JPH038205Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an electric kettle that directly heats the liquid in the pot body by generating heat in the heat generating part. This relates to an electric kettle that is designed to prevent empty cooking from occurring.

[Conventional technology]

Conventionally, this type of electric kettle (hereinafter simply referred to as a pot) is used by placing it on a flat surface such as a table and dispensing the contents using air pressure without tilting it. A pot A as shown is provided. The configuration of this pot A will be explained with reference to FIG.
is a metal outer cylinder, and an inner cylinder 2 with a bottom is provided inside the outer cylinder 1, and the upper end of the inner cylinder 2 is connected to an opening 3 at the upper end of the outer cylinder 1. has been done. A bottom plate 4 is integrally provided at the lower end of the outer cylinder 1, a bottom member 5 is attached to the bottom plate 4 with screws, and a vacuum layer is formed between the inner cylinder 2, the outer cylinder 1, and the bottom plate 4. It is formed.

The outer cylinder 1 and the inner cylinder 2 constitute a pot body 6 that can store liquid therein and keep the liquid warm.

A belt-shaped heater 7 is wound around the lower part of the outer peripheral surface of the inner cylinder 2, and a thermostat 8 and a temperature fuse 9 are fixed to the outer bottom surface. The heater 7 heats the liquid 10 in the inner cylinder 2 through the wall surface of the inner cylinder 2,
The thermostat 8 is designed to detect the temperature of the liquid 10 in the inner cylinder 2 through the wall surface of the inner cylinder 2.

A plug 12 is airtightly fitted into the opening 3 at the upper end of the outer cylinder 1 with a packing 11 interposed therebetween. The stopper 12 is provided with a liquid guide pipe 13 that extends downward into the inner cylinder 2, and an air passage 14 that passes through the stopper 12 in the vertical direction. The liquid guiding port 13a at the lower end of the liquid guiding pipe 13 extends to near the inner bottom surface of the inner cylinder 2, that is, to a position lower than the upper end of the heater 7, and the upper end passes through the water passage 15, the water stop mechanism 16, and the water injection pipe 17. It communicates with a spout 17a at the tip of the water injection pipe 17.

A lid 18 is provided above the stopper 12 and the pot body 6, and a bellows 19 is installed in the lid 18, and the bellows 19 is airtightly communicated with the ventilation path 14.
A pusher body 20 is provided above the bellows 19.

Here, a method of using pot A configured as described above will be explained. After the liquid is supplied to the inner cylinder 2 of the pot A, when the heater 7 is turned on to generate heat, the heat heats the liquid 10 in the inner cylinder 2 through the wall surface of the inner cylinder 2. A thermostat 8 detects the temperature of the heated liquid 10, and controls the supply of electricity to the heater 7 so as to keep the liquid temperature substantially constant. Next, when pouring out the liquid 10, the pusher 20
is pushed down to force the air in the bellows 19 into the inner cylinder 2 through the ventilation path 14. The pressure-fed air pushes the liquid 10, causing the liquid guide pipe 13 and the water passage 1 to
5. Spout 1 through water stop mechanism 16 and water injection pipe 17
A liquid 10 is poured out from 7a.

Further, as a conventional pot, a pot B as shown in FIGS. 4 and 5 is also provided. The configuration of this pot B will be explained with reference to FIGS. 4 and 5. If the configuration of pot B is the same as that of pot A shown in FIG. 3, the same reference numerals will be given to the constituent elements. First, the fourth
Reference numeral 1 in the figure is a metal outer cylinder, and an inner cylinder 2 with a bottom is provided inside the outer cylinder 1, and a gasket 2 is provided at the opening at the upper end of the outer cylinder 1.
An opening 22 at the upper end of the inner cylinder 2 is airtightly attached to the inner cylinder 2 through the opening 22 . A bottom plate 4 is attached to the lower end of the outer cylinder 1.
are attached in an airtight manner, and a vacuum layer is formed between the inner cylinder 2, the outer cylinder 1, and the bottom plate 4.

The outer cylinder 1 and the inner cylinder 2 constitute a pot body 6 that can store liquid therein and keep the liquid warm. A heater 7 is liquid-tightly attached to the inner bottom surface of the inner cylinder 2 via a gasket 23 so as to directly boil the liquid 10 within the inner cylinder 2. The configuration of the heater 7 will be explained with reference to FIG. 5. In the figure, reference numeral 24 is a disc-shaped upper plate;
A disk-shaped lower plate 25 is disposed below this upper plate 24, and a cylindrical portion 26 is provided downward in the center of this lower plate 25, and the upper plate 24 and the lower plate 25 are They are connected in a liquid-tight manner by winding around the periphery to form a case 27. Inside this case 27, two upper and lower disc-shaped spacers 28, 28 are arranged, and in the space between these two spacers 28, 28, a heating element ( (not shown) is stored. Cylindrical part 2 of lower plate 25
A cylindrical member 30 is disposed within the cylindrical member 6, and a flange 31 is formed at the upper end of the cylindrical member 30.
The cylindrical member 30 supports the case 27 by having its flange 31 fitted into a gap formed between the lower plate 25 and the lower spacer 28 .

As shown in FIG. 4, the opening 2 at the upper end of the inner cylinder 2
A stopper 12 is airtightly fitted to 2 through a packing 11. The stopper 12 is provided with a liquid guide pipe 13 that extends downward into the inner cylinder 2, and a ventilation passage 14 and a steam passage 32 that pass through the stopper 12 in the vertical direction. The liquid guide pipe 13 has a liquid guide port 13a at its lower end extended to near the inner bottom surface of the inner cylinder 2, that is, to a position lower than the upper end of the heater, and its upper end communicates with the spout via the water passage 15 and the water injection pipe 17. There is. Note that this spout is not shown.

A valve 33 is attached to the opening at the lower end of the ventilation passage 14 so as to close the opening from the outside, and when the valve 33 is opened, the opening at the lower end of the steam passage 32 is closed.

A lid 18 is provided above the stopper 12 and the pot body 6, and a bellows 19 is installed in the lid 18, and the bellows 19 is airtightly communicated with the ventilation path 14.
A pusher body 20 is provided above the bellows 19. Further, the lid body 18 is provided with a passage 34 communicating with the steam passage 32, and a thermostat 8 is embedded in the inner wall surface of this passage 34.

Here, a method of using pot B configured as described above will be explained. After supplying the liquid to the inner cylinder 2 of the pot B, when the heater 7 generates heat by applying electricity, the heat directly heats the liquid 10 in the inner cylinder 2. A thermostat 8 detects the vapor temperature of the heated liquid 10, and controls the supply of electricity to the heater 7 so as to keep the liquid temperature substantially constant. Next, when pouring out the liquid 10, the pushing body 20 is pushed down to forcefully feed the air in the bellows 19 into the inner cylinder 2 through the ventilation path 14 and the valve 33. This pressure-fed air pushes the liquid 10 and pours out the liquid 10 through the liquid guide pipe 13, the water passage 15, and the water injection pipe 17.

[Problem that the invention attempts to solve]

However, the former has the following problem. That is, as shown in FIG.
Each time the liquid is used, the liquid level decreases to the level of the liquid guide port 13a at the lower end of the liquid guide pipe 13, and the liquid 10 is no longer poured out from the pot A.
If the heater 7 is energized and generates heat in this state, the liquid level of the liquid 10 is below the upper end of the heater 7, so the liquid 10 is
It cannot exchange heat with 0 and becomes dry-cooked. If this dry cooking state continues, until the thermostat 8 detects the dry cooking state and turns off the power to the heater 7,
The pot body 6 changes color due to the heat from the heater 7, and the stopper 1
There are problems such as deformation of resin parts such as 2.

In the latter case, as shown in FIGS. 4 and 5, when the liquid level of the liquid 10 in the inner cylinder 2 falls to the position of the liquid guide port 13a, the entire heater 7 is exposed from the liquid 10. If the heater 7 is energized and generates heat in this state, the entire heater 7 will not be able to exchange heat with the liquid 10 and will be in an empty state. This dry cooking state is detected by the thermostat 8 and continues until the heater 7 is turned off. During this time, the pot body 6 of the pot B changes color, the resin parts such as the stopper 12 deform, and there are problems such as a fire.

[Means for solving problems]

This invention is based on the pot shown in Figures 4 and 5, in which the liquid guide port at the lower end of the liquid guide tube is extended to a lower position than the heat generating part, and the heat generating part is placed in a dish-shaped vessel. It is attached to a dish-shaped container filled with liquid so that the upper peripheral edge is higher than the upper end of the heat generating part.

[Effect]

In the present invention, even when the fluid in the inner cylinder dries up while the pot is energized, the heat generating part is still cooled by the remaining liquid stored in the dish-shaped vessel.

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is a diagram showing the configuration of a first embodiment of the present invention. The structure of this embodiment is almost the same as that of the conventional pot B shown in FIGS. 4 and 5, and the same components are denoted by the same reference numerals and the explanation of those parts will be omitted.

As shown in FIG.
The point is that a dish-shaped container, that is, a dish 35, is newly provided to cover the bottom and side surfaces of the machine. The dish 35 has a cylindrical shape with a bottom, and a circular opening is provided in the center of the bottom, and the opening is fitted into the outer peripheral surface of the cylindrical portion 26 of the heater 7, and has a gasket (not shown). They are fixed in a liquid-tight manner through the plate 35
The upper end is higher than the upper end of the heater 7.

Next, the operation of the pot shown in FIG. 1 will be explained.

Every time the liquid 10 in the inner cylinder 2 is used, it decreases.
When the liquid level drops to the position of the liquid guide port 13a, the dish 35 is exposed from the liquid 10. A liquid 10 is stored and remains in the dish 35, and the liquid 10 immerses the heater 7. At this time, even if the heater 7 has already been energized to generate heat, the liquid 10 cools the heater 7, so that no dry cooking occurs.

FIG. 2 is an enlarged sectional view of a main part showing a second embodiment of the present invention. The structure of this embodiment is almost the same as that of the conventional pot B shown in FIG. 5, and the same components are designated by the same reference numerals and the explanation of those parts will be omitted.

As shown in FIG. 2, the configuration of this embodiment differs from the configuration of pot B in that the shape of the case 27 of the heater 7 has been improved. That is, in this embodiment, the periphery of the case 27 is extended upward, the upper plate 24 and the lower plate 25 of the case 27 are cylindrical, and the cylindrical portion and flat plate portion of the upper plate 24 form a plate. A shaped vessel is formed.

Here, to explain the operation of the pot shown in FIG. 2, each time the liquid 10 in the inner cylinder 2 is used, when the liquid level drops to the position of the liquid introduction port 13a, the heater 7 turns the liquid 10 Be more exposed. The liquid 10 is stored and remains on the upper side of the case 27, and even if the heater 7 is already energized and generated to generate heat at this time, the liquid 10 cools the heater 7, so that an empty cooking state does not occur.

In the above embodiments, a metal vacuum insulated container is used as the container, which is made of a double cylindrical body with an inner and outer metal cylinder, and the space between the inner and outer cylinders is evacuated, but the present invention is not limited to this. Needless to say, it may have a single layer structure.

[Effect of idea]

As explained above, the present invention is shown in Figures 4 and 5.
In a pot as shown in the figure, the following excellent effects can be obtained by providing a heat generating part in a dish-shaped container filled with liquid.

In other words, in the present invention, when the liquid in the inner cylinder dries up while the heat-generating part of the pot is energized, at least a part of the heat-generating part is immersed in the fluid stored inside, so that the heat-generating part is cooled and It is possible to prevent the heating part from running dry.

[Brief explanation of the drawing]

Fig. 1 is a partially omitted vertical sectional view showing the first embodiment of the present invention, Fig. 2 is an enlarged sectional view of main parts showing the second embodiment of the invention, and Fig. 3 is the first conventional example. 4 is a partially omitted vertical sectional view showing a second conventional example, and FIG. 5 is an enlarged sectional view of the same essential part. 1... Outer cylinder (container), 2... Inner cylinder (container), 7...
...Heater (heat generating part), 13...Liquid guide pipe, 13a...
...liquid inlet, 35...dish (dish-shaped vessel).

Claims (1)

[Scope of Claim for Utility Model Registration] (1) In an electric water kettle, which has a bottomed cylindrical container that stores liquid and is provided with a heat generating part that heats the liquid stored in this container, the lower end of the liquid conduit The liquid introduction port is arranged to extend to a lower position than the heat generating part, and the heat generating part is attached to a dish-shaped container filled with liquid having a periphery extending upward from the upper end of the heat generating part. Electric kettle. (2) Claims for registration of a utility model characterized in that the container is a metal vacuum insulated container consisting of a double metal cylinder with an inner and outer cylinder, and the space between the inner and outer cylinders is evacuated. The electric kettle described in paragraph 1.