Radiation cooling device for vehicle

Abstract

The purpose of the present invention is to cool a portion where the temperature can rise due to sunlight while suppressing power consumption. A radiation cooling device for a vehicle is provided with: a roof panel (50) of the vehicle, the outer surface of which is provided with a radiation cooling layer (51) that radiates far infrared rays toward the outside of the vehicle; a roof garnish (60) disposed along the vehicle interior side surface of the roof panel; a cold air space (rm) which is a space partitioned by the roof panel and the roof garnish; a temperature variation unit (10) which is disposed in the front or rear of the vehicle interior and which can increase the temperature by sunlight; a pillar garnish (30) that constitutes the pillar and is disposed along the side surface of the interior of the vehicle; an air suction port (31) disposed adjacent to the temperature variation portion of the pillar garnish; a space-forming member (40) that is disposed between the air suction port and the cold air space and in a space surrounded by the pillar and the pillar garnish, and that forms a circulation space (41) through which a fluid flowing in from the air suction port can flow; and an air flow generator (90) that is disposed in the cold air space and that generates an air flow from the air suction port to the cold air space through the circulation space.

Description

Technical Field

[0001] This invention relates to a radiative cooling device for vehicles. Background Technology

[0002] Traditionally, vehicle interiors have been designed to control temperatures by installing air conditioning equipment, such as air conditioners, to prevent the interior from becoming excessively hot. Existing technologies related to temperature control within the vehicle interior include methods of directing air generated by the vehicle's air conditioning system to the headroom of the front or rear seats via ducts located in the pillars or headliner.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: (Japan) Utility Model Application Publication No. 3-109905 Summary of the Invention

[0006] The technical problem that the invention aims to solve

[0007] The inventors focused on the fact that the technology described in Patent Document 1 cannot directly suppress the temperature rise near the dashboard and other areas due to sunlight, and that the power consumption of the air conditioning system tends to increase when the area is to be cooled by the air conditioning system.

[0008] The purpose of this invention is to suppress power consumption and effectively cool parts that are prone to temperature rise due to sunlight.

[0009] Technical solutions for solving technical problems

[0010] One aspect of the present invention is a radiative cooling device for a vehicle, comprising a roof panel, a roof trim, a cooling space, a temperature regulating section, pillar trim, an air intake, a duct, and an airflow generator. The roof panel has a radiative cooling layer on its outer surface that radiates far-infrared rays towards the vehicle. The roof trim is disposed along the interior side of the roof panel. The cooling space is configured as a space divided by the roof panel and the roof trim. The temperature regulating section is configured as a portion disposed at the front or rear of the vehicle interior that allows the temperature to rise due to sunlight. The pillar trim is disposed along the interior side of the pillar. The air intake is disposed adjacent to the temperature regulating section of the pillar trim. A space-forming component is disposed between the air intake and the cooling space, and is surrounded by the pillar and the pillar trim, forming a flow space through which fluid flowing in from the air intake can circulate. The airflow generator is disposed within the cooling space, generating an airflow from the air intake through the flow space towards the cooling space. Attached Figure Description

[0011] Figure 1The diagram showing the implementation of the vehicle radiant cooling device is an observation of the vehicle interior from the side.

[0012] Figure 2 It is a cross-sectional view intersecting the length direction of the pillars in the vehicle. Detailed Implementation

[0013] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the drawings, the same parts are labeled with the same reference numerals, and repeated descriptions are omitted. In the drawings, the sizes and proportions of the parts are exaggerated for ease of understanding of the embodiments, and sometimes differ from the actual sizes and proportions.

[0014] In each diagram, arrows labeled X, Y, and Z are used to indicate the vehicle's direction. X represents the vehicle's forward / backward direction, called the forward / backward direction X. Y represents the vehicle's width direction, called the width direction Y. Z represents the vehicle's height direction, called the height direction Z.

[0015] As an example, the vehicle radiative cooling device of this embodiment can be applied to engine-driven vehicles, vehicles powered by secondary batteries, or vehicles powered by fuel cells.

[0016] like Figure 1 , Figure 2 As shown, the structure related to the vehicle radiant cooling device includes a temperature regulating part 10, a pillar panel 20 (equivalent to a pillar), a pillar trim 30, a space forming member 40, a roof panel 50, a roof trim 60, temperature measuring devices 70 and 80, and an airflow generator 90. These will be described in detail below.

[0017] (Temperature variation section)

[0018] The temperature fluctuation section 10 corresponds to the part to be cooled by the vehicle radiant cooling device of this embodiment. The temperature fluctuation section 10 is disposed at the front of the vehicle interior and is configured to allow the temperature to rise due to sunlight. In this embodiment, the temperature fluctuation section 10 is exemplarily described as follows: Figure 1 It has a windshield 11 and an instrument panel 12 as shown.

[0019] The windshield 11 is the glass located at the very front of the vehicle and is formed using known materials such as soda-lime glass. The instrument panel 12 is a dashboard located at the front of the vehicle, separating the engine and seats, and in this embodiment, it can be made of known materials such as acrylonitrile butadiene styrene (ABS) or polypropylene (PP). Temperature-varying parts 10, such as the lower part of the windshield 11 and the instrument panel 12, may experience temperature increases over time due to sunlight. The vehicle radiant cooling device of this embodiment, constructed as described later, can effectively suppress temperature increases in the instrument panel 12, the lower part of the windshield 11, and the like.

[0020] (Column panels, column decorative parts)

[0021] The pillar panel 20 corresponds to the portion of the pillar adjacent to the windshield 11 on the outer side of the vehicle. The pillar trim 30 is configured to also be arranged along the interior side of the pillar.

[0022] like Figure 2 As shown, the pillar panel 20 and the pillar trim 30 together form the space of the storage space forming component 40. Furthermore, the pillar trim 30 has an air intake 31 (see reference) to allow hot fluids such as high-temperature gases generated in the temperature fluctuation section 10 inside the vehicle interior to circulate in the cool air space rm on the roof side. Figure 1 ).

[0023] Air intake vents 31 are formed in the pillar trim 30 near the ends of the instrument panel 12 and windshield 11 that constitute the temperature fluctuation section 10. More than one air intake vent 31 can be provided on each of the left and right pillar trim 30 in the vehicle width direction Y. This configuration suppresses temperature rise on the driver's side and passenger side, effectively preventing temperature rise within the vehicle interior.

[0024] The materials for the column panel 20 and the column trim 30 are not particularly limited, as long as they can accommodate the component 40 within the internal space formed by the column panel 20 and the column trim 30. For example, the column panel 20 can be made of steel plate, and the column trim 30 can be made of known materials such as polypropylene.

[0025] (Space-forming component)

[0026] The space-forming component 40 is disposed between the air intake 31 and the cooling space rm and is surrounded by the column panel 20 and the column decorative piece 30, thereby forming a flow space 41 that allows fluid flowing in from the air intake 31 to circulate (see reference). Figure 2 The space-forming component 40 is arranged to extend along the length of the column panel 20 and the column decoration 30.

[0027] In this embodiment, the space-forming component 40 has a cross-section intersecting the length direction that is roughly arc-shaped, and together with the column decoration component 30, it forms a flow space 41 inside, which allows fluid from the temperature fluctuation section 10 to move towards the cold air space rm. The space-forming component 40 is configured to form the flow space 41 inside by means of welding or the like.

[0028] With this configuration, ribs or similar components are not required to ensure the rigidity of the column, thus allowing for a larger space for the flow of hot fluid from the temperature fluctuation section 10. As a result, a larger flow space 41 can be provided, reducing the pressure loss of the hot fluid (airflow) flowing from the temperature fluctuation section 10.

[0029] The shape of the space forming component 40 is only required to allow the hot fluid from the temperature changing section 10 to move from the air intake to the cold air space rm; the specific shape is not limited to the arc shape described above. The front end of the space forming component 40 is located above the dashboard 12 in the vehicle compartment and near the lower part of the windshield 11.

[0030] (Roof panel, roof trim)

[0031] The roof panel 50 is disposed on the outer side of the roof portion of the vehicle, and the roof trim piece 60 is disposed along the inner side of the roof panel 50. With this configuration, a cool air space rm is formed between the roof panel 50 and the roof trim piece 60, which is separated from the passenger compartment and cools the fluid from the air intake.

[0032] The circulation space 41 formed by the space forming component 40 and the pillar trim 30 is configured to communicate with the air conditioning space rm formed by the roof panel 50 and the roof trim 60. The rear end of the space forming component 40 is configured to face into the air conditioning space rm formed by the roof panel 50 and the roof trim 60.

[0033] The materials of the roof panel 50 and the roof trim 60 are not particularly limited, but the roof panel 50 can be made of the same material as the pillar panel 20, and the roof trim 60 can be made of the same material as the pillar trim 30.

[0034] Furthermore, the roof panel 50 can be configured to have a radiative cooling layer 51 that radiates far-infrared rays toward the outside of the vehicle. Specifically, the radiative cooling layer 51 of the roof panel 50 can be configured as a composite containing particles of resin and metal oxide. With this configuration, when hot fluid from the temperature fluctuation section 10 flows through the cool air space rm, radiative cooling can be used to move the heat of the fluid toward the outside of the vehicle.

[0035] (Temperature measuring device)

[0036] The temperature measuring device 70 is used to measure the temperature inside the vehicle compartment. The location of the temperature measuring device 70 is not particularly limited as long as it can measure the temperature inside the vehicle compartment, which is the object of measurement. However, as an example, it can be installed on the ceiling wall or floor of the vehicle compartment.

[0037] The temperature measuring device 80 is provided for measuring the temperature of the air-conditioned space rm surrounded by the roof panel 50 and the roof trim 60. The temperature measuring device 80 only needs to be able to measure the temperature of the air-conditioned space rm surrounded by the roof panel 50 and the roof trim 60. There is no particular limitation on the specific installation location, but it can be installed, for example, in the center of the air-conditioned space rm in the width direction Y and the front-rear direction X.

[0038] Additionally, temperature measuring devices 70 and 80 can use thermocouples, radiation thermometers, or glass thermometers. With this configuration, the temperature of the vehicle compartment and the air-conditioned space rm can be measured without constantly driving the airflow generator 90, thus obtaining the data needed to drive it only when necessary, as described later.

[0039] Temperature measuring devices 70 and 80 and airflow generator 90 can be controlled by a control unit located inside the vehicle. That is, the control unit is electrically connected to temperature measuring devices 70 and 80 and airflow generator 90, and can control them so that the airflow generator 90 is driven when the temperature of the temperature fluctuation section 10 measured by temperature measuring device 70 exceeds a predetermined threshold temperature.

[0040] (Airflow generator)

[0041] An airflow generator 90 is disposed within the cold air space rm, generating an airflow from the air intake 31 through the flow space 41 of the space forming component 40 toward the cold air space rm. For example... Figure 1 As shown, the airflow generator 90 can be positioned near the boundary between the circulation space 41 and the air conditioning space rm, as well as on the rear side of the air conditioning space rm.

[0042] By placing the airflow generator 90 at the rear of the vehicle's air-conditioned space rm, a pressure difference in the air (fluid) can be generated in the air-conditioned space rm, guiding the hotter fluid from the temperature fluctuation section 10 to the rear of the air-conditioned space rm. This allows for radiative cooling of the hot fluid generated in the temperature fluctuation section 10 throughout the air-conditioned space rm.

[0043] Furthermore, by placing the airflow generator 90 near the boundary between the space forming member 40 and the cold air space rm, a pressure difference in the air (fluid) can be generated in the flow space, effectively guiding the hot air generated in the temperature fluctuation section 10 towards the cold air space rm. Thus, the hot fluid generated in the temperature fluctuation section 10 can be effectively radiated and cooled.

[0044] The airflow generator 90 can be controlled by the control unit to operate when the temperature of the air-conditioned space rm, measured by the temperature sensor 80, is lower than the temperature inside the vehicle, measured by the temperature sensor 70. Thus, in summer or other conditions with high external temperatures, the airflow generator 90 suppresses the rise in temperature inside the vehicle. Conversely, in winter or other conditions with low external temperatures, by not operating the airflow generator 90, it can be effectively utilized without unintentionally causing a drop in the temperature inside the vehicle.

[0045] The airflow generator 90 can be configured to spray air (fluid) from the rear of the roof trim into the passenger compartment when the temperature of the air-conditioned space rm is lower than the temperature inside the passenger compartment. The air-conditioned space rm on the roof is separated from the passenger compartment by the roof trim 60, but an opening and closing part 61 can be provided on the roof trim 60. This opening and closing part 61 can operate in such a way that it opens when fluid flows in the air-conditioned space rm and closes when the airflow subsides.

[0046] When the temperature in the air-conditioned space is lower than the temperature inside the vehicle, the control unit activates the airflow generator 90. The airflow generated by the airflow generator 90 opens the opening / closing part 61, allowing air from the air-conditioned space rm to be expelled into the vehicle interior. This configuration, by circulating the fluid cooled in the air-conditioned space rm within the vehicle interior, lowers the temperature inside the vehicle.

[0047] The specific structure of the airflow generator 90 is not particularly limited as long as it can generate airflow from the air intake 31 through the pillar to the cold air space rm on the roof. However, as an example, it can be configured to operate a fan via a known electric motor. With this configuration, the hot air generated in the temperature fluctuation section 10 enters the cold air space rm from the air intake 31 through the flow space 41 of the space forming member 40, and is radiated to the outside of the vehicle via the radiant cooling layer 51.

[0048] Therefore, heat transfer from the temperature fluctuation unit 10 to the vehicle interior space can be effectively suppressed. Consequently, the temperature rise inside the vehicle caused by the instrument panel 12, windshield 11, and other components constituting the temperature fluctuation unit 10 can be suppressed, improving interior comfort. Thus, in this embodiment, the temperature rise inside the vehicle interior is suppressed by the airflow generator 90, rather than by the air conditioning system, thereby reducing power consumption.

[0049] Furthermore, the present invention is not limited to the embodiments described above, and various modifications can be made within the scope of the claims. In the above description, it was explained that the temperature regulating unit 10 uses an airflow generator 90 to cool the windshield 11 and the instrument panel 12, but it is not limited thereto. In addition to the above, in the location... Figure 1Air intakes are provided on the pillar trim near the rear windshield 13 and the trunk panel 14, which are prone to temperature rise due to sunlight. Furthermore, a space-forming component can be installed inside the pillar panel and pillar trim, allowing airflow generators to direct heat moving from the air intakes through the flow space formed by the pillar trim and space-forming component towards the cool air space on the roof for radiant cooling.

[0050] In addition, the following embodiments are also included within the scope of the present invention: a vehicle radiant cooling device according to technical solution 1 having the features of technical solution 2; a vehicle radiant cooling device according to technical solution 1 or 2 having the features of technical solution 3; a vehicle radiant cooling device according to any one of technical solutions 1 to 3 having the features of technical solution 4; a vehicle radiant cooling device according to any one of technical solutions 1 to 4 having the features of technical solution 5; a vehicle radiant cooling device according to any one of technical solutions 1 to 5 having the features of technical solution 6; a vehicle radiant cooling device according to any one of technical solutions 1 to 6 having the features of technical solution 7; a vehicle radiant cooling device according to technical solution 7 having the features of technical solution 8; and a vehicle radiant cooling device according to any one of technical solutions 1 to 8 having the features of technical solution 9.

[0051] Explanation of reference numerals in the attached figures

[0052] 10: Temperature Variation Section

[0053] 11: Windshield

[0054] 12: Dashboard

[0055] 20: Column panel (column)

[0056] 30: Column decorative pieces

[0057] 31: Air intake port

[0058] 40: Space forming component

[0059] 41: Circulation Space

[0060] 50: Roof panel

[0061] 51: Radiative Cooling Layer

[0062] 60: Roof trim

[0063] 70, 80: Temperature measuring instrument

[0064] 90: Airflow generator

[0065] rm: air-conditioned space

Claims

1. A radiant cooling device for vehicles, characterized in that, have: The vehicle's roof panel has a radiative cooling layer on its outer surface that radiates far-infrared rays toward the outside of the vehicle. A roof trim piece, which is disposed along the interior side of the roof panel; The air-conditioned space is the space divided by the roof panel and the roof trim. Temperature regulating unit, which is located at the front or rear of the vehicle interior, can raise the temperature due to sunlight. Pillar trim pieces are arranged along the interior side of the pillars; An air intake is disposed adjacent to the temperature-changing part in the column decoration; A space-forming component, which is disposed between the air intake and the cold air space and surrounded by the column and the column decoration, forms a flow space that allows fluid to flow in from the air intake. An airflow generator, disposed within the air-conditioned space, generates an airflow from the air intake and through the circulation space toward the air-conditioned space.

2. The vehicle radiant cooling device according to claim 1, characterized in that, The temperature-changing part is the instrument panel and the lower part of the windshield, which may become hot due to sunlight.

3. The vehicle radiant cooling device according to claim 1, characterized in that, The air intake is provided at least one on each of the left and right pillar trim pieces of the vehicle.

4. The vehicle radiant cooling device according to claim 1, characterized in that, The space-forming component forms the circulation space internally by being integrally formed with the column decoration.

5. The vehicle radiant cooling device according to claim 1, characterized in that, The airflow generator is located at the rear of the vehicle in the air-conditioned space.

6. The vehicle radiant cooling device according to claim 1, characterized in that, The airflow generator is located near the boundary between the space-forming component and the cold air space.

7. The vehicle radiant cooling device according to claim 1, characterized in that, The airflow generator is driven when the temperature in the air-conditioned space is lower than the temperature inside the vehicle.

8. The vehicle radiant cooling device according to claim 7, characterized in that, The temperature inside the vehicle is measured by a thermocouple, a radiation thermometer, or a glass thermometer.

9. The vehicle radiant cooling device according to claim 1, characterized in that, When the temperature of the air-conditioned space is lower than the temperature inside the vehicle, the airflow generator exhausts air from the rear of the roof trim into the vehicle interior.

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