JPH0540833Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to electric heating containers such as electric pots and rice cookers.

(Prior Art) Generally, as shown in FIG. 2, an electric heating container includes a body 3, a shoulder body 4 fitted to the upper end of the body 3,
A bottomed cylindrical main body 1 consisting of a bottom body 5 fitted to the lower end of the body 3 and a bottom plate 6 attached to the bottom of the bottom body 5.
The inner container 2a is housed therein, and the opening edge of the inner container 2a is fixed to the shoulder body 4 through a seal packing 4a. A heater 10a is attached to the bottom of the inner container 2a, and electrical components 7 such as a microcomputer, other control components, and electrical components are attached to the bottom of the main body 1, that is, the bottom body 5 or the bottom plate 6.

In this type of electric heating container, after filling the inner container 2a with water and allowing it to overflow for a certain period of time, water overflow is carried out to check the insulation between a non-charged metal part, that is, the inner container 2a, and a charged metal part, such as a power plug. Testing is being done.

(Problem to be solved by the invention) At the time of this water overflow test, water overflowing from the inner container 2a spills into the gap between the inner container 2a and the shoulder body 4, and between the shoulder body 4 and the body 3.
It enters between the main body 1 and the inner container 2a through the gap between the body 3 and the bottom plate 5, and drips down the outer surface of the inner container 2a onto the electrical components 7 attached to the bottom 5, causing poor insulation. Something happened. Further, after the water overflow test, when the main body 1 was tilted to drain the water in the inner container 2a, the water collected at the bottom sometimes flowed and further wetted the electrical components 7.

The present invention was devised in view of the above problems, and an object of the present invention is to provide an electric heating container with excellent insulating properties, which prevents water entering the inside from wetting electrical components.

(Means for Solving the Problem) In order to achieve the above object, the present invention provides an electric heating container in which an inner container is housed and fixed in a cylindrical body with a bottom, and an electric component is provided in a bottom member of the body. An annular water intrusion prevention wall is provided on the inner surface of the bottom member of the main body, the upper end of which is located inside the lower end outer periphery of the inner container, and a drain hole is formed on the outside of the water intrusion prevention wall to drain the water. A bottom plate is attached to the outer surface of the bottom member inside the hole.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows the bottom of an electric pot according to the present invention, where 1 is a main body and 2 is an inner container with a double vacuum structure. It consists of a bottom body 5 and a bottom plate 6.
Electrical components such as a control device 7a and a terminal 7b are attached to the inner surface of the bottom body 5 of the main body 1, and an annular water-intrusion prevention wall 8 is provided to surround these electrical components. The upper end of this water intrusion prevention wall 8 extends to the vicinity of the lower end of the inner container 2 and is located inside the outer periphery of the lower end. Further, a plurality of drain holes 9 are bored around the outer periphery of this water intrusion prevention wall 8.

Inside the bottom of the inner container 2, a heater case 11 containing a mica heater 10 is attached.
This heater case 11 is a circular hollow case in which an upper case 12 and a lower case 13 are joined together, and a lead-out pipe 14 provided in the lower case 13 is connected to a mounting hole 15 provided in the bottom of the inner container 2 through a packing 16. The nut 17 is inserted into the inner container 2 from below and screwed onto a male thread formed on the outer surface of the outlet pipe 14, thereby fixing the inner container 2 firmly. Further, an outflow pipe 18 whose upper end is fixed to the upper case 12 passes through the outlet pipe 14 and projects outward from the inner container 2, and an elbow 19 is attached to its lower end for guiding it to a pumping pipe (not shown). .

The mica heater 10 is a substantially annular heater that integrates a water heater and a heat retention heater, and is attached to the upper case 1.
The heater press plate 21 is inserted into a plurality of mounting bolts 20 fixed to the upper case 12 together with the heater holding plate 21, and is fixed to the inner surface of the upper case 12 by being tightened with a nut 22.

Further, inside the heater case 11, a thermistor 23 for detecting the water temperature inside the inner container 2 is fixed to the inner surface of the upper case 12 under pressure.

During this electric pot overflow test, water that entered between the main body 1 and the inner container 2 was removed from the inner container 2.
The liquid flows along the outer surface of the inner container 2 and drips from the outer periphery of the lower end of the inner container 2. At this time, since the water intrusion prevention wall 8 is located inside the lower end outer periphery of the inner container 2, water dripping from the lower end outer periphery of the inner container 2 falls onto the electrical components inside the water intrusion prevention wall 8. do not. Furthermore, since the water intrusion prevention wall 8 is formed in an annular shape, even if the main body 1 is tilted, water accumulated at the bottom of the water intrusion prevention wall 8
The water flows out from the drain hole 9 without entering the inside of the drain hole 9.

By the way, a surface heating element such as a mica heater can integrate heaters of different wattages and is compact, but on the other hand, if there is a gap between it and the surface to be heated, it is likely to generate abnormal heat and break, so conventionally, As shown in the figure, it was necessary to securely compress the upper cover 24 and lower cover 25. Therefore, when using a mica heater, there is no space for installing a thermostat, thermistor, etc., so mica heaters have been mainly used in ordinary electric pots that do not have an automatic shut-off function after boiling or a heat retention function. Also, Utsukai Showa 63
As shown in Japanese Patent No. 179910, mica heaters were generally used for heat retention with low power consumption, and sheathed heaters were generally used for boiling water.

However, in the electric pot of this embodiment, since the mica heater 10 is crimped to the inner surface of the upper case 12 by the heater pressing plate 21, the mica heater 10
An appropriate space can be formed below 0, and this space is used to accommodate the thermistor 23. In addition, the mica heater 10 is
1, it is securely pressed against the inner surface of the upper case 12, which is the surface to be heated, so that it can be fully used for boiling water without abnormal heat generation or wire breakage. Furthermore, the mica heater 10 is an integrated device for boiling water and for keeping warm, and is cheaper and simpler in structure than a separate sheathed heater for boiling water as shown in the above-mentioned publication.

In the above embodiment, an electric pot is provided with a wall to prevent water intrusion, but it goes without saying that the present invention can also be applied to other electric heating containers such as rice cookers.

(Effects of the invention) As is clear from the above explanation, according to the invention, water that has entered between the main body and the inner container is prevented from entering the electrical components by the water intrusion prevention wall, and the water is also prevented from entering the electrical components. Since it is discharged to the outside through the hole, it does not wet the electrical components and has excellent insulation properties.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the bottom of the electric pot according to the present invention, Figure 2 is a sectional view showing the state of water intrusion during a water overflow test of a conventional electric pot, and Figure 3 is the bottom of a conventional electric pot using a mica heater. FIG. 1...Main body, 2...Inner container, 5...Bottom body, 6...
...Bottom plate, 7a, 7b...Electrical components, 8...Water intrusion prevention wall, 9...Drain hole.

Claims (1)

[Claims for Utility Model Registration] An electric heating container in which an inner container is housed and fixed in a cylindrical body with a bottom, and an electrical component is provided on the bottom member of the main body, wherein an upper end of the inner container is located on the inner surface of the bottom member of the main body. An annular water intrusion prevention wall located inside the outer periphery of the lower end is provided, a drain hole is bored on the outside of the water intrusion prevention wall, and a bottom plate is formed on the outer surface of the bottom member inside the drain hole. An electric heating container characterized by being equipped with.