JPS612816A - electric heating pot - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an electric heating pot with a double vacuum container membrane made of metal for heating and keeping a contained liquid warm.

Conventional structure and its problems In recent years, electric heat insulation has been developed that uses a metal vacuum double container, which has excellent impact resistance, as a solution to the major drawback of the glass vacuum double bottle, which is that it is easily broken. Various pots have been proposed.These pots do not require various protective structures unlike glass vacuum double bottles, and effectively utilize the strength of metal double containers.

These use the outer container as it is as the exterior body, and a lid with a built-in well-known bellows type air pump is placed on the top of the inner and outer containers, and the lower part of the pump is equipped with a liquid lift pipe, a discharge pipe, and a liquid injection pipe. The inner stopper is placed tightly on the top of the container,
Further, the inner container has a single bottom portion that does not form a vacuum insulation space between it and the outer container, and is formed of a separate metal plate, and a band-shaped heating element is attached to the outer periphery of the single bottom portion. In addition, the liquid level display device for the stored liquid had a transparent display pipe on one side of the container that communicated with the inside of the container, and a protective cover was installed from the outside to protect the entire display pipe. .

However, since the display pipe usually needs to always show the same liquid level as the liquid level inside the container, the outside diameter of the pipe is also about 8IO1~10.
The distance from the outer surface of the outer container to the front of the protective cover protrudes considerably from the outer surface of the outer container due to parts such as the protective cover and the connecting tubes between the upper and lower pipes (in other words, the liquid level display device protrudes), and the appearance of the container is affected. It was a loss. In addition, when observing the liquid level from the outside, there is a certain distance from the top surface of the protective cover to the pipe, and as mentioned above, the pipe diameter is small, making it difficult to observe the liquid level from the outside. If the pipe were made thicker, it would protrude further from the exterior body, and the amount of liquid inside the pipe would also increase, which would increase heat loss to the outside.

OBJECTS OF THE INVENTION In order to eliminate the above-mentioned drawbacks, the present invention aims to provide an electric heating pot that has a simple structure, allows easy observation of the liquid level, and has a liquid level display device that does not impair the appearance of the container. It is something.

Structure of the Invention In order to achieve the above object, the electric heating pot of the present invention is provided with a flat curvature tube whose outside is transparent at least on the outside of a metal vacuum double container, and a protective cover is provided from the outside of this curvature tube. The configuration facilitates observation of the liquid level without compromising appearance.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 2, reference numeral 1 denotes a heat transfer plate with good thermal conductivity whose central portion protrudes upward, and its outer peripheral portion is fixed to the lower part of the stainless steel inner container 2 in a liquid-tight manner by base metal welding or the like. Reference numeral 3 denotes an outer container made of stainless steel which also serves as an exterior body, and a vacuum insulation space 5 is provided between the inner container 2 and the outer container 3.

A pouring spout 6 is mounted and connected to the upper part of the inner and outer containers 2 and 3, and a lid 8 is rotatably mounted on the upper part of the pouring spout 6 by holding a presser body 7.
is mounted, and the spout 7 and lid 8 form a protrusion toward the front of the vessel and are overlapped with each other.

A mounting cover 9 is attached to the lower part of the spout protrusion,
The discharge pipe 10 is locked. Furthermore, a well-known bellows type air pump 11 is built into the lid part 8, and an inner stopper 14 having a liquid lift pipe 12 and a discharge pipe 13 is placed in close contact with the upper part of the inner and outer containers at the bottom of the pump. There is. Outlet pipe 1
The ends of 3 are connected and extended by a liquid injection pipe 16, and the tip of the liquid injection pipe 16 is bent and placed opposite the discharge pipe 10.

The heat transfer plate 1 is a heat-generating plate 16 wrapped with heating wires and insulating plates 17 and 18 laminated on the top and bottom, which are inserted from below. Note that each of these members has a through hole in the center, and the whole is crimped with a metal heat diffusion plate 19 having good thermal conductivity and a backing material 2o having a through hole in the center to form a heating element. 1a is formed. A heat shield plate 21 is provided below the heating element portion 1a, and a temperature controller 22 is installed below the center of the heat transfer plate 1 by a mounting spring 23 (not shown).

Further, a hakama portion 24 and a back plate 25 are attached to the lower portions of the inner and outer containers.

On the protruding side of the spout 6 and on one side of the outer container 3 (the front part of the container body), a flat curvature tube 26, which is the main part of a liquid level display device made of transparent resin, is erected. . This flat curvature tube 2
6V'i, two flat plates 26a.

26b is sealed all around so that the inside is hollow,
A guide pipe portion 26c is provided in the lower part, a ball 27 having a specific gravity of 1 or less is contained in the upper part, and an air hole 26d is provided in the part facing the ball 27.

In addition, the curvature is approximately the same as the outer diameter of the outer container 3, and at the same time, it is protected by a metal protective cover 28 provided with a cutout window 28a, which is provided at the lower part of the spout protrusion and the hakama part 24. The end face of the protruding portion is engaged with the end face of the outer container 3 and is closely attached to the side face of the outer container 3. Note that an elbow 29 is attached to the guide pipe of the flat curved tube 26, and the vertical tube 3 provided on the outer periphery of the heat exchanger plate 1
0 is communicated with the inside of the container to form the entire liquid volume device.

It should be noted that the dimension of the cavity on the side of the body protrusion is made as small as permissible.

Hereinafter, the operation according to the configuration described in (G) will be described. When a liquid is stored in the inner container 2 and electricity is started, the valve heating element 1a is heated and heat is transferred to the liquid through the heat transfer plate 1. At the same time as this heat transfer, heat is diffused toward the outer periphery of the inner container 2 through the heat diffusion plate 19 and the backing material 20, which are made of all the elements having good thermal conductivity.

The heat transferred to the backing material 20 then heats the liquid. When the liquid reaches a certain temperature by heating, the temperature controller 22 attached to the central convex portion of the heat exchanger plate 1 is activated to move to the heat retention stage. The contained liquid enters the cavity of the flat curved tube 26 through the elbow 29 and the guide pipe,
The same liquid level as in the inner container 2 is shown. During use, when the liquid is taken out to the outside using the air pressure feeding means, the hole 2 in the liquid level display device is moved upward by the air pressure and the liquid, sealing the air vent hole 26d, and discharging the liquid to the outside. It also prevents the outflow of water.

Here, the water level line in the flat curved pipe 26 is formed at slightly higher water levels on both the left and right sides due to the surface tension of the liquid, but the cutout window 28a of the protective cover 28 is provided at the center where the water level is straight. Therefore, when observing from the outside, only the central horizontal part of the liquid is visible. In addition, experimentally, it was possible to obtain a horizontal section of about 25 m in a curvature tube made of polycarbonate resin, with the dimension of the protruding side of the hollow part set to 2 cm, and the arc direction set to 40 cm. In addition to obtaining extremely good results when observing the liquid level from the outside,
The protrusion of the entire liquid volume device toward the front of the container body is made extremely small, and the entire container body is simplified.
Since the entire liquid volume device is locked and connected with just one screw, assembly is extremely easy.Furthermore, the amount of liquid used for the display unit is extremely small compared to the overall size of the display unit. This allows the prevention of heat loss to be reduced.

Effects of the Invention As described above, according to the present invention, even if it is a double vacuum container made of metal, it is extremely easy to assemble and observe the liquid level, and the protrusion toward the front of the container can be reduced, making it possible to create a non-pull electric heating pot. It is something that can be provided.

[Brief explanation of the drawing]

Fig. 1 is a front view of an electric heating pot showing an embodiment of the present invention, Fig. 2 is a sectional view of Fig. 1, Fig. 3 is a perspective view of main parts of the electric heating pot, and Fig. 4 is a front view of an electric heating pot showing an embodiment of the present invention. FIG. 3 is a cross-sectional view of a heating element of a heat-retaining bond. 2 - Inner container, 3... Outer container, 26 - Curvature tube, 2
8a - Cutout window. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure θ Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] A vacuum double container is formed by a metal outer container that also serves as an exterior body and an inner container, and on one side of the outer container there is a flat curved tube whose lower part communicates with the bottom of the inner container and whose outer part is at least partially transparent. An electric heat-retaining pot that stands close to each other and has a metal cover with a display window that covers this curved tube.