JPH0519407B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an electric heating container that can simplify the structure of a lid unit of an electric rice cooker, an electric pot, etc., and can heat an inner pot with high thermal efficiency.

<Conventional technology> Conventionally, in electric heating containers such as electric rice cookers and electric pots, an inner container is provided inside an outer case.
An inner pot is provided in which the inner pot is housed, and the inner pot is covered with an inner lid. For example, in an electric rice cooker as such an electric heating container, a lid heater installed in the lid unit heats the inner lid to prevent dew condensation from forming on the underside of the inner lid. It is common practice to heat the pot from the top.

As shown in FIG. 15, the electric rice cooker described above has an inner lid 9' that covers the inner pot 6' and is attached to the lower surface of a lid unit 11' connected to the outer case 1'. A lid heater 8' for heating the inner lid 9' is provided approximately at the center of the lid unit 11'.

More specifically, the lid unit 11'
is connected to the outer case 1' at a hinge portion 12' so as to be openable and closable. And lid unit 1
1' includes a heat sink 13' for heat transfer to the inner lid 9', and a lid seal gasket 14' for protecting electrical components such as the lead wire 10' from steam generated in the inner pot. Each component is provided at a predetermined position.

On the other hand, the space between the inner container provided inside the outer case and the inner pot housed in this inner container is kept airtight, and the electric rice cooker wraps and heats the lower part from the side of the inner pot. A container (see Japanese Patent Publication No. 62-6803) was devised.

For the electric rice cooker mentioned above, on the rim of the inner pot,
In this structure, a flange part that can be placed on the upper edge of the inner container is formed, and a spring means that can bias the inner pot upward is provided in the lower part of the inner pot. By pressing the flange of the inner pot and the upper edge of the inner pot, the space between the inner pot and the inner pot is kept well airtight, and further A heater installed in the inner pot heats the air in the space, so that the lower part of the inner pot can be wrapped around and heated from the sides of the inner pot.

<Problems to be Solved by the Invention> However, in the electric rice cooker including the lid heater 8', the lid unit 11' has a heat sink 1.
3', lid seal packing 14', etc., the structure of the lid unit 11' becomes very complicated, and the number of parts increases, making it impossible to provide an electric rice cooker at a low cost. A problem arose.

Furthermore, in the electric rice cooker, a lid heater 8' is connected from the outer case 1' side to the lid unit 11' side.
Since the lead wire 10' is introduced, the lid unit 11' cannot be removed from the outer case 1'. Therefore, the lid unit 11' must be opened at a location where there is sufficient space, which is disadvantageous in that the installation location is restricted.

Moreover, the lead wire 10' inserted through the hinge portion 12' is repeatedly bent due to the frequent opening and closing action of the lid unit 11'.
Another problem has been that the insulating member covering 0' is easily damaged and the electrical system lacks reliability.

In addition, in electric rice cookers that maintain an airtight state between the inner pot and the inner pot, the inner pot and the inner pot are each made of metal, so even if the flange of the inner pot and the inner pot are pressed together, The flange and the inner container were not in good contact with each other, and the air between the inner container and the inner pot could not be completely sealed. Moreover, if the flange of the mouth edge of the inner pot becomes uneven due to frequent removal and storage of the inner pot, the contact surface between the flange and the upper edge of the inner container may become uneven. A gap was created, and heated air was dissipating from this gap. Therefore,
There were problems in that the inner pot could not be heated efficiently from the side, the rice stored in the inner pot could not be cooked evenly, and the rice could not be cooked deliciously.

This invention was made in view of the above problems, and it is possible to simplify the structure of the lid unit, reduce costs, and improve the reliability of the electrical system, and also to heat the inner pot with high thermal efficiency. The purpose is to provide an electrically heated container that can be heated.

<Means for Solving the Problems> To achieve the above object, the electrically heated container of the present invention includes an inner container provided inside an outer case,
In an electric heating container that has an inner pot housed in the inner container, an inner lid that covers the inner pot, and a lid unit that closes the upper part of the outer case, the inner lid is installed near the mouth edge of the inner container. A heating element for heating is provided, and the peripheral edge of the inner lid is brought into contact with the mouth edge of the inner container so that heat from the heating element can be directly transmitted to the inner lid. It is characterized in that the edge and the inner lid are brought into close contact with each other via a gasket.

A gasket may be provided on the lower surface of the lid unit, which can seal the space surrounded by the lid unit and the inner lid, and the space surrounded by the inner container and the inner pot, respectively.

Furthermore, energization of the heating element may be controlled by a temperature sensor capable of detecting the temperature inside the inner pot.

Furthermore, a handle may be provided at a predetermined position on the upper part of the outer periphery of the inner pot, which extends upward as the lid unit is opened.

In addition, the center portion of the inner lid may be removably engaged with the lid unit, and the engaging portion may be covered by the inner lid so that it is not exposed on the lower surface of the inner lid.

<Function> In the case of an electrically heated container having the above configuration, a heating element for heating the inner lid is provided near the mouth edge of the inner container, and the peripheral edge of the inner lid is brought into contact with the mouth edge of the inner container. Therefore, heat from the heating element is directly transmitted from the mouth edge of the inner container to the inner lid. Therefore, the heat from the heating element can be efficiently transmitted to the inner lid to heat the inner pot, so it is possible to prevent condensation from forming on the bottom surface of the inner lid, and also to prevent the inner pot from being heated from the top. It can be heated.

Furthermore, since the mouth edge of the inner pot and the inner lid are brought into close contact with each other via the packing, it is possible to prevent the steam in the inner pot from leaking outward from between the lid unit and the outer case.

Moreover, since the metal surfaces of the inner pot and the inner lid do not come into direct contact with each other, it is possible to prevent the heat of the inner lid from being transferred to the inner pot, and the inner lid can be heated efficiently.

In addition, when the space surrounded by the lid unit and the inner lid is sealed with a gasket provided on the bottom of the lid unit, it prevents steam from flowing out from other than the pressure adjustment port, reducing heat loss in the inner lid. can be suppressed. Furthermore, if the space surrounded by the inner container and inner pot is sealed, the air in the space surrounded by the inner container and inner pot can be heated without being dissipated outward, and the inner pot can be placed on the side with good thermal efficiency. It can be heated from

Furthermore, in the case where the heating element is energized by a temperature sensor that can detect the temperature inside the inner pot, the heating element is installed near the rim of the inner container that is easily affected by outside air. The temperature of the inner lid can be kept constant at all times, even when

For those with a handle at a predetermined position on the upper outer periphery of the inner pot that extends upward when the lid unit is opened, the height between the rim of the inner pot and the rim of the inner container should be adjusted. Even if they are formed almost identically,
The inner pot can be taken out from the inner container by grasping the handle without having to insert one's fingers into the narrow space between the inner pot and the inner container to pick up the inner pot.

In addition, if the center part of the inner lid is removably engaged with the lid unit and the engaging part is covered by the inner lid so that it is not exposed to the lower surface of the inner lid. , from the heating element to the periphery of the inner lid,
Furthermore, the entire lower surface of the inner lid can be heated up to the vicinity of the center of the inner lid.

<Examples> Hereinafter, examples will be described in detail with reference to the accompanying drawings showing examples.

FIG. 1 is a longitudinal sectional view showing an electric rice cooker as an electric heating container of the present invention. The electric rice cooker is
A cylindrical side member 2 made of a thin metal plate, a bottom member 3 made of synthetic resin formed on the lower side of this side member 2, and a shoulder member 4 made of synthetic resin formed on the upper side of the side member 2. The device is mainly composed of an outer case 1 and a lid unit 11 which is covered on the upper surface of the outer case 1 so as to be openable and closable. and,
A cylindrical inner container 5 is provided inside the outer case 1, and an inner pot 6 for cooking rice is removably housed inside the inner container 5. Note that a heat insulating material 30 is filled between the inner container 5 and the side member 2 to prevent heat radiation. Further, a center sensor 40 is attached to a penetration portion formed at the center of the bottom surface of the inner container 5. Furthermore, the inner pot 6
A hot plate 41 is provided between the bottom surface of the inner pot 5 and the inner pot 5, and an annular bottom heater 42 that directly heats the inner pot 6 is embedded in the hot plate 41 so as to surround the center sensor 40. has been done.

A heating element 8 is provided near the mouth edge 50 of the inner container 5, and the peripheral edge 93 of the inner lid 9 is connected to the inner lid 9 so that the heat from the heating element 8 can be directly transferred to the inner lid 9. It is in contact with the mouth edge 50, and the mouth edge 60 of the inner pot 6 and the inner lid 9 are brought into close contact via the gasket 7.

To be more detailed, as shown in Figure 2,
The inner container 5 has a mouth edge 50 fixed to a flat part 43 formed on the upper surface of the shoulder member 4, and an annular heating element 8 for heating the inner lid 9 on the lower surface of the mouth edge 50. , and is attached in contact with the mouth edge 50.

The heating element 8 is partially buried in the shoulder member 4 and supported with good heat insulation.
A lead wire wired at a predetermined position inside is connected (none of them are shown).

The inner pot 6 is made of metal with high thermal conductivity, and has an annular shape on its mouth edge 60 so that the space in the inner pot 6 is sealed when the inner lid 9 is covered. Packet 7 is attached. The gasket 7 is made of a material with excellent heat resistance and elasticity, such as silicone rubber.

The inner cover 9 is entirely made of a material with high thermal conductivity, for example, metal such as aluminum, and a through hole 18 is formed in the center thereof, and the inner cover 9 is formed in the center of the inner cover 9. A stopper rubber 16 is attached. The inner lid 9 is removably attached to the lid unit 11 by engaging the rod-shaped one-touch pin 15 provided at the center of the lower surface of the lid unit 11 with the inner lid stopper rubber 16. . Furthermore, the peripheral edge part 93 of the inner lid 9 projects and hangs outward so as to be able to come into contact with the mouth edge part 50 of the inner container 5, and also reduces the contact area with the mouth edge part 50 of the inner container 5. It is formed in a shape that can fit along the mouth edge 50 of the inner container 5 so that it can be made wide.

Further, the lower surface of the lid unit 11 has a double structure, and inside thereof there is an inner bottom plate 1 made of synthetic resin.
2, an outer sole plate 13 made of metal is formed on the outside. A recess 120 is formed in a predetermined position of the inner bottom plate 12.
With one end of the gasket 14 embedded in the gasket 20, insert the peripheral edge of the outer sole plate 13 into the gasket 14.
is fixed. Furthermore, the above-mentioned packing 14 is
It protrudes outward along the inner bottom plate 12, and
Its tip 140 is folded inward to provide sufficient elasticity. Then, with the inner lid 9 attached to the lid unit 11, the tip 140 of the gasket 14 is brought into pressure contact with the protrusion 94 of the inner lid 9 to open a space a surrounded by the lid unit 11 and the inner lid 9. It's sealed.

In the above configuration, the heating element 8 for heating the inner lid 9 is provided near the mouth edge 50 of the inner container 5, and the peripheral edge 93 of the inner lid 9 is in contact with the mouth edge 50 of the inner container 5. , heat from the heating element 8 is directly transmitted from the mouth edge 50 of the inner container 5 to the inner lid 9. Then,
Since the heat from the heating element 8 can be efficiently transferred to the inner lid 9 to heat the inner pot 6, it is possible to prevent dew condensation from forming on the lower surface of the inner lid 9, and also to prevent the inner pot 6 from forming on the upper surface. It can also be heated from
Furthermore, since the mouth edge 60 of the inner pot 6 and the inner lid 9 are brought into close contact with each other via the gasket 7, the space between the inner pot 6 and the inner lid 9 can be sealed, and the lid unit 11 and the outer lid can be sealed. Steam in the inner pot 6 can be prevented from leaking outward from between the inner pot 6 and the case 1. Furthermore, since the metal surfaces of the inner pot 6 and the inner lid 9 do not come into direct contact, the heat of the inner lid 9 can be prevented from being transferred to the inner pot 6, and only the inner lid 9 can be efficiently heated.

Furthermore, since the inner lid 9 can be heated from the outer case 1 side, the lid unit 11 includes not only a conventional lid heater 8' but also a lead wire 10', a heat sink 13', a lid seal packing 14', etc. The number of parts can be reduced significantly. Therefore, the structure of the lid unit 11 can be greatly simplified, and the cost of the electric rice cooker can be reduced.

Moreover, since the lid heater 8' is not required, the lid unit 11 can be made lighter, and
There is no need to introduce a lead wire into the lid unit 11, and the lid unit 11 can be connected to the outer case 1.
A completely removable structure can be adopted. As a result, even in places where the space above the electric rice cooker is narrow, the lid unit 11 can be easily removed from the outer case 1, and the installation location is not restricted. Furthermore, the conventional problem of damage to the lead wires due to the opening and closing operations of the lid unit 11' can also be solved.

As shown in FIG. 3, there is a gasket 14 on the lower surface of the lid unit 11 that can seal the space a surrounded by the lid unit 11 and the inner lid 9 and the space C surrounded by the inner container 5 and the inner pot 6, respectively. may be provided. More specifically, a heating element 8 for heating the inner lid 9 is provided near the mouth edge 50 of the inner container 5, and the peripheral edge 93 of the inner lid 9 is brought into contact with the mouth edge 50 of the inner container 5. The heat from the heating element 8 is transmitted to the mouth edge 5 of the inner container 5.
The gasket 14 is attached to a predetermined position on the lower surface of the lid unit 11, and has a hanging portion 142 formed at its tip. A stepped portion 4 that rises above the flat portion 43 of the shoulder member 4
The tongue piece 141 is formed so as to be able to come into contact with the protrusion 94 of the inner cover 9, and is further branched downward from a midway position of the packing 14 to form a tongue piece 141 that can come into contact with the protrusion 94 of the inner lid 9. and,
When the lid unit 11 is covered with the outer case 1, the hanging portion 142 comes into pressure contact with the step portion 44, so that the space between the lid unit 11 and the shoulder member 4 can be sealed, and the above content can be achieved. A space C surrounded by the container 5 and the inner pot 6 can be sealed. Therefore, the air in the space C can be heated without being dissipated outward, and the inner pot 6 can be heated from the side with good thermal efficiency. Further, by the tongue piece 141 coming into pressure contact with the protrusion 94 of the inner lid 9, the lid unit 11
Since the space a surrounded by the inner cover 9 and the inner cover 9 can also be sealed, steam can be prevented from flowing out from other than the pressure regulating port 10, and heat loss of the inner cover 9 can be suppressed.

In addition to heating from the top surface of the inner pot 6, the entire surface of the inner pot 6 can be heated, the rice stored in the inner pot 6 can be cooked evenly, and the rice can be cooked even more deliciously. Moreover, even if there is a dimensional error between the inner container 5 and the peripheral edge 93 of the inner lid 9 or a deformation of the peripheral edge 93 of the inner lid 9, the inner container 5 and the inner pot 6 can be separated by the packing 14. The airtight state of the space C surrounded by can be reliably maintained for a long period of time.

Furthermore, in the electric rice cooker described above, if the temperature of the inner lid 9 is generally kept higher than the temperature of the rice in the inner pot 6, condensation will not form on the lower surface of the inner lid 9.
The energization of the heating element 8 may be controlled by a temperature sensor (not shown) capable of detecting the temperature inside the inner pot 6. For example, if the temperature of rice is set to 72°, when the temperature sensor detects 72°,
The heating element 8 is controlled by means such as a microcomputer so that the temperature of the inner lid 9 reaches approximately 75° after being energized for 10 minutes.
Although it is provided near the mouth edge 50 of
The temperature of the inner lid 9 can be kept constant at all times,
It is possible to prevent dew condensation from forming on the lower surface of the inner lid 9.

Furthermore, as shown in FIG.
0 so that the heat from the heating element 8 is directly transmitted from the mouth edge 50 of the inner container 5 to the inner lid 9,
When the lid unit 11 is covered with the outer case 1, the mouth edge 60 of the inner pot 6 touches the inner bottom 12 of the lid unit 11.
The tip 70 of the gasket 7 is formed so as to be located directly below the inner pot 6 and is attached to the mouth edge 60 of the inner pot 6.
can also be formed to protrude inward from the inner pot 6. In this case, even if the user forgets to attach the inner lid 9 to the lid unit 11 due to his carelessness and cooks rice, this can be adequately dealt with. That is, since the tip 70 of the gasket 7 is pressed upward by the internal pressure within the inner pot 6 and comes into pressure contact with the inner bottom 12 of the lid unit 11 (as shown by the broken line in FIG. 4),
Steam can be prevented from leaking outward from between the inner pot 6 and the lid unit 11. Note that during normal rice cooking, the space a surrounded by the lid unit 11 and the inner lid 9 is reliably sealed by the gasket 14 provided at a predetermined position on the inner bottom 12, so there is no problem at all. do not have.

Furthermore, as shown in FIG.
0 so that the heat from the heating element 8 is directly transmitted from the mouth edge 50 of the inner container 5 to the inner lid 9,
Fixing members 7 such as screws are attached to the upper and lower surfaces of the protrusion 94 of the inner lid 9.
The gaskets 71 and 72 may be fixed by the screws 3. In this case, the space a between the mouth edge 60 of the inner pot 6 and the inner lid 9 and the space a surrounded by the inner lid 9 and the lid unit 11 is reliably sealed by the gaskets 71 and 72, respectively. be able to. Furthermore, the above-mentioned gaskets 71 and 72 are not only easy to attach to the inner cover 9, but are also fixed with fixing members 73 such as screws, so that they do not come off from the inner cover 9 during use. It is also possible to wash the inner lid 9 together.

Further, as another embodiment, as shown in FIGS. 6 and 7, for example, in the embodiment shown in FIG. A handle 61 extending upward may also be provided. In more detail,
The inner pot 6 is provided at least at two opposing locations on its outer periphery with a spring means 63 made of a coil spring or the like that can move the handle 61 upward, and a storage section 62 that stores the spring means 63. There is. The handle 61 is housed in the housing section 62 in a state where it is biased by a spring means 63, and is attached vertically by a connecting member 64 such as a rivet that is inserted into an elongated hole 65 formed in the lower part of the handle 61. It is attached so that it can be moved in the direction. When the lid unit 11 is covered with the outer case 1, the handle 61 is pressed by the inner lid 9 attached to the lower surface of the lid unit 11, and the handle 61 is substantially flush with the mouth edge 60 of the inner pot 6. When the lid unit 11 is opened,
is urged upward by the elastic force of the spring means 63;
Moves above the mouth edge 60 of the inner pot 6 (7th
(dashed line shown in figure). In addition, as the above-mentioned handle 61,
For example, if the inner pot 6 is advanced about 10 mm to 15 mm upward from the mouth edge 60, it can be sufficiently gripped, and the inner pot 6 can be grasped without touching the rice grains attached to the mouth edge 60 of the inner pot 6. Can be lifted.

Therefore, even if the height of the rim 60 of the inner pot 6 is made low so that it is approximately the same height as the rim 50 of the inner container 5, the inner pot 6 and the inner container 5 are By grasping the handle 61, the inner pot 6 can be easily taken out from the inner container 5 without having to insert a finger into the narrow gap between the inner pot and the inner pot 6 to take the inner pot 6 out. In addition, since the height of the inner pot 6 can be reduced, the electric rice cooker can be made smaller, and the distance between the protrusion 94 of the inner lid 9 that closes the top surface of the inner pot 6 and the peripheral edge 93 It is possible to make the inner pot 6 shorter, which in turn reduces the amount of material used for the inner pot 6, and it is possible to reduce the cost of the electric rice cooker as a whole. Moreover, by reducing the material used for the inner cover 9, heat loss from the heating element 8 to the inner cover 9 can be reduced, and the inner cover 9 can be heated efficiently. Note that the upper part of the inner pot 6 is squeezed inward to attach the mounting part 66.
When the handle 61 is formed so as to be able to be stored in the attachment portion 66, the handle 61 can be attached to the inner pot 6 without increasing the outer diameter of the outer case 1.

In yet another embodiment, the center portion of the inner lid 9 is removably engaged with the lid unit 11, and the engaging portion consisting of the inner lid retaining rubber 16 and the one-touch pin 15 that engages with the inner lid stopper rubber 16 is configured to be removably engaged with the lid unit 11. , may be covered by the inner lid 9 so as not to be exposed to the lower surface of the inner lid 9. More specifically, as shown in FIG. 8, in the embodiment shown in FIG. The inner cover 9 has no through hole 18 or inner cover stopper rubber 16 provided in the central part thereof. A one-touch pin 15 is fixed to the upper surface of the inner lid 9 so as not to be exposed on the lower surface of the inner lid 9. Further, an inner lid stopper rubber 16 is attached to the center of the inner bottom 12 of the lid unit 11, with which the one-touch pin 15 engages. Therefore, even when the inner cover 9 is attached to the cover unit 11, the one-touch pin 15 is not exposed on the lower surface side of the inner cover 9, and the entire lower surface of the inner cover 9 is made of a metal surface, so that the heating element 8 to the peripheral edge 93 of the inner lid 9 via the mouth edge 50 of the inner container 5.
Furthermore, the entire lower surface of the inner lid 9 can be heated up to the vicinity of the center of the inner lid 9. and,
It is possible to prevent the occurrence of dew condensation, and it is also possible to prevent the rice in the inner pot 6 from becoming partially white, and it is possible to maintain a good heat retention state for a long period of time.

Further, in the inner lid 9, the lower surface member 90 is formed of a metal having high thermal conductivity, such as aluminum, and the upper surface member 91 is formed of a metal having low thermal conductivity.
For example, it may be formed of synthetic resin such as polypropylene, and furthermore, a lower surface member 90 is provided in the middle part of the inner lid 9.
It may be filled with a heat insulating material 92 for preventing heat radiation from to the upper surface member 91 side. In this case, a one-touch pin 15 integrally formed with the upper surface member 91 is provided in the center of the upper surface member 91 side, and the periphery of the one-touch pin 15 is fixed by a metal fixing member 17 with high thermal conductivity. Furthermore, by providing the inner lid stopper rubber 16 on the lid unit 11 side, the lid unit 1 can be removed from the lower surface member 90.
Heat dissipation to the first side can be prevented, and the temperature distribution in the vicinity of the center part and the vicinity of the peripheral part 93 of the inner lid 9 can be made uniform (see FIG. 9). Therefore,
The rice in the inner pot 6 can be uniformly heated or kept warm from the inner lid 9 side, and partial discoloration and drying of the rice can be prevented.

It is also possible to attach the one-touch pin 15 to the inner bottom 12 on the side of the lid unit 11 and to provide an inner lid stopper rubber 16 on the upper surface member 91 on the inner lid 9 side (see FIG. 10).

Next, as an example of changing the vicinity of the mouth edge 50 of the inner container 5, as shown in FIG. The heating element 8 is placed on the shoulder member 4 in contact with the lower surface of the annular body 80, and the heat of the heating element 8 is directly transferred from the mouth edge 50 of the inner container 5 to the inner lid 9. It may also be transmitted. In this case, by bringing the peripheral edge 93 of the inner lid 9 into contact with the upper surface of the annular body 80, heat can be transferred from the heating element 8 to the peripheral edge 93 of the inner lid 9.
The entire surface of the inner lid 9 can be heated or heated. Furthermore, since the space between the inner lid 9 and the inner container 5 can be sealed by the annular body 80, the dissipation of the heated air in the space C surrounded by the inner container 5 and the inner pot 6 can be reliably prevented. can do. Further, by recessing the upper surface of the annular body 80 to form an annular groove 81, for example, the mouth edge 50 of the inner container 5 can be
Even if the sticky substance spills in the vicinity, the sticky substance can be collected in the annular groove 81, so that the sticky substance will not spill into the space C surrounded by the inner container 5 and the inner pot 6, and will not spill on the sides and bottom of the inner container 5. It will not stick to the surface. Therefore, burning of the inner container 5 can be prevented. Furthermore, since the mouth edge 50 of the inner container 5 is covered by the annular body 80, there is no risk of the vicinity of the mouth edge 50 of the inner container 5 getting rusty, and the appearance when the lid unit 11 is opened is also reduced. The appearance is also very good.

Further, as another example of modification, there is one shown in FIG. 12. The embodiment shown in FIG.
Similar to what is shown in the figure, the heat of the heating element 8 is transferred to the inner container 5.
A handle 61 is provided at a predetermined position on the upper part of the outer periphery of the inner pot 6 so as to be able to move upwardly. In particular, a major difference from the embodiment shown in FIG. 7 is that an annular body 80 is attached near the mouth edge 50 of the inner container 5. Further, the annular body 80 has the heating element 8 embedded therein and is formed in a shape along the shoulder member 4, and by widening the contact area between the inner container 5 and the shoulder member 4, there is a gap between the inner container 5 and the shoulder member 4. is securely sealed.
Therefore, heated air in the space C surrounded by the inner container 5 and the inner pot 6 can be prevented from dissipating outward from between the inner container 5 and the shoulder member 4.

Furthermore, as another modification, as shown in FIG. 13, the heating element 8 may be held between an annular body 80 provided near the mouth edge 50 of the inner container 5 and the mouth edge 50. More specifically, an annular recess 51 is formed near the mouth edge 50 of the inner container 5, and the heating element 8 is housed in the recess 51, so that the heat of the heating element 8 is transferred to the inner container 5. It is adapted to be transmitted directly from the mouth edge 50 to the inner lid 9. A plurality of through holes 52 are formed at predetermined positions of the recess 51, and a guide plate 53 is provided below the through hole 52, partially hanging from the recess 51. Further, an elastic tongue portion 82 is formed on the lower surface of the annular body 80. Moreover, since the tongue portion 82 has a meshing portion 86 that prevents it from coming out when inserted into the through hole 52, the tongue portion 82 can be aligned along the guide plate 53 and inserted into the through hole 52.
By inserting it into the inner container 5, the meshing portion 86 is inserted into the inner container 5.
The annular body 80 can be fixed to the mouth edge 50 of the inner container 5 while meshing with the mouth edge of the through hole 52 and sandwiching the heating element 8 . Furthermore, by forming the annular groove 81 on the upper surface of the annular body 80, the eleventh
Similar to the modification shown in the figure, it is possible to prevent the sticky substance from spilling into the inner container 5. In addition, since the annular body 80 can cover the vicinity of the mouth edge 50 of the inner container 5, the mouth edge 50 of the inner container 5 can be covered with the annular body 80.
Even if rust or corrosion occurs on the 0, it can be prevented from being exposed to the outside.

In addition, as shown in FIG. 14, the heating element 8 is covered with a metal covering material 84, and the shoulder member 4 and the annular body are covered with a surrounding part 85 of the heating element 8 exposed upward. The covering material 84 may be sandwiched between the inner container 80 and the inner lid 9 so that the heat of the heating element 8 is directly transmitted from the mouth edge 50 of the inner container 5 to the inner lid 9. In this case, the peripheral edge 93 of the inner lid 9 can be brought into direct contact with the metal surrounding portion 85, so that the inner lid 9 can be heated with good heat conduction. Moreover, not only is the mouth edge 50 of the inner container 5 engaged with the inner peripheral side of the annular body 80, but also the back side of the engaging portion is fixed to the shoulder member 4, so that the heat generation is prevented. The inner container 5 and the shoulder member 4 can be connected while the body 8 is being held between them.

Note that the electric heating container of the present invention is not limited to the above embodiment, and for example, a plurality of heating elements 8 may be provided. Furthermore, a side heater for side heating is provided at a position halfway on the side wall of the inner container 5, and this side heater and the bottom heater 4
Adjustment of rice cooking, heat retention, etc. by the heating element 2 and the heating element 8 can be efficiently performed by microcomputer control, and various other design changes can be made without changing the gist of the invention.

<Effects of the Invention> As is clear from the above description, in the electrically heated container according to claim 1 of the present invention, a heating element for heating the inner lid is provided near the mouth edge of the inner container, and Since the part is in contact with the mouth edge of the inner container,
Heat from the heating element is directly transmitted from the mouth edge of the inner container to the inner lid. Therefore, the heat from the heating element can be efficiently transferred to the inner lid to heat the inner pot, so it is possible to prevent condensation from forming on the bottom surface of the inner lid, and also to prevent the inner pot from being heated from the top. It can be heated.

Furthermore, since the mouth edge of the inner pot and the inner lid are brought into close contact with each other via the packing, it is possible to prevent the steam in the inner pot from leaking outward from between the lid unit and the outer case.

Furthermore, since the metal surfaces of the inner pot and the inner lid do not come into direct contact, it is possible to prevent the heat of the inner lid from being transferred to the inner pot, and the inner lid can be heated efficiently. Therefore, there is no need to provide conventional parts such as a lid heater in the lid unit, and the number of parts in the lid unit can be significantly reduced. Therefore, the structure of the lid unit can be made very simple, and the cost of the electrically heated container can be reduced.

Furthermore, since the lid heater is no longer required, there is no need to introduce lead wires into the lid unit, and the lid unit can be completely removed from the outer case, allowing it to be installed in tight spaces. However, it is now possible to install an electrically heated container. Further, it is possible to provide an electric heating container that can improve the reliability of the electrical system without the risk of damaging the lead wires due to the opening and closing operations of the lid unit.

Furthermore, in the electric heating container according to claim 2, the space surrounded by the lid unit and the inner lid is sealed by the gasket provided on the lower surface of the lid unit, so that steam does not flow out from other than the pressure regulating port. This prevents heat loss from the inner lid. Furthermore, since the space surrounded by the inner container and inner pot is sealed,
To heat the air in a space surrounded by an inner container and an inner pot without dissipating it to the outside regardless of dimensional errors between the two, and to heat the inner pot by enveloping it from the side with good thermal efficiency. Therefore, it becomes possible to perform so-called oven cooking, and in addition to heating from the top surface of the inner pot, the entire surface of the inner pot can be heated, and delicious rice etc. can be cooked evenly.

Furthermore, regarding the electric heating container of claim 3,
The heating element is energized by a temperature sensor that can detect the temperature inside the inner pot, so even though it is located near the rim of the inner pot, which is easily affected by outside air, it is always on. The temperature of the inner lid can be kept constant, and dew condensation can be prevented from forming on the lower surface of the inner lid.

In the electric heating container according to claim 4, a handle is provided at a predetermined position on the upper part of the outer periphery of the inner pot, which extends upward as the lid unit is opened, so that the rim of the inner pot and the mouth of the inner container are connected. Even if the height is made low so that it is approximately the same height as the edge, it is possible to remove the inner pot without having to insert your finger into the narrow space between the inner pot and the inner container. By grasping the handle, the inner pot can be easily taken out from the inner container.

In the electric heating container according to claim 5, the central part of the inner lid is removably engaged with the lid unit, and the engaging part is covered by the inner lid so that it is not exposed on the lower surface of the inner lid. Because of this, it is possible to heat the entire bottom surface of the inner lid from the heating element to the periphery of the inner lid, and even to the vicinity of the center of the inner lid.
It has an extremely excellent effect of reliably preventing dew condensation and maintaining a good heat retention state for a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal cross-sectional view showing one embodiment of the electrically heated container of the present invention, FIG. 2 is an enlarged cross-sectional view of main parts showing the vicinity of the mouth edge of the inner container, and FIGS. 3 to 5 are FIG. 6 is an enlarged perspective view of the main part showing another embodiment; FIG. 7 is an enlarged sectional view of the main part of FIG. 6; FIGS. The figures are enlarged cross-sectional views of main parts showing still other embodiments, and Figs.
FIG. 4 is an enlarged cross-sectional view of a main part showing a modified example of the vicinity of the mouth edge of the inner container, and FIG. 15 is a partial vertical cross-sectional view showing a conventional electric heating container. 1...outer case, 5...inner container, 6...inner pot,
7, 14...Packskin, 8...Heating element, 9...Inner lid, 11...Lid unit, 61...Handle, a...
A space surrounded by the lid unit and the inner lid, C...a space surrounded by the inner container and the inner pot.

Claims (1)

[Scope of Claims] 1. An inner container provided inside an outer case, an inner pot accommodated in the inner container, an inner lid that covers the inner pot, and a lid unit that closes the upper part of the outer case. In the electrically heated container, a heating element for heating the inner lid is provided near the mouth edge of the inner container, and a peripheral edge of the inner lid is provided so that heat from the heating element can be transferred to the inner lid. An electric heating container, characterized in that the container is in contact with the rim of the inner container, and the rim of the inner pot and the inner lid are brought into close contact with each other via a gasket. 2. The electric heating according to claim 1, wherein a gasket is provided on the lower surface of the lid unit to seal the space surrounded by the lid unit and the inner lid, and the space surrounded by the inner container and the inner pot. container. 3. The electric heating container according to claim 1, wherein the heating element is energized by a temperature sensor capable of detecting the temperature inside the inner pot. 4. The electric heating container according to claim 1, wherein a handle is provided at a predetermined position on the upper outer periphery of the inner pot, the handle extending upward as the lid unit is opened. 5. The central part of the inner lid is removably engaged with the lid unit, and the engaging part is covered by the inner lid so that it is not exposed to the lower surface of the inner lid. The electric heating container according to item 1.