Small mobility

Abstract

To provide a small mobility that can efficiently exhaust heat by utilizing the rising air currents generated by a heat source.SOLUTION: A small mobility is covered by a cover 3 and includes at least one or more heat-generating lower heat sources 5 inside, and a duct 7 is provided from above the lower heat source 5 to communicate with the outside air on the upper surface of the cover 3, and the position of an inlet 8 of the duct 7 relative to the lower heat source 5 is set to include the center of the lower heat source 5 in the longitudinal and lateral directions, and the inlet 8 is formed in a shape that extends from the center of the lower heat source 5 along the longitudinal direction.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a compact mobility vehicle, and more particularly to a compact mobility vehicle having at least one heat source having heat generation properties inside the vehicle and covered by a cover. [Background technology]

[0002] In order to prevent overheating of the heat generated in a heat source installed inside a covered area, a technique for cooling and exhausting the heat source is known (see, for example, Patent Document 1). Note that the above-mentioned technique can also be applied to small mobility vehicles.

[0003] Patent document 1 discloses an electrical equipment storage panel that includes an air-cooled device with heat-generating electronic components stored in a storage chamber formed on the front side of a box-shaped panel (hereinafter referred to as the cover), and a duct formed on the back side of the cover.

[0004] In Patent Document 1, the pneumatic equipment includes a cylindrical equipment case extending from the front side toward the duct, heat-generating electronic components in contact with the outer peripheral surface of the equipment case, and a fan installed at the front opening of the equipment case. The duct has an inlet located above the electrical equipment installed at the bottom inside the cover, and air that has absorbed heat generated by the electrical equipment moves into the duct through the inlet, and then is exhausted to the outside of the cover from an exhaust port on the ceiling side of the cover while generating an ascending air current in the duct due to the airflow caused by the fan inside the duct. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-153166 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the device described in Patent Document 1, heat from the heat source located below rises and is transferred to the air-cooled equipment above, so a fan is required to increase the flow rate. Using a fan requires a power source, battery, control device, etc. to drive the fan, which raises concerns about increased power consumption. In addition, in battery-powered mobility vehicles, it is necessary to conserve power by using the fan as little as possible.

[0007] The present invention has been made in consideration of the above circumstances, and has as its object to provide a small mobility vehicle that can efficiently exhaust heat by utilizing an ascending air current generated by heat generated by a heat source. [Means for solving the problem]

[0008] In order to solve the above-mentioned problems, the present invention provides a compact mobility vehicle having at least one heat source enclosed by a cover, the vehicle having a duct provided above the heat source and communicating with the outside air on the upper surface of the cover, the position of an inlet of the duct relative to the heat source being set to include a center portion of the heat source in the longitudinal and lateral directions, and the inlet portion being formed in a shape extending from the center portion along the longitudinal direction. Note that in this invention, the heat source refers to a heat source that generates heat, and includes, for example, an electrical device equipped with a heat-generating electronic component such as a power semiconductor, a battery, a motor, etc.

[0009] With this configuration, the heat generated by the heat source raises the air temperature around the heat source, and the hot air gathers at the center of the heat source. Therefore, the duct inlet located at the center of the heat source can efficiently capture the rising air current. Specifically, by designing the duct inlet to extend longitudinally from the center of the heat source in both the longitudinal and lateral directions, the rising air current of the hot air gathering at the center of the heat source can be efficiently captured. Furthermore, the temperature of the upper part of the cover also rises due to solar radiation, generating a similar rising air current. By aligning the duct outlet with the upper side of the cover, where the flow velocity of the rising air current is highest at the start of the rising air current and communicates with the outside air, the suction force of the rising air current from the cover can accelerate the exhaust of the hot air. Furthermore, by separating the heat of the lower heat source from the heat sources and components located above and around the heat source, the temperature rise of the upper and surrounding heat sources and components can be suppressed. [Effects of the Invention]

[0010] According to the present invention, by configuring as described above, it is possible to efficiently exhaust heat by utilizing the rising air current generated by the heat source, and to suppress heat transfer to the heat source and components disposed above and around the heat source. [Brief explanation of the drawings]

[0011] [Figure 1] 1A is a schematic cross-sectional view of a first embodiment of a compact mobility device according to the present invention, and FIG. 1B is a schematic side cross-sectional view of FIG. 1A. [Figure 2] 1A is a schematic cross-sectional view showing a state in which the first embodiment is used, and FIG. 1B is a schematic side cross-sectional view of FIG. 1A. [Figure 3] FIG. 4 is a schematic cross-sectional view of a second embodiment of the compact mobility according to the present invention. [Figure 4] FIG. 10 is a schematic cross-sectional view showing a state in which the second embodiment is used. [Figure 5] FIG. 10 is a schematic cross-sectional view of a third embodiment of the compact mobility according to the present invention. [Figure 6] FIG. 10 is a schematic cross-sectional view showing a state in which the third embodiment is used. [Figure 7]FIG. 10 is a schematic cross-sectional view of a fourth embodiment of the compact mobility according to the present invention. [Figure 8] FIG. 10 is a schematic cross-sectional view showing a state in which the fourth embodiment is used. DETAILED DESCRIPTION OF THE INVENTION

[0012] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. Here, we will explain the main parts of a small mobility vehicle equipped with two heat-generating heat sources, omitting the drive unit of the mobility vehicle.

[0013] First Embodiment As shown in Figure 1, the compact mobility 1 of the first embodiment of the present invention is provided with a square box-shaped cover 3 covering the top of a plate-shaped base 2, and is equipped with a heat source 5 (hereinafter referred to as the lower heat source 5) having heat generation properties and installed in the center of the plate-shaped base 2, a heat source 6 (hereinafter referred to as the upper heat source 6) installed on the cover side wall 3a on the upper side within the cover, and a duct 7 communicating with the outside air from above the lower heat source 5 via an exhaust port 4 provided in the ceiling wall 3b on the upper side of the cover 3.

[0014] The inlet portion 8 of the duct 7 is set at a position including the center of the lower heat source 5 in the longitudinal and lateral directions. The inlet portion 8 of the duct 7 is formed in a shape that extends along the longitudinal direction from the center of the lower heat source 5. In this case, as shown in FIG. 1(b), the duct 7 is composed of a rectangular tubular outlet portion 9 that communicates with the exhaust port 4 provided in the ceiling wall 3b of the cover 3, and the inlet portion 8 that is made up of an inclined piece 8a that extends downward and along the longitudinal direction from the lower end of the outlet portion 9, and a hanging piece 8b that hangs down from the lower end of the inclined piece 8a.

[0015] As described above, by setting the inlet portion 8 of the duct 7 at a position including the center of the lower heat source 5 in the longitudinal and lateral directions and forming it into a shape that extends from the center of the lower heat source 5 along the longitudinal direction, the heat generated by the lower heat source 5 increases the temperature of the air around the lower heat source, and the rising air current of hot air that has gathered in the center of the lower heat source 5 can be efficiently supplemented.

[0016] Furthermore, by locating the outlet 9 of the duct 7 at a position that communicates with the outside air via the exhaust port 4 provided in the ceiling wall 3b on the upper surface of the cover 3, the outlet of the duct 7 can be aligned with the position on the upper surface of the cover 3 that communicates with the outside air, where the speed of the rising air current that starts when the temperature of the upper part of the cover 3 rises due to solar radiation is at its highest. This allows the suction force of the rising air current of the cover 3 to accelerate the exhaust of hot air.

[0017] Next, the usage state of the first embodiment will be described with reference to FIG. When the temperature of the air around the lower heat source 5 rises due to the heat generated by the lower heat source 5, the air is warmed and its volume expands, causing it to become lighter than the air around the lower heat source 5, generating an updraft. At this time, the hot air gathers at the center of the lower heat source 5, and the updraft F of the heat source draws in the surrounding air flow Fa and is captured inside the duct 7 from the inlet 8 of the duct 7. The updraft F of the heat source that flows inside the duct 7 is exhausted from the exhaust port 4 provided in the ceiling wall 3b of the cover 3, with which the outlet 9 communicates.

[0018] When the temperature rises due to solar radiation above the cover 3, an updraft F is also generated. Since the outlet 9 of the duct 7 is located at the point where the flow velocity of this updraft F is the highest at the beginning, the suction force of the updraft F from the cover 3 draws in the surrounding air flow Fa, accelerating the exhaust of the hot air.

[0019] Furthermore, since the rising air current F of the heat source is completely captured by the duct 7, the heat of the lower heat source 5 can be separated from the upper heat source 6 placed above the lower heat source 5, thereby suppressing the temperature rise of the upper heat source 6.

[0020] Second Embodiment 3, in the second embodiment, the upper heat source 6 is disposed above the center of the lower heat source 5, and the duct 7A is provided in a position that does not interfere with the upper heat source 6. Note that in the second embodiment, other parts are the same as in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof will be omitted.

[0021] In the second embodiment, the inlet portion 8A of the duct 7A is located at a position including the center of the lower heat source 5 in both the longitudinal and lateral directions, and the outlet portion 9A is connected to the exhaust port 4 provided in the ceiling wall 3b of the cover 3, similar to the first embodiment. To avoid interference with the upper heat source 6, the inlet portion 8A of the duct 7A is formed with an upward slope toward the outside of the upper heat source 6, and the outlet portion 9A is formed with a downward slope toward the outside of the upper heat source 6. The upper end of the inlet portion 8A and the lower end of the outlet portion 9A are connected by a straight connecting portion 7a. In this case, the straight connecting portion 7a is formed with a cross-sectional area slightly larger than the cross-sectional areas of the inlet portion 8A and the outlet portion 9A. Although not shown, the inlet portion 8A is formed with a shape that extends longitudinally from the center of the lower heat source 5, as in the first embodiment.

[0022] 4, in the second embodiment, when the heat generated by the lower heat source 5 causes the temperature of the air around the lower heat source 5 to rise, an ascending air current is generated as described above. At this time, the hot air gathers at the center of the lower heat source 5, and the ascending air current F of the heat source entrains the surrounding air flow Fa and is captured inside the duct 7A from the inlet 8A of the duct 7. The ascending air current F of the heat source that flows through the duct 7A from the inlet 8A via the straight communication portion 7a is exhausted from the exhaust port 4 provided in the ceiling wall 3b of the cover 3, which communicates with the outlet 9A.

[0023] In the second embodiment, in order to avoid interference with the upper heat source 6, the inlet portion 8A of the duct 7A is formed with an upward slope toward the outside of the upper heat source 6, and the outlet portion 9A is formed with a downward slope toward the outside of the upper heat source 6, and the upper end of the inlet portion 8A and the lower end of the outlet portion 9A are connected by a straight communication portion 7a. Therefore, the heat of the lower heat source 5 can be separated from the upper heat source 6, which is placed above the lower heat source 5, and the temperature rise of the upper heat source 6 can be suppressed.

[0024] In the second embodiment, as in the first embodiment, an increase in the temperature of the cover 3 due to solar radiation generates an updraft F. Since the outlet 9A of the duct 7A is located at the location where the flow velocity of this updraft F is highest at the start, the suction force of the updraft F of the cover 3 draws in the surrounding air flow Fa, accelerating the exhaust of the hot air.

[0025] <Third embodiment> In the third embodiment, the ceiling wall 30B of the cover 30 is formed in a pent roof shape. 5, in the third embodiment, an exhaust port 4 is formed in the upper part of the ceiling wall 30B, and an outlet 9B of the duct 7B is provided in the vicinity of the exhaust port 4 and communicates with the outside air via the exhaust port 4. Note that in the third embodiment, other parts are the same as in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof will be omitted.

[0026] 6, in the third embodiment, when the heat generated by the lower heat source 5 causes the temperature of the air around the lower heat source 5 to rise, an ascending air current is generated as described above. At this time, the hot air gathers at the center of the lower heat source 5, and the ascending air current F of the heat source entrains the surrounding air flow Fa and is captured inside the duct 7B from the inlet 8 of the duct 7. The ascending air current F of the heat source that flows through the duct 7B from the inlet 8 is exhausted from the exhaust port 4 provided in the pent roof-type ceiling wall 30B of the cover 30, which communicates with the outlet 9B.

[0027] In the third embodiment, as in the first embodiment, an increase in the temperature of the cover 30 due to solar radiation generates an updraft F. Since the outlet 9B of the duct 7B is located at the location where the flow velocity of this updraft F is highest at the start, the suction force of the updraft F of the cover 30 draws in the surrounding air flow Fa, accelerating the exhaust of the hot air.

[0028] In the third embodiment, the rising air current F of the heat source is also completely captured by the duct 7B, so that the heat of the lower heat source 5 can be separated from the upper heat source 6 placed above the lower heat source 5, thereby suppressing the temperature rise of the upper heat source 6.

[0029] <Fourth embodiment> 7, the fourth embodiment is a case where the ceiling wall 30C of the cover 30 is formed in a modified pent roof shape, and the exhaust port 4 is provided at an arbitrary position on the ceiling wall 30C. In the fourth embodiment, the outlet portion 9C of the duct 7C is provided in the vicinity of the exhaust port 4 and communicates with the outside air via the exhaust port 4, as in the third embodiment. Note that in the fourth embodiment, the other parts are the same as in the first embodiment, so the same parts are designated by the same reference numerals and description thereof will be omitted.

[0030] 8, in the fourth embodiment, when the heat generated by the lower heat source 5 causes the temperature of the air around the lower heat source 5 to rise, an ascending air current is generated as described above. At this time, the hot air gathers at the center of the lower heat source 5, and the ascending air current F of the heat source entrains the surrounding air flow Fa and is captured inside the duct 7C from the inlet 8 of the duct 7C. The ascending air current F of the heat source that flows through the duct 7C from the inlet 8 is exhausted from the exhaust port 4 provided in the pent roof-type ceiling wall 30C of the cover 30, which communicates with the outlet 9C.

[0031] In the fourth embodiment, as in the first embodiment, an increase in the temperature of the cover 30 due to solar radiation generates an updraft F. Since the outlet 9C of the duct 7C is located at the location where the flow velocity of this updraft F is highest at the start, the suction force of the updraft F of the cover 30 draws in the surrounding air flow Fa, accelerating the exhaust of the hot air.

[0032] In the fourth embodiment, the rising air current F of the heat source is also completely captured by the duct 7C, so that the heat of the lower heat source 5 can be separated from the upper heat source 6 located above the lower heat source 5, thereby suppressing the temperature rise of the upper heat source 6.

[0033] <Other embodiments> In the above embodiment, a compact mobility device equipped with two heat-generating heat sources, a lower heat source 5 and an upper heat source 6, has been described, but the present invention is not limited to this. The present invention may be of any configuration as long as it is equipped with at least one heat source that generates heat, for example, the lower heat source 5, and the inlet portion 8 (8A) of the duct 7 (7A, 7B, 7C) is formed in a shape that extends longitudinally from the center of the lower heat source 5. [Explanation of symbols]

[0034] 1. Small mobility 3,30 Cover 3b,30B,30C Ceiling wall 4 exhaust port 5 Lower heat source 6 Upper heat source 7, 7A, 7B, 7C ducts 8,8A entrance section 9,9A,9B,9C Exit part F. Updraft Fa Air Flow

Claims

[Claim 1] A small mobility vehicle having at least one heat source having heat generation properties inside the vehicle and covered by a cover, a duct is provided that communicates from above the heat source to the outside air on the upper surface side of the cover, a position of the inlet of the duct relative to the heat source is set to include a central portion of the heat source in both a longitudinal direction and a lateral direction; The inlet portion is formed in a shape extending from the central portion along the longitudinal direction. Compact mobility characterized by:

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