JPH04208112A - Cooking apparatus with heater - Google Patents

Abstract

PURPOSE:To keep constant the distance between a heater wire and the bottom of an inner deep pan by forming a flat part confronting a main heater around a recess provided in the bottom center of an inner deep pan, and forming the main heater through winding an element wire spirally in the same plane in such an arrangement as confronting the flat part with a certain spacing reserved in between. CONSTITUTION:A flat part U2a confronting a main heater H is formed around a recess U2b of an inner deep pan U. This flat part U2a is located at the bottom U2 of the pan U, and the main heater H is formed through winding of element wire H1 spirally in the same plane in such an arrangement as confronting the flat part U2a with a certain spacing interposed, and is arranged in parallel with the flat part U2a on the plane 22c of the bottom 22 of inner vessel 2 while supported by a ring-shaped heater receptacle K. Therefore, the distance between the flat part U2a and the element wire H1 constituting the main heater H can be held constant without designing the main heater H in a stereophonic form which is difficult to manufacture and handle.

Description

[Detailed Description of the Invention] <Industry> Second Field of Application The present invention relates to a rice cooker and a rice cooker, and more specifically, to a rice cooker that heats the air around an inner pot using a main heater. This invention relates to an indirect cooking device that indirectly heats an inner pot.

<Conventional technology> In rice cookers, etc., which are used as heating cookers,
For household use, a direct heating method is used in which rice is cooked by placing an inner pot containing rice and water on a heating plate in which the main heater is embedded.

However, in the direct heating type mentioned above, the heating is uneven, so if the direct heating type is used in a large rice cooker for commercial use, for example, there is a problem that burns are likely to occur.

Therefore, in a commercial rice cooker, etc., in order to uniformly heat the inner pot X1, as shown in FIG. While providing a gap X3 between the inner container X2,
The main heater X4, which is configured by winding the heater wire X4a in a spiral shape, is placed so that it does not come into contact with the bottom Xlb of the inner pot X1.
So-called indirect heating is performed in which the inner pot X1 is indirectly heated by disposing the main heater X4 in the gap X3 with an interval and heating the air in the gap X3 with the main heater X4.

In the indirect heating type rice cooker, the amount of heat of the main heater X4 is larger than that of the direct heating type rice cooker. A heat shielding container X6 is disposed that forms a gap X5 between the side portion X2a and the bottom portion X2b.

Furthermore, a center sensor X7 is attached to the center of the bottom of the heat-insulating container X6, which contacts the bottom Xlb of the inner pot X from below to measure the temperature of the inner pot X1.

<Problems to be Solved by the Invention> However, in the above configuration, as shown in the figure, the inner pot Since it is formed in a concave shape, the distance between the heater wire X4a constituting the main heater X4 and the bottom part X1b of the inner pot X1 varies depending on the location, and there is a problem that heating cannot be performed uniformly. .

Therefore, as shown in FIG. 8, in order to maintain a constant distance α between the bottom part Xlb of the inner pot X and the heater wire X4a constituting the main heater X4, the heater wire X4a is
The idea was to wind it in a three-dimensional shape along the bottom part X], b.

However, the main heater X4 having the three-dimensional shape has the problem that it is difficult to manufacture, and is also bulky, making it cumbersome to store and transport when manufacturing a rice cooker or the like. Moreover, in order to attach the three-dimensional main heater X4 to the bottom of the inner container X2 along the bottom X]b of the inner pot X1, there is also the problem that metal fittings are required for mounting the complicated shape. be.

In addition, in the rice cooker shown in FIGS. 7 and 8, as described above, the bottom of the inner pot X1 has a shape that is gently recessed upward, so that the center sensor X7
However, it will be largely exposed in the gap X3 between the inner pot X1 and the inner container X2, and due to the influence of radiant heat from the main heater X4, it will be impossible to accurately measure the temperature of the inner pot X1 with the center sensor X7. There are also problems.

The present invention has been made in view of the above circumstances, and
Without making the main heater three-dimensional, the distance between the heater wires that make up the main heater and the bottom of the inner pot can be kept constant, and the influence of heat exerted by the main heater on the center sensor The purpose is to provide a heating cooker that can reduce the

A heating cooker of the present invention for solving the problems described in 1.
A recessed portion recessed upward is formed in the center of the bottom of the inner pot that is in contact with the center sensor, and a flat portion facing the main heater is formed around this recessed portion,
The main heater is characterized in that it is formed by winding a heater wire in a spiral shape within the same plane so as to face the plane part at a constant interval.

<Function> In the heating cooker of the present invention having the above configuration, a flat part facing the main heater is formed at the bottom of the inner pot, and the main heater is arranged at a constant interval from the flat part. Since the heater wires are spirally wound in the same plane so as to face each other, the heater wires constituting the main heater and the bottom of the inner pot do not need to be shaped into a three-dimensional shape. can maintain a constant distance. Also,
A recessed part recessed upward is formed in the center of the bottom of the inner pot, which the center sensor comes into contact with, and the upper part of the center sensor is wrapped in this recessed part. The center sensor is more influenced by heat from the bottom, and the influence of heat exerted by the main heater on the center sensor can be relatively reduced.

<Example> The heating cooker of the present invention will be described below with reference to the drawings showing a rice cooker as an example.

As shown in FIGS. 1 and 2, the rice cooker of this embodiment includes an inner pot U, a main body B that removably houses the inner pot U, and a main body B that can be opened and closed. The inner lid C2 is provided with an inner surface of the outer lid C1 by a distance of τ1 in order to close the inner pot U.

The main body B maintains a gap S1 between the outer container 1 that constitutes the outer shape of the rice cooker and the side U1 and bottom U2 of the inner pot U provided in the outer container 1, while maintaining the inner pot U. An inner container 2 that is detachably accommodated, a heat shield container 3 that accommodates the inner container 1 while maintaining a gap S2 between the side portion 21 and the bottom portion 22 of the inner container 2, and the openings of each of the containers 1 to 3. Fix the edges and
The containers 1 to 3 are arranged concentrically, and the gaps S2
, and a shoulder member 4 that closes the upper part of the gap S3 between the outer container 1 and the heat shield container 3. And the inner container 2
An insulator G is fixed to the center of the bottom 22 of the insulator G, and a center sensor T is disposed within the through hole G4 of the cylindrical main body G1 of the 69 insulator G. Further, a main heater H is arranged around the center sensor T on the bottom part 22 of the inner container 2.

The inner pot U is entirely formed by drawing a metal plate such as an aluminum plate, and its inner surface is treated with Teflon. In order to enclose the upper part of the center sensor T, the recessed part U2b is recessed in three directions, and
A plane portion U2a facing the main heater H is formed around this recessed portion U2b. Further, the rim of the inner pot U is provided with a flange U3 extending outward, and the inner pot U has the flange U3 mounted on the upper surface of the shoulder member 4. By placing the side part U1 and the bottom part U2, the inner container 2
The inner container 2 is removably housed in the inner container 2 while maintaining a gap S1 between the side portion 21 and the bottom portion 22 of the inner container 2 . Further, the flange portion U3 closes the upper part of the gap S1 formed between the inner pot U and the inner container 2 when the inner pot U is accommodated in the inner container 2.

The outer container 1 consists of a cylindrical outer case 1 formed by drawing a metal plate such as a stainless steel plate, and an outer case 11 described in -1, which is also formed by drawing a metal plate. It is provided with a bottom part t that supports from the side; t1-2. 1. As shown in FIG. 2, the distribution container 1 is a pot formed by rolling the rim of one end of the outer case 11 inward. a is fixed to the shoulder member 4 by fitting into a groove 4 formed on the outer peripheral surface of the shoulder member 4.

The inner container 2 is formed by drawing a metal plate such as an aluminum plate, and as shown in FIG. It is fixed to the shoulder member 4 by engaging with bayonet receivers 43 formed at multiple locations on the inner peripheral surface of the shoulder member 4.

A frustoconical bulge 22a is formed at the center of the bottom 22 of the inner container 2, and a through hole into which the main body G1 of the insulator G is fitted is formed on the top surface of the bulge 22a. 22b is formed. Further, in the bottom portion 22, a main heater H or an annular heater receiving fitting K is attached to a flat portion 22e around the bulging portion 22a.

Further, on the side 21 of the inner container 2, the outside = 9
- A heat-retaining heater h is wound around the circumference, and a temperature sensor t for measuring the temperature during heat-retention and a temperature fuse f are attached.

The heat shielding container 3 is formed by drawing a metal plate such as an iron plate, and as shown in FIG. It is fixed to the shoulder member 4 by being fixed to the lower surface of the shoulder member 4 with a screw N1.

A truncated cone-shaped bulge 32a is formed at the center of the bottom 32 of the heat shielding container 3, and extends along the bulge 22a of the inner container 2. The sensor T is removed (=1 is removed. Also, of the bottom part 32,
An annular heat shield plate W is fixed to the lower surface of the flat part 32c around the bulging part 32a.

The shoulder member 4 is formed into an annular shape from a heat-resistant synthetic resin H material such as nylon, and has a rib C1 on the lower surface of the outer lid C1 on the upper surface.
d, and an annular convex portion 45 that supports the flange portion U3 of the inner pot U.

-]O- Handle portions 44 and 46, which serve as a handhold when carrying the main body B, are formed in portions of the shoulder portion 144 corresponding to the front and rear surfaces of the rice cooker.

Furthermore, a lock claw C4a for locking the outer lid C1 to the main body B in a closed state is engaged with the front surface of the handle portion 44 on the front side of the rice cooker among the two handle portions 44 and 46.
An engaged portion 44a is formed, and a handle portion 46 on the rear side
A body-side portion D1 of a hinge portion for rotatably supporting the outer cover C1 on the body B is fixed above the body.

The insulator G includes a cylindrical main body G1 having a through hole G3 into which the center sensor T is inserted, and a flange G2 projecting outward from the outer periphery of the side of the main body G1.

As described above, the insulator G fits the main body G1 into the through hole 22)) formed on the top surface of the bulging part 22a of the bottom part 22 of the inner container 2, and the flange part G2. ,” by inserting it between the top surface of the second bulging portion 22 a and the top surface of the bulging portion 32 a provided on the bottom portion 32 of the heat shielding container 3 , at the center of the bottom portion 22 of the inner container 2 . The bulge 22a is fixed to the top surface of the bulge 22a.

In addition, by inserting the flange G2 in item 1, the distance between the bottom 22 of the inner container 2 and the bottom 32 of the heat-insulating container 3 is kept constant.

The main heating heater H maintains a distance α between the plane portion U2a of the inner pot U and the heater wire H1 by a certain distance α, as shown in FIG.
The heater wire H1 is spirally wound in the same plane in order to maintain the temperature of the heater wire H1, and as shown in FIG. has been done. The heater holder has a spiral groove 1 on the top surface in which the main heater H is accommodated,
The groove K in which the main heater H is accommodated is covered by an annular heater cover 2.

The center sensor T is attached to the top surface of the bulging portion 32a of the heat shielding container 3 via a coil spring T1 so as to be freely movable downward, and includes a temperature-sensitive magnetic material T2 and a temperature-sensitive magnetic material T2 therein. It includes a permanent magnet T3 that attracts the magnetic body T2. The permanent magnet T3 is disposed within the center sensor T so as to be movable up and down, and is connected to the tip L1 of the switch lever L facing the lower surface of the bulge 32a.

When the inner pot U is not housed in the inner container 2, the center sensor T protrudes upward by the biasing force of the coil spring T1 (7; when the inner pot U is accommodated in the inner container 2, the first It is pushed down to the position shown in the figure.In this state, the outer container 1
When the operating part L2 of the switch lever L disposed in the switch box SB on the front side of
The tip L] of the magnet is pushed away, and the temperature-sensitive magnetic body T2 and the permanent magnet T3 become attracted to each other. Then, the normally closed contact of the limit switch LS provided below the switch lever L is turned on, the main heater H is energized, and rice is cooked.

When the temperature of the inner pot U increases by 1 and reaches a predetermined temperature, the temperature-sensitive magnetic body T2 loses its magnetism, and the permanent magnet T3 changes to the temperature-sensitive magnetic body T.
It falls away from 2, and along with it, the switch lever ■
7, the state shown by the solid line returns to the state shown by the broken line. Then, the normally closed contact of the limit switch L S-13= is turned off, and the power supply to the main heater H is cut off.

In addition, as shown in FIG. 2, the switch box SB is provided with various switches sw and sw in addition to the operating portion L2 of the switch lever L.

The outer cover C1 consists of an outer cover C1a made of metal, an annular inner cover C1b made of synthetic resin, and an inner panel C1c made of metal, and the rib C1-d is formed on the lower surface of the inner cover 01b. There is. In addition, on the outside of the rib C1d,
When the outer lid C1 is closed, an annular gasket C7 is attached which is pressed against the outer circumference U4 at the second end of the flange U3 of the inner pot U to seal the inner pot U.

A portion of the outer cover C1a above the handle portion 44 includes:
A handle C5 is provided for opening and closing the outer lid C1, and a lock lever 04 having the lock claw C4a is rotatably attached to the front surface of the handle C5.

Further, a lid-side portion D2 of the hinge portion of the hinge 14 is fixed to a portion of the outer cover C1a above the handle portion 46.

A one-touch pin P for detachably attaching the inner cover C2 is protruded from the center of the lower surface of the inner panel C1c. Furthermore, a cylindrical pressure regulating part C6 whose upper end protrudes from the upper surface of the outer cover C1a is attached to the upper surface of the inner panel C1c.

The inner cover C2 is formed by drawing a metal plate such as an aluminum plate, and engages with the one-touch pin P in the center thereof to removably attach the inner cover C2 to the outer cover C1. , the inner lid retaining rubber C2a for sealing the inner pot U has been removed (=j).

In the illustrated embodiment, the lid-side portion D2 of the hinge portion is connected to the screw N2, as shown in FIGS. 5 and 6.
Fixed part D2a fixed to inner cover〇lb by N2
and a cover D2b that covers the fixed portion D2a.

The cover D2b is formed in a size that can cover the entire fixed part D2a and make it invisible from the outside, and is integrally formed at one end with a bolt receiving part D2c into which a hinge bolt can be removed. Then, apply the bolt receiving part D2c from below to the shelf part D2e protruding from the fixing part D2a, and apply the engaging protrusion D2d protruding from the lower surface of the cover D2c to the locking part D2f of the fixing part D2a. By engaging, the cover D2b is attached to the fixing part D2a.

In this installed state, the fixed part D2a and the cover D2b
The appearance is good because it is not exposed on the top surface or in the gap between the
It is also possible to prevent water and the like from entering the interior through the gaps.

In the rice cooker of this embodiment, which is composed of the above-mentioned parts, a flat part U2a facing the main heater H is formed on the bottom part U2 of the inner pot U, and the main heater H
Alternatively, the heater wire H1 is spirally wound in the same plane so as to face the flat part U2a at a constant interval, and is supported by an annular heater receiving bracket K, and is connected to the bottom part 22 of the inner container 2. It is arranged on the plane part 22c in parallel with the plane part U2a. Therefore, the distance between the heater wire H1 that constitutes the main heater H and the flat part U2a can be maintained at a constant distance α without making the main heater H into a three-dimensional shape that is complicated to manufacture and handle. I can do it.

In addition, a recessed part U2b recessed in three directions is formed in the center of the bottom part U2 of the inner pot U that the center sensor T comes into contact with.
Since it is surrounded by b, the center sensor T is
The main heater H is relatively influenced by the heat from the bottom U2 of the inner pot, and the center sensor T is not affected by the heat.

Furthermore, in the second embodiment, only the central concave portion U2b of the bottom portion U2 of the inner pot U is recessed upward, and the bottom portion 22 of the inner container 2 corresponds to the concave portion U2b. Since the bulging portion 22a of the inner pot U is disposed, the bottom portion Xlb of the inner pot It is possible to bring the bulge 22a of the bottom 22 of the inner container 2 close to each other. Therefore, in the above embodiment, the center sensor T is connected to the insulator G fixed to the top surface of the bulged portion 22a.
Coupled with the fact that it is inserted into the cylindrical main body G1, there is an advantage that the influence of heat from the main heater H can be eliminated even more efficiently.

Note that the configuration of the present invention can be applied to cooking devices other than the rice cooker described in the embodiments, such as an electric pot and a rice cooker that does not have a heat retention function.

In addition, various design changes can be made without changing the gist of the present invention.

<Effects of the Invention> The heating cooker of the present invention is configured as described above,
A flat part facing the main heater is formed at the bottom of the inner pot, and the heater wires are spirally arranged in the same plane so that the main heater faces the flat part at a constant interval. Because it is formed by winding, it is possible to maintain a constant distance between the heater wire that constitutes the main heater and the bottom of the inner pot without making the main heater into a three-dimensional shape that is complicated to manufacture and handle. can. Moreover, a recessed part recessed upward is formed in the center of the bottom of the inner pot that the center sensor comes into contact with, and the second part of the center sensor is surrounded by this recessed part, so that the center sensor can It will be more affected by the heat from the bottom of the inner pot. For this reason,
The influence of heat that does not reach the center sensor from the main heater can be relatively reduced, and the center sensor can more accurately measure the temperature of the inner pot.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a rice cooker at °C as an embodiment of the heating cooker of the present invention, Fig. 2 is a half-cut front view of the rice cooker described in item 1, and Fig. 3 is a shoulder member and contents of the rice cooker. Fig. 4 is an enlarged cross-sectional view of the inner pot and main heater of the rice cooker, and Figs. 5 and 6 are the hinges of the rice cooker. Fig. 7 is a cross-sectional view showing an example of a conventional rice cooker, and Fig. 8 is a cross-sectional view showing an example of a conventional rice cooker with an inner pot and main heater. FIG. 2 Inner container, 22・Bottom, ■...Main heater, Hl...Heater wire, Sl, S
2... Gap, T... Center sensor, U... Inner pot, Ul
...side part, U2...bottom part, U2a...plane part, U
2b... recessed part. Patent Applicant: Tiger Mad, Jar Co., Ltd. 1st Representative
Person Patent Attorney Hiroshi Kamei Katsu (2 idiots) = 20 = to Trigram 1 8::::'s::::::: Hehe work ← −(he)p←ki with ρ be 1)← p p Ki to C/)
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Claims (1)

[Claims] 1. An inner container that removably accommodates the inner pot while maintaining a gap between the inner pot and the side and bottom of the inner pot; In a heating cooker equipped with a center sensor that contacts the center of the bottom of the inner pot from below, and a main heater that is arranged at the bottom of the inner container with a space between the center sensor and the bottom of the inner pot, the center sensor A recessed part recessed upward is formed in the center of the bottom of the inner pot that comes into contact with the inner pot, and a flat part facing the main heater is formed around this recessed part, and the main heater A cooking device characterized in that a heater wire is spirally wound in the same plane so as to face a plane part at a constant interval.