JP3752157B2 - Electric hot water storage container with vacuum double container - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an electric hot water storage container having a metal vacuum double container, and is used, for example, in an electric pot for home use.
[0002]
[Prior art]
Electric pots are widely used in homes, workplaces, canteens, etc., and are sometimes used all the time. On the other hand, high energy consumption by heaters in electric kettles has become an object of improvement as energy conservation is screamed in terms of environmental problems and resource conservation.
[0003]
Therefore, conventionally, an electric pot having a metal vacuum double container a as shown in FIG. 18 is provided, and the content liquid boiled as much as the heat retention is improved by the vacuum space b of the vacuum double container a. The power consumption of the heater c when keeping the temperature at a predetermined temperature is reduced.
[0004]
In particular, the conventional electric pot shown in FIG. 18 has a throttle portion f in which an inner tube e projects inward from a mouth portion d in a vacuum double container a, and a wrap-around portion g in which a vacuum space b of a body portion wraps around the bottom. The vacuum double container a is accommodated in the outer case h to form the container i, and the opening i leading to the mouth d of the vacuum double container a in the container i is formed in the container i. And a cover k that extends to the mouth d of the vacuum double container a is provided. As a result, even after 2 hours have passed since heating by the heater c after boiling, a normal heat retaining state of about 90 ° C. that can withstand practical use can be secured.
[0005]
[Problems to be solved by the invention]
However, while the thermos heat insulation mode in which heating by the heater c is not performed is put into practical use, further improvement of the heat insulation power is desired. Accordingly, as a result of repeated examinations by various experiments, the present inventors have found that the heat insulation effect is higher as the area of the vacuum space b around the vacuum double container a is larger, and the lid k closes the heat of the content liquid. However, it is easy to escape upward from the mouth portion d of the vacuum double container a, and the smaller the size, the better the heat retaining ability, but various obstacles occur in practice. However, when the present inventors comprehensively evaluated these relations, it was found that the heat retaining ability could still be increased in the electric pot shown in FIG.
[0006]
An object of the present invention is to provide an electric hot water storage container having a vacuum double container that can further improve heat retention and save energy without impairing convenience and practicality.
[0007]
[Means for Solving the Problems]
  In order to achieve the above object, an electric hot water storage container having a vacuum double container according to the present invention is provided in a container.,Metal vacuum double containerA shoulder member that forms an opening of the container leading to the mouth of the vacuum double container and a protrusion to the front and has an operation panel on the upper surface of the protrusion; and a lid that opens and closes the opening of the container ,HaveSaidApply a heater from the outside to the single bottom of the vacuum double container.And thisVacuum double containerThe mouth ofBoth inner and outer diameters are smaller than the trunk,AroundBetween the shoulder membersAnnular spaceToAperture shapeInFormingThe mouth of the vacuum double container is opened from the outer peripheral part of the mouth of the vacuum double container, leaving the inner peripheral part where the sealing member on the lid side is pressed against the opening of the container. The shoulder member extends through the shoulder ring that covers the inner peripheral part having the attachment part to the vacuum double container and covers the inner peripheral side downward,SaidVacuum double containerThe opening diameter of the mouth is 120 mm, which is the lower limit from the drawing processability, miniaturization, inner surface treatment and workability, and careability, and 140 mm, which is the upper limit from the heat retention, and the opening of the vessel The diameter is made smaller than the diameter of the body part of the outer cylinder forming the vacuum double container.
[0008]
  In such a configuration, since the vacuum double container is made of a metal having high bending rigidity and strength, the wall thickness and the vacuum space layer can be small and can be slim, and can exhibit a high heat retaining power. Where the opening diameter of the conventional electric pot is 145 mm, it is reduced to 140 mm or less, and even when the opening diameter is 140 mm, the temperature of the content liquid when the heating by the heater is stopped after boiling for 2 hours is the medium temperature The heat retaining power is improved to about 92 ° C. and the opening diameter is set to about 120 mm, which is the lower limit, so that the intermediate temperature holding temperature of 92 ° C. and the high temperature holding temperature of about 98 ° C. are approximately 95 ° C. As a result, the heat retention is further improved, and energy can be saved. In addition, the aperture diameter of 140 mm is only 3.45% lower than the conventional aperture diameter of 145 mm, and the lower limit of 120 mm is only 18.24% reduced. The workability of the shape is not particularly deteriorated, and the reliability and cost are not particularly different from the conventional ones. In addition, a necessary space can be provided by utilizing an annular space that is formed around the mouth portion whose inner and outer diameters are smaller than those of the body portion, and the body is not bulky and the appearance can be simplified.
  In addition, since the limit of the diameter of the opening for adults, especially the fist, is about 80 mm, it is much larger than this, so humans can easily enter it, so cleaning and wiping can be done easily as before. In addition, processing and processing operations such as guns and sprays that perform blasting and fluorine coating on the surface can be easily taken in and out, and there is no inconvenience in surface processing and processing operations. Furthermore, in conjunction with heat insulation without heating by a heater, a manual pump such as a bellows pump is built in the lid of the container, and it is considered to pressurize and discharge the content liquid without a power source. A pump having a capacity that can be secured is required. However, even if the minimum opening diameter is 120 mm, it is possible to prevent the cover from being built into the mouth portion and the cover to protrude greatly out of the body and to be enlarged.
  In addition, the opening of the container is reduced by the amount that the mouth of the vacuum double container is reduced, the distance from the tip of the protrusion to the opening of the container is increased, the area of the operation panel is increased, and various types of operations are performed. It is preferable to provide an operation key and a display unit because it is easy to see and operate, and is suitable for multi-functionality. There is also an advantage that a large liquid crystal display unit is provided.
[0009]
  In addition, the electric hot water storage container having the vacuum double container of the present invention is configured such that the mouth and the opening of the vessel leading to the mouth are externally provided with respect to the full water level indicator formed on the inner cylinder body of the vacuum double container. Has gained a field of view.
[0010]
Further objects and features of the present invention will become apparent from the following detailed description. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.
[0011]
【Example】
Hereinafter, embodiments of the present invention will be described in detail with reference to FIG. 1 to FIG. 17 for understanding of the present invention.
[0012]
This embodiment is an example of a household electric pot, and has a basic configuration in which a stainless steel vacuum double container is accommodated 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 is suitable as an electric hot water storage container for beverages because it has low thermal conductivity among metals, has sufficient bending rigidity and strength, and has a rust prevention effect.
[0013]
As shown in FIG. 1, the electric pot of the present embodiment heats the metal vacuum double container 3 composed of the stainless steel inner cylinder 4 and the outer cylinder 5 and the content liquid in the inner cylinder 4. And a heater 11 applied to the single bottom portion 3c of the vacuum double container 3, and these are housed in an outer case 2 made of synthetic resin to constitute a container 1. Thus, since the vacuum double container 3 is made of metal having high bending rigidity and strength, the wall thickness and the layer of the vacuum space 63 can be small and slim, but can exhibit a high heat retaining power in combination with the material. . However, the body of the vacuum double container 3 may be configured by exposing the body of the vacuum double container 3 to the outside. 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 The discharge port 25d faces the front portion of 1. An electric pump 26 is provided in the middle of the discharge passage 25 so that the content liquid can be discharged electrically. In addition to this, a manual bellows pump 50 is provided on the lid 13 that covers the opening 12 of the container 1 that leads to the mouth 3a of the vacuum double container 3 so that the vacuum double container can be pressed by the pressing plate 61. 3, pressurized air is blown into the interior 3 to pressurize the content liquid, and the liquid is pushed out through the discharge passage 25 and discharged to the outside.
[0014]
The rising portion 25a of the discharge path 25 is a transparent tube so that the liquid amount there can be seen through the liquid amount display window 62 shown in FIG. However, the liquid amount of the content liquid can be detected and displayed step by step with a photocoupler or the like by the photocoupler or the like, and can also be used as liquid amount data for various controls. Further, the automatic detection of the liquid amount may be performed by a capacitance method, or the liquid amount is automatically detected based on a temperature rise characteristic when the content liquid is heated by the heater 11 and a temperature drop characteristic when the heating of the heater 11 is stopped. be able to.
[0015]
By the way, the heat retaining characteristic in the thermos retaining state when the content liquid boiled in the electric pot having the vacuum double container 3 is left without being heated by the heater 11 is shown in FIG. It is almost inversely proportional to the size of the opening diameter D of 3a. Line {circle around (1)} shows the temperature drop after 2 hours of the content liquid, which is about 5 ° C. for 120 mm, about 10 ° C. for 145 mm, and about 17 ° C. for 180 mm.
[0016]
Therefore, if the opening diameter D of the mouth portion 3a is set to less than the conventional 145 mm, it is possible to improve the heat retaining power, which is the object of the present invention, and the opening diameter D of the mouth portion 3a is increased from the aspect of increasing the heat retaining power. It is preferable to make it as small as possible. But there are limitations. For example, considering the cleaning and wiping of the inside of the vacuum double container 3, for example, D = 80 mm is the limit for adult hands, especially fist, and when D = 100 mm It is easy to work, and if D exceeds about 120 mm, the work becomes free. If this relationship is determined between the opening diameter D and the cleanability, it is as shown by line (2) in FIG.
[0017]
Moreover, the part which accommodates the bellows pump 50 of the lid | cover 13 is made into the opening part 3a as shown in FIG. 1, FIG. 2 as the entrance part 13a, and the air in the vacuum double container 3 is made into the opening part 3a. A bellows pump with a capacity that can prevent the heat from escaping to the upper part as far as possible from the outside and prevent the lid 13 containing the bellows pump 50 from protruding greatly outward, but can ensure a discharge flow rate that does not interfere with practical use. 50, when the opening diameter D is less than 120 mm, it is difficult to make the entry portion 13a enter the mouth portion 3a. When the opening diameter D is less than 100 mm, the bellows pump 50 is disposed only on the mouth portion 3a. Since the cover 13 cannot be extended, the lid 13 extends outward and causes the electric pot to increase in size. When the relationship between the opening diameter D of the mouth portion 3a and the goodness / badness with respect to miniaturization is evaluated, it is as shown by a line (3) in FIG.
[0018]
In addition, the portion where the opening diameter D of the mouth portion 3a is smaller than the body is formed by drawing, but the smaller the opening diameter of the mouth portion 3a, the more difficult the drawing processing is. However, even if drawing can be performed, the yield and reliability are reduced due to cracks, etc., and even if the yield and reliability can be secured, it takes time to process and costs. It may cause a rise. For example, the inner cylinder 4 made of a material such as JIS SUS304 or SUS436 is processed by separating the body part and the drawing part when the opening diameter D of the mouth part 3a is aimed at 120 mm or less by drawing from the body diameter of 180 mm. There is a need. When the relationship between the opening diameter D and the goodness / badness due to the difficulty of processing is evaluated, it is as shown by a line (4) in FIG.
[0019]
In addition, in order to apply fluorine coating or polishing treatment to the inner surface of the inner cylinder 4, it is necessary to insert a tool such as a gun or a nozzle, and it is also necessary to be able to move the tool freely in order for the treatment to be uniform. . Accordingly, the smaller the opening diameter D of the mouth portion 3a, the more difficult the processing becomes, and there is a problem that even if it can be processed, it takes time or cannot be processed uniformly. Further, in the step of blasting the inner surface before fluorine coating to increase the adhesion of the fluorine coating layer, the blast material sprayed into the inner cylinder 4 is difficult to return to the outside of the inner cylinder 4 and the workability is deteriorated. For example, when the opening diameter D of the mouth portion 3a is less than 100 mm, a gun for spraying the coating material does not enter the inner cylinder 4, and fluorine coating becomes impossible. When evaluating the relationship between the opening diameter D and the quality of the inner surface of the inner cylinder 4 due to the difficulty in processing and processing, it is as shown by line (5) in FIG.
[0020]
Comprehensively judging the relationship between the heat retention characteristics and various good / bad properties shown in the above lines (1) to (5), care, miniaturization, drawing workability / cost performance, and machining of the inner surface of the inner cylinder 4 -It is preferable to set 120 mm, which is a satisfactory limit of the ease of processing, as the lower limit of the opening diameter D. Further, when the opening diameter D = 140 mm, as described above, the temperature drop width after 2 hours is about 8 ° C., the content liquid temperature is still kept at about 92 ° C., and the opening diameter D is 145 mm. The temperature drop after 2 hours is about 10 ° C. and the content liquid temperature is usually about 90 ° C., which is preferable because sufficient heat retention is improved. In the case of an electric pot with a capacity of 3L, the conventional power saving of about 6500 yen per year was performed. However, when the opening diameter D = 140 mm, the heater 11 was energized until the liquid content reached about 90 ° C. as in the conventional case. If power is stopped, power saving of over 7000 yen can be achieved. This will reach the merchandise value in 3 years and the yuan will be removed.
[0021]
However, as factors determining the upper limit of the opening diameter D, in addition to the various characteristics of the measured data, the user's desired items such as a user card and Internet information, power consumption with other home appliances such as an air conditioner, a TV, and a refrigerator There are various factors such as comparison with energy saving rate.
[0022]
Furthermore, as shown in FIG. 1, if the outer diameter of the mouth 3a of the vacuum double container 3 is smaller than the body diameter of the outer cylinder 5 forming the vacuum double container 3, the opening diameter D of the mouth 3a is By utilizing the fact that it has become smaller, the outer diameter can be made smaller, and the circumference of the mouth 3a can be made lower, which contributes to further miniaturization of the vessel body 1. Particularly in the present embodiment, the outer diameter of the mouth 3 a of the vacuum double container 3 is smaller than the trunk diameter of the inner cylinder 4. Thereby, the circumference of the mouth 3a can be further reduced.
[0023]
It should be noted that the opening diameter D of the mouth portion 3a is preferably set to a dimension that can be obtained by an adult person as described above and that can provide a visual field range θ as shown in FIG. 2 where the full water level index 67a can be seen. It is. Further, it is preferable that the visual field range θ includes the position of the eye when the operation panel 32 is operated. In the illustrated embodiment, a full water level index 67a is formed as a raised line on a raised wall 4n where a part of the body portion 4m of the inner cylinder 4 is raised inward to satisfy the visual field range θ. In addition, an upward arrow 67b is formed below the full water level index 67a that is easier to see than the full water level index 67a, and a character display 67c is formed for recognizing that the full water level index 67a is in the direction of the arrow 67b. It is easy for the user to keep 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 portion 3a is set to be substantially the same as or smaller than the full water level, heat escape from the mouth portion 3a. It is easy to hold down and heat retention improves.
[0024]
In this embodiment in which the outer diameter of the mouth portion 3a is thus reduced, the joint portion 64 between the mouth portion 4a of the inner cylinder 4 and the mouth portion 5a of the outer cylinder 5 forming the vacuum double container 3 is further provided. 1-4, it is located in the outer diameter side of the opening end in the opening | mouth part 3a of the vacuum double container 3. As shown in FIG. As a result, the aperture shape of the mouth portion 3a that reduces the opening diameter D of the mouth portion 3a together with the outer diameter is shared by the inner cylinder 4 and the outer cylinder 5, and the aperture shape is concentrated on one of the inner and outer cylinders 4 and 5. Therefore, it is easy to process and is advantageous in terms of material and processing work, and cost can be reduced. Both the inner and outer cylinders 4 and 5 can be manufactured without problems using JIS SUS304, SUS436 or the like.
[0025]
In addition to reducing the outer diameter of the mouth portion 3a, an annular space 65 formed around the mouth portion 3a between the outer diameter of the mouth portion 3a of the vacuum double container 3 and the outer diameter of the body portion 3b is utilized. As shown in FIGS. 1 to 3, a mounting portion 66 between the shoulder member 6 and the vacuum double container 3 is provided. Accordingly, the shoulder member 6 is attached to the shoulder portion 3d of the metal vacuum double container 3 so as to attach the shoulder member 6 that easily gives a necessary shape around the opening 12 portion of the vessel body 1 leading to the mouth portion 3a. And the vacuum double container 3 are provided using an 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, so that the attachment 66 No special space is required, and the body 1 does not become bulky, and there is enough space around the mouth 3a. It is suitable for installing things.
[0026]
In the illustrated example, attachment fittings 71 as shown in FIGS. 1 to 3 and 7 are provided by welding or the like at several locations in the circumferential direction of the shoulder 3d of the vacuum double container 3, and the shoulder member 6 is attached to the attachment fitting 71. Further, a metal-made washer ring 75 having an L-shaped cross section is applied to the mounting flange 6a on the inner periphery of the metal plate, and is screwed with a screw 72 passed from the washer ring 75 side to the mounting bracket 71. . This screwing can be achieved in a simple shape for both the mounting bracket 71 and the shoulder member 6 because the shoulder 3d is horizontal.
[0027]
The screwing portion of the shoulder member 6 is covered with a synthetic resin shoulder ring 73 fitted to the inner peripheral surface 6b integrally forming the mounting flange 6a of the shoulder member 6. As shown in FIG. 14, the shoulder ring 73 has hook pieces 73c extending downward at several places in the circumferential direction. These hook pieces 73c have holes 75a formed in the washer ring 75 and the attachment flange 6a as shown in FIG. It is inserted into 6d from above and is prevented from coming off by elastically engaging with the opening edge of the hole 6d at its final insertion position. In the shoulder ring 73, a seal member 74 fitted in an outer peripheral groove 73a is pressure-bonded to the inner peripheral surface 6b of the shoulder member 6 to seal a gap between them. As shown in FIGS. 3 and 4, the shoulder ring 73 is covered with a joint section 64 of the inner cylinder 4 and the outer cylinder 5 at the mouth 3a of the vacuum double container 3 with a bowl-shaped cross section. Sealing is performed by a sealing member 77 sandwiched between them. The seal member 77 has the inner peripheral side fitted into the mouth portions 4a and 5a which are the joint portions 64 of the inner and outer cylinders 4 and 5.
[0028]
  As shown in FIGS. 1 and 2, using the annular space 65, a connecting portion that hinges so that the lid 13 that opens and closes the opening 12 of the vessel 1 that communicates with the mouth 3a can be opened and closed to the vessel 1. 15 is provided. Thus, by providing the connecting portion 15 of the container 1 using the annular space 65, a special space for the connecting portion 15 for hinge-connecting the lid 13 is not required, and the container 1 is not bulky. It is suitable for providing a complicated and bulky connecting part 15 such as having a stopper 68 which is a movable part for attaching and detaching the lid 13 or providing other necessary things. Conventional for complex and bulky connectionsFIG.Shown inFIG.Projecting from the outer surface of the vessel 1 as shown by the phantom line in FIG.FIG.The connecting portion 15 that does not protrude from the body portion 2b as shown by the solid line can be easily formed, and the appearance can be simplified.
[0029]
In the illustrated example, the stopper 68 is urged upward by a spring 69 as shown in FIG. 2, and the laterally open portion 171 a of the fitting recess 171 with the hinge pin 16 in the connecting portion 15 is always closed. As a result, even if the hinge pin 16 is fitted and moved so as to be pulled out from the recess 171 while the lid 13 is in the open position removed from the opening 3a and the opening 12 of the container body 1, the hinge pin 16 is stopped by the stopper. No. 68 cannot be pulled out from the recess 171. In order to remove the lid 13, it is necessary to move the stopper 68 downward against the spring 69 by the operating portion 68a so as to fit and open the laterally open portion 171a of the recessed portion 171. This prevents the lid 13 from being inadvertently removed.
[0030]
The lid 13 has an entry portion 13a into the mouth portion 3a of the vacuum double container 3 as described above and shown in FIG. 2, and the mouth portion 3a is drawn by the entry portion 13a when the lid 13 is opened and closed. The position is closest to the envelope 78. In this way, by making a part of the lid 13 into the entrance portion 13a and entering the mouth portion 3a of the vacuum double container 3, the heat retention is prevented by preventing heat from escaping from the mouth portion 3a. At the same time, by accommodating the steam passage 17 and the bellows pump 50 which is a manual pump, the large capacity required for the lid 13 can be secured sufficiently, and the bulge to the outside of the container body 1 can be suppressed. In addition, since the mouth 3a having a reduced opening diameter D as described above of the vacuum double container 3 is in the immediate vicinity of the envelope 78 drawn by the outline of the entry portion 13a when the lid 13 is opened and closed, the lid 13 is opened and closed. It is possible to make the opening diameter D smaller to the limit that does not disturb the heat, making it more difficult for heat to escape.
[0031]
In addition, a sealing member 122 sandwiched between the lid 13 and a metal inner lid 121 applied to the entry portion 13a is provided around the base portion of the entry portion 13a of the lid 13, and the innermost diameter of the mouth portion 3a. The mouth portion 3a is closed by pressure contact. As a result, the air located in the safe space for preventing the content liquid from closing the inner opening 17a of the steam passage 17 between the full water level and the entry portion 13a spreads to the outside more than the mouth portion 3a, and heat can easily escape. This prevents the heat retention.
[0032]
In addition, if at least one of manual pumps such as the electric pump 26 and the bellows pump 50 is provided, the liquid contents can be discharged and used while the electric hot water storage container is fixed, and the size of the pump increases recently, making it difficult to lift. It is suitable for the large type. In particular, when a manual pump is provided, the content liquid can be discharged without being energized during use in a thermos warming state where the heater 11 is not heated, which is suitable for use in places where there is no energy saving or power supply.
[0033]
More specifically, as shown in FIG. 2, the inner cylinder 4 is connected to the small-diameter mouth portion 3a at a throttle-shaped surface 4b that rises obliquely inward from a little above the full water level line 67 in the trunk portion 4m. After the straight inner diameter surface 4c of the portion 3a is formed, the opening end surface 3a1 of the mouth portion 3a that is slightly inclined upward is formed to reach the weld joint 64 with the outer cylinder 5. The outer cylinder 5 is formed with a diaphragm-shaped surface 5b that rises obliquely inwardly from the diaphragm-shaped surface 4b from a position substantially corresponding to the rising start point of the diaphragm-shaped surface 4b of the inner cylinder 4 in the body 5m. It is connected to a horizontal shoulder 3d at a position substantially corresponding to the rising end point of 4b, rises straight from here and reaches the welded joint 64 with the inner cylinder 4.
[0034]
Further, as shown in FIG. 9, the inner cylinder 4 is formed with a small inward flange 4e at the lower end of the body portion 4m, and is formed into a container shape by integration with a circular bottom plate 81 and a weld joint 80. . At the bottom of the container-shaped inner cylinder 4 formed in this way, there are a horizontal part 4f, a gentle downward inclined part 4g, a horizontal part 4h, a steep downward inclined part 4i, and a central horizontal part 4j from the outer peripheral side to the central side. Forming. On the other hand, as shown in FIG. 10, the outer cylinder 5 is formed with an inward flange 5c at the lower end of the body part 5m, and a horizontal bottom ring 5d extending from the flange 5c to the outer periphery of the central horizontal part 4j of the inner cylinder 4. Are integrated with a welded joint 90, and the inner periphery of the bottom ring 5d is integrated with a welded joint 80 with the central horizontal part 4j of the inner cylinder 4. Two annular reinforcing beads 5g are formed on the bottom ring 5d by bending, and the inner reinforcing beads 5g are engaged with the steep downward inclined portion 4i of the inner cylinder 4 as shown in FIGS. When the bottom ring 5d and the central horizontal portion 4j are welded, the bottom portions of the inner and outer cylinders 4 and 5 can be positioned.
[0035]
As a result, a space wrap-around portion from the trunk portion is formed between the bottom ring 5 d of the outer cylinder 5 and the bottom portion of the inner cylinder 4. That is, when the vacuum space 63 is formed, the wraparound portion 63a of the vacuum space 63 is formed. The central horizontal part 4j of the inner cylinder 4 has a single bottom part 3c inside from the welded joint 80 with the bottom ring 5d of the outer cylinder 5, and the heater 11 is applied to the inner part 4 so that the liquid contained in the inner cylinder 4 can be efficiently used. Although it can be heated well, in the present embodiment, the portion to which the heater 11 of the central horizontal portion 4j is applied is a downward concave portion 3e that is depressed upward, and the position of the heater 11 is the same as 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 is increased, so that the heating efficiency is improved.
[0036]
An upward concave portion 84 is formed in an annular shape between the protruding portion into the inner cylinder 4 by the concave portion 3 e and the wraparound portion 63 a, and the content liquid discharged through the discharge path 25 is somewhat left in the concave portion 84. As shown, the inflow end 25e of the discharge passage 25 is made to protrude appropriately. As a result, the content liquid remains without being discharged as much as the inflow end 25e protrudes into the inner cylinder 4, thereby preventing emptying. In the embodiment shown in FIGS. 1 to 15, the inflow end 25 e of the discharge passage 25 is connected to the widened portion 84 a of the concave portion 84. When the extended portion 84a is formed by decentering a circular recess 3e as shown in FIG. 5, the area of the heater 11 is not reduced, so that the heating efficiency is not lowered. Further, the extended portion 84a may be formed by notching a part of the circular recess 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 notch. However, the ratio is small.
[0037]
A metal heat shield plate 87 is provided on the back of the heater 11 applied to the single bottom portion 3c, and is welded to the vacuum space surrounding portion of the vacuum double container 3 and the outer surface of the recess 3e in the circumferential direction. 1, 8, and 13, which are attached to several places, are screwed with screws 89, and a metal backup plate 92 and a spring member 91 are interposed between the heat shield plate 87 and the heater 11. The heater 11 is pressed against the single bottom portion 3c by the spring member 91 so as to be in close contact therewith. In addition, a double structure portion in which the inner and outer cylinders 4 and 5 serving as the weld joints are in contact with the contact portion of the heater 11 and the bottom portion of the concave portion 84 is located. The bottom mounting bracket 88 and the shoulder mounting bracket 71 are the same.
[0038]
Further, the outer cylinder 5 has a range of the mouth portion 3a from the portion of the throttle-shaped surface 5b through the shoulder portion 3d to the joint portion 64 with the inner cylinder 4 as a separate member 83 independent of the trunk portion side, A welded joint 85 is provided between the outward flanges 5e and 5f. By performing the welding joint of the separate member 83 lastly, the container-shaped inner cylinder 4 and the outer cylinder 5 portion without the separate member 83 are fitted to each other, and the bottom portion is welded and joined. By performing the above, a double container structure in which the inner and outer cylinders 4 and 5 having the throttle-shaped surfaces 4b and 5b are combined in both the inner and outer cylinders 4 and 5 is realized.
[0039]
The vacuum space 63 between the inner and outer cylinders 4 and 5 passes through the vacuum pulling hole 101 shown in FIG. 11 formed in a part of the shoulder 3d as shown in FIG. It is formed by evacuating and sealing with a sealing material. The evacuation is performed in a vacuum heating furnace. One or more getters 102 as shown in FIG. 12 are provided in the vacuum space 63 so as to absorb the gas generated over time in the vacuum space 63 so that the vacuum degree of the vacuum space 63 does not decrease. .
[0040]
The lid 13 is formed with a vapor passage 17 for releasing the vapor from the vacuum double container 3 to the outside. The lid 13 is formed on the inner opening 17a of the position facing the vacuum double container 3 of the lid 13 and the outer surface exposed to the outside. It communicates with the outer opening 17b. In the middle of the steam passage 17, when the container body 1 rolls over and the content liquid enters, a safety path 17 c is provided to delay the arrival to the outer opening 17 b by temporarily accumulating or detouring the liquid. As a result, it is 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. Further, when the container body 1 rolls over, the steam passage 17 is provided with a water stop valve 18 at the time of falling, which works by its own weight or the like so as to prevent the entering content liquid from proceeding forward. Is provided. In the illustrated embodiment, it is provided at one location just inside the inner opening 17a.
[0041]
The front portion of the lid 13 is provided with a lock member 21 that engages with the locking portion 19 on the shoulder member 6 side in the closed position and locks the lid 13 in the closed position, and the locking portion when the lid 13 is closed. The spring 22 is always urged to the locked position so as to automatically engage with the spring 19. Correspondingly, the lid 13 is provided with a lock release member 23 for releasing the lock by retracting the lock member 21. As shown in FIG. 1, the unlocking member 23 is of a lever type pivotally supported on the lid 13 by a shaft 24. By pushing down the front end 23a with a thumb or the like and rotating it counterclockwise, the locking member 21 is spring-loaded. It is possible to lift the lid 13 which has been unlocked by lifting the rear end 23b raised by the unlocking operation with another finger and opening it.
[0042]
The electric pump 26 is a centrifugal pump provided at a position immediately below the vacuum double container 3, and feeds the content liquid flowing from the vacuum double container 3 to the discharge port 25 d facing the outside of the container 1 through the discharge path 25. The liquid is discharged from the discharge port 25d and used.
[0043]
In the space 79 between the bottom 2 a of the outer case 2 and the bottom of the vacuum double container 3, a circuit box 28 that houses the heater 11 and the control board 27 that controls energization of the electric pump 26 is installed together with the electric pump 26. Has been. In the illustrated embodiment, the circuit box 28 is integrally formed in the opening at the bottom of the outer case 2. The circuit box 28 is provided with a lid 160 that opens downward and closes it. A temperature sensor 29 is applied to the center of the single bottom portion 3c of the vacuum double container 3 from below to detect the temperature of the content liquid at that time and control the heating of the content liquid in the hot water heating mode or the heat retaining mode. get information.
[0044]
An operation panel 32 is provided on the upper surface of the protruding portion 31 protruding in the shape of a bowl at the front portion of the shoulder member 6 of the body 1, and an operation portion for mode setting, a display corresponding to the operation, or a display indicating the operation state To do. Below the operation panel 32, that is, inside, an operation board 33 is provided for performing transmission and reception of signals corresponding to the operation and display, and in cooperation with the operation panel 32, external operation and display to the outside can be performed. Like that. The upper part of the discharge passage 25 constitutes an inverted U-shaped unit 25c at a portion between the projecting portion 31 of the container body 1 and the pipe cover portion 2d on the exterior case 2 side. A valve 134a, a forward stop water stop valve 134b, and a discharge port 25d are provided. The discharge port 25d is opened downward through the pipe cover portion 2d.
[0045]
A cover plate 36 is applied from below to the opening 2c in the bottom 2a of the outer case 2 and is attached by screwing or partial engagement so that a rotating seat ring 37 can rotate on the outer periphery of the cover plate 36. It is provided in a supported manner so that when the container 1 is placed on a table surface or the like, it can be rotated lightly on the rotating seat ring 37 to change its orientation.
[0046]
The control board 27 is once boiled from the viewpoint of sanitary and removal of the odor of the liquid by turning on the power, or after removing the chlorination such as continuing the boiling, and the temperature detected by the temperature sensor 29 is a predetermined temperature keeping. The heating of the heater 11 is stopped until the temperature reaches a predetermined temperature, and when the predetermined temperature is reached, the predetermined temperature is maintained by intermittent heating by the heater 11 or heating with a small energization capacity.
[0047]
The heat insulation temperature can be selected by operation on the operation panel 32, and can be used for coffee, tea, green tea, etc. immediately in time, or at a high temperature of about 98 ° C. that can be used after being instantly boiled, and slightly lower than about 90 ° C. Normal heat retention, low temperature heat retention of about 60 ° C. suitable for melting gyokuro and baby milk, etc. are the selection targets. Moreover, it has a thermos heat retention mode in which the content liquid is boiled and heat is retained without heating by the heater 11. On the other hand, the timer is set so that the content liquid is poured out by the electric pump 26, or when the content liquid has finished boiling at a predetermined time such as when returning home or when getting up, or the timer is set to be in a predetermined heat retaining state. In addition, a kitchen timer that counts and informs the cooking time such as instant noodles and frozen foods, and a dispensing lock mode to prevent inadvertent dispensing of the liquid contents are also selected and set. Further, a release operation for canceling these setting states is also performed.
[0048]
Moreover, even if it is installed in the narrow projecting portion 31 together with the unit 25 c of the discharge passage 25, the side of the vacuum double container 3 using the annular space 65 around the mouth 3 a of the vacuum double container 3 is used. Therefore, it can be easily prevented from interfering with the operation board 33 inside the operation panel 32, the board box 34 containing the operation board 33, etc., and the protrusion 31 can be made thinner and smaller. In addition, since the diameter of the opening 12 of the container body 1 is also reduced by the amount that the outer diameter of the mouth portion 3a is reduced, the distance from the tip of the protruding portion 31 having the same protruding degree to the opening 12 is large. Therefore, the area of the operation panel 32 is increased, and it is preferable to provide various operation keys and a display unit. There is also an advantage that a large liquid crystal display unit 38a is provided.
[0049]
In the example shown in FIG. 16, the recess 3e to which the heater 11 is applied is formed concentrically with the body portion 2b, and the recess 84 also has no concentric partial extension portion. The inflow end 25e of the passage 25 is connected to the ceiling wall of the recess 3e so that it can be prevented from flying.
[0050]
【The invention's effect】
  According to the present invention, since the vacuum double container is made of a metal having high bending rigidity and strength, the wall thickness and the vacuum space layer can be small and slim, and can exhibit high heat retaining power while being slim. Where the opening diameter of the conventional electric pot is 145 mm, it is reduced to 140 mm or less, and even when the opening diameter is 140 mm, the temperature of the content liquid when the heating by the heater is stopped after boiling for 2 hours is the medium temperature The heat retaining power is improved to about 92 ° C. and the opening diameter is set to about 120 mm, which is the lower limit, so that the intermediate temperature holding temperature of 92 ° C. and the high temperature holding temperature of about 98 ° C. are approximately 95 ° C. As a result, the heat retention is further improved, and energy can be saved. In addition, the aperture diameter of 140 mm is only 3.45% lower than the conventional aperture diameter of 145 mm, and the lower limit of 120 mm is only 18.24% reduced. The workability of the shape is not particularly deteriorated, and the reliability and cost are not particularly different from the conventional ones. In addition, a necessary space can be provided by utilizing an annular space that is formed around the mouth portion whose inner and outer diameters are smaller than those of the body portion, and the body is not bulky and the appearance can be simplified.
  In addition, since the limit of the diameter of the opening for adults, especially the fist, is about 80 mm, it is much larger than this, so humans can easily enter it, so cleaning and wiping can be done easily as before. In addition, processing and processing operations such as guns and sprays that perform blasting and fluorine coating on the surface can be easily taken in and out, and there is no inconvenience in surface processing and processing operations. Furthermore, in conjunction with heat insulation without heating by a heater, a manual pump such as a bellows pump is built in the lid of the container, and it is considered to pressurize and discharge the content liquid without a power source. A pump having a capacity that can be secured is required. However, even if the minimum opening diameter is 120 mm, it is possible to prevent the cover from being built into the mouth portion and the cover to protrude greatly out of the body and to be enlarged.
  In addition, the opening of the container is reduced by the amount that the mouth of the vacuum double container is reduced, the distance from the tip of the protrusion to the opening of the container is increased, the area of the operation panel is increased, and various types of operations are performed. It is preferable to provide an operation key and a display unit because it is easy to see and operate, and is suitable for multi-functionality. There is also an advantage that a large liquid crystal display unit is provided.
[0051]
  In addition, the electric hot water storage container having the vacuum double container of the present invention is configured such that the mouth and the opening of the vessel leading to the mouth are externally provided with respect to the full water level indicator formed on the inner cylinder body of the vacuum double container. Has gained a field of view.
[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.
FIG. 2 is a sectional view showing the periphery of the mouth of the vacuum double container of the electric pot shown in FIG. 1, and FIG.
3 is a cross-sectional view showing a shoulder member attaching portion around the mouth of the vacuum double container of the electric pot of FIG. 1. FIG.
4 is a cross-sectional view at another position showing a shoulder member attaching portion around the mouth portion of the vacuum double container of the electric pot of FIG. 1. FIG.
5 is a transverse sectional view showing one example of a discharge path connection state in the electric pot of FIG. 1. FIG.
6 is a cross-sectional view showing another example of a discharge path connection state in the electric pot of FIG. 1. FIG.
7 is a plan view showing a half part of the vacuum double container in the electric pot of FIG. 1. FIG.
8 is a bottom view showing a half part of a vacuum double container in the electric pot of FIG. 1. FIG.
9 is a partial cross-sectional view showing a bottom portion of an inner cylinder constituting a vacuum double container in the electric pot of FIG. 1. FIG.
10 is a partial cross-sectional view showing a bottom portion 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.
12 is a partial cross-sectional view at another position showing the mouth of the vacuum double container in the electric pot of FIG. 1. FIG.
13 is a cross-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 that covers a screwing 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 cross-sectional view showing another example of the vacuum double container in the electric pot of FIG. 1. FIG.
FIG. 17 is a graph showing the relationship between the opening diameter of the mouth of the vacuum double container and the goodness / badness seen from various surfaces.
FIG. 18 is a cross-sectional view of an electric pot having a conventional vacuum double container.
[Explanation of symbols]
1 body
2 exterior case
3 Vacuum double container
3a mouth
3b trunk
3c Single bottom
4 inner cylinder
5 outer cylinder
11 Heater
12 Opening
13 Lid
13a entry section
50 Bellows pump
63 Vacuum space
D Opening diameter

Claims (2)

A device body, a metal vacuum double container, a shoulder member having a top surface on the operation panel of the formed protrusions protruding portion of the opening and the front of the device body communicating with the mouth of the vacuum double container has a, a lid for opening and closing the opening of said instrument body, said vacuum double container of the single bottom against the heater from outside is Utotomoni, the mouth of the vacuum double container, from the inner and outer diameters are both the body portion also small, is formed in the diaphragm shape to the annular space between the collar member around, against the opening of the mouth of the vacuum double container is the device body, of the lid side of the mouth of the vacuum double container Inclined downward from the outer peripheral part that left the inner peripheral part where the seal member is pressed to the inner peripheral part having the attachment part to the vacuum double container in the shoulder member of the opening of the vessel body, and inclined downward on the inner peripheral side through via a shoulder ring covering, the opening diameter of the mouth of the vacuum double container, drawability, small resistance, the inner surface The lower limit from processing, workability, and careability is set to 120 mm to 140 mm, which is the upper limit from heat insulation, and the diameter of the opening of the container forms the diameter of the barrel of the outer cylinder forming the vacuum double container An electric hot water storage container with a vacuum double container characterized by being smaller than the above.   2. The vacuum double container according to claim 1, wherein the mouth and the opening of the vessel connected to the mouth obtain a visual field range from the outside with respect to a full water level indicator formed on an inner cylinder body of the vacuum double container. Electric hot water storage container.

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