JPH04314667A - Vehicle heating system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating system for a vehicle such as a train.

0002

2. Description of the Related Art A conventional heating system for a vehicle has a main body of a heater, which has a heating element disposed inside a substantially box-shaped case, fixed to the underside of a seat as shown in FIG.

A conventional vehicle heating system will be explained below with reference to FIG. FIG. 9 shows a cross-sectional view of a conventional vehicle heating device. FIG. 10 shows a view of the device from the front. In the figure, 1 is the floor of the car body, 2 is the seat, 3 is the conventional heater body, and 4 is the base made of a metal plate made of stainless steel or other material made by bending a single plate, with both ends bent into a Z shape. A mounting portion 4a is formed, and a cover mounting portion 4b is formed in the front-rear direction. Reference numeral 5 denotes a cover made of a stainless steel plate having a substantially chevron-shaped cross section, which is provided with a large number of ventilation holes 5a, and whose end portion overlaps with the cover attachment portion 4b of the base 4 and is fixed with screws 6.

Reference numeral 7 denotes a pair of side plates fixed to the base 4, which seal the space between the base 4 and the cover 5, thereby forming a box. Reference numeral 8 indicates a rod-shaped heating element consisting of a U-shaped sheathed heater, and 9 indicates a power supply wire connected to the rod-shaped heating element. 1
0 is an insulator that supports the heating element 8 and is fixed to the base 4 with screws 11. Reference numeral 12 denotes a fixing fitting, which fixes the heating element 8 to the insulator 10 using screws 13. Reference numeral 14 indicates a screw for attaching the heater main body 3 to the lower surface of the seat 2.

Next, heat transfer during heating will be explained. When the heating element 8 of the heater main body 3 is energized, normally,
The temperature of the heating element 8 is approximately 300 to 350°C. heating element 8
The radiant heat generated from the cover 5 is dissipated in the entire circumferential direction as shown by the dotted arrow in FIG. Also, most of the radiant heat is from the base 4
This is absorbed by the base 4 and cover 5 and increases the temperature, while it is reflected by the base 4 and further radiates into the room through the ventilation hole 5a of the cover 5. As shown by the solid line arrow in FIG. leaks inside.

[0006]

[Problems to be Solved by the Invention] Since the conventional vehicle heating system is constructed as described above, it has the following problems. Since there are attachment parts 4b of the cover 5 at the front and rear of the base 4, hot air inside the heater main body 3 is difficult to flow out to the indoor side. Therefore, since the air temperature inside the heater main body 3 becomes high, the temperature of the cover 5, which is easy to touch by passengers, becomes particularly high, resulting in a risk of burns or the like. In addition, in order to bring the cover 5 to a safe temperature, it is necessary to set the heating capacity of the heater body 3 to a small value, and therefore it is difficult to manufacture a large-capacity heater.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to obtain a large-capacity vehicle heating device by suppressing the temperature of the cover.

[0008]

[Means for Solving the Problems] A heating device for a vehicle according to the present invention includes a plurality of cover fixing pieces provided on a substantially flat base, and convection holes provided inside the base adjacent to the cover fixing pieces. A cover having a large number of ventilation holes is fixed to the cover fixing piece.

[0009]

[Function] The vehicle heating device according to the present invention has the minimum necessary cover fixing piece formed on the base which becomes high temperature.
Furthermore, since the base is provided with convection holes near the inside of the cover fixing piece, the amount of heat transferred from the base to the cover can be reduced. Moreover, since the hot air inside the heater body flows out from the convection holes, the air temperature inside the heater becomes lower. These two points make it possible to keep the temperature of the cover low.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. 1 to 4. In FIGS. 1 to 4, the same reference numerals as in FIGS. 9 and 10 have the same configurations, so the explanation will be omitted. 15 is a heater mounting plate fixed to the lower surface of the seat 2, 16 is the heater main body, 17 is a substantially flat base made by bending a single plate, and at both ends there is a seal between the covers to be described later. Side plate 1 for
8 are integrally formed. A plurality of L-shaped cover fixing pieces 19 are fixed to the base 17 by spot welding or the like. Further, a convection hole 17a is formed in the base 17 from the inside near the cover fixing piece 19.

Reference numeral 20 denotes a cover having a substantially chevron-shaped cross section, and is provided with a large number of ventilation holes 20a. This ventilation hole 20a is the corresponding part of the bare live part A in the heater main body 16 or the cover fixing piece 19.
The opening area is arranged to be as large as possible except for the contact portion with the side plate 18 and the joint portion with the side plate 18. The cover 20 is fixed to the cover fixing piece 19 with screws 6. At this time, the end of the cover 20 hits the cover fixing piece 19 and the base 1
A gap corresponding to the thickness of the cover fixing piece 19 is created between the holes 7 and 7. As described above, the box is constituted by the base 17, the side plates 18, and the cover 20. Reference numeral 21 indicates a screw for fixing the heater main body 16 to the mounting plate 15.

The heater main body 16 configured as described above is installed on the lower surface of the seat 2 with the base 17 facing upward. A predetermined space is set.

Next, heat transfer during heating in the first embodiment will be explained. Heating element 8 of heater main body 16
When energized, the heating element 8 typically generates about 300 to 350
heated to ℃. The radiant heat generated from the heating element 8 is radiated in the entire circumferential direction as shown by the dotted arrow in FIG. Also, most of the radiant heat is blocked by the base 17 and cover 20, but this is absorbed by the base 17 and cover 20 and increases their temperature, and is reflected by the base 17 and is absorbed by the ventilation holes of the cover 20. 20a, it will be dissipated toward the indoor side.

On the other hand, convection is caused by the cover 20 as shown by the solid arrow.
This is done through the ventilation hole 20a. Cover 2 from the bottom
0 and flows out into the room through the ventilation holes 20a at the upper end, and flows out into the lower surface of the seat 2 through the convection holes 17a provided in the base 17. In this case, the amount of convection flowing to the lower surface of the seat 2 can be set depending on the opening area of the convection hole 17a.

FIGS. 5 and 6 show a vehicle heating system according to a second embodiment of the present invention. In FIGS. 5 and 6,
Reference numeral 22 designates a base formed by bending a single plate and forming side plates 23 at both ends thereof, and 24 designates a plurality of cover fixing pieces cut and raised integrally from the inside. Reference numeral 22a indicates a convection hole, the opening area of which is larger than the size of the cover fixing piece 24, but may be set to a larger size if necessary. In the configuration of the second embodiment, since the cover fixing piece 24 is formed integrally with the base 22, the number of parts of the base 22 is reduced, and mass production workability is further improved.

Furthermore, FIG. 7 is a sectional view of a main part showing a third embodiment of the present invention, and FIG. 8 is a perspective view of a cover 26 thereof. In FIGS. 7 and 8, 26a indicates a folded portion formed inwardly on the cover 26 on a surface other than the side plate 23 and the cover fixing piece 24, and 26b indicates a large number of ventilation holes. In this embodiment, the cover 26 is strong and has a good appearance because the folded portion 26a serves as a reinforcing member against the external force shown by the arrow. Furthermore, since the cover 26 is attached to the base 22 with a slight gap, consideration can be given to minimizing heat conduction from the base 22.

[0017]

As described above, according to the present invention, a cover fixing piece is provided on a substantially flat base, and convection holes are provided from the inside adjacent to this cover fixing piece, and a large number of ventilation holes are provided. By fixing the cover, heat conduction from the high-temperature base to the cover is reduced, and the high-temperature air inside the heater body flows out from the convection holes, lowering the temperature inside the heater and increasing the temperature of the cover. It can be kept low. Therefore, it is possible to obtain a heating device with a lower cover temperature and superior safety than conventional heating devices, and also to be able to manufacture a device with a large capacity for use in cold regions.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a vehicle heating device showing a first embodiment of the present invention.

FIG. 2 is a front view of the vehicle heating device according to the first embodiment of the present invention.

FIG. 3 is a perspective view of the base of the first embodiment of the invention.

FIG. 4 is a perspective view of the heater main body according to the first embodiment of the present invention.

FIG. 5 is a sectional view of a vehicle heating device showing a second embodiment of the invention.

FIG. 6 is a perspective view of the base of the second embodiment of the invention.

FIG. 7 is a sectional view of a vehicle heating device showing a third embodiment of the present invention.

FIG. 8 is a perspective view of a cover according to a third embodiment of the invention.

FIG. 9 is a sectional view showing a conventional vehicle heating device.

FIG. 10 is a front view of a conventional vehicle heating system.

[Explanation of symbols]

2 Seat seat 8 Heating element 15 Mounting plate 16, 25　Heater body 17, 22 base 17a, 22a Convection hole 18, 23 Side plate 19, 24 Cover fixing piece 20, 26 Cover 20a Ventilation hole 26a Folded part

Claims (2)

[Claims] 1. A substantially flat base having a plurality of cover fixing pieces fixed to the lower surface thereof; a cover fixed to the fixing pieces of the cover and having a substantially chevron-shaped cross section and having a number of ventilation holes formed therein;
A heating element is held in a space inside the box formed by a pair of side plates that close both side surfaces of the cover, and a heater body is formed by forming a convection hole in a position close to the cover fixing piece of the base. , maintain a predetermined space on the underside of the seat,
A heating device for a vehicle, characterized in that the heating device is installed with the base side facing upward. 2. The plurality of cover fixing pieces are integrally formed on a substantially flat base by cutting and bending, and
2. The heating device for a vehicle according to claim 1, wherein the opening formed by cutting and bending the cover fixing piece of the base is used as a convection hole either as it is or by enlarging it to a predetermined size.