JPH0467311B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention is an electric heating device for cooking, in particular, a heating plate forms a heating surface on a heating wire such as a nichrome wire, and a cooking pot or the like is placed on this heating surface for cooking. This invention relates to a heater unit for an electric heater.

BACKGROUND TECHNOLOGY A conventional heater unit of this type is a heater unit of the fourth type, as shown in Japanese Patent Publication No. 52-29454, for example.
The configuration was as shown in the figure. That is, 1
2 is a metal outer plate, 2 is a microporous heat insulating material, and 3 is a disk on which a heating wire 4 is placed, which is made of a thin heat insulating material. 5 is a fixture for fixing the heating wire 4, 6 is a thin ring made of a heat insulating material, and on top of this ring 6 is placed a heat resistant cover 7 made of ceramic glass or the like.

Problems to be Solved by the Invention However, in such a conventional configuration, since the heat-resistant cover 7 is not fixed, there is a risk that it may come off due to external force such as vibration. Furthermore, there was also the problem that the means for fixing each component and attaching it to a product were insufficient, making it difficult to use as a heater unit.

The present invention solves these problems,
The object of the present invention is to provide a heater unit that is safe and streamlined in terms of assembly workability.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention includes a heater coil mounted on a ceramic plate on the bottom of a dish-shaped heater case made of ceramic or metal and having a through hole in the center. The arranged heater base is placed, an insulating material with good thermal conductivity is filled on the heater base in the heater case, and the upper part of the heater case is covered with a metal heating plate whose surface is coated with ceramic. A sensor case and a sensor are inserted into a through hole provided in the center of the heating plate, and a flange provided at the upper opening of the sensor case is brought into contact with the periphery of the through hole provided in the center of the heating plate, On the other hand, attach a tightening screw to the tightening screw attachment part of the tightening fitting provided at the bottom of the sensor case, and bring the tip of this tightening screw into contact with the back side around the through hole provided in the heater case, connecting the heating plate and the heater case. is clamped and fixed between the flange of the sensor case and the tip of the tightening screw.

Effect With this configuration, the heating plate, which is the heating surface, will not come off, and the insulating material inside the heater case and the heater base are sandwiched and fixed between the heater case and the heating plate, and the sensor case The heating plate and the heater case can be fixed at the same time by tightening the tightening screws, thereby making it possible to obtain a heater unit that is streamlined in terms of assembly workability.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In the figure, 11 is a dish-shaped heater case made of ceramic or metal, and has a through hole 11a provided in the center. 12 is a ceramic plate 13 with a heater coil 14
A through hole 12a having the same size as the through hole 11a is provided in the center of the heater base 12, and the heater base 12 is placed on the bottom surface of the heater case 11. ing. Reference numeral 15 denotes an insulating material with good thermal conductivity, and this insulating material 15 efficiently transfers the heat generated by the heater coil 14 and provides electrical insulation.
16 is a metal heating plate, the surface of which is coated with ceramic to prevent corrosion,
Or it is coated with heat-resistant paint. By covering the upper part of the heater case 11 with the heating plate 16, the insulating material 15 and the heater base 12
is fixed. Furthermore, a through hole 16a equivalent to the through hole 11a is provided in the center of the heating plate 16. 17 is a sensor that detects the temperature at the bottom of the cooking pot; 18 is a sensor case that holds the sensor 17; this sensor case 18 has a substantially cylindrical shape and has been heat-resistant treated; A flange portion 18a is provided at the upper opening, and when this sensor case 18 is inserted into the through holes 16a, 11a, the flange portion 18a comes into contact with the periphery of the through hole 16a provided in the center of the heating plate 16. . After the sensor case 18 is inserted, a through hole 1 provided at the bottom of the fastening fitting 19 is inserted into the bottom of the sensor case 18.
The fastening fitting 19 is attached by bending after inserting into the hole 9a. The upper end flange portion 19b of this tightening fitting 19 includes a mounting portion 19c for assembling into equipment and a tightening screw mounting portion 19.
d is provided integrally. Reference numeral 20 denotes a tightening screw, and this tightening screw 20 is attached to the tightening screw attachment part 19c. By tightening this tightening screw 20, the tip of the tightening screw 20 is attached to the back side around the through hole 11a provided in the heater case 11. comes into contact with. As a result, the heater case 11 and the heating plate 16 are clamped and fixed between the flange portion 18a of the sensor case 18 and the tip of the tightening screw 20. 21 is a coil spring that always urges the sensor 17 upward.

Note that the heating plate 16 may be constructed of a ceramic plate.

In addition, FIG. 3 shows another embodiment, in which a notch is provided in the side surface of the sensor case 18, and a member 18c formed by this notch is raised during assembly and provided in the heater case 11. By applying it between the cut and raised protrusions 11b, the sensor case 18 can be fixed without using the tightening screws 20. In addition, by using a stainless steel plate as the material for the sensor case 18, the springiness of the material can be utilized.
This makes it more effective.

Effects of the Invention As described above, according to the present invention, after the heater case and the heating plate constituting the heater unit are sandwiched between the flange of the sensor case and the tip of the tightening screw, the tightening screw is tightened to fix the heater case and the heating plate. This allows the heater case and heating plate that make up the heater unit to be fixed and the sensor case to be fixed at the same time.This configuration prevents the parts that make up the heater unit from disassembling due to vibration or external force. Thus, it is possible to obtain a heater unit which can be streamlined in terms of assembly workability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a heater unit showing an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same heater unit, FIG. 3 is a cross-sectional view of a heater unit showing an embodiment of the present invention, and FIG. The figure is a sectional view showing a conventional heater unit. 11... Heater case, 11a... Through hole, 1
2... Heater base, 13... Ceramic board, 1
4... Heater coil, 15... Insulating material, 16...
heating plate, 16a...through hole, 17...sensor,
18...Sensor case, 18a...Flange part, 19...Tightening metal fittings, 19d...Tightening screw mounting part, 20...Tightening screw.

Claims (1)

[Claims] 1. A dish-shaped heater case made of ceramic or metal and having a through hole in the center;
A heater base placed on the bottom surface of the heater case and having a heater coil arranged on a ceramic plate, an insulating material with good thermal conductivity filled on the heater base in the heater case, and an upper part of the heater case. a metal heating plate whose surface is coated with ceramic; a through hole provided in the center of the heating plate; and a sensor case and sensor inserted into the through hole provided in the heater case; The sensor case is approximately cylindrical and has a flange at its upper opening.
Then, the flange portion is brought into contact with the periphery of the through hole provided in the center of the heating plate, and a tightening screw is attached to the tightening screw attachment portion provided on the tightening fitting provided at the bottom of the sensor case, and the tightening screw is A heater unit in which a heating plate and a heater case are clamped and fixed by a flange of a sensor case and a tip of a tightening screw, with the tip of the heating plate and the heater case in contact with the back side around a through hole provided in the heater case.