JPH0373782B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a panel heater that is installed, for example, in a U-shape under a desk to heat the feet and the like.

[Background Art] In the case of a panel heater in which a plurality of heating elements each having a heating element arranged therein are connected in a bendable manner,
Since the heating elements are unfolded into a U-shape during use, and unfolded into a plate shape or folded over each other when stored, the connecting portions between the heating elements are easily damaged. Conventionally, in order to prevent cracks from occurring in the connection between heating elements due to repeated use, a panel heater was developed in which an elastic cylinder was placed in the connection part to connect the heating elements so that they could be folded over each other. It is provided in publications such as Publication No. 11080. Here, as shown in FIGS. 5 and 6, a planar heating element 9 and a frame 10 are arranged inside the protective cover 8, and the side pieces 11 of the frame 10 are passed through the elastic cylinder 12. bendably connects adjacent heating elements 9, 9 to each other,
At the same time, the cylindrical body 12 prevents the heating element 9 from being forcibly bent, and eliminates concentrated stress in the connecting portion 7, thereby preventing the occurrence of cracks and the like.

However, with this conventional structure, as described above, the structure is complicated and it takes time and effort to manufacture the panel heater, and the load of the heating elements 9, 9 is applied to the elastic cylinder 12 portion. However, it had the disadvantage that it was not strong enough.

[Object of the Invention] The present invention has been made in view of the above points, and an object of the present invention is to provide a panel heater that can firmly connect heating elements to each other and also has good productivity. be.

[Disclosure of the Invention] That is, the panel heater according to the present invention includes a plurality of heat generating elements 1, 1, 1 formed in a thin plate shape.
A single heat insulating sheet 2 is laminated on the entire back surface of the heat insulating element 1 across the adjacent heat generating elements 1, and a back sheet 3 is laminated on the entire back surface of the heat insulating sheet 2, and A one-piece heat dissipation sheet 4 is laminated on the entire surface of the heat dissipation sheet 4 over the matching heat generation elements 1..., a top sheet 5 is laminated on the entire surface of the heat dissipation sheet 4, and the front and back sides of the heat dissipation elements 1 are laminated. Heat generating elements 15 and 1 are formed by the heat insulating sheet 2, back sheet 3, heat dissipation sheet 4 and top sheet 5 laminated on the
5, 15, and the back sheet 3, heat insulating sheet 2, heat dissipation sheet 4, and top sheet 5 are pressed together at the bottom part 6 between the heating elements 1 constituting each heating element 15. A thin connection part 7 is formed between the body 15 and the surface of the bottom part 6, and each heating element 15 is connected in a bendable manner at the position of the connection part 7. and
A top sheet 5 crimped onto the front and back surfaces of the heating element 1;
By crimping the heat dissipating sheet 4, the heat insulating sheet 2, and the back sheet 3 together at the connecting portion 7, it is possible to firmly connect the adjacent heating elements 15, 15, and the above purpose is achieved by eliminating the need for a hinge or the like. This has been achieved.

The present invention will be described in detail below based on examples. A plurality of planar heating elements 1 (three in this embodiment) are arranged in parallel with a space between them, which are formed by bending a heater wire in a zigzag shape or by printing foil or the like. As shown in FIGS. 2 and 3, a single heat insulating sheet 2 made of crosslinkable polyethylene foam or the like is laminated over the entire surface of the back side of each adjacent heating element 1, 1, 1. Furthermore, insulation sheet 2
A one-piece back sheet 3 made of polyester needle felt or the like is laminated on the entire back side. An adhesive sheet 13 made of polyethylene or the like is interposed between the heating element 1 and the heat insulating sheet 2, and between the heat insulating sheet 2 and the back sheet 3. = Immediately and firmly attached.
A single heat dissipation sheet 4 made of a galvanized iron plate or the like is laminated over the entire surface side of each adjacent heating element 1, 1, 1, and a vinyl chloride resin sheet or the like is laminated on the surface side of the heat dissipation sheet 4. A topsheet 5 formed of the following is laminated. Also here, heating element 1,
The heat dissipation sheet 4 and the top sheet 5 are closely and tightly adhered to each other by adhesive sheets 13, respectively. A connecting portion 7 is formed between the adjacent heating elements 1 in the connecting portion 6 in which the back sheet 3, the heat insulating sheet 2, the heat dissipating sheet 4, and the top sheet 5 are crushed from the front side and pressed together with the adhesive sheet 13. has been done. Here, the heat insulating sheet 2 is made of a material such as a cross-linked polyethylene foam that melts at a temperature higher than the heat generation temperature of the heat generating element 1 during use, and includes a top sheet 5, a heat dissipating sheet 4, a heat generating element 1, and a heat insulating sheet. When bonding the sheet 2, the back sheet 3, and the adhesive sheet 13 inserted between each sheet by heating and applying pressure, the space between the heating elements 1 and 1 is particularly strongly pressed from the front side to prevent pressure. The back sheet 3 is in a crushed state at the middle part 6,
The heat insulating sheet 2, the heat dissipating sheet 4, and the top sheet 5 are pressed together, and a thin connecting portion 7 with a recess formed on the surface side of the bottom portion 6 is formed between each heating element 15. Therefore, the heat generating element 1 can be bent at this thin connecting portion 7, and the top sheet 5, heat dissipation sheet 4, adhesive sheet 13, heat insulating sheet 2, and back sheet 3 are continuous from the front and back surfaces of the heat generating element 1. state, the connection part 7
There is no decrease in strength even in the above conditions.

In this way, heat insulating sheet 2 is attached to heat generating element 1,
The back sheet 3, heat dissipation sheet 4, and top sheet 5 are each densely laminated to form a heating element 15. Adjacent heating elements 15, 15 are bendably connected at a connecting portion 7 to form a panel heater A. is configured. The corner of panel heater A has a
As shown in the figures and FIG. 2, corner reinforcing members 14 having a U-shaped cross section are attached to protect the corners of the panel heater A. Also,
A cord lead-out portion 16 is provided on the lower outer surface of the heating element 15 on one side of the panel heater A, and a power cord 17 is electrically connected to the heating element 1 inside the panel heater A. Further, as shown in FIG. 4, the heating elements 1 of each heating element 15 are connected by heater wires 19 at the connecting portion 7. As shown in FIG. Further, on the inner surface of the corner reinforcing material 14 attached to the upper corner of the panel heater A, a switch operating section 18 for switching the power supply to the heating element 1 is provided.

Therefore, the panel heater A, which is formed so as to be foldable as described above, is installed in a U-shape under a desk, for example, and the foot part can be modified by putting the foot inside the panel heater A. It is something that can be heated. Further, when not in use, it can be opened to form a plate-like shape as shown in FIG. 4, or each heating element 15 can be folded up for easy storage. Here, since the connecting portion 7 is made up of continuous sheets covering the front and back surfaces of the heating element 1, it is strong and can strongly connect the adjacent heating elements 15, 15. Even if the panel heater A is repeatedly bent at the connecting portion 7, no cracks or the like will occur. Therefore, since the strength of the connecting portion 7 is strengthened, a special hinge as in the conventional case is not required.

Furthermore, each sheet is attached by an adhesive sheet 13.
Since the sheets are bonded closely together, no air layer is formed between the sheets, and no rising air currents of heated air layers are generated inside the panel heater A, keeping the upper part of the panel heater A warm and the lower part warm. It does not cause a temperature distribution such that the temperature is cold,
Heat can be radiated uniformly from the surface side of the panel heater A, and the strength of the board-shaped panel heater A can be increased. Moreover, by using a flexible resin such as foamed polyethylene as the heat insulating sheet 2, a temperature difference between the front side and the back side of the panel heater A will not occur, and the temperature difference between the panel heater A and the back side due to the temperature difference will not occur. It is also possible to prevent warpage and the like.

[Effects of the Invention] As described above, the present invention arranges a plurality of heat generating elements in parallel with a space between them, and laminates a single heat insulating sheet and a back sheet on the entire back side of each heat generating element. A heat dissipation sheet and a top sheet are laminated on the entire surface side of the , and a back sheet, a heat insulating sheet and a heat dissipation sheet are laminated in the area between each heating element.
The top sheet is crimped to form a thin connecting part with a recess formed on the surface side between each heating element, and each adjacent heating element is connected in a bendable manner at the connecting part. Since the connection part is made up of continuous sheets that cover the front and back surfaces of the heating element, the strength of the connection part of the panel heater is strengthened, and repeated use will prevent cracks in the connection part. It does not cause any heat generation, and it allows strong continuity between adjacent heating elements, and there is no need to install special hinges like in the past, which simplifies the structure and improves the productivity of panel heaters. There are advantages to being able to do so.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a panel heater according to an embodiment of the present invention, Fig. 2 is a sectional view of the same as above, Fig. 3 is a sectional view of essential parts of the same as above, and Fig. 4 is a partially cutaway front view of the panel heater as above. , Fig. 5 is a partially cutaway front view of the conventional example, and Fig. 6 is a partially cutaway front view of the conventional example.
The figure is a sectional view of the main parts same as above. 1 is a heating element, 2 is a heat insulating sheet, 3 is a back sheet, 4 is a heat dissipation sheet, 5 is a top sheet, 6 is a gap
7 is a connecting portion, 15 is a heating element, and A is a panel heater.

Claims (1)

[Claims] 1. A plurality of heating elements formed in a thin plate shape are arranged side by side with a space between them, and a single heat insulating sheet is laminated on the entire back surface of the heating element across adjacent heating elements,
A back sheet is laminated on the entire back surface of this heat insulating sheet, a single heat dissipation sheet is laminated on the entire surface of the heat emitting element across adjacent heat generating elements, a top sheet is laminated on the entire surface of the heat dissipation sheet, and the The heat insulating sheet, the back sheet, the heat dissipation sheet, and the top sheet laminated on the front and back sides form a heating element, and the back sheet and the heat insulating sheet are placed between the heating elements that make up each heating element. Then, the heat dissipation sheet and the top sheet are crimped to form a thin connecting part in which a recess is formed on the surface side of the space between each heating element, and each heating element is connected so as to be bendable at the position of the connecting part. A panel heater characterized by comprising: 2. The panel heater according to claim 1, wherein the heat insulating sheet is made of a material that melts at a higher temperature than the heat generation temperature of the heating element, and the heat insulating sheet is welded by heating at the connecting portion. 3. The panel heater according to claim 1 or 2, wherein the heat dissipation sheet, the heating element, and the heat insulating sheet are closely bonded to each other with an adhesive.