JPH04208111A - Cooking apparatus with heater - Google Patents

Abstract

PURPOSE:To measure accurate temp. of an inner deep pan using a center sensor and eliminate its risk of breakage by inserting it into the cylindrically formed body of an insulator secured to the bottom center of an inner vessel. CONSTITUTION:A center sensor T is inserted in the cylindrically formed body G1 of an insulator G secured to the top surface of a swellout part 22a in the center of the bottom 22 of an inner vessel 2, and therefore is free from influence of heat radiation from a main heater H and influence of the air in the gap S1 heated by this heater H. Because the center sensor T is protected also mechanically by the body G1 of an insulator G, there is no risk of breaking the center sensor T when the inner deep pan U is to be set or removed. The body G1 of insulator G is fitted in a through hole 22b formed in the top surface of the swellout part 22a, while flange part G2 of the insulator in interposed between the top surface of the swellout part 22a and the top surface of another swellout part 32a formed at the bottom 32 of a heat shield vessel 3, and thus the insulator G is secured to the bottom center of the inner vessel 2.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a heating cooker such as a rice cooker or a rice cooker, and more specifically, by heating the air around an inner pot with a main heater, This invention relates to an indirect heating 1 cooker that indirectly heats an inner pot.

<Prior art> In rice cookers and the like used as heating cookers, rice cookers are mainly used for home use, and rice is cooked by placing an inner pot containing rice and water on a heating plate in which a main heater is embedded. A direct heating method is used.

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

Therefore, in a commercial rice cooker, etc., as shown in FIG. 7, in order to uniformly heat the inner pot X1, the sides X1. A gap X3 is provided between the bottom part X1b and the inner container X2 that accommodates the inner pot X1, and the main heater X4, which is configured by spirally winding the heater wire X4a, is attached to the bottom of the inner pot X1. The main heater X4 is placed in the gap X3 with an interval so as not to come into contact with the inner pot Xlb, and the main heater X4 heats the air in the gap X3 to indirectly heat the inner pot X1. It is being said.

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.

Further, 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 X1 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, since the center sensor X7 is exposed in the gap X3 between the inner pot X and the inner container X2, the sensor There is a problem in that the center sensor X7 cannot accurately measure the temperature of the inner pot X due to the influence of the radiant heat and the air in the gap X3 heated by the main heater X4. Furthermore, when the inner pot X1 is attached to and removed from the inner container X2, there is a risk that the bottom of the inner pot X1 will collide with the center sensor X7, causing damage to the center sensor.

The present invention has been made in view of the above circumstances, and
It is an object of the present invention to provide a heating cooker in which the temperature of an inner pot can be accurately measured using a center sensor, and the center sensor is not likely to be damaged.

Means for Solving the Problems> In order to solve the above problems, the heating cooker of the present invention has a cylindrical shape that is fitted into a through hole at the bottom of the inner container with the center sensor inserted therein. and a flange that protrudes outward from the outer periphery of the side of the main body, is inserted between the bottom of the inner container and the bottom of the heat-insulating container, and maintains a constant distance between the two bottoms. The present invention is characterized in that the insulator is fixed to the center of the bottom of the inner container by fitting the main body into the through hole and inserting the flange between the two bottoms.

Effect> In the heating cooker of the present invention having the above configuration, the center sensor is attached to the insulator fixed to the center of the bottom of the inner container.
Since it is inserted into the cylindrical main body, it is not affected by radiant heat from the main heater or air in the gap heated by the main heater. Further, since the center sensor is mechanically protected by the main body of the insulator, there is no fear that the center sensor will be damaged when attaching or detaching the inner pot. Moreover, the above-mentioned insulator fits the main body into the through hole at the bottom of the inner container, and also connects the flange protruding outward from the outer circumferential surface of the main body to the bottom of the inner container and the bottom of the heat-insulating container. Since it is fixed at the center of the bottom of the inner container by inserting it between Another advantage is that it is easy to assemble. Furthermore, the flange also has the role of keeping the distance between the two bottoms constant, so if the distance between the two bottoms becomes too small, heat insulation becomes insufficient and leakage to the outside of the heat insulation container occurs. Another advantage is that the heating cooker can be prevented from being damaged by heat.

<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 an outer pot that is attached to the main body B so as to be openable and closable. Lid C
1, and an inner lid C2 attached to the inner surface of the outer lid C1 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 removably accommodated, a heat shielding container 3 that accommodates the inner container 1 while maintaining a gap S2 between the side part 21 and the bottom part 22 of the inner container 2; The containers 1 to 3 are arranged concentrically with the mouth edges fixed, and the gaps S
2, and a shoulder member 4 that closes the second part of the gap S3 between the container 1 and the heat shield container 3. An insulator G is fixed to the center of the bottom portion 22 of the inner container 2, and a center sensor T is disposed within a through hole G4 of the cylindrical main body G1 of the insulator-7-G. Further, a main heater H is arranged around the center sensor T on the bottom part 22 of the inner container 2 as described in "1".

The inner pot U is entirely formed by squeezing and pressurizing a metal plate such as an aluminum plate, and its inner surface is coated with Teflon. , a recessed part U2b is formed upward to enclose the upper part of the center sensor T, and a flat part U2a facing the main heater H is formed around this recessed part U2b. In addition, a flange portion U3 extending outward is provided at the 1st edge of the inner pot U, and the inner pot U connects the flange U3 to the 2nd edge of the shoulder member 4. By placing it on the surface, the side part U1 and the bottom part U2,
There is a gap S1 between the side part 21- and the bottom part 22 of the inner container 2.
It is removably housed in the inner container 2 while maintaining the same. The flange portion U3 also includes a 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.
occlude the upper part of the

The outer container 1 includes a cylindrical outer case 11 formed by drawing and pressurizing a metal plate such as a stainless steel plate, and a cylindrical outer case 11 formed by drawing a metal plate (7). and a bottom member 12 that supports it from the side.
2. The outer container 1 includes an outer case 11 as shown in FIG.
The pot part 11 is formed by rolling the edges of the two ends inward.
a is fixed to the shoulder member 4 by fitting into a groove 41 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 into the top of the bulge 22a. 22b is formed. In addition, the bulging portion 22a of the bottom portion 22 in 1.
A main heater H is attached to the surrounding flat portion 22c via an annular heater receiving fitting K.

Further, a heat-retaining heater h is wound around the outer periphery of the side portion 21 of the inner container 2, and a temperature sensor t for measuring the temperature during heat-keeping 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.

-1- At the bottom 32 of the heat shield container 3, there is an inner container 2 in the center.
A frusto-conical bulge 32a is formed along the bulge 22a of the bulge 22a, and a center sensor T (=I) is formed on the top surface of the bulge 32a. Among them, 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 material such as nylon, and has ribs C on the lower surface of the outer lid c1 on two sides.
] d, and an annular convex portion 45 that supports the flange portion U3 of the inner pot U.

Handle portions 44 and 46 are formed at the portions of the shoulder portion I ('4) corresponding to the front and rear surfaces of the rice cooker to serve as a grip when carrying the main body B.

In addition, a locking claw C4a for locking the outer lid c1 to the main body B in the closed state is engaged with the front surface of the handle portion 44 on the front side of the rice cooker. ,
Engaged portion 44. A is formed, and a main body side part D1 of a hinge part for rotatably supporting the outer cover C1 on the main body B is fixed to the second part of the handle part 46 on the rear side. There is.

- ] θ - 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 protruding outward from the side outer periphery of the main body G1. .

As described above, the insulator G has a main body G1 and an inner container 2.
The flange G2 is fitted into the through hole 22b formed on the top surface of the bulge 22a of the bottom 22 of the bulge 22a.
By inserting the bulge 22H between the top surface of the bulge 2a and the top surface of the bulge 32a provided on the bottom 32 of the heat shield container 3, the bulge 22H at the center of the bottom 22 of the inner container 2 can be fixed on the top.

In addition, by inserting the flange G2, the bottom 2 of the inner container 2
2 and the bottom 32 of the heat shielding container 3 is kept constant.

The main heater H maintains the distance between the flat part 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,
A groove 1 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 T so as to be movable up and down, and includes a temperature-sensitive magnetic material T2 and a temperature-sensitive magnetic material T2 inside. It includes a permanent magnet T3 that attracts the 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 bulged portion 32a.

When the inner pot U is not housed in the inner container 2, the center sensor T protrudes upward due to the biasing force of the coil spring T1, and when the inner pot U is housed in the inner container 2, the center sensor T projects as shown in FIG. It will be pushed down to the position shown. In this state, when the operating part L2 of the switch lever L disposed in the switch box SB on the front side of the outer container 1 is pushed down from the state shown by the broken line to the state shown by the solid line in the same figure, the tip of the switch lever L is pressed down. part L] is pushed up, and the temperature-sensitive magnetic body T2 and the permanent magnet T3 are attracted to each other. Then, the normally closed contact of the 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 rises 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 T2.
As a result, the switch lever L returns from the state shown by the solid line to the state shown by the broken line. and,
The normally closed contact of the limit switch LS is turned off, and power to the main heater H is cut off.

Note that, as shown in FIG. 2, the switch box SB is provided with various switches sw, 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 inner panels C1, c made of metal, and the rib C1d is formed on the lower surface of the inner cover C1b. There is. Further, on the outside of the rib C1d, an annular gasket C7 is provided on the outside of the rib C1d to be pressed against the upper outer circumference U4 of the flange U3 of the inner pot U to seal the inner pot U when the outer lid C1 is closed. is installed.

A handle C5 for opening and closing the outer cover C1 is provided in a portion of the outer cover C1''a above the handle 44, and the lock claw C4a is provided on the front surface of the handle C5. A lock lever C4 is rotatably attached.Furthermore, a lid-side portion D2 of the hinge portion is fixed to a portion of the outer cover C1a above the handle portion 46.

A one-touch pin P for removably 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 above the upper surface of the outer cover C1, a 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. , Inner lid stopper l to seal the inner pot U
C2a is taken as an example.

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

The cover D2b is formed in such a size that it covers the entire fixing part D2a and becomes invisible from the outside, and is integrally formed with a bolt receiving part D2c into which a hinge bolt can be removed at one end. Then, the above-mentioned bolt receiving part D2c is applied from below to the shelf part D2e protruding from the fixing part D2a, and the engaging protrusion D2d protruding from the lower surface of the cover D2c is connected to a part of the engaging part 11 of the fixing part D2a. By engaging with D2f, the cover D2b is attached to the fixing part D2a.

In this state, the fixed part D2a and the cover
Since the gap with D2b is not exposed on the top surface, it has a good appearance and also prevents water etc. from entering the interior through the gap.
-I can.

In the rice cooker of this embodiment, which consists of the above-mentioned parts, the center sensor 'r is a cylindrical body of an insulator G fixed to the top surface of the bulging part 22a, which is the center of the bottom part 22 of the inner container 2. Since it is inserted in G1, the radiant heat from main heater H and 1. 1. It is not affected by the air in the gap S1 heated by the main heater H.

Moreover, since the center sensor T is mechanically protected by the main body G1 of the -1-recording insulator G, there is no fear that the center sensor T will be damaged when the inner pot U is attached or detached.

Moreover, the above? i! ! -7''-6 fits the main body G] into the through hole 22b formed on the top surface of the bulging portion 22a, and connects the flange G2 to the top surface of the bulging portion 22a and the heat shielding container. The inner container 2 is fixed at the center of the bottom of the inner container 2 by being inserted between the inner container 2 and the top surface of the bulge 32a formed on the bottom 32 of the inner container 2, so parts such as screws are not required for fixing the insulator. Although the number of separate parts of the insulator G increases, it also has the advantage of being easy to assemble.

Furthermore, the flange G2 also has the function of keeping the distance between the two bottom portions 22 and 32 constant, so if the distance between the two becomes too small, the heat insulation will be insufficient. Another advantage is that equipment placed around the heat shielding container 3 can be prevented from being damaged due to heat leaking to the bottom part of the heat shielding container 3.

In addition, in the embodiment, the mouth edges of the outer container], the inner container 2, and the heat-insulating container 3 are all arranged concentrically by being fixed to a predetermined portion of the shoulder member 4. For example, as shown in Figure 7, heat shield container
．． Compared to the case where X8 is attached to inner container X2,
There is also the advantage that each of the containers 1 to 3 can be assembled more easily and accurately.

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,
Center sensor or 611 fixed at the bottom center of the inner container
The center sensor is inserted into the cylindrical body and is thermally and mechanically protected, allowing the center sensor to accurately measure the temperature of the inner pot. There is no risk of damage. I tend to
The above-mentioned insulator can be installed at the center of the bottom of the inner container by fitting the main body into the through hole at the bottom of the inner container and inserting the flange between the bottom of the inner container and the bottom of the heat-insulating container. Since it is fixed, assembly is easy. Furthermore, since the flange part also has a role of keeping the distance between the two bottom parts constant, if the distance between the two bottom parts becomes too small, the heat insulation will be insufficient, and the outside of the heat insulation container will leak. It is also possible to prevent the heating cooker from being damaged due to leaked heat (11-1).

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a rice cooker as an embodiment of the heating cooker of the present invention, FIG. 2 is a half-cut front view of the rice cooker,
Fig. 3 is a partially cutaway perspective view enlarging the attachment portion between the shoulder member and the inner container of the rice cooker, Fig. 4 is an enlarged sectional view of the inner pot and main heater of the rice cooker, and Fig. 5 FIG. 6 is an enlarged cross-sectional view of the outer lid side of the hinge portion of the rice cooker, and FIG. 7 is a cross-sectional view showing an example of a conventional rice cooker. 2...Inner container, 21...Side part, 22...Bottom part, 2
2b...through hole, 3...heat shielding container, G...insulator,
G1...Body, G2...Flame, H...Main heater, SL, S2...Gap, T...Center sensor, U
...Inner pot, Ul...side, U2...bottom. Patent applicant Tiger Thermos Co., Ltd. Agent Patent attorney Hiroshi Kamei (and 2 others) Shusho (4) Shushu ≦: l + - 4ji. , + (g)) (g) he he
L) L) ward t I, hei, l ya ri hero masao he proof Tochi Shutian (t) 鐸仝(gijiang HV) H: : : '. ENG -hp -to--1 (Yuji ” (self-ki) H 9 formula; % formula% 1)--to

Claims (1)

[Claims] 1. Maintaining a gap between the inner pot and the side and bottom of the inner pot and the inner container that removably houses the inner pot while maintaining a gap between the inner pot and the side and bottom of the inner pot. a heat-insulating container that houses the inner container; a center sensor that is inserted through a through hole provided at the center of the bottom of the inner container and comes into contact with the bottom of the inner pot accommodated in the inner container from below; In a heating cooker equipped with a main heater disposed at the bottom of the inner container with a space between A cylindrical main body that projects outward from the outer periphery of the side of the main body, and is inserted between the bottom of the inner container and the bottom of the heat-insulating container to maintain a constant distance between the two bottoms. The insulator is fixed to the center of the bottom of the inner container by fitting the main body into the through hole and inserting the flange between the two bottom parts. Heating cooker.