JPS647595Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a carbon heater used as a heat source when heating a room from the floor or the like or when melting snow accumulated on a roof.

(Prior Art) As shown in FIGS. 3 and 4, conventional carbon heaters are made of rubber. Insulating sheet 1 provided with a resistance heating layer 11 made of plastic mixed with carbon
Feeder wires 12, 12 are arranged on both longitudinal edges of the insulation sheet 10, and an external insulation sheet 13 is attached to the upper surface of the insulation sheet 10 by a method such as pasting. It was constructed so that electricity could be applied to generate heat in the resistance heating layer 11 to heat the room or to melt snow that had accumulated on the roof.

(Problems with the prior art) In carbon heaters with such a conventional structure, the amount of heat generated can be adjusted according to the size of the room to be heated using rubber. The adjustment was made by adjusting the amount of carbon mixed in the resistance heating layer 11 made of plastic mixed with carbon, or by adjusting the thickness of the resistance heating layer 11 provided on the upper surface of the insulating sheet 10. It is extremely difficult to adjust the amount of heat generated by the carbon heater depending on the proportion of carbon mixed in the plastic, the thickness of the resistance heating layer 11 provided on the top surface of the insulating sheet 10, etc., and variations occur. A feeder wire 1 that energizes the resistive heating layer 11
If wires 2 and 12 are disconnected, an overcurrent will flow through a part of the resistance heating layer 11, causing the resistance heating layer 11 to locally generate abnormal heat, or an arc to occur in the disconnected portion, causing abnormal overheating of the carbon heater due to the arc heat. There was a problem.

(Means for solving the problem) The present invention is to wrap a feeder wire that conducts electricity to a resistance heating layer provided on the top surface of an insulating sheet, so that a parallel sub-feeder wire can be used to arbitrarily adjust the amount of heat generated by the resistance heating layer. The above-mentioned problem was solved by disposing it in the

(Function) As mentioned above, the heat generation amount of the resistance heating layer is reduced by wrapping it on the inner resistance heating layer of the feeder wire provided on both longitudinal edges of the insulating sheet provided with the resistance heating layer. By placing sub-feeder lines in parallel for arbitrary adjustment,
The width of the resistance heating layer between the feeder wires that conduct electricity to the resistance heating layer is reduced by the width of the sub-feeder wire, and the resistance value of the resistance heating layer is reduced by that width, increasing the amount of heat generated, so the width of the resistance heating layer is reduced by the width of the sub-feeder wire. The calorific value of the carbon heater can be adjusted arbitrarily by simply changing the width of the sub-feeder wire wrapped around the wire, and the sub-feeder wire can be bypassed if the feeder wire is broken. Since the electric circuit is maintained as a circuit, the carbon heater does not locally generate abnormal heat or generate arcs at disconnected parts.

(Embodiment of the present invention) Hereinafter, an embodiment of the present invention will be explained with reference to the drawings. In Figs. Rubber on the top. A resistance heating layer 2 made of plastic mixed with carbon is provided. Reference numerals 3 and 3 denote feeder wires made of copper braided wire or copper foil that conduct electricity to the resistance heating layer 2, and the feeder wires 3 and 3 are provided on both longitudinal edges of the insulating sheet 1. 4, 4 are sub-feeder wires made of copper braided wire or copper foil, etc., and the sub-feeder wires 4, 4 are wrapped around the feeder wires 3, 3 and arranged in parallel on the inner resistance heating layer 2 thereof. . By appropriately selecting the width W of the sub-feeder wires 4, 4, the heating area of the resistance heating layer 2 is changed, and the amount of heat generated by the carbon heater is adjusted to an arbitrary predetermined amount of heat. Incidentally, it is also possible to omit either one of the sub-feeder wires 4, 4 to adjust the amount of heat generated. Further, reference numeral 5 in the figure indicates an external insulating sheet laminated on the upper surface of the insulating sheet 1.

(Effects of the present invention) The present invention is as described above, and the resistance heating layer 2 provided on the upper surface of the insulating sheet 1 is wrapped around the feeder wires 3, 3 which conduct electricity, and the heat generation amount is transferred onto the inner resistance heating layer 2. By providing the sub feeder lines 4, 4 to be adjusted in parallel, the sub feeder lines 4, 4
Not only can the heat generation amount of the entire resistance heating layer 2 be adjusted to an arbitrary predetermined value extremely easily and uniformly by simply selecting the width dimension W of Even if the sub-feeder wire 4 acts as a bypass circuit, the circuit is maintained in a energized state, and an excessive current does not concentrate on a part of the resistance heating layer 2. There is no risk of abnormal heat generation or arcing at the disconnected part, and there is no risk of the carbon heater abnormally overheating due to arc heat, and it has excellent advantages such as eliminating accidents caused by overheating of installed carbon heaters, etc. .

[Brief explanation of the drawing]

Fig. 1 is a cutaway perspective view of a main part showing an embodiment of the present invention, Fig. 2 is a sectional view taken along the line X-X of Fig. 1, and Fig. 3 is a cutaway explanatory view of a conventional carbon heater. , FIG. 4 is a sectional view taken along the Y--Y line in FIG. 3. 1... Insulating sheet, 2... Resistance heating layer, 3... Feeder line, 4... Sub feeder line.

Claims (1)

[Scope of utility model registration request] In a carbon heater, feeder wires that conduct electricity to the resistance heating layer are arranged on both longitudinal edges of an insulating sheet with a resistance heating layer made of rubber or plastic mixed with carbon. A carbon heater characterized in that a sub-feeder wire is arranged in parallel on the layer to wrap around the feeder wire and arbitrarily adjust the amount of heat generated by the resistance heating layer.