JPH0523152Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> This invention consists of an inner container provided in the cooking device main body, a mounting arm fixed to the heating cooking device main body, and a content The present invention relates to a heating cooker including a heat-sensitive member for measuring the temperature of an inner container, which is supported while being biased toward the container.

<Prior Art> For example, an electric rice cooker, which is an example of a heating cooker, has an inner container 92 provided within an outer case 91 at a predetermined interval, as shown in FIG. The inner container 92 includes a heater 93 on the inner surface of the bottom, and an inner pot 94 is disposed above the heater 93. A lid unit 9 that closes the inner pot 94 and the inner container 92 is provided on the upper part of the outer case 91.
6 is provided.

In addition, the base of the inner container 92 is provided on the outer surface side of the inner container 92.
A substantially L-shaped support arm 97 is provided which is screwed to the bottom of 2. A heat sensitive element 98 is attached to the tip side of this support arm 97. The heat-sensitive element 98 detects the temperature of the inner container 92, and thereby the temperature can be adjusted during cooking or keeping warm. The support arm 97 is made of an elastic material, and the heat-sensitive element 98
can be brought into contact with the inner container 92 directly or indirectly via the attachment arm 97. Note that 98a is a temperature fuse that cuts off current to the heater 93 and the like when the ambient temperature between the outer case 91 and the inner container 92 becomes abnormally high.

<Problem to be solved by the invention> In the electric rice cooker described above, the heat-sensitive element 98 attached to the tip of the support arm 97 is
If the elastic force is weak, the tip of the heat-sensitive element 98 or the support arm 97 will touch the inner container 92 directly or indirectly.
There is a risk that the product will not come into contact with the surrounding surface of the product reliably.

For this reason, the bending angle α of the support arm 97 is made small in advance to obtain a stronger elastic force so that the reaction force that occurs when the heat-sensitive element 98 or the support arm 97 comes into contact with the inner container 92 becomes stronger. It is configured as follows. When such a support arm 97 is assembled, the distal end side may warp away from the circumferential surface of the inner container 92 due to strong elastic force, as shown by the imaginary line in the drawing. in this case,
A situation may occur in which the temperature fuse 98a portion comes into contact with the inner container 92.

In this way, if the heat-sensitive element 98 separates from the inner container 92, the temperature of the inner container 92 cannot be accurately detected, resulting in poor rice cooking or the temperature being kept out of order. There are drawbacks.
Further, if the temperature fuse 98a side comes into contact with the inner container 92, there is also a drawback that the temperature fuse is cut off early even if the ambient temperature is below a specified value, making it impossible to cook rice.

Furthermore, in order to ensure that the heat-sensitive element 98 comes into contact with the circumferential surface of the inner container 92, its elastic force is adjusted by changing the bending angle of the support arm 97 during assembly. Therefore, there is a problem that assembly requires extra time and effort, and manufacturing costs increase.

Therefore, in view of the above-mentioned problems, the object of this invention is to provide a heating cooker in which a heat-sensitive member for detecting the temperature of the inner container can be brought into reliable contact with the inner container.

<Means for Solving the Problems> The heating cooker of this invention to achieve the above object includes an inner container for accommodating an inner pot containing an object to be heated, and an inner bottom surface of the inner container. , heating means for heating an inner pot housed in the inner container;
comprising a first heat sensitive element and a second heat sensitive element;
A heating cooker that controls the heating means based on the detected temperature of two heat-sensitive elements, the first holding means holding the first heat-sensitive element and bringing the first heat-sensitive element into contact with the side surface of the inner container; a second holding means that is integrally fixed to the first holding means so as to have a predetermined positional relationship with respect to the first holding means, and holds the second heat-sensitive element so as not to contact the side surface of the inner container; , the rear end is fixed near the bottom of the inner container, the tip is made of an elastic body extending to the side of the inner container, and a first
The holding means and the second holding means are swingably connected, and the holding means is characterized by having an attachment arm that elastically presses the first holding means against the inner container using an elastic force.

Further, in the heating cooker of this invention, the first holding means has a bipedal shape having two legs that come into contact with the inner container, and the first heat-sensitive element is attached to the tip of one of the legs. This is a characteristic feature.

Furthermore, in the heating cooker of this invention, the first holding means is a planar body with good thermal conductivity that makes surface contact with the inner container, and a second heat-sensitive element is attached to the planar body, It is characterized in that the inner container and the second heat-sensitive element are in contact with each other via a planar body.

<Operation> According to the above structure, the first holding means and the second holding means are integrally fixed in a predetermined positional relationship, and the first heat-sensitive element is attached to the first holding means and the second holding means is attached to the second holding means. Since the second heat-sensitive element is held in each of the two heat-sensitive elements, the two heat-sensitive elements can be attached to each other in a predetermined positional relationship.

Further, the first holding means and the second holding means are swingably connected to the mounting arm, and are resiliently biased toward the side surface of the inner container by the mounting arm. Therefore, the first
The heat-sensitive element is securely in contact with the side of the inner container,
The temperature of the inner container can be measured accurately.

On the other hand, since the second heat-sensitive element held by the second holding means is held so as not to come into contact with the side surface of the inner container, the second heat-sensitive element can accurately detect the ambient ambient temperature of the inner container. .

In particular, in the configuration of this invention, when holding the first heat-sensitive element and the second heat-sensitive element with different properties, the first holding means and the second holding means, which are fixed to each other and become an integral member, can hold the two heat-sensitive elements. Since the heat-sensitive elements can be held in a predetermined positional relationship, the first heat-sensitive element and the second heat-sensitive element can be easily positioned during assembly. Moreover, since the first heat-sensitive element and the second heat-sensitive element held by the first holding means and the second holding means are elastically urged in the side direction of the inner container by the mounting arm, the inner container is The first heat-sensitive element, which should be brought into contact with the side surface, can be reliably brought into contact with the side surface of the inner container.

<Example> Hereinafter, an example of an electric rice cooker will be described as an example of the heating cooker of this invention.

FIG. 1 is a longitudinal sectional view showing the main parts of the electric rice cooker. In the figure, the electric rice cooker has an outer case 1 constituting the main body of the electric rice cooker, which includes a cylindrical cover member 10 formed of a thin metal plate and a synthetic resin cover member 10 formed on the lower side of the cover member 10. bottom member 1
1 and a synthetic resin shoulder member 12 formed on the upper side of the cover member 10.
Further, a lid unit 5 serving as a lid for closing the upper part of the outer case 1 is rotatably connected to the outer case 1 via a hinge mechanism 7 (see FIG. 3) consisting of a hinge pin 70 and the like. It is detachably attached to the outer case 1 by the hinge mechanism 7. Further, on the open end side of the lid unit 5 opposite to the hinge mechanism 7, there is a lock mechanism (not shown) that engages with a predetermined position of the lid unit 2 to maintain the closed state of the lid unit 2. is provided on the outer case 1 side.

Inside the outer case 1, there is a cylindrical inner container 1.
3, and an inner pot 14 for cooking rice is removably housed in this inner container 13.
Moreover, between the inner container 13 and the cover member 10,
A heat insulating material 15 is provided to prevent heat radiation from the inner pot 14. In addition, a center sensor 16 is provided in a penetrating portion formed in the center of the bottom surface of the inner container 13, and a hot plate 17 is provided between the bottom surface of the inner pot 14 and the inner container 13. Hot plate 17
A rice cooking heater 18 serving as an annular heating means for directly heating the inner pot 14 is embedded in a state surrounding the center sensor 16.

A temperature detection section 2 for detecting the temperature of the inner container 13 is provided at a corner portion of the outer surface of the inner container 13.

Next, the configuration of the temperature detection section 2 will be explained with reference to FIG. 2. The temperature detection section 2 is equipped with a swinging member 22 . The swinging member 22 has a leg portion 22b serving as a first holding means for holding a first heat-sensitive element 23 made of a thermistor or the like, and a leg portion 22b serving as a second holding means for holding a second heat-sensitive element 24 such as a temperature fuse. It has a support part 22c and a rotating part 22a.

As shown in FIG. 1, the leg portion 22b serving as the first holding means has a bipedal shape having two legs that come into contact with the inner container 13, and the first heat-sensitive element 23 is attached to the end portion 22m of one leg. is installed.

The support part 22c, which is the second holding means, is integrally fixed to the leg part 22c so as to have a predetermined positional relationship with respect to the leg part 22b, which is the first holding means. And, the support part 22c which is the second holding means
The temperature fuse 24, which is the second heat-sensitive element, is
As shown in FIG. 1, it is held so as not to come into contact with the side surface of the inner container 13.

In this way, two heat sensitive elements 23 and 24
However, the first holding means 22b and the second holding means 22
The fact that it is attached in a predetermined positional relationship by the integrally formed swinging member 22 consisting of c.
This is one of the features of this embodiment.

A rotating part 22a is further fixed to the swinging member 22, and the rotating part 22a is attached to the mounting arm 21.
is rotatably connected to the tip of the pin 27 by a pin 27.

The mounting arm 21 is formed into a substantially L-shape when viewed from the side, and its base end portion is fixed to the bottom surface of the inner container 13 by a mounting bolt 26 that passes through a through hole provided near the base end. ing. Then, the inner container 13 is attached to the distal end side of this mounting arm 21 from both side edges.
A pair of shaft supports 2 extending parallel to the circumferential side of the
1a is formed. The swinging member 22 is swingably supported on this shaft support 21a via a pin 27.

The mounting arm 21 is made of an elastic spring member such as a stainless steel plate, and is attached to the inner container 13.
Both end portions 22m and 22n of the leg portion 22b are provided so as to be pressable on the peripheral surface of the inner container 13 while attached to the inner container 13. Therefore, in the state where the mounting arm 21 is attached, when the distal end side of the mounting arm 21 presses the inner container 13, the leg portion 22b can be resiliently biased toward the inner container 13 by the reaction force. Both ends 22m and 22n can be brought into contact with the inner container 13 reliably. Note that a conduction lever 21b is provided at the lower end of the mounting arm 21, which is used when conducting a continuity test of the heat-sensitive element 23 and temperature fuse 24.

The heat-sensitive element 23 is connected to a control unit (not shown) that controls energization of the rice cooking heater 18 and the heat-retaining heater 19 provided on the side surface of the inner container 13, and the heat-sensitive element 23 detects the temperature of the inner container 13. Based on the temperature, the control unit adjusts the heating time during cooking and the temperature during keeping warm.

The lid unit 5 is formed into a hollow structure by an outer cover 50 made of synthetic resin provided on the outer surface side and an inner cover 51 made of synthetic resin provided on the inner surface side. The cover 51 is joined with good airtightness by high frequency welding or the like.

Furthermore, an inner lid 55 that closes the upper part of the inner pot 14 is provided below the lid unit 5. This inner lid 55 is detachably attached to the lid unit 5 via a one-touch pin 56 attached to the center portion of the lid unit 5. Note that the space between the lid unit 5 and the inner lid 55 is sealed by a gasket 51b attached to the recess 51a of the inner cover 51, so that steam during cooking does not leak outside from a pressure regulator (not shown). This prevents leakage.

As shown in FIG. 3, this lid unit 5 has a fitting recess 5 on the rear end side facing the rear hinge mechanism 7.
2, and a plate-shaped and hollow fitting member 73 provided on the upper part of the hinge mechanism 7,
It is removably fitted into this fitting recess 52 . The fitting member 73 is rotatably supported by the hinge pin, and is biased in the opening direction of the lid unit 5 by a torsion spring inserted through the hinge pin. Therefore, when the lock mechanism is unlocked, the lid unit 5 can be automatically opened by the spring force of the torsion spring.

Note that the space between the inner container 13 and the inner pot 14 is
As shown in FIG. 4, when the inner pot 14 is attached,
It is configured to be in a closed state. That is, a sealing member 6 provided on the upper shoulder member 12 of the outer case 1 is formed so as to be able to come into contact with the outer wall surface of the inner pot 14, and the sealing member 6 closes the above-mentioned space and allows outside air to escape. It is now prohibited to distribute it. This eliminates heat dissipation upward from the outer surface of the inner pot 14, improving thermal efficiency, and also prevents the temperature difference between the inner pot 14 and the inner container 13 from becoming large, so that the heat-sensitive element 23 13, the temperature of the inner pot 14 can be accurately measured. Furthermore, since the steam from the inner pot 14 will not enter the space, the inner pot 1
The rice cooking heater 18 and the like provided at the bottom of the rice cooker 3 are not exposed to steam and can be used safely.

In addition, 12a is a shoulder heater, which can heat the inner lid 55 of the lid unit 5 and heat the inside of the inner pot 14 from the upper part thereof.

As for the sealing member 6, as shown in FIG. 4, in addition to the lip-shaped structure in which the portion that contacts the inner pot 14 has a large amount of deformation, a block-shaped sealing member 60 shown in FIG. 5 is provided. It is also possible to adopt a configuration in which the sealing member 60 contacts the outer surface of the inner pot 14.

According to the electric rice cooker of the above embodiment, the inner container 13
The temperature sensing unit 2 attached to the holder is provided with a double-legged swinging member 22 swingably attached to the distal end side of a mounting arm 21 formed of a spring member so that both ends 22m and 22n of the swinging member 22 are along the inner container. , since the heat-sensitive element 23 is attached to one end 22m, the mounting arm 2
1 is fixed to the bottom of the inner container 13, the swinging member 22 swings by the spring force of the mounting arm 22, and both ends 22m and 22n of the legs 22b can be arranged along the inner container 13. .

Therefore, since the end 22m of the swinging member 22 reliably contacts the inner container 13, the temperature of the inner container 13 can be conducted from the end 22m of the leg 22b to the heat-sensitive member 23, and the temperature of the inner container Temperature can be measured reliably.

Further, since the space between the inner pot 14 and the inner container 13 is closed as described above, the temperature of the inner pot 13 is almost the same as the temperature of the inner pot 14, and the temperature of the inner pot 14 is It can be detected more accurately.

Furthermore, in this embodiment, the temperature fuse 24 is provided at the end of the support portion 22c, so the temperature fuse 24 can be attached away from the side surface of the inner container 13 by simply attaching the mounting arm 21 to the inner container 13. Therefore, the temperature of the inner container 13 is not directly transmitted to the temperature fuse 24, and the inner container 1
3 and the outer case 1 can be reliably detected.

FIG. 6 is a perspective view of a main part showing a temperature detection unit included in an electric rice cooker as another embodiment of this invention, and has almost the same configuration as the temperature detection unit 2 of the above embodiment. The difference is that the pin 27 that swingably connects the mounting arm 21 and the swinging member 22 is omitted.

That is, in the temperature detection unit 30 of this embodiment, the rotating parts 31a for mounting the swinging member 31 are provided in parallel to each other and protrude from both side edges of the center of the swinging member 31 toward the mounting arm 21 side. At the same time, a part of the tip thereof is bent in directions facing each other to form a convex part 31b, and this convex part 31b is attached to the mounting arm 2.
This configuration is such that it is directly fitted into the through hole of the first shaft support 21a.

Furthermore, the temperature detection section 35 shown in FIG. 7 includes a mounting arm 36 formed of a linear member with strong elastic restoring force in place of the mounting arm 21 of the above-described embodiment. Then, the two upper ends 36a of the mounting arm 36 are inserted into the rotating portion 22a of the swinging member 22 shown in the first embodiment, so that the mounting arm 36 can freely swing the swinging member 22. It is pivoted on.

In the temperature detection units 30 and 35 of both of the above embodiments, both ends of the swinging members 22 and 31 can be brought into contact with the inner container 13 by the elastic force of the mounting arms 21 and 36. Temperature sensitive element 2
3, it can be reliably detected.

In each of the above-described embodiments, the end portion of the leg portion 22m is formed into a cylindrical shape, and the heat-sensitive element 23 is attached to the inside thereof. The heat-sensitive element 23 can also be brought into direct contact with the inner container 13. In this case as well, the other leg 22n can be placed along the inner container 13, and at the same time, the heat-sensitive element 23 can be placed directly along the inner container 13.

Furthermore, although an example has been shown in which the legs 22m and 22n of the swinging member 22 are arranged in the vertical direction, both the legs can also be arranged in the horizontal direction. Even in this case,
The swinging member swings, and both legs can be placed along the inner container 13.

As yet another embodiment, the temperature detection section 40 shown in FIG. 8 is formed of an abutment plate 41 as a swinging member that supports the heat-sensitive element 23. As shown in FIG. That is, a rotating portion 41a as a component of the contact plate 41 is pivotally supported at the upper end of the mounting arm 36 of the linear member as shown in the above embodiment, and this rotating portion 41a A substantially flat first support portion 41b on which the temperature fuse 24 is disposed is provided, and the first support portion 41b is provided substantially parallel to the first support portion 41b, and
A flat second support portion 41c is provided at intervals,
This second support part 41c is provided so as to be able to come into contact with the inner container 13, and the heat-sensitive element 23 is arranged near the end of the second support part 41c. In this embodiment, the heat-sensitive element 23 is arranged in a direction perpendicular to the direction in which the second support portion 41c contacts the inner container 13.

In the above embodiment, since the second support part 41c can also be swung by the rotating part 41a, when the second support part 41c is pressed against the inner container 13, at least the second support part 41c and the content The inner container 13 is in vertical line contact with the inner container 13, and the temperature of the inner container 13 is reliably conducted to the heat-sensitive element 23 via the second support portion 41c.

The direction in which the heat-sensitive element 23 is arranged is
The direction perpendicular to the tangential direction where 1c contacts the inner container 13 is preferable, but if the second support portion 41c has good thermal conductivity, the temperature of the inner container 13 can be reliably detected without considering the mounting direction. can do.

Furthermore, when the inner container has a flat peripheral surface, the contact plate 41 of this embodiment can bring the contact plate 41 and the inner container into surface contact, and can more reliably maintain the temperature of the inner container. can be conducted.

In each of the above-described embodiments, only one heat-sensitive element 23 is provided, but for example, the leg portion 22
They may be provided at both ends 22m and 22n of b, allowing more accurate temperature detection.

Further, in each of the above embodiments, an example was shown in which the heat-sensitive element 23 was brought into contact with the side surface of the inner container 13, but it may be arranged so as to come into contact with the bottom of the inner container 13.

Furthermore, although each of the embodiments has been described using an example of an electric rice cooker, this invention is not limited to electric rice cookers, but can be applied to heating cookers equipped with an inner container and an inner pot.

<Effects of the invention> As described above, according to this invention, when two heat-sensitive elements for the temperature detection section are incorporated into a heating cooker, the first holding means in which the two heat-sensitive elements are integrally formed. Since the first heat sensitive element and the second heat sensitive element are held by the second holding means, the first heat sensitive element and the second heat sensitive element can be held in a predetermined positional relationship.
The first heat-sensitive element and the second heat-sensitive element can be reliably placed at desired positions.

Further, in the case of incorporating the first heat-sensitive element and the second heat-sensitive element, the first heat-sensitive element and the second heat-sensitive element
Since the heat-sensitive element is attached to the first holding means and the second holding means that are integrally formed, the work of assembling the first heat-sensitive element and the second heat-sensitive element is easy. Therefore, the two heat-sensitive elements can be reliably attached to desired positions.

Therefore, each of the attached heat-sensitive elements can accurately detect the temperature of a predetermined portion, and the heating of the cooking device can be satisfactorily controlled based on the detected temperature.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an electric rice cooker showing an embodiment of this invention, Fig. 2 is a perspective view of the temperature detection section provided in the electric rice cooker, and Fig. 3 is a view of the area near the hinge mechanism that supports the lid unit. , a perspective view showing a state in which the lid unit is removed, FIG. 4 is a sectional view of the vicinity of a sealing member that closes the space between the inner container and the inner pot, and FIG. 5 is a sectional view showing another embodiment of the above-mentioned sealing member. , FIG. 6 is a perspective view of essential parts showing another embodiment of the temperature detection section, FIGS. 7 and 8 are partial sectional views and perspective views showing still another embodiment of the temperature detection section, and FIG. FIG. 2 is a sectional view showing the main parts of a conventional electric rice cooker. 13... Inner container, 23... Heat sensitive element, 21,3
6... Mounting arm, 22, 31... Swinging member, 4
1...Abutting plate.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. An inner container for accommodating an inner pot containing an object to be heated, and a heating device provided on the inner bottom surface of the inner container for heating the inner pot accommodated in the inner container. A heating cooker comprising: a means for heating, a first heat-sensitive element, and a second heat-sensitive element, the heating means being controlled based on the detected temperatures of the two heat-sensitive elements; , a first holding means for bringing the first heat-sensitive element into contact with the side surface of the inner container; a second holding means for holding the heat-sensitive element No. 2 so as not to come into contact with the side surface of the inner container; A heating cooking device comprising: a mounting arm to which the first holding means and the second holding means are swingably connected, and which elastically presses the first holding means against the inner container using an elastic force. . 2 The first holding means has a bipedal shape having two legs that come into contact with the inner container, and a first holding means is attached to the tip of one of the legs.
The cooking device according to claim 1, characterized in that a heat-sensitive element is attached thereto. 3. The first holding means is a planar body with good thermal conductivity that makes surface contact with the inner container, and a second heat-sensitive element is attached to the planar body, and the inner container and the first holding device are connected through the planar body. 2. The heating cooker according to claim 1, wherein the heating element is in contact with the second heat-sensitive element.