JPS59184009A - Radiation warmer for car - Google Patents

Abstract

PURPOSE:To achieve warming effect quickly immediately after start while to reduce noise by arranging a heater, heater holder and case while separating thermally by predetermined distance except the supporting section. CONSTITUTION:Contacting sections 6-8 for supporting a heater body 4 comprised of an insulative ceramic printed with a resistive heating film 4c, thin ceramic substrate and black coating, a heater supporter 3, case 2 and rear cover 5 are minimized. Then a space 12 is formed between each section 6-8 and isolates thermally. Consequently it is never influenced by heat transmission while since the space 12 is communicating to the outside, warmed air will flow through natural convection. Consequently heat transmission to the outer face of case 1 is suppressed to reduce size, to improve efficiency and to reduce noise through reduction of air flow.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicular heating system, and more particularly to a radiant heating system that has been improved so that a heating effect can be quickly obtained immediately after startup. It is designed to maximize its effectiveness when carrying out the following.

Conventional vehicle heating systems are hot water type heating systems that utilize the engine's cooling system, which uses the heat of the engine to heat the cooling water. no effect).

Therefore, a rapid heating type heating device is desired. However, hot air heaters with a built-in heating element (chrome wire, PTC, etc.) heat the air once and then apply it to an object to create a sensation of warmth, resulting in poor heating efficiency. Moreover, since it requires a certain amount of air volume, it is accompanied by noise from fans, etc.

The present invention provides a radiant rapid heating system for a vehicle that eliminates the above-mentioned drawbacks.

The present invention will be explained below with reference to Examples. FIG. 1G shows an external view of the device of the present invention, and FIG. 2 shows a sectional view thereof. In Figures 1 and 2, 1 is a case made of heat-resistant resin, 1a is a mirror surface part made of metal coating, 2 is a metal wire frame, and 3 is a holder with a U-shaped cross section, which is made of a heat insulating material such as ceramic, asbestos, etc. The tapered surface of the open portion is a mirror surface portion 3a made of metal coach ink. 4 is a heating element, 4
a+;! The IJ-domain terminal 5 is the back cover of the case 1 and is made of heat-resistant resin, and its inner surface is coated with a mirror surface 5a of metal. 6 is a heating element attachment, 6a is a vapor-shaped engine link,
Reference numeral 7.8 is a collar, and this fixture 6 and collar number 7.8 are made of the same material as the above-mentioned holder 3. 9,10゜1
3 is a screw, 11 is a lead wire, lla+ connection holder, and 12 is a space. The above-mentioned mirror parts 1a and 3a
, 5a's metal coachworks are made of chrome plated or thin sheets of aluminum foil or steering links.

The detailed structure of the heating element 4 is shown in FIG. In FIG. 3, 4b is a substrate made of an electrically insulating ceramic material such as cordierite or alumina, on which a resistance heating thin film 4C of molybdenum or tungsten is printed. Moreover, the 1-node terminal 4a is electrically connected to the thin film 4C by metallization processing. 4d is a ceramic substrate that protects the thin film 4C from oxidation etc. and increases the area of the high temperature part, and is made of the same lamic material as the substrate 4b, but has a smaller thickness than the substrate 4b. It is thinner. Both substrates 4b and 4d are simultaneously fired so as to be in close contact with each other.

4e is P which is a mixture of crystallized glass and manganese dioxide,
The coating is a thin film and is baked onto the substrate 4d. The color becomes black due to the contamination of mankan dioxide. 4f is a hole for fixing a heating element, and is a board 4d.

It is provided over 4b. 8. The lead terminal 4a and the lead wire 11 are firmly connected by a connection holder 11a made of a conductive material.

FIG. 4 shows an example of how it is installed on a vehicle. As shown in FIG. 4, a case l of a heat generating device is embedded in the dash hood 32 so as to be located next to the steering link 31 of the driver's seat, and is designed to warm the driver's hands and face. In addition,
The heat generating device is oriented slightly toward the driver. By the way, the fixing method is to fix the case 1 to the surface of the dash board with screws 22. A cover 23 covers the mounting portion. In this case, the case 1 is integrally provided with the mounting plate 1b.

The present invention is an infrared radiant heating device using the radiant heating element 4 described above. By the way, for in-vehicle use, the case 1 must be small in size and must not be heated to high temperatures from the outer surface of the case 1. In the case of a radiant heating device, the heating element 4 becomes high in temperature, so the following measures are taken as heat insulation measures in case 1.

That is, by applying metal coating mirror parts 3a and 5a to the inner surfaces of the case 2, back cover 5, and holder 3, the heating element 4
This suppresses the effects of radiant heat emitted inside the device.

Furthermore, as shown in FIG.
, collar 7.8), in other words, the influence of heat conduction is suppressed by keeping the contact area of each part small. Furthermore, since the space 12 created by the above communicates with the outside, air heated by heat transfer flows to the outside by natural convection.

Therefore, heat transfer to the outer surface of the case 1 can be suppressed, and the size of the device itself can be reduced.

On the other hand, in order to increase the heating rate of the heating element 4 to quickly heat the side facing the irradiation object, the thickness of the ceramic substrate 4d is made thinner.In other words, in FIG. 4b to increase the temperature increase rate on the substrate 4d side,
Furthermore, the black coating thin film 4e makes it easier for radiant energy to be emitted. This means that, as shown in FIG. 5, most of the radiant energy is radiated from the black coating thin film 4e side of the heating element 4, and in conjunction with the above-mentioned heat insulation measures, the radiant energy is smaller than the consumed energy. The ratio increases, resulting in a heating device with high energy consumption efficiency. Note that the temperature distribution of the heating element 4 is as follows:
The upper surface of the resistive thin film 4C may be slightly different depending on the pattern of the resistive thin film 4C, but the upper surface of the resistive thin film 4C is almost uniform, for example, as shown in FIG.

Since the heating element 4 is flat, the irradiation distribution on the target object is isodirectional radiation, and as shown in FIG.
When faced with this, the center of the object has a high irradiation rate, and as it goes to the periphery, it gradually decreases, giving a pleasant sense of warmth.

As described above, the heating device of the present invention can provide a fast-heating radiant heating device that is small, energy efficient, and quiet.

In addition, in FIG. 3, although the substrates 4b and 4d may have the same thickness, the heating speed and energy efficiency will deteriorate somewhat.

FIG. 8 shows a second embodiment of the invention. Basically, it is similar to the first embodiment, but in this embodiment, a plurality of holes 31 are provided in the upper and lower parts of the case 1 to speed up natural convection and improve heat transfer to the case 1. is even more pressing. Further, the heating element 4 is fixed to the holder 3 via the fixture 6 with a ceramic adhesive, and the cushion ring 6a is
The screw 9 and the mounting hole 4f for the heating element 4 are eliminated.

Furthermore, when mounted on a vehicle, the aforementioned mounting plate 22 and cover 23 are also provided with holes to improve air circulation.

FIG. 9 shows a third embodiment of the present invention. In the case of this embodiment, a cotton-like heat insulating material 41 such as Kaoru is inserted between the holder 3, the case 1, and the back cover 5 to forcibly prevent heat transfer to the case 1 and the back cover 5 by convection and radiation. Preventing. In this case, the metal-coated mirror parts 1a and 5 on the inner surfaces of the case 1 and the back cover
a may be omitted. Of course, the effects of radiation can be suppressed by having one.

A fourth embodiment of the present invention is shown in the ffllo diagram. This eliminates the ceramic substrate 4d of the heating element 4 in Fig. 3, and directly coats the resistive thin film 4C with black coating F,
-t- has been applied. As a result, it is possible to further improve the heating rate, and the heat is more easily transmitted to the thin black coating B94 e side, so that the energy consumption efficiency can be further improved.

Also, the pattern of the resistive thin film 4C is somewhat different from that shown in Figure 3, but in this case there are many thin lines that are parallel to each other, so even if one of them is broken, other lines will be affected. It is more reliable because it is alive. Note that the lead terminal 4a is a part of the resistive thin film 4C. Furthermore, metallization is applied on top of this terminal 4a, resulting in resistance! The film 4C may be protected.

In the present invention, the mounting location is shown as being inside the dash board as an example, but it goes without saying that it may be mounted anywhere, such as on the top or bottom of the dash board. Also,
Instead of the black coating thin film 4e, radiation can be promoted by coating crystallized glass with a mixture of rare earth elements such as lanthanum and cesium.

As described in detail above, the present invention has the excellent effect of being able to provide a compact radiant heating device that is energy efficient, quiet, and heats up quickly.

[Brief explanation of drawings]

1 is a perspective view showing a first embodiment of the present invention, FIG. 2 is a partial sectional view of FIG. 1, FIG. 3 is a partially broken perspective view showing details of the heating element in FIG. 2, and FIG. Figure fa), (b), (
C) is a diagram for explaining the installed state of the device in Figure 1, and Figure 4 (al) is a schematic diagram showing the relationship with the vehicle;
) is a cross-sectional view showing the state installed inside the dash board,
Figure 4 (C1 is a sectional view showing details of the bone removal structure in Figure 4 (bl), Figure 5 is a schematic diagram of a heating element used to explain the present invention, Figure 6 fa), (b) and 7. Figure (ai, (bl
8 and 9 are partial sectional views showing the second and third embodiments of the present invention, respectively, and FIG. 10 is a characteristic diagram for explaining the operation of the present invention. FIG. DESCRIPTION OF SYMBOLS 1... Case, 3... Heating element holder, 4... Heating element, 4, b, 4. d... is a lamic board, 4C...
Resistance heating thin film, 4e...black coating thin film, la
, 3a...mirror surface part, 6.7...support part with collar,
12...Space, 31...Hole, 41...Insulating material. Representative Patent Attorney Takashi Okabe 10 Negative-2 Prisoner 12 1a color 381゜a... 1 Fig. 3 1 Fig. 4 + al J] tbl
+C1 Fig. 5 4e 4'd Fig. 6 (a (b) ==--4C d a' Fig. 8

Claims (1)

[Claims] (1) A radiant heating element, a heating element holder attached to the heating element via a thermally insulating support, and a thermally insulating support attached to the holder so as to surround the holder. The heating element and the holding body are separated by a predetermined distance from each other in terms of thermal insulation except for the supporting part, and the heating element and the holding body are spaced apart from each other by a predetermined distance between the case and the holding body. A radiant heating device for a vehicle that is separated by a predetermined distance in terms of thermal insulation except for the support portion. (2) A patent in which a metal thin film with high reflectivity is formed on the inner surface of the heating element holder and the inner surface of the case. Radiant heating device for a vehicle as set forth in claim 1. (3) A vehicle as set forth in claim 1 or 2, wherein holes through which air circulates are formed in the vertical surface of the case. Radiant heating device. (4) A linear heat insulating material is filled in a space between the heating element holder and the case, which is the predetermined separation ratio. Radiant heating device for vehicles. (5) The heating element includes a first electrically insulating ceramic substrate, a resistance heating film formed on the surface of the first electrically insulating ceramic substrate, and a resistance heating film formed on the thin film. A radiant heating device for a vehicle according to claim 1, further comprising: a second ceramic base having a thin plate thickness; and (6) a black coating on the second ceramic base to increase emissivity. The radiant heating device for a vehicle according to claim 5, in which a thin film is formed. (7) The heating element includes a ceramic base, a resistance heating thin film on which a surface of the ceramic base is formed, and a resistance heating thin film formed on the surface of the ceramic base. A radiant heating device for a vehicle according to claim 1, comprising a black coating thin film that increases emissivity.