JP2734431B2 - Electric pot - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric pot in which an electric heater is provided at a lower portion of the bottom of a liquid storage cylinder.

[0002]

Conventionally, in this type of electric pot, as shown in FIG. 5, a planar electric heater 4 is in contact with a bottom surface 3 of a liquid storage cylinder 2 stored in an outer case 1. The electric heater 4 is pressed by the bottom member 5 so as to contact the bottom surface 3, and the end 6 of the bottom member 5 is fixed to the bottom surface 3 by welding. By operating the air pump 8 provided on the lid 7, the liquid stored in the cylindrical body 2 can be discharged from the discharge port 10 through the drain passage 9.

In such a conventional electric pot,
Since the cylindrical body 2 is formed of, for example, iron such as stainless steel, if the end 6 of the bottom member 5 is fixed by welding, the metal structure of the welded portion changes, and as a result, the welded portion is corroded and rust is formed. There are problems such as occurring in the cylindrical body 2.

Accordingly, the present invention solves the above-mentioned problems, and in an electric pot in which an electric heater is provided via a bottom member at a lower portion of the bottom of a cylinder for containing liquid, the bottom member is connected to the cylinder without using welding means. An object of the present invention is to provide an electric pot that is fixed to a bottom surface and does not generate rust.

[0005]

According to the present invention, there is provided an electric pot in which an electric heater is provided at a lower portion of a bottom surface of a bottomed cylindrical body for containing liquid, the lower portion of the electric heater is pressed to apply the electric heater to the bottom surface. An electric pot capable of attaching the electric heater to the lower portion of the bottom surface without using welding by the pressing portion and the bottom member, wherein a pressing portion for caulking from the outer periphery of the cylindrical portion of the cylindrical body is connected to a contacting bottom member.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The cylindrical body 12 for storing liquid such as water stored in the outer case 11 is formed by processing a single stainless steel plate and forming a cylindrical portion 14 as a cylindrical portion on a circular bottom surface 13. A lid 16 provided with an air pump 15 is provided on the outer case 11 so as to be openable and closable, and by operating the air pump 15, water or the like stored in the cylindrical body 12 is drained. A discharge port of the lid 16 from a port 17 through a drainage path 18
It can be put out from 19.

The electric heater 20 provided on the bottom surface 13 includes:
An upper heat transfer plate 21 made of a material having a higher thermal conductivity than the upper portion, for example, aluminum or an aluminum alloy, a material having a higher thermal conductivity as an electrical insulating material, for example, an upper electrical insulating plate 22 made of mica, Materials with excellent conductivity,
For example, a heater body 26 in which two types of heating wires 24 having different resistances are wound around an electrical insulating plate 23 made of mica, and a heater body 26 made of a material having excellent thermal conductivity, such as mica, is used. A lower electric insulating plate 27 and a lower heat transfer plate 28 made of a material having excellent thermal conductivity, for example, aluminum or an aluminum alloy. These upper heat transfer plate 21, upper electric insulating plate 22, heater body 26, lower electric insulating plate The plate 27 and the lower heat transfer plate 28 are disposed one on top of the other, and the bent pieces 29 provided on both sides of the upper heat transfer plate 21
It is bent and integrated on the lower surface side. The upper heat transfer plate 2
1, upper electric insulating plate 22, electric insulating plate 23, lower electric insulating plate 2
7 and a hole 21 in the center of the lower heat transfer plate 28 for mounting the temperature sensor 30 on the bottom surface 13 through a mounting projection 30A.
A, 22A, 23A, 27A and 28A are formed. Also,
Reference numeral 31 denotes a lead wire of the heating wires 24 and 25, which is connected to a control device (not shown).

Reference numeral 32 denotes a disk portion serving as a bottom member for pressing the electric heater 20 against the bottom surface 13, and the disk portion 32 has a disk shape substantially the same shape as the bottom surface 13; mouth
A through hole 33 of the drainage passage 18 is formed opposite to 17, and a concave portion 34 is formed so as to contact a bent piece portion 29 provided by bending the heater main body 26. . Further, a short cylindrical portion 35 is provided at an edge of the disk portion 32. The disk portion 32 and the short cylindrical portion 35 are made of a material having excellent thermal conductivity, for example, aluminum or an aluminum alloy, and are integrally formed by press working or the like. An electric heater 20 having the heater main body 26 and the like integrated therewith is disposed on the bottom surface 13, and the disk portion 32 is vertically moved by a press portion 36 of a disk-shaped pneumatic or hydraulic device (not shown). The short cylindrical portion 35 is fitted to the cylindrical portion 14 by applying the pressure of arrow A). Next, in the drawing radially arranged from the lateral side of the outer periphery of the short cylindrical portion 35 (arrow B), 6
Pneumatic or hydraulic device (not shown)
Simultaneously. The caulking jig 37 has a tip 37A that is sharply formed in the lateral direction. By pressing the tip 37A, the short cylindrical portion 35 is formed with a caulking pressing portion 38 that cuts into the cylindrical portion 14, and The cylindrical portion 35 and, consequently, the disk portion 32 are fixed with the electric heater 20 pressed against the bottom surface 13. Reference numeral 38A denotes a small projection formed inside the cylindrical portion 14 by the caulking pressing portion 38. Therefore,
A part of the short cylindrical portion 35 is cut into the cylindrical portion 14 by the caulking pressing portion 38 and plastically processed, and the cylindrical body 12 and the electric heater 20 The short cylindrical portion 35 is assembled into the outer case 11. When electricity is supplied to one or both of the heating wires 24 and 25, the heating wires 24 and 25 generate heat, and the heat is generated by the upper electric insulating plate 22, the upper heat transfer plate 21, and the bending. The bottom surface 13 is heated through the piece 29. Further, the heat passes through the lower electric insulating plate 27, the lower heat transfer plate 28, and the bent piece portion 29 to heat the bottom surface 13 to boil water (not shown) stored in the cylindrical body 12.

As described above, in the above embodiment, the lower portion of the electric heater 20 is pressed against the bottom surface 13 of the cylindrical body 12 so that the electric heater 20 is brought into contact with the disk portion 32 which abuts on the bottom surface 13.
Since the pressing portion 38 for caulking from the outer periphery of the cylindrical portion 14 of the cylindrical body 12 is provided continuously, a welded portion can be wiped out when the electric heater 20 is attached to the bottom surface 13, so that the material deterioration of the cylindrical body 12 and , Rust and the like can be eliminated.

Further, by forming the bottom member for pressing the electric heater 20 against the bottom surface 13 as a disk portion 32 substantially the same as the bottom surface 13, the electric heater 20 can be entirely pressed, so that the electric heater 20 can be uniformly pressed. The entire surface of the projecting piece 29 can be in contact with the bottom surface 13, and heat conduction from the projecting piece 29 to the bottom surface 13 can be performed well. In addition, since a part of the short cylindrical portion 35 which is connected to the disk portion 32 and fits with the cylindrical portion 14 is caulked and the caulking pressing portion 38 is provided, the bottom surface 13 side of the cylindrical portion 14 is oval by caulking. There is no deformation like shape. Also, as shown in FIG. 2, the caulking jig 37 is arranged radially and simultaneously the caulking pressing portion 38 is formed, so that the short cylindrical portion 3
5. It can be formed without distortion or the like of the cylindrical portion 14.

Further, the disk portion 32 is connected to the electric heater 20.
Since the caulking pressing portion 38 is formed in a state in which the electric heater 20 is pressed, the electric heater 20 can be securely mounted in a state in which the electric heater 20 is in contact with the bottom surface 13.

It should be noted that the present invention is not limited to the above-described embodiment. For example, the caulking pressing portion is not limited to the short cylindrical portion 35 at six locations, but may be radial. Various modifications are possible, such as the strength may be improved.

[0013]

According to the present invention, there is provided an electric pot in which an electric heater is provided at the lower portion of the bottom of a bottomed cylindrical body for containing liquid, wherein the lower portion of the electric heater is pressed to contact the electric heater with the bottom member. Since the pressing portion for caulking from the outer periphery of the cylindrical portion of the cylindrical body is continuously provided, the electric heater can be attached to the bottom surface without using welding, and the deterioration of the material, rust and the like due to welding can be eliminated.

[Brief description of the drawings]

FIG. 1 is a partially enlarged sectional view showing an embodiment of the present invention.

FIG. 2 is an overall exploded perspective view showing an embodiment of the present invention.

FIG. 3 is an exploded perspective view of an electric heater according to an embodiment of the present invention.

FIG. 4 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 5 is a partially enlarged sectional view showing a conventional example.

[Explanation of symbols]

 12 Cylindrical body 13 Bottom 14 Cylindrical part (cylindrical part) 20 Electric heater 32 Disk part (bottom member) 38 Caulking pressing part

Claims (1)

(57) [Claims] 1. An electric pot in which an electric heater is provided at a lower part of a bottom surface of a bottomed cylindrical body for storing liquid, wherein a bottom member which presses a lower part of the electric heater and abuts the electric heater on the bottom surface is provided with the cylindrical body. An electric pot characterized in that a pressing portion for caulking from the outer periphery of the cylindrical portion is provided continuously.