through hole 16A through which the pipe material constituting the condensing portion 12 passes, and a pipe is formed in the through hole 16A. It is attached to the lower end 15A of the loop heat pipe 15 by closely fitting the material. These radiating fins 16 are arranged in parallel with each other at a predetermined interval so that an air flow generated while the vehicle 2 is traveling passes through a gap between the radiating fins 16.

  Further, the evaporating section 11 has a cylindrical body having a diameter larger than that of the steam pipe 13 and the liquid return pipe 14 as a container 11A, and a mesh or porous body for generating a capillary action for dispersing the liquid-phase working fluid therein. The upper end portion 15 </ b> B of the loop heat pipe 15 is configured with a wick (not shown) made of the like. The shape of the container 11A of the evaporation unit 11 is arbitrary, and may be a rectangular box shape or a hollow flat plate shape.

  The operation of radiating heat from the inside of the passenger compartment 5 to the outside by the heat dissipation device 1 will be described. When the front panel 6 and the rear panel 7 are heated by sunlight inserted into the passenger compartment 5, the heat is transmitted to the heat pipes 3 below or inside the front panel 6 and the rear panel 7. The heat pipe 3 is a container made of a metal pipe such as a copper pipe, for example. The heat pipe 3 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 6 and 7 is transported to the evaporation section 11 of the loop heat pipe 15 by the heat pipes 3. That is, heat is collected from the panels 6 and 7 having a large area and distributed to the inside or the lower side of the panels and transferred to the evaporator 11.

  Therefore, when the evaporation unit 11 is heated, the loop heat pipe 15 operates, heat is transported to the condensing unit 12 as latent heat of the working fluid, and heat is dissipated from here. That is, the liquid-phase working fluid held in the evaporator 11 is heated and evaporated by the heat transmitted from the panels 6 and 7. On the other hand, the condensing unit 12 is disposed outside the passenger compartment 5 and is cooled by the outside air, so that the temperature and pressure inside the condensing unit 12 are lower than the evaporation unit 11. Therefore, the vapor of the working fluid flows through the inside of the steam pipe 13 toward the condensing unit 12, and is condensed by taking heat outside, that is, by radiating heat. The liquid-phase working fluid generated in this way is such that the pressure at the location where the liquid return pipe 14 communicates within the evaporation section 11 is lower than the pressure at the location where the steam pipe 13 communicates, and the condensation section 12. As a result, the working fluid vapor continuously flows into the liquid return pipe 14 and flows back to the evaporation section 11 as an upward flow.

  In this way, the loop heat pipe 15 transports heat as latent heat of the working fluid, so that the heat in the passenger compartment 5 is released to the outside, and the temperature rise in the passenger compartment 5 is suppressed or prevented, Alternatively, the interior of the passenger compartment 5 is cooled. Also in the example shown in FIGS. 1 to 5, since the heat is transported from the inside of the passenger compartment 5 to the outside using the loop heat pipe 15, the heat dissipating part is at the lower part of the vehicle 2. Even in this case, heat can be efficiently and surely transported to dissipate heat from the inside of the passenger compartment 5 to the outside.

  The specific example described above is arranged at a relatively high position in the passenger compartment 5 such as the front panel 6 and the rear panel 7, and is configured to take heat away from the interior material that is susceptible to sunlight. Therefore, even heat from sunlight inserted from the side glass 19 can be dissipated to the outside through the heat pipe 3 and the loop heat pipe 15. In addition, when the side glass 19 is closed and the air conditioner (air conditioner) 18 is operated, the air cooled by the air conditioner 18 stays below the passenger compartment 5 and the air heated by solar heat or the like stays above. However, since the heat radiating device 1 according to the present invention described above takes heat from each panel 67 at a relatively high position and dissipates it to the outside, it efficiently heats from the inside of the passenger compartment 5 in the air-conditioned state to the outside. Thus, the effectiveness of the so-called air conditioner 18 can be improved, and the load on the air conditioner 18 can be reduced to improve the fuel efficiency of the vehicle 2.

  In the heat pipe 3 as the heat transfer member described above, the direction of heat transport is not limited, the working fluid inside evaporates at a place where heat is input, and the working fluid vapor flows at a place where heat dissipation occurs. And transports heat. Therefore, the loop type heat pipe 15 is arranged at each of the both end portions 3A and 3B of the heat pipe 3, and each end portion of the heat pipe 3 is connected to the evaporation unit 11 in each loop type heat pipe 15 so that heat can be transferred. It is good also as a structure.

  The specific example described above is an example in which a plurality of so-called straight pipe-type heat pipes 3 are adopted as heat transfer members that take heat from the interior material and transmit it to the loop heat pipe 15. The heat transfer member that directly takes heat from the material is arranged in a state of being dispersed with respect to the interior material, and as a result, heat is transmitted from each part of the interior material to the loop heat pipe 15 individually. It suffices to be configured. Therefore, the heat transfer member in the present invention may be constituted by the heat pipe 3 described above and a plurality of appropriate heat transfer plates, or directly transfers heat from the interior material to the loop heat pipe 15. You may be comprised by the several heat exchanger plate. Examples are shown below.

  In the example shown in FIG. 6, a heat pipe 3 that is a heat member is provided in the outer structure of the interior part 31 to transport the accumulated heat, and a plurality (two or more) of heat pipes 3 are provided in the heat pipe 3. The heat transfer plates 32 and 33 divided into two are joined so as to be able to transfer heat. The heat pipe 3 includes a linearly extending portion (straight portion) and a portion (bent portion) bent at a predetermined angle (90 degrees) from the portion, and the heat transfer plate 32 is formed on the straight portion. , 33 are connected. The heat transfer plates 32 and 33 are divided in order to maintain the heat transfer amount.

  The interior part 31 is a part made of resin or a composite material containing resin, and the heat transfer plates 32 and 33 are members made of metal or carbon fiber having high thermal conductivity, or a composite material containing them. Specifically, the heat transfer plates 32 and 33 are thin flat plates formed in a rectangular shape, and exposed portions 32A and 33A that are exposed at equal intervals along the outer frame are formed on the surface thereof. A gap 34 is formed in the planar direction between the exposed portions 32A and 33A. One exposed portion 32A is wider than the other exposed portion 33A and is longer than the length of the exposed portion 33A. The exposed portion 32A is joined between the exposed portions 33A so that the tip 32B is joined to the heat pipe 3 so that heat can be transferred, and the end 32C of the heat transfer plate 32 from the joined portion which is the tip 32B. The shape up to is formed in an arch shape (a shape bent outward). That is, the exposed portion 32 </ b> A does not contact the heat transfer plate 33 between the exposed portions 33 </ b> A, and the exposed portion 33 </ b> A does not contact the heat transfer plate 32. Further, the exposed portion 33A is bent so as to wrap the heat pipe 3, and the heat pipe 3 is fixed.

  Therefore, even when the temperature of the entire exterior structure of the interior part 31 is not uniform due to the degree of sunlight irradiation, heat from the exterior structure of the interior part 31 heats through the heat transfer plate 32 and the exposed part 32A. Since it is transmitted to the pipe 3 and is also transmitted to the heat pipe 3 via the heat transfer plate 33 and the exposed portion 33A, the temperature difference between the heat transfer plates 32 and 33 is reduced. Therefore, the heat of the outer structure of the interior part 3 can be transmitted to the heat pipe 3.

  By the way, in the outer structure of the interior part 31, when the temperature near the heat pipe 3 is higher than the temperature far from the heat pipe 3, heat transfer from the near location to the heat pipe 3 can easily occur. However, from the distant place to the heat pipe 3, the place where the temperature is higher (the place near the heat pipe 3) between the places becomes an obstacle, and heat transfer cannot be performed. However, in the specific example shown in FIG. 6, the heat transfer plates 32 and 33 are connected to the heat pipe 3 via the exposed portions 32A and 33A, respectively, so that heat is reliably transferred to a portion close to the heat pipe 3. The portion far from the heat pipe 3 can be connected to the heat pipe 3 without passing through the higher temperature portion. Therefore, the obstacle of transferring heat from the heat transfer plates 32 and 33 to the heat pipe 3 can be solved. As a result, since a large amount of heat can be transferred from the heat transfer plates 32 and 33 to the heat pipe 3, the excellent heat conduction performance of the heat pipe can be used more effectively.

  Next, another embodiment of the heat transfer plate of the present invention will be described. The heat transfer plates 35 and 36 shown in FIG. 7 are thin flat plates formed in a tooth shape, and the tooth profile portions 35A and 36A are alternately arranged at intervals, in other words, the tooth profile portions 35A and 36A It is arranged in a state of being engaged with a gap. An exposed portion 35B is formed at the tip of the tooth profile portion 35A. Each of the tooth profile portions 35A and 36A has a rectangular shape, and the width and length are substantially the same. The heat pipe 3 is disposed at a portion other than the tooth profile portion 36A of the heat transfer plate 36, and the exposed portion 36B wraps and holds the heat pipe 3 in the same manner as the above configuration. Since the exposed portion 35B is joined to the surface of the exposed portion 36B so that heat can be transferred, a gap 37 is formed between the tooth profile portions 35A and 36A in the planar direction.

  Therefore, even when the temperature of the entire exterior structure of the interior part 38 is not uniform due to the degree of sunlight irradiation, heat from the exterior structure of the interior part 38 passes through the heat transfer plate 35A and the exposed portions 35B and 36B. Since the heat is transmitted to the heat pipe 3 and is transmitted to the heat pipe 3 via the heat transfer plate 36 and the exposed portion 36B, the temperature difference between the heat transfer plates 35 and 36 is reduced. Therefore, the same effect as the structure shown in FIG. 6 can be obtained.

  By the way, the interior part has a complicated curved surface or a refracting surface, and is manufactured by a resin molding method using a mold. In this case, if the thickness of the metal used as the heat transfer plate is included at a high ratio with respect to the thickness of the interior part, it becomes difficult to mold the interior part, and the heat transfer conforms to the shape of the interior part. It is necessary to use advanced technology or very expensive equipment to obtain the plates. For this reason, the cost or labor is more expensive than the conventional method. In addition to this, it is very difficult to perform insert molding.

  FIG. 8 is a view showing the outer structure of the interior part N and the thickness of the heat transfer plate D. The thickness t of the heat transfer plate D is the thickness of the outer structure of the interior part N (that is, the interior part N as a whole). The thickness is less than half of T). Specifically, the thickness of the interior part N is 0.1 mm or more, and the thickness of the heat transfer plate D is about 50% or less. In other words, the heat transfer plate D has a role of efficiently transmitting heat accumulated in the outer structure of the interior part N to the heat pipe 3, so that if the thickness of the interior part N is 0.1 mm or more, the heat from the interior part N Can be efficiently taken away and transmitted to the heat pipe 3. Therefore, since the heat transfer plate D can be easily molded with less expensive equipment by this configuration, higher formability or workability can be obtained.

  FIG. 9 is a diagram showing the outer structure of the interior part N and each area of the heat transfer plate D. The area of the heat transfer plate D is smaller than the area of the outer structure of the interior part N. Specifically, the area of the heat transfer plate D (when there are a plurality of heat transfer plates D, the total area of the heat transfer plates D (total area)) is about 40 with respect to the area of the outer structure of the interior part N. ~ 90%. Therefore, even if a portion where heat is difficult to flow by dividing the heat transfer plate D into a plurality of portions can be efficiently transferred from the portion to the heat pipe. Therefore, while maintaining the heat transfer efficiency from the interior part N to the heat transfer plate D to some extent, it becomes possible to improve the moldability as compared with the prior art. Therefore, although the density differs depending on the material, it is not completely specific, but the weight can be reduced to about 50 to 98% compared to the case where metal is used for the entire outer structure of the interior part N. It is possible to reduce an increase in burden during the process.

  Furthermore, if the heat transfer plate is arranged so as to be considerably biased with respect to the outer structure of such an interior part, the difference between the location where heat easily moves and the location where heat does not easily move increases, and the location where heat does not easily move Therefore, the heat pipe is not effectively transferred to the heat pipe where heat is difficult to move. In other words, no matter how much the temperature of other parts of the interior parts is reduced, it is necessary to keep the heat resistance performance as before. It is also necessary to arrange.

  Therefore, as shown in FIG. 10, the area of the interior part N in which a plurality of heat transfer plates D having the same shape are arranged equally is divided into two equal parts, and the total area of the included heat transfer plates D is larger. As a reference, the ratio of the other heat transfer plate D to the larger area serving as the reference is set to “1” or a value close thereto. Specifically, the area of the outer structure of the interior part N is divided into two equal parts by an arbitrary straight line (area bisector) P, whereby the heat transfer plate included in each divided part of the divided interior part N The ratio of the total area of D, that is, the dispersion ratio is configured to be about 0.9 to 1.0. Here, the dispersion ratio is Sa / Sb when the smaller one of the total areas of the heat transfer plates D included in the divided portions is Sa and the larger one is Sb. Therefore, when Sa = Sb or Sa <Sb, Sa / Sb = 0.9 to 1.0. With this configuration, it is possible to maintain both heat transfer efficiency and improve moldability as compared with the prior art. Moreover, even if the part which receives sunlight and the shade part occur in the interior part N, the heat from the part which receives sunlight is efficiently transmitted to the heat pipe 3 to lower its temperature, and the interior part and the cabin temperature It is possible to prevent or suppress the increase.

  In the above embodiment, the heat transfer plate D is made smaller and used in the outer structure of the interior part N. Therefore, the joint portion of the heat transfer plate D is used as a refracting portion, or another heat transfer plate is used at a location where the curvature changes. It is possible to adopt a technique such as using a method, and molding by a method similar to the conventional method is also possible.

  11 and 12 are diagrams showing still another specific example. In this specific example, a plurality of heat transfer plates 42 are arranged at predetermined intervals in the axial direction of the heat pipe 3 in the outer structure of the interior part 41. In front of the heat transfer plate 42 (upper side in FIG. 11), an exposed portion 42A exposed on the surface is formed. That is, the arranged heat transfer plates 42 are arranged uniformly (in six rows with a predetermined interval) along the axial direction of the heat pipe 3 in the outer structure of the interior part 41. Specifically, the heat transfer plate 42 has a notch 43 that is symmetrical in the center, and is configured to increase the bonding strength with the interior part 41 by a so-called anchor effect (throwing effect).

  Further, in the specific examples shown in FIGS. 13 and 14, an elliptical shape is formed in the plane direction between the heat transfer plates 42 in the second row and the third row and between the heat transfer plates 42 in the fifth row and the sixth row. The heat pipes 45 and 46 that are elliptical in the longitudinal cross-sectional direction are arranged so as to be in a non-contact state with the heat pipe 3. The heat pipe 45 has a larger surface area than the heat pipe 46.

  Further, in the specific examples shown in FIGS. 15 and 16, the rectangular heat transfer plate 52 is uniformly arranged along the axial direction of the heat pipe 3 in the outer structure of the interior part 51. An exposed portion 52A is formed at the center of each heat transfer plate 52.

  Accordingly, in the specific examples shown in FIGS. 11 to 16, even when the temperature of the entire interior structure of the interior part is not uniform due to the degree of sunlight irradiation, heat from the exterior structure of the interior part is transferred to each heat transfer plate. , Can be transmitted to the heat pipe via each exposed part. 13 and 14, in addition to the heat transfer, heat from the outer structure of the interior component 44 is transferred via the heat pipe 3 or the heat pipes 45 and 46. Therefore, since the temperature difference per sheet of each heat transfer plate 42 becomes small, the same effect as the structure shown in FIG. 6 can be obtained.

  In the specific example shown in FIGS. 17 and 18, a heat transfer plate 55 having a flat upper shape and a lower lattice shape is disposed in the outer structure of the interior part 54. An exposed portion 55A exposed on the surface is formed at a predetermined interval in the axial direction of the heat pipe 3, and the heat pipe 3 is provided at the tip of the exposed portion 55A. For example, when sunlight hits a grid-like part of the heat transfer plate 55, the heat of that part is dispersed between the grids and moves to the heat pipe 3 via the exposed part 55A. That is, the temperature of the heat transfer plate 55 that has been exposed to sunlight is lowered by the heat dispersion and the heat transfer to the heat pipe 3. Therefore, it can prevent that interior components become high temperature.

  In the specific examples shown in FIGS. 19 and 20, a heat transfer plate 61 having a flat plate shape and a plurality of (three) holes 61 </ b> A formed below is disposed in the outer structure of the interior part 54. An exposed portion 61B exposed on the surface of the flat plate portion of the plate 61 is formed at a predetermined interval in the axial direction of the heat pipe 3, and the heat pipe 3 is connected to the tip of the exposed portion 61B so that heat can be transferred. Yes. For example, when sunlight hits the periphery of the hole 61A of the heat transfer plate 61, the heat of the peripheral portion moves to a portion other than the hole 52 of the heat transfer plate 61 and moves to the heat pipe 3 via the exposed portion 61B. To do. That is, the temperature of the heat transfer plate 61 lit by sunlight is lowered by the heat transfer to the heat pipe 3. Therefore, it is possible to prevent the interior component 54 from becoming high temperature.

  Next, the joining structure between the heat pipe and the heat transfer plate of the present invention will be described. 21 and 22 show an example of a structure in which the heat transfer plate 65 is embedded (wrapped) in the interior part 54. FIG. In this structure, a prismatic part 65A is attached on the surface of the heat transfer plate 65 embedded in the interior part 54 at a predetermined interval in the axial direction of the heat pipe 3, and a heat pipe is attached to the tip of the prismatic part 65A. 3 is attached. FIG. 23 and FIG. 24 are diagrams showing another specific example. In this specific example, the heat transfer plate 67 has a protruding portion 67A protruding at the center thereof, and a heat is applied to the tip of the protruding portion 67A. The pipe 3 is joined so that heat can be transferred. Further, the heat transfer plate 67 is configured such that the surface opposite to the surface on which the projecting portion 67A is formed is recessed, and the projecting portion 68A formed in the interior part 54 is engaged with the recessed portion.

  Further, FIGS. 25 to 27 are diagrams showing still another specific example. In this specific example, the area of the heat transfer plate 71 is made smaller than the outline of the interior part 54. In this structure, the heat pipe 3 is joined to a hooking portion that wraps around the peripheral surface thereof so that heat can be transferred. Specifically, a plurality of prismatic parts 71A are attached to one side edge of the heat transfer plate 71 having a smaller area than the outline of the interior part 54, and a hook portion 72 is provided at the tip of the prismatic part 71A. The heat pipe 3 is fixed by caulking the hook portion 72 so as to wrap the heat pipe 3.

  28 and 29 are diagrams showing still another specific example. In this specific example, a heat transfer plate 75 having the same thickness as the thickness of the interior component 74 is embedded in the center of the interior component 74. Note that the shapes of a plurality of prisms and hooks attached to the heat transfer plate 75 are the same as the shapes of the above-described prisms 71A and hooks 72, respectively. That is, the heat transfer plate 75 and the interior part 74 can exchange heat.

  Further, in the specific examples shown in FIGS. 30 and 31, a plurality of heat pipes 3 are provided, and each of the heat pipes 3 and the plurality of plate-shaped heat transfer plates 84 are connected via a curved exposed portion 85. It is joined so that heat can be transferred. Specifically, an exposed portion 85 exposed on the surface of the flat plate portion of the heat transfer plate 84 is formed at a predetermined interval in the axial direction of the heat pipe 3, and the heat pipe 3 is formed at the tip of the exposed portion 85. Is provided. Further, the exposed portion 85 is bent so as to wrap the heat pipe 3 and fixes the heat pipe 3. The exposed portion 85 is not limited to this specific example. That is, the structure provided with the prisms as described above and joining the heat pipes 3 so as to be able to transfer heat may be used.

  32 and 33 are diagrams showing still another specific example. In this specific example, the above-described heat pipe 45 having the elliptical cross section is added to the structure shown in FIGS. 25 to 27 in two places. The heat pipe 45 is joined to the surface of the heat transfer plate 71 opposite to the surface on which the prism portion 71A is formed so that heat can be transferred. It is arranged in both the place where the temperature is high and the place where the temperature is shaded and the temperature is low (a place where it becomes a shadow). In this configuration, a temperature difference occurs in the interior part 54, and the heat transferred from the interior part 54 to the heat transfer plate 71 is four directions from the center of the heat transfer plate 71 as shown in FIG. 32 (in the direction of the arrow in FIG. 32). The heat is transferred to the heat pipes 3 and 45 whose temperature has been lowered by the heat transfer plate 71 and radiated to the atmosphere (outside the vehicle).

  FIG. 34 is a diagram showing the length of the connection portion with the heat pipe at the exposed (protruded) portion. That is, the length of the portion along the interior part 54 of the heat pipe 3 is L, and the total length of the portion (connection portion) connected to the prism portion 71A (the hook portion 72) is d. At this time, assuming that d / L = 50 to 100%, the total of the length d of the connection portion occupies half or more of the entire length L, so that heat transfer from the heat transfer plate 71 to the heat pipe 3 is performed. It is done efficiently. That is, it is possible to prevent the heat of the heat transfer plate 71 that has become high due to solar radiation from moving to the heat pipe 3, and as a result, the interior parts can be prevented from becoming high temperature or the room temperature becoming high.

  Next, the operation of the vehicle heat dissipation structure of the present invention will be described. FIGS. 35 and 36 are diagrams showing the heat flow of the structure shown in FIGS. 25 to 27. In this structure, first, the temperature of the interior part 54 is increased by solar radiation, and the heat is not subjected to direct light. It is transmitted to the heat transfer plate 71. And, in the heat transfer plate 71, if there is a temperature gradient, heat flows to the low temperature side, so that heat passes through the prism portion 71A (the prism portion 71A and the hooked portion 72) to the heat pipe 3 (in the drawing). Move in the direction of the arrow). As described above, the heat pipe 3 transports heat as a latent heat of the working fluid to a low temperature portion, for example, the evaporation section 11 in the loop heat pipe 15. In this way, the heat of the interior part 54 is transported to the outside of the vehicle and released, so that the interior part and the interior of the passenger compartment can be prevented from becoming hot.

  FIGS. 37 and 38 are diagrams showing the heat flow of the structure shown in FIGS. 28 and 29. In this structure, the temperature of the heat transfer plate 75 is first increased by solar radiation, but the heat of the heat transfer plate 75 is Then, it is transmitted to the heat pipe 3 via the prism portion 71A and the hooking portion 72, and finally diffused to the outside. Therefore, it can prevent that interior components become high temperature.

  Next, a method for creating the outer structure of the interior part joined with the heat transfer plate will be described. First, for each sample, the material that forms the outer structure is cut according to the shape of the heat transfer plate to be joined to the same interior part, and a highly heat-conductive adhesive (Shin-Etsu Chemical Co., Ltd.) is applied to the cut material. A heat transfer plate is bonded using KE-3494) to make an interior part including the heat transfer plate. Then, by connecting a heat conductor to the exposed part of the interior part with a rivet, an outer structure of the interior part having a desired structure can be obtained. As a sample, a heat transfer plate (magnesium) and a rear parcel joined by an insert molding method may be used. After the heat transfer plate is introduced into the outer structure of the interior part, it is directly applied to the plane of the heat transfer plate. Alternatively, a heat conductor connected by rivets may be used.

  Next, another embodiment of the heat pipe of the present invention will be described. 39 to 41, a heat pipe 81 having an annular shape as a whole is provided inside a vehicle 82. The heat pipe 81 is formed in an annular shape by joining both ends of the pipe material to each other, enclosing the working fluid in a deaerated state therein, and provided with a wick that generates capillary pressure as necessary. The heat pipe has a so-called “8” shape by being locally bent or bent. The intersecting portion generated by bending the heat pipe 81 in this way is disposed below the interior part 83 of the vehicle 82, and a plurality of the end portions farthest from the intersecting portion, that is, the folded bent portion, are arranged. A heat sink 84 having heat radiating fins is joined so as to be able to transfer heat.

  More specifically, the heat pipes 81 are arranged on the front (front) side and the rear (rear) side in the passenger compartment 85, and the heat pipes 81 installed in the instrument panel 86 are arranged on both sides. It is joined to a heat sink 84 installed along an outer plate panel 87 such as a fender panel or a door panel so that heat can be transferred. Further, the intersecting portion of the heat pipe 81 is in the instrument panel 86 and is bent so as to extend from here to the heat sink 84 side.

  42 and 43 show a structure in which the right and left symmetrical portions of the heat pipe 81 are provided with an inclination through which the hydraulic fluid cooled by the heat sink 84 passes. The inclination of the left-right symmetric part may be an inclination that allows the working fluid to flow by gravity. For example, the inclination may be a downward slight inclination (inclination angle of about 5 degrees). When it inclines, the distance between the front-end | tip of the left-right symmetric part and the heat sink 84 becomes long, and causes the capability fall of the heat pipe 81. That is, in this structure, since the left and right symmetrical portions are slightly inclined, the hydraulic fluid cooled by the heat sink 84 travels through the heat pipe 81 using the inclination. Therefore, the flow of the working fluid in the heat pipe 81 can be assisted, so that the backflow of the working fluid can be prevented and the working fluid can be carried to a position lower than the heat sink (radiation fin). Further, FIG. 43 shows a slope of a portion that becomes a so-called upward flow accompanying the return of the working fluid to the heat collecting surface side of the instrument panel and the rear parcel from the symmetrical portion of the heat pipe 81 that has been lowered by the above-described slope. A configuration with a reduced angle is shown. Such a configuration can be achieved by bringing the lowest portion of the portion inclined downward toward the heat sink 84 closer to the heat sink 84.

  In the above structure, in order to assist the flow of the working fluid, a wick (not shown) that uses capillary force with a porous material such as a wire mesh, fiber, felt, foam metal, fine wire, sintered metal, etc. is provided in the heat pipe. ) May be provided. In this configuration, increasing the inclination as gently as possible (about 4.5 degrees or less) can be used without lowering the circulation capacity of the heat pipe. That is, by using this wick, water can be pumped by the capillary pressure of the wick. Therefore, since water can be sent to the upper heat collecting surface, circulation in the heat pipe can be improved.

Examples of the wick include a sintered metal such as nickel and a porous body such as ceramic or metal powder. Specifically, when the wick is formed of nickel, it is preferable that the nickel has a particle size of 1 to 20 μm and a porosity of 50 to 80%, and 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.

  Next, the cooling state of the heat pipe using this wick will be described. For example, when the entire instrument panel in the passenger compartment is heated by incident light or the like entering the passenger compartment, the evaporation part of the heat pipe ("8" -shaped heat with the instrument panel thermally joined) Heat is applied from the outside to the joint portion of the pipe). A working fluid is sealed in the annular flow path of the heat pipe. Therefore, a liquid-phase working fluid is circulated inside the evaporation portion of the heat pipe, and the wick is wet with the working fluid. When heat is applied to the evaporation portion of the heat pipe, the liquid-phase working fluid comes into contact with the inner surface of the evaporation portion, or the liquid-phase working fluid in the vicinity thereof is heated to evaporate.

  When the working fluid evaporates in the outer periphery of the wick, a meniscus is generated at the opening end of the hole formed in the wick, or the liquid level in the hole is lowered, and a pumping force due to capillary pressure is generated. Accordingly, the liquid-phase working fluid is supplied from the inside of the wick so as to be dispersed on the outer peripheral surface through the inside of the wick on the evaporation portion side of the heat pipe. As a result, the liquid-phase working fluid is supplied to almost the entire inner peripheral surface of the evaporation portion of the heat pipe. After that, the working fluid vapor reaches the inside of the condensing part (joint part of the “8” -shaped heat pipe to which the heat sink is thermally joined) through the evaporation part, and releases heat to the outside here. Condense. The resulting liquid-phase working fluid is sucked by the capillary pressure generated in the wick, and returns to the evaporation section through the liquid return pipe.

  As described above, once the working fluid starts to circulate in the heat pipe, the following circulation cycle starts to move. That is, the suction of the liquid-phase working fluid from the condensing part due to the capillary pressure of the wick → the movement of the liquid-phase working fluid from the wick to the evaporation part due to the capillary pressure of the wick → the evaporation of the working fluid inside the evaporation part → the evaporation part The working fluid vapor moves from the condenser to the condensing part → The working fluid vapor condenses inside the condensing part → The working fluid circulates by the suction of the liquid working fluid from the condensing part due to the capillary pressure of the wick and the accompanying heat transport Arise. Therefore, inside the heat pipe, the working fluid is efficiently circulated by the capillary pressure generated in the wick and the wick. As a result, the heat pipe can radiate the heat of the instrument panel to the outside of the passenger compartment, so that the temperature inside the passenger compartment can be prevented from rising, and the interior of the passenger compartment can be brought to a comfortable temperature. In addition, this heat pipe becomes an evaporating part at a place where the temperature of the sun is high, and a condensing part at a place where the temperature of the shadow is low. The temperature of the nearer part is lowered by the part closer to the part where the temperature of the shadow is lower.

  Next, the structure of the intersection in the heat pipe 81 will be described. In FIG. 44, the intersecting portion of the heat pipe 81 is joined by an adhesive 88 so as to be able to transfer heat. Accordingly, the portion of the heat pipe 81 that is exposed to sunlight is heated and the working fluid evaporates here, and the opposite side becomes shade and the temperature is relatively low. Becomes the condensing part. As a result, a part of the heat pipe 81 that is in contact with or contained in the instrument panel 86 becomes a conduit through which the evaporation portion or working fluid vapor flows, and half of the heat pipe 81 becomes a conduit through which the condensation portion or hydraulic fluid flows. At the intersection, heat exchange between the working fluid vapor and the working fluid occurs. Therefore, heat transport by the latent heat of the working fluid and heat transport by sensible heat occur at the same time, so that the heat transport efficiency by the heat pipe 81 is improved.

  FIG. 45 is a diagram showing another structure of the intersecting portion. In this example, the intersecting portions of the heat pipes 81 are connected by a cubic object 89. In this structure, since the intersecting portion of the heat pipes 81 is fixed by the object 89, heat exchange between the heat pipes 81 can be reliably performed.

  Next, the joining structure between the heat pipe and the heat sink of the present invention will be described. 46 shows a structure in which the heat sink 84 is attached to the fender 90. FIG. 47 and 48, the heat sink 84 has a structure in which the radiating fins 84A are arranged at equal intervals, and a groove portion 84C extending along the plane direction is formed in the flat base portion 84B. The heat dissipating fins 84A are formed integrally with the base portion 84B. For example, when the base portion 84B is attached to the fender 90, a space portion along the groove portion 84C is formed between the groove portion 84C of the base portion 84B and each surface of the fender 90. A heat pipe 81 is disposed inside the space portion, and the heat pipe 81 and the heat radiation fin 84A (base portion 84B) are joined so that heat can be transferred. The heat sink 84 may be attached in front of the side door 91 as shown in FIG. 49 (front side).

  Further, FIG. 50 is a diagram showing another example of the joining structure of the heat pipe 81 and the heat sink 84. In this example, a hollow cylindrical portion 92 extending in the plane direction is formed on the flat base portion 84B. A heat radiation fin 84A is formed integrally with the hollow cylinder portion 92 and the base portion 84B. The heat pipe 81 is disposed inside the hollow cylindrical portion 92, and the heat pipe 81 and the heat radiation fin 84A (base portion 84B) are joined so as to be able to transfer heat. In this case, by making the heat pipe 81 into a “8” -shaped structure, the heat sink 84 can be freely installed without being particular about installation on the lower portion of the vehicle 82 having a relatively low temperature. Therefore, the difference in height of the position of the heat pipe 81 is reduced, so that the heat transport capability can be maximized.

  Next, a method for fixing the heat pipe to the vehicle 82 will be described. FIG. 51 is a diagram showing a structure in which the heat pipe 81 is provided in the plate-shaped heat collecting section 93. The heat collecting portion 93 is provided with a concave cover 94, and a heat pipe 81 is fixed (fastened) between the concave portion 94 A of the cover 94 and the surface of the heat collecting portion 93. This heat collection section 93 is installed in the instrument panel and rear parcel, and is made of resin, composite material containing resin (woody material, felt, hybrid material obtained by solidifying fiber material with resin, synthetic leather, fabric, etc. And is joined to the heat pipe 81 so that heat can be transferred.

  In addition to this structure, heat conduction can be assisted by inserting a heat transfer plate (not shown) between the interior part and the heat pipe. In this case, the material of the heat transfer plate is preferably a metal with an emphasis on thermal conductivity, for example, steel material if selected at low cost, aluminum, magnesium, or if selected based on light weight and high thermal conductivity, or Such alloys. Therefore, in this structure, since the temperature rise of the instrument panel 86 (or the rear parcel) in which direct sunlight is incident is effectively suppressed, it is emitted from the instrument panel during driving after parking in hot weather in summer. Discomfort due to radiant heat can be reduced.

  52 to 54 are diagrams showing a method of fixing the heat pipe 81 to a fixing part such as the heat collecting part 93. For example, an adhesive 95 shown in FIG. 52, a bolt 96 shown in FIG. 53, a rivet 97 shown in FIG. 54, and the like are used for fastening the cover (or bracket) 94 and the heat collecting section 93. Therefore, by using this fixing method, the area of the fastening portion of each member can be increased and the gap between the fastening portions can be filled, so that the heat transfer coefficient between the members can be improved.

  Next, another embodiment of the heat pipe mounting structure of the present invention will be described. FIG. 55 is a diagram in which a plurality of heat pipes are arranged side by side, and the end portion on the folded side of one heat pipe is deformed in an arc shape so that the heat pipes overlap each other. Specifically, one end of the heat pipe 101 is bent in a trapezoidal shape so as to overlap the inside of the heat pipe 81, and its axial length is shorter than that of the heat pipe 81, In addition, the axial length perpendicular to the axial direction is also shortened. Therefore, the one heat pipe 101 holds the heat pipe 81, and a plurality of the heat pipes 81, 101 are arranged and joined together so as to be able to transfer heat. Thus, the heat transport capability as a whole can be improved by comprising so that heat exchange is possible also between heat pipes 81 and 101. FIG.

  Next, still another embodiment of the heat pipe mounting structure of the present invention will be described. FIG. 56 is a view showing a structure in which a part of the heat pipe 81 is brought into contact with the dash panel in the passenger compartment 85 so that heat can be further transferred. That is, in the example shown in FIG. 56, the working fluid that has received heat from the instrument panel 86 and has flowed toward the heat sink 84 dissipates heat in the heat sink 84, but if the temperature of the working fluid is still somewhat high, During the flow from the 84 side to the instrument panel 86 side, the dash panel 86A is deprived of heat and the temperature drops or condenses. As a result, the heat radiation site can be increased.

  Next, the operation of the heat dissipation structure in which the heat pipe is provided in a “8” shape will be described. FIGS. 57 and 58 are diagrams illustrating the operation of the heat dissipation structure of the vehicle in each heat pipe 81 shown in FIGS. 42 and 43. As shown in FIG. 57 (A), the heat of the instrument panel 86 (interior part) heated by sunlight at the time of parking in the hot sun passes through the heat pipe 81 installed in the instrument panel 86 and the outer panel. It moves to the inner surface of the outer panel 87 via the heat sink 84 installed on the 87th surface. On the other hand, the heat of the high-temperature air inside the passenger compartment 85 and outside the outer panel 87 also moves to the inner surface of the outer panel 87 via the heat sink 84. The heat of the outer panel 87 is released from the outer surface of the outer panel 87 to the outside of the vehicle (in the direction of the arrow in the figure). Thereby, it can prevent that an instrument panel (vehicle interior) becomes high temperature.

  In this case, the vehicle 82 is provided with two left and right outer plate panels 87. Therefore, as shown in FIG. 57 (B), even if one outer panel 87 is exposed to sunlight and heated, the other outer panel 87 is not exposed to sunlight. A temperature difference is generated between the heat sinks 84 installed in 87, and the higher one is the evaporation section and the lower one is the condensation section. Since the heat pipe 81 is bent in the shape of “8”, even if the temperature of one heat sink 84 rises, the flow of the working fluid flows into the heat pipe 81 with the heat sink 84 having the lower temperature. Wake up and circulation of the working fluid occurs throughout the heat pipe 81. Therefore, even if the heat sink 84 having a higher temperature can radiate heat and the temperature of the instrument panel 86 cannot be lowered, the heat sink 84 having a lower temperature can radiate heat, so the temperature of the instrument panel (vehicle interior) is lowered. be able to. In other words, this structure reduces the thermal load in the passenger compartment 85, thereby reducing discomfort to the human body, reducing fuel consumption, and reducing fuel consumption by reducing the size of air conditioners. Contribution to improvement is also possible.

  Further, in the structure in which the intersections of the heat pipes 81 are connected using the object 89 as shown in FIG. 58, the left side portion of the heat pipe 81 close to the portion where the temperature of the sun is high has a low shadow temperature. The temperature is lowered by the right side portion of the heat pipe 81 close to the location. Therefore, it can prevent that an instrument panel (vehicle interior) becomes high temperature.

  Next, experimental results of the vehicle heat dissipation structure of the present invention will be described. FIG. 59 shows 3 hours when the vehicle is left with the front facing south for 5 hours from 11:00 am under the outdoor air condition of 35 ° C. and the predetermined conditions of Examples 1 to 4 and Comparative Examples 1 to 3. It is a figure which shows the result of having measured the temperature of the driver's seat head after.

  Specifically, in the first to fourth embodiments, in the vehicle (8-shaped heat pipe vehicle) 82 in which the “8” -shaped heat pipe shown in FIG. 4 days of fine weather during September, the installation position of the heat pipe is the instrument panel, rear parcel, or one of these positions, and the heat sink position is the left and right fenders, left and right door skins, or any of these In the case of this position, the temperature of the driver's seat head was 46.6 ° C to 52.3 ° C.

  Further, in Comparative Example 1, the temperature of the driver's head is 60.9 ° C. when the implementation date is one day of fine weather in July for a vehicle (normal vehicle) in which no heat pipe is arranged. . Further, in Comparative Examples 2 and 3, in a vehicle (heat pipe single-wire vehicle) in which two single-wire heat pipes are installed side by side, the implementation date is set to two days of fine weather in August, and the installation position of the heat pipe is When the position of the instrument panel or the rear parcel was used and the position of the heat sink was the position of the left and right fenders or the left and right rear fenders, the temperature of the driver's seat head was 53.8 ° C to 54.5 ° C. Although not shown, the single wire heat pipe is formed in a straight line at the center in the instrument panel, and is formed so that both ends are bent and extend along the heat sink.

  FIG. 60 is a diagram showing the temperature results of the driver's seat head in Example 1 and Comparative Examples 1 and 2. From FIG. 60, it can be seen that the temperature of the driver's seat head in the vehicle is lower in the order of Comparative Example 2, Comparative Example 3, and Comparative Example 1, and more specifically, in the case of a single-wire heat pipe vehicle than in a normal vehicle. It can be seen that the temperature is reduced, and that the temperature of the figure 8 heat pipe vehicle is lower than that of the single wire heat pipe vehicle.

  Next, a method for attaching the heat pipe of the present invention to a vehicle will be described. First, an aluminum plate is installed under the skin of the instrument panel, and the aluminum plate and the heat pipe are joined by a bolt and a heat transfer paste. Next, a heat pipe provided with a heat sink inside the outer plates of the left and right front fenders is joined at the intersection. In this case, the heat sink is installed and changed inside the outer plates of the left and right doors. Next, an aluminum plate is placed under the skin of the rear parcel, and the aluminum plate and the heat pipe are joined together by a bolt and a heat transfer paste. Next, heat pipes provided with heat sinks inside the outer plates of the left and right rear fenders are joined at the intersections. Next, install heat pipes for both the instrument panel and rear parcel. As a result, the left and right front and rear fenders each have a structure of a heat radiating portion.

  Furthermore, another method for attaching the heat pipe of the present invention to a vehicle will be described. First, an ordinary vehicle without a heat insulation / heat dissipation structure is prepared. Next, a vehicle is prepared in which a single-wire (rod-shaped) heat pipe is arranged on the instrument panel. Next, the center of the heat pipe is the structure of the heat collecting part, and both ends are the structures of the left and right fenders. On the other hand, a vehicle is prepared in which a single wire of the heat pipe is disposed in the rear parcel. Similarly, the center of the heat pipe has a heat collecting part structure, and both ends of the heat pipe have a left and right fender structure. As mentioned above, the vehicle heat dissipation structure of the present invention can obtain all the effects of the present invention by adopting these structures.

  In each of the above specific examples, the experiment of the vehicle heat dissipation structure of the present invention is not limited to the above experiment. In other words, the interior parts are actually mounted on the vehicle, the temperature in the vicinity of the interior parts is measured from 9 am to 3 pm by exposure under the sun, and the temperature is continuously recorded on a storage medium (oscilloscope). You may compare temperature in the part used as temperature. Therefore, the effect of reducing the thermal load can be confirmed by this experiment.

  Further, in each of the above specific examples, “joining so that heat can be transferred” is an example in which both surfaces are fixed without gaps using welding members, bolts and nuts, rivets, heat transfer paste, and the like so that heat conduction is not interrupted. It is a state that has been. Moreover, in each of the above-described specific examples, "" 8 "-shaped" means, for example, an instrument panel or a portion that intersects like a character "8" at the lower part of the vehicle central portion of the rear parcel, This is a state where a heat sink (an outer panel such as a fender) is connected to the structure of the heat pipe having the intersection. Further, in each of the above specific examples, the heat conductor is joined to the heat transfer plate, but the present invention is not limited to the above-described configuration. That is, the heat conductor may be fixed by being embedded in the heat transfer plate. And in each above-mentioned specific example, although a heat pipe is fixed to a heat collecting part, a heat sink, a fender, etc., in this invention, it is not limited to said structure. That is, screwing with bolts and nuts, welding, adhesion with a heat conductive sealing material, fastening with paste, or the like can be applied.

  Furthermore, in this invention, you may provide the heat insulation layer in the outer surface of a heat pipe. As a material for the heat insulating layer, for example, a foamed resin sheet or a fiber heat insulating material can be applied. Moreover, in the manufacturing process of the instrument panel, when the foamed urethane is injected between the base material and the skin and the cushion layer is formed, the heat insulating layer may be formed simultaneously. For example, if a heat insulating layer is provided on the heat pipe, the heat transmitted from the heat pipe is prevented from leaking into the internal space of the instrument panel, so that the temperature of the parts and the room temperature can be prevented from rising. Heat transferred from the left and right fenders can be transferred efficiently.

  In each of the specific examples described above, the working fluid may be water, methane, ammonia, freon, methanol, etc., and the material of the heat pipe container (container) is copper, copper alloy aluminum, various stainless steels, low carbon Steel or a pipe having a double structure may be used when strength is required. That is, it is possible to select a working fluid and a heat pipe suitable for the working fluid in consideration of cost and performance (according to operating temperature and operating environment). In each of the specific examples described above, the left and right fenders having an instrument panel / rear parcel and a heat sink, which are heat inlets to which direct sunlight enters, may be configured to be thermally conductive. The “thermally conductive structure” is a structure that is connected by contact and has high thermal conductivity. With this structure, the solar radiation energy absorbed by the instrument panel is efficiently transmitted to the left and right fenders and released into the atmosphere, so that the temperature rise in the passenger compartment can be effectively suppressed.

  In each of the specific examples described above, the interior part of the present invention is not limited to the above-described configuration. That is, in this interior part, a copper plate heat transfer plate having the same area as the structure is joined to the outer structure of the instrument panel, and a heat pipe made of a copper tube is connected near the end of the heat transfer plate. It may be an instrument panel, or an instrument panel made of a resin that is usually applied to a vehicle. In the present invention, the member for transferring heat from the interior parts in the vehicle interior by the heat transfer member may be an evaporation part of a loop type heat pipe other than the so-called straight pipe type heat pipe described above. .

It is a top view which shows an example of the heat dissipation structure of the vehicle of this invention. It is a perspective view which shows an example of the thermal radiation structure of the front side of the vehicle shown in FIG. It is a perspective view which shows an example of the thermal radiation structure of the rear side of the vehicle shown in FIG. It is a side view which shows an example of the thermal radiation structure of the lower part of the vehicle shown in FIG. It is a perspective view which shows the principal part in the thermal radiation structure of the vehicle shown in FIG. It is a figure which shows the example of the heat sink in the heat radiating structure which concerns on this invention. It is a figure which shows the other example of the heat sink in the heat radiating structure which concerns on this invention. It is a longitudinal cross-sectional view which shows the thickness of the heat sink. It is a figure explaining the area of the heat sink. It is a figure explaining the dispersion rate about the heat sink in the heat radiating structure concerning this invention. It is a figure for demonstrating the state of the heat transfer by the thermal radiation structure of this invention. It is AA arrow sectional drawing of FIG. It is a figure for demonstrating the state of the heat transfer by the other thermal radiation structure which concerns on this invention. FIG. 14 is a cross-sectional view taken along line B-B in FIG. 13. It is a figure which shows an example of the arrangement structure of the heat exchanger plate and heat pipe in the thermal radiation structure which concerns on this invention. It is CC sectional view taken on the line of FIG. It is a figure which shows the further another example of the heat sink in the heat radiating structure which concerns on this invention. It is DD sectional view taken on the line of FIG. It is a figure which shows the further another example of the heat sink in the heat radiating structure which concerns on this invention. FIG. 20 is a cross-sectional view taken along line EE in FIG. 19. It is a figure which shows the other example of the heat sink in the heat radiating structure which concerns on this invention. FIG. 22 is a cross-sectional view taken along line FF in FIG. 21. It is a figure which shows the further another example of the heat sink in the heat radiating structure which concerns on this invention. FIG. 24 is a sectional view taken along line GG in FIG. 23. It is a figure which shows the further another example of the heat sink in the heat radiating structure which concerns on this invention. It is a HH arrow directional cross-sectional view of FIG. FIG. 26 is a cross-sectional view taken along line JJ in FIG. 25. It is a figure which shows the other example of the heat sink in the heat radiating structure which concerns on this invention. FIG. 29 is a cross-sectional view taken along line LL in FIG. 28. It is a figure which shows the further another example of the heat sink in the heat radiating structure which concerns on this invention. FIG. 31 is a cross-sectional view taken along line MM in FIG. 30. It is a figure which shows the further another example of the heat sink in the heat radiating structure which concerns on this invention. FIG. 33 is a cross-sectional view taken along line NN in FIG. 32. It is a figure for demonstrating the mutual relationship of the length of the heat exchanger plate in the thermal radiation structure which concerns on this invention, and the connection part with respect to the heat pipe. It is a figure for demonstrating the effect | action of the thermal radiation structure of FIG. It is a figure for demonstrating the effect | action of the thermal radiation structure of FIG. It is a figure for demonstrating the effect | action of the thermal radiation structure of FIG. 28 and FIG. It is a figure for demonstrating the effect | action of the thermal radiation structure of FIG. 28 and FIG. It is the schematic perspective view which abbreviate | omitted partially which shows the other example of the thermal radiation structure of the vehicle of this invention. It is the schematic side view which a part of which showed the heat dissipation structure of FIG. 39 was abbreviate | omitted. It is a perspective view which shows the heat pipe of FIG. It is a front view which shows an example of the structure of the heat pipe of this invention. It is a front view which shows the other example of the structure of the heat pipe of this invention. It is a perspective view which shows an example of the structure of the cross | intersection part of the heat pipe. It is a perspective view which shows the other example of the structure of the cross | intersection part of the heat pipe. It is a perspective view which shows an example of the heat sink in the thermal radiation structure which concerns on this invention. It is the enlarged view to which the I section of FIG. 46 was expanded. It is a figure which shows an example of the attachment structure of the heat pipe with respect to the heat sink. It is a fragmentary figure which shows an example of the position of the heat sink. It is a perspective view which shows another example of the joining state of the heat pipe and heat sink in this invention. It is a perspective view which shows the other example of the joining state of the heat pipe and heat sink in this invention. It is sectional drawing which shows an example of the fixing structure of the heat pipe. It is sectional drawing which shows the other example of the fixing structure of the heat pipe. It is sectional drawing which shows the further another example of the fixing structure of the heat pipe. It is a figure which shows the example of arrangement | positioning in case two or more character-shaped heat pipes are arranged. It is a perspective view which shows roughly the example comprised so that it might radiate to a dash panel from the "8" character type heat pipe concerning this invention. It is a figure for demonstrating the thermal radiation state by a "8" character type heat pipe. It is a figure for demonstrating the thermal radiation state by another "8" character type heat pipe. It is a figure which shows the experimental result of the thermal radiation structure of the vehicle of this invention. It is a figure which shows the experimental result of the thermal radiation structure of the vehicle of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Radiating device, 2 ... Vehicle, 3, 81, 101 ... Heat pipe, 5 ... Car compartment, 6 ... Front panel, 7 ... Rear panel, 11, 23 ... Evaporating part, 12 ... Condensing part, 13 ... Steam pipe, 14 ... Liquid return pipe, 15 ... Loop type heat pipe, 31,38,54,74,83, N ... Interior parts, 33,34,35,36,42,52,55,65,71,75,84, D ... heat transfer plate, 84 ... heat sink, 86 ... instrument panel, 87 ... outer plate panel.

Claims (11)

A heat dissipation structure for a vehicle that cools the interior of the vehicle by releasing heat from the interior of the vehicle,
A plurality of heat transfer members arranged in the surface direction of the interior parts in the vehicle are provided so as to be able to transfer heat, and a loop type heat pipe that transports heat as latent heat of the condensable working fluid enclosed therein is provided. The heat dissipation of the vehicle is provided in the vehicle in a state where the evaporation portion is disposed higher than the condensation portion outside the passenger compartment, and the heat transfer member is connected to the evaporation portion of the loop heat pipe so as to be able to transfer heat. Construction.   The heat transfer member is a plurality of divided heat transfer plates attached to the back surface of the interior component or disposed inside the interior component, and the total area of one surface of the heat transfer plate is The vehicle heat dissipation structure according to claim 1, wherein the vehicle heat dissipation structure is smaller than a surface area.   The total area of the heat transfer plate included in one divided portion and the heat transfer plate included in the other divided portion when the interior part is divided into two equal parts by an arbitrary straight line so that the surface area is equal. The vehicle heat dissipation structure according to claim 2, wherein a ratio of the total area is 0.9 to 1.0.   4. The vehicle heat dissipation structure according to claim 2, wherein a thickness of the heat transfer plate is equal to or less than half of a thickness of an outer structure of the interior part.   The heat dissipation structure for a vehicle according to claim 1, wherein the heat transfer member is a heat pipe provided in plural for one interior part.   The loop heat pipes are respectively disposed on both end sides of the heat pipe, and each end of the heat pipe is connected to an evaporation part of the loop heat pipe so as to be able to transfer heat. The vehicle heat dissipation structure according to claim 5.   The vehicle heat dissipation structure according to any one of claims 1 to 6, wherein the condensing part is provided in a lower part of the vehicle. A heat dissipation structure for a vehicle that cools the interior of the vehicle by releasing heat from the interior of the vehicle,
A heat pipe which is formed in a ring shape on the lower surface side of the interior part in the vehicle and encloses a condensable fluid that transports heat as latent heat as a working fluid is disposed so as to be able to transfer heat, and the heat pipe is the interior part. The heat pipe is bent so as to intersect with each other, and the heat pipe extends to both the left and right sides of the vehicle around the intersection, and is connected to a heat radiation portion provided on both the left and right sides of the vehicle so that heat can be transferred. The vehicle heat dissipation structure.   9. The heat dissipation structure for a vehicle according to claim 8, wherein each of the heat pipes is configured to be able to transfer heat at an intersection of the heat pipes.   10. The vehicle heat dissipation structure according to claim 8, wherein the heat dissipation portion is configured by a heat dissipation fin provided outside the inner surface of the outer panel constituting the outer surface of the vehicle body of the vehicle. .   11. The vehicle heat dissipation structure according to claim 1, wherein the interior part is any one of a front panel, an instrument panel, a rear parcel, and a tonneau cover provided inside the vehicle.

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