JPH053806U - Electric stove - Google Patents

Abstract

(57) [Abstract] [Purpose] The manufacturing process can be simplified, the temperature rises quickly, the temperature of the sheet heating element is lowered, and the service life is extended. Further, the serviceability is improved. [Structure] A heating unit 21 is provided on one surface of the plate 11. The heat generating unit 21 has a planar heating element 15 on one surface of the plate 11, which is a combination of fibers and heating wires. The plate-shaped heating element 15 is held by the holding means 15
Held in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an electric hob used for cooking and heating with a heat-resistant glass as a cooking surface.

[0002]

[Prior Art]

 Conventionally, an electric stove has a plate-like plate 11 like heat-resistant glass and a frame 12 holding the plate 11, as shown in FIGS. 6 and 7. A heating unit 21 is attached to one surface of the plate 11. The heating unit 21 includes an insulating base 18 in which a metal wire 17 such as a nichrome wire is embedded, an overheat protector 13 provided on the base 18, and a lower surface of the base 18 in contact with each other. It also has a heat insulating material 19 and a holding member 20 holding them integrally. The heat generating unit 21 is held by a holding member 20, and the base 18 is brought into close contact with the insulating plate 11.

In this electric stove, as shown in FIG. 7, two plates 11 are provided so as to be exposed on the upper surface of a frame body 21. A roaster portion 23 is provided at the center of one side surface of the electric stove, and operation portions 24 for operating the heat generating units 21 are provided on both sides of the roaster portion 23.

[0004]

[Problems to be solved by the device]

 However, this electric stove has a structure in which the metal wire 17 is embedded in the base 18, the overheat protector 13 is provided on the base 18, and the heat insulating material 19 is provided on the lower surface of the base 18 when the heating unit 21 is manufactured. Since the holding member 20 is provided, the manufacturing method is complicated and the manufacturing cost is high.

In addition, in the configuration of the heat generating unit 21, deterioration of insulation property immediately after energization, decrease of thermal efficiency and temperature rise are slow, the life of the heating wire is shortened due to high temperature, and serviceability is poor. There's a problem.

[0006] Therefore, an object of the present invention is to provide an electric stove which can be easily assembled to improve the insulation property immediately after energization, thermal efficiency and temperature rise, extended life of heating wire, and serviceability. .

[0007]

[Means for Solving the Problems]

 According to the present invention, in an electric hob having an insulating plate and a heating unit on one surface of the plate, the heating unit is a planar heating element in which inorganic or organic fibers and a heating wire are combined in a planar manner. And a holding means provided with the planar heating element in contact with one surface of the plate.

[0008]

[Action]

 A heating unit is provided on one surface of the plate. The heat generating unit has a planar heating element on one surface of which a ceramic fiber and a heating wire are combined in a planar manner. This heating unit is provided in contact with one surface of the plate.

[0009]

【Example】

 FIG. 1 shows an embodiment of an electric stove according to the present invention. In this embodiment, the same parts as those in FIGS. 6 and 7 are designated by the same reference numerals and the description thereof will be omitted.

Referring to FIG. 1, a heating unit 21 for an electric stove is provided with a sheet heating element 15 provided on one surface of the plate 11 and the sheet heating element 15 in contact with the one surface of the plate 11. Holding means. The sheet heating element 15 is one in which an inorganic or organic fiber such as a ceramic fiber yarn and a heating wire are integrated on one surface of the plate 11 by braiding or folding. As the fiber, one having heat resistance is used. One surface of the sheet heating element 15 is covered with a heat insulating material 14 such as micro-therm or ceramic fiber to prevent heat from escaping. These are held by a holding plate 16 which is a holding means so as not to separate from the plate 11. Further, the heat generating unit 21 is provided with an overheat preventive device 13.

The heat generating unit 21 of FIG. 2 is an example of a structure in which the overheat protector 13 of the heat generating unit 21 of FIG. 1 is installed between the planar heating element 15 and the heat insulating material 14.

Next, an example of assembling the heat generating unit 21 will be described below. The heat generating unit 21 has a cylindrical box body 25 in which the heat insulating material 14 is housed. A plurality of claw portions 26 extend on one surface of the box body 25. The planar heating element 15 is provided on these claw portions 26. The planar heating element 15 is locked to the claw portion 26 and integrated with the box body 25. In this way, when the box body 25 is attached to the frame body 12 by the holding plate 16, the electric stove is completed.

Further, in the heat generating unit 21 of FIG. 4, the sheet heating element 15 is provided on one surface of the box body 25, and a ring plate 27 such as metal or ceramics having an inner diameter slightly larger than the box body 25 is provided in the box. The outer peripheral surface of the body 25 is covered. In this manner, when the box body 25 is attached to the frame body 12 by the holding plate 16, the electric hob is completed.

Further, in the heat generating unit 21 of FIG. 5, one surface of the box body 25 is covered with the sheet heating element 15 having a diameter substantially the same as that of the box body 25. Next, the sheet heating element 15 is fixed to the box body 25 with screws 28. In this way, when the box body 25 is attached to the frame body 12 by the holding plate 16, the electric hob is completed.

[0015]

[Effect of the device]

 As described above with reference to the embodiments, according to the electric stove of the present invention, the heating unit has the planar heating element provided on one surface of the plate such as glass ceramic, so that the manufacturing process can be simplified and immediately after energization. In the electric stove according to the present invention, a value of several tens of MΩ can be obtained, whereas the conventional electric stove has a decrease in insulation of 2-3 MΩ.

In addition, since the planar heating element is directly attached to the plate, the temperature rises quickly (when heating 2 liters of water with a 2 kW heating element, the heating rate is increased by about 1 minute). Temperature can be lowered (from about 900 ° C to about 700 ° C) to extend the life of the planar heating wire (about 2 times, about 2500 hours from the conventional 2500 hours) to a built-in electric stove It will be able to withstand the target life sufficiently.

Further, there is an effect that power consumption can be reduced. Furthermore, by attaching a heating element to the plate, it is possible to improve serviceability by unitizing.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of a heat generating unit in an electric stove according to the present invention.

FIG. 2 is a cross-sectional view showing another embodiment of the heat generating unit of the electric stove according to the present invention.

FIG. 3 is a perspective view showing an assembled state of the heat generating unit of FIG.

FIG. 4 is a perspective view showing another example of an assembled state of the heat generating unit of FIG.

5 is a perspective view showing another example of an assembled state of the heat generating unit of FIG.

FIG. 6 is a cross-sectional view showing a conventional heat generating unit.

FIG. 7 is a perspective view showing an electric stove in which the heat generating unit of FIG. 6 is assembled.

[Explanation of symbols]

 11 plate 12 frame body 13 overheat protector 14 heat insulating material 15 planar heating element 16 holding plate 19 heat insulating material 21 heat generating unit 24 operation part

Claims (1)

[Claims for utility model registration] 1. In an electric hob having an insulating plate and a heating unit provided on one surface of the plate, the heating unit has a planar shape of inorganic or organic fibers and a heating wire. An electric hob comprising: a sheet heating element combined with the sheet heating element;