JPS6233222A - Panel heater - Google Patents

Abstract

PURPOSE:To provide a panel heater which can strongly connect several heater elements and has improved productivity by a method wherein a plurality of heater elements are arranged side-by-side; a thermal insulation sheet and a rear sheet are piled at the rear surface, and a radiation sheet and a surface sheet at the front surface; a connection part having each of the sheets closely contacted to each other is formed at a clearance between the heater elements; and the adjoining heater elements are connected to each other in such a way as to be bent. CONSTITUTION:A rear sheet 3, thermal insulation sheet 2, radiation sheet 4 and surface sheet 5 are crashed at their front surfaces and closely contacted to the clearance part 7 between the adjoining heater elements 1 with adhering sheets 13 to form a connector part 7. The thermal insulation sheet 2 is formed of such a material as cross-linked foam polyethylene which is melted at a temperature higher than the heating temperature found in use of the heat-generating element 1. The surface sheet 5, radiation sheet 4, heater element 1, thermal insulation sheet 2, rear sheet 3' and adhering sheet 13 inserted between respective sheets are heated and pressed to adhere them to each other and in this case the clearance between the heater elements 1 and 1 is forcedly pressed at the front surface thereof, crashed at the clearance part 6, resulting in forming a connection part 7 between the heater elements 1 and 1.

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] A panel heater in which a plurality of heat generating elements each having a heat generating element arranged therein are foldably connected can be unfolded into a U-shape when in use, unfolded into a plate shape when stored, or Since the heating elements are stacked one on top of the other, the connecting parts between the heating elements are easily damaged. Conventionally, in order to prevent cracks from occurring in the joints between heating elements due to repeated use, panel heaters have been developed since 1973, in which elastic cylinders are disposed at the joints and the heating elements can be folded over and connected to each other. It is provided in, for example, Japanese Patent No. 11080. Here, as shown in the tlSS diagram and FIG.
and a frame 10, and by passing the side pieces 11 of the frame 10 into the elastic cylindrical body 12, the adjacent heating elements 9, 9 are connected in a bendable manner, and at the same time, the cylindrical body 12 allows This prevents the heating element 9 from being bent during the bending process, 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, in the panel heater according to the present invention, a plurality of heating elements 1, 1.1 are arranged side by side with gaps in between, and a back sheet 3 is placed on the back side of each heating element 1 via a heat insulating sheet 2. At the same time, a top sheet 5 is laminated over the entire surface of the heating element 1 via a heat dissipation sheet 4, and the back sheet 3 is placed in the gap 6 of each heating element 1.1.1. , the heat insulating sheet 2, the heat dissipating sheet 4, and the top sheet 5 form a connection part 7 in close contact with each other, and the heat insulating sheet 2, the back sheet 3, the heat dissipating sheet 4, and the top sheet 5 are laminated on the heating element 1, respectively. The VF feature is that the heating elements 15 are connected in a bendable manner at the connecting portion 7, and the top sheet 5, the heat dissipation sheet 4, the heat insulation sheet 2, and the back surface are in close contact with the front and back surfaces of the heating element 1. By bringing the sheet 3 into close contact with the connecting portion 7, the heating element 15.15 can be firmly attached.
The above object is achieved by making it possible to connect the parts and by eliminating the need for hinges or the like.

The present invention will be described in detail below based on examples. A plurality of planar heating elements 1 (in this embodiment, three) 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 heat insulating sheet 2 made of crosslinkable foamed polyethylene or the like is placed over the entire surface of the back side of each heating element 1. A back sheet 3 made of polyester needle felt or the like is further laminated on the back side of the heat insulating sheet 2. An adhesive sheet 13 such as polyethylene 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, and the heat generating element 1, the heat insulating sheet 2, and the back sheet 3 are welded together without any gaps. Moreover, it is firmly attached. A heat dissipation sheet 4 made of a galvanized iron plate or the like is laminated over the entire surface of the heating element 1.
A top sheet 5 made of a vinyl chloride resin sheet or the like is laminated on the front side of the heat dissipation sheet 4. Also here, the heating element 1, the heat dissipation sheet 4, and the top sheet 5 are each firmly adhered to each other by the adhesive sheet 13 without any gaps. In the gap 7 of each adjacent heating element 1, 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 to form a connecting portion 7 in which the adhesive sheet 13 adheres tightly. There is. 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 gap between the heating elements 1.1 is pressed particularly strongly from the front side. The heating elements 1,
A connecting portion 7 is recessed between the two. Therefore, in addition to being able to bend the heating element 1 at the connecting portion 7, the top sheet 5, the heat dissipation sheet 4, the adhesive sheet 13,
Since the heat insulating sheet 2 and the back sheet 3 are continuous from the front and back surfaces of the heating element 1, the strength of the connecting portion 7 does not decrease.

In this way, the heat insulating sheet 2, back sheet 3, heat dissipation sheet 4, and top sheet 5 are each densely laminated on the heat generating cord 1 to form the heat generating element 15, and adjacent heat generating elements 15 and 15 are connected. A panel heater A is constructed by being bendably connected at the portion 7 position. As shown in FIGS. 1 and 2, a corner reinforcing member 14 having a U-shaped cross section is attached to the corner of the panel heater A to protect the corner of the panel heater A. Further, 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. Also,! @
As shown in FIG. 4, the heating element 1 of each heating element 15
are connected by one heater wire. Further, on the inner surface of the corner reinforcing member 14 attached to the upper corner of the panel heater A, a switch working part 18 is provided to switch the power supply to the heating element 1.

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 portion is heated by placing the foot inside the panel heater A. It is something that can be done. 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 cord 1, the strength is strong, and each adjacent heating element 15
．． 15 (can be connected, panel heater A
Even if the joint WS7 is repeatedly bent, no cracks or the like will occur. Therefore, since the strength of the connecting portion 7 is strengthened, there is no need for a special hinge as in the conventional case.

Furthermore, since each sheet is closely adhered to each other by the adhesive sheet 13 without any gaps, no air layer is formed between each sheet, and no upward airflow of heated air layer is generated inside. It does not cause a temperature distribution where the upper part of the panel heater A is warm and the lower part is cold, and can uniformly dissipate heat from the front side of the panel heater A, and is a board-shaped panel heater Al7).
It can increase the strength. 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 rumination, etc.

[Effects of the Invention] As described above, the present invention has a plurality of heat generating elements arranged side by side with gaps in between, a heat insulating sheet and a back sheet on the back side of each heat generating element, and a heat insulating sheet and a back sheet on the front side of the heat generating element. A heat dissipation sheet and a surface sheet are laminated, and a connection part is formed in which each of the sheets is closely attached to the gap between each heating element, and each adjacent heating element is connected in a bendable manner at the connection part, so that the connection is achieved. Since each sheet that covers the front and back surfaces of the heating element is continuous, the strength of the connection part of the panel heater is strengthened, and cracks may occur in the connection part due to repeated use. Lnk
l! h at f15 11th glance
There is an advantage that productivity can also be improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a panel heater according to an embodiment of the present invention, v1
Figure 2 is a sectional view of the same as above, Figure 3 is a sectional view of the main part of the same as above, and Figure 4 is a sectional view of the same as above.
The figure is a partially cutaway front view of the panel heater same as the above, FIG. 5 is a partially cutaway front view of the conventional example, and FIG. 6 is a sectional view of the main part same as the above. 1 is a heating element, 2 is a heat insulating sheet, 3 is a back sheet, 4 is a heat radiation 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. Agent Patent Attorney Ishi 1) Ai Figure 72a3 Figure 4

Claims (3)

[Claims] (1) A plurality of heating elements are arranged in parallel with a gap in between, and a back sheet is laminated over the entire surface with a heat insulating sheet on the back side of each heating element, and a heat dissipating sheet is placed on the front side of each heating element. The sheets are laminated over the entire surface, and the above-mentioned back sheet, heat insulating sheet and heat dissipating sheet are placed in the gaps between each heating element.
A top sheet forms a tightly attached connecting portion, and a heating element formed by laminating a heat insulating sheet, a back sheet, a heat dissipating sheet, and a top sheet on the heating element is bendably connected at this connecting portion. A panel heater characterized by: (2) The panel according to claim 1, wherein the heat insulating sheet is formed 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. heater. (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 with an adhesive without any gaps.