JP2010033885A - Inductive-heating cooking apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an inductive-heating cooking apparatus which sets its lift suppressing plate in it easily and suppresses the temperature rise of its lift suppressing plate. <P>SOLUTION: The cooking apparatus includes a body case 2, a top plate 21 for covering the upper portion of the body case 2, an inductive-heating coil disposed under the top plate 21, a lift suppressing plate 15 interposed between the top plate 21 and the inductive-heating coil and formed out of a conductor, a holding means for holding at least the inductive-heating coil, and a blower 57 for feeding a cooling wind to the inside of the body case 2. The lift suppressing plate 15 is positioned in a predetermined position by the holding means, and a first gap is formed in at least one of the space between the inductive-heating coil and the lift suppressing plate 15 and the space between the lift suppressing plate 15 and the top plate 21. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an induction heating cooking apparatus provided with a buoyancy suppression plate.

  Conventional heating cooking apparatuses include an electromagnetic cooking apparatus that heats the upper surface of one main body (housing) with one or a plurality of electromagnetic induction heating sources, and a radiation type such as an electric heater in addition to the electromagnetic induction heating source. As a composite cooking apparatus of a type that can be heated by a heating source, for example, “a case with an intake port and an exhaust port disposed on the upper surface, a heating coil, and a circuit board including an electric circuit that drives the heating coil; A cooling fan, a motor for driving the cooling fan, and a fan cover surrounding the cooling fan, the cooling fan unit fixed to the outer case, and the circuit board is supported and placed on the bottom surface of the outer case And an induction heating cooker having a circuit support base, and so on have been proposed (see, for example, Patent Document 1).

There is also provided a cooking apparatus capable of inductively heating not only a pan (heated object N) made of a magnetic material such as iron or stainless steel but also a heated object N made of aluminum or copper (including these alloys). Yes. Such a cooking device may be referred to as an “all metal compatible” cooking device.
In the case of such an all-metal cooking device, the object N to be heated is lifted by a magnetic repulsive force generated between the IH heating coil (induction heating coil), and a buoyancy suppression plate ( For example, “the conductor is provided between the heating coil and the object to be heated and opposed to the heating coil, and has an opening facing the center of the heating coil and the opening. Formed in a part and isolated from the outer peripheral part, and has a groove part that restricts heat generation by an induced current generated around the opening part, and has a buoyancy imparted to the object to be heated by a magnetic field generated by the heating coil. There has been proposed an induction heating apparatus including an electrical conductor to be reduced ... "(see, for example, Patent Document 2).

Japanese Patent No. 4002289 (Claim 1) Japanese Patent No. 3938197 (Claim 1)

  However, the conventional induction heating cooking apparatus employs a method in which the buoyancy suppression plate is fixed by a fixing means such as a screw or a rivet so as to cover the upper side of the induction heating coil. For this reason, there existed a problem that installation of a buoyancy suppression board could not be performed easily.

  The buoyancy suppression plate generates heat by generating a circulating current by the magnetic flux from the coil. Further, the temperature rises upon receiving radiant heat from the heated object that has become high temperature. For this reason, there existed a problem that the temperature of a buoyancy suppression board needed to be cooled effectively.

  The present invention has been made to solve the above-described problems, and provides an induction heating cooking apparatus that can easily install a buoyancy suppression plate and suppress an increase in temperature of the buoyancy suppression plate. Objective.

  An induction heating cooking apparatus according to the present invention is provided between a main body, a top plate covering an upper portion of the main body, an induction heating coil disposed below the top plate, and the top plate and the induction heating coil. A buoyancy suppression plate formed of a conductor, holding means for holding at least the induction heating coil, and blowing means for supplying cooling air to the inside of the main body. The buoyancy suppression plate is predetermined by the holding means. The first gap is formed between at least one of the induction heating coil and the buoyancy suppression plate and between the buoyancy suppression plate and the top plate.

  In the present invention, the buoyancy suppression plate is positioned at a predetermined position by the holding means, and a first gap is formed between at least one of the induction heating coil and the buoyancy suppression plate and between the buoyancy suppression plate and the top plate. Therefore, the buoyancy suppression plate can be easily installed, and the temperature rise of the buoyancy suppression plate can be suppressed.

Embodiment 1 FIG.
The induction heating cooking apparatus (hereinafter also referred to as “cooking apparatus”) in the first embodiment is a stationary type installed on kitchen furniture (not shown) such as a kitchen sink, and a kitchen. The present invention relates to one or both types of what is called a built-in type or a built-in type that is used by being incorporated in an installation space formed in furniture.

FIGS. 1-17 shows the induction heating cooking apparatus which concerns on Embodiment 1 of this invention, Comprising: The induction heating cooking apparatus called a built-in type or a built-in type is shown.
1 is an exploded perspective view showing an induction heating cooking apparatus main body according to Embodiment 1. FIG.
FIG. 2 is a perspective view showing the entire top plate and the main body according to the first embodiment.
FIG. 3 is a plan view of a part of the front of the main body according to the first embodiment.
FIG. 4 is a plan view of the entire main body according to the first embodiment.
FIG. 5 is a longitudinal cross-sectional view at the right half side position of the main body according to the first embodiment.
FIG. 6 is a longitudinal sectional view showing the induction heating coil portion according to the first embodiment.
FIG. 7 is a perspective view of an essential part of the right-side induction heating coil portion according to Embodiment 1 which is vertically broken.
FIG. 8 is a perspective view of a main part of the left induction heating coil portion according to the first embodiment, which is vertically broken.
FIG. 9 is a longitudinal cross-sectional view at the left half side position of the main body according to the first embodiment.
FIG. 10 is a configuration diagram of a control circuit according to the first embodiment.
FIG. 11 is a partial cross-sectional explanatory view showing the middle of the installation process of the cooking apparatus according to the first embodiment.
FIG. 12 is an exploded perspective view showing a housing portion and a top plate portion of the main body case according to the first embodiment.
FIG. 13 is an exploded perspective view showing a housing portion of the main body case according to the first embodiment.
FIG. 14 is a longitudinal sectional view showing the upper surface operation unit and the end portions of the top plate unit according to the first embodiment.
FIG. 15 is a partially omitted perspective view for explaining a mounting state of the board on which the pressing operation type switch of the upper surface operation unit and the electronic component element 252 according to the first embodiment are mounted.
FIG. 16 is a longitudinal sectional view showing an end portion of the top plate portion according to the first embodiment.
FIG. 17 is a plan view of the buoyancy suppression plate according to the first embodiment.
In the drawings, the same or corresponding parts are denoted by the same reference numerals.

(Induction heating cooking device body)
The induction heating cooking apparatus includes one rectangular main body A. The main body part A normally heats the top plate part B constituting the upper surface of the main body part A, the casing part C constituting the periphery (outer shell) other than the upper surface of the main body part A, pots, foods, etc. with electric energy or the like. Heating means D, operating means E operated by a user, control means F for controlling the heating means in response to a signal from the operating means, and display means G for displaying the operating conditions of the heating means. . Further, as a part of the heating means D, an electric heating means called a grill box or a roaster is provided.

  The operating conditions of the heating means refer to electrical and physical conditions for heating, and collectively refers to energization time, energization amount, heating temperature, energization pattern (continuous energization, intermittent energization, etc.) and the like.

  Display means that the user is informed of operating conditions and related information that is useful for cooking (changes in characters, symbols, illustrations, colors, presence / absence of light emission, light emission brightness, etc.) Including the target one, this is simply the operation of visually informing the user of “Cooking related information”.

  Unless otherwise specified, the display means includes a liquid crystal (LCD), various light emitting elements (an example of a semiconductor light emitting element is LED (Light Emitting Diode), LD (Laser Diode)), organic Electroluminescence (EL) element or the like. For this reason, the meaning of the display means includes a display screen such as a liquid crystal screen or an EL screen.

  The notification is an operation for notifying the user of the operation conditions of the control means and cooking-related information by display or electrical sound (refers to electrically generated or synthesized sound).

  Unless otherwise specified, the notification means includes notification means using audible sounds such as a buzzer and a speaker, and notification means using characters, symbols, illustrations, or visible light.

(Housing C)
1-17, A is a main-body part with which the whole upper surface was covered with the top-plate part B mentioned later. The main body A is formed in a substantially square or rectangular shape with a predetermined size that fits the space and a size that covers the installation opening K1 (see FIG. 11) formed in the kitchen furniture KT such as a sink. Yes.

  Reference numeral 2 denotes a main body case that forms the outer surface of the casing C. As shown in FIG. 13 (a), the main body case 2 includes a body portion 2A formed by bending a single flat metal plate with a press molding machine a plurality of times, and an end at a front position of the body portion 2A. It consists of a front flange plate 2B made of a metal plate joined together by fixing means SC1 such as welding, rivets or screws. As shown in FIG. 13B, in a state where the front flange plate 2B and the body portion 2A are coupled by the fixing means SC1, a box shape is formed in which the upper surface is opened and substantially the entire front surface (front surface) is opened. .

  The main body case 2 has flanges formed by integrally bending outwardly in an L shape at three locations, the rear end portion, the right end portion, and the left end portion of the upper surface opening 2SP. 3B is a rear flange, 3L is a left flange, 3R is a right flange, and these three flanges 3B, 3R, and 3L are placed on the upper surface of the installation parts 142A and 142B (see FIG. 9) of the kitchen furniture KT for cooking. It is designed to support the load of the device.

  2T is a flange integrally formed by bending the upper edge portion of the front flange plate 2B forward in an L shape. The front end portion of the flange 2T has a bent portion 2T1 bent upward at a right angle.

  As shown in FIG. 11, the lower surface of the flange 2T of the front flange plate 2B is placed on the upper surface of the installation portion 142A (see FIGS. 9, 11, and 14) in front of the installation opening K1 of the kitchen furniture KT. It is designed to support the load of the cooking device. When the cooking device is accommodated in the installation space KTS of the kitchen furniture KT, the front portion of the cooking device is exposed from the opening KTK formed in front of the kitchen furniture KT, and the front side of the kitchen furniture KT is exposed. Therefore, the front operation unit 60 of the cooking apparatus can be operated.

  In FIG. 13, 2S is an inclined surface connecting the back surface and the bottom surface of the body portion 2A. As shown in FIG. 11, when the main body case 2 is installed by fitting the cooking device into the kitchen furniture KT, the inclined surface 2S is cut so as not to interfere with the installation portion 142B behind the kitchen furniture KT. That is, when this type of cooking apparatus is installed by being fitted into the kitchen furniture KT, the cooking apparatus is tilted so that the front side of the main body A of the cooking apparatus is down, and in this state, the installation opening of the kitchen furniture KT from the front side to the front side. Drop into K1. After that, the rear side is dropped into the installation port K1 so as to draw an arc (such an installation method is described in detail, for example, in JP-A-11-121155). For such an installation method, the front flange plate 2B is connected to the installation part 142A (see FIGS. 9 and 14) in front of the installation opening K1 of the kitchen furniture KT when the cooking apparatus is installed in the kitchen furniture KT. The size is such that a sufficient space SP is secured between them.

Inside the main body case 2 are a right IH heating source 6R and a left IH heating source that generate electromagnetic energy or heat energy for heating an object N to be heated such as a metal pan placed on a top plate 21 described later. 6L and the central heating source 7, the control means F for controlling the cooking conditions of the right IH heating source 6R, the left IH heating source 6L and the central heating source 7, and the cooking conditions input to the control means F The operation means E to be described later and the display means G for displaying information on the operating conditions of the heating means input by the operation means E are provided.
Hereinafter, each will be described in detail.

  As shown in FIG. 1, the interior of the housing C is roughly divided into an electrical component chamber 8, a roaster heating chamber 9, an upper component chamber 10, an intake chamber 11, and an exhaust chamber 12. Note that the rooms are not completely isolated from each other. For example, the electrical component chamber 8 communicates with the intake chamber 11 and the exhaust chamber 12.

  The roaster heating chamber 9 is a substantially independent sealed space when the door 13 to be described later is closed. However, the roaster heating chamber 9 communicates with an external space of the casing C, that is, an indoor space such as a kitchen via the exhaust duct 14. ing.

(Top plate part B)
As shown in FIG. 2, the top plate portion B includes an upper frame 20 (also referred to as “frame”) and a top plate 21 (also referred to as “upper plate”, “top glass”, or “top plate”). It consists of two large parts.
The entire upper frame 20 is formed in a frame shape from a metal plate such as a nonmagnetic stainless steel plate or an aluminum plate, and has a size that closes the upper surface opening 2SP of the main body case 2.

The top plate 21 is placed so as to cover a large opening 20 </ b> A provided in the center of the upper frame 20. The entire top plate 21 is made of a translucent material that transmits infrared rays, such as heat-resistant tempered glass or crystallized glass, and is formed in a rectangular or square shape according to the shape of the opening 20A of the upper frame 20.
Furthermore, the top plate 21 is fixed in a watertight state by interposing a rubber packing or a sealing material PK (see FIGS. 14 and 16) between the opening 20A of the upper frame 20 or the upper surface as shown in FIG. Yes. Therefore, water droplets or the like from the upper surface of the top plate 21 are prevented from entering the inside of the main body portion A through the gap between the upper frame 20 and the top plate 21.

In FIG. 12, 20B is a right vent hole that is simultaneously punched and formed by a press machine when the upper frame 20 is formed, 20C is a central vent hole that is also punched and formed when the upper frame 20 is formed, and 20D is also when the upper frame 20 is formed. This is a punched left vent.
FR and FL are a pair of left and right protective members, and are entirely formed of a metal such as aluminum. As shown in FIG. The surface is L-shaped. That is, the pair of end surface protection members have the same vertical cross-sectional shape and planar shape, and are arranged so as to face each other from the left and right sides of the top plate 21.

FIG. 16 shows the longitudinal sectional shape of the protection members FR and FL. The protection members FR and FL are respectively provided with a protection portion FP facing the left and right end surfaces of the top plate 21 with a minute gap S1 of about 1 mm or less, a base portion FB formed continuously thereto, and the base portion FB. A presser portion FT that rises by a predetermined dimension X on the top plate 21 side and a fixed end FF that is on the opposite side of the base portion FB across the presser portion FT are integrally formed.
It is desirable that the minute gap S1 is ideally close to zero. Therefore, in the actual assembly operation process, it is desirable to fix the protection members FR and FL so that the protection members FR and FL are pressed against the left and right end surfaces of the top plate 21.
In other words, the protective part FP is formed to rise from a horizontally extending base part FB at a right angle (vertical), and the protective part FP is such that a hard object such as a pan collides with the end surface of the top plate 21 from the outside. Is to prevent. Thereby, the crack of the end surface part of the top plate 21 which is relatively weak against an impact when a hard object hits from the outside is prevented.

As shown in FIG. 16, the left and right ends of the upper frame 20 are fixed to bend downward and extend laterally by a dimension Y that is equal to or slightly larger than the rising dimension X of the base FB of the protective members FR and FL. Part 20F is formed. 20W is the bent portion.
S2 is a space formed by the lower surfaces of the left and right end portions of the top plate 21 and the upper surfaces of the protection members FR and FL, which are filled with a heat-resistant adhesive such as a silicone rubber.

S3 is a space surrounded by the lower surface of the left and right ends of the top plate 21, the left and right ends of the upper frame 20, and the upper surfaces of the protective members FR and FL. The adhesive material BB is filled to improve the fixation and adhesion between the three.
As described above, in the state where the top plate 21, the upper frame 20, and the protection members FR and FL are fixed by the adhesive BB, the lower surface of the top plate 21 is in contact with the pressing portion FT of the protection members FR and FL. Face each other with a slight gap. This is because, as described above, the fixing portion 20F is formed that is bent downward and extends laterally by a dimension Y that is equal to or slightly larger than the rising dimension X of the base FB of the protective members FR and FL. is there.

  Considering that the edge portion 20EG (corner portion) of the end portion (right end portion in FIG. 16) of the fixing portion 20F does not protrude downward from the base portion FB (the thickness of the upper frame 20 and the plates of the protective members FR and FL) Ideally, the dimensional relationship is X ≧ Y (when the thicknesses are the same). By doing so, the lower surface of the fixing portion 20F and the lower surface of the base portion FB are aligned on the same horizontal plane (when X = Y), or the lower surface of the base portion FB slightly protrudes from the lower surface of the fixing portion 20F (when X> Y) ).

  In the fixing operation of the top plate 21, the upper frame 20, and the protective members FR and FL, a jig or the like is used to ensure mutual alignment. Also, the assembly work is reversed upside down from the state shown in FIG. 16, the top plate 21 is placed at the lowest position, and the protection members FR and FL are placed on the left and right ends thereof. Then, the adhesive material BB is applied to the portion that becomes the space S3, and the upper frame 20 is placed on the upper surface (becomes the lower surface after assembly) of the top plate 21 before the adhesive material BB is cured. In this way, the top frame 20 is fixed by the adhesive BB in a state where the upper frame 20 is in close contact with the upper surface (the lower surface in FIG. 16) of the top plate 21.

  In FIG. 12, 20E is a through hole formed in the upper frame 20. The through-hole 20E is provided with various switch operation keys (for example, thermal power keys 74, 75, 76, roaster heating, etc.) of a right heating power setting operation unit 70, a central operation unit 72, and a left heating power setting operation unit 71 of the upper surface operation unit 61 described later. This is for passing push buttons (for example, 15 pieces) for operating the operation switches for starting energization of the heaters 22 and 23 in the chamber 9 (see FIG. 14). In FIG. 12, only ten through holes 20E are drawn.

In the actual cooking stage, the top plate 21 receives heat from a heated object N such as a pan heated to a high temperature by the right IH heating source 6R and the left IH heating source 6L, which will be described in detail later, and reaches 300 degrees or more. May be. Furthermore, when the central heating source 7 which is a radiation type electric heater described later is provided below the top plate 21, the top plate 21 is directly heated to a high temperature by the heat from the central heating source 7, The temperature can be as high as 400 degrees.
Therefore, when the protective members FR and FL are integrally formed in a frame shape (also referred to as a “R” shape) so as to surround the entire periphery of the top plate 21, the expansion rate due to the temperature rise of the glass top plate 21 and the metal Since the expansion rates of the protective members FR, FL differ from each other, a large variation occurs in the minute gap S1 between the protective members FR, FL and the left and right end surfaces of the top plate 21.

  On the other hand, when the protection members FR and FL are separately configured so as to sandwich the top plate 21 from both sides as described above, the fixing positions of the upper frame 20 and the protection members FR and FL are adjusted. It can cope with a change in dimensions due to thermal expansion as described above. That is, the fixing positions of the protection members FR and FL with respect to the upper frame 20 may be changed so that the minute gap S1 between the protection portions FP of the protection members FR and FL and the left and right end surfaces of the top plate 21 is within a predetermined size range. . By doing so, various problems due to an unnecessarily large gap between the left and right end faces of the top plate 21 (the gap becomes large and impairs the design, and the cooking to the gap becomes large. Intrusion of the generated liquid or accumulation of fine dust may impair the aesthetics).

  In FIG. 12, reference numeral 121 denotes a rear frame that is formed entirely of a thin metal plate. The rear frame 121 is fixed to the upper frame 20 by fixing means SC4 such as screws. Reference numeral 123 denotes a front frame body formed entirely of a thin metal plate. The front frame 123 is fixed to the upper frame 20 by fixing means SC3 such as screws. The width dimensions of the front frame body 123 and the rear frame body 121 are the same dimensions as the width of the main body A. In a state where the front frame body 123 and the rear frame body 121 are fixed to the upper frame 20, the front edge and the rear edge of the top plate 21 are covered from above with a predetermined width. That is, the left and right side edges of the top plate 21 are covered with the protection members FR and FL, and the front and rear edges are covered with the front frame body 123 and the rear frame body 121, respectively.

  In FIG. 12, 123 </ b> A is a through hole formed in the front frame body 123. This through-hole 123A is provided with various switch operation keys (for example, thermal power keys 74, 75, 76, and so on) of the right heating power setting operation unit 70, the central operation unit 72, and the left heating power setting operation unit 71 of the upper surface operation unit 61 described later. This is for passing push buttons 254A (for example, 15 pieces) for operating the operation switches for starting energization of the heaters 22 and 23 of the roaster heating chamber 9 (see FIG. 14). The through hole 123A is formed at a position corresponding to the through hole 20E of the upper frame 20 described above. In FIG. 12, only ten through holes 123A are drawn.

  Although not shown, the upper frame 20 is fixed to the main body case 2 with a fixing tool such as a screw, and the fixing means SC3 and SC4 described above may be used as the fixing tool.

  In FIG. 2 again, circular guide marks 6RM, 6LM, and 7M indicating the approximate positions of the right IH heating source 6R, the left IH heating source 6L, and the central heating source 7 to be described later are printed on the upper surface of the top plate 21, respectively. It is displayed by the method.

(Heating means D)
As shown in FIGS. 1 and 2, in the induction heating cooking apparatus according to the first embodiment, the right IH heating source 6R disposed in the upper right position of the main body A as the heating means, the upper left position of the main body A. Left IH heating source 6L, a central heating source 7 arranged near the rear of the upper center of the main body A, and heaters 22 and 23 which are a pair of upper and lower radiant electric heating sources for the roaster (FIG. 9). See). These heating sources are configured such that energization is controlled by the control means F independently of each other. Details of the control will be described later.

(Right IH heating source 6R)
As shown in FIGS. 1 and 2, the right IH heating source 6 </ b> R is installed inside the upper part chamber 10 that is partitioned and formed inside the main body case 2. The right IH heating coil 6RC is arranged on the lower surface side of the right side position of the top plate 21. The upper end portion of the right IH heating coil 6RC is close to the lower surface of the top plate 21 with a small gap, and serves as an electromagnetic induction heating source. In the first embodiment, for example, a device having a maximum power consumption (maximum heating power) of 3 KW is used.
The right IH heating coil 6RC is formed by winding a bundle of about 30 thin wires of about 0.1 mm in a spiral shape while winding one or more bundles (hereinafter referred to as a collecting wire 35) to form a circular outer shape. Thus, it is finally formed into a disk shape (see FIG. 7). The diameter (maximum outer diameter dimension) of the right IH heating coil 6RC is about 180 mm.
The right IH heating coil 6RC corresponds to the induction heating coil in the present invention.

  The position of the guide mark 6RM which is a circle (broken line in FIG. 2) displayed on the top plate 21 does not completely coincide with the outermost peripheral position of the right IH heating coil 6RC of the right IH heating source 6R. The guide mark 6RM indicates a proper induction heating area.

  The right IH heating coil 6RC may be divided into a plurality of parts so as to be energized independently. For example, an IH heating coil is wound inside in a spiral shape, and another large-diameter spiral IH heating coil is placed on the outer peripheral side of the IH heating coil on the same concentric circle and substantially on the same plane. The article to be heated N may be heated in three energization patterns: energization of the heating coil, energization of the outer IH heating coil, and energization of the inner and outer IH heating coils. Thus, from at least one of the output level, duty ratio, and output time interval of the high-frequency power flowing through the two IH heating coils, or a combination thereof, it is efficient from a small pan to a large (large diameter) pan. You may make it heat (Japanese Patent No. 2978069 is known as a typical technique using such a plurality of coils that can be independently energized).

As shown in FIGS. 6 and 7, the right IH heating source 6 </ b> R has a right IH heating coil 6 </ b> RC mounted on a disc-shaped base 24. An annular protrusion 26 that protrudes upward and downward in a cylindrical shape is integrally formed at the center of the base 24. The base 24 is entirely formed of a nonmagnetic material such as a heat resistant plastic.
The base 24 corresponds to the holding means in the present invention.
Reference numeral 25 denotes support portions that are formed at four positions around the base 24 at regular intervals and project in a tongue shape. Reference numeral 27 denotes a partition plate that partitions the inside of the main body A vertically. Reference numeral 28 denotes a support column which is located below the support portion 25 and stands from the partition plate 27. Reference numeral 29 denotes a coil spring placed so as to surround the column 28. The coil spring 29 is compressed and installed between the support portion 25 and the partition plate 27 so as to always push up the support portion 25 from below.

  A plurality of air holes 30 are formed at equal intervals on the ceiling surface of the annular protrusion 26. Reference numeral 31 </ b> R denotes an infrared temperature detecting element installed inside the protrusion 26. The temperature detection element 31 </ b> R faces the light receiving part 33 </ b> R at a position directly above the opening 32 formed at the center of the ceiling surface of the protrusion 26. Reference numeral 34R denotes a lead wire for the temperature detection element 31R.

  The infrared temperature detection element 31 </ b> R (hereinafter also referred to as “infrared sensor”) is configured by a photodiode or the like that can measure the temperature by detecting the amount of infrared rays radiated from a heated object N such as a pan. The temperature detection element 31R may be a heat transfer type detection element, for example, a thermistor type temperature sensor.

When the infrared temperature sensor is provided as shown in FIG. 6, the temperature of the object to be heated N can be detected at a position corresponding to the center of the bottom of the object to be heated N. That is, there is Stefan-Boltzmann's law that the infrared energy radiated from the heated object N is proportional to the fourth power of the absolute temperature of the heated object N, and the infrared energy radiated at an accelerated rate as the temperature increases. Will increase. Therefore, this infrared sensor is one that receives the emitted infrared light and uses a voltage proportional to the energy of the infrared light as an output.
In actual use of the infrared sensor, a band pass filter (band filter) that transmits only a wavelength in a predetermined band in order to cut off infrared rays emitted from the top plate 21 below the object N to be heated is an infrared ray. It is installed in front of the light receiving part (light receiving part 33R) so as to efficiently capture the infrared rays from the heated object N. However, since the received light energy is still weak, the amplifying means (amplifier) amplifies the received light energy and It is devised to obtain a voltage output according to the amount of energy.

  The rapid detection of the infrared rays emitted from the heated object N according to the temperature from the lower side of the top plate 21 by the infrared sensor is disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-95144 (Japanese Patent No. 3975865), This is known from Japanese Unexamined Patent Application Publication No. 2006-310115 and Japanese Patent Application Laid-Open No. 2007-18787.

  When the infrared temperature detection element 31R is used, it is possible to collect the infrared rays radiated from the object N to be heated and to receive the temperature in real time (with little time difference) and detect the temperature from the amount of the infrared rays (thermistor). Better than formula). This infrared sensor can be used regardless of whether the temperature of the top plate 21 made of heat-resistant glass or ceramics in front of the object to be heated N and the temperature of the object to be heated N are the same. The temperature of the article to be heated N can be detected. That is, the infrared rays radiated from the heated object N are devised so that they are not absorbed or blocked by the top plate 21. For example, the top plate 21 is selected from a material that transmits infrared rays having a wavelength range of 4.0 μm or 2.5 μm or less, while the temperature detecting element 31R transmits infrared rays having a wavelength range of 4.0 μm or 2.5 μm or less. What to detect is selected.

  On the other hand, when the temperature detection element 31R is of a heat transfer type such as a thermistor, it is inferior in capturing a rapid temperature change in real time as compared with the above-described infrared sensor, but from the top plate 21 or the object N to be heated. The temperature of the bottom part of the to-be-heated material N and the top plate 21 just under it can be detected reliably. Further, the temperature of the top plate 21 can be detected even when there is no object to be heated N. When the temperature detection element 31R is a heat transfer type such as a thermistor, the light receiving portion 33R is directly in contact with the lower surface of the top plate 21, or a member such as a heat transfer resin is interposed so that the top plate 21 itself The temperature may be grasped as accurately as possible. This is because if there is a gap between the light receiving portion 33R and the lower surface of the top plate 21, a delay in temperature transmission occurs.

  In addition, when the temperature detection element 31R detects the temperature of the top plate 21 or the object N to be heated, the temperature detection element 31R is specific to the object of temperature measurement regardless of whether it is a heat transfer type such as a thermistor or an infrared type. It is actually difficult to accurately detect only the temperature of only the calculated value (theoretical value), so the temperature of the bottom center of the object to be heated N and the temperature of its outer peripheral surface (with the object to be heated N) are placed with a small gap. Indirect detection is performed, and the difference between the temperature indicated by the measurement data at that time and the actual temperature obtained from the experimental result is verified, and the detected temperature of the temperature detection element 31 is the actual value of the top plate 21 or the heated object N. You may make it adjust beforehand so that it may become near temperature.

  Moreover, you may use as a sensor for determining whether the to-be-heated material N is mounted on the said top plate 21 using the temperature detection element 31R.

  In FIG. 6, 15 is a buoyancy suppression plate. As will be described later, the buoyancy suppression plate 15 allows a current having a high frequency of about 60 to 70 KHz to flow through the right IH heating coil 6RC and / or the left IH heating coil 6LC (hereinafter also referred to as “heating coils 6RC, 6LC”). Then, the magnetic repulsive force between the heated object N and the heating coils 6RC, 6LC increases, and a large force acts on the heated object N in the direction away from the heating coils 6RC, 6LC, so that the heated object N The “lifting phenomenon” (also referred to as “lifting phenomenon”) may occur and is intended to suppress it. The buoyancy suppression plate 15 is also referred to as a “lifting suppression plate” or “electric conductor”.

As shown in FIGS. 6 and 17, the buoyancy suppression plate 15 is formed in a semicircular flat plate shape that covers the heating coils 6RC and 6LC from above. The buoyancy suppression plate 15 is formed of a conductor having high conductivity (high electrical conductivity) such as aluminum, aluminum alloy, copper, copper alloy, carbon, etc. In the first embodiment, the plate thickness is 1 mm or less. The outer diameter is about 185 mm to 190 mm.
And as shown in FIG. 6, the buoyancy suppression board 15 is installed in the close contact state on the lower surface of the top plate 21 so as to be interposed between the heating coils 6RC, 6LC and the object N to be heated. This close contact is because the support portion 25 on which the heating coils 6RC and 6LC are placed is always pushed up by the coil spring 29 from below.

As shown in FIG. 17, the buoyancy suppression plate 15 is configured such that a right half portion 15 </ b> A and a left half portion 15 </ b> B that are symmetrical to each other face each other with a facing interval 15 </ b> S of about 5 mm to 10 mm. An opening 15C having a diameter of about 50 to 60 mm is formed between the right half 15A and the left half 15B. Eight slits 15 </ b> D are formed deeply and thinly from the periphery of the opening 15 </ b> C (width 0.5 mm to 2 mm and length 30 mm). The slits 15 </ b> D are radial from the center portion 15 </ b> X of the buoyancy suppression plate 15.
Reference numeral 15H denotes a wide base where no slit 15D is formed. Reference numeral 15G denotes a comb-like portion that protrudes from the base portion 15H toward the center portion 15X.

15E1 to 15E11 are eleven through holes provided in the base portion 15H so as to be arranged at a predetermined interval, and have a diameter of about 2 mm to 5 mm. 15F is a through-hole provided in the outer position of the base 15H of each of the right half 15A and the left half 15B.
Among the 11 through holes 15E1 to 15E11, the through hole 15E2 and the through hole 15E10 formed at a predetermined interval, and the through hole 15F provided at the outer position of the base portion 15H (hereinafter referred to as “through holes 15E2, 15F, 15E10”) In the three through-holes of ..), the tops of the protrusions 38 on the outer peripheral ends of the ribs 37 to be described later are inserted from below.
That is, the right half portion 15A and the left half portion 15B are placed on the projections 38 that are located above the heating coils 6RC and 6LC and slightly protrude toward the top plate 21 in the process of assembling. The portions 15E2, 15F and 15E10 can be positioned. Thereafter, with the top plate 21 covered from above, the upper surfaces of the right half 15A and the left half 15B are in close contact with the lower surface thereof.

  In the state where the projection 38 and the through holes 15E2, 15F, and 15E10 are matched, an adhesive material, for example, a heat-resistant silicone rubber-based adhesive material is poured from the through hole, and the projection 38 and the through holes 15E2, 15F, 15E10 may be fixed. Alternatively, when the ribs 37 and the protrusions 38 are formed by pouring the heat-resistant / thermosetting adhesive 36 on the upper surface of the heating coils 6RC, 6LC, the buoyancy suppression plate 15 is pressed from above to heat the heating coils 6RC, 6LC. The buoyancy suppression plate 15 is not necessarily fixed to the IH heating coils 6RC, 6LC side with screws, rivets or the like.

When electric power is applied to the heating coils 6RC and 6LC, the magnetic flux from the heating coils 6RC and 6LC is linked to the buoyancy suppression plate 15, and an induced current is generated in the buoyancy suppression plate 15. Adjacent eddy currents cancel each other because the direction of flow at the contact portion is reversed, and the induced current becomes a circular current flowing through the base portion 15H as indicated by an arrow 15Y shown in FIG.
Similarly, the circular current 15Z flows in the comb-shaped portion 15G. However, because of the slit 15D, the width of the comb-shaped portion 15G is narrow and the amount of eddy current induced is small because the interlinking magnetic flux is small. The amount of heat generated by is also small. Thus, the comb-shaped portion 15G has an effect of suppressing the amount of heat generated at the opening portion 15C side end portions of the right half portion 15A and the left half portion 15B.
The magnetic flux from the heating coils 6RC, 6LC is collected in the direction of the center of the heating coils 6RC, 6LC by the elongated teeth 15T having a width of about 1 mm to 5 mm existing in each comb-shaped portion 15G. Since the degree of magnetic coupling between the object to be heated N and the heating coils 6RC and 6LC is increased, there is a secondary effect that the equivalent series resistance is increased and the buoyancy suppression effect is increased.

  In addition, when the shape of the heating coils 6RC and 6LC is circular, it is desirable that the buoyancy suppression plate 15 has a circular shape substantially coincident with the center of the coil. This is because the upper portions of the heating coils 6RC and 6LC can be covered with good balance, and the buoyancy generated in the heated object N can be easily made uniform. Further, the buoyancy restraining plate 15 does not have to be in two or more portions like the right half portion 15A and the left half portion 15B. That is, the whole may be formed by a single sheet, and in that case, it is not necessary to form a slit portion like the above-described facing interval 15S. If the whole is formed as one, there is an advantage that the equivalent series resistance is increased and the buoyancy suppression effect is increased by increasing the area, but on the other hand, the circulating current 15Y circulates over the entire buoyancy suppression plate 15, so that the current amount There is a possibility that it becomes a disadvantageous effect that the amount of heat generated by the buoyancy suppression plate 15 itself increases.

  In addition, the technique itself which provides a cyclic | annular buoyancy suppression board is specifically disclosed by Unexamined-Japanese-Patent No. 7-249480, and the patent 3938197, for example.

  6 and 7, the surface of the collecting wire 35 of the right IH heating coil 6RC is coated with an insulating material, for example, a fluorine resin. For example, it is covered with a fluororesin tube. The assembly line 35 thus formed is wound around the annular protrusion 26 and stacked in a plurality of stages to form an annular shape. In the example shown in FIG. 7, they are stacked in five stages.

Further, a heat-resistant / thermosetting adhesive material 36, for example, an epoxy resin is infiltrated into the gaps between the accumulated wires 35, and the whole is integrally hardened.
Reference numeral 37 denotes a rib. The rib 37 is integrally formed with the adhesive 36 on the upper surface of the right IH heating coil 6RC. When the right IH heating coil 6RC is viewed from the upper surface, the ribs 37 are formed with eight or twelve ribs at substantially constant intervals so as to be radial with the protrusions 26 as the center. That is, each rib 37 extends so as to be substantially orthogonal to each set line 35.

Reference numeral 38 denotes a protrusion. The protrusions 38 are integrally formed on the outer peripheral end portion of the rib 37 every other or plural of the eight or twelve ribs 37.
The upper end portion of the protrusion 38 abuts the lower surface of the buoyancy suppression plate 15 below the top plate 21, so that the cooling air flows along the longitudinal direction of the rib 37 above the assembly line 35 of the right IH heating coil 6 RC. A path 39 is formed.
That is, the protrusion 38 of the rib 37 and the lower surface of the buoyancy suppression plate 15 come into contact, the buoyancy suppression plate 15 is positioned at a predetermined position, and a gap is formed between the right IH heating coil 6RC and the buoyancy suppression plate 15. It will be.
The cooling air passage 39 corresponds to the first gap in the present invention.

Since the cooling air passage 39 is formed radially around the protrusion 26, the cooling air (hereinafter referred to as "cooling air Y2") supplied to the vent hole 30 of the protrusion 26 as shown by an arrow Y2 in FIG. “) Flows radially through the vent hole 30 as indicated by the arrow Y1 shown in FIGS. 6 and 7 (hereinafter referred to as“ cooling air Y1 ”), the upper surface of the right IH heating coil 6RC, and the buoyancy suppression plate. 15 is cooled.
The height of the cooling air passage 39 may be several mm or less.

In FIGS. 6 and 7, reference numeral 41 denotes a cavity formed below the protrusion 26. The cavity 41 secures a space through which the cooling air Y2 flows around the temperature detection element 31R.
Reference numeral 42 denotes a magnetic flux leakage prevention material attached to the lower surface (back surface) of the right IH heating coil 6RC. The magnetic flux leakage preventing material 42 is made of a highly permeable material, for example, ferrite. The magnetic flux leakage prevention material 42 does not need to cover the entire lower surface of the right IH heating coil 6RC. A plurality may be provided at intervals. That is, a plurality of radials may be provided centering on the protrusion 26.

43 is a duct. The duct 43 has a length (horizontal width) that extends both below the base 24 of the right IH heating coil 6RC and below the base (not shown) of the left IH heating coil 6LC. The duct 43 is installed on the partition plate 27. That is, the duct 43 has a length close to the entire width of the upper part chamber 10.
The duct 43 is formed with a central vent 45 corresponding to the opening 44 formed in the partition plate 27 and a plurality of vents 46 around it, and cooling air introduced from the opening 44 is formed. Is distributed to a predetermined position of the right IH heating coil 6RC. Y3 indicates cooling air (hereinafter referred to as “cooling air Y3”) that flows through the vent 46 and flows under the right IH heating coil 6RC. The remaining cooling air introduced into the duct 43 from the opening 44 and blown out from the central vent 45 and the plurality of vents 46 is blown similarly below the left IH heating coil 6LC, and left The base (not shown) of the IH heating coil 6LC is cooled.

In this way, the cooling air passage 39 is formed radially around the protrusion 26 by the rib 37 integrally formed with the resin adhesive 36 on the upper surface of the right IH heating coil 6RC. The cooling air Y1 can be effectively flowed from the central portion of the cooling air passage 39 formed by the protrusions 38. With this cooling air Y1, the right IH heating coil 6RC can be cooled from above, and the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved.
Further, since the cooling air passage 39 is formed, the buoyancy suppression plate 15 can be cooled from below by the cooling air Y1, and the temperature rise of the buoyancy suppression plate 15 can be suppressed.
Moreover, since the cooling air Y3 can be flowed to the lower surface of the right IH heating coil 6RC, the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved.
Further, since the right half portion 15A and the left half portion 15B of the buoyancy suppression plate 15 are placed and positioned on the protrusions 38 of the rib 37, the buoyancy suppression plate 15 can be easily installed.
Further, since the rib 37 and the protrusion 38 are formed by pouring the heat-resistant / thermosetting adhesive material 36 on the upper surface of the right IH heating coil 6RC, the entire right IH heating coil 6RC is firmly integrated, and predetermined This has the effect of maintaining the circular shape.

(Left IH heating source 6L)
As shown in FIG. 1, the left IH heating source 6L is installed at a position contrasting with the right IH heating source 6R across the center of the left and right sides of the main body A, and has substantially the same configuration as the right IH heating source 6R. It has become.
That is, as shown in FIG. 8, the temperature detection element 31L installed inside the protrusion 26, the light receiving part 33L facing the position directly above the opening 32 formed at the center of the ceiling surface of the protrusion 26, and the temperature Each has a detection element lead 34L. The temperature detection element 31L is the same as the temperature detection element 31R. However, the left IH heating coil 6LC is different from the right IH heating coil 6RC in that the coil winding is divided into two and stacked.

As shown in FIG. 8, the left IH heating coil 6LC is arranged on the outer peripheral side of the inner coil 6LC1 wound in a spiral shape, concentrically with the inner coil 6LC1 and spirally wound on substantially the same plane. And the outer coil 6LC2.
The inner coil 6LC1 and the outer coil 6LC2 are electrically connected in series. When energized, the outer coil 6LC2 and the inner coil 6LC1 are energized simultaneously.
Furthermore, a space KS is formed between the inner coil 6LC1 and the outer coil 6LC2. Reference numeral 260 denotes a ventilation hole formed in the base 24. The ventilation hole 260 is for introducing the cooling air Y3 into the space KS.
In the space KS, the cooling air Y3 introduced from the opening 44 (not shown) as in the right IH heating coil 6RC is introduced from the ventilation hole 260 as indicated by an arrow Y3 shown in FIG. The inner coil 6LC1 and the outer coil 6LC2 are cooled and merged with the cooling air Y1, and then flow in the outer circumferential direction while cooling the upper surface of the outer coil 6LC2.
The left IH heating coil 6LC corresponds to the induction heating coil in the present invention. The space KS corresponds to the second gap in the present invention.

Thus, since the cooling air Y3 can be flowed through the space KS between the inner coil 6LC1 and the outer coil 6LC2, the cooling efficiency of the left IH heating coil 6RL that becomes high temperature when energized can be improved.
Further, the left IH heating coil 6RC can be cooled from above by the cooling air Y3 flowing into the cooling air passage 39 from the space KS. Moreover, the buoyancy suppression plate 15 can be cooled from below by the cooling air Y3, and the temperature rise of the buoyancy suppression plate 15 can be suppressed.

  Note that the magnetic flux leakage prevention material 42 does not cover the entire lower surface of the left IH heating coil 6LC, has a cross section formed into a bar shape such as a square or a rectangle, and crosses the left IH heating coil 6LC at predetermined intervals. Since the plurality are provided radially around the protrusion 26, the flow of the cooling air Y3 is not particularly hindered.

In the first embodiment, the left IH heating coil 6LC having, for example, a maximum power consumption (maximum heating power) of 3 KW or 2.5 KW is used. Further, the diameter (maximum outer diameter dimension) of the left IH heating coil 6LC is about 180 mm when the maximum heating power is 3 KW, and is about 170 mm when the maximum heating power is 2.5 KW.
The position of the guide mark 6LM which is a circle (broken line in FIG. 2) displayed on the top plate 21 at a position corresponding to the upper side of the left IH heating source 6L is the position of the left IH heating coil 6LC of the left IH heating source 6L. It does not completely coincide with the outer peripheral position. The guide mark 6LM indicates a proper induction heating area.

  In the following description, the description of “left, right” in the name and “L, R” in the reference may be omitted for the contents shared for the members arranged in common on the left and right.

(Radiation type central electric heating source)
1 and 2 again, reference numeral 7 denotes a radiant central electric heating source (hereinafter referred to as “central heating source 7”). The central heating source 7 is disposed inside the main body part A, substantially on the left and right center line of the top plate 21 and at a position near the rear part of the top plate 21.
The central heating source 7 uses an electric heater (for example, a nichrome wire, a halogen heater, or a radiant heater) that is heated by radiation, and heats an object N to be heated such as a pan through the top plate 21 from below. And, for example, one having a maximum power consumption (maximum heating power) of 1.2 kW is used.

The central heating source 7 has a circular container shape with the entire upper surface opened, and the container-like cover 50 (see FIG. 5) made of heat insulating material constituting the outermost peripheral portion has a maximum outer diameter of about 180 mm, The thickness is 5 mm.
Further, a guide mark 7M of a circle (a broken line in FIG. 2) indicating a position corresponding to the upper side of the central heating source 7 is displayed on the top plate 21 by a method such as printing. The guide mark 7M and the outermost peripheral position of the central heating source 7 do not completely coincide with each other. The guide mark 7M indicates a proper induction heating area.

(Radiation type electric heating source)
As shown in FIGS. 4 and 9, the partition plate 27 has a size that divides the interior of the casing C into two upper and lower spaces. The lower right side is an electric component chamber 8 and the left side is a space 52 with a roaster heating chamber 9.
As shown in FIG. 1 and FIG. 4, the upper and lower partition plates 51 are located between the electrical component chamber 8 and the roaster heating chamber 9 to divide both. The upper end of the upper and lower partition plates 51 is in contact with the lower surface of the partition plate 27 and the lower end is in contact with the inner bottom surface of the casing C.

  Although the upper part chamber 10, the intake chamber 11, and the exhaust chamber 12 are each formed in a compartment, the rooms are not completely separated from each other (in an airtight state). For example, the electrical component chamber 8 communicates with the intake chamber 11 and the exhaust chamber 12.

  As shown in FIG. 9, the space 52 includes a roaster heating chamber 9 (also referred to as a “grill chamber”) formed in a rectangular box shape. The roaster heating chamber 9 has wall surfaces on the left, right, top, bottom, and back sides formed of metal plates such as stainless steel and steel plates, and a pair of upper and lower heaters 22 and 23 as a radiant electric heating source near the top and bottom. (Seeds heater) is installed so as to spread substantially horizontally.

The two heaters 22 and 23 are energized simultaneously or individually to prepare roast cooking (for example, grilled fish), grill cooking (for example, pizza or gratin), or oven cooking for setting the ambient temperature in the roaster heating chamber 9 (for example, Cakes and baked vegetables). For example, the heater 22 near the top ceiling has a maximum power consumption (maximum thermal power) of 1200 W, and the heater 23 near the bottom has a maximum power consumption of 800 W.
The space 52 communicates with the exhaust chamber 12 so that the air in the space 52 is discharged out of the main body A through the exhaust chamber 12.

As shown in FIG. 1, reference numeral 53 denotes a rear partition plate provided at the rear portion of the partition plate 27 in order to form an exhaust chamber 12 different from the upper component chamber 10. The rear partition plate 53 has a height dimension such that the lower end portion is in contact with the partition plate 27 and the upper end portion is in contact with the top plate 21.
As shown in FIGS. 1 and 5, a blower case 54 is provided at the right rear part of the partition plate 27 in order to form an intake chamber 11 different from the upper component chamber 10 and the electrical component chamber 8. The blower case 54 has an upper portion connected to the root portion of a duct 55 in which an intake port 55A is formed.
As shown in FIGS. 1 and 5, 56 is an air outlet formed at the front (front) side center of the blower case 54.
As shown in FIG. 5, 54 </ b> A is a ceiling wall extending continuously from the blower case 54 and horizontally. Reference numeral 57 denotes a blower stored inside the blower case 54. The blower 57 includes a fan unit 58 and a motor 59.
The rear partition plate 53 may be formed integrally by cutting and raising the partition plate 27.

(Cooling fan)
The blower 57 of the first embodiment may be an axial flow type blower, a centrifugal type blower (typically a sirocco fan), a so-called multi-blade type blower, or a turbo blower. In this case, all of these types of fans are included unless otherwise specified.
The blower 57 corresponds to the blowing means in the present invention.

As shown in FIG. 5, the blower 57 uses a sirocco fan of a centrifugal blower in which a partition plate 59A is fixed to a rotating shaft of a motor 59 and a wing portion 57A is formed around the partition plate 59A.
The wind from the blower 57 flows from the right to the left in the upper part chamber 10 as indicated by an arrow Y4 in FIG. 4, and is finally sent out from the exhaust chamber 12 to the outside of the main body A (note that it is fine) Since the wind flow changes in various ways depending on the arrangement of the built-in components, the arrow Y4 indicates the main flow of the wind flow).

  In addition, cooling an IH heating coil etc. using a sirocco fan, for example, patent 3945485, and similarly cooling an IH heating coil etc. using a turbo fan, an axial fan, and a multiblade fan, It is known from JP 2007-184287 A, JP 2004-39263 A, JP 2002-110329 A, and the like. Axial-flow blower, centrifugal blower, or turbo blower have different characteristics from each other, and the amount of generated air and noise (wind noise) are not the same even when driven with the same amount of power. Choose an advantageous system according to your needs.

  Also, as shown in FIG. 5, when a centrifugal blower is used, the portion near the partition plate 59A is the highest part of the discharge capacity (blowout capacity), so the left IH heating is placed in front of the position of the partition plate 59A. When the left mounted circuit board 150L of the source 6L is positioned, the circuit board is cooled by the strongest wind. However, if the air from the indoor space such as kitchen contains oily smoke or dust, it should be noted that it is highly likely to adhere and accumulate on the component surface of the left mounting circuit board 150L. is there. This is because, over many years of use, oil deposits accumulate on the left-mounted circuit board 150L (the same applies to 150R), which leads to a decrease in electrical insulation of the circuit board by absorbing moisture.

(Operating means E)
1 and 2 again, the operation means E of the induction heating cooking apparatus according to the first embodiment includes a front operation unit 60 and an upper operation unit 61.

(Front operation unit 60)
A plastic front operation frame 62 is attached to the right front surface of the main body case 2, and the front surface of the front operation frame 62 is a front operation unit 60. In the front operation unit 60, all the power sources of the left IH heating source 6L, the right IH heating source 6R, the central heating source 7, and the heaters 22 and 23 (see FIG. 9) of the roaster heating chamber 9 are turned on / off all at once. An operation button 63A of the main power switch 63 (see FIG. 1), a right operation dial 64R for opening and closing an electric contact of a control switch (not shown) for controlling energization of the right IH heating source 6R and its energization amount (thermal power), Similarly, the left operation dial 64L of the left control switch (not shown) for controlling the energization of the left IH heating source 6L and its energization amount (thermal power), and the energization of the central heating source 7 and its energization amount (thermal power) are controlled. A central operation dial 65 of a control switch (not shown) is provided.

  The front operation unit 60 is energized to the left IH heating source 6R by the left operation dial 64R and the left indicator lamp 66L that is lit only when the left IH heating source 6L is energized by the left operation dial 64L. And a right indicator lamp 66R that is lit only when it is in the closed state.

  The left operation dial 64L, the right operation dial 64R, and the central operation dial 65 are pushed inward so as not to protrude from the front surface of the front operation unit 60 as shown in FIG. 1 when not in use. In use, when the user presses the finger once and then releases it, it protrudes by the force of a spring (not shown) built in the front operation frame 62 so that the user can grab and turn around It will be. At this stage, energization of the left IH heating source 6L, the right IH heating source 6R, and the central heating source 7 is started.

  Therefore, if any of the protruding left operation dial 64L, right operation dial 64R, or central operation dial 65 is turned to the left or right, a predetermined generated from a built-in rotary encoder (not shown) according to the amount of rotation. Is read by the control means F, the energization amount of the heating source is determined, and the heating power can be set. Regardless of whether the left operation dial 64L, the right operation dial 64R, or the central operation dial 65 is in an initial state or turned to the left or right in the middle, the user presses the front dial once with a finger. When pushed into a predetermined position so as not to protrude from the front surface of the part 60, any of the left IH heating source 6L, the right IH heating source 6R and the central heating source 7 can be de-energized (even during cooking, the right operation If the dial 64R is pushed in, the right IH heating source 6R is immediately de-energized).

  If the operation button 63A of the main power switch 63 (see FIG. 1) is opened (OFF), then the operations of the right operation dial 64R and the left operation dial 64L are all invalidated. Similarly, the energization of the heaters 22 and 23 built in the central heating source 7 and the roaster heating chamber 9 are all cut off.

  Further, three independent timer dials 66, 67, 68 are provided at the lower front portion of the front operation frame 62. These timer dials 66, 67, 68 energize the left IH heating source 6L, the right IH heating source 6R, and the central heating source 7 for a desired time (timer set time) from the start of energization, and after the set time has elapsed. Is for operating a timer switch (not shown) that automatically turns off the power.

(Upper surface operation unit 61)
As shown in FIGS. 2 and 3, the upper surface operation unit 61 includes a right heating power setting operation unit 70, a left heating power setting operation unit 71, and a central operation unit 72.

  An upper surface operation unit 61 is disposed on the upper surface of the top plate 21, specifically, on the front portion of the upper frame 20. A right heating power setting operation unit 70 of the right IH heating source 6R is installed on the right side of the central left and right center line (CL in FIG. 3) of the main body A, and the central heating source 7 and the roaster heating chamber 9 are installed in the center. The central operation unit 72 of the heaters 22 and 23 is arranged, and the left heating power setting operation unit 71 of the left IH heating source 6L is arranged on the left side.

(Right heating power setting operation unit 70)
In FIG. 3, in the right heating power setting operation unit 70 for setting the heating power of the right IH heating source 6R, the heating power of the right IH heating source 6R can be easily set only by pressing once by the user. A one-touch key unit 73 is provided.
The right one-touch key unit 73 includes three one-touch keys, a low heat key 74, a medium heat key 75, and a strong heat key 76. For example, the low heating power key 74 sets the heating power of the right IH heating source 6R to 300 W, the middle heating power key 75 sets to 750 W, and the strong heating power key 76 sets to 2.5 KW.
Further, a 3 KW key 77 is provided at the right end of the right one-touch key 73, and when the heating power of the right IH heating source 6R is desired to be strong (for example, 3 KW), this is pressed.

(Left heating power setting operation unit 71)
In FIG. 3, in the left heating power setting operation unit 71 for setting the heating power of the left IH heating source 6L, the user can easily set the heating power of the left IH heating source 6L only by pressing once. A one-touch key portion 82 is provided.
The left one-touch key portion 82 includes three one-touch keys, a low heat power key 78, a medium heat power key 79, and a high heat power key 80. For example, the low heating power key 78 sets the heating power of the left IH heating source 6L to 300 W, the medium heating power key 79 sets to 750 W, and the high heating power key 80 sets to 2.5 KW.
Further, a 3 KW key 81 is provided at the right end portion of the left one-touch key portion 82, and when it is desired to increase the heating power of the left IH heating source 6L (for example, 3 KW), this is pressed.
The set thermal power by the 3KW key 81 is not limited to 3KW, and may be any thermal power (for example, 2.5KW).

(Central operation unit 72)
As shown in FIG. 3, the central operation unit 72 includes an operation button 90 of an operation switch (not shown) for starting energization of the heaters 22 and 23 of the roaster heating chamber 9 used for roast cooking, oven cooking, and grill cooking. An operation button 91 of an operation switch (not shown) for stopping the energization is provided side by side.
Further, the central operating unit 72 adds or subtracts the control temperature for grill cooking by the heaters 22 and 23 of the roaster heating chamber 9 and electromagnetic cooking by the left IH heating source 6L and the right IH heating source 6R, one by one. Operation buttons 92 and 93 of a temperature adjustment switch (not shown) to be set are provided in a horizontal row. Further, a power on / off switch button 94 for the central heating source 7 is provided.

  Further, a convenient menu key 95 is provided on the central operation unit 72. In other words, deep-fried food cooking (using left IH heating source 6L and right IH heating source 6R), fried food preheating status display (using left IH heating source 6L and right IH heating source 6R to heat oil to a predetermined preheating temperature), Timer cooking (Left IH heating source 6L, right IH heating source 6R, central heating source 7, heaters 22 and 23 provided in the roaster heating chamber 9 are energized and cooked for the time set by the timer counter described later. ), The desired input screen and status display screen can be easily read on the integrated display means 100 described later.

  Reference numeral 96 denotes a right IH convenient menu button. The right IH convenient menu button 96 is a setting button for making various settings for the right IH heating source 6R. Similar setting buttons are provided for the left IH heating source 6L (not shown).

  In FIG. 2, 97R is a start switch (hereinafter referred to as “right timer switch 97R”) for operating / starting a timer counter (not shown), and is provided at the right end of the upper surface operation unit 61. When it is pressed once and started, the time is measured from that point, and the right liquid crystal display unit 98R provided in the right front corner of the top plate 21 (located near the lower surface of the top plate 21 and via the top plate 21). The information on the elapsed time is displayed in units of “minutes” and “seconds” through the display light.

  Similarly, a right fried food selection switch 99R is provided at the right end of the upper surface operation unit 61. When the user presses this switch once, the temperature of the oil in the fried food (tempura) pan by the right IH heating source 6R is initially set to 180 ° C. After that, the user can adjust the heating power of the right IH heating source 6R by operating the right operation dial 64R and set it to any appropriate temperature suitable for fried food, for example, 200 ° C.

  Similarly to the right heating power setting operation unit 70, the left heating power setting operation unit 71 on the left side includes a left timer switch (not shown), a left liquid crystal display unit 98L, and a left fried food selection switch (not shown). One is provided. The left timer switch and the right timer switch 97R, the left liquid crystal display unit 98L and the right liquid crystal display unit 98R, and the left fried food selection switch and the right fried food selection switch 99R are respectively left and right center lines CL of the main body 1 (see FIG. 3). It is provided at the right and left target positions.

(Thermal power indicator lamp)
As shown in FIGS. 2 and 3, the magnitude of the heating power of the right IH heating source 6 </ b> R is displayed at the position between the right IH heating source 6 </ b> R and the right heating power setting operation unit 70 on the right front side of the top plate 21. A right thermal power display lamp 101R is provided. The right thermal power display lamp 101R is provided in the vicinity of the lower surface of the top plate 21 so as to emit display light from the lower surface thereof through the top plate 21 (permeate).
Similarly, a left heating power display lamp 101L that displays the magnitude of the heating power of the left IH heating source 6L is located at a position between the left IH heating source 6L and the left heating power setting operation unit 71 on the left front side of the top plate 21. It is provided in the vicinity of the lower surface of the top plate 21 so that display light is emitted from the lower surface thereof through the top plate 21 (transmitted) to the upper surface side.

Note that the right heating power display lamp 101R for the right IH heating source 6R can display in 12 stages from a heating power of 120 W to a maximum heating power of 3 KW. And in order to show these 12 steps | paragraphs of thermal power with light emission, the right thermal power display lamp 40R has arrange | positioned 12 light emitting diodes linearly. For example, when the heating power is 1, only the leftmost light emitting diode is lit, and the user can easily visually recognize the red light from the surface of the top plate 21.
Similarly, the left heating power display lamp 101L for the left IH heating source 6L is not shown in the figure, but can display from the heating power 120W to the maximum heating power 3KW in 12 steps. In addition, in the case of maximum thermal power 2.5KW, it displays in 11 steps.

(Display means)
As shown in FIGS. 2 and 3, the integrated display means 100 is provided on the front side in the front-rear direction at the center in the left-right direction of the top plate 21. The integrated display means 100 is mainly composed of a liquid crystal panel, and is provided in the vicinity of the lower surface of the top plate 21 so that display light is emitted from the lower surface thereof through the top plate 21 (transmitted).

The integrated display means 100 inputs or sets the settings of the energization states (heating power, time, etc.) of the heaters 22 and 23 of the left IH heating source 6L, the right IH heating source 6R, the central heating source 7 and the roaster heating chamber 9. Information can be confirmed.
That is, corresponding to the following three scenes, information on heating conditions such as operating conditions and thermal power is displayed by characters, illustrations, graphs, and the like. A specific structure and display operation will be omitted.
(1) Functions of the right IH heating source 6R and the left IH heating source 6L (whether cooking operation is being performed or the like).
(2) Function of the central heating source 7 (whether cooking is in progress or the like).
(3) In the case of cooking in the roaster heating chamber 9, operating procedures and functions for performing the cooking (for example, whether roaster, grill, or oven cooking is currently performed).

  The liquid crystal screen used in the integrated display means 100 is a known dot matrix type liquid crystal screen. In addition, a high-definition screen (QVGA with a resolution of 320 × 240 pixels or 640 × 480 dots, equivalent to VGA capable of displaying 16 colors) can be realized, and a large number of characters can be displayed even when characters are displayed. Can do. The liquid crystal screen is not limited to a single layer, but may have two or more layers in order to increase display information. The size of the display screen is about 8 cm (about 3 inches) both vertically and horizontally.

Further, the screen area for displaying information may be divided into a plurality for each heating source. For example, the screen may be assigned to a total of 10 areas and defined as follows.
(1) Corresponding area of the left IH heating source 6L (one each for thermal power and time).
(2) Corresponding area of the central heating source 7 (one each for thermal power and time).
(3) Corresponding area of the right IH heating source 6R (one each for thermal power and time).
(4) For cooking the roaster heating chamber 9 (one each for heating power and time).
(5) A guide area (one piece) for displaying reference information in various cookings as needed or by user operation.
(6) A display area (1) for notifying the user when abnormal driving is detected or improper operation is used.

  Each of the above 10 areas (display areas) is realized on the liquid crystal screen of the integrated display means 100, but is not physically formed or partitioned on the screen itself. Absent. In other words, since it is established by screen display software (microcomputer program), the area, shape, and position can be changed each time by that software. The heating source 6L, the central heating source 7, the right IH heating source 6R and the like are always arranged in the same order in accordance with the left and right order of the respective heating sources. That is, on the screen, information about the left IH heating source 6L on the left side, the center heating source 7 in the middle, and the right IH heating source 6R on the right side are displayed.

  When there are two corresponding areas for the right IH heating source 6R and the left IH heating source 6L, a first display area for displaying the normal state of the “first condition” setting such as heating power (heating amount), and cooking The second, which displays the setting status of the "second condition" such as time, set temperature, etc. (there are more types than the first condition), as well as the "physical quantities such as temperature, current, voltage, etc." The display area may be divided into two areas.

In FIG. 3, reference numeral 102 denotes an information key provided in front of the right side of the integrated display means 100. When the information key 102 is pressed depending on the type of cooking or the progress, the useful reference information is displayed in the guide area of the integrated display means 100. For example, when the information key 102 is pressed, the following information is displayed in the guide area.
(1) Notification of actions not related to user operations / intentions (prevention of forgetting to cut / automatic cleaning of smoke filter, etc.).
(2) Contents that you would like us to go to use automatic cooking (fried food, automatic grill) safely and well.
(3) Notice of rice cake (baking unevenness, etc.) peculiar to heating cookers regarding general cooking
(4) Safety request of the cooking device, alarm contents, and response methods for alarms.

(Roaster heating chamber 9)
As shown in FIG. 9, the front opening 105 of the roaster heating chamber 9 is covered with a door 13 so as to be freely opened and closed. The door 13 is held in the roaster heating chamber 9 by a support mechanism (not shown) so as to be movable in the front-rear direction. Further, a heat-resistant glass window plate 106 is installed in the central opening 107 of the door 13 so that the inside of the roaster heating chamber 9 can be seen from the outside.

A front end portion of a metal tray 108 is connected to the door 13. When cooking with a lot of oil, a metal grill net 109 is usually placed on the tray 108 and used. As a result, when the door 13 is pulled forward, the tray 108 (including the grill 109 when the grill 109 is placed) is also pulled to the front of the roaster heating chamber 9 along with the drawer operation.
Note that the tray 108 is normally detachably supported on both the left and right metal rails DL connected to the door 13 so that the tray 108 is detached from the metal rail DL alone. It can be done.

Further, the shape of the grill 109 and the position, shape, and the like of the tray 108 are devised so that they cannot be pulled out by hitting the lower heater 23 when the tray 108 is pulled forward. Thus, in this roaster heating chamber 9, if meat, fish or other food is placed on the grill 109 and the heaters 22 and 23 are energized (simultaneously or time-divisionally energized), the food is heated from both the upper and lower surfaces. It has a “double-sided baking function”.
The roaster heating chamber 9 is provided with a temperature sensor (not shown) for detecting the room temperature, and cooking can be performed while maintaining the internal temperature at a desired temperature. .

  As shown in FIG. 9, the roaster heating chamber 9 has a cylindrical metal inner frame 111 having an opening 112 on the rear (back) side and a front opening 105 on the front side, and an outer side of the inner frame 111. It is composed of a predetermined (lower) gap 113, an (upper) gap 114, and an outer frame 115 that covers the left and right side gaps (not shown).

The outer frame 115 has five surfaces, that is, left and right side wall surfaces, an upper surface, a bottom surface, and a rear surface, and is entirely formed of a steel plate or the like. The inner surfaces of the inner frame 111 and the outer frame 115 form a coating having a good cleaning property such as an enamel or a heat resistant coating film.
Reference numeral 116 denotes an exhaust port formed in the upper part of the back wall surface of the outer frame 115.
Reference numeral 14 denotes an exhaust duct integrally formed outside the exhaust port 116. The exhaust duct 14 has a square or rectangular cross section, and is inclined obliquely upward as it goes downstream, and then bends in the vertical direction. Communicate.
120 is a deodorizing catalyst. The deodorizing catalyst 120 is installed at a position downstream of the exhaust port 116 inside the exhaust duct 14. Then, it is activated by being heated by the catalyst heater 120H, and functions to remove odor components of hot air passing through the exhaust duct 14 from the inside of the roaster heating chamber 9.

  Reference numeral 110 denotes an annular (b-shaped) packing made of heat-resistant rubber, metal or the like which is attached over the entire inner periphery of the door 13 and is rich in elasticity. The tip of the packing 110 is in contact with the front surface around the front opening 105 of the roaster heating chamber 9 so that hot air does not leak outside between the roaster heating chamber 9 and the door 13.

(Exhaust structure / intake structure)
In FIG. 12, as described above, at the rear of the upper frame 20, the right vent 20 </ b> B (becomes an intake vent), the central vent 20 </ b> C (becomes an exhaust vent), and the left vent 20 </ b> D are horizontally long. Is formed. The above-mentioned rear frame body 121 is fixed on these three rear ventilation openings, and a metal flat plate in which countless small communication holes are formed over the entire upper surface of the rear frame body 121 so as to cover the entire upper surface. A shaped cover 130 is detachably mounted.
The cover 130 may be a metal mesh or a fine lattice shape in addition to a small hole for communicating holes formed in a metal plate by pressing (also called punching metal). In any case, the rear exhaust port 119 (see FIG. 9) may be covered from above so that the user's finger or foreign matter does not enter from above.
122R is a vent formed on the right side of the rear frame 122, 122C is a vent formed in the left and right central portion of the rear frame 122, and 122L is a vent formed on the left side of the rear frame 122.

  An air inlet 55A (see FIG. 5) at the top of the blower case 54 faces directly below the right end of the cover 130, and external room air such as a kitchen is passed into the main body A through the communication hole of the cover 130. It can be introduced.

  As shown in FIGS. 1, 2, and 9, the exhaust duct 14 is located in the exhaust chamber 12. In other words, the exhaust chamber 12 communicating with the space 52 formed around the roaster heating chamber 9 is secured on both the left and right sides of the exhaust duct 14.

As shown in FIG. 1, reference numeral 140 denotes a pair of vent holes formed in the rear partition plate 53. The vent hole 140 is formed in a portion away from the left and right side positions of the exhaust duct 14 by a predetermined dimension. The interior of the upper part chamber 10 communicates with the exhaust chamber 12 through the vent 140.
In FIG. 9, reference numeral 141 denotes a front partition plate erected on the front end portion of the partition plate 27. The front partition plate 141 is installed at a position where a gap 143 of about several millimeters for improving heat insulation is formed between the front partition plate 141 and the vertical wall 144 of the main body case 2 forming the flange 3A on the front. The portion extends to the lower surface of the upper frame 20.

  Reference numeral 145 denotes a gap. This gap 145 is formed between the rear partition plate 53 provided at the rear part of the partition plate 27 in order to form the exhaust chamber 12 different from the upper part chamber 10 and the exhaust duct 14. It is formed by a gap of about several mm for improving heat insulation.

  As shown in FIG. 5, 150 </ b> R is a right side mounted circuit board inside the electrical component chamber 8. The right mounting circuit board 150R is mounted with electric / electronic components that constitute the drive circuit of the right IH heating source 6R, and an inverter circuit for induction heating is formed. Reference numeral 150L denotes a left mounted circuit board. The left mounting circuit board 150L is mounted with electric / electronic components constituting a drive circuit for the left IH heating source 6L, and an inverter circuit for induction heating is formed.

Here, on the right mounting circuit board 150R and the left mounting circuit board 150L on which the inverter circuit and the like are formed, as shown in FIG. 10, a rectifier circuit 221 connected to a commercial power source of 100V or 200V, and the rectifier circuit 221 Necessary for induction heating of the coil 222 connected to the DC output terminal, the smoothing capacitor 223, the resonance capacitor 224 connected to the coil 222 and the smoothing capacitor 223, and the IGBT 225 serving as a switching means connected to these components. Main circuit components are installed.
Details of the control circuit shown in FIG. 10 will be described later.

  In FIG. 5, 151R is an aluminum radiation fin mounted on the right mounting circuit board 150R. Reference numeral 151L denotes aluminum radiating fins mounted on the left mounting circuit board 150L. The heat radiation fins 151 </ b> R and 151 </ b> L are thermoelectrically attached to the IGBT 225 serving as the semiconductor switching means that generates heat in accordance with the power control operation of induction heating. In addition, cooling air is supplied from a blower 57 to be described later in order to prevent the efficiency from being lowered due to the high heat of the IGBT 225.

In FIG. 5, reference numerals 152 and 153 (see FIG. 19) denote a pair of left and right substrate support tables. The right mounting circuit board 150R and the left mounting circuit board 150L are installed on the board supporting bases 152 and 153 so as to be vertically arranged in two stages. As a result, an air passage 154 extending in the front-rear direction of the height H2 is formed in the electrical component chamber 8 with the left and right sides surrounded by the board support bases 152 and 153 and the ceiling surface formed by the left mounting circuit board 150L itself. An air passage 155 extending in the front-rear direction having a height H1 is formed in which the left and right sides are surrounded by the substrate supporters 152 and 153 and the ceiling surface is formed by the partition plate 27 itself.
And the air outlet 56 of the air blower case 54 of the air blower 57 is opposed to the rear part of these two independent air passages 154 and 155, and the cooling air from the air blower 57 is supplied to the two air passages 154 and 155. It has become so.

  The cooling air supplied from the blower 57 to the air passages 154 and 155 passes around the various electric components and the heat radiation fins 151R and 150L mounted on the right mounting circuit board 150R and the left mounting circuit board 150L. It cools and it introduce | transduces into the opening 44 (refer FIG. 6) provided in the partition plate 27 used as the ceiling surface of the upper air path 155. FIG.

Note that the heat generation amount of the right mounting circuit board 150R and the heat generation amount of the left mounting circuit board 150L may not be the same. For example, when the right IH heating source 6R is driven at a maximum heating power of 3 KW and the left IH heating source 6L is driven at a maximum heating power of 2.5 KW, the right mounted circuit board 150R generates a larger amount of heat, but the blower 57 The amount of air blown can sufficiently correspond to the amount of heat generated at the maximum heating power.
In addition, when the heat generation amount of the right mounting circuit board 150R and the heat generation amount of the left mounting circuit board 150L are different, the distribution of the cooling air blowing amount from the blower 57 to the two air paths 154 and 155 may be adjusted. As a method for distributing the air flow, for example, the distribution of the air flow can be adjusted by adjusting the position of the air outlet 56 with respect to the air passages 154 and 155 up and down. Or conversely, the distribution of the air flow rate can be adjusted by adjusting the vertical positions of the right mounting circuit board 150R and the left mounting circuit board 150L.

  In the above description, it is assumed that both the right IH heating coil 6RC and the left IH heating coil 6LC can be cooled by using one cooling fan 57. If there is a concern that the capacity will be insufficient, it can be dealt with by providing a plurality of cooling fans 57. When a plurality of blowers 57 are provided, it is not necessary to use the same type of blower. For example, an axial blower and a centrifugal blower may be combined.

(Auxiliary cooling structure)
In FIG. 5, 160 is an auxiliary cooling fan (auxiliary blower). The auxiliary cooling fan 160 employs an axial flow fan, faces an air vent (not shown) provided in the partition plate 27 and is fixed to the partition plate 27, and the suction port is a space below the partition plate 27. It is exposed to. The auxiliary cooling fan 160 sucks the cooling air from the blower 57 coming out from the outlet side of the two air passages 154 and 155 and sends it to the space above the partition plate 27, that is, the front space of the upper part chamber 10. As a result, the electrical components such as the liquid crystal substrate of the integrated display means 100 in the front space of the upper component chamber 10 are cooled. The auxiliary cooling fan 160 is driven by a motor drive circuit 231 (see FIG. 10).

Reference numeral 162 denotes a partition wall having a shape in which the inner side of the front operation frame 62 (see FIG. 1) is expanded toward the electrical component chamber 8 side. Various control switches (not shown) of the front operation unit 60 (see FIG. 1) are housed in an internal space 163 defined between the inner wall surface of the partition wall 162 and the front operation frame 62. .
Reference numeral 164 denotes a vent hole formed in the rear wall of the partition wall 162. Reference numeral 165 denotes a ventilation hole provided on the wall surface of the ceiling of the partition wall 162. A part of the cooling air from the blower 57 enters through the ventilation hole 164, cools the internal space 163, and is discharged from the ventilation hole 165.

(Auxiliary exhaust structure)
As shown in FIG. 9, a bottom 170 having a shape recessed downward by one step is formed on the downstream side of the deodorizing catalyst 120 in the exhaust duct 14.
Reference numeral 171 denotes an exhaust / vent hole formed in the center of the bottom 170. When hot exhaust from the roaster heating chamber 9 naturally rises and exhausts the exhaust duct 14 due to the pressure difference between the inside and outside, the air inside the main body A is attracted from the exhaust / vent hole 171 as indicated by the arrow Y5. . Thereby, the air in the space around the roaster heating chamber 9 can be gradually exhausted from the upper end opening 118 of the exhaust duct 14.

Reference numeral 172 denotes a guide plate installed at a position directly below the exhaust / vent hole 171. The guide plate 172 is fixed to the inner wall surface of the main body case 2.
Reference numeral 173 denotes a corrosion-resistant metal container having an open top surface having a volume of about 800 to 1000 CC. The corrosion-resistant metal container 173 receives water or the like that has entered from the upper end opening 118 by mistake. As a result, even if water or the like flows above the top plate 21 by mistake and water or the like enters from the upper end opening 118, entry into the roaster heating chamber 9 can be suppressed.
Reference numeral 174 denotes a support base on which the corrosion-resistant metal container 173 is placed. The support base 174 is formed of a metal plate and is fixed to the rear (back) wall surface of the roaster heating chamber 9.

Water or the like accumulated in the corrosion-resistant metal container 173 receives heat transferred from the wall surface of the roaster heating chamber 9 and is naturally dried.
Note that a structure such as the bottom 170 of the exhaust duct 14 is provided so that all the water and the like that has entered the exhaust chamber 12 from a portion other than the upper end opening 118 of the exhaust duct 14 can be concentrated in the corrosion-resistant metal container 173. Or a structure such as a guide plate 172 may be provided.

(Control means F)
As shown in FIG. 10, the control circuit is formed by an energization control circuit 200 configured by incorporating one or a plurality of microcomputers.
The energization control circuit 200 includes an input unit 201, an output unit 202, a storage unit 203, and an arithmetic control unit 204. The energization control circuit 200 serves as a central control means for controlling all the heating sources and the display means G by being supplied with DC power via a constant voltage circuit (not shown).

In FIG. 10, an inverter circuit 210R of the right IH heating source 6R is connected to a commercial power supply having a voltage of 100 V or 200 V via a rectifier circuit 221 (also referred to as a rectifier bridge circuit).
Similarly, an inverter circuit 210L of the left IH heating source 6L is connected to the commercial power supply via a rectifier circuit 221 (not shown) in parallel with the inverter circuit 210R of the right IH heating source 6R.
Reference numeral 211 denotes a heater driving circuit for the central heating source 7. A heater drive circuit 212 drives the heater 22 for heating the inside of the roaster heating chamber 9. Reference numeral 213 denotes a heater drive circuit that drives the heater 23 for heating the inside of the roaster heating chamber 9. Reference numeral 214 denotes a heater drive circuit for driving the catalyst heater 120H provided in the middle of the exhaust duct 14. Reference numeral 215 denotes a drive circuit that drives the liquid crystal screen of the integrated display means 100. Reference numeral 230 denotes a drive circuit for the motor 59 of the blower 57 for keeping the internal space of the main body A in a certain temperature range. Reference numeral 231 denotes a motor drive circuit of the motor 161 of the auxiliary cooling fan 160 fixed to the partition plate 27.
In addition, setting information from the front operation unit 60 and the upper operation unit 61 is input to the energization control circuit 200.

  The inverter circuit 210R of the right IH heating source 6R is connected to the right IH heating coil 6RC (induction heating coil) shown in FIG. 6, the rectifier circuit 221 having the input side connected to the bus of the commercial power supply, and the DC side output terminal. A DC circuit composed of the coil 222 and the smoothing capacitor 223, a resonance circuit composed of a parallel circuit of the right IH heating coil 6RC and the resonance capacitor 224, one end of which is connected to a connection point between the coil 222 and the smoothing capacitor 223; An IGBT 225 serving as switching means having a collector connected to the other end of the resonance circuit.

  The emitter of the IGBT 225 is connected to a common connection point between the smoothing capacitor 223 and the rectifier circuit 221. The flywheel diode 226 is connected between the emitter and collector of the IGBT 225 so that the anode is on the emitter side.

Reference numeral 227 denotes a current detection sensor. The current detection sensor 227 detects a current flowing through a resonance circuit composed of a parallel circuit of the right IH heating coil 6RC and the resonance capacitor 224. The detection output of the current detection sensor 227 is supplied to the input unit 201 of the energization control circuit 200. When a pan or the like inappropriate for induction heating is used, or when an accident occurs, the detected current output is more than a predetermined value. When an undercurrent or an overcurrent of the difference is detected, the energization control circuit 200 controls the IGBT 225 via the drive circuit 228, and the energization of the right IH heating coil 6RC is instantaneously stopped.
Similarly, the inverter circuit 210L of the left IH heating source 6L has a circuit configuration equivalent to that of the right heating source circuit 206R and will not be described, but 6LC is a left IH heating coil and 224L is a resonance capacitor.

  Although not shown, the current detection sensor 227 is similarly provided in the inverter circuit 210L of the left IH heating source 6L. The current detection sensor 227 includes a shunt that measures current using a resistor and a method that uses a current transformer.

In the cooking apparatus that heats the object N to be heated by the induction heating method as in the first embodiment, the power control circuit for flowing high-frequency power to the heating coils 6RC and 6LC is called a so-called resonant inverter. .
A configuration in which an IGBT 225 which is a switching circuit element is turned on / off at a driving frequency of about 20 to 40 KHz to a circuit in which the inductance of the heating coils 6RC and 6LC including the object to be heated N (metal) and the resonance capacitor 224 are connected It is.
The resonance type inverter includes a current resonance type that is said to be suitable for a 200 V power supply and a voltage resonance type that is said to be suitable for a 100 V power supply.
The configuration of such a resonant inverter circuit is divided into so-called half-bridge circuit and full-bridge circuit depending on how the connection destination of the heating coils 6RC, 6LC and the resonant capacitor 224 is switched by the relay circuit. .

When the object to be heated N is induction-heated using a resonance type inverter circuit, if the object to be heated N is a magnetic material such as iron or magnetic stainless steel, the resistance component (equivalent resistance) that contributes to heating is large, and the electric power is It is easy to heat up because it is easy to put in, but when the object to be heated N is a non-magnetic material such as aluminum, the equivalent resistance is small, so the eddy current induced in the object to be heated N is unlikely to be changed to the Joule heat. For this reason, when it is determined that the material of the object to be heated N is a magnetic material, the inverter circuit configuration is automatically changed to the half-bridge method, and in the case of the object to be heated N using a magnetic material, a full bridge is used. It is known to perform control of switching to a system (for example, Japanese Patent Laid-Open Nos. 5-251172, 9-185986, and 2007-80751).
In the present embodiment, unless otherwise specified, inverter circuits 210R and 210L may be configured as a half bridge circuit or a full bridge circuit.

As described above, when the object to be heated N (metal object) is induction-heated by energization of the heating coils 6RC and 6LC, in the case of the object to be heated N of a magnetic material such as iron, switching is made to the circuit connected to the resonance capacitor 224 The IGBT 225 which is a circuit element is controlled to be turned on / off at a driving frequency of about 20 to 40 KHz, and a current having a frequency of about 20 to 40 KHz may be supplied.
On the other hand, when the object to be heated N is made of a material having a high electrical conductivity such as aluminum or copper, a large current is passed through the heating coils 6RC and 6LC to obtain a desired heating output. It is necessary to induce a large current in Therefore, in the case of an object to be heated N made of a material having high electrical conductivity, it is necessary to perform on / off control at a driving frequency of 60 to 70 KHz.

  However, when a current having a high frequency of about 60 to 70 KHz is supplied in this way, the magnetic repulsion between the object to be heated N and the heating coils 6RC and 6LC increases, and the object to be heated N has the heating coils 6RC and 6LC. A big force will work in the direction away from. Therefore, the “lifting phenomenon” (also referred to as “lifting phenomenon”) of the object to be heated N may occur, and in order to prevent this, in Embodiment 1 of the present invention, as described above, from the electric conductor, The buoyancy suppression plate 15 is interposed between the heating coils 6RC, 6LC and the object N to be heated, for example, in close contact with the lower surface of the top plate 21 or the like.

(Temperature detection circuit)
In FIG. 10, 240 is a temperature detection circuit. Temperature detection information from the following temperature detection elements is input to the temperature detection circuit 240.
(1) A temperature detection element 31R provided at the center of the right IH heating coil 6RC.
(2) A temperature detection element 31L provided at the center of the left IH heating coil 6LC.
(3) A temperature detecting element 241 provided in the vicinity of the electric heater of the central heating source 7.
(4) A temperature detecting element 242 for detecting the internal temperature of the roaster heating chamber 9.
(5) A temperature detection element 243 installed in the vicinity of the integrated display means 100.
(6) A temperature detecting element 244 attached in close contact with the heat dissipating fin 151R in the electrical component chamber 8.
(7) A temperature detecting element 245 attached in close contact with the heat dissipating fin 151L in the electrical component chamber 8.

  Two or more temperature detection elements may be provided for the temperature detection object. For example, the temperature detection element 31R of the right IH heating source 6R may be provided in the central portion and the outer peripheral portion of the right IH heating coil 6RC to achieve more accurate temperature control. Further, the temperature detection element may be configured by using a different principle. For example, the temperature detection element at the center of the right IH heating coil 6RC may be an infrared type, and the one provided at the outer peripheral part may be a thermistor type.

The drive circuit 230 of the motor 59 of the blower 57 always operates the blower 57 and supplies cooling air according to the temperature measurement status from the temperature detection circuit 240 so that each temperature measurement portion does not become higher than a predetermined temperature. To cool each part.
The motor drive circuit 231 of the motor 161 of the auxiliary cooling fan 160 requires the energization control circuit 200 based on the temperature detection information from the temperature detection circuit 240 so that the liquid crystal screen portion of the integrated display means 100 does not become higher than a predetermined temperature. It is driven by judging the operation state (the magnitude of the blowing amount).

(Top operation structure)
As shown in FIGS. 14 and 15, the upper surface operation portion 61 is located above the flange 2T of the front flange plate 2B made of a metal plate that is fixed to the front end portion of the upper surface opening 2SP of the main body case 2.
The upper surface operation unit 61 includes a resin substrate case 250, a total of 15 pressing operation switches 251 attached to the upper surface of the substrate case 250, a substrate 253 on which electronic component elements 252 and the like are mounted. The push button case 254 having the push button 254A is provided so as to cover the upper side of the switch 251 and the outer peripheral edge portion is adhered to the front frame body 123 so as to cover the upper side of the push button case 254. And a membrane sheet 255.

The push button case 254 is attached to the frame of the substrate case 250 so as to cover the substrate 253.
255A is a push button support piece rich in elasticity. The push button 254A is supported on the push button case 254 by the push button support piece 255A. That is, when the push button 254A is pushed down by the user, the push button 254A is moved downward by a predetermined dimension of about 1 mm to several mm, the push operation type switch 251 is closed, and the push button 254A is pushed from that state. When the operation is stopped, the push button support piece 255A returns to its original upper position due to its elasticity, and the push operation type switch 251 is opened.

As shown in FIGS. 14 and 15, a pair of left and right support pieces 256 </ b> R and 256 </ b> L projecting rearward are integrally formed on the vertical wall portion of the front flange plate 2 </ b> B.
The substrate case 250 is formed long in the lateral width direction of the top plate 21, and a flat plate-like hanging portion 259 is integrally formed along the rear edge of the substrate case 250. The hanging portion 259 is inserted between the support pieces 256R and 256L and is supported so as to be movable up and down.
Reference numeral 258 denotes a window necessary for forming the resin support pieces 256R and 256L using a molding die.

  Reference numeral 257 denotes an elastic body. The elastic body 257 is an elastic body formed in a bar shape with a square cross section interposed between the lower surface of the substrate case 250 and the upper surface of the flange 2T of the front flange plate 2B. For example, the elastic body 257 is formed of a silicon rubber material. The elastic body 257 may be provided in such a length as to cover the entire width of the lower surface of the substrate case 250, or may be provided only at the left and right ends of the lower surface of the substrate case 250, or may be scattered at predetermined intervals. More than one location may be provided.

  As shown in FIG. 11, the elastic body 257 is pushed up abnormally by the push button 254A exceeding a predetermined allowable dimension against the pressing force from below when the front side of the cooking device is in contact with the kitchen furniture KT. Has less repulsive force. That is, when the front side of the cooking device hits the kitchen furniture KT and the flange 2T of the front flange plate 2B is bent upward, the bending is absorbed by the elastic body 257 and further absorbed by the substrate case 250 supported so as to be movable up and down. Is done.

(Operation of cooking device)
Next, the outline | summary of operation | movement of the heat cooking apparatus which consists of said structure is demonstrated.
The storage unit 203 in the energization control circuit 200 stores a basic operation program from turning on the power to starting cooking preparation.
First, the power plug is connected to a 200V commercial power source, and the power is turned on by pressing the operation button 63A of the main power switch 63 (see FIG. 1).

Then, a predetermined power supply voltage is supplied to the energization control circuit 200 via a constant voltage circuit (not shown), and the energization control circuit 200 is activated.
First, the energization control circuit 200 performs a self-diagnosis by a control program of the energization control circuit 200 itself, and performs an abnormality monitoring process before cooking.

The temperature detection circuit 240 reads temperature data from the temperature detection elements 31R, 31L, 241, 242, 243, 244, and 245 provided in a total of seven locations, and sends the temperature data to the energization control circuit 200.
As described above, the energization control circuit 200 collects data such as circuit currents, voltages, temperatures, and the like of main components, and therefore abnormal heating determination is performed as abnormality monitoring control before cooking. For example, when the temperature around the liquid crystal substrate of the integrated display means 100 detected by the temperature detection element 243 is higher than the heat resistant temperature (for example, 70 ° C.) of the liquid crystal display substrate, it is determined that the temperature is abnormally high.

The current detection sensor 227 provided in the inverter circuit 210R of the right IH heating source 6R detects a current flowing in a resonance circuit composed of a parallel circuit of the right IH heating coil 6RC and the resonance capacitor 224, and energizes the detection result. This is supplied to the input unit 201 of the control circuit 200.
Similarly, the current detection sensor 227 provided in the inverter circuit 210L of the left IH heating source 6L detects a current flowing in a resonance circuit composed of a parallel circuit of the left IH heating coil 6LC and the resonance capacitor 224, and the detection result is obtained. This is supplied to the input unit 201 of the energization control circuit 200.
The energization control circuit 200 compares the current detection result of the resonance circuit input to the input unit 201 with the normal current value of the determination reference data stored in the storage unit 203 to detect an undercurrent or an overcurrent. If it is, it is determined that there is some kind of accident or poor continuity, and it is determined as abnormal.

If no abnormality is determined in the above self-diagnosis step, “cooking start preparation is completed”. If there is no abnormality, the energization control circuit 200 preliminarily drives the drive circuit 230 that drives the motor 59 of the blower 57.
The energization control circuit 200 preliminarily drives a motor drive circuit 231 that drives the motor 161 of the auxiliary cooling fan 160. Furthermore, the motor drive circuit 231 drives the motor 161 with a predetermined rated current and starts the operation of the auxiliary cooling fan 160.
The energization control circuit 200 preliminarily activates the inverter circuit 210R of the right IH heating source 6R, the inverter circuit 210R of the right IH heating source 6R, and the driving circuit 215 of the integrated display unit 100, respectively.
However, when an abnormality determination is made, the energization control circuit 200 performs a predetermined abnormality process and is unable to start cooking.

(Cooking mode)
Next, the operation when the cooking mode is shifted to after the above-described abnormality monitoring process before cooking will be described using the right IH heating source 6R as an example.
First, the user turns the right operation dial 64R of the front operation unit 60 to the right or left (the heating power is set according to the amount of rotation).

An operation signal from the front operation unit 60 is input to the energization control circuit 200. The energization control circuit 200 receives operation signals from various switch operation keys (for example, operation switches such as the thermal power keys 74, 75, and 76 and the right timer switch 97R) from the upper surface operation unit 61. And cooking conditions, such as a heat-power level and a heating time, are set.
Next, the energization control circuit 200 drives the drive circuit 228 of the inverter circuit 210R based on the set cooking condition, and drives the inverter circuit 210R of the right IH heating source 6R. Then, when the drive circuit 228 applies a drive voltage to the gate of the IGBT 225, a high-frequency current flows through the right IH heating coil 6RC.
As a result, the pan of the object to be heated N becomes hot due to the high frequency magnetic flux from the right IH heating coil 6RC, and the electromagnetic induction heating cooking operation (cooking mode) is started.
The energization control circuit 200 drives the drive circuit 215 of the integrated display unit 100 to display cooking condition information such as heating power and cooking time in the display area of the integrated display unit 100.

(Electromagnetic induction heating and thermal power control)
A commercial power source is connected to the rectifier circuit 221 of the inverter circuit 210R. From this commercial power supply, a low frequency alternating current and voltage of 50 Hz or 60 Hz are supplied.
The rectifier circuit 221 is a circuit that rectifies an alternating current of a commercial power source into a direct current, and is configured by, for example, connecting two thyristors and two diodes in a bridge (specific configuration is disclosed in, for example, Japanese Patent Laid-Open No. 1-246783). Of FIG. 1).
The smoothing capacitor 223 is a capacitor having a relatively large capacity for removing the ripple current, and smoothes the pulsating current rectified by the rectifier circuit 221.

The direct current obtained by the rectifier circuit 221 and the smoothing capacitor 223 is input to the collector of the IGBT 225 that is a switching element. On / off control of the IGBT 225 is performed by inputting a drive signal from the drive circuit 228 to the base of the IGBT 225. A high frequency current is generated in the right IH heating coil 6RC by combining the on / off control of the IGBT 225 and the resonance capacitor 224. Due to the electromagnetic induction effect brought about by this high-frequency current, an eddy current is generated in the heated object N such as a pan placed on the top plate 21 above the right IH heating coil 6RC.
Thus, the eddy current generated in the heated object N becomes Joule heat and the heated object N generates heat, which can be used for cooking.

  The drive circuit 228 has an oscillation circuit (not shown). A drive signal generated by the oscillation circuit is supplied to the base of the IGBT 225 to control the IGBT 225 on and off. By adjusting the oscillation frequency and oscillation timing of the oscillation circuit of the drive circuit 228, the conduction ratio, conduction timing, current frequency, etc. of the right IH heating coil 6RC are adjusted, and the heating power of the right IH heating coil 6RC can be adjusted. .

  In addition, since the configuration in which the oscillation circuit is variable causes a difference in oscillation frequency between the stoves in a multi-port stove, Japanese Patent No. 2532565, Japanese Patent Laid-Open No. 9-185985, etc. are proposed as means for solving the problem. Has been.

(Demand control)
In the case of having many heating means (right IH heating source 6R, left IH heating source 6L, central heating source 7, and heaters 22 and 23) that can be used simultaneously as in the induction heating cooker of the first embodiment It is necessary to control the maximum settable heating power of each heating means so that the total input current when using multiple heating means at the same time does not exceed the current capacity limit of the household distribution board (if it exceeds, Breaker will be cut off).
For example, if the total power capacity is a maximum of 4.8 KW, the left IH heating source 6L is 3 KW, and the right IH heating source 6R is 2.5 KW, setting both heating sources to the maximum heating power at the same time will result in a current capacity limit of 5.5 KW. Will be exceeded.

  Therefore, in the state where the left IH heating source 6L is already operated with a heating power of 3 KW, the energization control circuit 200 has a heating power of the right IH heating source 6R of (total power capacity 4.8 KW) − (left IH heating source 6L). The heating power setting range of the right IH heating source 6R is limited so as not to exceed (heating power 3KW) = (1.8KW).

Alternatively, when setting the heating power exceeding 1.8 KW to the right IH heating source 6R, the energization control circuit 200 can also control to automatically lower the heating power of the left IH heating source 6L. .
In addition, the energization control circuit 200 may determine a predetermined priority order for each heating unit, and sequentially assign the heating power of each heating unit in preference to the heating unit having a higher priority.
For example, the total power limit is 4.8 KW, and the maximum heating power of the left IH heating source 6L, the right IH heating source 6R, the central heating source 7, and the grille (heaters 22, 23) is 3 KW, 2.5 KW, 1. In the case of 5KW and 2KW (total value of heater 22 and heater 23), when the priority of each heating means is 1st, 2nd, 4th and 3rd respectively, When 3KW is set, the maximum heating power of the right IH heating source 6R is 1.8KW. When the maximum heating power of the right IH heating source 6R is actually set to 1.8KW, it can be set to the central heating source 7 and the grill. Each firepower is 0.

  Also, when 1 KW is set as the heating power of the left IH heating source 6L under these conditions, the right IH heating source 6R can set the heating power up to 2.5 KW, but the right IH heating source 6R is set to a heating power of 2.5 KW. Even if it goes, the total thermal power is 3.5 kW, so there is 1.3 kW of surplus power up to the total power limit of 4.8 kW. Therefore, the heating power of up to 1.3 KW is allowed for the grill, and the difference between the heating power set for the grill and the maximum allowable heating power is the maximum heating power allowed for the central heating source 7.

  The heating power value of each heating means is calculated by using various switch operation keys (for example, heating power keys 74, 75, 76, roaster) of the right heating power setting operation section 70, the central operation section 72, and the left heating power setting operation section 71 of the upper surface operation section 61. The setting value of the operation switch for starting energization of the heaters 22 and 23 in the heating chamber 9 may be used directly, or the various switch operation keys are connected to the IH heating coil through the energization control circuit 200 and the drive circuit 228. The detected current may be detected by the current detection sensor 227, and the heating power may be obtained from the detected current value.

(Abnormal monitoring during cooking)
The induction heating cooking apparatus according to the first embodiment performs abnormality monitoring control even during cooking.
During cooking, the energization control circuit 200 determines whether the current value detected by the current detection sensor 227 is an undercurrent or an overcurrent compared to a normal current value.
If the current value detected by the current detection sensor 227 is an undercurrent or an overcurrent, the energization control circuit 200 controls the IGBT 225 via the drive circuit 228 and instantaneously stops energization of the right IH heating coil 6RC. .
In addition to the temperature detecting element 31R provided at the center of the right IH heating coil 6RC, the portion where the temperature rises during cooking includes two radiating fins 151R and 151L installed inside the electrical component chamber 8 The part of the integrated display means 100 located inside the upper part chamber 10 can be considered.
Therefore, the energization control circuit 200 monitors the temperature data from the temperature detection elements 31R, 31L, 241, 242, 243, 244, and 245 via the temperature detection circuit 240 to monitor whether or not the temperature is abnormal. To do.

If the abnormality is determined to be abnormally high, the energization control circuit 200 executes a predetermined abnormality correction process.
For example, when the energization control circuit 200 determines that the right IH heating source 6R is at an abnormally high temperature, it controls the drive circuit 230 of the motor 59 to increase the rotation speed of the blower 57 and increase the cooling air volume. If the improvement effect does not appear even if this is continued for a predetermined time, the heating power (electric power) of the right IH heating source 6R is forcibly lowered (from what the user has set). For example, the power is reduced to the maximum of the three of one of the thermal power under one stage, the thermal power under 300 W, or the thermal power of 10% (lower to 2.7 KW when used with 3 KW thermal power).
When such an abnormality correction process is executed, the energization control circuit 200 drives the drive circuit 215 of the integrated display unit 100 to notify the predetermined display area of the integrated display unit 100 that the heating power is automatically reduced. Is displayed.

Then, the energization control circuit 200 determines again whether or not the high temperature abnormal state has been resolved within a predetermined short time from the time when it is determined that the abnormality has occurred in the right IH heating source 6R. In the energization control circuit 200, the detection temperature of the temperature detection element 31R of the right IH heating source 6R is a predetermined temperature (for example, 300 ° C.) or the detection temperature of the temperature detection element 243 of the liquid crystal display substrate of the integrated display means 100 is When the temperature reaches a predetermined temperature (for example, 70 ° C.), the energization of the right IH heating source 6R is immediately stopped.
When the energization is stopped, the energization control circuit 200 drives the drive circuit 215 of the integrated display unit 100 and causes the integrated display unit 100 to display information indicating that the right IH heating source 6R has been automatically stopped. Therefore, when the user looks at the screen display of the integrated display means 100, it is easy to understand that the automatic stop has occurred due to abnormal temperature rise.

When a command to stop energization of the right IH heating source 6R is issued, the energization of the right IH heating source 6R is stopped, but the cooling for cooling the right IH heating coil 6RC of the right IH heating source 6R is stopped. The blower 57 continues to operate for 2 minutes to 5 minutes even after the energization is stopped. Thereby, the hot air stays in the vicinity of the right IH heating source 6R immediately after the stop of the blowing from the cooling blower 57, and the overshoot problem that the temperature rises rapidly can be prevented. Further, it is possible to prevent the adverse effect that the temperature of the integrated display unit 100 becomes high.
The operation continuation time is determined from a formula or numerical table that is determined in advance by the energization control circuit 200 in accordance with conditions such as the temperature rise until the energization is stopped, the room temperature, and the operating heat power level of the heating source.

  However, when it is found that the blower 57 itself is out of order, such as when an abnormal current from the cooling blower 57 is detected (for example, when only the temperature of the radiating fin 151R is rising), the cooling is performed. The energization of the air blower 57 is also stopped simultaneously.

  The auxiliary cooling fan 160 is operated while the cooling fan 57 is operated. Further, even when the cooling fan 57 is abnormally stopped, the auxiliary cooling fan 160 also serves to supply cold air to the integrated display means 100, so that the operation is continued.

The liquid crystal display substrate of the integrated display means 100 is heated by reflected heat from the bottom of the heated object N or radiant heat from the top plate 21 when the right IH heating source 6R or the left IH heating source 6L is cooked. . Further, when the used hot tempura pan is placed on the central portion of the top plate 21 as it is, it receives heat from the hot pan (near 200 ° C.).
Therefore, in the first embodiment, air cooling is performed from the right side by the auxiliary cooling fan 160 in order to suppress the temperature increase of the integrated display unit 100.

As described above, in the present embodiment, the buoyancy suppression plate 15 is positioned at a predetermined position by the rib 37, and the cooling air passage 39 is formed between the heating coils 6RC and 6LC and the buoyancy suppression plate 15. Cooling air supplied from the blower 57 is introduced into the cooling air passage 39 to cool the buoyancy suppression plate 15 and the heating coils 6RC and 6LC. For this reason, the cooling efficiency of the buoyancy suppression plate 15 and the heating coils 6RC and 6LC can be improved, and the temperature rise of the buoyancy suppression plate 15 and the heating coils 6RC and 6LC can be suppressed.
Further, the protrusion 38 of the rib 37 and the lower surface of the buoyancy suppression plate 15 come into contact with each other, and the buoyancy suppression plate 15 is positioned at a predetermined position. For this reason, the buoyancy suppression plate 15 can be easily installed.
The ribs 37 are integrally formed on the upper surfaces of the heating coils 6RC, 6LC by a resin adhesive 36 that fixes the assembly wires 35 of the heating coils 6RC, 6LC. For this reason, the whole heating coils 6RC and 6LC are firmly integrated, and a predetermined circular shape can be maintained.

  A space KS is formed between the inner coil 6LC1 and the outer coil 6LC2. Cooling air supplied from the blower 57 is introduced into the space KS and the cooling air passage 39 to cool the buoyancy suppression plate 15 and the heating coils 6RC and 6LC. For this reason, the cooling efficiency of the buoyancy suppression plate 15 and the heating coils 6RC and 6LC can be improved, and the temperature rise of the buoyancy suppression plate 15 and the heating coils 6RC and 6LC can be suppressed.

  Furthermore, since the cooling efficiency of the buoyancy suppression plate 15 and the heating coils 6RC and 6LC can be improved, the driving capability of the blower 57 can be reduced, and the energy consumption can be reduced.

Embodiment 2. FIG.
FIG. 18 is a plan view of the entire induction heating cooking apparatus according to the second embodiment.
FIG. 19 is a longitudinal sectional view of the induction heating coil portion according to the second embodiment.
FIG. 20 is an enlarged longitudinal sectional view showing a part of the right induction heating coil according to the second embodiment.
FIG. 21 is an enlarged longitudinal sectional view showing a part of the left induction heating coil according to the second embodiment.

  Hereinafter, in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals. In FIG. 18 and FIG. 19, detailed parts are not shown.

  As shown in FIGS. 18-20, the induction heating cooking apparatus in this Embodiment 2 differs from the said Embodiment 1 in the positioning method of the buoyancy suppression board 15 of right IH heating coil 6RC and left IH heating coil 6LC. ing. Note that the right IH heating coil 6RC and the left IH heating coil 6LC are not identical in structure, but it is more advantageous to arrange them in any structure for production management.

(Right IH heating coil 6RC)
As shown in FIG. 18, in the induction heating cooking apparatus according to the second embodiment, the right IH heating coil 6RC and the left IH heating coil 6LC are located sideways so that their front ends are aligned on a horizontal line (LF). Has been placed.

As shown in FIG. 20, the protrusion provided on the rib 37 of the right IH heating coil 6RC in the second embodiment has a high protrusion (hereinafter referred to as “protrusion 38A”) and a low protrusion ( (Hereinafter referred to as “projections 38B”).
The protrusion 38A corresponds to the first protrusion in the present invention. Further, the protrusion 38B corresponds to the second protrusion in the present invention.

  The protrusion 38A having a high height is formed in the vicinity of the outer peripheral end of the rib 37. The top of the protrusion 38 </ b> A is in contact with the lower surface of the top plate 21 through the through hole 15 </ b> E <b> 10 of the buoyancy suppression plate 15. The diameter of the protrusion 38A has a dimensional relationship slightly smaller than the inner diameter of the through hole 15E10.

The protrusion 38A having a low height is formed on the inner peripheral side from the protrusion 38B. The top of the protrusion 38 does not protrude above the through-hole 15E6 provided in the buoyancy suppression plate 15, and an adhesive, for example, a heat-resistant silicone rubber-based adhesive 270, is poured into the top to provide the protrusion 38B and the through-hole 15E6. And are fixed.
Since the diameter of the protrusion 38B is larger than the inner diameter of the through hole 15E6, the peripheral edge of the through hole 15E6 of the buoyancy suppressing plate 15 is supported by the protrusion 38B from below.

The rib 37 is integrally formed with the adhesive 36 on the upper surface of the right IH heating coil 6RC. When the right IH heating coil 6RC is viewed from the upper surface, the ribs 37 are formed at even intervals such as 8, 10 or 12 at a constant interval so as to be radially centered on the protrusion 26.
Reference numeral 39 denotes a cooling air passage. The cooling air passage 39 is formed along the longitudinal direction of the rib 37 between the upper side of the right IH heating coil 6RC and the buoyancy suppression plate 15 by the upper end portion of the protrusion 38B coming into contact with the lower surface of the buoyancy suppression plate 15. It was a wind path.
Reference numeral 272 denotes a minute gap. The minute gap 272 is an air passage formed between the lower surface of the top plate 21 and the upper surface of the buoyancy suppressing plate 15 by the upper end portion of the protrusion 38 </ b> A coming into contact with the lower surface of the top plate 21. The interval between the minute gaps 272 is about 0.5 mm to 1 mm.
The cooling air passage 39 and the minute gap 272 correspond to the first gap in the present invention.

  As in the first embodiment, the right IH heating coil 6RC includes an inner coil 6RC1 wound in a spiral shape, a concentric circle on the outer peripheral side of the coil, and another large-diameter spiral on substantially the same plane. The outer coil 6RC2 wound in a shape is energized in three patterns: energization of the inner coil 6RC1, energization of the outer coil 6RC2, and energization of both the inner and outer coils. The energization control circuit 200 can select at least one of an output level, a duty ratio, and an output time interval of high-frequency power to be passed through these two coils, or a combination thereof.

As in the first embodiment, a space KS is formed between the inner coil 6LC1 and the outer coil 6LC2. Reference numeral 260 denotes a ventilation hole formed in the base 24. The ventilation hole 260 is for introducing the cooling air Y3 into the space KS.
That is, since the rib 37 does not cover the entire upper surface of the right IH heating coil 6RC, air from below the right IH heating coil 6RC flows on both sides of the rib 37.
Reference numeral 271 denotes an opening. The opening 271 is formed at the center of a rib 37 that extends radially around the protrusion 26 of the base 24. Cooling air introduced from below the protrusion 26 is introduced into the opening 271 as indicated by an arrow Y2 shown in FIG. 20 and flows in the outer circumferential direction while cooling the upper surface of the right IH heating coil 6RC.
The space KS corresponds to the second gap in the present invention. The base 24 corresponds to the base body in the present invention.

In this way, the cooling air passage 39 is formed radially around the protrusion 26 by the rib 37 formed on the upper surface of the right IH heating coil 6RC. A minute gap 272 is formed by the protrusions 38 </ b> A and 38 </ b> B formed on the rib 37. For this reason, it is possible to effectively flow the cooling air Y1 from the center of the cooling air passage 39 and the minute gap 272.
With this cooling air Y1, the right IH heating coil 6RC can be cooled from above, and the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved.
Further, since the minute gap 272 is formed, the buoyancy suppression plate 15 can be cooled from above and below by the cooling air Y1, and the temperature rise of the buoyancy suppression plate 15 can be suppressed.
Further, since the buoyancy suppression plate 15 is positioned by the projections 38A and 38B of the rib 37, the buoyancy suppression plate 15 can be easily installed.

(Left IH heating coil 6RL)
As shown in FIG. 21, in the left IH heating coil 6RL, the surface of the assembly line 35 formed by assembling a large number of thin wires of about 0.1 mm is coated with an insulating material, for example, a fluorine-based resin. Reference numeral 24 denotes a base. The base 24 is formed in a circular and dish shape that is integrally formed of a heat resistant resin. A collecting wire 35 is wound around the annular protrusion 26 in the base 24 and stacked in a plurality of stages.

Reference numeral 36 denotes a thermosetting / heat resistant resin adhesive. The adhesive 36 penetrates into the gap between the assembly lines 35 stacked in the base 24. As a result, the assembly line 35 is solidified as a whole.
Reference numeral 24A denotes a rising portion. The rising portions 24 </ b> A are integrally formed with the base 24 at regular intervals around the base 24, for example, every 12 degrees. A step portion 24B is formed on the inner peripheral upper portion of the rising portion 24A. Further, the top 24 </ b> C of the rising portion 24 is in contact with the lower surface of the top plate 21.

Reference numeral 25 denotes a support portion. The support portions 25 are formed on the outer periphery of the base 24 so as to protrude in a tongue shape, for example, a total of four at the entire periphery. Reference numeral 28 denotes a support column that is positioned below the support portion 25 and stands from the partition plate 27. A coil spring 29 is placed so as to surround the support 28. The coil spring 29 is installed in a compressed state between the support portion 25 and the partition plate 27 so as to always push up the support portion 25 from below. For this reason, the top portion 24 </ b> C of the rising portion 24 </ b> A is pressed against the lower surface of the top plate 21 from below by the elastic force of the coil spring 29.
Reference numeral 273 denotes a seal body made of heat-resistant rubber or the like.

  Reference numeral 15 denotes a buoyancy suppression plate. The buoyancy suppression plate 15 has a size so as to cover the entire left IH heating coil 6LC from above, and is composed of one circular outer shape or two semicircular left-right symmetric shapes. In the second embodiment, the plate thickness is formed by punching from an aluminum plate having a thickness of 1 mm or less with a press. The buoyancy suppression plate 15 can be the same as that in the first embodiment.

The outer peripheral edge of the buoyancy suppression plate 15 is placed and held on the stepped portion 24B of the rising portion 24A of the base 24. That is, the step portion 24B of the rising portion 24A and the buoyancy suppression plate 15 come into contact with each other, and the buoyancy suppression plate 15 is positioned at a predetermined position.
As a result, a cooling air passage 39 having a predetermined gap dimension 274 is formed between the upper surface of the adhesive 36 covering the surface of the left IH heating coil 6RL and the lower surface of the buoyancy suppression plate 15. The cooling air passage 39 can improve the heat insulation between the buoyancy suppression plate 15 and the left IH heating coil 6LC. When the cooling air flows, the air flows as indicated by an arrow Y1. It is necessary for distribution.
It is not necessary to fix the buoyancy suppression plate 15 itself to the IH heating coils 6RC, 6LC side with screws, rivets or the like.
The cooling air passage 39 corresponds to the first gap in the present invention.

  31L is an infrared temperature detecting element. The temperature detection element 31L is installed inside the protrusion 26, and faces the light receiving portion 33L directly above the opening 32 formed at the center of the ceiling surface of the protrusion 26. Reference numeral 34L denotes a lead wire for the temperature detection element 31L.

In the process of assembling the induction heating cooking apparatus according to the second embodiment, first, the peripheral edge portion of the buoyancy suppression plate 15 is placed on the rising portion 24A of the base 24 located around the left IH heating coil 6LC. Thereby, the buoyancy suppression plate 15 is held at a predetermined position. Then, the seal body 273 is placed on the outermost peripheral edge portion of the buoyancy suppression plate 15.
When the top plate 21 is finally covered from above in this state, the lower surface of the top plate 21 comes into contact with the rising portion 24A of the base 24, and the entire left IH heating coil 6LC is pushed downward against the elastic force of the coil spring 29. Stops at a fixed position (the top plate portion B including the top plate 21 is fixed with a fixing tool such as a screw so as to close the upper surface opening 2SP of the main body case 2 of the cooking apparatus as described in the first embodiment).

Thus, the step 24B of the rising portion 24A of the base 24 and the buoyancy suppression plate 15 come into contact with each other, so that the buoyancy suppression plate 15 is positioned at a predetermined position and covers the surface of the left IH heating coil 6RL. Between the upper surface of 36 and the lower surface of the buoyancy suppression plate 15, a cooling air passage 39 having a predetermined gap dimension 274 is formed. Therefore, the cooling air Y1 can be circulated through the cooling air passage 39, the left IH heating coil 6LC can be cooled from above, and the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved. .
Moreover, the buoyancy suppression plate 15 can be cooled from above and below by the cooling air Y1, and the temperature rise of the buoyancy suppression plate 15 can be suppressed.
In addition, since the buoyancy suppression plate 15 is positioned by the rising portion 24A of the base 24, the buoyancy suppression plate 15 can be easily installed.

(Cooling structure)
In FIG. 19, 43 is a duct. The duct 43 is made of a resin or metal material. The duct 43 has a length (width) that extends both below the base 24 (see FIG. 20) of the right IH heating coil 6RC and below the base (see FIG. 21) of the left IH heating coil 6LC. It is installed on the partition plate 27.
43R is the right end of the duct 43. The right end 43R is fixed to the inner side of the body 2A of the body case 2 with screws or the like. 43L is the left end of the duct 43. The left end 43L is fixed to the inner side of the body 2A of the body case 2 with screws or the like.
The duct 43 is installed corresponding to an intermediate portion HP (see FIG. 18) in the front-rear direction of the main body case 2.

Usually, the person (installer) who installs the cooking apparatus normally installs the cooking apparatus by one person when installing the kitchen apparatus on the kitchen furniture KT. Lifting with both hands. In this case, the left and right flanges 3 </ b> L and 3 </ b> R of the trunk 2 </ b> A of the main body case 2 are the handle portions.
In the second embodiment, the duct 43 is connected from the right flange 3R to the left flange 3L in anticipation of preventing the sheet metal body case 2 from being inadvertently deformed during such installation work. Since the duct 43 connects the left and right upper portions of the body portion 2A, the strength of the body portion 2A is improved so that the body portion 2A does not deform even if it is compressed from the left and right.

  The duct 43 is formed with a central vent 45 corresponding to the opening 44 formed in the partition plate 27 and a plurality of vents 46 around it. Therefore, a part of the cooling air Y2 pushed into the duct 43 from the opening 44 is distributed to a predetermined position of the right IH heating coil 6RC, and the remaining air is guided to below the left IH heating coil 6LC. Then, as shown by an arrow Y7 in FIG. 18, the right IH heating coil 6RC and the left IH heating coil 6LC are cooled, then flow toward the rear exhaust chamber 12, and finally discharged from the main body A.

  In FIG. 19, reference numerals 152 and 153 denote a pair of left and right substrate support tables. A right-mounted circuit board 150R and a left-mounted circuit board 150L are respectively installed on support plates 261A, 261B in which the two board support tables 152, 153 are connected at two positions. As a result, the inside of the electrical component chamber 8 is surrounded by the board support bases 152 and 153 on the left and right sides, the air passage 154 having the ceiling surface formed by the support plate 261A, and the board support bases 152 and 153 on the left and right sides. An air passage 155 extending in the front-rear direction and having a ceiling surface formed by the partition plate 27 itself is formed.

  And the blower outlet of the air blower case of the air blower 57 (refer FIG. 5) is facing the rear part of these two independent air passages 154 and 155, and the cooling air from the air blower 57 is sent to the two air passages 154 and 155. It comes to supply.

  Reference numeral 263 denotes a metal horizontal partition plate. The horizontal partition plate 263 divides the electrical component chamber 8 inside the housing C and blocks the roaster heating chamber 9 from the electrical component chamber 8. And the upper end part of the horizontal partition plate 263 is joined to the lower surface of the metal partition plate 27 installed horizontally, and the lower end part is joined to the bottom surface of the trunk portion 2 </ b> A of the main body case 2.

Reference numeral 263A denotes one or more ventilation holes formed in the lower part of the horizontal partition plate 263.
H.264R is a metal right partition plate. The right partition plate 264R is vertically installed on the right wall surface of the roaster heating chamber 9 so as to face each other with a minute gap of about several mm. Reference numeral 264L denotes a metal left partition plate. The left partition plate 264L is vertically installed on the left wall surface of the roaster heating chamber 9 so as to face each other with a minute gap of about several mm.
In the second embodiment, the wall surface of the roaster heating chamber 9 is not a double structure, but the minute gap between the right partition plate 264R and the left partition plate 264L is cooked in the roaster heating chamber 9. In this case, it acts as a heat insulation space by a kind of air layer.

(Operation)
During cooking in the roaster heating chamber 9 by the right IH heating source 6R, the left IH heating source 6L, the central heating source 7 or the heaters 22 and 23, the cooling air supplied from the blower 57 (see FIG. 5) to the air paths 154 and 155. However, after passing around the various electrical components mounted on the mounting circuit boards 150R and 150L and the heat dissipating fins 151R and 151L and cooling them, the right partition plate 264R passes through the ventilation hole 263A as indicated by an arrow Y6. And a space 266 formed between the horizontal partition plate 263 and the horizontal partition plate 263. This space 266 communicates with the exhaust chamber 12 (see FIG. 18) at the rear of the roaster heating chamber 9, and is finally discharged to the outside of the casing C. 265R is a space formed between the inner side wall surface of the body portion 2A of the main body case 2 on the outside of the right substrate support base 153. Similarly, 265 </ b> L is a space formed between the left side substrate support base 152 and the horizontal partition plate 263.

As described above, in the present embodiment, the cooling air passage 39 is formed radially around the protrusion 26 by the rib 37 formed on the upper surface of the right IH heating coil 6RC. A minute gap 272 is formed by the protrusions 38 </ b> A and 38 </ b> B formed on the rib 37. For this reason, it is possible to effectively flow the cooling air Y1 from the center of the cooling air passage 39 and the minute gap 272.
With this cooling air Y1, the right IH heating coil 6RC can be cooled from above, and the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved.
Further, since the minute gap 272 is formed, the buoyancy suppression plate 15 can be cooled from above and below by the cooling air Y1, and the temperature rise of the buoyancy suppression plate 15 can be suppressed.
Further, since the buoyancy suppression plate 15 is positioned by the projections 38A and 38B of the rib 37, the buoyancy suppression plate 15 can be easily installed.

Further, the step 24B of the rising portion 24A of the base 24 and the buoyancy suppression plate 15 come into contact with each other so that the buoyancy suppression plate 15 is positioned at a predetermined position and covers the surface of the left IH heating coil 6RL. A cooling air passage 39 having a predetermined gap dimension 274 is formed between the upper surface and the lower surface of the buoyancy suppression plate 15. Therefore, the cooling air Y1 can be circulated through the cooling air passage 39, the left IH heating coil 6LC can be cooled from above, and the cooling efficiency of the right IH heating coil 6RC that becomes high temperature when energized can be improved. .
Moreover, the buoyancy suppression plate 15 can be cooled from above and below by the cooling air Y1, and the temperature rise of the buoyancy suppression plate 15 can be suppressed.
In addition, since the buoyancy suppression plate 15 is positioned by the rising portion 24A of the base 24, the buoyancy suppression plate 15 can be easily installed.

  A cooling air passage 39 is formed along the longitudinal direction of the rib 37 above the assembly line 35 of the heating coils 6RC and 6LC. The partition plate 27 corresponding to the ceiling surface of the electrical component chamber 8 has an opening 44, and the duct 43 has a central vent 45 and a plurality of vents 46 around the duct 43 corresponding to the opening 44. Therefore, a part of the cooling wind Y2 pushed into the duct 43 from the opening 44 is first distributed to a predetermined position of the right IH heating coil 6RC, and the remaining wind reaches under the left IH heating coil 6LC. Be guided. Then, the left IH heating coil 6LC is cooled from below as indicated by an arrow Y2 in FIG. The cooled air finally reaches the exhaust chamber 12 and is discharged from the main body A.

That is, in the second embodiment, the strength of the thin sheet metal body case 2 is improved by using the duct 43 that concentrates on the heating coils 6RC and 6LC and guides the cooling air.
Further, the rib 37 secures a cooling air passage 39 having a predetermined size between the heating coils 6RC and 6LC and the buoyancy restraining plate 15, and a minute amount between the buoyancy restraining plate 15 and the lower surface of the top plate 21. It is possible to prevent the buoyancy suppression plate 15 from being adversely affected by the temperature of the top plate 21 that is secured by the air gap and is heated by heat conduction from the heated object N.

  The induction heating cooking apparatus of the present invention can easily install a buoyancy suppression plate, and can also suppress the temperature rise of the buoyancy suppression plate, so that it is possible to cook with a pan made of various materials while ensuring convenience. The rise can also be suppressed with a simple configuration, and can be widely used in stationary cookers or built-in cookers dedicated to induction heating type heat sources and combined type cookers with other radiant type heat sources.

3 is an exploded perspective view showing the induction heating cooking apparatus main body according to Embodiment 1. FIG. It is a perspective view which shows the top-plate part which concerns on Embodiment 1, and the whole main-body part. FIG. 3 is a plan view of a part of the front of the main body according to the first embodiment. 4 is a plan view of the entire main body according to Embodiment 1. FIG. FIG. 3 is a longitudinal sectional view at a right half side position of the main body according to the first embodiment. 4 is a longitudinal sectional view showing an induction heating coil portion according to Embodiment 1. FIG. It is a principal part perspective view which fractures | ruptures and shows the induction heating coil part of the right side concerning Embodiment 1 vertically. It is a principal part perspective view which fractures | ruptures and shows the induction heating coil part of the left side concerning Embodiment 1 vertically. 3 is a longitudinal sectional view at a left half side position of a main body according to Embodiment 1. FIG. FIG. 3 is a configuration diagram of a control circuit according to the first embodiment. It is a partial cross section explanatory view showing the middle of the installation process of the cooking device concerning Embodiment 1. 3 is an exploded perspective view showing a housing part and a top plate part of the main body case according to Embodiment 1. FIG. 3 is an exploded perspective view showing a housing part of the main body case according to Embodiment 1. FIG. It is a longitudinal cross-sectional view which shows the upper surface operation part which concerns on Embodiment 1, and the edge part of a top-plate part. FIG. 5 is a partially omitted perspective view for explaining a mounting state of a board on which a pressing operation type switch of the upper surface operation unit and the electronic component element 252 according to the first embodiment are mounted. 3 is a longitudinal sectional view showing an end portion of a top plate portion according to Embodiment 1. FIG. 2 is a plan view of a buoyancy suppression plate according to Embodiment 1. FIG. It is a top view of the whole induction heating cooking apparatus which concerns on Embodiment 2. FIG. 6 is a longitudinal sectional view of an induction heating coil portion according to Embodiment 2. FIG. 6 is an enlarged longitudinal sectional view showing a part of a right induction heating coil according to Embodiment 2. FIG. 6 is an enlarged longitudinal sectional view showing a part of a left induction heating coil according to Embodiment 2. FIG.

Explanation of symbols

  A body part, B top plate part, C housing part, D heating means, E operation means, F control means, G display means, BB adhesive, DL metal rail, FB base, FF fixed end, FP protection part , FR protective member, FL protective member, FT presser part, HP intermediate part, K1 installation port, KS space, KT kitchen furniture, KTK opening part, KTS installation space, N heated object, PK sealing material, S1 micro gap, S2 Space, S3 space, SC1 fixing means, SC3 fixing means, SC4 fixing means, SP space, 1 body, 2 body case, 2A body, 2B front flange plate, 2S inclined surface, 2SP upper surface opening, 2T flange, 2T1 folding Curved part, 3A flange, 3B flange, 3L flange, 3R flange, 6L left IH heating source, 6LC left IH heating coil, 6LC1 inner core 6LC2 outer coil, 6LM guidance mark, 6R right IH heating source, 6RC right IH heating coil, 6RC1 inner coil, 6RC2 outer coil, 6RL heating coil, 6RM guidance mark, 7 central heating source, 7M guidance mark, 8 electrical components Chamber, 9 Roaster heating chamber, 10 Upper part chamber, 11 Intake chamber, 12 Exhaust chamber, 13 Door, 14 Exhaust duct, 15 Buoyancy suppression plate, 15A Right half, 15B Left half, 15C Opening, 15D Slit, 15E Through hole, 15F Through hole, 15G Comb, 15H Base, 15S Opposite spacing, 15T teeth, 15X center, 15Y circulatory current, 15Y arrow, 15Z circulator current, 20 upper frame, 20A opening, 20B Right vent, 20C Central ventilation opening, 20D Left ventilation opening, 20E Through-hole, 20EG Edge part, 20 Fixing part, 21 Top plate, 22 Heater, 23 Heater, 24 Base, 24A Rising part, 24B Step part, 24C Top part, 25 Support part, 26 Projection part, 27 Partition plate, 28 Post, 29 Coil spring, 30 Ventilation hole, 31 Temperature detection element, 31L Temperature detection element, 31R Temperature detection element, 32 aperture, 33L light receiving part, 33R light receiving part, 34L lead wire, 35 collecting line, 36 adhesive, 37 rib, 38 protrusion, 38A protrusion, 38B protrusion, 39 Cooling air channel, 40R Right fire power indicator lamp, 41 Cavity, 42 Magnetic flux leakage prevention material, 43 Duct, 43L Left end, 43R Right end, 44 Opening, 45 Vent, 46 Vent, 50 Container cover, 51 Upper and lower partitions Plate, 52 space, 53 Rear partition plate, 54 Blower case, 55 Duct, 55A Inlet, 5 Air outlet, 57 Blower, 57A Wing, 58 Fan, 59 Motor, 59A Partition plate, 60 Front operation unit, 61 Top operation unit, 62 Front operation frame, 63 Main power switch, 63A Operation button, 64L Left operation dial, 64R Right operation dial, 65 Central operation dial, 66 Timer dial, 66L Left indicator lamp, 66R Right indicator lamp, 70 Right thermal power setting operation section, 71 Left thermal power setting operation section, 72 Central operation section, 73 Right one-touch key section , 82 Left one-touch key part, 74 Low thermal power key, 75 Medium thermal power key, 76 High thermal power key, 77 3KW key, 78 Low thermal power key, 79 Medium thermal power key, 80 High thermal power key, 81 3KW key, 90 Operation button, 91 Operation buttons, 92 operation buttons, 94 switch buttons, 95 convenient menu keys, 96 convenient menus New button, 97R Right timer switch, 98L Left liquid crystal display, 98R Right liquid crystal display, 99R Object selection switch, 100 Integrated display means, 101L Left thermal power display lamp, 101R Right thermal power display lamp, 102 Information key, 105 Front opening , 106 Window plate, 107 Central opening, 108 Sauce pan, 109 Burning net, 110 Packing, 111 Inner frame, 112 opening, 113 gap, 114 gap, 115 Outer frame, 116 Exhaust port, 118 Upper end opening, 119 Rear exhaust port , 120 Deodorizing catalyst, 120H catalyst heater, 120W thermal power, 121 rear frame, 122 rear frame, 122R vent, 122L vent, 123 front frame, 123A through hole, 130 cover, 140 vent, 141 front partition Board, 142A installation section, 142B installation section 143 Air gap, 144 Vertical wall, 145 Air gap, 150L Left mounting circuit board, 150R Right mounting circuit board, 151L Heat radiation fin, 151R Heat radiation fin, 152 Board support base, 153 Board support base, 154 Air path, 155 Air path, 160 Auxiliary Cooling fan, 161 motor, 162 partition, 163 internal space, 164 ventilation hole, 165 ventilation hole, 170 bottom, 171 exhaust and ventilation hole, 172 guide plate, 173 corrosion resistant metal container, 174 support base, 200 energization control circuit, 201 input , 202 output unit, 203 storage unit, 204 arithmetic control unit, 206R right heating source circuit, 210L inverter circuit of left IH heating source 6L, 210R inverter circuit of right IH heating source 6R, 211 heater driving circuit of central heating source 7 212 Heater drive circuit, 213 Heater Moving circuit, 214 heater driving circuit, 215 driving circuit for driving liquid crystal screen, 221 rectifier circuit, 222 coil, 223 smoothing capacitor, 224 resonance capacitor, 225 IGBT, 226 flywheel diode, 227 current detection sensor, 228 driving circuit, 230 drive circuit, 231 motor drive circuit, 240 temperature detection circuit, 241 temperature detection element, 242 temperature detection element for internal temperature detection, 243 temperature detection element, 244 temperature detection element, 245 temperature detection element, 250 substrate case, 251 switch 252 Electronic component element, 253 substrate, 254 push button case, 254A push button, 255 membrane sheet, 255A push button support piece, 256R support piece, 256L support piece, 257 elastic body, 259 hanging part, 260 Ventilation hole, 261A support plate, 263 horizontal partition plate, 263A hole, 264L left partition plate, 264R right partition plate, 266 space, 270 adhesive, 271 opening, 272 micro gap, 273 seal body, 274 gap size.

Claims (8)

The body,
A top plate covering the top of the body;
An induction heating coil disposed below the top plate;
A buoyancy suppression plate provided between the top plate and the induction heating coil and formed of a conductor;
Holding means for holding at least the induction heating coil;
Air supply means for supplying cooling air to the inside of the main body,
The buoyancy suppression plate is positioned at a predetermined position by the holding means, and a first gap is provided between at least one of the induction heating coil and the buoyancy suppression plate and between the buoyancy suppression plate and the top plate. An induction heating cooking device characterized by being formed.   The induction heating cooking apparatus according to claim 1, wherein cooling air supplied from the blowing means is introduced into the first gap to cool at least the buoyancy suppression plate. The induction heating coil includes an inner coil and an outer coil disposed concentrically with the inner coil;
The induction heating cooking apparatus according to claim 1 or 2, wherein a second gap is formed between the inner coil and the outer coil.   The induction heating cooking according to claim 3, wherein cooling air supplied from the blowing means is introduced into the first and second gaps, and the buoyancy suppression plate and the induction heating coil are cooled. apparatus. The holding means includes a rib disposed between the buoyancy suppression plate and the induction heating coil,
The induction heating cooking apparatus according to any one of claims 1 to 4, wherein an upper portion of the rib and a lower surface of the buoyancy suppression plate abut, and the buoyancy suppression plate is positioned at a predetermined position. The rib is
A first protrusion formed to protrude upward;
A second protrusion that protrudes upward and has a lower height than the first protrusion,
The upper end portion of the first protrusion and the lower surface of the top plate are in contact, the upper end portion of the second protrusion and the lower surface of the buoyancy suppression plate are in contact, and the induction heating coil and the buoyancy suppression plate are The induction heating cooking apparatus according to claim 5, wherein the first gap is formed between the buoyancy suppression plate and the top plate.   The induction heating cooking apparatus according to claim 5 or 6, wherein the rib is integrally formed on an upper surface of the induction heating coil by a resin adhesive that fixes the assembly wires of the induction heating coil. The holding means includes a base body disposed below the induction heating coil and supporting the induction heating coil,
The base body has a rising portion formed to protrude upward,
The induction heating cooking apparatus according to any one of claims 1 to 4, wherein an upper portion of the rising portion and the buoyancy suppression plate abut against each other so that the buoyancy suppression plate is positioned at a predetermined position.

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