JP5383625B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker.

Some conventional cooking devices include a heating means that radiates far infrared rays in a cooking chamber, and performs cooking using heat transfer by radiation (radiation) of far infrared rays or heat transfer using air as a medium.
For example, “the upper surface heating means and the lower surface heating means are provided with a coating that emits far infrared rays, and a far infrared emitting body that emits far infrared rays toward the cooked food is detachably provided in the cooking chamber” Has been proposed (see, for example, Patent Document 1).
Further, for example, a proposal has been made that “the heater has a structure in which a flat plate-like heating element whose main component is a carbon material is enclosed in a quartz tube” (see, for example, Patent Document 2).

JP 2009-142417 A (Claim 1, FIG. 1) JP 2002-108553 A (Claim 1, FIG. 1)

  However, in the heating cooker of Patent Document 1 described above, the far-infrared radiator formed on the surface of the heating element and formed as a film repeatedly generates mechanical heat due to the mechanical stress due to the difference in thermal expansion from the heating element. There was a problem of peeling from the body.

In cooking in a heating cooker, volatilization of volatile components contained by baking of heated objects, volatile substances generated from saccharides, amino acids, lipids, etc. by amino-carbonyl reaction, smoke, odor components, etc. Far-infrared radiators may be contaminated by things that have diffused into the cooking chamber or juices / solids scattered by local rupture of the heated object (such as a steam explosion).
Due to such contamination of the far-infrared radiator, there is a problem that the far-infrared radiator formed as a film deteriorates and peels off from the heating element.

  In addition, since the far-infrared radiator is heated by heating means such as a sheathed heater, the far-infrared radiator radiates far-infrared rays, which causes a problem that the rate of temperature rise at the start of heating becomes slow. . In addition, since it is indirect, there is a problem that the response is delayed in temperature control. Moreover, since it is indirect, there was a problem that energy loss occurred.

Further, in the cooking device of Patent Document 2, since far infrared radiation emitted from the heating element passes through the quartz tube glass, radiation into the cooking chamber mainly consists of a radiation wavelength in the near infrared region of 3 μm or less. There is a problem in that light having a wavelength in the infrared region is not sufficiently emitted.
In addition, the quartz tube glass has a weak mechanical strength, and there is a problem that the deterioration due to the volatile components accompanying the above-described cooking and the damage due to the collision of the scattered solid matter occur.

  The present invention has been made to solve the above-described problems, and provides a cooking device that emits a sufficient far-infrared wavelength, has high thermal efficiency and responsiveness, and is excellent in strength and durability. Is.

The cooking device according to the present invention includes a cooking chamber for storing a cooking object, a heating unit provided in the cooking chamber for heating the cooking object, and an electrical insulation, and the heating unit is used for the cooking. A support member that is fixed to the chamber; a connection line that supplies power to the heating unit; and a connection unit that electrically connects the heating unit. The heating unit is formed of a conductive ceramic. Ri Ah with far infrared ceramic heater using the far-infrared radiator as a resistance heating element, the support member, the cooking chamber generally shielded space is formed inside, the connecting means, the space of the support in the member It is characterized by being arranged in .

  The present invention can improve the thermal efficiency and responsiveness of the heating means. In addition, the strength and durability of the heating means can be improved.

It is a perspective view of the whole heating cooker which shows Embodiment 1 of this invention. It is a perspective view of the main body 1 of the state which removed the top plate 4 and the intake / exhaust port cover 5 of the heating cooker which shows Embodiment 1 of this invention. The perspective view of the main body 1 of the state which removed the housing | casing upper surface 3, the top plate 4, the inlet / outlet cover 5, the radiant heater 13, and the induction heating coil unit 11 of the front right side of the heating cooker which shows Embodiment 1 of this invention. It is. FIG. 3 is a perspective view of a right substrate case unit 15 showing Embodiment 1 of the present invention. It is a perspective view which shows the whole cooking chamber 17 which shows Embodiment 1 of this invention. It is a perspective view of the state which removed the upper surface of the cooking chamber 17, and the cooking chamber door 7 which show Embodiment 1 of this invention. It is a disassembled perspective view which shows the attachment structure of the upper heating unit 21 to the cooking chamber 17 which shows Embodiment 1 of this invention. It is the disassembled perspective view which shows the structure of the upper heating unit 21 which shows Embodiment 1 of this invention, and the enlarged view of the connection member 44. FIG. It is side surface sectional drawing of the cooking chamber 17 which shows Embodiment 1 of this invention. It is partial side surface sectional drawing of the upper heating unit 21 part of the cooking chamber 17 of Embodiment 1 of this invention. It is a partial front sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the first embodiment of the present invention. It is a fragmentary sectional side view of the upper heating unit 21 part of the cooking chamber 17 which shows the variation of the connection member 44 of Embodiment 1 of this invention. It is a fragmentary front sectional view of the upper heating unit 21 portion of the cooking chamber 17 showing a variation of the connection member 44 according to Embodiment 1 of the present invention. It is a fragmentary sectional side view of the upper heating unit 21 part of the cooking chamber 17 which shows the variation of the connection member 44 of Embodiment 1 of this invention. It is side surface sectional drawing of the cooking chamber 17 which shows Embodiment 2 of this invention. It is a fragmentary sectional side view of the upper heating unit 21 part of the cooking chamber 17 of Embodiment 2 of the present invention. It is a partial upper surface sectional view of the lower heating unit 50 portion of the cooking chamber 17 according to the second embodiment of the present invention. It is a perspective view which shows the whole cooking chamber 17 which shows Embodiment 3 of this invention. It is a perspective view of the state which removed the upper surface of the cooking chamber 17, and the cooking chamber door 7 which show Embodiment 3 of this invention. It is a disassembled perspective view which shows the attachment structure of the upper heating unit 21 to the cooking chamber 17 which shows Embodiment 3 of this invention. It is the disassembled perspective view which shows the structure of the upper heating unit 21 which shows Embodiment 3 of this invention, and the enlarged view of the connection member 44. FIG. It is side surface sectional drawing of the cooking chamber 17 which shows Embodiment 3 of this invention. It is a fragmentary front sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the third embodiment of the present invention. It is a partial front sectional view of the upper heating unit 21 portion of the cooking chamber 17 showing a variation of the connection member 44 according to Embodiment 3 of the present invention. It is a partial front sectional view of the upper heating unit 21 portion of the cooking chamber 17 showing a variation of the connection member 44 according to Embodiment 3 of the present invention. It is side surface sectional drawing of the cooking chamber 17 which shows Embodiment 4 of this invention. It is a fragmentary sectional side view of the upper heating unit 21 part of the cooking chamber 17 of Embodiment 4 of this invention. It is side surface sectional drawing of the cooking chamber 17 which shows Embodiment 5 of this invention. It is a fragmentary sectional side view of the upper heating unit 21 part of the cooking chamber 17 of Embodiment 5 of the present invention.

Embodiment 1 FIG.
FIG. 1 is a perspective view of the entire heating cooker showing Embodiment 1 of the present invention.
In FIG. 1, the housing | casing upper surface 3 is arrange | positioned at the upper side of the housing | casing 2 of the main body 1 of a heating cooker so that attachment or detachment is possible. An intake / exhaust port cover 5 is disposed on the back side of the upper surface 3 of the housing, and a top plate 4 is disposed in the center.
On the front side of the housing 2, a cooking chamber door 7 is provided in the center. The cooking chamber door 7 can be opened and closed so that an object to be heated cooked in the cooking chamber 17 provided on the back side can be taken in and out of the cooking chamber 17. The cooking chamber door 7 is detachable for maintenance such as cleaning the cooking chamber 17 and the cooking chamber 17 itself.
In addition, operation units 6 are provided on both sides of the cooking chamber door 7 and on the front side of the upper surface 3 of the housing.

  In addition, in this Embodiment, although the cooking chamber 17 is arrange | positioned in the center of the housing | casing 2, this invention is not limited to this. For example, it may be arranged close to either side. Moreover, the effect of the present invention can be similarly obtained even in a configuration in which the operation units 6 on both sides of the cooking chamber 17 are not arranged.

An object to be heated (not shown) is placed on the top plate 4.
In the present embodiment, the heating means capable of cooking by heating is mounted on the top plate 4, but the cooking function on the upper surface may be mounted as necessary. For example, the upper surface may be a simple exterior covering the cooking chamber 17.

  The air intake / exhaust port cover 5 has air permeability, and the airflow of cooling air intake and exhaust and the exhaust air from the cooking chamber 17 pass smoothly with little airflow resistance.

FIG. 2 is a perspective view of main body 1 in a state in which top plate 4 and intake / exhaust port cover 5 of the heating cooker showing Embodiment 1 of the present invention are removed.
A housing exhaust port 9 is provided in the center of the back surface side of the housing upper surface 3, and a housing air intake port 8 is provided on the left and right. The casing exhaust port 9 is connected to the cooling air exhaust air passage 14 and exhausts the cooling air. A cooking chamber exhaust air passage 10 is disposed in the cooling air exhaust air passage 14, and exhaust from the cooking chamber 17 is also performed from the housing exhaust port 9.
In a normal use state, the housing exhaust port 9 is covered with the intake / exhaust port cover 5.

Below the top plate 4, induction heating coil units 11 are arranged on the left and right sides of the front side, and a radiant heater 13 is arranged in the center of the back side. A heated object placed on the top plate 4. Used for heating.
In addition, it mounts according to the necessity of the cooking function on the top plate 4, and when a cooking function on the top plate 4 is unnecessary, mounting may be abbreviate | omitted.

Below the induction heating coil unit 11 and the radiant heater 13, a cooking chamber storage unit 19 is provided, and a cooking chamber 17 is disposed therein.
In the space in the cooking chamber 17, heating cooking such as baking or steaming the object to be heated, steam cooking, or the like is performed.

FIG. 3 shows the main body 1 in a state in which the housing upper surface 3, the top plate 4, the intake / exhaust port cover 5, the radiant heater 13 and the induction heating coil unit 11 on the right side of the front surface of the cooking device according to the first embodiment of the present invention are removed. FIG.
Substrate case units 15 are arranged on both sides of the cooking chamber storage unit 19. The inlets of the substrate case unit 15 are connected to the left and right housing inlets 8 respectively.
A chamber 16 is disposed below the induction heating coil unit 11 and connected to an exhaust port of the substrate case unit 15.
A blower outlet is provided on the upper surface of the chamber 16.
An inlet of the cooling air exhaust air passage 14 is provided behind the cooking chamber storage unit 19.

The cooling air sucked from the housing intake port 8 passes through the substrate case unit 15 and then flows into the chamber 16 connected from the exhaust port of the substrate case unit 15. The cooling air that has flowed into the chamber 16 is blown out from the air outlet on the upper surface of the chamber 16, cools the upper induction heating coil unit 11, and then flows into the cooling air exhaust air passage 14.
Most of the inflowing cooling air is exhausted from the housing exhaust port 9 to the outside of the housing 2. However, since the cooling air exhaust air passage 14 is the same space as the cooking chamber storage portion 19, the periphery of the cooking chamber 17 is cooled. The pressure becomes high due to the pressure of the wind, and after flowing into the cooking chamber 17, it is exhausted from the cooking chamber exhaust air passage 10.

FIG. 4 is a perspective view of the right substrate case unit 15 showing Embodiment 1 of the present invention.
The configuration of the left and right substrate case units 15 is substantially symmetric, and will be described below using the right substrate case unit 15.
The board case unit 15 is provided with a cooling fan 18 and houses an electronic circuit board 12 on which electronic components are mounted.
The electronic circuit board 12 includes a part that becomes an object to be cooled and generates heat, and some have a heat sink (cooling fin) to increase cooling efficiency.
The substrate case unit 15 is formed as a substantially sealed air passage from the intake port on the upper rear side to the exhaust port on the upper front side, and the cooling fan 18 operates to suck cooling air from the intake port. The sucked cooling air passes through the cooling fan 18, cools the object to be cooled on the electronic circuit board 12 inside, and then is sent out from the exhaust port.

FIG. 5 is a perspective view showing the entire cooking chamber 17 showing Embodiment 1 of the present invention.
A cooking chamber exhaust air passage 10 is provided on the back surface of the cooking chamber 17, communicates with the cooking chamber 17, and exhausts smoke and the like generated during cooking in the cooking chamber 17.
A driving gas air passage 40 is provided below the cooking chamber exhaust air passage 10, and the driving gas is blown to the cooking chamber exhaust air passage 10 to induce exhaust in the cooking chamber 17 by the effect of the ejector.
The cooking chamber upper surface 20 is provided with a notch, and a support member 26 is fitted and protrudes.
A heating means connection line 27 is passed through the opening of the support member 26.

A cooking chamber door 7 for opening and closing the opening of the cooking chamber 17 is provided on the front surface of the cooking chamber 17.
The cooking chamber door 7 is opened and closed by sliding back and forth so that the heated object inside can be taken in and out.
The cooking chamber 17 is provided with a door open / close detection means (not shown), detects the open state and the closed state of the cooking chamber door 7, and connects / transmits this open / close information to the control circuit mounted on the electronic circuit board 12. To do.

The detection of the open / closed state by the door open / close detection means detects, for example, that the switch is pushed when the cooking chamber door 7 is slid and closed by a mechanical switch, the switch is turned on, and the cooking chamber door 7 is closed.
However, this detection means is an example, and non-contact detection means for detecting reflection, blocking, etc. of light, ultrasonic waves, magnetism, radio waves, etc. may be used, and means for detecting opening / closing of the cooking chamber door 7 may be used. If provided, the effect of the present invention can be obtained regardless of the detection means.

  An opening (not shown) capable of sucking air is provided in any of the contact portion / joint portion between the cooking chamber exhaust air passage 10 and the cooking chamber 17, the cooking chamber door 7, and the wall surface of the cooking chamber 17. The air intake is smoothly performed and the exhaust is not hindered.

FIG. 6 is a perspective view of a state in which the upper surface of the cooking chamber 17 and the cooking chamber door 7 are removed showing the first embodiment of the present invention.
Above the cooking chamber 17, upper heating units 21 are arranged at three locations on the front side, the center, and the back side. A cooking table 22 on which an object to be heated is placed is disposed below the upper heating unit 21. A lower heating means 23 is disposed below the cooking table 22, and a tray 24 is provided below the heating means 23.
A plurality of temperature sensors 25 are provided on the inner surface of the cooking chamber 17 so that the temperature in the cooking chamber 17 can be detected.
In addition, the temperature sensor 25 in this Embodiment is corresponded to the temperature detection means in this invention.

A cooking chamber exhaust air passage 10 is connected to the back of the cooking chamber 17.
A catalyst body 31 is disposed in the opening of the connecting portion between the cooking chamber exhaust air passage 10 and the back of the cooking chamber 17.
For example, any one of Pd, Pt, and Mn is attached to the catalyst body 31, and when exhaust gas passes through, it adsorbs at least a part of substances such as oily smoke and odor components and oxidatively decomposes and is contained in the exhaust gas. Purifies some of the pollutants.
A suction guide 30 is disposed in front of the rear surface of the cooking chamber 17 and forms an air passage leading to the catalyst body 31.

  In addition, in this Embodiment, although it is set as the structure which heats the to-be-heated object mounted in the cooking table 22 by the upper heating unit 21 and the lower heating means 23 at once from the up-down direction, this invention is limited to this. It is not a thing. The arrangement of the heating means is an example, and the effects of the present invention can be obtained with other arrangements. For example, heating means may be provided only above or below, and similar cooking can be performed by inverting the top and bottom of the object to be heated. Moreover, the structure provided in the side surface of the cooking chamber 17 may be sufficient.

FIG. 7 is an exploded perspective view showing a structure for attaching the upper heating unit 21 to the cooking chamber 17 according to Embodiment 1 of the present invention.
A support member engaging portion 28 is provided at a side end portion of the support member 26. When the support member engaging portion 28 of the support member 26 is engaged with the cooking chamber engaging portion 33, the upper heating unit 21 is engaged with the cooking chamber 17 and temporarily fixed.
A support member fastening hole 34 is provided on a side surface of the support member 26. When the support member 26 is temporarily fixed to the cooking chamber 17, the support member fastening hole 34 becomes substantially coaxial with the cooking chamber fastening hole 35 of the cooking chamber 17, passes through the hexagon bolt 36, and is fixed by the set nut 37.
The set nut 37 is integrated with a nut, a spring washer, and the like. The fastening portion suppresses loosening of the fastening member due to repeated thermal expansion and contraction during cooking, reduces assembly work, and forgets to insert the spring washer. It is preventing.

  In addition, in this Embodiment, although the set nut 37 is used, it does not restrict to this. For example, an individual nut or a spring washer may be used, and other locking prevention means such as a spring nut may be used as locking.

  The upper heating unit 21 disposed on the back side of the cooking chamber 17 is covered with a suction guide 30 on the front side and the lower side of the support member 26. The clearance between the suction guide 30 and the cooking chamber upper surface 20 suppresses the adhesion of dirt due to the suction of exhaust gas.

FIG. 8 is an exploded perspective view showing the structure of the upper heating unit 21 showing Embodiment 1 of the present invention and an enlarged view of the connecting member 44.
In FIG. 8, the upper heating unit 21 at the center shows a state where the protection means 38 is removed and the support member 26 is moved inward.
Further, the upper heating unit 21 on the front side shows a disassembled state of members constituting the connection of the heating means connecting line 27 and the like to the heating means connecting portion 43 with the protection means 38 removed.
Further, the left side (back side) of FIG. 8 shows a state in which the protection means 38 is removed.

A protection means holding portion 39 that is a concave portion is provided on the inner end surface of the cooking chamber 17 of the support member 26.
The protection means 38 is inserted into and engaged with the protection means holding portion 39 of the support member 26.
The protection means 38 is inserted into the protection means holding portions 39 on both sides from the state where the support members 26 on both sides are moved to the end side.
In the state where the upper heating unit 21 is attached to the cooking chamber 17, the distance between the end portions inside the cooking chamber 17 of the support member 26 is shorter than the width of the protection means 38, so that the protection means 38 does not come off. .

Further, the support members 26 at both ends hold the upper heating means 32.
That is, the support member 26 has a function of fixing the upper heating means 32 to the cooking chamber 17 and a function of a holding member for fixing the protection means 38 to the cooking chamber 17.
The support member 26 in the present embodiment corresponds to the support member and the holding member in the present invention.
In this embodiment, the case where the support member 26 also functions as a holding member for the protection means 38 is described. However, the present invention is not limited to this, and the support member for supporting the heating means and the protection means are supported. The holding member may be provided.

The upper heating means 32 is a far-infrared ceramic heater that uses a far-infrared radiator formed of conductive ceramic as a resistance heating element.
The upper heating means 32 self-heats when energized and emits far infrared rays.
Such a resistance heating element of a far-infrared ceramic heater can be formed, for example, by containing Si or FeSi as a conductive material in a ceramic insulating heat-resistant material.
The upper heating means 32 corresponds to the heating means in the present invention.

The protection means 38 is formed so as to cover the lower side of the upper heating means 32.
Since the surface of the upper heating means 32 does not have sufficient electrical insulation, the protection means 38 prevents a person from touching the upper heating means 32 and receiving an electric shock.
In the present embodiment, the protection means 38 is configured to cover the entire lower side of the upper heating means 32 and the bottom, but the present invention is not limited to this, and may be configured to cover at least a part of the upper heating means 32.

Moreover, the protection means 38 is formed so that the far infrared rays radiated from the upper heating means 32 can be transmitted.
For example, the protection means 38 is formed of a metal material such as a wire mesh that is not easily deformed even when touched by a person and has a high aperture ratio, a welded wire mesh that welds each intersection, and an expanded metal.

An electrically insulating coating is applied on the surface of the protection means 38. Thereby, since the insulation of the surface is ensured, even if the upper heating means 32 and the protection means 38 come into contact with each other through a conductive material, the surface of the protection means 38 is kept in the upper heating means. It is electrically insulated without conducting to 32.
The protection means 38 may be formed of an electrically insulating material. Even if it is such a structure, the effect similar to the above can be acquired.

Further, the coating film on the surface of the protection means 38 may be provided with a function as a far-infrared radiator in addition to electrical insulation. When the surface of the protection means 38 is heated by the upper heating means 32, far infrared rays can be radiated and contribute to cooking of the object to be heated.
Note that the material forming the protection means 38 may be a far-infrared radiator. Even if it is such a structure, the effect similar to the above can be acquired.

An electrically insulating coating is applied to the interior side of the cooking chamber upper surface 20, that is, the inner wall near the position where the upper heating means 32 is disposed. Thereby, since the insulation of the indoor side of the cooking chamber upper surface 20 is ensured, even if the upper heating means 32 and the cooking chamber upper surface 20 may contact with each other through a conductive material, the cooking chamber The upper surface 20 is electrically insulated without being electrically connected to the upper heating means 32.
Note that the cooking chamber upper surface 20 may be formed of an electrically insulating material. Even if it is such a structure, the effect similar to the above can be acquired.

In addition, the coating applied to the indoor side of the cooking chamber upper surface 20 may have a function as a far-infrared radiator in addition to electrical insulation. When the cooking chamber upper surface 20 is heated by the upper heating means 32, far infrared rays can be emitted to contribute to cooking of the object to be heated.
In addition, it is good also considering the raw material which forms the cooking chamber upper surface 20 as a far-infrared radiator. Even if it is such a structure, the effect similar to the above can be acquired.

  In addition, although the indoor side surfaces of the protection means 38 and the cooking chamber upper surface 20 preferably have an electrically insulating coating in order to enhance safety, the present invention is not limited to this. For example, safety may be enhanced by increasing the distance between the protective means 38 or the cooking chamber upper surface 20 and the upper heating means 32.

The shape of the protection means 38 is different between the front side, the center, and the back side of the cooking chamber 17, and has a shape in which a lattice plane is arranged in a direction in which a human hand may touch.
Further, since the end of the protection means 38 is convex, the end of the protection means 38 is protected by the protection means 38, for example, to prevent people from touching and injured when cleaning the cooking chamber 17 or the like. It is oriented in the inner direction that is enclosed.
However, there is a risk of injury even if a person touches the protective means 38 by making the convex part at the end part into a shape that does not have an edge by mechanical processing or a coating film and has a constant thickness. If it can be made into a non-existent shape, it does not have to be folded back to the inner side.

At both ends of the upper heating means 32, heating means connection portions 43 are provided.
The heating means connecting portion 43 is formed with a conductive film by a method such as metal spraying of aluminum or the like, soldering, or baking a conductive paste, and the heating means connecting line is used to supply the upper heating means 32 with electric power necessary for heat generation. 27 is electrically connected.

Connection to the heating means connecting portion 43 is made via a connecting member 44.
As shown in the enlarged view of FIG. 8, the connecting member 44 is formed in a shape to be wound around the heating means connecting portion 43, and a connecting member convex portion 47 is provided on the heating means connecting portion 43 surface side.
In addition, the heating means connection part 43 and the connection member 44 of this Embodiment correspond to the connection means in this invention.

In the present embodiment, the claw-like connecting member convex portions 47 are provided on both side surface portions of the winding portion, but the present invention is not limited to this. The same effect can be obtained if a convex shape is provided on the surface of the heating means connecting portion 43 of the winding portion.
In the present embodiment, the case where the connecting member 44 is molded into a shape wound around the heating means connecting portion 43 will be described, but the present invention is not limited to this. Any shape can be used as long as the upper heating means 32 and the heating means connecting wire 27 are electrically connected.

  The connecting member 44 is fastened to the heating means connecting portion 43 by fastening the through portions at both ends of the connecting member 44 by the connecting member fastening member 45, and the connecting means of the heating means connecting wire 27 is coaxially penetrated and fixed together. . Thereby, the upper heating means 32 and the heating means connection line 27 are electrically connected.

FIG. 9 is a side sectional view of cooking chamber 17 showing the first embodiment of the present invention.
As shown in FIG. 9, the upper heating means 32 is arrange | positioned in each center which divided the mounting range of the to-be-heated material of the cooking table 22 into 3 equal parts.

The front side of the upper heating unit 21 on the front side (the left side of the drawing) is such that the cooking chamber top surface 20 has a convex shape downward, so that the cooking chamber top surface 20 functions as a protection means. That is, a part of the protection means is formed by the inner wall of the cooking chamber 17.
Since the cooking chamber upper surface 20 functions as a protection means in this way, the front side of the protection means 38 of the upper heating unit 21 arranged on the front side has no vertical surface and is provided only with edge protection folding. .

  A driving gas blower 41 is arranged in the driving gas air passage 40, and the airflow sucked from the bottom opening of the driving gas air passage 40 is placed in the bottom opening of the vertical portion of the cooking chamber exhaust air passage 10 connected to the top opening. Blow and blow out. As a result, the exhaust in the cooking chamber 17 is sucked into the cooking chamber exhaust air passage 10 by the effect of the ejector.

A catalyst body 31 is disposed in an opening where the cooking chamber exhaust air passage 10 is connected to the cooking chamber 17.
Further, a suction guide 30 is provided from the lower side of the joint opening between the cooking chamber 17 and the cooking chamber exhaust air passage 10 to the upper heating unit 21 on the back side. The suction guide 30 and the cooking chamber upper surface 20 form an air passage, and the cooking chamber exhaust air passage 10 is connected through an opening near the upper heating means 32 on the back side.
The exhaust in the cooking chamber 17 is heated by passing near the upper heating means 32 on the back side, and the temperature of the catalyst body 31 is increased by heat transfer through the exhaust.
Further, since there is no shield between the upper heating means 32 and the catalyst body 31, radiation from the back side of the upper heating means 32 reaches the catalyst body 31 without being blocked, and the catalyst body 31 is heated to a temperature. Is raised.

The protection means 38 is also shaped so as not to be shielded, and the vertical part and the horizontal part on the back side are shaped so as not to cover the upper heating means 32.
In this portion, the suction guide 30 instead of the protection means 38 protects the user's contact with the upper heating means 32.
Since the end portion on the back side of the protection means 38 is located on the back side from the front end portion of the suction guide 30, the edge is protected and no folding is provided.
The front end of the suction guide 30 is in a position that does not block radiation from the upper heating means 32 on the back side to the cooking table 22, and does not hinder radiation to the object to be heated on the cooking table 22.
The front side of the side surface portion of the suction guide 30 covers the front surface from below the support member 26, and is attached to the side surface of the cooking chamber 17 by a suction guide fastening member 46.
The back side of the suction guide 30 is attached to the back side of the cooking chamber 17 by a suction guide fastening member 46.
The suction guide 30 is detachable from the inside of the cooking chamber 17 by attaching and detaching the suction guide fastening member 46.
By removing the suction guide 30, the catalyst body 31 is detachable from the cooking chamber 17 and can be exchanged.

FIG. 10 is a partial side sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the first embodiment of the present invention.
The outer peripheral space where the connecting member 44 is connected to the heating means connecting portion 43 of the upper heating means 32 is covered with the support member 26.
When the connecting member 44 is fastened by the connecting member fastening member 45, the heating means connecting portion 43 is fastened, and pressure is applied to the connecting member convex portion 47, the heating means connecting portion 43 and the contact portion. Thereby, the connection member convex part 47 penetrates the surface of the heating means connection part 43 and bites into the inside, and the connection member 44 and the heating means connection part 43 are fixed.

FIG. 11 is a partial front sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the first embodiment of the present invention.
The upper heating means 32 is inserted into the opening on the cooking chamber side of the support member 26, and the opening on the side surface is fixed in contact with the side surface of the cooking chamber 17. As a result, the space inside the support member 26 is substantially shielded from the space inside the cooking chamber 17.
A space that communicates with the cooking chamber storage portion 19 is provided around the support member 26 so as to draw the heating means connection line 27 out of the cooking chamber 17.
The inside of the cooking chamber storage unit 19 is increased in pressure by the cooling air, and the exhaust from the cooking chamber 17 is sucked by the cooling air exhaust air passage 14 by the driving gas blower 41, so that the pressure decreases. For this reason, the cooling air flows into the cooking chamber 17 from the cooking chamber storage portion 19 through the space in the support member 26 through the upper heating means 32 through the support member 26.

  Next, the operation of the cooking device will be described.

In the cooking device configured in this way, the heating means in the induction heating coil unit 11, the radiant heater 13, and the cooking chamber 17 are controlled by the electronic circuit board 12 by the operation of the operation unit 6, and the cooking by each heating means is performed. Is done.
By providing the induction heating coil unit 11 and the radiant heater 13 above the cooking chamber 17, cooking can be performed on the top plate 4 on the top surface of the main body 1, and the cooking range is widened and high functionality can be achieved.
Here, cooking in the cooking chamber 17 mainly related to the present invention will be described.

In the cooking chamber 17, the object to be heated placed on the cooking table 22 is heated and cooked.
The object to be heated may be a food material such as a fish as it is, or may be a wrapped product or a cooking container.

  The operation unit 6 is operated, the cooking menu of the cooking chamber 17 is selected, and the cooking operation is started.

In the cooking operation of the cooking chamber 17, the opening / closing of the cooking chamber door 7 is detected at all times or in a very short cycle, and in the opened state, the operation associated with cooking is not started, and the upper heating means 32 or The lower heating means 23 is not energized.
In addition, even when the upper heating means 32 and the lower heating means 23 are energized during cooking, when it is detected that the cooking chamber door 7 is open, the energization is stopped and the cooking operation is interrupted. The
At this time, the display means of the operation unit 6 may be informed that the door is open and it is in a dangerous state and cooking is not started / interrupted. For the notification, not only the display means but also a warning sound such as a buzzer or a notification by sound may be used in combination.

  The operation timing and output of the upper heating unit 21 and the lower heating means 23 are controlled by the electronic circuit board 12 based on cooking software corresponding to the selected cooking menu.

  When the heating instruction is given to the upper heating unit 21, a voltage is applied to the upper heating means 32 via the heating means connecting line 27, current flows through the upper heating means 32, Joule heat is generated, and the cooking chamber is heated. .

The heating means connecting line 27 is energized to the heating means connecting portion 43 through the connecting member 44 from the upper heating means 32.
The heating means connecting portion 43 forms a conductive film by a method such as metal spraying such as aluminum or nickel, soldering, or baking of a conductive paste.
Aluminum is widely used because it has good ductility and easily absorbs the difference in thermal expansion from the upper heating means 32.

Since the upper heating means 32 is made of ceramic, it has fine irregularities on the surface, and even if a conductive film is formed by metal spraying or the like, it does not become a smooth surface, and fine irregularities and surface undulations can be made. .
In the case of a material whose surface is easily oxidized, such as aluminum, the contact resistance tends to increase due to the oxide film.
For this reason, when the connection member 44 is fastened by the connection member fastening member 45, the convex connection member convex portion 47 provided on the connection member 44 is not affected by fine irregularities or surface waviness. Point contact can be made across the undulations of the surface. Further, the oxide film formed on the surface of the conductive film is broken by the pressure applied to the connecting member protrusion 47, and bites into the conductive portion and is fixed, thereby reducing the contact resistance and ensuring good conduction.

Moreover, even if the joining part of the heating means connection part 43 and the connection member convex part 47 has acquired favorable conduction | electrical_connection initially, it volatilizes and produces | generates from the foodstuff which is a to-be-heated object with the cooking in the cooking chamber 17. There is a concern that contact resistance may increase due to contact of the components to be spilled, spilled air ruptured by steam in the food material, or oxidation / corrosion due to solid matter.
For this reason, by separating the space in which the joint formed on the support member 26 is disposed and the cooking space of the cooking chamber 17, contact with corrosive gas, steam and solids is suppressed.

  In addition, in a high temperature atmosphere, the rate of progress of oxidation and corrosion is accelerated and accelerated, but by arranging the joint in a space separated from the cooking space of the cooking chamber 17, the heat insulating effect of the support member 26, An increase in temperature is suppressed, an increase in connection resistance is reduced, and the life of the upper heating unit 21 can be extended.

Similarly, corrosive gas is cooked in the internal space of the support member 26 where the joint portion is disposed by cooling air flowing from the space of the cooking chamber storage portion 19 through the internal space of the support member 26 into the cooking chamber 17. Inflow from the inside of the chamber 17 can be reduced.
At the same time, the cooling air passes through the internal space of the support member 26, so that the internal space is cooled, the temperature of the joint portion is further lowered, the rate of oxidation / corrosion can be further reduced, and the lifetime of the upper heating unit 21. Can be made longer.

In the present embodiment, the connecting member 44 is provided with the connecting member convex portion 47 and joined to the heating means connecting portion 43, but the present invention is not limited to this.
For example, as shown in FIGS. 12 and 13, the connecting member fastening member 45 may be fastened with the metal particles 48 attached and sandwiched between the heating means connecting portion 43 and the inner surface of the connecting member 44. .
As a result, the metal particles 48 enter the fine irregularities of the heating means connecting portion 43 with the pressure for fastening the connecting member fastening member 45, break the oxide film, and deform to deform the conductive portion and the connecting member of the heating means connecting portion 43. It adheres to the inner surface of 44 and can fill the gap between the heating means connecting portion 43 and the connecting member 44. Therefore, the contact area of the joint portion between the heating means connection portion 43 and the connection member 44 can be increased, and the contact resistance can be reduced.

If the heating means connecting portion 43 is an aluminum conductive film, the metal particles 48 are preferably 99.999% or more of high-purity aluminum or solder.
The particle size of the metal particles 48 is preferably 80 to 400 mesh, but is preferably 200 mesh or less in consideration of the ease of the metal particles 48 to fit into the fine irregularities (surface roughness) of the conductive film. .

  Further, when the metal particles 48 are inserted into the gaps, if the workability with powder is not excellent, the metal particles 48 are dispersed in an organic solvent (ethanol, isopropyl alcohol, normal propyl alcohol, etc.) that volatilizes at room temperature, and heating means You may apply | coat to the junction part of the connection part 43 and the connection member 44. FIG.

Further, by inserting the support member insertion member 49 into the support member 26, the contact between the cooking chamber 17 wall surface and the upper heating means 32 and the connection member 44 is prevented, and the electrical insulation is enhanced and the lower wall surface thickness is increased. To increase heat insulation.
Moreover, the play with respect to the left and right movement of the upper heating means 32 is regulated to prevent the connecting member 44 from hitting the end surface inside the cooking chamber 17 of the support member 26 and applying a load to the joint portion.
The support member insertion member 49 is made of a material having heat resistance and electrical insulation similar to those of the support member 26, and is made of porcelain, alumina, mullite, zircon, zircon cordierite, forsterite, steatite, magnesia, β-spudumene. Etc. are used.

Moreover, as shown in FIG. 14, you may join the connection member 44 and the heating means connection part 43 by welding. Welding is performed by, for example, resistance welding, and a current is passed through the connecting member 44 and the heating means connecting portion 43 to connect the connecting member 44 to the heating means while melting the contact surface by Joule heat due to resistance between the contact surfaces. Crimped to the conductive portion of the portion 43.
In the case where sufficient contact cannot be obtained due to the unevenness of the surface of the heating means connecting portion 43, conductive metal particles 48 may be interposed therebetween.
Further, as long as the upper heating means 32 can have sufficient strength, welding may be performed by welding using an ultrasonic welding method.

When current flows through the upper heating means 32, heat is generated by Joule heat.
The upper heating means 32 is made of a ceramic material, and the spectral emissivity in the far infrared region approximates that of a black body and is higher than about 0.8, so that the wavelength in the far infrared region is emitted. .

When the upper heating means 32 rises to a temperature of about 500 ° C., the temperature of the upper heating means 32 is calculated by the temperature sensor 25 in the cooking chamber 17, and the upper heating means 32 exceeds 500 ° C., the electronic circuit board The input is controlled by 12 and controlled not to exceed 500 ° C.
The reason why the temperature is set to 500 ° C. is that if the upper heating means 32 of the present embodiment continues to generate heat over 500 ° C. for a long time, the internal composition is changed, the internal resistance increases, and the heating means This is to prevent the characteristics from changing.
In addition, if it can suppress the heat_generation | fever more than predetermined | prescribed temperature according to the use upper limit temperature of the upper heating means 32 and can protect the upper heating means 32, it will not restrict to 500 degreeC.

  In the present embodiment, the temperature sensor 25 is arranged on the wall surface of the cooking chamber 17, but the temperature sensor 25 may be attached to the upper heating means so that the temperature of the upper heating means 32 can be directly measured. good. Thus, by directly measuring the temperature, the temperature control of the upper heating means 32 can be controlled with higher accuracy and less time delay.

Further, the electronic circuit board 12 is provided with a current detection circuit so as to detect the breakage or disconnection of the upper heating means 32. The current detection circuit corresponds to the breakage / disconnection detection means in the present invention.
The current detection circuit provided on the electronic circuit board 12 is in a state where the upper heating means 32 is disconnected and no current flows, or a part of the circuit is damaged (missed) and the resistance value increases and the current value decreases. Is detected. When breakage or disconnection of the upper heating means 32 is detected, control is performed to stop the application of voltage to the upper heating means 32, thereby avoiding a dangerous state.
In addition, you may make it alert | report to a user the meaning which has stopped and the display means (not shown) provided in the operation part 6 has abnormality. The notification to the user is not limited to the display means, and a warning sound such as a buzzer or a sound may be notified at the same time.

  Further, the abnormality associated with the breakage / failure can be detected not only by detecting the current of the upper heating means 32 but also by the signal / data from the temperature sensor 25, so that the failure can be detected with higher accuracy and more detailed. Appropriate control can be performed by detecting the failure mode.

  The lower heating means 23 uses a sheathed heater. However, by detecting the current and temperature, the heater is protected and safety is controlled in the same manner as the upper heating means 32.

  Since the upper heating means 32 is arranged at the center of each of the placement ranges of the object to be heated on the cooking table 22, the radiation from the upper heating means 32 on the front side, the center, and the back side is The distribution of radiation is centered on the front side, center, and back side of the cooking table 22, respectively, and the entire cooking table 22 is radiated substantially uniformly, and the object to be heated on the cooking table 22 is uniformly heated.

As described above, the present embodiment includes the cooking chamber 17 for storing the food to be cooked and the upper heating means 32 provided in the cooking chamber 17 for heating the food to be cooked. The upper heating means 32 is a far-infrared ceramic heater using a far-infrared radiator formed of a conductive ceramic as a resistance heating element.
For this reason, since far-infrared radiators are directly heated, far-infrared rays of 3 μm or more can be sufficiently emitted. Further, since it does not pass through the quartz glass tube or the like, the radiation reaches the object to be heated without being attenuated, so that it can be efficiently replaced with heat near the very surface of the object to be heated (foodstuff). And the water | moisture content of the surface of a to-be-heated material evaporates, and it becomes fragrant, the inside remains moderately moisture, and it is baked to the state where the fire passed, and the far-infrared cooking effect similar to charcoal grilling is acquired.

Further, since the far-infrared radiator is directly heated, the capacity is reduced and the responsiveness is excellent, the heating rate in the cooking chamber 17 is high, and the cooking time can be shortened.
In addition, the heating means can be finely controlled with good responsiveness, and a good cooking effect can be obtained.
Further, since the temperature control is controlled with little time delay, an appropriate and good cooking effect can be obtained.
Moreover, energy loss can be reduced compared with indirect heating, and it is excellent in heating efficiency and can reduce power consumption.

Further, since the heating means itself is formed of a far-infrared radiator, the far-infrared radiator is not lost due to peeling or the like as in the case of a film, and can be used stably for a long period of time.
Further, since the upper heating means 32 is formed of a ceramic heating element, the mechanical strength can be increased and the safety can be increased as compared with a glass tube or the like.
In addition, because it is a ceramic heating element that does not use nichrome wire, it can be used stably over the long term without increasing the reliability due to failure due to disconnection or the separation of far-infrared radiation, and improving reliability. it can.

In addition, since the temperature distribution is relatively uniform because it generates heat as a whole rather than local heat generation, the object to be heated can be heated uniformly with little heating unevenness, and a good cooking effect can be obtained. .
In addition, since the manufacturing method and structure are simple, it can be manufactured at low cost, and a low-cost cooking device with high cooking performance, energy saving, super long life and high reliability can be obtained.

In the present embodiment, at least the inner wall of the cooking chamber 17 in the vicinity of the position where the upper heating means 32 is disposed is formed of an electrically insulating material or a material having an electrically insulating film.
For this reason, electrical insulation with the upper heating means 32 is ensured, and it can be set as a highly safe heating cooker.

Moreover, in this Embodiment, the electrically insulating film | membrane of the cooking chamber upper surface 20 or the raw material of the cooking chamber upper surface 20 is formed with the far-infrared radiator.
For this reason, when the temperature of the cooking chamber 17 rises, far-infrared radiation is emitted into the cooking chamber 17 to increase the heating efficiency, the far-infrared radiation to the object to be heated is made uniform, and uneven heating is reduced. Cooking effect can be obtained, and a cooking device with high cooking performance can be obtained.

In the present embodiment, the protective means 38 is provided at least at a part around the upper heating means 32.
For this reason, the danger of an electric shock due to the user coming into contact with the upper heating means 32 is avoided, and even when the cooking container or food comes in close contact with each other, the protection means 38 inhibits the leakage and prevents damage. can do. Therefore, it can be set as a highly safe heating cooker.

In the present embodiment, the protection means 38 is made of an electrically insulating material, or an electrically insulating film is formed on the surface.
For this reason, even if a conductive material is interposed between the protection means 38 and the upper heating means 32, the protection means 38 does not leak, and electrical insulation is maintained. can do.

In the present embodiment, the coating on the surface of the protection means 38 or the material of the protection means 38 is formed of a far-infrared radiator.
For this reason, when the temperature of the cooking chamber 17 rises, far-infrared radiation is emitted into the cooking chamber 17 to increase the heating efficiency, the far-infrared radiation to the object to be heated is made uniform, and uneven heating is reduced. Cooking effect can be obtained, and a cooking device with high cooking performance can be obtained.

Moreover, in this Embodiment, the support member 26 as a holding member which fixes the protection means 38 to the cooking chamber 17 is provided, and this support member 26 has electrical insulation.
For this reason, when an electrically insulating film is not formed on the surface of the protection means 38, when a conductive material is interposed between the upper heating means 32 and the cooking chamber from the protection means 38 via the support member 26. It is possible to improve the safety by preventing the leakage of electric current to 17. Moreover, when an electrically insulating film is formed on the surface of the protection means 38, double insulation is obtained, and higher safety can be obtained, and a highly safe cooking device can be obtained.

Moreover, in this Embodiment, the support member 26 which fixes the upper heating means 32 to the cooking chamber 17 is provided, and this support member 26 has electrical insulation.
For this reason, even if the surface of the upper heating means 32 does not have sufficient insulation, electrical insulation with the cooking chamber 17 is ensured, and a highly safe cooking device can be obtained.

Further, in the present embodiment, the support member 26 is formed so as to cover at least a part of the connection portion between the upper heating means 32 and the heating means connection line 27.
For this reason, the electrical insulation of the connection part of the upper heating means 32 and the heating means connection line 27 and the cooking chamber upper surface 20 increases, and it can be set as a highly safe heating cooker.

Further, in the present embodiment, the support member 26 functions as both the support of the protection means 38 and the support of the upper heating means 32.
For this reason, while being able to reduce the number of parts, the assemblability can be improved and the cost can be reduced, and a large number of objects to be heated can be stored in the cooking chamber 17 in a space-saving manner. can do.

Further, in the present embodiment, the support member 26 is formed with a space that is generally shielded from the cooking chamber 17, and the heating means connection portion 43 and the connection member 44 are disposed in the space within the support member 26. .
For this reason, while suppressing the contact of the corrosive gas etc. which generate | occur | produce in the cooking chamber 17, the increase in contact resistance by oxidation etc. of a junction part is reduced by shielding from the cooking chamber 17, and the upper heating means 32 Can be used stably for a long time. Therefore, it can be set as the heating cooker with high reliability and a long product life.

Further, in the present embodiment, the heating means connecting portion 43 and the connecting member 44 have the connecting member convex portion 47 formed on the contact surface with the upper heating means 32, and the contact between the connecting member convex portion 47 and the upper heating means 32. It is fixed so that pressure is applied to the part.
For this reason, the oxide film on the surface of the heating means connecting portion 43 is broken to be connected to the internal conductor portion, the contact resistance is reduced, and the upper heating means 32 can be used stably for a long period of time. It can be a long cooking device.

Further, in the present embodiment, metal particles are interposed between the contact surface of the heating means connecting portion 43 and the connecting member 44 with the upper heating means 32 and the upper heating means 32.
For this reason, the connecting member 44 breaks the oxide film on the surface of the heating means connecting portion 43 and adheres to the internal conductor portion, and the contact area increases and the contact resistance is reduced. Therefore, the upper heating means 32 can be used stably in the long term, and a cooking device having high reliability and a long product life can be obtained.

Further, in the present embodiment, the contact surface melts due to Joule heat generated by the current flowing between the contact surface of the heating means connection portion 43 and the connection member 44 with the upper heating means 32 and the upper heating means 32, The heating means connecting portion 43 and the connecting member 44 are connected to the upper heating means 32.
For this reason, the contact resistance is reduced by breaking the oxide film on the surface of the heating means connecting portion 43 to form the inner conductive portion and connecting the molten portion 42, and the upper heating means 32 can be used stably in the long term. It becomes possible, and it can be set as the heating cooker with high reliability and long product life.

Further, in the present embodiment, the heating means connecting portion 43, the connecting member 44, the heating means connecting wire 27, and the upper heating means 32 are supported by the support member 26 so as to be movable within a predetermined range.
For this reason, even if the thermal expansion / contraction of the upper heating means 32 is absorbed, the through portion of the support member 26 has a gap and is slidable. Therefore, the upper heating means 32 itself does not generate unnecessary stress. Can be prevented from being damaged.
Further, since the periphery of the connection member 44 is an internal space of the support member 26 and the heating means connection line 27 is also wired with a gap (likelihood) around the opening above the support member 26, the upper heating means Even with the expansion and contraction of 32, an unnecessary load is not applied to the joint between the connecting member 44 and the heating means connecting portion 43. Therefore, contact failure and increase in contact resistance due to loose joints and the like are suppressed, and a cooking device having high reliability and a long product life can be obtained.

In the present embodiment, at least a part of the protection means 38 is formed by the inner wall of the cooking chamber 17. For example, the inner wall of the cooking chamber 17 is formed so as to protrude around the upper heating means 32, and forms a part of the protection means 38.
Thereby, while suppressing suppression of a user or a to-be-heated material's contact with the upper heating means 32, cost can be reduced by making the shape of the protection means 38 small and simple, and a low-cost and highly safe heating cooker. can do.

In the present embodiment, the temperature sensor 25 that detects the temperature of the upper heating unit 32 is provided, and the energization of the upper heating unit 32 is controlled so that the temperature of the upper heating unit 32 is 500 ° C. or less.
For this reason, since the change of the internal composition of the upper heating means 32 can be suppressed and deterioration of the upper heating means 32 can be suppressed, it can be set as the heating cooker with high reliability and a long product life.

In the present embodiment, a current detection circuit which is a breakage / breakage detection means for detecting at least one of breakage and breakage of the upper heating means 32 is provided, and when the upper heating means 32 is broken or broken, the upper heating means 32 is provided. Is not energized.
For this reason, the temperature rise accompanying the partial breakage of the upper heating means 32 or the electric shock due to the application of the voltage to the end of the disconnection due to the breakage or the user's contact with the end is suppressed, and the cooking device is highly safe. It can be.

Moreover, in this Embodiment, it has the cooking chamber door 7 which opens and closes opening of the cooking chamber 17, and the detection means which detects the open state and closed state of the cooking chamber door 7, When the cooking chamber door 7 is an open state The upper heating means 32 is not energized.
For this reason, it is possible to suppress the risk of electric shock by the user coming into contact with the upper heating means 32 being energized, and a highly safe cooking device can be obtained.

Moreover, in this Embodiment, the cooking chamber exhaust air path 10 which exhausts the air in the cooking chamber 17 and the catalyst body 31 which is arrange | positioned in the cooking chamber exhaust air path 10 and decomposes | disassembles at least one part of an odor component. An exhaust port (suction port) formed by the suction guide 30 and the cooking chamber upper surface 20 is provided in the vicinity of the upper heating means 32.
For this reason, exhaust gas heated when passing in the vicinity of the upper heating means 32 heats the catalyst body 31 and the catalyst body 31 is heated by the radiation of far infrared rays from the upper heating means 32. Therefore, the catalyst such as Pt supported on the catalyst body 31 is activated, and the exhaust gas is purified by adsorption and oxidative decomposition of the components contained in the exhaust gas, so that the heating cooker with high exhaust gas cleanliness can be obtained. .

Embodiment 2. FIG.
In the second embodiment, a configuration in which the cooking chamber upper surface 20, the upper heating unit 21, and the lower heating unit are different from the first embodiment will be described.
Hereinafter, with reference to FIGS. 1 to 4 and FIGS. 15 to 17, portions different from the first embodiment will be mainly described. 1 to 4 are the same as those in the first embodiment.

FIG. 15 is a side cross-sectional view of cooking chamber 17 showing Embodiment 2 of the present invention.
The upper heating means 32 and the lower heating means 23 are arranged at the respective centers obtained by dividing the placement range of the object to be heated on the cooking table 22 into three equal parts.

In the first embodiment, the lower heating means 23 is an integral sheathed heater. However, in the second embodiment, the lower heating means 23 is formed of a conductive ceramic, like the upper heating means 32. A far-infrared ceramic heater that uses the far-infrared radiator as a resistance heating element is used.
Thereby, far-infrared rays are radiated not only from above but also from below, cooking on the upper and lower surfaces of the object to be heated is performed by far-infrared rays, and a better cooking effect is obtained.
In addition, since both the upper heating means 32 and the lower heating means 23 are arranged at the center of each of the placement ranges of the object to be heated on the cooking table 22, far infrared rays are irradiated almost uniformly on the object to be heated. Heating unevenness is reduced, and a better cooking effect / cooking finish is obtained.
The upper heating means 32 and the lower heating means 23 in the present embodiment correspond to the heating means in the present invention.

In the first embodiment, the upper heating means 32 is a solid cylinder. In the second embodiment, the upper heating means 32 and the lower heating means 23 are formed in a hollow cylindrical shape. ing.
As a result, the strength is increased, and the damage caused by the impact of the contact of the heated object to the upper heating means 32 and the lower heating means 23, the transportation of the product or the dropping is further reduced.
Moreover, if the same outer diameter is used, the amount of material used can be reduced, so that the amount of material used can be reduced and the cost can be reduced. Further, the product mass can be reduced, and the transportation cost can be reduced.
Further, if the amount of the material used is the same, the outer diameter can be increased and the surface area can be increased, so that more radiation is possible, heating efficiency is increased, and cooking performance can be improved.

Further, in the first embodiment, the cooking chamber upper surface 20 lowers only the front surface side downward to replace the vertical surface of the protection means 38 to prevent the upper heating means 32 and the user from coming into contact with the electric shock. Was. On the other hand, in the second embodiment, the upper surface 20 of the cooking chamber between the upper heating units 21 is also lowered downward to replace the vertical surface of the protection means 38 at that portion.
In this way, by protecting the upper heating means 32 by the cooking chamber upper surface 20, the vertical surface of the protection means 38 can suppress the risk of electric shock due to contact with the user indirectly from the gap of the lattice, and improve the protection capability. be able to. Further, as compared with the lattice-like protection means 38, the protection by the cooking chamber upper surface 20 formed by the surface is advantageous in terms of strength and the deformation when the object to be heated hits is also suppressed, and the protection capability is improved. To do. Therefore, safety can be improved.
Further, the shape of the protection means 38 can be simplified and reduced in size, and the cost can be reduced.

Moreover, in the said Embodiment 1, the film containing a far-infrared radiator was formed in the room inner side of the cooking chamber upper surface 20, and the protection means 38. FIG. On the other hand, in the second embodiment, at least one of the coating applied to the interior side of the cooking chamber upper surface 20 and the coating on the surface of the protection means 38 is formed of a coating including a far-infrared reflector.
Thereby, the cooking effect of the object to be heated by the far infrared rays is similar to that of the first embodiment, but by reflecting the far infrared rays, the temperature is hardly increased, the deterioration of the coating due to the heat is reduced, and the electrical insulation property is reduced. Maintained. Further, heat leakage from the cooking chamber upper surface 20 is reduced, the heating efficiency in the cooking chamber 17 is improved, the cooling amount in the housing 2 can be reduced, the capacity of the cooling fan 18 can be reduced, and the fan noise can be reduced.
Note that at least one of the material forming the cooking chamber upper surface 20 and the material forming the protection means 38 may be a far-infrared radiator. Even if it is such a structure, the effect similar to the above can be acquired.

FIG. 16 is a partial side cross-sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the second embodiment of the present invention.
The outer peripheral space where the connecting member 44 is connected to the heating means connecting portion 43 of the upper heating means 32 is covered with the support member 26.
As in the first embodiment, the upper heating means 32 and the protection means 38 are supported by the support member 26 and attached to the side surface of the cooking chamber 17 with hexagon bolts 36 and set nuts 37.
As described above, the upper heating means 32 is cylindrical.
Furthermore, a plurality of fine irregularities are provided on the cylindrical surface (outer periphery) of the upper heating means 32.
Thereby, a surface area increases, more far infrared rays are radiated | emitted, a heating effect improves, and a higher cooking effect is acquired.
In the present embodiment, the configuration in which irregularities are provided on the entire circumference of the surface of the upper heating means 32 has been described, but the present invention is not limited to this. Concavities and convexities may be provided on at least the surface (downside) of the upper heating means 32 on the side where the object to be heated is placed. Even if it is such a structure, the heating effect with respect to a to-be-heated material can be improved.
Similarly, the lower heating means 23 may be configured to have a plurality of irregularities on the surface.

  Configurations such as connection between the upper heating unit 21 and the heating means connection line 27 are the same as those in the first embodiment.

FIG. 17 is a partial top cross-sectional view of the lower heating unit 50 portion of cooking chamber 17 according to the second embodiment of the present invention.
The lower heating means 23 and the protection means 38 are supported by the support member 26 and attached to the side surface of the cooking chamber 17 with hexagon bolts 36 and set nuts 37.
The protection means 38 is formed in a cylindrical shape and covers the entire circumference of the lower heating means 23.

As in the first embodiment, a heating means connecting portion 43 is provided at the end of the lower heating means 23, and the connecting member convex portion 47 is joined by the connecting member 44.
The connection member 44 and the heating means connection line 27 are fastened by a connection member fastening member 45.
The opening of the support member 26 through which the lower heating means 23 penetrates is larger than the outer diameter of the lower heating means 23 and is movable in the axial direction.
The support member 26 and the through portion of the heating means connection line 27 on the side surface of the cooking chamber 17 also have a gap, and the heating means connection line 27 is movable.

Other configurations, operations, and effects are the same as those in the first embodiment.
Further, the joining of the connecting member 44 and the heating means connecting portion 43 may be made by using the metal particles 48 or by the melting portion 42 using welding, as in the first embodiment.

As described above, in the present embodiment, the upper heating means 32 and the lower heating means 23 are formed in a cylindrical shape.
For this reason, the intensity | strength of the upper heating means 32 and the lower heating means 23 can be improved, and the failure by breakage can be reduced. Moreover, compared with the case where it forms in a column shape, if it is the same mass, a surface area can be expanded, a radiation amount can be increased to a far infrared ray, and heating efficiency can be improved. Therefore, it can be set as the heating cooker with high reliability and cooking performance.

Moreover, in this Embodiment, several unevenness | corrugation is formed in the surface at the side of the mounting position of a to-be-heated material among the surfaces of the upper heating means 32 and the lower heating means 23. FIG.
Thereby, a surface area can be expanded further, the radiation amount of far infrared rays can be increased, and heating efficiency can be improved. Therefore, it can be set as the heating cooker whose cooking performance is higher.

Moreover, in this Embodiment, the electrically insulating film of the cooking chamber upper surface 20 is formed of the far-infrared reflector.
For this reason, the amount of far-infrared radiation to the inside of the cooking chamber 17 can be increased and cooking performance can be improved. Further, heat leakage into the housing 2 can be reduced, and the capacity of the cooling fan 18 can be reduced. Therefore, it can be set as the heating cooker with a high cooking capability and a low operation noise.

In the present embodiment, the electrically insulating film of the protection means 38 is formed of a far-infrared reflector.
For this reason, the amount of far-infrared radiation to the inside of the cooking chamber 17 can be increased and cooking performance can be improved. Further, heat leakage into the housing 2 can be reduced, and the capacity of the cooling fan 18 can be reduced. Therefore, it can be set as the heating cooker with a high cooking capability and a low operation noise.
For this reason, the amount of far-infrared radiation to the inside of the cooking chamber 17 can be increased and cooking performance can be improved. In addition, the temperature of the film can be lowered, the deterioration of the film can be reduced, and the deterioration of insulation can be reduced. Therefore, safety and cooking performance are high, and it can be set as the reliable and long-life cooking device.

Embodiment 3 FIG.
In the third embodiment, a configuration in which the configuration of the upper heating unit 21 is different from that of the first embodiment will be described.
Hereinafter, with reference to FIGS. 1 to 4 and FIGS. 18 to 25, portions different from those of the first embodiment will be mainly described. 1 to 4 are the same as those in the first embodiment.

FIG. 18 is a perspective view showing the entire cooking chamber 17 showing Embodiment 3 of the present invention.
In the first embodiment, the upper heating means 32 is arranged at three locations on the front side, the center, and the rear side. However, in the second embodiment, the upper heating means 32 is arranged at two locations on the front side and the rear side. The support member 26 also protrudes from the opening of the cooking chamber upper surface 20 at four locations on the front side and the rear side.

FIG. 19 is a perspective view showing a state in which the upper surface of the cooking chamber 17 and the cooking chamber door 7 according to the third embodiment of the present invention are removed.
In the first embodiment, the shape of the upper heating means 32 is a cylindrical shape. However, in the present third embodiment, the upper heating means 32 is formed in a flat plate shape, and the wide surface is the mounting position of the object to be heated. Are arranged to face each other. That is, as shown in FIG. 19, the upper heating means 32 has a flat plate shape whose width direction from the front side to the back side is longer than the height direction (thickness direction).

  In the present embodiment, the case where the upper heating means 32 is formed in a flat plate shape will be described, but the present invention is not limited to this. The lower heating means 23 may also be a far infrared ceramic heater formed in a flat plate shape. Moreover, although the case where the upper heating means 32 is arrange | positioned in two places, the front side and the back side is demonstrated, this invention is not limited to this, Arbitrary number arrangement can be carried out. Further, the arrangement of the upper heating means 32 is an example, and the effects of the present invention can be obtained with other arrangements.

In accordance with the shape of the upper heating means 32, the shapes of the protection means 38 and the support member 26 are also changed as compared with the first embodiment.
Further, the shape of the suction guide 30 is different from that of the first embodiment. In the first embodiment, it is provided between both side surfaces of the cooking chamber 17, but in the second embodiment, it is limited to a part in the width direction. Even with such a configuration, the same functions and effects as those of the first embodiment can be obtained.

FIG. 20 is an exploded perspective view showing a structure for attaching the upper heating unit 21 to the cooking chamber 17 according to Embodiment 3 of the present invention.
The attachment of the upper heating unit 21 to the cooking chamber 17 is the same as that in the first embodiment.

FIG. 21 is an exploded perspective view showing the structure of the upper heating unit 21 showing the third embodiment of the present invention and an enlarged view of the connecting member 44.
In FIG. 21, the upper heating unit 21 on the front side shows a disassembled state of members constituting the connection of the heating means connecting line 27 and the like to the heating means connecting portion 43 with the protection means 38 removed.
Further, the upper heating unit 21 on the back side shows a state in which the protection means 38 is removed.
FIG. 21 also shows an enlarged view of the connection member 44.

The configuration for connecting the upper heating means 32 and the heating means connecting line 27 in the second embodiment is the same as that of the first embodiment, but the heating means connecting line to the upper heating means 32 is the same. The structure of 27 connecting portions is different.
At both ends of the flat upper heating means 32, the heating means connecting portions 43 are provided in the same manner as in the first embodiment. As in the first embodiment, a conductive film is formed on the heating means connection portion 43 by metal spraying of aluminum or the like.

In the second embodiment, the heating means connecting portion 43 is provided with an opening through which the connecting member fastening member 45 penetrates, the ring-shaped connecting members 44 are arranged on the upper and lower sides to sandwich the heating means connecting portion 43, and the heating means connection is made. Together with the wire 27, the connection member fastening member 45 is fastened.
A connecting member convex portion 47 is provided on the outer periphery of the connecting member 44 and protrudes on one surface, and the heating means connecting portion 43 is sandwiched by the surface from which the connecting member convex portion 47 protrudes.
The effect of lowering the contact resistance by breaking the oxide film formed on the surface of the heating means connecting portion 43 by the connecting member convex portion 47 to obtain a contact resistance is the same as in the first embodiment.

FIG. 22 is a side cross-sectional view of cooking chamber 17 showing Embodiment 3 of the present invention.
The upper heating means 32 is disposed at the center of each of the ranges of the object to be heated on the cooking table 22 divided into two equal parts. Thereby, far-infrared rays are irradiated almost uniformly on the object to be heated, and uneven heating is reduced, and a good cooking effect and cooking finish can be obtained.
In the first embodiment, three columnar upper heating means 32 are used. However, in the second embodiment, the surface area can be increased by using the flat upper heating means 32 even if the number is two. Can be obtained. Therefore, while radiating more far infrared rays, it can radiate | emit more uniformly than a to-be-heated material, and while a heating efficiency improves, the more favorable cooking effect and finish are obtained.

FIG. 23 is a partial front sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the third embodiment of the present invention.
The attachment structure of the upper heating means 32 and the heating means connection line 27 is as described above.
As in the first embodiment, the joint between the upper heating unit 32 and the heating unit connection line 27 is disposed in a space in the support member 26 and is movably attached to the support member 26 and the cooking chamber 17. ing. This prevents the joint and the upper heating means 32 from receiving unnecessary stress against the thermal expansion / contraction of the upper heating means 32.

Similarly to the first embodiment, the connecting member 44 and the heating means connecting portion 43 are electrically connected to each other with little contact resistance by the connecting member convex portion 47 biting into the heating means connecting portion 43.
24, the metal particles 48 are sandwiched and fastened. As shown in FIG. 25, an electric current is passed through the connecting member 44 and the heating means connecting portion 43 so as to be melted by Joule heat and joined by the melting portion 42. The same functions and effects as those described in the first embodiment can be obtained.

  Further, as shown in FIGS. 24 and 25, a support member insertion member 49 may be inserted and fixed in the opening on the cooking chamber 17 side of the support member 26. Thereby, when the upper heating means 32 tries to move excessively to the side surface side, it can be prevented from hitting the support member insertion member 49 and moving beyond a predetermined range. From this, similarly to the first embodiment, the connection member 44 on the opposite side face the wall surface of the support member 26 on the cooking chamber 17 side, and unnecessary stress is prevented from being generated at the joint portion with the heating means connection portion 43. In addition, loosening and increase in contact resistance can be suppressed.

  Other functions and effects such as antifouling, heat shielding, insulation, and cooling by passage of cooling air by the support member 26 are the same as those of the first embodiment.

As described above, in the present embodiment, the upper heating means 32 is formed in a flat plate shape, and is disposed so that the wide surface faces the placement position of the object to be heated.
For this reason, the area which radiates | emits the cooking chamber 17 inner side can be enlarged, the radiation amount of far infrared rays increases, heating efficiency increases, and high cooking performance can be obtained. Moreover, since it becomes easy to make radiation | emission to a to-be-heated object comparatively uniform, the heating nonuniformity of a to-be-heated object is reduced, and a favorable cooking effect and finish are obtained. Therefore, it can be set as the heating cooker excellent in cooking performance.

Further, in the present embodiment, the heating means connecting portion 43 and the connecting member 44 have the connecting member convex portion 47 formed on the contact surface with the upper heating means 32, and the contact between the connecting member convex portion 47 and the upper heating means 32. It is fixed so that pressure is applied to the part.
For this reason, the oxide film on the surface of the heating means connecting portion 43 is broken to be connected to the internal conductor portion, the contact resistance is reduced, and the upper heating means 32 can be used stably for a long period of time. It can be a long cooking device.

Further, in the present embodiment, metal particles are interposed between the contact surface of the heating means connecting portion 43 and the connecting member 44 with the upper heating means 32 and the upper heating means 32.
For this reason, the connecting member 44 breaks the oxide film on the surface of the heating means connecting portion 43 and adheres to the internal conductor portion, and the contact area increases and the contact resistance is reduced. Therefore, the upper heating means 32 can be used stably in the long term, and a cooking device having high reliability and a long product life can be obtained.

Further, in the present embodiment, the contact surface melts due to Joule heat generated by the current flowing between the contact surface of the heating means connection portion 43 and the connection member 44 with the upper heating means 32 and the upper heating means 32, The heating means connecting portion 43 and the connecting member 44 are connected to the upper heating means 32.
For this reason, the contact resistance is reduced by breaking the oxide film on the surface of the heating means connecting portion 43 to form the inner conductive portion and connecting the molten portion 42, and the upper heating means 32 can be used stably in the long term. It becomes possible, and it can be set as the heating cooker with high reliability and long product life.

Embodiment 4 FIG.
In the fourth embodiment, the configuration of the related parts around the cooking chamber upper surface 20, the upper heating means 32, and the lower heating means 23 will be described as different from the third embodiment.
Hereinafter, with reference to FIG. 1 to FIG. 4, FIG. 26, and FIG. 27, portions different from the third embodiment will be mainly described. 1 to 4 are the same as those in the first embodiment.

FIG. 26 is a side cross-sectional view of cooking chamber 17 showing Embodiment 4 of the present invention.
In the third embodiment, the lower heating unit 23 uses an integral sheathed heater. However, in the fourth embodiment, the lower heating unit 23 is formed in a cylindrical shape, and is a long distance made of conductive ceramic. A far-infrared ceramic heater using an infrared radiator as a resistance heating element is used.
Further, the supporting member 26, the protection means 38, and the like are attached to the side surface of the combination cooking chamber 17 as the lower heating unit 50.
The configuration, operation, and effect of the lower heating unit 50 are the same as those of the lower heating unit 50 of the second embodiment.

Moreover, in this Embodiment 4, the cooking chamber upper surface 20 is made into the shape which the front part and the back part of the upper heating unit 21 of the front side, and the front part of the upper heating unit 21 of the back side lowered downward, and the part Replaces the vertical plane of the protection means 38.
Thereby, it is possible to prevent the user from coming into contact with the upper heating means 32 from the horizontal direction, and it is possible to suppress the risk of electric shock and the damage of the upper heating means 32 due to the contact with the object to be heated.

The upper heating means 32 is wider in the front-rear direction than in the thickness direction, and has a hexagonal side section. That is, the surface of the upper heating means 32 is formed by a plurality of planes.
In addition, the shape of a side surface cross section is not restricted to this. Of the surface of the upper heating means 32, at least the surface on the side of the placement position of the object to be heated may be formed by a plurality of planes.

Further, the upper heating means 32 on the front side and the upper heating means 32 on the rear side are different in the direction of the wide surface with respect to the placement position of the object to be heated. That is, the attachment angles of the upper heating means 32 on the front side and the upper heating means 32 on the rear side are different.
For example, as shown in FIG. 26, the center of the upper heating means 32 on the front side is in the center on the front side obtained by dividing the heating object placement range of the cooking table 22 into two equal parts on the front side and the back side. Mounted at an angle to face. Further, the center of the upper heating means 32 on the back side is inclined so as to face the center of the back side obtained by dividing the heating object placement range of the cooking table 22 into two parts, the front side and the back side. Mounted.
Thereby, it radiates | emits in the diagonal direction from the vicinity of a front end and a rear end, and compared with the said Embodiment 3, the radiation to the front and back side surface of a to-be-heated object with a high height (thickness) is made. Therefore, the radiation to the portion that was conventionally difficult to receive far-infrared radiation is made, the uneven heating is alleviated, and a better cooking effect / finish can be obtained.

  Further, the surface of the upper heating means 32 is formed by a plurality of planes, and the angle of the inner surface of the cooking chamber 17 between the front side end of the upper heating means 32 on the front side and the rear side end of the upper heating means 32 on the rear side is defined. It has a surface that is almost horizontal. Thereby, far-infrared rays are radiated also near the front end and near the rear end of the cooking table 22 that are not easily radiated when mounted with a simple inclination, and heating unevenness of the object to be heated can be reduced.

  Moreover, far infrared rays are radiated to the cooking table 22 from the side parallel to the inclination direction of the cooking chamber side of the upper heating means 32 toward the front side center and the rear side center of the cooking table 22, and other than the front end and the rear end. The object to be heated is also heated with little heating unevenness.

FIG. 27 is a partial side cross-sectional view of the upper heating unit 21 portion of cooking chamber 17 according to the fourth embodiment of the present invention.
A plurality of fine irregularities are provided on the cooking chamber 17 side surface of the upper heating means 32. Thereby, the surface area can be increased, and even if the width in the front-rear direction is made narrower than the upper heating means 32 of the third embodiment, the surface area contributing to radiation inside the cooking chamber 17 can be made the same. Therefore, the upper heating means 32 can be reduced in size.

As described above, in the present embodiment, among the surfaces of the upper heating means 32, at least the surface on the placement position side of the object to be heated is formed by a plurality of flat surfaces or curved surfaces.
For this reason, since far-infrared rays are uniformly radiated to the entire cooking table 22, the distribution of radiation can be made appropriate, heating unevenness of the object to be heated can be reduced, and a good cooking effect / finish can be obtained. Therefore, a cooking device having high cooking performance can be obtained.

Moreover, in this Embodiment, the some unevenness | corrugation is formed in the surface at the side of the mounting position of a to-be-heated material among the surfaces of the upper heating means 32. FIG.
For this reason, the upper heating means 32 can be reduced in size with the same radiation area, and cost can be reduced. Further, the radiation area of the far infrared ray can be increased by increasing the radiation area with the same size of the upper heating means 32. Therefore, since heating efficiency increases, cooking performance can be improved, and it can be set as a cheap cooking cooker with high cooking performance.

Further, in the present embodiment, a plurality of upper heating means 32 are provided, and at least a part of the plurality of upper heating means 32 is such that the orientation of the wide surface with respect to the placement position of the object to be heated is the other upper heating means 32. And different.
For this reason, the side surface in the front-and-rear direction of the object to be heated is also susceptible to far-infrared radiation, and the heating unevenness of the object to be heated is reduced. Can do.

Embodiment 5 FIG.
In the fifth embodiment, the configuration of the related parts around the cooking chamber upper surface 20, the upper heating means 32, and the lower heating means 23 will be described as different from the fourth embodiment.
Hereinafter, with reference to FIGS. 1 to 4, FIG. 28, and FIG. 1 to 4 are the same as those in the first embodiment.

FIG. 28 is a side cross-sectional view of cooking chamber 17 showing Embodiment 5 of the present invention.
In the fourth embodiment, a cylindrical conductive far-infrared ceramic heater is used as the lower heating means 23. However, in the fifth embodiment, the lower heating means 23 is formed in a flat plate shape with a wide surface covered. It arrange | positions so that the mounting position of a heating thing may be opposed. That is, as shown in FIG. 28, the lower heating means 23 has a flat plate shape whose width direction from the front side to the back side is longer than the height direction (thickness direction). Furthermore, among the surfaces of the lower heating means 23, the surface on the side where the object to be heated is placed has a cross-sectional shape composed of a plurality of curved surfaces.
In FIG. 28, a detailed change in curvature on the curved surface is difficult to express, and is therefore simplified.

The lower heating means 23 is disposed below the center of the cooking table 22 divided into three equal parts on the front side, the center, and the back side.
Since the distance between the bottom surface of the object to be heated placed on the cooking table 22 and the lower heating means 23 is short, in the case of the cylindrical lower heating means 23, the distance is different between the upper side of the lower heating means 23 and the diagonally upper side. The amount of far-infrared rays received from the lower heating means 23 is different, and heating unevenness may occur. On the other hand, as in the fifth embodiment, the radiation area is increased as a shape having a wider width in the front-rear direction than in the thickness direction, and the radiation direction is appropriately adjusted by configuring the radiation surface with a plurality of curved surfaces. And nonuniformity of radiation to the object to be heated can be reduced.

  The connection of the connecting member 44 to the lower heating means 23 and the configuration / operation / effect of the lower heating unit 50 are the same as those of the upper heating unit 21 of the third embodiment.

  Similarly to the lower heating means 23, the upper heating means 32 also uses a conductive far-infrared ceramic heater and has a cross-sectional shape constituted by a plurality of curved surfaces having a width in the front-rear direction wider than the thickness direction.

  The upper heating means 32 in the fifth embodiment is attached with an inclination so as to radiate toward the center of the cooking table 22 divided into two equal parts on the front side and the back side, as in the fourth embodiment. The upper heating means 32 on the front side is arranged on the front side from the center, and the upper heating means 32 on the back side is arranged on the back side from the center. Thereby, the side surface of the to-be-heated object is easy to receive far-infrared radiation.

  Further, the upper heating means 32 in the fifth embodiment has a cross-sectional shape in which the surface of the object to be heated on the placement position side is constituted by a plurality of curved surfaces. For example, the radiation surface of the upper heating means 32 is combined with a plurality of curved surfaces having different curvatures so that the object to be heated arranged at the front side end and the back side end of the cooking table 22 can receive radiation in the far infrared rays. And the direction of radiation is adjusted appropriately while changing the curvature.

  In the fourth embodiment, the upper surface 20 of the cooking chamber has a shape in which the front surface portion is lowered downward to the front surface / rear surface portion of the upper heating unit 21 on the front surface side and the upper heating unit 21 on the rear surface side. On the other hand, in the fifth embodiment, the back surface portion of the upper heating unit 21 on the front side and the front surface portion of the upper heating unit 21 on the back surface are integrally lowered, and the vertical surface of the protection means 38 is substituted. doing. Thereby, the user's contact with the upper heating means 32 from the horizontal direction of the cooking chamber upper surface 20 is prevented, and the risk of electric shock and the damage of the upper heating means 32 due to the contact with the object to be heated are suppressed.

  Moreover, in this Embodiment 5, the cooking chamber upper surface 20 is made into the shape which integrally lowered the back part of the upper heating unit 21 of the front side, and the front part of the upper heating unit 21 of the back side. It can be a flat shape. For this reason, while contact and collision of the to-be-heated material etc. to the cooking chamber upper surface 20 are also reduced, the cleaning property of the dirt by scattering of to-be-heated material and adhesion of oil smoke can be improved. Moreover, compared with the said Embodiment 4, the downward convex shape of the cooking chamber upper surface 20 changes from two places to one place, processing becomes easy and a shape is simplified and it can reduce cost. .

FIG. 29 is a partial side cross-sectional view of the upper heating unit 21 portion of the cooking chamber 17 according to the fifth embodiment of the present invention.
A plurality of fine irregularities are provided on the inner surface of the cooking chamber 17 of the upper heating means 32.
As a result, the surface area can be increased, and the surface area contributing to radiation inside the cooking chamber 17 can be made the same even if the width in the front-rear direction of the upper heating means 32 is reduced as compared with the third embodiment. The upper heating means 32 can be reduced in size.

In addition, although this Embodiment demonstrated the structure which provides an unevenness | corrugation in the cooking chamber 17 inner surface among the surfaces of the upper heating means 32, this invention is not limited to this. Concavities and convexities may be provided on the entire circumference of the surface of the upper heating means 32. Even if it is such a structure, the heating effect with respect to a to-be-heated material can be improved.
Similarly, the lower heating means 23 may be configured to have a plurality of irregularities on the surface.

As described above, in the present embodiment, among the surfaces of the upper heating means 32, at least the surface on the placement position side of the object to be heated is formed by a plurality of curved surfaces.
For this reason, far infrared rays can be uniformly radiated to the entire cooking table 22, and the distribution of radiation can be made appropriate. Therefore, uneven heating of the article to be heated can be reduced, a good cooking effect / finish can be obtained, and a cooking device with high cooking performance can be obtained.

Moreover, in this Embodiment, the some unevenness | corrugation is formed in the surface at the side of the mounting position of a to-be-heated material among the surfaces of the upper heating means 32. FIG.
For this reason, the upper heating means 32 can be reduced in size with the same radiation area, and cost can be reduced. Further, the radiation area of the far infrared ray can be increased by increasing the radiation area with the same size of the upper heating means 32. Therefore, since heating efficiency increases, cooking performance can be improved, and it can be set as a cheap cooking cooker with high cooking performance.

Further, in the present embodiment, a plurality of upper heating means 32 are provided, and at least a part of the plurality of upper heating means 32 is such that the orientation of the wide surface with respect to the placement position of the object to be heated is the other upper heating means 32. And different.
For this reason, the side surface in the front-and-rear direction of the object to be heated is also susceptible to far-infrared radiation, and the heating unevenness of the object to be heated is reduced. Can do.

In the present embodiment, at least a part of the protection means 38 is formed by the inner wall of the cooking chamber 17. For example, the inner wall of the cooking chamber 17 is formed so as to protrude around the upper heating means 32, and forms a part of the protection means 38.
Thereby, while suppressing suppression of a user or a to-be-heated material's contact with the upper heating means 32, cost can be reduced by making the shape of the protection means 38 small and simple, and a low-cost and highly safe heating cooker. can do.

In the present embodiment, the back surface of the upper heating means 32 on the front side and the front surface of the upper heating means 32 on the back side are integrally lowered.
For this reason, the cooking chamber upper surface 20 has a flat shape, and the contact and collision of an object to be heated with the cooking chamber upper surface 20 are reduced, and the cleaning property of dirt due to scattering of the object to be heated and adhesion of oil smoke is improved. . Moreover, the downward convex shape of the cooking chamber upper surface 20 can be made into one place, it becomes easy to process, and the shape can be simplified and the cost can be reduced. Therefore, it is excellent in safety | security and cleanability, and it can be set as an inexpensive heating cooker.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 housing | casing, 3 housing | casing upper surface, 4 top plate, 5 air intake / exhaust port cover, 6 operation part, 7 cooking chamber door, 8 housing air intake port, 9 housing exhaust port, 10 cooking chamber exhaust air path, DESCRIPTION OF SYMBOLS 11 Induction heating coil unit, 12 Electronic circuit board, 13 Radiant heater, 14 Cooling air exhaust air path, 15 Substrate case unit, 16 Chamber, 17 Cooking room, 18 Cooling fan, 19 Cooking room storage part, 20 Cooking room upper surface, 21 Upper heating unit, 22 Cooking table, 23 Lower heating means, 24 Receptacle, 25 Temperature sensor, 26 Support member, 27 Heating means connection line, 28 Support member engaging part, 30 Suction guide, 31 Catalyst body, 32 Upper heating means, 33 Cooking room engaging part, 34 Support member fastening hole, 35 Cooking room fastening hole, 36 Hexagon bolt, 37 Set nut, 38 Protection means, 39 Protective hand Step holding part, 40 driving gas air path, 41 driving gas blower, 42 melting part, 43 heating means connecting part, 44 connecting member, 45 connecting member fastening member, 46 suction guide fastening member, 47 connecting member convex part, 48 metal particles 49 Support member insertion member, 50 Lower heating unit.

Claims (25)

A cooking chamber for storing the food,
A heating means provided in the cooking chamber for heating the cooking object ;
A support member having electrical insulation and fixing the heating means to the cooking chamber;
Connecting means for electrically connecting the heating means and a connecting line for supplying electric power to the heating means;
With
Said heating means, Ri Ah with far infrared ceramic heater using the far-infrared radiator formed by a ceramic having conductivity as a resistance heating element,
The support member is formed with a space generally shielded from the cooking chamber,
The cooking device according to claim 1, wherein the connecting means is disposed in a space in the support member . The support member is
An opening into which an end of the heating means is inserted;
An opening into which the connection line is inserted is formed,
The connecting means includes
The connection line and the end of the heating means are electrically connected inside the space.
The cooking device according to claim 1, wherein: An exhaust air passage for exhausting air in the cooking chamber;
A blower for sucking air in the cooking chamber into the exhaust air passage;
With
The space in the support member is
Communicating with the cooking chamber through an opening into which an end of the heating means is inserted;
It communicates with the outside of the cooking chamber through an opening in which the connection line is inserted.
The cooking device according to claim 2, wherein The cooking device according to any one of claims 1 to 3, wherein the heating means is formed in a cylindrical shape. The heating cooking according to any one of claims 1 to 3, wherein the heating means is formed in a flat plate shape, and is disposed so that a wide surface faces a placement position of the cooking object. vessel. 6. The cooking device according to claim 5 , wherein at least a surface on the side where the cooking object is placed is formed by a plurality of flat surfaces or curved surfaces among the surfaces of the heating means. The heating cooking according to any one of claims 4 to 6 , wherein a plurality of irregularities are formed on at least a surface of the heating unit on the side where the cooking object is placed. vessel. A plurality of heating means,
At least some of said plurality of heating means, said wide surface orientation relative placement position of the food is any one of claims 5-7, characterized in that different from other of said heating means 1 The heating cooker according to item. The cooking chamber, the inner wall in the vicinity position of at least the heating means, any one of the electrically insulating material or Claim 1-8, characterized in that it is formed of a material having an electrically insulating coating, The heating cooker according to item. The cooking device according to any one of claims 1 to 9 , wherein a protective means is provided at least at a part of the periphery of the heating means. 11. The cooking device according to claim 10 , wherein the protection means is formed so as to be able to transmit far infrared rays radiated from the heating means, and covers at least a part of the periphery of the heating means. The cooking device according to claim 10 or 11 , wherein the protection means is made of an electrically insulating material or has an electrically insulating film formed on a surface thereof. The cooking device according to claim 9 or 12, wherein the electrically insulating material or the electrically insulating film is formed of a far-infrared radiator or a far-infrared reflector. A holding member for fixing the protection means to the cooking chamber;
The cooking device according to any one of claims 10 to 13 , wherein the holding member has electrical insulation. The cooking device according to claim 14 , wherein the support member also functions as the holding member of the protection means. 16. The connection unit according to claim 1, wherein a convex portion is formed on a contact surface with the heating unit, and the contact unit is fixed so that pressure is applied to a contact portion between the convex unit and the heating unit . The cooking device according to any one of the above. The cooking device according to any one of claims 1 to 16 , wherein metal particles are interposed between a contact surface of the connecting means with the heating means and the heating means. The contact surface is melted by Joule heat generated by a current flowing between the contact surface of the connection unit with the heating unit and the heating unit, and the connection unit and the heating unit are connected. The cooking device according to any one of claims 1 to 17 . The cooking device according to any one of claims 1 to 18 , wherein the connection unit, the connection line, and the heating unit are supported by the support member so as to be movable within a predetermined range. The cooking device according to any one of claims 10 to 19 , wherein at least a part of the protection means is formed by an inner wall of the cooking chamber. The heating means is disposed near the inner wall of the cooking chamber,
21. The cooking device according to claim 20 , wherein an inner wall of the cooking chamber is formed so as to protrude around the heating unit, and forms a part of the protection unit. Temperature detecting means for detecting the temperature of the heating means,
The cooking device according to any one of claims 1 to 21 , wherein energization of the heating means is controlled so that a temperature of the heating means is 500 ° C or lower. A breakage / breakage detection means for detecting at least one of breakage and breakage of the heating means;
The cooking device according to any one of claims 1 to 22 , wherein when the heating means is broken or disconnected, the heating means is not energized. A door that opens and closes the opening of the cooking chamber;
Detecting means for detecting an open state and a closed state of the door;
The cooking device according to any one of claims 1 to 23 , wherein the heating means is not energized when the door is open. A catalyst body that is disposed in an exhaust air passage that exhausts the air in the cooking chamber and decomposes at least a part of the odor component;
The cooking device according to any one of claims 1 to 24 , wherein an exhaust port of the exhaust air passage is provided in the vicinity of the heating means.

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