JPS6335722Y2 - - Google Patents

Description

[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a heating container such as a so-called electric water heater, and particularly relates to a mounting structure for a thermal response device.

B. Prior Art Conventionally, an electrical appliance is provided with a cylindrical container with a bottom, a heater provided at the bottom of the container to heat the container, and a temperature controller that detects the temperature of the container and controls energization of the heater. The water heater was made in 1986-103013.
It is shown in the publication No.

The above-mentioned electric water heater has a flat surface formed at a suitable location on the outer surface of the container, and a temperature regulator is brought into close contact with this flat surface. This is to make it easier to fix the temperature controller and to ensure that the temperature controller can detect the temperature of the container. However, if a cylindrical container has a flat surface, be sure to Since distortion occurs on the surface, the temperature regulator and the flat surface of the container may not come into close contact with each other, and there is a risk that the temperature regulator may malfunction.

C. Purpose of the invention In consideration of the above drawbacks, the present invention aims to prevent malfunctions of thermally responsive devices.

D. Structure of the invention The present invention includes a bottomed cylindrical metal container with a flat surface at a suitable location on the outer surface and a protrusion integrally formed on the flat surface, a heater for heating the container, and a heater that abuts on the protrusion. and a thermal response device that detects the temperature of the container and controls energization of the heater.

E. Embodiment An embodiment of the present invention will be described based on the electric water heater shown in FIGS. 1 to 5.

1 is a cylindrical exterior body with a handle body 2 on the outside wall and a liquid water inlet 3 on the top, a removable lid body 4 on the top opening, and a backing on the bottom opening. The lid 5 is fixed. Reference numeral 6 denotes a bottomed cylindrical metal container that is housed in the exterior body 1 and stores liquid, and has a concave flat surface 7 integrally formed at a suitable location on the outer surface.
A cross section where a circular hole 8 is formed approximately in the center of this flat surface 7
A shaped mounting bracket 9 is fixed by spot welding or the like. Further, on the flat surface 7, a circular protrusion 10 with a flat end surface is formed to bulge outward. When forming the flat surface 7, it is pressed using a press or the like, but with current technology, when a concave flat surface is integrally formed on the side surface of a metal cylinder, the flat surface is always causes distortion. However, if the protrusion 10 is formed to bulge out on the flat surface 7, the generation of such distortion is prevented, and the surface becomes a substantially completely flat surface, which can always stably abut against a thermally responsive device 12, which will be described later. Reference numeral 11 denotes a heater wrapped around the lower outer periphery of the container 6, which heats the container 6. 12 is a thermal response device that comes into contact with the protrusion 10 to detect the temperature of the container 6 and control the energization of the heater 11; 12a is a cylindrical case with a bottom;
Reference numeral 2b indicates a dish-shaped partition plate that is fitted onto the upper end of the partition plate and forms a contact chamber within the case 12a, and 12c indicates a partition plate 12.
Spherical bimetal placed in the recess of b, 12d
is made of metal and wraps around the upper part of the case 12a and the outer periphery of the partition plate 12b, covers the recess on the partition plate 12b, forms a bimetal chamber between the partition plate 12b, and serves as a mounting plate for the mounting bracket 9. cover, 12e
12f is a fixed contact provided in the contact chamber; 12f is a support fitting for a movable contact plate also provided in the contact chamber;
12g is a movable contact plate whose one end is caulked to the support fitting 12f, and 12h is a movable contact plate 12i fixed to the other end of the movable contact plate 12g, which loosely passes through a hole provided in the center of the partition plate 12b and connects to the bimetal 12c. Rods 12j and 12j that transmit movement to the movable contact plate are supporting metal fittings 1 for the fixed contact 12e and the movable contact plate 12g.
A pair of electrical terminals connected to 2f. This thermal response device 12 fixes the cover 12d to the mounting bracket 9 by bringing the distal end surface of the cover 12d into contact with the distal end surface of the protrusion 10 through the circular hole 8 of the mounting bracket 9, so that the container 6 is kept at a predetermined temperature. When the bimetal 12c, which had been curved upward, curves downward, the movable contact plate 12g is pushed downward via the rod 12i, and the movable contact 12h is separated from the fixed contact 12e. It works to open 11 circuits. However, the cover 12d
The outer periphery is connected to the case 12a and the partition plate 12.
Since the cover 12d is fixed by pressure bonding to the cover 12d, the distal end surface of the cover 12d is slightly curved outward during the process, and when the thermal response device 12 is initially fixed, the flat surface of the protrusion 10 and approximately the center of the tip surface of the cover 12d are in surface contact with each other. However, with long-term use, in addition to the heat from the heater 11 and the container 6, the distal end surface of the cover 12d deforms into a substantially flat shape due to the fact that it is in contact with and fixed to the protrusion 10. contacts the tip surface of the protrusion 10, and the amount of heat conducted to the bimetal 12c changes, and the initial response temperature of the thermally responsive device 12 may deviate from a predetermined value. However, as shown in the figure, the diameter l1 of the protrusion 10 and the thermal response device 12
The area between the initial contact surface when the thermally responsive device 12 is fixed and the contact surface when the tip surface of the cover 12d is deformed into a substantially flat surface after time has elapsed by setting the ratio to the diameter l2 of the cover 12d to be approximately 1:1.6. The above-mentioned phenomenon can be prevented by keeping the value almost unchanged.

F. Effects of the Invention The present invention includes a bottomed cylindrical metal container integrally formed with a flat surface at a suitable location on the outer surface, a heater for heating the container, and a heater for detecting the temperature of the container and controlling energization of the heater. In those consisting of a response device,
Since a protrusion is formed on the flat surface and the thermally responsive device is brought into contact with the protrusion,
When the flat surface is integrally formed on the container, the strain generated on the flat surface can be absorbed by the protrusion, and the thermally responsive device always comes into contact with the protrusion in a stable state. Since it is possible to prevent malfunction of the thermal response device and also to prevent distortion of the container, the quality of products using this container can be improved.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the electric water heater of the present invention;
3 is a perspective view of the main part of the container, FIG. 4 is a vertical sectional view of the main part of the container, and FIG. 5 is a cross-sectional view of the container and the thermal response device. FIG. 6... Container, 7... Flat surface, 10... Protrusion,
11... Heater, 12... Thermal response device.

Claims (1)

[Scope of utility model registration request] A container consisting of a bottomed cylindrical metal container with a flat surface integrally formed on the outer surface thereof, a heater that heats the container, and a thermal response device that detects the temperature of the container and controls energization of the heater. A heating container characterized in that a protrusion is formed on the flat surface, and the thermally responsive device is brought into contact with the protrusion.