JPH05103Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a temperature sensor for a cooker that is provided at the center of the bottom of an outer pot and detects the temperature of the inner pot.

[Conventional technology]

As an example of a conventional cooking device temperature sensor, as shown in FIG. There is one equipped with a heat sensitive body 1 that moves up and down. According to this heat sensitive body 1, the temperature of an inner pot (not shown) placed on the heat sensitive body 1 is detected by a heat detection element 3 such as a thermistor fixed in the surface of the upper cover plate 2. Based on this detected temperature, the control circuit controls the temperature of the hot plate 10.
energization is controlled.

The heat sensitive body 1 includes a heat detection component 20 in which a heat detection element 3 is covered with a case 4 made of an insulator such as a silicon tube. The heat detection component 20 is fixed to the lower surface of the upper cover plate 2 by a fixing metal fitting 6. The fixing fitting 6 is fixed together with the inner case 7 to the periphery of the upper cover plate 2 by caulking or the like. Further, a compression coil spring 8 is provided between the outer wall of the heat sensitive element 1 and the inner wall of the outer case 5 in order to support the heat sensitive element 1.

According to the above-described temperature sensor for a cooker, the inner pot is inserted inside the outer pot, the bottom surface of the inner pot is brought into contact with the top surface of the heat sensitive element 1, and the temperature can be detected by the heat detection element 3.

[Problem that the invention attempts to solve]

However, the bottom of the inner pot or the upper cover plate 2 of the heat sensitive element 1
If foreign matter such as dust adheres to the top surface, since the top surface of the upper cover plate 2 is flat, a gap will form at the contact surface between the bottom surface of the inner pot and the heat sensitive element 1, making it difficult to accurately control the temperature of the inner pot. It may not be detected.

Moreover, as is clear from FIG. 6, the upper cover plate 2,
Since it is in almost line contact with the heat detecting component 20, the contact area is small, and the heat detecting element 3 has the disadvantage that it is easily influenced by the temperature of the surroundings other than the heat sensitive element 1.

[Means for solving problems]

According to the present invention, in a temperature sensor for a cooker that is controlled by a temperature detection signal from a heat detection element built in a heat sensitive body that moves up and down depending on whether or not a heated object is mounted, the heat sensitive body has an upper part on its upper surface. A temperature sensor for a cooker is obtained, comprising a lid plate and a convex portion projecting from the upper surface of the upper lid plate, and the heat detection element is disposed on the lower surface of the convex portion.

That is, according to the present invention, in the temperature sensor for a cooker that is controlled by a temperature detection signal from a heat detection element built in a heat sensitive body that moves up and down depending on whether a heated body is mounted, the heating body The upper cover plate has a protruding convex portion on the upper surface of the upper cover plate, the heat detection element is disposed on the lower surface of the convex portion, and the convex portion is connected to the object to be heated. A temperature sensor for a cooker characterized by having a shape that makes line contact is obtained.

〔Example〕

An example of the temperature sensor for a cooker according to the present invention is as follows.
This will be explained with reference to the drawings.

Referring to FIGS. 1 and 2, a heat sensitive element 1 includes an upper cover plate 2 made of a material with good thermal conductivity and having a convex portion protruding from the upper surface at the center, and a case 4 made of resin or the like with good thermal conductivity. The heat detection element 3 is inserted into the top cover plate 2, and the heat detection component 20 is disposed in a recess formed on the back side of the convex portion 13 of the upper cover plate 2. 2 and an inner case 7. By positioning the fixing metal fitting 6 between the inner case 7 and the upper cover plate 2 and mechanically caulking the peripheral edge of the upper cover plate 2, the heat detection component 20 can be attached to the upper part by the fixing metal fitting 6. It is pressed against the lid plate 2 and fixed so as to be compressed. A compression coil spring 8 is provided between the outer wall of the heat sensitive element 1 and the inner wall of the outer case 5 to constantly raise the heat sensitive element 1. A temperature sensor is thus formed.

FIG. 2 shows the situation when the inner pot is not placed and the heat sensitive element 1 is in the raised position. Now, when inserting the inner pot 11 as shown in Fig. 3, the bottom surface of the inner pot 11 and the upper lid plate 2
The convex portions 13 of the two come into contact with each other. At this time, even if foreign matter such as dust is placed or attached to the heat sensitive element 1, there is little risk of a gap remaining between the bottom of the inner pot and the convex portion 13 of the upper lid plate 2. . Therefore, when the inner pot 11 is inserted, contact between the bottom surface of the inner pot 11 and the convex portion 13 of the upper lid plate 2 is ensured.
Therefore, the temperature of the inner pot can be accurately detected by the heat detection element 3 of the heat detection component 20 fixed in the recess on the back surface of the convex portion 13.

The heat detection component 20 also includes an upper cover plate 2 of the heat sensitive element 1.
Since the contact area is large and it is compressed and fixed by the fixing fitting 6 with poor thermal conductivity,
The temperature of only the heat sensitive body 1 (approximately the same temperature as the bottom surface temperature of the inner pot) is detected, and it is not easily influenced by the temperature of the surroundings other than the heat sensitive body 1 (for example, below the bottom of the inner case 7).

Further, as shown in FIG. 5, an elongated opening 15 may be formed in the upper cover plate 2, and a convex portion 13 may be formed by a part of the temperature detection component 20 itself. According to the structure shown in FIG. 5, by having the opening 15, a gap is created between the convex portion 13 and the heat sensitive body 1, and the heat radiation from the convex portion 13 of the heat sensitive body 1 is reduced.

[Effect of idea]

As described above, according to the present invention, it is possible to obtain a temperature sensor for a cooker that is less susceptible to the effects of foreign objects on the heat sensitive body and less affected by the ambient temperature.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the temperature sensor for a cooker according to the present invention, Fig. 2 is a longitudinal cross-sectional view of the same embodiment, and Fig. 3 is an exploded perspective view of an embodiment of the temperature sensor for a cooker according to the present invention. FIG. 4 is a perspective view showing still another embodiment, and FIG. 5 is a longitudinal sectional view of an example of a temperature sensor in a conventional cooking appliance. DESCRIPTION OF SYMBOLS 1... Heat sensitive element, 2... Upper cover plate, 3... Heat detection element, 6... Fixing metal fittings, 7... Inner case, 8...
... Compression coil spring, 11 ... Inner pot, 13 ... Convex portion, 20 ... Heat detection component.

Claims (1)

[Scope of Claim for Utility Model Registration] In a temperature sensor for a cooker that is controlled by a temperature detection signal from a heat detection element built into a heat sensitive body that moves up and down depending on whether or not a heated body is mounted, the heating body is has an upper cover plate and a protruding protrusion on the upper surface of the upper cover plate, the heat detection element is disposed on the lower surface of the protrusion, and the protrusion is connected to the object to be heated. A temperature sensor for a cooker characterized by having a shape that makes line contact.