JPH0928559A - Rice cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance the assembling property and functional property of a lamp heater and peripheral members thereof, in a rice cooker using the lamp heater for emitting electromagnetic waves as heat source, by uniting and installing the lamp heater, a protecting plate, a reflecting plate, and a heat insulating plate into a rice cooker body in such a manner as to be attachable and detachable. SOLUTION: A rice cooker has an inner pan for housing an inner pot; a heater unit 6 installed to the lower end of the inner pan in such a manner as to be attachable and detachable; and an outer pan for covering the inner pot and the heater unit 6. In the assembling of the heater unit 6, a water basin part 21 is placed on the placing part 30 of a heat insulating plate 13 in such a manner that the cut rib 33 of the placing part 30 is fitted to the first drain hole 21a of the water basin part 21 of a reflecting plate 12. An annularly curved lamp heater 10 for emitting electromagnetic waves is installed onto the reflecting plate 12 by a support member 15, and a circular support part 44 is fitted and fixed to a terminal part 16 through the opened part of the notch 43a of a second support member 17, whereby they are integrally united.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rice cooker using a lamp heater that emits electromagnetic waves as a heat source.

[0002]

2. Description of the Related Art In recent years, as disclosed in Japanese Patent Laid-Open No. 7-39453, a rice cooker has been proposed which improves the rice cooking performance by using a heat source having a fast heating property such as a halogen heater which radiates an electromagnetic wave. Proposed.

This type of rice cooker, as shown in FIG.
A protective plate C made of glass that transmits electromagnetic waves is arranged between the inner pot A and a lamp heater B such as a halogen lamp to prevent foreign matter from adhering to the lamp heater B. Further, below the lamp heater B, a reflection plate D for reflecting electromagnetic waves emitted from the lamp heater B toward the inner pot A is arranged. In this rice cooker, mounting of the lamp heater B and assembly of peripheral members including the lamp heater B are poor,
Manufacturing costs were high, and replacement of members due to malfunctions and maintenance work were complicated.

On the other hand, in JP-A-6-327552, as shown in FIG. 13, a heater unit F in which a lamp heater B is housed in a heat insulating material E having the function of a reflecting plate is supported by a heater cover G. While the upper end of the heater unit F is pressed against the protective plate C by the urging force of the coil spring H, the heater cover G and the protective plate C are fixed to the lower end flange portion of the inner frame I that houses the inner pot A, A rice cooker is disclosed that facilitates the assembly of the heater cover G and the protective plate C and makes it difficult for the heat of the heater unit F to escape to the outside to improve the heating efficiency.

[0005]

However, in the rice cooker disclosed in Japanese Patent Laid-Open No. 6-327552, although the heat insulating material E and the lamp heater B are unitized, the heater cover G and the protective plate are included. Since C has a structure in which it is separately fixed to the lower end flange portion of the inner frame I, the assembling property has not been sufficiently improved, and the manufacturing cost is still high, and replacement of members and maintenance work are difficult. It is complicated.

Further, due to variations in dimensional tolerances of the lamp heater B and thermal expansion of the heat insulating material E, rattling occurs between the lamp heater B and its supporting portion, the pipe portion of the lamp heater B is damaged, and the rice cooker is damaged. Problems such as rattling noise may occur during movement.

Further, no measures are taken to prevent water droplets or broth from entering the heater cover G along the protective plate C, and the heat insulating material E or the halogen heater B may be contaminated by water droplets or broth. The heating efficiency may decrease due to deterioration.

In view of the above, the present invention has an object to provide a rice cooker in which the assemblability and functionality of the lamp heater and its peripheral members are improved.

[0009]

A means for solving the problems according to the present invention is an inner pot which is detachably mounted in a rice cooker body, a lamp heater which is arranged below the inner pot and is bent in an annular shape, and a lamp. A glass protective plate arranged between the heater and the inner pot, a reflection plate for reflecting electromagnetic waves emitted from the lamp heater in the direction of the inner pot, and a heat insulating plate arranged to cover the reflector plate. It is characterized in that the lamp heater, the protection plate, the reflection plate and the heat insulation plate are unitized and detachably mounted in the rice cooker body.

Here, the unitization means that the tube portion of the lamp heater is supported by the first supporting member provided on the reflecting plate, and the terminal portion of the lamp heater arranged outside the heat insulating plate is provided on the heat insulating plate. Supported by the second support member, the protective plate is placed on the reflecting plate, and the upper peripheral edge portion of the protective plate and the lower peripheral edge portion of the reflective plate are sandwiched by the bent peripheral edge portions of the heat insulating plate. .

Further, a water reservoir for accumulating water droplets, boiling water, etc. leaking from the peripheral edge of the protective plate is provided at the peripheral edge of the reflector, a first drainage hole is formed in the water reservoir, and a first drain hole is provided at the peripheral edge of the heat insulating plate. It is characterized in that a second water draining hole is formed for discharging water droplets or broth from the one water draining hole to the outside of the heat insulating plate.

Further, the first support member is provided with an arcuate support portion for fitting the tube portion of the lamp heater, and the second support member is provided with an arcuate support portion for fitting the terminal portion of the lamp heater. It is characterized by that.

Further, the first support member is made of a heat-resistant material having elasticity, and an elastic body is interposed between the second support member and the tube portion of the lamp heater.

The second support member is provided with an enclosing piece that encloses the lamp heater arranged outside the heat insulating plate, and a ventilation hole is formed in the enclosing piece.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 2, the rice cooker of the present invention has a short cylindrical outer case 1a and an outer case 1a.
The rice cooker main body 1 has an outer shell formed from a bottom case 1b engaged and fixed to the lower end of the rice cooker, and a lid 2 that can be opened and closed to cover the top opening of the rice cooker main body. Is detachably attached. The lid 2 has an inner pot 3 on its lower surface.
An inner lid 4 that covers the opening of the upper surface of the is opened and formed in a hollow shape, and a heat retaining heater is mounted inside the hollow to perform a heat retaining function.

Inside the rice cooker body 1, an inner pot 5 for accommodating the inner pot 3, a heater unit 6 detachably attached to the lower end of the inner pot 5, and the inner pot 5 and the heater unit 6 are covered. There is an outer pot 7 arranged with a space in between.

The inner pot 3 is in the form of a short cylinder with a bottom having a curved surface with a slightly depressed bottom surface, and a metal having high thermal conductivity, heat resistance and impact resistance, such as aluminum or aluminum alloy, as a base material. To do. A fluororesin-based coating layer is formed on the inner surface of the inner pot 3 in order to improve cleanability, and the cooked rice attached to the inner pot 3 can be easily washed off. Also,
The outer surface of the inner pot 3 absorbs electromagnetic waves of far-infrared rays from visible light having a wavelength of 0.3 to 5.6 μm and has a wavelength of 5.
A black selective absorption film having a characteristic of reflecting electromagnetic waves of 6 to 25 μm is formed.

The inner pot 5 has a substantially short cylindrical shape, and at least the inner surface thereof is a reflecting surface made of aluminum or aluminum alloy having a specular gloss with a bright smooth surface finish having high reflection efficiency, or a bright aluminum-plated steel plate. Further, the reflective surface is coated with an alumite coating having heat resistance and corrosion resistance. The inner pot 5 has its upper end held by the rice cooker body 1 via a holder 8 and is arranged with a gap so as to cover the side surface of the inner pot 3 housed inside.

As shown in FIG. 1, the heater unit 6 includes a lamp heater 10 disposed below the inner pot 3 and emitting an electromagnetic wave bent in an annular shape, and a space between the lamp heater 10 and the inner pot 3. A glass-made protective plate 11 that transmits electromagnetic waves, a reflection plate 12 that reflects the electromagnetic waves emitted from the lamp heater 10 in the direction of the inner pot 3, and a gap is formed so as to cover the reflection plate 12. The heat insulating plate 13 arranged is integrally unitized. That is, the lamp heater 10 is supported by the reflecting plate 12 and the heat insulating plate 13, the protective plate 11 is placed on the reflecting plate 12, and the upper peripheral edge portion of the protective plate 11 and the lower peripheral edge portion of the reflecting plate 12 are heat insulating plate 13.
It is integrally united by being sandwiched by the peripheral edge of the.

The central portion of the lamp heater 10 is bent in an annular shape so that both ends of the straight shape are parallel and close to each other. The both ends of the straight shape are a reflection plate 12 and a heat insulating plate 13.
It is arranged so as to penetrate through the outer pot 7 and project outside the outer pot 7, and the center portion of the ring is on the perpendicular line passing through the center of the bottom surface of the inner pot 3 and the inner pot 3 It is arranged to be parallel to. And the lamp heater 10
The tube portion 14 in the center portion of the heat insulating plate 13 is supported by the first supporting member 15 described later provided on the reflecting plate 12, and the pair of terminal portions 16 attached to the ends of the straight ends.
It is supported by a second support member 17, which will be described later, provided on the. The lamp heater 10 is composed of a heating element that generates an electromagnetic wave having a wavelength in the far infrared region from visible light, and a halogen heater, a quartz glass tube heater or the like is suitable. If a halogen heater is used and the rice cooking capacity is 1 liter to 1.8 liter, it is 800 at 100 VAC.
It is common to use one having a W to 1200 W rating.

The protective plate 11 is an uncolored transparent glass plate or a colored transparent glass plate made of crystallized glass having a high thermal shock resistance that transmits electromagnetic waves having a wavelength in the far infrared region from the visible light emitted from the lamp heater 10. The peripheral portion thereof is placed on the peripheral portion of the reflection plate 12 so as to close the lower surface opening of the inner pot 5. As described above, the protection plate 11 is located between the inner pot 3 and the lamp heater 10 to prevent the lamp heater 10 from being damaged due to a foreign substance falling and to prevent water droplets, simmered liquid, etc. from adhering to the lamp heater 10. It is preventing. If the protective plate 11 is a colored transparent glass plate of red, brown, purple, white, etc., the lamp heater 10 becomes difficult to see when the inner pot 3 is detached from the rice cooker body 1, and the effect of improving the design is obtained. is there.

The reflecting plate 12 is in the shape of a bowl having a bottom, and is arranged so as to surround the annular central portion of the lamp heater 10. At least the inner surface of the reflecting plate 12 has a bright smooth surface finish with good reflection efficiency, like the inner pot 5. The reflection surface is made of a mirror-finished aluminum or aluminum alloy having a specular luster, or a bright aluminum-plated steel sheet, and the reflection surface is coated with an alumite coating having heat resistance and corrosion resistance. Thereby, the electromagnetic wave from the lamp heater 10 is efficiently reflected in the direction of the inner pot 3 to improve the thermal efficiency, and the heat insulating effect of the peripheral portion of the reflector 12 is enhanced.

The periphery of the reflector 12 is shown in FIG.
As shown in FIG. 4, a mounting portion 20 that is an annular flat surface on which the peripheral edge portion of the protective plate 11 is mounted, and a mounting portion 20 located on the outer periphery of the mounting portion 20 and downward from the end portion of the protective plate 11. A water reservoir 21 for storing leaked water droplets or broth is integrally formed with a bend. The water reservoir 21 has an annular groove shape, and a plurality of first drainage holes 21a are formed on the lower surface thereof at regular intervals. The outer side surface of the water reservoir 21 is arranged so as to face the outer side surface of the protective plate 11 placed on the placing part 20, and has a function of positioning the protective plate 11.

Furthermore, the lamp heater 1 is provided on the reflector 12.
Two first support members 15 that support the tube portion 14 of 0 are provided, and as the first support member 15, it is necessary to use a material that can withstand radiant heat from electromagnetic waves from the lamp heater 10. , Therefore spring steel, stainless steel,
A heat-resistant plate material having elasticity such as titanium alloy, nickel chrome steel, or phosphor bronze is used. As shown in FIG. 5, the first support member 15 includes a mounting piece 15 a fixed to the bottom surface of the reflection plate 12 with a screw 25, and the mounting piece 1 a.
This structure has a simple structure in which a standing piece 15b, which is erected outward from 5a, is integrally bent and formed. Further, since the first support member 15 has elasticity, variations in dimensional tolerance of the lamp heater 10 are absorbed, and the lamp heater 10 due to thermal expansion of the reflection plate 12 is absorbed.
It is possible to eliminate the rattling of the rice cooker and prevent a problem that rattling noise is generated while the rice cooker is moving.

An arcuate notch 15c is formed in the standing piece 15b, and the arcuate piece 15 is formed around the notch 15c.
An arc-shaped support portion 26 is formed by protruding d to fit the tube portion 14. The arc-shaped support portion 26 facilitates support of the tube portion 14 of the lamp heater 10 and The lamp heater 10 is prevented from being scratched.
We are trying to extend the life of the.

As shown in FIG. 6, the first supporting member has elasticity such as piano wire, hard steel wire, spring steel wire, celite type resistance alloy (Kanthal wire: manufactured by Kanthal Co., Ltd.), tungsten, and the like. You may use heat resistant wire,
A screw 27 that attaches this heat resistant wire to the bottom surface of the reflector 12.
An arc-shaped support portion 26 that is fitted around the pipe portion 14 by winding and fixing the pipe portion 14 and bending the erected portion in an arc shape.
May be configured. In this way, by using the wire rod having the arc-shaped support portion 26 as the first support member, the processing is further simplified, and the same effect as described above can be obtained.

The heat insulating plate 13 is in the form of a short cylinder having a bottom, and is made of an iron plate plated with aluminum or an alloy of aluminum in approximately the same proportion, or stainless steel, and the space between the heat insulating plate 13 and the reflecting plate 12. Becomes an insulation layer,
In combination with this heat insulating layer, the heat insulating effect and the thermal efficiency are improved, and the safety is enhanced.

The periphery of the heat insulating plate 13 is shown in FIG.
As shown in FIG. 4, the mounting portion 3 that is an annular flat surface on which the peripheral portion of the lower surface of the reflection plate 12, that is, the bottom surface of the water reservoir 21 is mounted.
0, a positioning portion 31 in the shape of a short cylinder that stands up from the mounting portion 30 along the outer surface of the water reservoir portion 21 and positions the reflection plate 12, and extends horizontally outward from the upper end of the positioning portion 31. The flange portion 32 and the flange portion 32 are integrally bent.

A second drainage hole 30a is formed in the placing portion 30 for discharging water drops or spilled water corresponding to the first drainage hole 21a of the water reservoir 21 to the outside of the heat insulating plate 13. Has been done. Further, in the mounting portion 30, cut-and-raised ribs 33 as shown in FIG. 4 are arranged at several positions corresponding to the first drain holes 21 a of the water reservoir 21, and the first drain holes of the water reservoir 21 are arranged. By fitting the cut-and-raised ribs 33 into 21a, the first water draining hole 21a and the second water draining hole 30a can be aligned, and the positioning of the reflection plate 12 is strengthened to eliminate rattling. In addition, a cut-and-raised rib is formed around the first drainage hole 21a of the water reservoir 21 of the reflection plate 12, and the cut-and-raised rib is fitted into the second drainage hole 30a of the mounting portion 30 of the heat insulating plate 13. You may choose not to.

Further, the engaging claws 3 are provided at four positions of the positioning portion 31.
4 are formed respectively, and the engaging claws 34 are formed by making cuts at four portions of the portion which will be the flange portion 32 and bending the flange portion 32 to form the positioning portion 3
1. Four engaging claws 34 are located on the extension of 1, and the engaging claws 34 are bent inward in the direction opposite to that of the flange portion 32, so that the engaging claws 34 and the mounting portion 30 are separated from each other. The peripheral edge of the upper surface of the protective plate 11 and the lower surface of the water reservoir 21 of the reflecting plate 12 are sandwiched. Further, the flange portion 32 is detachably fixed to the lower end flange 5a of the inner pot 5 with a screw 35.
As a result, the reflector 12 and the protective plate 11 become the heat insulating plate 1.
A heater unit 6 is detachably attached to the inner pot 5 held by the unit 3. In FIG. 1, reference numeral 32a is a hole for inserting the screw 35 formed in the flange portion 32.

Further, the heat insulating plate 13 has a lamp heater 1
The second support member 17 that supports the 0 terminal portion 16 is provided, and as the second support member 17, it is necessary to use a material that can withstand the radiant heat from the electromagnetic waves from the lamp heater 10. Like the support member 15, a heat-resistant plate material such as spring steel, stainless steel, titanium alloy, nickel chrome steel, or phosphor bronze is used.

As shown in FIGS. 7 and 8, the second support member 17 has a pair of mounting pieces 41 fixed to the side surface of the heat insulating plate 13 by screws 40, and protrudes outward from each mounting piece 41. And a pair of arm pieces 42 that are substantially L-shaped when viewed from the side and that penetrate the side surface of the outer pot 7, and a connecting piece 43 that connects the tips of the arm pieces 42.

The mounting piece 41 is provided with a positioning projection 41a which fits into a positioning hole 13a formed on the side surface of the heat insulating plate 13. Further, the connecting piece 43 is formed with a circular notch 43a having an open upper portion corresponding to the pair of terminal portions 16 of the lamp heater 10, and an arc piece 43b is provided around the notch 43a excluding the open portion of the upper portion. An arc-shaped support portion 44 is formed so as to be projected and fitted with the terminal portion 16. The arc-shaped support portion 44 facilitates the support of the terminal portion 16 of the lamp heater 10, and It is possible to prevent scratches and extend the life of the lamp heater 10. Further, when the terminal portion 16 is supported by the support portion 44, the electric wire 47 with the electric wire connecting terminal 46 connected to the tip of the terminal portion 16 needs to be inserted into the notch 43a, that is, the support portion 44, and the annular support portion is provided. 44
When the electric wire 47 is inserted, the electric wire connecting terminal 46 interferes with the insertion of the electric wire 47, which may make it difficult or impossible to insert the electric wire 47.
The wiring can be easily done by fitting.

A leaf spring 48, which is an elastic body, as shown in FIG. 9, is interposed between the connecting piece 43 and the tube portion 14 of the lamp heater 10. Both ends of the leaf spring 48 have terminals. A U-shaped notch 48a into which the portion 16 is fitted is formed, and a U-shaped projection 48 in plan view that abuts the connecting piece 43 is formed at the center.
b is formed. The leaf spring 48 is sandwiched between the connecting piece 43 and the end surface of the tube portion 14,
As a result, variations in dimensional tolerances of the lamp heater 10 can be absorbed, rattling of the lamp heater 10 due to thermal expansion of the reflector 12 can be eliminated, and a problem of rattling noise during movement of the rice cooker can be prevented. Further, instead of the leaf spring 48, the compression coil spring 49 may be fitted between the connecting piece 43 and the end surface of the tube portion 14 as shown in FIG.

Further, the second support member 17 has a lamp heater 10 arranged outside the heat insulating plate 13 as shown in FIG.
When the surrounding pieces 50 surrounding both straight ends of the lamp heater 10 are provided, through holes (not shown) and the heat insulating plate 1 formed in the reflection plate 12 and the heat insulating plate 13 through which the straight both ends of the lamp heater 10 penetrate.
It is possible to prevent leakage of electromagnetic waves radiated from the lamp heater 10 outside the rice cooker 3 into the rice cooker body 1.

The surrounding piece 50 is composed of a pair of upper and lower plate members which are inserted into the pair of arm pieces 42 so as to cover the upper surface and the lower surface of the space surrounded by the pair of arm pieces 42 and the connecting piece 43. By forming a pair of vent holes 50a in the upper plate member, it is possible to ventilate the portion surrounding the lamp heater 10 and prevent the temperature rise in the vicinity of the terminal portion 16.

The outer pot 7 is, as shown in FIG.
And a short-cylinder-shaped lower pot 7b arranged to cover the heater unit 6 and a short-cylinder-shaped lower pot 7b arranged to cover the heater unit 6.
The lower pot of the upper pot 7a and the upper end of the lower pot 7b are fixed to each other by bolts 51, and the upper end of the upper pot 7a is held by the rice cooker body 1 via the holder 8.

The outer pot 7 is composed of the inner pot 5 and the heater unit 6.
It plays the role of a partition plate that blocks electromagnetic waves and high temperature air radiated from the outside to the outside. As the material, stainless steel plate such as SUS430 with heat-reflecting efficiency and heat-resistant specular gloss, aluminized steel plate, and aluminum are used. Is suitable. Then, the gap between the inner pot 5 and the heater unit 6 and the outer pot 7 serves as a heat insulating layer to prevent the outer surface of the rice cooker body 1 from becoming hot. A temperature detector 53 is attached to the upper pot 7a via an angle 52, and the temperature detector 53 penetrates the inner pot 5 and is in contact with the lower outer periphery of the inner pot 3. The temperature detected by the temperature detector 53 is transmitted to a control unit such as a microcomputer, and the lamp heater 1
0, energization control of the heat retention heater is performed.

In the above structure, when assembling the heater unit 6, first, the cut-and-raised ribs 33 of the mounting portion 30 of the heat insulating plate 13 are arranged so that the first drain hole 2 of the water reservoir 21 of the reflecting plate 12 is formed.
The water reservoir 21 of the reflecting plate 12 is placed on the placing portion 30 of the heat insulating plate 13 so as to fit into the la, and the second drain hole 30a of the heat insulating plate 13 and the first drain hole 21a of the reflecting plate 12 are placed. And align with.

Then, the lamp heater 10 is mounted on the reflecting plate 12 and the heat insulating plate 13, and the arc-shaped supporting portion 26 of the first supporting member 15 is fitted to the tube portion 14 of the lamp heater 10 to make the first supporting member 15 Is fixed to the reflection plate 12, and the electric wire 47 of the lamp heater 10 is inserted from the open upper portion of the notch 43a of the second support member 17 and inserted into the support portion 44. In this state, the second support member The second support member 17 is formed by fitting the arc-shaped support portion 44 of 17 into the terminal portion 16.
Is fixed to the side surface of the heat insulating plate 13. After that, the envelope piece 50 may be provided on the second support member 17 so as to cover the lamp heater 10 arranged outside the heat insulating plate 13.

Thus, the wiring of the lamp heater 10 can be easily performed without the need for the troublesome work of passing the wire connection terminal 46 of the lamp heater 10 through the support portion 44. Further, the supporting portion 2 into which the lamp heater 10 is fitted
Since 6 and 44 are arcuate, the lamp heater 10 can be prevented from being damaged and the life can be extended. Further, the elasticity of the first supporting member 15 itself and the leaf spring 48 provided on the second supporting member 17 can be used. The variation in the dimensional tolerance of the lamp heater 10 is absorbed, and the rattling of the lamp heater 10 due to the thermal expansion of the reflection plate 12 is eliminated, so that the assemblability of the lamp heater 10 is improved.

Next, the protection plate 1 is placed on the mounting portion 20 of the reflection plate 12.
Place the peripheral portion of 1. At this time, the outer surface of the water reservoir 21 can face the outer surface of the protective plate 11 to position the protective plate 11. Then, the engaging claws 34 of the heat insulating plate 13 are bent inward, so that the engaging claws 34 that are the peripheral parts of the heat insulating plate 13 and the mounting part 30 allow the upper surface peripheral part of the protective plate 11 and the reflection plate 12 to be formed. The lower surface of the water reservoir 21, which is the peripheral edge of the, is sandwiched. Thereby, the lamp heater 10 and the reflector 1
2, the heater unit 6 in which the protective plate 11 and the heat insulating plate 13 are integrally unitized is assembled, and the flange portion 32 of the heat insulating plate 13 is fixed to the lower end flange 5a of the inner pot 5 with the screw 35, thereby the heater unit 6 is attached to the rice cooker body 1. When the peripheral members including the lamp heater 10 are replaced or maintained, the heater unit 6 can be removed from the rice cooker body 1 simply by removing the flange portion 32 of the heat insulating plate 13 from the lower end flange 5a of the inner pot 5. This enables the heater unit 6 to be replaced and maintained easily.

When the rice cooking operation is started, the lamp heater 10 is turned on, and the electromagnetic wave from the lamp heater 10 is directly or reflected by the reflection plate 12 and transmitted through the protection plate 11 to heat the inner pot 3. At this time, the heat insulating effect of the reflection plate 12 and the heat insulating plate 13 can prevent the temperature around the heater unit 6 from becoming high, and the heat insulating effect of the outer pot 7 raises the temperature of the outer surface of the rice cooker body 1. Can be prevented. Further, when the second support member 17 is provided with the surrounding piece 50, the electromagnetic wave from the lamp heater 10 is surely prevented from leaking into the rice cooker main body 1, and a part of the rice cooker main body 1 is brightened to be used by the user. It is possible to prevent the user from feeling uneasy and to prevent the outer surface of the rice cooker body 1 from getting hot. Moreover, by forming the ventilation hole 50a in the surrounding piece 50, it is possible to prevent the temperature rise around the terminal portion 16 of the lamp heater 10, and in particular, there is a problem that the molybdenum foil near the terminal portion 16 becomes hot and breaks. It can be prevented.

When rice cooking is completed and the inner pot 3 is removed from the rice cooker main body 1, the heater unit 6 is protected by the protective plate 11.
The invasion of foreign matter and broth into the inside is prevented. Further, water droplets, simmered liquid, etc. leaking downward from the end portion of the protective plate 11 along the protective plate 11 are accumulated in the water reservoir 21 of the reflection plate 12, and then the first drain hole 21a and the second drain hole 30a. It is possible to prevent the heating efficiency from being lowered due to water droplets or boiled water being infiltrated into the heater unit 6 by passing through the heat insulating plate 13 to contaminate or deteriorate the reflecting plate 12 and the lamp heater 10.

Thus, the lamp heater 10 and the reflector 1
2. Since the protective plate 11 and the heat insulating plate 13 are integrally unitized and detachably mounted in the rice cooker main body 1, the assemblability of the lamp heater 10 and its peripheral members is improved, and the lamp heater 10 is It is possible to easily perform the replacement and maintenance work of the peripheral members including them, and it is possible to extend the life of the lamp heater 10 and improve the heating efficiency and the heat insulating efficiency by the unique structure of each peripheral member.

The present invention is not limited to the above embodiment, and it goes without saying that many modifications and changes can be made to the above embodiment within the scope of the present invention.

[0047]

As is apparent from the above description, according to the invention of claim 1, the lamp heater, the protection plate, the reflection plate and the heat insulation plate are unitized and are detachably mounted in the rice cooker body. As a result, the assembling property of the lamp heater and its peripheral members can be improved and the manufacturing cost can be reduced. Moreover, the peripheral members including the lamp heater can be easily replaced and maintenance work can be performed, and the serviceability is also improved. To do.

According to the second aspect of the present invention, the unitization is possible with a simple structure in which the upper peripheral edge of the protective plate and the lower peripheral edge of the reflector are sandwiched by the bent peripheral edge of the heat insulating plate. Therefore, the assemblability can be further improved.

According to the third aspect of the present invention, the water drop and the broth leaked from the peripheral portion of the protective plate are formed by the water reservoir and the first drainage hole in the peripheral portion of the reflection plate and the second drainage hole in the peripheral portion of the heat insulating plate. Can be discharged to the outside of the heat insulating plate, so that it is possible to prevent problems such as a drop in heating efficiency due to water droplets or broth entering the unit and contaminating or degrading the reflector or lamp heater. The property is improved.

According to the fourth aspect of the present invention, the first supporting member on the reflecting plate side is provided with an arcuate supporting portion for fitting the tube portion of the lamp heater, and the second supporting member on the heat insulating plate side is provided with the lamp heater. Since the arc-shaped support portion that fits the terminal portion is provided, the contact portion of the lamp heater is in surface contact, and the lamp heater can be prevented from being damaged and the life can be extended. Furthermore, when the terminal portion of the lamp heater is supported, since the support portion of the second support member has an arc shape, the electric wire of the lamp heater is fitted into the support portion through the open portion of the support portion, If the support portion and the terminal portion are fitted together in this state, the wiring of the lamp heater can be easily performed without the need for the troublesome work of passing the wire connection terminal or the like attached to the electric wire through the support portion. .

According to the fifth aspect of the invention, the elasticity of the first supporting member itself and the elastic body interposed between the lamp heater and the second supporting member absorb variations in the dimensional tolerance of the lamp heater. It is possible to prevent rattling of the lamp heater due to thermal expansion of the reflector and to prevent rattling noise during movement of the rice cooker, and to prevent damage to the lamp heater due to rattling, thus extending the service life.

According to the sixth aspect of the present invention, the surrounding piece surely prevents the electromagnetic waves radiated from the lamp heater from leaking into the rice cooker body, and a part of the rice cooker body becomes bright to the user. It can prevent anxiety and prevent the outer surface of the rice cooker body from becoming hot. Moreover, by forming the ventilation holes in the surrounding piece, it is possible to prevent a temperature rise around the terminal portion of the lamp heater, and in particular, it is possible to prevent the problem that the molybdenum foil near the terminal portion becomes hot and is broken.

[Brief description of drawings]

FIG. 1 shows a configuration of a heater unit of a rice cooker of the present invention, (a) is a plan view and (b) is a side sectional view.

[Figure 2] Cross section of rice cooker

FIG. 3 is a sectional view of an engaging claw portion of a heat insulating material.

FIG. 4 is a cross-sectional view of a cut and raised rib portion of a heat insulating material.

5A and 5B show a first support member, FIG. 5A is a plan view, and FIG.
Is a side view

FIG. 6 is a side view of another first supporting member.

FIG. 7 is a plan view of a second support member.

FIG. 8 is a front view of a second support member.

FIG. 9 is a front view of a leaf spring.

FIG. 10 is a diagram showing a mounted state of a compression coil spring.

11A and 11B show a configuration of a heater unit when an enclosing piece is provided, FIG. 11A is a plan view, and FIG. 11B is a side sectional view.

FIG. 12 is a sectional view of a conventional rice cooker.

FIG. 13 is a sectional view of another conventional rice cooker.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rice cooker main body 3 Inner pot 10 Lamp heater 11 Protective plate 12 Reflective plate 13 Heat insulating plate 14 Pipe part 15 First support member 16 Terminal part 17 Second support member 21 Water reservoir part 21a First drain hole 26,44 Support part 30a Second drainage hole 48 Elastic body 50 Enclosing piece 50a Vent hole

Claims (6)

[Claims] 1. An inner pot which is detachably mounted in the rice cooker body, a lamp heater which is arranged below the inner pot and is bent in an annular shape, and an inner pot which is arranged between the lamp heater and the inner pot. A protective plate made of glass, a reflection plate for reflecting electromagnetic waves emitted from the lamp heater in the direction of the inner pot, and a heat insulating plate arranged so as to cover the reflection plate, the lamp heater, A rice cooker comprising a protective plate, a reflector and a heat insulating plate which are unitized and detachably mounted in the rice cooker body. 2. The protective plate is placed on the reflection plate, and the upper peripheral edge portion of the protective plate and the lower peripheral edge portion of the reflective plate are sandwiched by the bent peripheral edge portions of the heat insulating plate. The listed rice cooker. 3. A water reservoir for accumulating water droplets, boiling water, etc. leaking from the periphery of the protective plate is provided at the periphery of the reflector, and a first drain hole is formed in the water reservoir, and the periphery of the heat insulating plate is provided at the periphery. The rice cooker according to claim 2, wherein a second drainage hole is formed for discharging water drops, simmered liquid, etc. from the first drainage hole to the outside of the heat insulating plate. 4. A second support member in which a tube portion of the lamp heater is supported by a first support member provided on a reflection plate, and a terminal portion of the lamp heater arranged outside the heat insulation plate is provided on the heat insulation plate. And an arcuate support part for fitting the tube part of the lamp heater to the first support member, and an arcuate support part for fitting the terminal part of the lamp heater to the second support member. The rice cooker according to claim 1, wherein the rice cooker is provided. 5. The rice cooker according to claim 4, wherein the first support member is a heat-resistant material having elasticity, and an elastic body is interposed between the second support member and the tube portion of the lamp heater. vessel. 6. The second support member is provided with a surrounding piece that surrounds the lamp heater arranged outside the heat insulating plate, and a ventilation hole is formed in the surrounding piece. rice cooker.