JPS62161318A - Heat-sensitive apparatus of cooker - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application Mokukomei relates to heat-sensitive devices for cooking appliances used in general household kitchens.

2. Description of the Related Art A conventional heat-sensitive device for a cooking appliance has a structure as shown in FIGS. 2 and 3. In the figure, numeral 1 is a switch section having a power supply 611 device, numeral 2 is an outer body, and numeral 3 is a lid that covers the opening of the hook 4. Reference numeral 5 denotes a heating element that heats the W 44 in which the food to be cooked is placed from the bottom, and a heat-sensitive bag @ 6 is provided in the center of the heating element 5 in close contact with the bottom of the pot 4 so as to be able to appear and retract freely.

This heat-sensitive device 6 has a heat-sensitive plate 7 at the upper end that is in close contact with the bottom of the IJ 14.
, a thermistor 8 that is in close contact with the inside of the heat-sensitive plate 7, a mounting bracket 9 that attaches the thermistor 8 in close contact with the heat-sensitive plate 7, and a mounting bracket 9 that wraps around the mounting portion of the thermistor 8 and has the heat-sensitive plate 7 caulked around the outer periphery at the upper end. A temperature fuse 12 and a thermistor lead I! are attached to a support metal fitting 11 fixed to the lower end of the inner case 10. 13, which wraps the inner case 10 from below and whose upper end is connected to the heating element 5.
The coil spring 15 is interposed between the bottom surface of the outer case 14 and the heat-sensitive plate 7 and urges the heat-sensitive plate 7 to come into close contact with the bottom of the steel 4. .

Problems to be Solved by the Invention In such a conventional configuration, the temperature fuse 12, which should be operated by sensitively detecting heat generation during abnormal conditions, is provided apart from the steel 4 bottom, so the operation becomes insensitive. There was a problem in that the entire vessel was destroyed due to abnormal heat generation of the heating element. Furthermore, if the temperature fuse is provided at a different location, additional mounting hardware and a mounting process will be required, resulting in increased costs. It is possible to fix the thermistor and temperature fuse inside the inner case with mounting brackets, but both lead wires may rub due to the vertical movement of the heat-sensitive g position depending on the presence or absence of a pan at the part that passes through the inner and outer cases, resulting in poor insulation. Moreover, when the lead wires are routed to other parts, the spring properties of the lead wires cause the heat-sensitive device to tilt and not come into close contact with the bottom of the pot. There were many difficulties in assembling the thermistor and temperature fuse into the heat-sensitive device.

The present invention solves the above problem, and aims to sensitively catch abnormal heat generation of a heating element, prevent damage to various parts of the main body, and facilitate the assembly of a heat-sensitive device. This is the purpose.

Means for Solving the Problem In order to solve this problem, the present invention provides a printed wiring board with a thermistor and a temperature fuse attached inside the inner case.

With this configuration, the thermistor and temperature fuse accurately detect the temperature at the bottom of the pot, and when abnormal heat generation occurs, the temperature fuse operates sensitively to open the power circuit and prevent the occurrence of danger.

EXAMPLE Hereinafter, an example of the present invention will be described based on the drawings (FIG. 1).

In the figure, a heating element 2 that heats a steel 21 in which food is placed
2 has a heat-sensitive plate 23 in close contact with the lower surface of @21, and a thermistor 24 and a temperature fuse 25 are pressed into contact with the inside of this heat-sensitive plate 23 by a mounting bracket 26. The thermistor 24 and temperature fuse 25 are fixed by soldering their terminals to the upper end of a vertically oriented printed wiring board 27 made of phenol or the like. On the printed wiring board 27, there is a microswitch that detects the presence or absence of the FA21 and sends a signal.When the steel 21 is present, the cutter part contacts the outer case 28 and turns on, and when the steel 21 is not present, the microswitch is turned off. 29 is provided in the middle part, and a connector 30 for connecting a plurality of wires at once is provided on the end face opposite to the steel, that is, the lower end, so as to transmit signals from the thermistor 24, temperature fuse 25, and microswitch 29. The printed wiring board 27 is fixed by caulking the upper end with the cut and raised part of the mounting fitting 26 and the middle part with the lower end of the inner case 31.

Further, the upper end of the inner case 31 is integrally fixed with the mounting bracket 26 by caulking the outer periphery of the heat-sensitive plate 23, thereby assembling a unit of the heat-sensitive device. A coil spring 32 is interposed between the bottom surface of the outer case 28 and the heat-sensitive plate 7 in order to press the heat-sensitive device against the bottom of the steel 21.

Effects of the Invention As described above, according to the present invention, both the thermistor that senses the temperature of steel and the temperature fuse can be easily attached to the heat-sensitive plate, and the temperature fuse is particularly sensitive when the heating element generates abnormal heat. It works well and can be reused without damaging any parts of the main body, and the heat-sensitive device can be easily assembled and removed from the main body, making it suitable for ceiling-mounted production, improving serviceability, and reducing costs. Many effects can be obtained, including the ability to achieve

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention, FIG. 2 is a sectional view of a conventional cooking appliance, and FIG. 3 is a sectional view of the main part. 21... Steel, 22... Heating element, 23... Heat sensitive plate,
24... Thermistor, 25... Temperature fuse, 26
...Mounting bracket, 27...Printed wiring board, 28.
...Outer case, 29...Micro switch, 30...
・Connector, 31... Inner case, 32... Coil spring agent Yoshihiro Morimoto Figure 2 Figure 3

Claims (1)

[Claims] 1. A heat-sensitive device for cookers that is installed in the center of the heating element that heats the pot in which food is placed and detects the temperature of the pot by contacting the bottom surface of the pot, and is a printed wiring with a thermistor and thermal fuse installed inside the inner case. A heat-sensitive device for cooking appliances equipped with a circuit board.