JP2002325684A - Electric vessel for keeping hot water with vacuum, double-layered vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve thermal performance and to save energy. SOLUTION: A vacuum, double-layered vessel 3 made of a metal is used for a container 1. A heater 11 is applied to a one-layered bottom 3c from the outside. To form a squeezed-shaped, mouth 3a with a smaller inner diameter than that of the body of the vacuum, double-layered vessel 3, the area of the opening of the mouth 3a needs to be the same as or smaller than that of the heater 11, and/or the area of the opening of the mouth 3a needs to be the same as or smaller than that of the one-layered bottom 3c.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric hot water storage container having a vacuum double container made of metal, and is used, for example, for a household electric pot.

[0002]

2. Description of the Related Art Electric pots are widely used in homes, offices, cafeterias, and the like, and are sometimes in use all the time.
On the other hand, as energy conservation is called out in terms of environmental issues and resource saving, high power consumption by heaters in electric pots has been targeted for improvement.

Therefore, an electric pot having a vacuum double container a made of metal as shown in FIG. 17 has conventionally been provided. The power consumption of the heater c when the heated content liquid is kept at a predetermined temperature is reduced.

In the conventional electric pot shown in FIG. 17, a narrowed portion f in which an inner cylinder e extends inward at a mouth portion d of a vacuum double container a, and a vacuum space b of a body portion are wrapped around a bottom portion. And an outer case h containing such a vacuum double container a to form a container i, and an opening communicating with an opening d of the vacuum double container a in the container i. j is provided with a cover k which covers it and extends to the mouth d of the vacuum double container a. This makes it possible to secure a medium temperature keeping state of about 90 ° C., which can withstand practical use even when two hours have elapsed after the heating by the heater c is stopped after boiling.

[0005]

However, while the heat retaining mode in which the heating by the heater c is not performed is put to practical use, it is desired to further improve the heat retaining power. Thus, the present inventors have repeatedly conducted various experiments and studied repeatedly. As a result, it was found that the larger the area of the vacuum space b around the vacuum double container a, the higher the heat retention effect. The preferred contact area of the container a with the single bottom is substantially constant as shown in FIG. 17 in relation to the body diameter of the vacuum double container a, and the heat of the content liquid is closed by the lid k. Even in the electric pot shown in FIG. 17, for example, due to the relationship between the opening d and the heater c, heat is easily radiated to the area when the content liquid is heated in the electric pot shown in FIG. It was found that the area was larger, and further improvements in the heat retention were found.

[0006] An object of the present invention is to provide an electric hot water storage container having a vacuum double container capable of further improving the heat retaining power and saving energy based on the above findings.

[0007]

Means for Solving the Problems To achieve the above object, an electric hot water storage container having a vacuum double container according to the present invention comprises:
A vacuum double container made of metal in the body, a heater is applied to the single bottom of this vacuum double container from the outside, and a vacuum-shaped opening with an inner diameter smaller than the body is formed in the vacuum double container. In one aspect of the present invention, the opening of the mouth and the heater satisfy a relationship that the opening area of the mouth is substantially equal to or smaller than the area of the heater.

In such a configuration, since the vacuum double container is made of a metal having both high bending rigidity and high strength, the wall thickness and the vacuum space layer are small and slim. Since the area where heat can easily escape due to the opening of the mouth of the vacuum double container is substantially equal to or smaller than the area where the content liquid in which the heater is in contact with the single bottom of the vacuum double container is heated, The heat of the content liquid is harder to escape than in the conventional case where the area of the content liquid is larger than the area where the content liquid is heated, and the heat retaining power is further improved by the amount of the heat that hardly escapes, so that further energy saving can be achieved.

The electric hot water storage container having the vacuum double container of the present invention also has a metal vacuum double container in its body, and a heater is applied to the single bottom of the vacuum double container from outside.
In a vacuum double container having a vacuum double container in which the inner diameter is smaller than the body portion in the shape of a throttle, a wraparound portion of the vacuum space from the body portion is provided on the outer periphery of the single bottom portion,
Another feature is that the single bottom and the mouth inside the wraparound portion of the vacuum space satisfy the relationship that the opening area of the mouth is substantially equal to or smaller than the area of the single bottom. I have.

In such a configuration, since the vacuum double container is made of a metal having both high bending rigidity and strength, the wall thickness and the vacuum space layer are small and slim. Since the opening area of the mouth of the vacuum double container is reduced to about the area of the single bottom to which the heater is applied, the heat of the content liquid is harder to escape than in the conventional case that was larger than the area of the single bottom, Heat retention is further improved by the amount of heat that has become difficult to escape, and further energy savings can be achieved.

In each of the above inventions, the outer diameter of the mouth of the metal vacuum double container is smaller than the body diameter of the outer cylinder forming the vacuum double container. By making use of the smaller size, the outer diameter can be reduced to reduce the volume around the mouth, contributing to further downsizing of the body. When the outer diameter of the mouth of the vacuum double container is smaller than the body diameter of the inner cylinder, the volume around the mouth can be further reduced.

In each of the inventions for reducing the outer diameter of the mouth portion, the joint between the mouth portion of the inner cylinder and the mouth portion of the outer cylinder forming the vacuum double container may further include a joint of the vacuum double container. In the configuration that is located on the outer diameter side of the opening end of the portion, the aperture shape of the opening that reduces the inner diameter of the opening together with the outer diameter is shared by the inner cylinder and the outer cylinder, and one of the inner and outer cylinders Since the drawing shape is not concentrated, it is easy to work, which is advantageous in terms of material and working work, and can reduce cost.

[0013] In each of the above-described inventions for reducing the outer diameter of the mouth, an annular space formed around the mouth between the outer diameter of the mouth and the outer diameter of the body of the vacuum double container is further utilized. In the configuration in which the shoulder portion of the vacuum double container is formed to cover the shoulder portion of the vacuum double container and form an opening of the body communicating with the mouth thereof, and a mounting portion for the vacuum double container is provided, the shoulder portion of the metal vacuum double container is provided. In order to attach a shoulder member that is easy to give the required shape around the opening of the container that is arranged and communicates with the mouth of the vacuum double container, the attachment part between the shoulder member and the vacuum double container is attached to the body of the vacuum double container. It is provided by using an annular space around the mouth between the outside diameter of the mouth and the outside diameter of the mouth, so there is no need for a special space for the mounting part, so the body does not become bulky and there is enough space around the mouth Easy to bulky with necessary mounting strength and seal part Or provided, it is suitable for hotel what other needs.

A lid for opening and closing an opening of a vessel communicating with the mouth by utilizing an annular space formed around the mouth between the outer diameter of the mouth and the outer diameter of the body of the vacuum double container. In the configuration provided with a connecting portion for hingedly opening and closing the body so that the lid that covers the opening of the body connected to the mouth of the metal vacuum double container is hingedly connected to the body so that it can be opened and closed. However, since the connecting portion of the container is provided using an annular space formed around the mouth between the outer diameter of the body and the outer diameter of the mouth of the vacuum double container, the connecting portion for hinge-connecting the lid is provided. No special space is required, the body does not become bulky, there is room for the space around the mouth, and there is a complicated and bulky connecting part such as a movable part for attaching and detaching the lid, and other necessary things are installed It is suitable to do. Due to the complicated and bulky connecting portion, it is easy to make the connecting portion which does not protrude from the outer surface of the conventional container body easy, and the appearance can be simplified.

A cover for covering the opening of the container communicating with the mouth of the vacuum double container is hinged to the shoulder of the container so as to be openable and closable, and the cover has an entrance portion into the mouth of the vacuum double container. When the mouth is at the closest position to the envelope drawn by the entrance when the lid is opened and closed, a part of the lid is used as an entrance to enter the mouth of the vacuum double container. While preventing the escape of heat through the part and increasing the heat retention, the swelling to the outside of the body can be suppressed while securing the capacity required for the lid by providing a steam passage and housing a manual pump, etc. Since the mouth of each invention having the reduced inner diameter of the vacuum double container is immediately adjacent to the envelope drawn by the outline of the entrance portion when the lid is opened and closed, the inner diameter is reduced to the limit as far as it does not hinder the opening and closing of the lid. Heat can be made more difficult to escape.

In each of the above-mentioned inventions, further, in the constitution in which the container is accommodated in a vacuum double container in an outer case,
Since the space between the outer case and the outer case itself has two heat insulating layers around the outside of the vacuum double container,
Further, the heat retaining power is improved, and the space between the vacuum double container and the outer case is suitable for accommodating the discharge means for the content liquid, the control board, the power supply board, and the like.

If the apparatus is provided with an electric pump or a manual pump for discharging the liquid content in the vacuum double container to the outside through the discharge path, it is possible to discharge and use the liquid content while keeping the electric hot water storage container stationary. It is suitable for large types that have recently become large and are difficult to lift, especially when a manual pump is provided. It is suitable for energy saving and use where there is no power supply.

Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as far as possible.

[0019]

FIG. 1 to FIG. 16 show an embodiment of the present invention.
The present invention will be described in detail with reference to FIGS.

The present embodiment is an example of a household electric pot, and has a basic structure in which a vacuum double container made of stainless steel is housed in an outer case. However, the present invention is not limited to this, and the use, the material of the vacuum double container, and the presence or absence of the outer case can be freely selected.
However, stainless steel has low thermal conductivity among metals,
Moreover, since it has sufficient bending rigidity and strength and has a rust-preventing effect, it is suitable for an electric hot water storage container for beverages.

As shown in FIG. 1, the electric pot of this embodiment is a metal vacuum double container 3 composed of a stainless steel inner cylinder 4 and an outer cylinder 5, and a liquid in the inner cylinder 4. A heater 11 applied to the single bottom 3c of the vacuum double container 3 so as to heat the outer case 2 made of synthetic resin.
To form a vessel 1. As described above, since the vacuum double container 3 is made of a metal having high bending rigidity and high strength, the wall thickness and the layer of the vacuum space 63 are small and slim, while exhibiting a high heat retaining power in combination with the material. . However, the vacuum double container 3 may be configured such that its body is exposed to the outside to form the container 1. A discharge path 25 for discharging the content liquid to the outside of the container 1 is connected to the single bottom portion 3c of the vacuum double container 3, and the discharge path 25 rises between the vacuum double container 3 and the outer case 2 to form the container. The discharge port 25d faces the front part of No. 1. An electric pump 26 is provided in the middle of the discharge path 25 so that the content liquid can be discharged electrically. At the same time, a manual bellows pump 50 is provided on the lid 13 that covers the opening 12 of the container 1 communicating with the mouth 3a of the vacuum double container 3 so that the opening 12 can be opened and closed. Pressurized air is blown into the inside 3 to pressurize the content liquid, which is extruded through the discharge path 25 and discharged to the outside.

The rising portion 25a of the discharge path 25 is a transparent tube, and the liquid amount there is set in the liquid amount display window 6 shown in FIG.
2 so that you can see through. However, the liquid amount of the content liquid can be detected and displayed stepwise by a photocoupler or the like in the rising portion 25a, and used as liquid amount data for various controls. Further, the automatic detection of the liquid amount may be performed by a capacitance method,
The liquid amount can also be automatically detected based on the temperature rise characteristics when heating in step 1 and the temperature decrease characteristics when heating of the heater 11 is stopped.

In order to form a narrowed opening 3a having an inner diameter smaller than that of the body in the vacuum double container 3, the opening of the opening 3a and the heater 11 are formed so that the opening area of the opening 3a is the heater 11 Satisfies the relationship of being approximately equal to or less than the area of As described above, the area where heat can easily escape due to the opening of the opening 3a of the vacuum double container 3 is substantially equal to the area where the content liquid in which the heater 11 is in contact with the single bottom 3c of the vacuum double container 3 is heated. By being equal or less,
The heat of the content liquid is harder to escape than in the conventional case where the area of the content liquid is larger than the area where the content liquid is heated, and the heat retaining power is further improved by the amount of the heat that hardly escapes, thereby further saving energy.

In addition, the outer periphery of the single bottom 3c of the vacuum double container 3 is provided with a vacuum space 6 from the body 3b.
3 is provided, and the single bottom 3c inside the wraparound portion 63a and the mouth 3a are connected to the mouth 3a.
Is smaller than the area of the single bottom 3c. Thus, the mouth 3 of the vacuum double container 3
a is the single bottom 3 to which the heater 11 is applied.
When the area becomes smaller than the area of c, the heat of the content liquid is harder to escape than in the conventional case where the area is larger than the area of the single bottom portion 3c, and the heat retaining power is further improved by the amount of the heat that hardly escapes, thereby further saving energy. .

Further, as shown in FIG.
If the outer diameter of the opening 3a is smaller than the body diameter of the outer cylinder 5 forming the vacuum double container 3, the outer diameter is reduced by utilizing the reduced inner diameter of the opening 3a. The volume around the mouth 3a can be reduced, which contributes to further downsizing of the body 1. In this embodiment, in particular, the mouth 3 of the vacuum double container 3 is used.
The outer diameter of “a” is smaller than the body diameter of the inner cylinder 4. Thereby, the volume around the mouth 3a can be further reduced.

It is preferable that the inner diameter of the mouth 3a is set to a size which can be obtained by an adult and can provide a visual field range θ as shown in FIG. 2 where the full water level indicator 67a can be seen.
The inside diameter that can be reached by an adult person is about 80 cm or more.
It is preferable that the visual field range θ includes the position of the eyes when performing an operation while viewing the operation panel 32. In the illustrated embodiment, a full water level indicator 67a is formed as an embossed line on an embossed wall 4n in which a part of the body 4m of the inner cylinder 4 is embossed inward, thereby satisfying the view range θ. Moreover, the water level indicator 6
An upward arrow 67b below the full water level indicator 67a, which is easier to see than 7a, and a character display 67c that indicates that there is a full water level indicator 67a in the direction of the arrow 67b.
Is formed, and it is easy for the user to protect water from exceeding the full water level. In particular, in a design in which the full water level is sufficiently smaller than the body diameter of the vacuum double container 3, even if the inner diameter of the mouth 3a is set to be substantially the same as or smaller than the full water level, heat can escape from the mouth 3a. It is easy to suppress and the heat retention is improved.

In this embodiment in which the outer diameter of the mouth 3a is reduced, the mouth 4a of the inner cylinder 4 and the mouth 5a of the outer cylinder 5 forming the vacuum double container 3 are further joined. Part 64
However, as shown in FIG. 1 to FIG.
Are located on the outer diameter side of the open end of the. This allows
The inner tube 4 and the outer tube 5 share the aperture shape of the mouth 3a, which reduces the inner diameter of the mouth 3a together with the outer diameter, so that the inner and outer tubes 4,
Since the shape of the drawing is not concentrated on one of the surfaces 5, it is easy to work, which is advantageous in terms of material and working work, and can reduce costs. Both inner and outer cylinders 4 and 5 are JIS SUS30
4. It can be manufactured without any problem using SUS436 or the like.

As the outer diameter of the opening 3a is reduced, an annular space 65 is formed around the opening 3a between the outer diameter of the opening 3a and the outer diameter of the body 3b of the vacuum double container 3. Utilizing the shoulder member 6 and the vacuum double container 3 as shown in FIGS.
Is provided. Thus, the shoulder member 6 is attached to the shoulder portion 3d of the metal vacuum double container 3 to attach the shoulder member 6 which is easy to give a required shape around the opening 12 of the container 1 communicating with the mouth 3a. And the vacuum double container 3 are provided by utilizing the annular space 65 formed around the mouth 3a between the outer diameter of the body and the outer diameter of the mouth of the vacuum double container 3. A special space is not required, the body 1 does not become bulky, a space can be provided around the mouth 3a, and a mounting portion 66 which is easily bulky, such as having a necessary mounting strength and a seal portion, is provided.
It is suitable for installing other necessary components.

In the illustrated example, the shoulder 3d of the vacuum double container 3
Are provided at several places in the circumferential direction by welding or the like as shown in FIGS.
A mounting flange 6a on the inner periphery of the shoulder member 6 is applied to 1 and a washer ring 75 made of metal and having an L-shaped cross section is applied thereto. A screw 72 is passed from the washer ring 75 side to the mounting bracket 71. Screwed. This screwing can be achieved with a simple shape for both the mounting bracket 71 and the shoulder member 6 because the shoulder 3d is horizontal.

The screwing portion of the shoulder member 6 is covered and covered by a synthetic resin shoulder ring 73 fitted to the inner peripheral surface 6b integrally forming the mounting flange 6a of the shoulder member 6. The shoulder ring 73 has hook pieces 73c extending downward at several places in the circumferential direction as shown in FIG. 14, and these hook pieces 73c are attached to the washer ring 7 as shown in FIG.
3 and holes 75a, 6a formed in the mounting flange 6a.
d is inserted from above and is prevented from coming off by elastically engaging with the opening edge of the hole 6d at the final insertion position. The shoulder ring 73 is a seal member 7 fitted in the outer peripheral groove 73a.
4 presses against the inner peripheral surface 6b of the shoulder member 6 to seal the gap between them. Also, as shown in FIGS. 3 and 4, the shoulder ring 73 has an inner circumference that is the inner cylinder 4 at the mouth 3 a of the vacuum double container 3.
And, it has a hook-shaped cross section over the joint 64 of the outer cylinder 5 and is sealed by a seal member 77 sandwiching the both. The sealing member 77 is a joint 64 between the inner and outer cylinders 4 and 5.
The inner peripheral sides are fitted into the mouth portions 4a and 5a.

Also, as shown in FIGS. 1 and 2, the annular space 65 is used to open the opening 12 of the vessel 1 communicating with the mouth 3a.
There is provided a connecting portion 15 for hinge-connecting so that the lid 13 for opening and closing can be opened and closed to the body 1. As described above, by providing the connecting portion 15 of the body 1 using the annular space 65, a special space for the connecting portion 15 for hinge-connecting the lid 13 becomes unnecessary, so that the body 1 does not become bulky and the mouth portion does not become large. It is suitable for providing a complicated and bulky connecting portion 15 such as having a stopper 68 which is a movable portion for attaching and detaching the lid 13 or providing other necessary components together with a space around 3a. Conventionally, as shown in FIG. 17 due to a complicated and bulky connecting portion, the connecting portion does not protrude from the outer portion of the body 1 as shown by a solid line in FIG. The portion 15 can be easily formed, and the appearance can be simplified.

In the example shown, the stopper 68 is urged upward by a spring 69 as shown in FIG.
5, the horizontal opening 171a of the concave portion 171 fitted with the hinge pin 16 is always closed. This allows
Even if the lid 13 is set to the open position where it is removed from the opening 3a and the opening 12 of the body 1 and the hinge pin 16 is moved so as to be pulled out from the recess 171, the hinge pin 16 is caught by the stopper 68 and the recess 171 is caught. Can't get out of In order to remove the lid 13, it is necessary to open the opening 171a of the recess 171 by moving the stopper 68 downward against the spring 69 by the operating portion 68a. This prevents the lid 13 from being accidentally detached.

As shown in FIG. 2, the lid 13 has an entrance 13a into the mouth 3a of the vacuum double container 3, and the mouth 3a
Is located at a position closest to the envelope 78 drawn by the entrance portion 13a when the lid 13 is opened and closed. In this way, by making a part of the lid 13 enter the mouth 3a of the vacuum double container 3 as the entrance 13a, the mouth 3a
At the same time as preventing heat from escaping from the air, increasing the heat retention, and at the same time, the steam passage 17 and the bellows pump 5 which is a manual pump.
The bulge to the outside of the body 1 can be suppressed while sufficiently securing a large capacity necessary for the lid 13 by housing 0.
Moreover, since the opening 3a of the vacuum double container 3 whose inner diameter is reduced as described above is located immediately near the envelope 78 that outlines the entrance portion 13a when the lid 13 is opened and closed, it does not hinder the opening and closing of the lid 13. It is possible to reduce the inner diameter to the maximum limit, thereby making it more difficult for heat to escape.

In addition, a seal member 122 is provided around the base of the entrance 13a of the lid 13 and sandwiched between the lid 13 and a metal inner lid 121 applied to the entrance 13a. And the mouth portion 3a is closed by pressing against the innermost diameter portion. Thereby, the air located in the safety space for preventing the content liquid from closing the inner opening 17a of the steam passage 17 between the full water level and the entrance 13a is greatly spread to the outside more than the mouth 3a, and the heat is easily released. As a result, the heat retention is improved.

Further, in the configuration in which the vessel 1 accommodates the vacuum double container 3 in the external case 2, the space 79 between the vacuum double container 3 and the external case 2 and the external case 2 itself are provided. Since two heat insulating layers are formed, the heat retaining power is further improved. According to an experiment by the present inventors, in a thermos bottle keeping state in which the content liquid was boiled and left standing for 2 hours without energizing the heater 11, the temperature of the content liquid was 95 ° C.
A moderately high warming temperature was obtained. Then, when it was left to stand at a medium warming temperature of about 90 ° C. which can withstand practical use, it took about 2 hours and 40 minutes since the thermos kept warm. This saves about 7,000 yen compared to about 6,500 yen in the past year. Further, the space 79 between the vacuum double container 3 and the outer case 2 is suitable for accommodating the discharge path 25 and the electric pump 26 as the liquid discharging means, the control board 27, the power supply board, and the like.

Further, if at least one of the electric pump 26 and the manual pump such as the bellows pump 50 is provided, the liquid content can be discharged and used while the electric hot water storage container is kept stationary. It is suitable for large types that are difficult. In particular, when a manual pump is provided, the liquid content can be discharged without being energized at the time of use in a warm state in which the heater 11 is not heated,
It is suitable for energy saving and use where there is no power supply.

More specifically, as shown in FIG. 2, the inner cylinder 4 is connected to the small-diameter mouth 3a by a diaphragm-shaped surface 4b rising slightly above the water level line 67 in the body 4m and obliquely inward. From here, the straight inner surface 4c of the mouth 3a is formed, and then the opening end face 3a1 of the mouth 3a, which is slightly obliquely upward, is formed to form a welded joint 6 with the outer cylinder 5.
4 has been reached. The outer cylinder 5 is the inner cylinder 4 at the body 5m.
Of the diaphragm-shaped surface 4b, the diaphragm-shaped surface 5b rising gradually inward from the position substantially corresponding to the rising start point of the diaphragm-shaped surface 4b, and then at the horizontal position substantially corresponding to the rising end point of the diaphragm-shaped surface 4b. Connected to the shoulder 3d,
From this, it rises straight and reaches the welded joint 64 with the inner cylinder 4.

The inner cylinder 4 has a body 4 m as shown in FIG.
A small inward flange 4e is formed at the lower end, and is formed into a container shape by integration with a welded portion 80 with a circular bottom plate 81. A horizontal portion 4 is formed on the bottom of the container-shaped inner cylinder 4 formed in this manner from the outer peripheral side toward the center.
f, a gentle downward slope 4g, a horizontal part 4h, a steep downward slope 4i, and a central horizontal part 4j. On the other hand, the outer cylinder 5 has an inward flange 5c formed at the lower end of the body 5m as shown in FIG. 10, and a horizontal bottom ring 5d extending from the flange 5c to the outer periphery of the central horizontal portion 4j of the inner cylinder 4. Are integrated with a welded joint 90, and the inner periphery of the bottom ring 5 d is integrated with a welded joint 80 with the central horizontal portion 4 j of the inner cylinder 4. The bottom ring 5d is formed by bending two annular reinforcing beads 5g.
As shown in FIG. 3, the inner reinforcing bead 5g engages with the steeply downwardly inclined portion 4i of the inner cylinder 4, thereby forming the bottom ring 5d.
The bottom of the inner and outer cylinders 4 and 5 can be positioned at the time of welding and joining with the central horizontal portion 4j.

As a result, a space extending from the body to the space between the bottom ring 5d of the outer cylinder 5 and the bottom of the inner cylinder 4 is formed. That is, when the vacuum space 63 is formed, it becomes the wraparound portion 63a of the vacuum space 63. The central horizontal portion 4j of the inner cylinder 4 has a single bottom 3c on the inner side from the welded joint 80 with the bottom ring 5d of the outer cylinder 5, and the heater 11 is applied to the inner bottom 4c so that the liquid contained in the inner cylinder 4 can be efficiently used. Although the heating can be performed well, in this embodiment, a portion of the central horizontal portion 4j to which the heater 11 is applied is formed as a downward concave portion 3e which is depressed upward, and the position of the heater 11 is reduced by the depth of the concave portion 3e. It protrudes to the content liquid side, and the contact area with the content liquid in the installation area of the heater 11 increases, thereby improving the heating efficiency.

An upward concave portion 84 is formed annularly between the protrusion of the concave portion 3e into the inner cylinder 4 and the wraparound portion 63a, and the content liquid discharged through the discharge path 25 is filled in the concave portion 84. The inflow end 25e of the discharge passage 25 is appropriately protruded so as to be left somewhat. As a result, the content liquid remains without being discharged by an amount corresponding to the inflow end 25e protruding into the inner cylinder 4, thereby preventing the empty firing. In the embodiment shown in FIGS. 1 to 15, the inflow end 25 e of the discharge passage 25 is connected to the widened extension 84 a of the recess 84. As shown in FIG. 5, when the extended portion 84a is formed by eccentrically forming the circular concave portion 3e, the area of the heater 11 does not decrease, so that the heating efficiency does not decrease. The extended portion 84a may be formed by cutting out a part of the circular concave portion 3e as shown by a solid line or a virtual line in FIG. 6, and in this case, the area of the heater 11 is reduced by the cutout. However, the proportion is small.

At the back of the heater 11 applied to the single bottom 3c, a metal heat shield plate 87 is provided, which is welded to the outer surface of the recessed portion 3e and the space around the vacuum space of the vacuum double container 3. 1, 8, and 13 attached to several places in the circumferential direction with screws 89, and a metal backup plate 92 and a spring are provided between the heat shield plate 87 and the heater 11. The member 91 is sandwiched and the spring member 9
The heater 11 presses the heater 11 against the single bottom 3c to make the heater 11 adhere closely. Further, a double structure portion in which the inner and outer cylinders 4 and 5 serving as the welded joints are in contact with each other is located at the fitting portion of the heater 11 and the bottom of the concave portion 84. Note that the same mounting bracket 88 at the bottom and the mounting bracket 71 at the shoulder are employed.

The outer cylinder 5 has an opening 5 extending from the portion of the drawing-shaped surface 5b to the joint 64 with the inner cylinder 4 via the shoulder 3d.
The area a is a separate member 83 independent of the body side, and a welded joint 85 is provided between the body side and the outward flanges 5e, 5f. By performing the welding and joining of the separate member 83 last, the container-shaped inner cylinder 4 and the outer cylinder 5 having no separate member 83 are fitted to each other to perform the welding of the bottom portion.
, A double container structure in which the inner and outer cylinders 4 and 5 having the drawn surfaces 4b and 5b are combined with both the inner and outer cylinders 4 and 5 is realized. In addition, it goes without saying that the throttle-shaped portion of the inner cylinder 4 may also be a separate member.

The vacuum space 63 between the inner and outer cylinders 4 and 5 is formed in the inner and outer cylinders 4 and 5 where welding has been completed, as shown in FIG. Hole 1
It is formed by evacuating through 01 and sealing with a sealing material. The evacuation is performed in a heating furnace in a vacuum state. In the vacuum space 63, one or more getters 102 as shown in FIG.
The gas generated over time in the chamber 3 is absorbed so that the degree of vacuum in the vacuum space 63 is not reduced.

The lid 13 is formed with a vapor passage 17 for letting the vapor from the vacuum double container 3 escape to the outside. The lid 13 has an inner opening 17a at a position facing the inside of the vacuum double container 3 and an outer surface exposed to the outside. It communicates with the formed outer opening 17b. In the middle of the steam passage 17, a safety path 17c is provided for temporarily storing or bypassing the content liquid when the container body 1 rolls over and enters, thereby delaying the liquid from reaching the outer opening 17b. This makes it possible to take measures such as raising the container 1 before the container 1 rolls over and the content liquid flows out through the vapor passage 17 to the outside. Further, in the steam passage 17, when the body 1 rolls over, a water stop valve 18 at the time of overturning, which works by its own weight or the like so as to try to enter the steam passage 17 or to prevent the entered liquid from proceeding ahead, is provided in place. Is provided. In the illustrated embodiment, it is provided at one location just inside the inner opening 17a.

A lock member 21 is provided at the front of the lid 13 to engage with the locking portion 19 on the shoulder member 6 side in the closed position to lock the lid 13 in the closed position. When the lid 13 is closed, The spring 22 always projects to the locked position by the bias of the spring 22 so as to automatically engage with the locking portion 19. Correspondingly, the lid 13 is provided with a lock release member 23 for retreating the lock member 21 to release the lock. As shown in FIG. 1, the lock releasing member 23 is of a lever type pivotally supported on the lid 13 by a shaft 24, and the front end 23a is depressed with a thumb or the like and rotated counterclockwise to turn the lock member 21 into a spring. The unlocked lid 13 can be lifted and opened by pulling up the rear end 23b raised by the unlocking operation with another finger to retract the unlocked lid 13 by retracting it against the lock 22.

The electric pump 26 is a centrifugal pump and is provided immediately below the vacuum double container 3.
The content liquid flowing from the inside is sent to the discharge port 25d facing the outside of the body 1 through the discharge path 25, and is discharged from the discharge port 25d to the outside for use.

In the space between the bottom 2 a of the outer case 2 and the bottom of the vacuum double container 3, together with the electric pump 26,
Control board 2 for controlling the power supply to heater 11 and electric pump 26
7 is installed. In the illustrated embodiment, the circuit box 28 is provided integrally with an opening at the bottom of the outer case 2. The circuit box 28 is provided with a lid 160 which opens downward and closes it. A temperature sensor 29 is applied to the center of the single bottom 3c of the vacuum double container 3 from below, detects the temperature of the content liquid at each time, and controls the temperature when heating and controlling the content liquid in a water heating or heat retention mode. get information.

An operation panel 32 is provided on the upper surface of a beak-like projecting portion 31 protruding from the front of the shoulder member 6 of the body 1 to operate a mode setting or the like, display corresponding to the operation, or operating state. Is displayed. An operation board 33 for transmitting and receiving signals corresponding to the operations and displays is provided below, that is, inside, the operation panel 32, and can be operated from outside or displayed to the outside in cooperation with the operation panel 32. To do. The upper part of the discharge path 25 is the container 1
An inverted U-shaped unit 25c is formed by a portion inserted between the projecting portion 31 of the outer case 2 and the pipe cover portion 2d of the outer case 2, and the unit 25c includes a water stop valve 134a when falling and a water stop valve when leaning forward. 134b and a discharge port 25d are provided. The discharge port 25d opens downward to the outside through the pipe cover 2d.

A cover plate 36 is applied to the opening 2c at the bottom 2a of the outer case 2 from below by screwing or partially engaging the cover plate 36, and a rotary seat ring 37 is rotated around the outer periphery of the cover plate 36. It is provided so as to be supported as possible, so that when the body 1 is fixed on a table surface or the like, it can be rotated slightly on the rotary seat ring 37 to change its direction.

When the power is turned on, the control board 27 is temporarily boiled from the viewpoint of hygiene of the contents liquid and the removal of the smell of lime, or the like. Heating of the heater 11 is stopped until a predetermined heat retention temperature is reached, and when the predetermined heat retention temperature is reached, the predetermined heat retention temperature is maintained by intermittent heating by the heater 11 or heating with a small current-carrying capacity.

The heat retention temperature can be selected by operating the operation panel 32, and it can be used immediately for coffee, tea, green tea, etc.
Alternatively, a high-temperature insulation of about 98 ° C. which can be used after being instantaneously re-boiled, an insulation of about 90 ° C. slightly lower than that, and an insulation of about 60 ° C. suitable for melting gyokuro and baby milk can be selected. In addition, there is also a thermos holding mode in which the content liquid is boiled to keep the temperature without heating by the heater 11. On the other hand, a rest timer mode in which the content liquid is poured out by the electric pump 26, and the timer is set such that the water content ends at a predetermined time, such as when the content liquid returns home or when the user wakes up, or is kept in a predetermined heat retaining state. In addition, a kitchen timer for counting and informing cooking time such as instant noodles and the regenerating time of frozen food, and a lock mode for dispensing to prevent inadvertent dispensing of a liquid content are selectively set. Further, a release operation for releasing these setting states is also performed.

The discharge passage 25 is provided in the narrow projection 31.
Even if it is installed together with the unit 25c, the annular space 65 around the mouth 3a of the vacuum double container 3 can be largely released to the vacuum double container 3 side. It is easy to prevent it from interfering with a certain operation board 33 or a board box 34 containing it,
The thickness and size of the protruding portion 31 can be reduced. In addition, since the diameter of the opening 12 of the body 1 also becomes smaller as the outer diameter of the opening 3a of the operation panel 32 becomes smaller, the distance from the tip of the protrusion 31 having the same degree of protrusion to the opening 12 as the conventional one becomes larger. Become
The operation panel 32 has a large area, and is easy to see and operate for providing various operation keys and a display unit. Another advantage is that a large liquid crystal display 38a is provided.

In the example shown in FIG. 16, the concave portion 3e to which the heater 11 is applied is formed concentrically with the body portion 2b, and the concave portion 84 does not have a concentric partial expanded portion. Thereby, the inflow end 25e of the discharge path 25 is connected to the ceiling wall of the concave portion 3e so as to prevent empty burning.

[0054]

According to one feature of the present invention, since the vacuum double container is made of a metal having high bending rigidity and high strength, the wall thickness and the vacuum space layer are small and slim, and high heat retention is achieved. In addition to being able to exhibit, the area where heat can easily escape due to the opening of the mouth of the vacuum double container is almost equal to the area where the content liquid where the heater is in contact with the single bottom of the vacuum double container is heated Since it is smaller than that, the heat of the content liquid is more difficult to escape than in the conventional case where the area is larger than the area where the content liquid is heated, and the heat retention power is further improved by the amount of the heat that is harder to escape, and further energy saving can be achieved. .

According to another feature of the present invention, since the vacuum double container is made of a metal having both high bending rigidity and high strength, the wall thickness and the vacuum space layer are small and slim, and exhibit high heat retaining power. In addition, since the opening area of the mouth of the vacuum double container is reduced to about the area of the single bottom to which the heater is applied, the heat of the content liquid is larger than in the conventional case that is larger than the area of the single bottom. It becomes difficult to escape, and the heat retention power is further improved by the amount of heat that has become difficult to escape, and further energy saving can be achieved.

In each of the above inventions, the outer diameter of the mouth portion of the metal vacuum double container is smaller than the body diameter of the outer cylinder forming the vacuum double container. By making use of the smaller size, the outer diameter can be reduced to reduce the volume around the mouth, contributing to further downsizing of the body. When the outer diameter of the mouth of the vacuum double container is smaller than the body diameter of the inner cylinder, the volume around the mouth can be further reduced.

In each of the inventions in which the outer diameter of the mouth is reduced, the joint between the mouth of the inner cylinder and the mouth of the outer cylinder which forms the vacuum double container is further provided with the port of the vacuum double container. In the configuration that is located on the outer diameter side of the opening end of the portion, the aperture shape of the opening that reduces the inner diameter of the opening together with the outer diameter is shared by the inner cylinder and the outer cylinder, and one of the inner and outer cylinders Since the drawing shape is not concentrated, it is easy to work, which is advantageous in terms of material and working work, and can reduce cost.

In each of the above-described inventions for reducing the outer diameter of the mouth, an annular space formed around the mouth between the outer diameter of the mouth and the outer diameter of the body of the vacuum double container is further utilized. In the configuration in which the shoulder portion of the vacuum double container is formed to cover the shoulder portion of the vacuum double container and form an opening of the body communicating with the mouth thereof, and a mounting portion for the vacuum double container is provided, the shoulder portion of the metal vacuum double container is provided. In order to attach a shoulder member that is easy to give the required shape around the opening of the container that is arranged and communicates with the mouth of the vacuum double container, the attachment part between the shoulder member and the vacuum double container is attached to the body of the vacuum double container. It is provided by using an annular space around the mouth between the outside diameter of the mouth and the outside diameter of the mouth, so there is no need for a special space for the mounting part, so the body does not become bulky and there is enough space around the mouth Easy to bulky with necessary mounting strength and seal part Or provided, it is suitable for hotel what other needs.

A lid for opening and closing the opening of the container communicating with the mouth by utilizing an annular space formed around the mouth between the outer diameter of the mouth and the outer diameter of the body of the vacuum double container. In the configuration provided with a connecting portion for hingedly opening and closing the body so that the lid that covers the opening of the body connected to the mouth of the metal vacuum double container is hingedly connected to the body so that it can be opened and closed. However, since the connecting portion of the container is provided using an annular space formed around the mouth between the outer diameter of the body and the outer diameter of the mouth of the vacuum double container, the connecting portion for hinge-connecting the lid is provided. No special space is required, the body does not become bulky, there is room for the space around the mouth, and there is a complicated and bulky connecting part such as a movable part for attaching and detaching the lid, and other necessary things are installed It is suitable to do. Due to the complicated and bulky connecting portion, it is easy to make the connecting portion which does not protrude from the outer surface of the conventional container body easy, and the appearance can be simplified.

A lid that covers the opening of the container that communicates with the mouth of the vacuum dual container is hinged to the shoulder of the container so that it can be opened and closed, and the lid has an entry portion into the mouth of the vacuum double container. When the mouth is at the closest position to the envelope drawn by the entrance when the lid is opened and closed, a part of the lid is used as an entrance to enter the mouth of the vacuum double container. While preventing the escape of heat through the part and increasing the heat retention, the swelling to the outside of the body can be suppressed while securing the capacity required for the lid by providing a steam passage and housing a manual pump, etc. Since the mouth of each invention in which the inner diameter of the vacuum double container is reduced is close to the envelope drawn by the outline of the entrance portion when the lid is opened and closed, the inner diameter is reduced to the limit that does not hinder the opening and closing of the lid. Heat can be made more difficult to escape.

In each of the above inventions, further, in the configuration in which the container is housed in a vacuum double container in an outer case,
Since the space between the outer case and the outer case itself has two heat insulating layers around the outside of the vacuum double container,
Further, the heat retaining power is improved, and the space between the vacuum double container and the outer case is suitable for accommodating the discharge means for the content liquid, the control board, the power supply board, and the like.

If the apparatus is provided with an electric pump or a manual pump for discharging the content liquid in the vacuum double container to the outside through the discharge path, it is possible to discharge and use the content liquid with the electric hot water storage container fixed. It is suitable for large types that have recently become large and are difficult to lift, especially when a manual pump is provided. It is suitable for energy saving and use where there is no power supply.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view showing one embodiment of an electric pot having a vacuum double container according to the present invention.

2 (a) is a sectional view and FIG. 2 (b) is a front view of a full water level indicator showing the vicinity of the mouth of a vacuum double container of the electric pot of FIG.

FIG. 3 is a cross-sectional view showing a shoulder member attaching portion around a mouth of the vacuum double container of the electric pot of FIG. 1;

4 is a cross-sectional view of the electric pot of FIG. 1 at another position showing a shoulder member attaching portion around the mouth of the vacuum double container.

FIG. 5 is a view showing a state of a discharge path connection state in the electric pot of FIG. 1;
It is a cross-sectional view which shows two examples.

FIG. 6 is a cross-sectional view showing another example of a discharge path connection state in the electric pot of FIG.

FIG. 7 is a plan view showing a half part of a vacuum double container in the electric pot of FIG. 1;

FIG. 8 is a bottom view showing a half part of the vacuum double container in the electric pot of FIG. 1;

FIG. 9 is a partial cross-sectional view showing the bottom of the inner cylinder constituting the vacuum double container in the electric pot of FIG. 1;

FIG. 10 is a partial cross-sectional view showing a bottom of an outer cylinder constituting a vacuum double container in the electric pot of FIG. 1;

FIG. 11 is a partial cross-sectional view showing a mouth of a vacuum double container in the electric pot of FIG. 1;

12 is a cross-sectional view of a part of the electric pot of FIG. 1 at another position showing a mouth portion of the vacuum double container.

FIG. 13 is a sectional view showing the entire bottom of the vacuum double container in the electric pot of FIG. 1;

FIG. 14 is a cross-sectional view of a shoulder ring covering a screwed portion of a shoulder member in the electric pot of FIG. 1;

FIG. 15 is an external perspective view of the electric pot of FIG. 1;

FIG. 16 is a sectional view showing another example of the vacuum double container in the electric pot of FIG. 1;

FIG. 17 is a sectional view of an electric pot having a conventional vacuum double container.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Instrument body 2 Outer case 3 Vacuum double container 3a Mouth 3b Trunk 3c Single bottom 3d Shoulder 4 Inner cylinder 5 Outer cylinder 6 Shoulder member 11 Heater 12 Opening 13 Lid 13a Entry part 15 Connecting part 16 Hinge pin 25 Discharge path 26 Electric pump 50 Bellows pump 63 Vacuum space 63a Wrap-around part 65 Annular space 66 Mounting part 67 Water level line 68 Stopper 71, 88 Mounting bracket 78 Envelope

Claims (10)

[Claims] 1. A vessel having a metal vacuum double container, a heater applied from outside to a single bottom of the vacuum double container, and an aperture-shaped opening having an inner diameter smaller than that of a body portion of the vacuum double container. In an electric hot water storage container having a vacuum double container having a portion formed therein, the opening of the mouth and the heater satisfy a relationship that the opening area of the mouth is substantially equal to or smaller than the area of the heater. An electric hot water storage container having a vacuum double container. 2. A vessel having a metal vacuum double container, a heater applied from outside to a single bottom of the vacuum double container, and an aperture-shaped opening having an inner diameter smaller than the body in the vacuum double container. In the electric hot water storage container having a vacuum double container having a portion formed therein, a wraparound portion of a vacuum space from a body portion is provided on an outer peripheral portion of a single bottom portion, and a single bottom portion and an opening portion inside the wraparound portion of the vacuum space are provided. Is characterized by satisfying the relationship that the opening area of the mouth is substantially equal to or smaller than the area of the single bottom part. 3. The vacuum as claimed in claim 1, wherein the outer diameter of the mouth of the metal vacuum double container is smaller than the body diameter of the outer cylinder forming the vacuum double container. Electric hot water container with double container. 4. The electric hot water storage container having a vacuum double container according to claim 3, wherein the outer diameter of the mouth of the vacuum double container is smaller than the body diameter of the inner cylinder. 5. The joint between the mouth of the inner cylinder and the mouth of the outer cylinder forming the vacuum double container is located at the outer diameter of the open end of the mouth of the vacuum double container. An electric hot water storage container having the vacuum double container according to claim 3. 6. A shoulder portion of the vacuum double container is covered by using an annular space formed around the opening between the outer diameter of the mouth portion of the vacuum double container and the outer diameter of the body portion. An electric hot water storage container having a vacuum double container according to any one of claims 3 to 5, further comprising a mounting portion for a shoulder member forming an opening of a communicating body and a vacuum double container. 7. A lid for covering an opening of a vessel communicating with the mouth portion by utilizing an annular space formed around the mouth portion between the outer diameter of the mouth portion and the outer diameter of the body portion of the vacuum double container. The electric hot water container having the vacuum double container according to claim 6, further comprising a connecting portion that is hingedly connected to the container so as to be opened and closed. 8. A lid that covers an opening of the container that communicates with the mouth of the vacuum double container is hinged to the shoulder of the container so that it can be opened and closed. The electric hot water container having the vacuum double container according to any one of claims 1 to 7, wherein the mouth portion is located at a position closest to an envelope drawn by the entry portion when the lid is opened and closed. 9. An electric hot water storage container having a vacuum double container according to claim 1, wherein the container contains a vacuum double container in an outer case. 10. The vacuum double container according to claim 1, further comprising an electric pump or a manual pump for discharging the liquid in the vacuum double container to the outside through a discharge path. Electric hot water container.