JP2002330869A - Electric hot water storage vessel with vacuum double vessel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the heat insulating performance and energy saving performance of a cover part. SOLUTION: This electric hot water storage vessel is provided with a vessel body 13 having a vacuum double vessel 3 comprising an inner cylinder 1 and an outer cylinder 2, a heater 4 heating content liquid inside the inner cylinder 1, a delivery passage 5 guiding the content liquid to the outside, a delivery pump 14 delivering the content liquid through the delivery passage 5, a cover 8 closing an opening 118 of the vacuum double vessel 3 and the vessel body 13, and a steam passage 9 provided in the cover 8 and emitting the steam to the outside. The cover 8 is provided with a synthetic resin frame part 51 and a metal vacuum heat insulating material 66 fitted therein. The metal vacuum heat insulating material 66 is so provided as to prevent the covering of the steam passage 9.

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, and is applied to, for example, a household electric pot.

[0002]

2. Description of the Related Art At present, resource saving and energy saving are required in various fields. The same is true for household electrical appliances that are often used all the time. There is an urgent need for electric pots and the like using heaters with a large energizing load. Therefore, an electric pot using a metal vacuum double container has been realized. This makes it difficult for the heat of the content liquid heated and stored by the heater to escape to the outside, thereby achieving energy saving.

[0003]

However, even if a vacuum double container is employed, the opening of the vacuum double container and the opening of the container formed by the outer case accommodating the vacuum double container are complicated. It is necessary to close without any steam leaks while corresponding to the shape, and to release the steam generated from the content liquid heated and heated in the inner cylinder of the vacuum double container to the outside to raise the internal pressure abnormally. Need to be prevented.
In order to satisfy these requirements, the lid that closes the above-mentioned opening has to be a complicated structure, so a double-layered lid made of synthetic resin or some metal or a multi-layered lid is configured. However, while the heat insulation is improved by the vacuum double container, the heat insulation of the lid portion is low and the heat is easily dissipated upward, which is becoming a major problem.

[0004] It is an object of the present invention to provide an electric hot water storage container having a vacuum double container having a high heat insulating property in a lid portion and excellent energy saving.

[0005]

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 vessel having a vacuum double container constituted by an inner cylinder and an outer cylinder, a heater for heating the content liquid in the inner cylinder, a discharge path for guiding the content liquid to the outside, and a content liquid passing through the discharge path. A discharge pump for discharging, a lid for closing the opening of the vacuum double container and the vessel, and a vapor passage provided in the lid for discharging vapor to the outside are provided, and the lid is fitted with a synthetic resin frame portion. And a metal vacuum heat insulating material, wherein the metal vacuum heat insulating material is provided so as not to block the vapor passage.

[0006] In such a structure, the content liquid in the inner cylinder of the vacuum double container is heated by a heater to boil or keep the temperature and to store the hot water. In addition to the fact that heat is prevented from escaping to the outside by the vacuum insulation space between the two, in such a vacuum double container without such heat insulation effect or the opening of the vessel having the same, the lid closing this opening is The metal vacuum insulation member is fitted to the synthetic resin frame so as not to block the steam passage, so that the heat of the content liquid that is heated and stored in the inner cylinder without hindering the steam release. Since the escape from the opening of the vacuum double container to the upper portion is suppressed, the thermal efficiency of the entire electric hot water storage container is improved, and energy saving can be achieved as compared with the conventional case.

In addition, a vacuum double space formed of a material having low thermal conductivity such as stainless steel exhibits a particularly high heat insulating effect, so that a large heat insulating effect can be obtained without taking a large volume.

[0008] The lid may be hinged by a hinge so that the lid can be opened and closed on a synthetic resin shoulder.

Further, the vacuum heat insulating member may be provided so as to be multiplexed with another heat insulating layer provided on the lid, and the heat insulating layers may be vertically overlapped with each other in the lid. While being provided with a high degree of freedom in an arrangement avoiding various necessary structures, it is possible to easily prevent the heat in the vacuum double container from escaping to the outside through the lid as a whole, and to enhance the energy saving effect.

[0010] 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 employed alone or in combination in various combinations as far as possible.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described below together with respective embodiments with reference to FIGS. 1 to 23, for the understanding of the present invention.

In each embodiment, as shown in the drawings, a vacuum double container 3 composed of an inner cylinder 1 and an outer cylinder 2, a heater 4 for heating a liquid content in the inner cylinder 1, and a A discharge path 5 for guiding, a discharge pump 14 for discharging the content liquid through the discharge path 5, a double lid 8 closing or exceeding the opening 7 of the vacuum double container 3, and a double lid 8 Or an electric hot water storage container having a vacuum double container 3 provided with a steam passage 9 for discharging steam generated in the inner cylinder 1 to the outside through a multi-unit interior, and is an example of a case where the present invention is applied to a household electric pot. It is.

However, the present invention is not limited to the one shown in the drawings, but the vacuum structure of the vacuum double container 3, the relationship between the shape of the vacuum heat insulating space 11 of the vacuum double container 3 and the heating by the heater 4, and the discharge Various specific structures such as a structure and a lid structure can be adopted. For example, the heater 4 may be inserted into the vacuum double container 3 to heat the content liquid, or may be a single structure formed at the bottom of the vacuum double container 3 or a portion where the vacuum heat insulating space 11 is not formed. The liquid content may be heated by an external heating unit via an external heating unit connected to the inner cylinder 1 of the vacuum double container 3. The external heating part is natural convection due to heating, or pressure increase due to expansion or generated steam,
The content liquid in the inner cylinder 1 may be circulated so as to repeatedly pass through the external heating unit by pushing out the content liquid using a check valve or the like and accompanying suction of the content liquid, or circulation by an electric pump. .

In the electric pot of the present embodiment, the content liquid in the inner cylinder 1 of the vacuum double container 3 is heated by the heater 4 to boil or keep the hot water. The vacuum insulation space 11 between the inner cylinder 1 and the outer cylinder 2 effectively prevents heat from escaping to the outside. At the same time, in the portion of the opening 7 of the vacuum double container 3 which does not have such an insulating effect, the surface of each part or the inside of the multiple lids 8 closing the opening 7 or more and / or the hollow layer is put in place. The heat insulating layer 21 which does not block the vapor passage 9 is provided in a double or multiple manner. This prevents the heat of the content liquid, which is heated and stored in the inner cylinder 1, from escaping from the opening 7 of the vacuum double container 3 to the upper portion, without impeding the release of steam.
1 suppresses. Therefore, the thermal efficiency of the whole electric pot is improved, and energy saving can be achieved more than before. Moreover, the heat insulation layer 2
1 is inside the lid 8 and is not visible from the outside, so that the normal form of the lid 8 is not spoiled, and the provision of the heat insulating layer 21 does not cause a hygienic problem in various aspects such as its material.

When the heat insulating layer 21 is a closed space, heat transfer due to convection and escape of air is suppressed, so that heat insulating properties can be exhibited. If the closed space is a vacuum double space formed of a material having low thermal conductivity such as stainless steel or synthetic resin, a particularly high heat insulating effect is exhibited, so that a large heat insulating effect can be obtained without taking a large volume. However, the heat insulating layer 21 may be made of a foamed material such as foamed resin or foamed rubber, or other general heat insulating members, and a special material is not particularly required. However, as long as it is provided in the lid 8 and exhibits the above-mentioned heat insulating effect, other known ones or all the ones developed and provided from now on can be used.

In addition, the heat insulating layer 21 may be provided in a portion other than the steam passage 9 inside the lid 8 in the above. In this manner, the use of a portion other than the double or higher lid 8 having the vapor passage 9 is provided, and therefore, a heat insulating structure is provided without obstructing the discharge of the vapor through the vapor passage 9. This makes it possible to minimize the escape of heat from the opening 7 of the vacuum double container 3 to the outside through the lid 8, thereby achieving energy saving. If the steam passage 9 is provided in a substantially vertical region of a part of the lid 8 and the heat insulating layer 21 is provided annularly therearound, the space occupancy of the steam passage 9 can be increased by arranging it in a part of the lid 8. Can be reduced, and the heat insulating layer 21 can be provided more by that amount, and the energy saving effect can be further improved.

Further, the steam passage 9 is provided in a double or multiple layer in the lid 8 so as to be vertically overlapped with a heat insulating layer 21 provided in another layer at least at a steam outlet 9a to the outside. You can also. In this way, the heat insulating layer 21 hinders the heat in the inner cylinder 1 of the vacuum double container 3 from reaching the steam outlet 9a directly communicating with the outside of the steam passage 9 by heat conduction. A decrease in thermal efficiency in the steam passage 9 can be reduced, and the energy saving effect can be improved.

If the heat insulating layer 21 is provided in the double or multiple layers in the lid 8 so as to have portions which are vertically overlapped with each other, the heat insulating layer 21 is arranged in such a manner as to avoid various other necessary structures such as the steam passage 9. While being provided with a high degree of freedom, the vacuum double container 3
Heat in the inside can be easily prevented from escaping to the outside through the lid 8, and the energy saving effect can be enhanced.

Furthermore, a heat insulating layer 21 is provided on one or more layers by utilizing a double or multiple layers of the space other than the steam passage 9 inside the lid 8, and the heat insulating layer 21 is seen from a plane. The covering ratio of the opening of the vacuum double container 3 when viewed from above is 80% or more. As described above, by utilizing the double or multiple layers of the lid 8, the heat insulating layer 21 is provided on one or more of the layers, and the covering ratio of the opening 7 of the vacuum double container 3 to 80% or more. When the heat inside the vacuum double container 3 escapes to the outside through the lid 8, almost the entire area is covered with the heat insulating layer 21, so that a heat insulating effect almost similar to that obtained when the heat insulating layer 21 is obtained can be obtained, and a high energy saving effect can be exhibited.

In each of the above cases, when the heat insulating layer 21 is positioned so as to enter the opening 7 of the vacuum double container 3, the heat insulating region in the vacuum heat insulating space 11 of the vacuum double container 3 and the lid 8
The heat insulating area of the heat insulating layer 21 enters the opening 7 of the vacuum double container 3, and the heat insulating area of each other wraps the hot water storage area in the inner cylinder 1 almost seamlessly, so that the overall heat insulating effect is improved in each step. I do.

The heat insulating layer 21 may include a heat reflecting layer for reflecting heat inward. The heat reflection layer forming the heat insulating layer 21 is at least one of insert molding, sticking, thermal spraying, plating, coating, and mirror finishing of a sheet material or a plate material.
It is sufficient if there is a layer or surface that constitutes a heat reflection surface, and it does not particularly take up space,
It is provided at any place inside the lid 8 by using two or more layers, and it is easy to use in combination with the heat insulating structure in each of the above cases, and is suitable for obtaining a higher heat insulating effect. .

If a steam valve 68 as shown in the embodiment of FIG. 19 is provided in the steam passage 9 for normally closing the steam passage 9 while maintaining the predetermined steam pressure, heat to the outside through the steam passage 9 is obtained. Can be suppressed while the steam valve 68 is closed, the heat insulation effect is further improved, and more energy saving can be achieved.

Here, each embodiment shown in the drawings will be described in detail. In the first and second embodiments shown in FIGS. 1 to 4, the vacuum double container 3 is housed in an outer case 12 made of synthetic resin as in the embodiment shown in FIG. Is composed. However, the body 13 of the vacuum double container 3 may be configured to be exposed to the outside. In any case, the liquid content in the inner cylinder 1 of the vacuum double container 3 is heated from the outside by the heater 4 and stored, and discharged by the discharge pump 14 into the discharge path 5.
Is used by being discharged to the outside. At the rising portion of the discharge path 5 which rises outside the body of the vacuum double container 3, there is provided a liquid amount display portion 5a made of a transparent or translucent material, which is fitted with the transparent plate of the container 13. It can be visually recognized from the outside through the liquid amount display window 57 that has been combined.

In the vacuum double container 3, an outer flange 3d is formed at the outer edge of the opening 7 by the inner and outer cylinders 1 and 2 constituting the vacuum double container 3, and the outer flange 3d is connected to the shoulder 16 of the body 13. It is arranged on the upward step 17 facing the rising wall 18 following the step 17. The outer case 12 is made of synthetic resin and has a bottom and a body integrally formed. However, if the body is made of metal and the body is made of metal, it is preferable that the bottom, which tends to be complicated in structure and shape, be made of synthetic resin. The outer case 12 may be made of a synthetic resin for both the bottom and the body, or may be divided as necessary in view of the molding and the whole assembly. The inner and outer cylinders 1 and 2 of the vacuum double container 3 are both made of stainless steel plate, which is a metal having low thermal conductivity, and are suitable for securing heat insulation. However, the present invention is not particularly limited to this, and other cases may be used. A metal material can also be used. The inner and outer cylinders 1 and 2 constituting the vacuum double container 3 are preferably made of metal from the viewpoint of pressure resistance. However, if a support spacer is provided inside, another material such as a synthetic resin can be used. According to this, the heat insulating property is further improved.

The inner cylinder 1 is in the shape of a container having a bottom, while the outer cylinder 2 is in the form of a cylinder, and the lower end is bent inward so that the bottom of the inner cylinder 1 can be brazed from the outside. It is integrated so that there is no vacuum leakage. A heater 4 is applied to the outside of the single bottom 3c of the vacuum double container 3 formed thereby, so that the content liquid can be efficiently heated, and the water can be heated and kept warm. The outer flange 3d of the vacuum double container 3 is welded to an outer peripheral portion where the outer flanges of the inner and outer cylinders 1 and 2 are overlapped. Thereby, the integration by welding the inner and outer cylinders 1 and 2 can be easily achieved by TIG welding or the like from the outer periphery at the joint between the outer flanges of the inner and outer cylinders 1 and 2.

In order to perform welding in a state where the outer flanges of the inner and outer cylinders 1 and 2 are overlapped with each other, the outer cylinder 2 has a straight body portion extending straight down from the inner periphery of the outer flange, The inner cylinder 1 has an opening 3b that closely fits into the inner periphery of the opening of the outer cylinder 2, and through an opening 7 that is formed by being squeezed slightly inward to a diameter close to the trunk of the outer cylinder 2. It has an expanded body and forms a closed space forming a vacuum heat insulating space 11 between itself and the outer cylinder 2. As the opening 7 is smaller, the function of the vacuum heat insulating space 11 for preventing heat from flowing upward from the inside of the vacuum double container 3 through the lid 8 increases.

The shoulder 16 of the body 13 is an independent shoulder member made of synthetic resin because of its complicated shape and structure. The shoulder member 16 is fitted to the upper end of the outer case 12 from above, and the outer flange 3 d of the vacuum double container 3 is placed on an upward step 17 at the lower part of a rising wall forming the inner periphery of the shoulder member 6.
Are mounted and supported, and the bottom of the vacuum double container 3 and the bottom of the outer case 12 are connected by metal fittings and screws (not shown) to form the outer case 12, the shoulder member 16, and the vacuum double container 3 Are integrally combined to form the container 13.

Opening 118 formed by shoulder member 6 of body 13
Is provided with the lid 8, and the opening 118 is opened and closed together with the opening 7 of the vacuum double container 3. For opening and closing, the lid 8 is pivotally supported by a bearing 19 provided at the rear of the shoulder member 16 so that the lid 8 can be attached and detached by a hinge pin 22. The lid 8 is attached and detached in the operation of opening and closing by rotation about the hinge pin 22.
The hinge pin 22 can be inserted into or pulled out of the bearing portion 19 through the inwardly directed slit at the open position deviated from the position where the hinge pin 22 is fitted to the opening 7.

In the steam passage 9 for letting steam from the inside of the inner cylinder 1 of the lid 8 escape to the outside, the steam outlet 9a is formed on the upper surface of the lid 8, and the steam inlet 9b from the inner cylinder 1 to the lid 8 is formed on the lower surface. Have been. A safety path 9c is provided in the middle of the steam passage 9 to temporarily store or bypass the content liquid when the container 13 rolls over and the content liquid enters, thereby delaying the liquid from reaching the steam outlet 9a. This makes it possible to take measures such as raising the container 13 before the container 13 rolls over and the content liquid flows out through the vapor passage 9 to the outside.

In addition, when the body 13 rolls over, the overturn stop valve 23 which works by its own weight or the like so as to prevent the liquid entering the steam passage 9 from moving forward when the body 13 rolls over. Are provided in place. In the embodiment shown, it is provided at one location just inside the steam inlet 9b.

A lock member 25 is provided at the front of the lid 8 to engage with the locking portion 24 on the shoulder member 16 side in the closed position to lock the lid 8 in the closed position. When the lid 8 is closed, The spring 26 always projects to the lock position by the bias of the spring 26 so as to automatically engage with the locking portion 24. Correspondingly, the lid 8 is provided with a lock release member 27 for releasing the lock by retreating the lock member 25. The lock release member 27 is connected to the lid 8 by a shaft 29 as shown in FIG.
The lock member 25 is retracted against the spring 26 by pushing down the front end with a thumb or the like and rotating counterclockwise to release the lock.
Next, the unlocking member 2 raised by the unlocking operation
By lifting the rear end of the lock 7 with another finger, the unlocked lid 8 can be lifted and opened.

The discharge pump 14 is an electric centrifugal pump and is provided at a position immediately below the vacuum double container 3.
3 and is discharged toward the discharge port 5d facing the outside, and discharged from the discharge port 5d to the outside for use. The discharge pump 14 is also provided so as to send air into the vacuum double container 3 to pressurize the content liquid and extrude and discharge it through the discharge path 5. Also,
Either discharge method can be replaced with a manual pump.

In the space between the bottom of the outer case 12 and the bottom of the vacuum double container 3, a circuit box 32 accommodating the discharge pump 14 and a control board 29 for controlling the power supply to the heater 4 and the discharge pump 14 is provided. is set up. In the illustrated embodiment, the circuit box 32 is formed integrally with the opening at the bottom of the outer case 12, but may be formed separately from the bottom and screwed. Circuit box 3
Although 2 is open downward, a lid for closing it can be provided. A temperature sensor 33 is applied to the center of the single bottom 3c of the vacuum double container 3 from below to detect the temperature of the content liquid at each time and to control the heating of the content liquid in the water heating or heat retaining mode. Get.

An operation panel 35 is provided on the upper surface of the beak-like projection 34 projecting from the front part of the shoulder member 16 of the body 13 to display an operation section such as a mode setting, a display corresponding to the operation, or an operation state. The display shown below is performed. Below the operation panel 35, an operation board 36 for transmitting and receiving signals corresponding to the operations and displays is provided.

The discharge path 5 includes the vacuum double container 3 and the outer case 1
After standing up between the two units, an inverted U-shaped unit 5c is formed by a portion inserted between the beak-shaped protrusion 34 of the body 13 and the pipe cover 37 on the outer case 12 side.
In the portion connected to the rising portion of the discharge path 5 of c, a water stop valve 38 at the time of falling, a tilt water stop valve 39, and the discharge port 5d are provided. The discharge port 5d has an opening at the bottom of the pipe cover 37 and a discharge port cover 41 attached to this opening from below.
It is open downward through the outside.

A cover plate 42 is applied to the opening at the bottom of the outer case 12 from below by screwing or partially engaging the cover plate 42 so that a rotary seat ring 43 can rotate around the outer periphery of the cover plate 42. When the container 13 is fixed on a table surface or the like, it can be rotated slightly on the rotary seat ring 43 to change its direction.

As shown in FIG. 2, the lid 8 is made of a resin upper plate 5.
1 and a lower plate 52, a basic structure is formed by a hollow upper lid 53 and a metal inner lid 55 made of stainless steel or the like, which is screwed to the lower surface of the upper lid 53 with a fitting screw 54. The seal lip 56a of the seal packing 56 which is fitted to the outer periphery of the opening 55 and sandwiched between the upper lid 53 is pressed against the upper surface of the opening edge of the opening 7 of the vacuum double container 3 so as to close the opening 7 tightly. . Thereby, it is possible to prevent the steam and heat from escaping to the outside through the space between the opening 7 formed by the inner cylinder 1 and the inner lid 55, thereby enhancing the heat insulating effect.

The steam passage 9 is fitted from below into the upper plate 51, the lower plate 52, and the concave portion of the lower plate 52, and the inner lid 55.
Auxiliary plates 58 and 59 sandwiched between the
The maze is composed of multiple mazes. For this reason,
The distance from the steam inlet 9b to the steam outlet 9a of the steam passage 9 is considerably long, and a safety path 9c in which a large liquid pool is formed in the middle of the steam passage 9 can be formed. The time required for the content liquid to flow out when flowing out to the outside through the passage 9 can be sufficiently long.

The heat insulating material 61 is built in the uppermost hollow layer formed by the upper plate 51 and the lower plate 52 so as to partially form a quintuple structure including the safety path 9c. 21 are formed. In this embodiment, the heat insulation layer 21 is provided by using the above-described multiplex structure of the lid 8 in a different layer from the other part except for the part of the steam outlet 9 a of the steam passage 9 so as to be vertically overlapped with each other. The material 61 has a structure that is provided as long as it avoids the portion of the steam outlet 9a of the steam passage 9 and the installation region of the lock member 25 and the unlocking member 27. The heat insulating layer 21 is approximately 90% of the opening 7 of the vacuum double container 3. Can be covered in the lid 8. However, if the range of 80% can be covered, the heat insulation effect comparable to that of 100% can be obtained.

Considering that there is no layer portion overlapping the steam outlet 9a when forming the steam passage 9, by providing a heat insulating material in another layer overlapping the steam outlet 9a, the steam outlet 9a is provided.
A heat insulating material is present in a part of the portion where a is located in the vertical direction, and heat can be prevented from escaping upward without the heat insulating material. However, the multi-layer structure itself of the synthetic resin of the lid 8 is also a kind of heat-insulating structure including an air layer in the middle. Further, if a heat insulating member is provided by using another hollow layer overlapping the installation region of the lock member 25 and the lock release member 27, heat can be prevented from escaping upward without the heat insulating material even in this installation region. be able to.

In the second embodiment shown in FIGS. 4 to 6, the outer flange 3 d of the vacuum double container 3 has the flange provided at the upper end of the straight barrel of the inner cylinder 1 and the straight barrel of the outer cylinder 2. The flange provided at the upper end is vertically connected and connected. Since the vacuum heat insulating space 11 extends to the outer flange 3d, the heat insulating effect around the opening 7 of the vacuum double container 3 is enhanced. Moreover, the multiplex structure of the lid 8 is substantially the same as that of the first embodiment, except that the steam passage 9 immediately above the lower plate 52 is formed in addition to the heat insulating material 61 arranged similarly to the first embodiment. The heat insulating material 62 is also provided in the annular region around the heat insulating layer, and the heat insulating layer 21 is formed in multiple layers.

The heat insulating material 62 prevents the heat from escaping upward in the area overlapping with the heat insulating material 61 so as to enhance the heat insulating effect as compared with the first embodiment. In this case, the area for preventing heat from escaping upward due to the heat insulating layer 21 is increased as compared with the case of the first embodiment. Therefore, the first
The heat insulating property is greatly improved as compared with the case of the embodiment. Moreover, the annular heat insulating material 62 is provided so as to slightly enter with the inner lid 55 and the lower plate 52 up to the area of the vacuum double container 3 where the vacuum heat insulating space 11 is formed.
The hot water storage area in the inner cylinder 1 can be almost completely wrapped by the heat insulating area in the vacuum heat insulating space 11 of the vacuum double container 3 and the heat insulating area 21 of the lid 8, so that the overall heat insulating effect is improved in each step. I do. Further, with this, the inner cylinder 1 can exhibit a sufficient heat insulating effect without taking a configuration in which the opening 7 is made a straight body and the opening 7 is narrowed down as in the first embodiment, and the opening 7 may be enlarged. The work and handling during washing, etc. are facilitated by the minute.

A safety lid 71 is provided at the rear end of the lock release member 27. The rear end of the safety lid 71 is supported by a shaft 72 so as to be rotatable, and the front end is in contact with the rear end of the lock release member 27 from below by the bias of a spring 73. The safety lid 71 is such that the lock release member 27 is
Following the operation of releasing the lock and following the upward movement of the rear end, the finger can be hung on the upwardly moved rear end of the unlocking member 27 only by pushing down the safety lid 71. In order to pull up the end with a finger, an operation of first pressing down the safety lid 71 is always required, so this prevents erroneous operation in which the rear end is inadvertently pulled up or mischief operation,
Use safety can be achieved.

Since other structures and functions to be performed are not particularly different from those of the first embodiment, the same members are denoted by the same reference numerals, and overlapping drawings and explanations are omitted.

In the third embodiment shown in FIG. 7, the annular heat insulating material 62 of the second embodiment is divided into three equal parts in the circumferential direction and has the same shape. The aim is to improve performance and reduce costs. In the divided body 62a, thin portions 62a1 having a reduced thickness for overlapping with the lock member 25 and the unlocking member 27 are integrally formed at both ends of the thick portion 62a2 which is not a layer. However, the shape may be set variously according to the shape and size of the space in which the heat insulating material by the structure of the lid 8 can be installed.

In the fourth embodiment shown in FIG. 8, when the annular heat insulating material 62 is arranged, it is necessary to cut the same shape from the heat insulating sheet material 62b and remove the cloth as shown by the broken line. I can only get it. As shown by the solid line, the material is taken out as a divided body 62a divided into four parts, so that three annular heat insulating materials 62 can be taken out of the heat insulating sheet material 62b of the same size. In this sense, the divided body 62a of the third embodiment also provides an advantage close to this.

In the fifth and sixth embodiments shown in FIGS. 9 and 10, the heat insulating layer 21 is formed by incorporating the blow-molded hollow heat insulating material 75 in the lid 8. Such a hollow heat insulating material 75
By confining the air in a narrow space, the movement of the heat due to the free movement of the air is prevented, the heat in the vacuum double container 3 is prevented from escaping upward through the lid 8, and the heat insulation is achieved. When the closed space 75a formed by the hollow heat insulating material 75 is thin as in the embodiment shown in the figure, the convection itself of the air inside is well prevented and the heat insulating effect is further enhanced. Hollow insulation 7
5 is made of a flexible resin material, even if it is extremely thin, and can be handled without breaking it, and it can be handled with a high degree of familiarity with others. As in the fifth and sixth embodiments shown in FIGS. 9 and 10, it can be arranged in the gap between the lock member 25 and the lock release member 27, and other than the outlet 9a of the steam passage 9 except for the outlet 9a. The entire area can be covered, exhibiting a high heat insulating effect.

In particular, in the fifth embodiment shown in FIG. 9, the hollow insulation material 75 is divided and accommodated, but in the sixth embodiment shown in FIG. Since it is housed as one hollow heat insulating material 75, the labor of molding and assembling is simplified, so that the cost can be further reduced.

In the seventh embodiment shown in FIGS. 11 and 12, the steam passage 9 is centrally arranged substantially at the center of the lid 8, and a detour path having a required length is formed by a multi-layer structure, thereby ensuring safety when the body falls. As shown in the figure, an annular heat insulating material 62 is arranged in two stages over the entire area to insulate the heat, and another heat insulating material 61 is accommodated in the uppermost part in the lid 8 so that the outlet 9a of the steam passage 9 is formed. Almost all areas except for are covered and insulated. Further, the two-stage heat insulating material 62 overlaps the outlet 9a vertically and insulates the heat, and when seen through from a plane, the heat insulating materials 61, 62 and 62 are formed by opening the vacuum double container 3 as shown in FIG. 7 and 118, and covers almost the entire area of the upper end of the container 13, so that any portion including the steam passage 9 and its outlet 9a can be installed in the vacuum double container without heat insulating material. Can be prevented from being released above the lid 8. Moreover, these heat insulating materials 61, 62, 62
Are the vacuum insulation space 11 of the vacuum double container 3 and the inner cylinder 1
And the uppermost part of the body 13 including the extended vacuum heat insulating space 11a inwardly formed by narrowing the opening 7 of the housing 13 in multiple layers. The material 62 is formed so as to enter deeply into the opening 7 of the inner cylinder 1 together with the inner lid 55 made of resin or metal, so that the heat insulating effect at the upper end of the vacuum double container 3 becomes higher in each step. ing.

In the eighth embodiment shown in FIG. 13, the structure of the steam passage 9 in the lid 8 is simplified by using only one auxiliary plate 59, and the lid 8 is made first and second. It is configured in a quadruple structure that is more simplified than the quintuple structure of the example. Thereby, the outlet 9 above the steam passage 9 can be formed without particularly increasing the size of the lid 8.
The inner space around a can be made large at the uppermost position, and a sufficient heat insulating effect can be obtained only by housing one thick and wide heat insulating material 61 here.

In the ninth embodiment shown in FIG. 14, a vapor passage 9 is formed in one place in a lid 8 having a multiplex structure substantially similar to that of the eighth embodiment, and the multiplex structure has a required length. With the path secured, the hollow area in the lid 8 around the steam passage 9 is further expanded so that the heat insulating materials 61 and 62 can be accommodated in a wider range to improve the heat insulating effect. In this embodiment, the heat insulating material 61 is particularly divided into various parts, so that it is easy to cope with the shape of the lid 8 and the arrangement of the lock member 25.

In the tenth embodiment shown in FIG. 15, the seal packing 56 for sealing between the inner lid 55 of the lid 8 and the opening 7 of the inner cylinder 1 is provided with a hollow seal lip 56b, whereby the inner lid 55 is provided. Further, heat is easily prevented from escaping to the outside from between the opening 7 of the inner cylinder 1 and the heat insulating effect is improved accordingly. Therefore, it is particularly effective when used in combination with those of the other embodiments.

In the eleventh embodiment shown in FIG. 16, a vacuum insulating material 66 made of metal such as stainless steel and having a vacuum double structure is fitted inside the upper plate 51 of the lid 8 to form the upper lid 53. Auxiliary plates 58 and 59 made of resin are arranged between the vacuum heat insulating material 66 and the metal inner lid 55 to form the steam passage 9. Since the vacuum heat insulating material 66 is made of metal and has high rigidity, the bonding strength with the upper plate 51, the inner lid 55, and the like is sufficient, so that the bonding structure is simplified and the lid 8 is reduced in volume.
At the same time, the space occupancy of the lid 8 of the vacuum heat insulating material 66 can be increased and a high heat insulating effect can be exhibited.

The twelfth embodiment shown in FIG. 17 uses the high rigidity of the metal vacuum heat insulating material 66 to fit the upper plate 51 formed in the frame shape of the lid 8 to form a part of itself. Is a simplified structure that forms the outer surface of the lid 8, for example, most of the upper surface. This makes the appearance unique compared to the other embodiments. However, the metal vacuum heat insulating material 66 may be provided in any range and in any range, and may be formed in multiple layers with various heat insulating layers.

In short, the metal vacuum heat insulating member 66 has high rigidity and forms the outer surface of the lid 8 to realize a unique lid structure having a metal outer surface as a part. By providing a space that fills the dead space in 8, the single heat-insulating layer can exhibit high heat-insulating properties and improve the heat retention of the electric hot water storage container.

In the thirteenth and fourteenth embodiments shown in FIGS. 18 and 19, the steam passages 9 are provided with steam valves 67 and 68 for normally closing the steam passage 9 while maintaining a predetermined steam pressure. .
Thus, the escape of heat to the outside through the steam passage 9 can be suppressed while the steam valves 67 and 68 are closed, so that the heat insulating effect is further improved and energy saving can be achieved.

The steam valve 67 of the thirteenth embodiment is, for example, a ball valve which closes by its own weight, whereas the steam valve 68 of the fourteenth embodiment is supported by a shaft 74 so as to be rotatable.
As a butterfly valve biased toward the closing side.

In the fifteenth embodiment shown in FIG. 20, a heat insulating layer 175 is formed on the upper surface of the inner lid 55 of the lid 8.
The heat insulating layer 175 is formed by spraying Al ₂ O ₃ , but the upper surface of the inner lid 55 made of stainless steel is blasted and roughened, then sprayed, and further sealed. As a result, a favorable heat insulating effect can be obtained with little need for a dedicated space. Therefore, it is easy to use another heat insulating structure in combination.

In the sixteenth embodiment shown in FIG. 21, an Al layer 76 is vapor-deposited and plated on the upper surface of the lower plate 52 of the lid 8 so that the heat escaping upward is reflected on the side of the metal double container 3. To insulate them. Since this also does not take up space, it is easy to use in combination with other heat insulating structures.

The seventeenth embodiment shown in FIG.
The shoulder member 16 is divided into a synthetic resin shoulder receiver 77 that directly receives the outer flange 3d of the vacuum double container 3 and an outer member 78 that connects the shoulder member 77 to the body 13, and is connected with screws 79 or the like. Heat transmitted through the vacuum double container 3 is prevented from escaping to the outside through the shoulder support 77. Therefore, it is preferable that the shoulder support 77 be made of a material having low thermal conductivity.

The eighteenth embodiment shown in FIG.
By covering the outer peripheral portion of 6 with the upper plate 51 of the lid 8, heat is prevented from escaping to the outside through the vacuum double container 3 and the shoulder member 16, and a heat insulating effect is obtained.

[0062]

According to the main feature of the electric hot water storage container having the vacuum double container according to the present invention, the content liquid in the inner cylinder of the vacuum double container is heated by a heater to boil or keep the temperature and store the hot water. In addition, around the vacuum double container, the vacuum insulation space between the inner cylinder and the outer cylinder prevents heat from escaping to the outside well, and the vacuum double container without such heat insulation effect or In the opening of the vessel having the opening, the lid that closes this opening does not block the steam passage by fitting a metal vacuum heat insulating member to the synthetic resin frame so that there is no hindrance to steam release. In addition, since the heat of the content liquid, which is heated and stored in the inner cylinder, is prevented from escaping from the opening of the vacuum double container to the upper part, the thermal efficiency of the entire electric hot water storage container is improved and energy saving is achieved as compared with the conventional case. Can be achieved.

Furthermore, a vacuum double space formed of a material having low thermal conductivity such as stainless steel exhibits a particularly high heat insulating effect, so that a large heat insulating effect can be obtained without taking a large volume.

The lid may be hinged on a synthetic resin shoulder so as to be opened and closed.

The vacuum heat insulating member may be provided so as to be multiplexed with another heat insulating layer provided on the lid, and the heat insulating layers may be vertically overlapped with each other in the lid. While being provided with a high degree of freedom in an arrangement avoiding various necessary structures, it is possible to easily prevent the heat in the vacuum double container from escaping to the outside through the lid as a whole, and to enhance the energy saving effect.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of an electric pot according to an embodiment of the present invention.
It is sectional drawing which shows Example of (a).

FIG. 2 is a sectional view of a lid of the electric pot of FIG. 1;

FIG. 3 is a front view of the electric pot of FIG. 1;

FIG. 4 is a sectional view showing an electric pot according to a second embodiment.

FIG. 5 is a sectional view of a lid of the electric pot of FIG. 4;

6 is a top view of the electric pot of FIG.

FIG. 7 is a top view of the electric pot of the third embodiment.

FIG. 8 is a plan view showing material removal of a heat insulating material according to a fourth embodiment.

FIG. 9 is a cross-sectional view of a lid of an electric pot according to a fifth embodiment.

FIG. 10 is a sectional view of a lid of an electric pot of a sixth embodiment.

FIG. 11 is a sectional view showing a lid of an electric pot of a seventh embodiment.

FIG. 12 is a plan view of a lid of the electric pot of FIG. 11;

FIG. 13 is a sectional view of a lid portion of the electric pot of the eighth embodiment.

FIG. 14 is a sectional view of a lid of an electric pot according to a ninth embodiment.

FIG. 15 is a partial cross-sectional view of a lid of the electric pot of the tenth embodiment.

FIG. 16 is a sectional view of a lid of an electric pot showing an eleventh embodiment.

FIG. 17 is a sectional view of a lid of an electric pot showing a twelfth embodiment.

FIG. 18 is a sectional view of a lid of an electric pot showing a thirteenth embodiment.

FIG. 19 is a sectional view of a lid of an electric pot showing a fourteenth embodiment.

FIG. 20 is a sectional view of a lid part of an electric pot showing a fifteenth embodiment.

FIG. 21 is a sectional view of a lid of an electric pot showing a sixteenth embodiment.

FIG. 22 is a sectional view of a lid part of an electric pot showing a seventeenth embodiment.

FIG. 23 is a sectional view of a lid of an electric pot showing an eighteenth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inner cylinder 2 Outer cylinder 3 Vacuum double container 4 Heater 5 Discharge path 118 Opening 8 Lid 9 Steam passage 11 Vacuum heat insulating space 13 Instrument body 14 Discharge pump 21, 175 Heat insulating layer 51 Upper plate 61, 62 Heat insulating material 62b Heat insulating sheet 66 Metal vacuum insulation 75 Hollow insulation 75a Closed space 76 Aluminum layer

Claims (3)

[Claims] 1. A container having a vacuum double container constituted by an inner cylinder and an outer cylinder, a heater for heating a content liquid in the inner cylinder, a discharge path for guiding the content liquid to the outside, and the discharge path. A discharge pump for discharging the content liquid through the passage, a lid for closing the opening of the vacuum double container and the container, and a vapor passage provided on the lid for discharging steam to the outside, wherein the lid is a synthetic resin frame portion And a metal vacuum heat insulating material fitted thereto, wherein the metal vacuum heat insulating material is provided so as not to block the steam passage. . 2. The electric hot water storage container having a vacuum double container according to claim 1, wherein the lid is pivotally connected to a synthetic resin shoulder by a hinge so that the lid can be opened and closed. 3. The electric hot water container having a vacuum double container according to claim 1, wherein the vacuum heat insulating member is provided so as to be multiplexed with another heat insulating layer provided on the lid.