JP7313743B1 - Thermal insulation structure for mobile equipment - Google Patents

Abstract

[Problem] By applying a material with high reflectance to radiant heat such as aluminum foil on the surface of the interior base material of equipment such as automobiles and railway vehicles that move outdoors, movement is immediate, lightweight, and has a large cooling and heating effect. Provides a heat shield structure for the body. SOLUTION: A heat shield structure 10 for a moving object is constructed in a vehicle 30, a container 20, or the like that moves outdoors and has a cooling device inside, and is installed on the indoor side of an interior base material 2 that constitutes the vehicle 30, the container 20, or the like. In addition, a material 4 having a high reflectance against radiant heat, such as aluminum foil, is applied in contact with the atmosphere. By constructing the heat shield structure 10 for a moving body of the present invention in the vehicle 30 or the container 20, the cooling/heating effect can be increased. [Selection drawing] Fig. 1

Description

The present invention relates to a heat shielding structure for mobile bodies that is quick, lightweight, and has a high cooling and heating effect by applying a material with high reflectivity to radiant heat, such as aluminum foil, on the surface of the interior base material of vehicles such as automobiles, railroad vehicles, aircraft, and ships that move outdoors, and equipment such as shipping containers.

Automobiles and containers with a heat shielding effect have been disclosed (for example, Patent Document 1). Intrusion of heat from the outside is prevented by installing heat shielding materials between the interior and exterior materials of automobiles and by applying heat shielding paint to the exterior of containers.

In the container described in Patent Document 1, a heat shield sheet is interposed between the exterior panel and the interior material forming the inner wall surface, so that external radiant heat is reflected by the heat shield sheet with high efficiency.

Japanese Patent Application Laid-Open No. 2020-186040

The characteristics of automobiles, railroad vehicles, etc. that move outdoors require that the overall volume be as small as possible, but that the interior volume be as large as possible. As a result, it is necessary to reduce the space between the exterior material and the interior material. Most of the heat that moves between the exterior material and the interior material is radiant heat, so if heat insulation is considered, it is considered most effective to use a heat shield material in the space between the exterior material and the interior material. In this case, the heat shielding material secures an air layer between the exterior and interior materials, and on both sides of the heat shielding material, making it easy to use the high reflectance and low emissivity properties of the heat shielding material.

For example, looking at the example inside the wall of a building, the proportions of heat transferred in the space between the exterior and interior materials are conductive heat 6%, convective heat 29%, and radiant heat 65% (total 100%). If one layer of heat shielding material with a reflectance of 85% is provided in this space, the proportion of the heat is conductive heat 6%, convective heat 29%, and radiant heat 6%, for a total of 41%. Then, it looks as if the amount of heat transfer has decreased from 100% to 41%, but when viewed conversely, 41% of the heat is transferred.

It should be noted that the ratio of conductive and convective heat has not decreased. That is, when the radiation side is in a small space, the influence of conductive heat and convective heat is great, and it is necessary to reduce this as much as possible. Automobiles have similar structures and environments, so they are considered to have similar performance. Therefore, when it is constructed between the interior material and the exterior material, the original performance of the heat shield material is not fully utilized.

SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and it is an object of the present invention to provide a heat shielding structure for a moving body that has an immediate effect and a large cooling and heating effect.

The heat shield structure of a moving body according to the present invention is constructed in a moving body that moves outdoors and has a cooling device inside, and is characterized in that a material having a high reflectance against radiant heat, such as aluminum foil, is formed in contact with the atmosphere on the indoor side of the interior base material that constitutes the moving body.

The heat shield structure of a moving body according to the present invention is constructed in a moving body that moves outdoors and has a cooling device inside, and is characterized in that the colored layer and the protective layer are formed in contact with the atmosphere on the indoor side rather than a material having a high reflectance against radiant heat such as aluminum foil.

The heat shield structure for a moving body according to the present invention is characterized in that the moving body is a vehicle such as an automobile, a railroad vehicle, an aircraft, a ship, or a transportation container.

In the heat shield structure for a moving body according to the present invention, a material having a high reflectance against radiant heat, such as aluminum foil, is applied on the interior side of the interior base material that constitutes the moving body having a cooling device inside so that it is in contact with the atmosphere. On the indoor side, materials with high reflectance against radiant heat, such as aluminum foil, are in contact with the atmosphere, so the cooling and heating effects are great and these effects are immediate.

In addition, the heat shield structure of the moving body according to the present invention is constructed in a moving body having a cooling device inside, and the colored layer and the protective layer are formed in contact with the atmosphere on the indoor side rather than a material with a high reflectance against radiant heat such as aluminum foil. By constructing this heat-shielding structure of the moving body, in addition to increasing the cooling and heating effect, it is possible to create a diffuse reflection layer for sunlight and prevent corrosion of materials with high reflectance against radiant heat such as aluminum foil.

(a) It is sectional drawing of the heat-shielding structure of the mobile body built in the ceiling part of the motor vehicle which is a mobile body which concerns on embodiment of this invention. (b) It is sectional drawing of the heat-shielding structure of the moving body which constructed|assembled exterior materials, such as a floor material, and interior equipment of the moving body which concerns on embodiment of this invention. It is the figure which constructed|assembled the heat-shielding structure of the mobile body which concerns on embodiment of this invention in the container. It is the figure which constructed|assembled the heat-shielding structure of the mobile body which concerns on embodiment of this invention in the container. It is a figure which built the thermal insulation structure of the mobile body which concerns on embodiment of this invention in the railway vehicle. It is a figure which built the thermal insulation structure of the mobile body which concerns on embodiment of this invention in the railway vehicle.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out the present invention will be described below with reference to FIGS. 1 to 5. FIG.

Heat moves from the hot side to the cold side. Vehicles such as automobiles, railroad vehicles, aircraft, and ships, as well as moving bodies (moving equipment) such as shipping containers, are directly exposed to the sun and are in sealed spaces, so they are susceptible to the effects of radiant heat, which has the greatest energy. Therefore, it is necessary to emphasize the influence of radiant heat for energy saving and measures against heatstroke.

As shown in FIG. 1(a), the heat shielding structure 10a for a moving object according to the present invention is provided with a heat shielding material 6 on the front side (inside the room) of an interior base material 2 in which a predetermined static space (static air layer) 3 is formed between the exterior material 1 and the interior base material 2. The heat shielding material 6 includes a high reflectance material 4 (hereinafter also referred to as a high reflectance material 4) against radiant heat such as aluminum foil, and a colored layer (protective layer) 5 provided on the front side (indoor side) of the high reflectance material 4. The colored layer 5 is provided on the indoor side of the high reflectance material 4 and is in contact with the atmosphere. In addition, as shown in FIG. 1B, the heat shielding structure 10b of the moving body according to the present invention is configured with only the high reflectance material 4 (heat shielding material 6) on the front side (inside the room) of the exterior material 1 (interior base material 2). Also in this case, the high reflectance material 4 is provided on the indoor side and is in contact with the atmosphere.
A cooling device is provided on the indoor side of the moving body.

It is generally known that the high reflectance material 4 is effective in blocking radiant heat. There are six major points to prevent radiant heat and maximize performance.

First, the most effective cooling and heating effect for small spaces such as automobiles and railway vehicles is to use the high reflectance material 4 on the interior side of the moving body. The fact that the radiation side of the high reflectance material 4 is close to the human body has an immediate effect and a large energy-saving effect above all.
The second is that the radiation side of the high reflectance material 4 faces the still space 3 which is as large as possible. If the radiation side is close to the static space 3, it can be said that the influence of convective heat is small. Also, if there is a large space, a rapid temperature rise can be avoided.
The third is to use the high reflectance material 4 on the entire indoor surface of the moving body as much as possible. The effect of the high reflectance material 4 is proportional to the area, so it is preferable to shield as large an area as possible.

Fourth, the temperature of the radiation side of the high reflectance material 4 is low. Since radiant heat increases as the fourth power of absolute temperature, it is very important to keep the temperature on the radiant side low. For example, if there is a gap or the like on the construction surface or around the high reflectance material 4, heat flows out to the radiation side, the temperature of the radiation side of the high reflectance material 4 rises, and as a result, the performance of low radiation is greatly reduced.
Fifth, the slight heat radiated to the radiation side of the high reflectance material 4 should be absorbed by a cooling device or the like. Allowing a small amount of heat will result in an increase in the temperature of the radiating side, with the same result as before.
Sixth, the radiation side of the high reflectance material 4 has nothing to contact. If metal objects, furring strips, or various materials are in contact with the radiation side, conductive heat is transferred from the high reflectance material 4 to these materials, resulting in significant heat loss.

The heat shielding structures 10a and 10b of the mobile body of the present invention have a cooling device inside and are constructed in a mobile body that moves outdoors, for example, a vehicle such as an automobile, a railroad vehicle, an aircraft, a ship, or a transportation container.

Hereinafter, the heat shield structures 10a and 10b of the moving body of the present invention will be specifically described with reference to FIGS. 2 to 5. FIG. FIGS. 2 and 3 are diagrams of the heat shield structure for a moving object constructed in a transport container, and FIGS. 4 and 5 are diagrams of the heat shield structure constructed on a railway vehicle.

As shown in FIGS. 2 to 5, various materials such as plastic, leather, cloth, metal, and glass are used for the interior base material 2 of a transport container 20 and a vehicle (railroad vehicle) 30. The heat shield structure 10a (10b) of the moving body of the present invention blocks the radiant heat moving between the outdoor side and the indoor side of these facilities by applying a high reflectance material 4 to the indoor surface of these materials. In other words, by making the high reflectance material 4 and the colored layer 5 contact with the air, the structure is such that the low radiation performance is fully utilized.

Moreover, it is important to keep the temperature of the radiation side of the high reflectance material 4 low. Since radiant heat is proportional to the fourth power of absolute temperature, an increase in the temperature on the radiation side is not only undesirable, but may even produce the opposite effect. That is, as a method of suppressing the amount of radiation into the interior of the transportation container 20 and the railroad vehicle 30, it is preferable to provide cooling devices 21, 31 such as air conditioners on the interior side of these moving bodies. Even if heat enters the room, if there is equipment such as an air conditioner, it can be absorbed immediately, and the temperature rise inside the room can be prevented by the material 4 having a high reflectance against the radiant heat such as aluminum foil.

Radiant heat is reflectance + emissivity = 100%. That is, the high reflectance material 4 has the performance of efficiently reflecting this radiant heat or radiating it very little. Also, in order to efficiently bring out the performance, it is preferable that the high reflectance material 4 faces the room air, which is a large space where the temperature on the radiation side is less likely to rise. In a large space, infiltrating heat is more likely to diffuse into the atmosphere inside the room than in a narrow space, and as a result, the temperature rise on the radiation side of the high reflectance material 4 is small.

When the high reflectance material 4 is provided on the indoor side, only a very small amount of radiant heat, which is the greatest heat directed from the outdoors to the indoor side in summer, is radiated to the indoor side, and cooling devices 21, 31 such as air conditioners can cool in a short time and maintain a low temperature.
On the other hand, in winter, since the high reflectance material 4 is in contact with the surface of the interior base material 2, the heat in the room is reflected by the high reflectance material 4 and returned to the inside of the room.

Since the high reflectance material 4 is provided on the indoor side, there is no interior base material that must be overheated or cooled by the heat in the room, and the rise and fall of the room temperature are shortened accordingly, creating an environment with immediate effect. An environment with an immediate effect can be said to be an environment that brings about a large energy-saving effect.

The purity of aluminum is important for the high reflectance material 4, and generally a material with a purity of 99% or more is used. In the present invention, one with a purity of 99.5% or higher is used. In addition, many materials with a reflectance of 95% to 98% for radiant heat are used. The high reflectance material 4 is mostly aluminum foil, and generally has a thickness of several microns to 10 microns. However, the thickness is often determined by the problem of the construction site, and has almost no relationship with the reflectance of radiant heat.
Flexibility is required for ceiling materials, floor materials, etc. In such places, aluminum vapor deposition (aluminum vapor deposition) materials are effective. Currently, aluminum vapor deposition is possible on most materials, and various colors can be made. Aluminum vapor deposition is as thin as 10 to several hundred nm, and the reflectance often varies depending on the thickness of the vapor deposition layer. Of course, high reflectance is preferable, but the thickness is not specified. In any case, it is very light in terms of weight, and even if it is used on the entire surface of the equipment, a significant weight reduction and effect can be expected. Of course, if the reflectance is high, other materials can be used regardless of aluminum vapor deposition.

The present invention is characterized in that the colored layer 5 and the protective layer are formed in contact with the air on the indoor side of the high reflectance material 4, and also proposes a heat shielding structure 10a for moving bodies such as vehicles such as automobiles, railroad vehicles, aircraft, and ships that move outdoors, and facilities such as transportation containers.

Since the high reflectance material 4 uses the performance of the original high reflectance as it is, it is preferable that the surface is a shiny mirror surface with nothing applied. However, automobiles, railroad vehicles, aircraft, ships, and the like, in which people stay inside, are always exposed to sunlight from the outside to the inside. Since the high reflectance material 4 has the same performance as a mirror, when the high reflectance material 4 is irradiated with sunlight, the reflected light damages human eyes. Therefore, in the present invention, the surface of the high-reflectance material 4 is coated with a coating or a high-transmittance resin layer that allows the radiant heat to pass through well, so that the sunlight is diffusely reflected. Paint and high-transmittance resin layers that transmit radiant heat well are located on the interior surface where people are present, so their function as an interior base material is also important, and colored materials are used for these. The colored layer 5 and the protective layer are the coating and the highly transmissive resin layer which transmit radiant heat well.

Further, it is conceivable that a substance that corrodes the high reflectance material 4, such as sweat or spilled food, may come into contact indoors. Therefore, by providing the colored layer 5 and the protective layer, such a problem can be solved. However, there is no problem even if the colored layer 5 and the protective layer are not provided in a space where people do not always stay, such as a shipping container or a truck.
When the colored layer 5 and the protective layer are applied, the reflectance of radiant heat naturally decreases. However, although it depends on the wavelength, it is about 73% to 95%, but it is not a big problem considering that the heat shielding area is greatly increased. The colored layer 5 and the protective layer are not particularly limited to this method as long as they have a diffuse reflection structure so as not to damage human eyes, do not cause electrolytic corrosion when in contact with metal, and have properties such as acid resistance and alkali resistance.

As a method of constructing the material 4 with high reflectance, there are at least the following methods.
The first method is to vapor-deposit a high-purity aluminum material directly on the interior base material 2 . It can be used widely from solid materials such as plastic and glass to cloth products, leather products, and ceiling insulation materials. The aluminum vapor deposition layer is extremely thin, making it an ultra-lightweight heat shield structure.
The second is a method of attaching high-purity aluminum foil to the interior base material 2 by adhesion, heat welding, or the like. Since aluminum foil is a plate-like (film-like) material, it can be used by being directly attached to a solid material such as plastic, glass, or metal.
The third method is to apply a heat shielding material 6 in which aluminum foil is heat-sealed to a non-woven fabric or a resin sheet on the exterior material/interior base material 2 such as plastic or metal so that the aluminum foil faces the room side.

Since aluminum foil may cause electrolytic corrosion when used in contact with metal, such a construction method is available as a preventive measure. For example, even a complicated metal flooring material with irregularities can be easily molded by bonding the heat shielding material 6 to a flat plate and pressing, so that it can be used for many things. In the present invention, the method of applying the aluminum layer to the interior base material 2 is not limited, and it is sufficient that the material 4 having a high reflectance with respect to radiant heat such as aluminum foil is applied to the interior side surface of the interior base material 2, and any method or other method may be used.

Next, the mechanism of the heat shield structure of the moving body of the present invention will be described in detail.
For example, in a car, the direction of heat transfer changes between summer and winter, just like a building. Furthermore, the same is true during running and stopping. As a matter of course, heat moves from the outdoor side to the indoor side in summer, and conversely, heat moves from the indoor side to the outdoor side in winter. However, the major difference from a building is that the movement of an automobile releases the heat of the exterior material 1 to the outside through convection in summer, and conversely increases the amount of heat that enters the room in winter. Until now, we have considered that these facilities are equivalent in both summer and winter throughout the year.
From this point of view, the heat shielding structure for a moving object according to the present invention is a structure that emphasizes low radiation performance for maximizing heat shielding performance.

It is considered that the heat that moves in the space between the exterior material 1 and the interior base material 2 is greatly affected by radiant heat, as is the case with buildings. Also, it is well known that the high reflectance material 4 is effective in blocking radiant heat. In the summer, the exterior material 1 of the automobile is irradiated with radiant heat from the outside. This is the reason why the exterior material 1 of the automobile is hot when touched from the outside. This heat is radiated from the exterior material 1 toward the interior base material 2 as secondary radiant heat, most of which is absorbed by the interior base material 2 and transferred to the interior of the room as tertiary radiant heat. Of course, conductive heat is also transferred at this time, but it is considered that it is clearly less than radiant heat.

In order to prevent secondary radiant heat from the exterior material to the interior base material, it has been considered effective to provide a heat shielding material using a high reflectance material between them. If a heat shielding material with high reflectance material applied on both sides is provided between the two, the heat shielding material with high reflectance against radiant heat should efficiently reflect the secondary radiant heat from the outdoors and radiate it to the outside. However, the still air layer on the outdoor side of the heat shielding material tends to become extremely hot due to the temperature rise of the exterior material, which raises the temperature of the heat shielding material. However, at this stage the heat on the reflective side is retained and very little is radiated to the emitting side. Importantly, some material, such as furrings or bolts, is used to attach the heat shield between the exterior and interior substrates and provide a static air layer on either side of the heat shield. Conductive heat is then transferred from the reflective side to the radiating side through these members. In addition, since the periphery of such a space, that is, the exterior material and the interior base material are naturally in contact with each other, conductive heat is similarly transferred to the radiation side here as well. Furthermore, when the heat shielding material is in contact with the interior base material such as the ceiling, heat is transferred from this point as well. In this way, the heat transferred from the reflection side to the radiation side of the heat shield material results in a large amount of heat, even though the heat transfer from each portion is small. Moreover, since the static air layer is formed on the radiation side of the heat shield material and is in a sealed state, the heat transfer in the static air layer is small, but the structure is such that the heat is difficult to escape from the space to the outside. That is, a small space in which heat is stored is created. This accumulated heat raises the surface temperature of the radiation side of the heat shielding material, promoting an increase in the amount of radiation from the heat shielding material. The amount of radiation is according to the law proportional to the fourth power of absolute temperature.

The present invention is a method of constructing a high reflectance material 4 on the entire surface of the interior base material 2 facing a large space such as a room, not such a narrow space, and maximizing the low radiation performance of the heat shielding performance. In summer, radiant heat from the outdoors is absorbed by the exterior material 1 as described above, secondary radiant heat is directly radiated to the interior base material 2, and the interior base material 2 becomes hot. What is important here is the temperature on the radiation side. There is an air conditioner (cooling device 21, 31) on the radiation side, which immediately absorbs the slight amount of heat that is radiated. That is, the surface temperature of the high reflectance material 4 does not rise, and its performance can be used reliably.

What is of concern here is the relationship between the body temperature and the surface temperature of the high reflectance material 4 . The body temperature is obviously higher than the surface temperature of the high reflectance material 4 . Then, according to the theory of heat that heat moves from the high temperature side to the low temperature side, the body temperature is radiated toward the surface of the high reflectance material 4 . What is important at this time is where the radiant heat radiated from the body is reflected by the surface of the high reflectance material 4 and where it goes. As a result, most of the indoor temperature is lower than the body temperature, so the reflected radiant heat is radiated to the base material such as the sofa, and hardly warms the high-temperature human body.
Furthermore, the heat shield construction area occupies most of the room. Since the heat shielding effect is proportional to the construction area, it is far greater than the case where the heat shielding material is provided between the exterior material 1 and the interior base material 2 .
In winter, since the high reflectance material 4 is all applied to the inner skin of the interior base material 2 on the indoor side, if there is heat from an air conditioner or the like in the room, the heat does not need to warm the interior base material 2 and the room is warmed in a short time.

On the other hand, in a mobile object such as a vehicle, the heat of the engine is transferred to the interior of the vehicle, so it is important to insulate the boundary wall between the engine room and the cabin. Considering that the high reflectance material 4 is applied to the engine side of the boundary wall, the high reflectance material 4 efficiently reflects the radiant heat and is considered to be effective. However, since the vehicle runs, the high reflectance material 4 receives not only radiant heat but also convection heat from the engine. The high reflectance material 4 is a material having a high thermal conductivity, and the temperature of the heat shield material 6 itself rises as soon as it absorbs the temperature, which is eventually transmitted to the boundary wall on the indoor side in the form of conductive heat and enters the room. Conversely, when considering construction on the indoor side of the boundary wall, this time the radiation becomes low.
If a high reflectance material 4 with a reflectance of 98% is used, only 2% of the radiant heat is radiated indoors. That is, most of the radiant heat can be blocked. It should be noted that the heat on the engine side reaches the radiation side surface of the high reflectance material 4 . When some material is brought into contact with it from the inside of the room, conductive heat is generated, and the heat is supplied to the inside of the room. In other words, it is important to minimize material contact in order to utilize the low radiation performance.

In many cases, heat is constantly entering the refrigerator from the outside of the refrigerator car. Needless to say, it is effective to use the high reflectance material 4 on the indoor side in order to prevent this. However, the point to note is that the air speed of the cooling fan that cools the inside of the cold storage is fast. When the wind comes into contact with the surface of the high reflectance material 4, it takes heat and enters the room. As a countermeasure against this, it is important to reduce the flow velocity in the area contacting the high reflectance material 4 by dispersing or changing the blowing direction of the blowing from the cooling fan. In the case of a cold storage, other heat insulation methods require a narrower indoor space, but in the present invention, it can be attached directly to the exterior material 1 or the interior base material 2, so that space can be secured and transportation volume is not reduced. This is a great advantage. Also, the energy saving effect is increased, and the fuel efficiency can be improved.

The transport container 20 is made of metal and has a radiant heat reflectance of about 10%. Moreover, since it is used outdoors for a long time, the amount of heat is considerable. To prevent this, it is effective to construct the high reflectance material 4 on the indoor side. If the heat shielding material 6 with a reflectance of 98% is used, the amount of radiant heat transmitted to the inside is only 2%. However, if this heat is left as it is, the amount of radiation will increase in proportion to the fourth power of the absolute temperature. To improve the performance of such a small space, it is necessary to absorb 2% of the amount of radiation. In other words, by installing an ultra-compact cooling system, it is possible to continuously create a space with a very good environment.

It is quite natural to be provided with blankets when boarding an airplane, but if a space with a large number of people is kept at a constant temperature, there are individual differences in the appropriate temperature, and it is natural that some people feel cold and others feel hot. Since heat and cold are determined by room temperature and the amount of radiant heat, it is important to reduce the amount of radiant heat in order to reduce individual differences. That is, it is very effective to use the high reflectance material 4 for the interior base material 2 of railroad cars, buses, ships, and the like.

In railway cars, the doors are opened at each station for passengers to get on and off, and there is a lot of air going in and out. That is, it is preferable that the heat flow is very large and the interior of the room can be heated or cooled in a short period of time. According to the present invention, a material 4 having a high reflectance against radiant heat, such as aluminum foil, is applied to the surface of the interior base material 2, so that a significant energy-saving structure can be constructed. Above all, it is the passengers who feel the most effect, who can immediately feel warmth or coolness.

[Test 1]
A square frame of 20 cm x 20 cm was made from a hard urethane material with a cross section of 30 mm x 30 mm. A square corrugated member made of Galvalume steel plate (registered trademark) was attached to one surface, and a 5 mm urethane mat was attached to the other surface. On the surface of this urethane mat, a heat shielding material 3 mm×5 cm×12 cm (THB-JB3 manufactured by Nippon Thermal Shaft Co., Ltd.) with aluminum deposited on one side of a polyester cotton sheet was adhered so that the aluminum deposited surface faced the radiation side. The surface of the heat shielding material is coated with a colored layer that has a diffuse reflection structure that does not hurt human eyes. The reflectance of the heat shield material is 1800 nm: 73%, 800 nm: 79%, 1400 nm: 95%, and the weight per unit is 73-91 g/m ² . This box was placed in front of a far-infrared heater of 1000 W so that the square wave material made of Galvalume steel plate (registered trademark) was on the heater side. A thermo recorder was attached to the heater-side surface of the galvalume steel sheet (registered trademark) square corrugated material, and the temperature was gradually raised from 40°C to 80°C. At this time, the surface temperatures of the urethane mat and the heat shield were measured by thermography. Room temperature was 22°C.

[Result 1]
Results 1 of Test 1 are shown in [Table 1] below.

[Discussion]
(a) When the temperature of the iron plate on the heater side is 40°C, the vapor-deposited heat shielding material of THB-JB3 is 4.1°C lower than the urethane mat alone, and when the temperature is 80°C, it is 9.0°C lower.
(b) In other words, THB-JB3 emits little radiation, which proves that it is effective in preventing heat stroke and saving energy.

[Test 2]
A correspondence test was conducted on the part where high temperature heat comes to the indoor side from the outdoors.
Two boxes of 300 mm × 300 mm × 300 mm were made from black Galvalume Steel Plates (registered trademark) so that the black color was on the outside, and a heat shielding material (THB-CX manufactured by Nippon Heat Shield Co., Ltd., single-sided aluminum foil) was directly attached to the inside of one of the boxes. This box was placed in front of a far-infrared heater of 1000 KW, and the heater-side temperature and the temperature inside the box were measured with a thermo recorder. Room temperature was 23.5°C.
Non-insulated box A: surface temperature (1), internal temperature (3)
Box with heat shield B: surface temperature (2), internal temperature (4)

[Result 2]
Results 2 of Test 2 are shown in [Table 2] and [Table 3] below.

[Discussion 2]
(a) Looking at the surface temperature on the heater side, as the temperature rises, the temperature (2) where the heat is shielded becomes higher. This indicates that the heat shielding material makes it difficult for heat to enter the box.
(b) Conversely, looking at the temperature inside the box, the temperature 4 of the heat-shielded box is maintained at a lower temperature.
(C) When the temperature (2) on the heater side without heat shielding is 80°C, the temperature inside the box without heat shielding (3) is 38.7°C, and the temperature inside the box with heat shielding (4) is 33.7°C, with a difference of 5.0°C. That is, it can be seen that heat shielding has a large temperature blocking effect, and at the same time, it can be seen that the difference increases as the temperature rises.

Most of the interior base materials facing the interior side are covered with a material having a high reflectance against radiant heat, and there is no need to heat or cool extra members, so the cooling and heating effect can be exhibited in a short time. As a result, a large energy saving effect can be produced.
As a matter of course, the amount of radiant heat radiated into the room is reduced, so it is very effective against heatstroke.

There is no contact with low-temperature metal parts, and the rise in the surface temperature of materials with high reflectance against radiant heat, such as aluminum foil, can prevent the occurrence of dew condensation. Therefore, it can also correspond to cold district specifications. In addition, the entire surface of the interior base material may be vapor-deposited with aluminum. When aluminum is vapor-deposited, the material becomes extremely lightweight, and improvement in fuel efficiency of vehicles and the like can be expected.

Although the present embodiment has been described above, it is possible to select the configurations mentioned in the above-described embodiments or to change them to other configurations as appropriate without departing from the gist of the present invention.

1 exterior material 2 interior base material 3 static air layer (static space)
4 Materials with high reflectivity against radiant heat such as aluminum foil (high reflectivity materials)
5 Colored layer (protective layer)
6 heat shielding materials 10a, 10b heat shielding structure for moving body 20 container (transportation container)
30 Vehicles (Railway Vehicles)
21,31 Cooling device (air conditioner, etc.)

Claims (3)

A heat shield structure for a moving body that moves outdoors and is constructed in a moving body that has a cooling device inside,
A material having a high reflectance against radiant heat, such as aluminum foil, is formed in contact with the atmosphere on the interior side of the interior base material that constitutes the moving body,
A material having a high reflectance against radiant heat such as the aluminum foil is exposed in the room to be cooled and is provided directly on the interior base material.
A heat shield structure for a moving body, characterized by: A heat shield structure for a moving body that moves outdoors and is constructed in a moving body that has a cooling device inside,
A material having a high reflectance against radiant heat such as aluminum foil is provided on the indoor side of the interior base material that constitutes the moving body,
The colored layer and protective layer are formed in contact with the atmosphere on the indoor side rather than the material with high reflectance against radiant heat such as aluminum foil ,
The colored layer and the protective layer are exposed in the room to be cooled, and a material having a high reflectance against radiant heat such as aluminum foil is directly provided on the interior base material.
A heat shield structure for a moving body, characterized by: The mobile body is a vehicle such as an automobile, a railroad vehicle, an aircraft, a ship, or a transportation container.
3. The heat shield structure for a moving body according to claim 1 or 2, characterized in that:

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