JPH0748184Y2 - Electric rice cooker - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to an electric rice cooker. In particular, this invention relates to an electric rice cooker whose inner container has a vacuum double structure.

[0002]

2. Description of the Related Art Conventionally, attempts have been made to make the inner container of an electric rice cooker a vacuum double structure in order to improve the efficiency of rice cooking and the efficiency of heat retention. The vacuum double structure is a structure in which an inner unit and an outer unit are doubled to form a vacuum chamber inside. Since such a structure has a high heat insulating and heat retaining effect, it is widely used in thermos bottles and the like.

[0003]

Although the vacuum double structure has a high heat insulating effect as described above, the following problems have hitherto been adopted in the inner container of the electric rice cooker. That is, in the electric rice cooker, the temperature sensor and the rice cooking heater must be arranged at the inner bottom portion of the inner container, and when the inner container has a vacuum double structure, it becomes difficult to attach the temperature sensor and the rice cooking heater, The drawback is that it takes time to assemble.

A lead wire connected to a temperature sensor arranged on the inner bottom portion of the inner container is connected to a control circuit, and a lead wire for supplying power to the rice cooking heater is connected to the control circuit and power supply terminal outside the inner container. In order to connect to the above, an opening for passing the lead wire or the like must be formed at the bottom of the inner container. Therefore, even if the side surface of the inner container has a vacuum double structure, heat is released from the bottom opening, which lowers rice cooking efficiency and heat retention efficiency. Etc.

This invention was made against the background of such a conventional technique, and the inner container has a vacuum double structure and the shape and / or structure of the inner container is devised so that the heat insulating effect is substantially high. , An energy-saving type electric rice cooker with low power consumption is provided.

[0006]

The invention is an electric rice cooker including an inner container for accommodating an inner pot, a temperature sensor and a rice heating heater unit provided on an inner bottom portion of the inner container. The container has a double structure consisting of an inner unit and an outer unit each having a bottomed container shape without holes, and only the upper edges of the inner unit and the outer unit are joined together. Is evacuated, a fixture is provided on the inner bottom surface of the internal unit, and a rice cooker heater unit is attached to the fixture so that it can be vertically displaced.
It is attached to the rice cooking heater unit so that it can be moved vertically.
A temperature sensor is attached, and the inner pot is stored in the inner container.
When it is delivered, the rice cooker unit is set by the bottom of the inner pot.
Is pushed down, and the upper flange of the inner pot is the inner container.
Abutting against a shoulder member attached to the upper edge of the inner container
So that a closed space is formed between the inner unit and the inner pot
And it is characterized in that it is in.

Further, according to the present invention, in the electric rice cooker, a vertical groove for accommodating a lead wire is formed in the inner unit from the bottom surface to the upper edge portion, and is connected to a temperature sensor and a rice cooking heater. The lead wire is characterized in that it is wired in the vertical groove and guided to the outside of the inner container. Furthermore, the invention is characterized in that, in the electric rice cooker, both the inner unit and the outer unit forming the inner container are made of metal.

Further, the present invention is characterized in that, in the electric rice cooker, a heat retaining function is further provided in the inner container.

[0009]

[Action] Since the inner container is Ru vacuum double structure der in which the shape of the container completely without holes bottomed, high adiabatic heating effect can be obtained.
Also, the rice cooking heater unit provided on the inner bottom surface of the inner container
Are movable up and down. By doing this, the inner container
Can the inner pot is housed within, rice heat by the bottom surface of the inner pot
The data unit is pushed down. In this state,
The top flange of the pan is attached to the top edge of the inner container.
Abut the shoulder member. Therefore, close it between the inner pot and the inner container.
The created space is formed. As a result, the rice heating heater emits
Heat does not escape from the bottom of the inner container, etc.
Because the space between the container and the inner pot is closed, the rice cooking effect
The fruit and heat retention effect can be improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some embodiments of the present invention will be described in detail below with reference to the drawings. Figure 1
It is a schematic side half cross-sectional view for explaining the structure of the electric rice cooker according to an embodiment of the present invention. The electric rice cooker according to this embodiment includes a main body 71, a lid unit 86 for covering an upper opening of the main body 71, and an inner pot 84 housed in the main body 71.

The main body 71 has a cylindrical cover member 72 formed of a thin metal plate forming an outer side thereof, an inner container 73 forming an inner side thereof, an upper edge portion of the cover member 72 and the inner container 7.
3 is connected to the upper edge of the main body 71 to form a shoulder of the main body 71, and the lower edge of the cover member 72 is fitted to the main body 7.
Bottom member 75 forming the bottom of the first unit. And
In this embodiment, the inner container 73 is double formed of an inner container 76 and an outer container 77 made of metal such as stainless steel, and a vacuum inner space 78 is provided between the inner container 76 and the outer container 77. Has been formed. Moreover, the inner unit 76 and the outer unit 77 each have a bottomed container shape having a bottom and an upper opening, and a flange portion 79 protruding outward in the upper opening, and having no holes. The inner unit 70 and the outer unit 77 are joined by welding at the flange portion 79. If the inner container 73 has such a configuration, unlike the above-described embodiment, the welding portion in the inner container 73 can be only the upper edge portion, the number of welding portions is small, the structure is simple, and the manufacturing is performed. It is possible to make the inner container easy. This is one of the features of this embodiment.

By the way, the inner container 73 as in this embodiment
When adopting, it is difficult to attach the temperature sensor 80, the heating plate 81 and the rice cooking heater unit 83 including the rice cooking heater 82 to be arranged on the inner bottom surface of the inner container 73, and the temperature sensor 80 and the rice cooking heater 82 are connected. It is difficult to process the lead wires. Therefore, conventionally, it was difficult to attach the temperature sensor 80, the rice cooking heater unit 83, and the like to the structure of the inner container 73 as in this embodiment only by simply thinking of it. Therefore, in the present invention, a mounting structure described later is adopted.

The electric rice cooker shown in FIG. 1 will be further described. The inner pot 84 is housed in the inner container 73, the bottom surface of which is placed on the rice cooking heater unit 83, and the temperature sensor 8
Touch 0. The bottom member 75 has an electric circuit board 85.
Is built in. The electric circuit board 85 includes a power supply circuit and a control microcomputer, and controls energization of the rice cooking heater unit 83.

The lid unit 86 is a shoulder member 74 of the main body 71.
It is detachably attached to. Lid unit 86
Is provided with a pan lid 87 for closing the upper opening of the inner pan 84 when closed. Further, the lid unit 86 includes a heat radiating plate 8 made of a metal plate which forms the back surface thereof.
7, a heat retaining heater 8 for heating the heat radiating plate 87.
8 are provided.

Further, as shown in FIG. 2, the shoulder member 74 is provided with a horizontal portion 741 and an auxiliary convex portion 742 provided on the lower side thereof, and the horizontal portion 741 and the auxiliary convex portion 7 are provided.
The above-mentioned flange portion 79 of the inner container 73 is fitted between the flange portion 42 and 42. In this case, the shoulder member 74 is formed by setting the upper surface of the auxiliary convex portion 742 as an inclined surface having an upward slope with respect to the rightward rotation direction.
When the flange portion 79 of the inner container 73 is fitted to the inner container 73, the inner container 73 can be fitted while rotating, and moreover, the inner container 73 and the shoulder member 74 can be fitted firmly without rattling. You can

FIG. 3 is a schematic sectional view showing a specific example of the structure of the temperature sensor 80. Referring to FIG. 3 ,
A holding metal member 801 is built in the temperature sensor 80, and a sensor element 802 is embedded above the holding metal member 801. Further, a reed switch 803 and a magnet 804 are held below the holding metal member 801 at regular intervals. Further, a shield plate 805 is provided to shield the magnetic force between the reed switch 803 and the magnet 804 when the entire temperature sensor 80 including the holding metal piece 801 is lowered. Therefore, the holding metal fitting 801
, The reed switch 803 senses the magnetic force of the magnet 804 and is turned on, for example. On the other hand, when the inner pot 84 is stored and the temperature sensor 80 is entirely pushed down by the bottom of the pot, a shield plate 805 is placed between the reed switch 803 and the magnet 804.
, The reed switch 803 does not feel the magnetic force of the magnet 804, and is switched off, for example. In this way, the presence or absence of the inner pan 84 is detected by the reed switch 803. The temperature sensor 80 will be described later.
So that the sensor holding bracket 136 and the coil spring 137
Is attached to the rice cooking heater unit 83 via
It

FIG. 4 is a side sectional view showing a detailed structure of an electric rice cooker according to an embodiment of the present invention, showing a sectional structure of the left half. In summary, the features of the embodiment shown in FIG. 4 are such that the rice cooking heater unit 83 is vertically displaceable, and when the inner pot 84 is housed in the inner container 73, it is Rice cooking heater unit 8
3 is pushed down, and the upper end flange portion 8 of the inner pan 84
8 is a shoulder member 74 attached to the upper edge of the inner container 73.
The flange portion 88 and the shoulder member 74, and
That is, the structure is such that a closed space can be formed .

More specifically, a fixing member 131 is fixed to the inner bottom surface of the inner container 76 of the inner container 73 by welding. On the other hand, the rice cooking heater unit 83 includes the hot plate 8
1 and a rice cooking heater 82 embedded in the heating plate 81, and a coil spring 132 is arranged on the lower surface side thereof, and a mounting bracket 133 is provided at the lower end of the coil spring 132.
Are connected. Then, the mounting bracket 133 and the fixing bracket 131 are fixed by screws 134. Therefore,
The rice cooking heater unit 83 is elastically held via a coil spring 132. Further, a stopper fitting 135 is fixed to the rice cooking heater unit 83, and the inner pot 8
When 3 is not housed, the rice cooking heater unit 83 is regulated by the coil spring 132 so as not to rise too high. Further, in this embodiment, the temperature sensor 80 has the sensor holding fitting 13 at the center of the heating plate 81.
6 and the coil spring 137. Therefore, the temperature sensor 80 itself can be displaced up and down by the action of the coil spring 137 independently of the rice cooking heater unit 83. Moreover, the rice cooking heater unit 83
It goes up and down as it moves up and down.

When the rice cooking heater unit 83 has such a structure, when the inner pan 84 is housed in the inner container 73, the bottom surface of the inner pan 84 pushes down the rice cooking heater unit 83. Then, the inner pot 84 has an upper flange portion 8
8 is stored while being locked by the shoulder member 74. Therefore, the flange portion 88 of the inner pot 84 and the shoulder member 74 surely come into contact with each other, and the inner container 76 of the inner container 73 and the inner pot 84 come into contact with each other.
It becomes the closed heating space 89, and the heat of the rice cooking heater 82 does not escape from above. In addition, the inner container is as described above.
As it is a bottomed cylindrical container with no holes at its bottom,
The heat generated by the rice cooking heater unit 83 is directed downward and sideways.
The inner pot 84 can be efficiently heated without escaping. So
Then, the flange portion 88 of the inner pan 84 described above and the shoulder are shoulders.
It contacts the member 74, and the space between the inner container 76 and the inner pan 84 is closed.
And the structure that becomes the heating space 89
Use an electric rice cooker with low power consumption and high energy saving effect
be able to.

FIG . 5 is a side sectional view showing the wiring processing structure of the lead wire of the temperature sensor and the lead wire of the rice cooker applicable to the embodiment described in FIG. 4 , and FIG. 6 is an enlarged view of the shoulder member 74. FIG. 7 is a perspective partial plan view taken along the line BB in FIG.

Next, referring to FIGS. 5 , 6 and 7 , the lead wire 107 connected to the rice cooking heater 84 will be described.
Is disposed in the vertical groove 141 formed in the inner container 76 of the inner container 73, is guided upward along the inner container 76, and has a shoulder member 74.
Via the lead wire insertion groove 142 formed in the inner container 73
And the cover member 72. And
The lead wire 107 is electrically connected to the circuit board 85 housed in the bottom member 75.

The reason for this construction is that the inner container 73
However, this is because it is a bottomed double-walled container having no holes at all, and a lead wire insertion hole cannot be formed at the bottom of the inner container 73. Since the lead wire 107 guided along the inner side surface of the inner container 76 is housed in the vertical groove 141, the lead wire 107 does not protrude from the inner surface of the inner container 76, and the inner container 76 and the inner pot 84 are not connected to each other. It is not necessary to form the gap of (1) to be particularly large. Moreover, since the gap between the inner container 76 and the inner container 84 may remain narrow, the heat generated by the rice cooking heater unit 83 can be effectively transferred from the peripheral side surface of the inner pot 84 to the inner pot 84.

Further, as shown in FIG. 7 , the lead wire 107 is housed in the vertical groove 141, and the lead wire cover 1 is provided above the lead wire 107.
Since it is covered with 43, even if the inner pot 84 is frequently taken in and out, there is no fear of catching the lead wire 107 or damaging the lead wire 107 . Na us, omit lead cover 143 may be employed a wiring structure for fixing the lead wire 107 with an adhesive or the like in a longitudinal groove 141.

The lead wire of the temperature sensor 80 is also wired in the same manner as the lead wire 107. In the embodiment shown in FIG. 5 , the end 108 of the rice cooking heater 82 is bent outward in the lateral direction, and the lead wire 107 is connected thereto. By bending and arranging in the direction, rice cooking heater unit 83
It is possible to lower the storage space of. The end 108 of the rice cooking heater 82 may be bent inward in the lateral direction.

FIG. 8 is a schematic sectional view showing a preferred insulation heater mounting structure to an electric cooker equipped with inner container of stainless vacuum double structure according to an embodiment of this invention. When the inner container of stainless steel vacuum double structure is adopted,
As in the case of the conventional inner container made of a single plate, even if the heat retaining heater is wound around the outer surface of the inner container, the heat generated by the heat retaining heater is not transferred to the inside of the inner container, and the effect of providing the heat retaining heater is not provided.

Therefore, when the stainless steel vacuum double structure inner container is adopted, the attachment structure of the heat retention heater must be devised. In FIG. 8 , a dedicated pan bottom container 152 is arranged to attach the heat retention heater 51.
Pan bottom container 152 is disposed within the lower of the inner container 5, insulation heater 151 is Ri attached taken at its upper end peripheral edge.
The pot bottom container 152 holds the warming heater 151, surrounds a part of the side and the lower part of the rice cooking heater unit 14, and divides a gap between the rice cooking heater unit 14 and the inner container 5 to separate the rice cooking heater unit 14. The heat generated is transferred to the inner pot more effectively.

In addition, it should be noted that the present invention can be modified in various ways within the scope of the claims.

[0028]

As described above, according to the present invention, since the inner container having the bottomed vacuum double structure without holes is provided, the heat generated by the rice cooking heater does not escape to the lower part of the inner container or the like. ,
Efficiently transmitted to the inner pot. Also, store the inner pot in the inner container
The bottom part of the inner pot, push down the rice cooking heater unit.
And the flange of the inner pot contacts the shoulder member,
A closed space is formed between the two. Therefore,
The heat generated by the heater also escapes from the upper edge of the inner container.
There is no. Therefore, the heat generated by the rice cooking heater may cause
The inner pot can be heated efficiently,
It is possible to provide an electric rice cooker with high heat retention efficiency.

[Brief description of drawings]

FIG. 1 is a schematic side sectional view showing an overall structure of an electric rice cooker according to an embodiment of the present invention.

FIG. 2 is a perspective view for explaining the structure of a shoulder member in the above embodiment.

FIG. 3 is a sectional view showing a specific structure of a temperature sensor 80 .
It is a figure.

FIG. 4 is a structure of an electric rice cooker according to an embodiment of the present invention.
It is a side surface partial sectional view showing.

FIG. 5 is a lead wire arrangement applicable to an embodiment of the present invention.
It is a side surface partial sectional view showing a line processing structure.

FIG. 6 is a lead wire insertion groove 142 formed in the shoulder member 74 .
FIG.

7 is a partial plan view of a plane taken along line BB in FIG.
It

FIG. 8: Applicable to the electric rice cooker according to the embodiment of the present invention
It is a schematic cross-sectional view showing the mounting structure of an effective heat insulation heater.
is there.

[Explanation of symbols]

 71 rice cooker body 86 lid unit 84 inner pot 73 inner container 76 inner unit 77 outer unit 78 vacuum chamber 80 temperature sensor 60 temperature fuse

Claims (4)

[Scope of utility model registration request] 1. A within the inner container for housing the pan, the temperature sensor and cooking heater unit provided on the inner bottom of the inner container
An electric rice cooker including an inner container and an outer container, each of which has a double structure of an inner container and an outer container each having a bottomed container shape without a hole, and an upper edge of the inner container and the outer container. only parts to each other are joined, the inside of the double structure are evacuated, the fixture is provided on the inner bottom surface of the internal unit, vertically mounting fixture
The rice cooking heater unit is attached to the
The rice cooking heater unit has a temperature sensor that can move up and down.
When the inner pot is stored in the inner container , it is attached by the bottom of the inner pot.
The rice heating heater unit is pushed downwards,
Shoulder with end flange attached to the top edge of the inner container
Abutted against the material and closed between the inner container of the inner container and the inner pot
Characterized in that a space is formed ,
Electric rice cooker. 2. The electric rice cooker according to claim 1, wherein a vertical groove for accommodating a lead wire is formed in the inner unit from a bottom surface to an upper edge portion, and the inner rice cooker is connected to a temperature sensor and a rice cooking heater. Lead wire
It is characterized in that it is wired in the vertical groove and guided to the outside of the inner container. 3. The electric rice cooker according to claim 1 or 2, wherein both the inner unit and the outer unit forming the inner container are made of metal. 4. The electric rice cooker according to claim 1, 2 or 3, further comprising a heat retaining function in the inner container.