JP5425171B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device, and more particularly to a cooking device that performs cooking using an electric heating source or an electromagnetic induction heating source.

As a heating cooker, an electromagnetic heating cooker that heats food placed on the upper surface of one main body (housing) with a plurality of electromagnetic induction heating sources, or radiation from an electric heater in addition to the electromagnetic induction heating source There is an electromagnetic heating cooker (so-called composite heating cooker) that can be heated by a mold heating source.
And it has an operation part for controlling a plurality of heating sources, and a display part which displays an operation state or a set state, and the display part protrudes one step near the front surface of the top plate and the front surface is inclined. A cooking device covered with a display cover is disclosed (for example, see Patent Document 1).

JP 2002-349878 (page 2-3, FIG. 2)

However, as in the invention disclosed in Patent Document 1, the conventional cooking device has two heating means (the same as the heating source), and for example, there are as many as five, so they are individually controlled. In this case, it is necessary to adjust a plurality of operation units such as input switches and heating power control knobs of each heating means. In addition, since the result of such adjustment is individually displayed on a plurality of display units by liquid crystal, lamps, characters, etc., it is necessary to check the states separately.
And each time a heat source, such as a heating power, heating temperature, time, etc. are displayed on a liquid crystal screen with a small area by a display means such as numbers or lamp display, etc. In particular, there is a problem that it is difficult to easily check the setting conditions of each heating source.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a cooking device capable of easily confirming setting conditions and the like of each of a plurality of heating sources.

A heating cooker according to the present invention includes a main body including a top plate on which an object to be heated is placed, and a left heating coil and a right heating coil respectively installed at a left position and a right position of a space below the top plate. Induction heating means, control means for controlling cooking conditions of the plurality of heating means, input means having a plurality of input keys for inputting the cooking conditions to the control means, and input by the input keys of the input means Display means for displaying the cooking conditions, a part of the display means enters the space between the left heating coil and the right heating coil, and is visible from above the main body, When both the left heating coil and the right heating coil are induction-heated, the cooking condition of the left heating coil and the cooking condition of the right heating coil are respectively set to the left position and the right of the display means. The left position of the display means displays a first display area for displaying the first condition setting state of the left heating coil and a setting state of the second condition of the left heating coil. It comprises two areas of the second display area, the right position of the display means is a first display area for displaying the first condition setting state of the right heating coil and the setting of the second condition of the right heating coil It has two areas of a second display area for displaying the state, and the area and shape of each of the areas can be changed, and the input key is used for cooking conditions of the left heating coil and cooking of the right heating coil. Near the front surface of the main body than the left position and the right position where conditions are displayed simultaneously, and on the upper surface of the display means or the upper surface of the main body closer to the front surface, Are arranged side by side in the right direction, further, a guide area for displaying a note or reference information in various cooking by the character, the first display area and the left heating coil for displaying a first condition setting state of the left heating coil first A second display area that displays a setting state of two conditions, a first display area that displays a first condition setting state of the right heating coil, and a second that displays a setting state of the second condition of the right heating coil The guide area is displayed in a horizontally long shape with a predetermined area at a predetermined position closer to the input key than the display area, and the guide area is in either of the left heating coil and the right heating coil in the simultaneous heating state or one of the input states In any case, the predetermined area is maintained at a predetermined area, and the display means is disposed near the front surface of the main body, and the left heating Crossing a straight line connecting the front surface of the coil and the front surface of the right heating coil, the liquid crystal display substrate has a square or rectangular outer shape in plan view, and the left heating coil and the right heating coil are outer shapes in plan view. There, characterized in that an induction heating source is circular.

  Since the present invention is configured as described above, in the cooking device that can handle various types of cooking, the setting status of various cooking conditions can be checked each time by looking at a common display screen, and the display screen is Because it is located between the heating means so as to be sandwiched between the heating means, prepare a large display screen common to each heating source in the upper plate of the limited area (same as the top plate) Can do. Therefore, since a lot of information can be displayed on a large display screen, the visibility when the user operates is improved.

The whole perspective view which shows the heating cooker which concerns on Embodiment 1 of this invention. The top view of the heating cooker shown in FIG. The cross-sectional view (the 1) of the heating cooker shown in FIG. The cross-sectional view of the heating cooker shown in FIG. 2 (part 2). The principal part top view which shows the center display and input part periphery of the heating cooker shown in FIG. The electric circuit block diagram in the heating cooker shown in FIG. The top view of the center display and input part and upper surface operation part of the main body of the heating cooker shown in FIG. The schematic diagram which shows the display area division of the center display and input part of the heating cooker shown in FIG. Explanatory drawing (1) which shows the relationship between the display screen of the heating cooker shown in FIG. 1, and an input key. Explanatory drawing (2) of the relationship between the display screen of the heating cooker shown in FIG. 1, and an input key. Explanatory drawing (3) of the relationship between the display screen of a heating cooker shown in FIG. 1, and an input key. Explanatory drawing which shows the relationship between the display screen of the heating cooker which concerns on Embodiment 2 of this invention, and an input key.

[Embodiment 1]
FIGS. 1-11 shows the heating cooker which concerns on Embodiment 1 of this invention, Comprising: FIG. 1 is the whole perspective view in the installation state of a heating cooker, FIG. 2 is the whole top view, 3 is a cross-sectional view of the whole, FIG. 4 is a cross-sectional view at a position further below the cross-sectional position of FIG. 3, FIG. 5 is an upper vertical cross-sectional view of the front of the main body, FIG. 7 is a plan view of the main part showing the upper surface operation unit and the periphery of the central display / input unit, FIG. 8 is an explanatory diagram showing the screen of the central display / input unit, and FIG. 9 shows the upper surface operation unit and the central display / input unit. FIG. 10 is a plan view showing the upper surface operation unit and the central display / input unit, and FIG. 11 is a plan view showing the upper surface operation unit and the central display / input unit. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and a part of the description is omitted.

(Heat cooker body)
In FIG. 1, a heating cooker main body (hereinafter referred to as “main body”) 1 has a rectangular planar shape, a box-shaped main body case 2 formed of a metal plate, and a metal that blocks an upper surface opening of the main body case 2. It is comprised from the frame-shaped top plate 3 formed from the steel plate.
Inside the main body 1, heating means 6L, 6R, 7 to be described later for generating electromagnetic energy or heat energy for heating an object to be heated placed on the top board 3, and cooking conditions of the heating means are controlled. Control means 200 described later, input means 20 to 23 described later for inputting the cooking conditions to the control means, and display means (characteristic of the present invention) 80 for displaying the cooking conditions input to the input means It has. Hereinafter, each will be described in detail.

(Top board)
The top surface of the top plate 3 is bordered by a frame-shaped frame 4 formed of a nonmagnetic stainless steel plate or aluminum plate, and a large opening provided in the center thereof is an infrared ray such as heat-resistant tempered glass or crystallized glass. Is covered in a sealed state by a rectangular top plate (same as the upper plate) 5 made of a material that transmits light. Therefore, water droplets or the like from the upper surface of the top plate 5 are prevented from entering the inside of the main body 1 through the frame body 4.
On the upper surface of the top plate 5, guide marks 6LM, 6RM, and 7M indicating the positions of heating sources 6L, 6R, and 7 to be described later are respectively displayed.

(Right heating source)
A right electromagnetic heating coil (hereinafter referred to as “right heating source”) 6 </ b> R is disposed inside the main body 1 and on the lower surface side of the top plate 5 at the right side position. The upper end portion of the right heating source 6R is close to the top plate 5 and serves as an electromagnetic induction heating source. For example, the one having the capacity of maximum power consumption (maximum heating power) of 3 kW is used. The right heating source 6R is formed in a disc shape so that one or a plurality of induction heating coils (hereinafter referred to as “right heating coils”) 220R are spirally wound and the outer shape is circular. The diameter (maximum outer diameter dimension) of the right heating coil 220R is about 180 mm.
A guide mark 6RM, which is a circle (a broken line in FIG. 1 and a solid line in FIG. 2) displayed on the top plate 5 at a position corresponding to the upper side of the right heating source 6R, does not indicate the outer position of the right heating source 6R. It shows an appropriate induction heating area, and is formed by printing or the like.

(Left heating source)
A left electromagnetic heating coil (hereinafter referred to as “left heating source”) 6 </ b> L is disposed inside the main body 1 and on the lower surface side of the left side position of the top plate 5. The upper end portion of the left heating source 6L is close to the top plate 5 and serves as an electromagnetic induction heating source. For example, a device having a maximum power consumption (maximum heating power) of 2.5 kW is used. The left heating source 6L is formed in a disk shape so that one or more induction heating coils (hereinafter referred to as “left heating coil”) 220L are wound in a spiral shape and the outer shape is circular. The left heating coil 220L has a diameter (maximum outer diameter dimension) of about 180 mm, but can be formed to about 170 mm because it is smaller than the maximum heating power of the right heating coil 220R.
A guide mark 6LM which is a circle (a broken line in FIG. 1 and a solid line in FIG. 2) displayed on the top plate 5 at a position corresponding to the upper side of the left heating source 6L does not indicate the outer position of the right heating source 6RL. It shows an appropriate induction heating area, and is formed by printing or the like.

The left heating source 6L and the right heating source 6R are electrically connected to an energization control circuit 200 which will be described later so that energization and the amount of electric power thereof are controlled independently, and the heating power can be set separately.
As shown in FIGS. 3, 5, and 6, the left heating source 6 </ b> L and the right heating source 6 </ b> R are both a left heating coil 220 </ b> L and a right heating coil 220 </ b> R that are spirally wound so as to generate an eddy current when energized. The left magnetic flux leakage of the left holding frame 335L and the right holding frame 335R housing the left heating coil 220L and the right heating coil 220R, and the ferrite plate covering the whole lower surface of the left holding frame 335L and the right holding frame 335R or a part thereof. It is configured by a prevention plate 331L, a right magnetic flux leakage prevention plate 331R, and the like.
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 on the left and right.

  The holding frame 335 is a metal container having a circular shape with an open top surface, and a large number of ventilation holes 330P are provided on the peripheral wall surface so that cooling air can pass therethrough. The holding frame 335 is installed such that the edge of the upper surface opening is in contact with the lower surface of the top plate 5 via the heat insulating material 332, and the upper surface of the heating coil 220 is opposed to the lower surface of the top plate 5 with a certain minute gap. It is installed to do.

(Central heating source)
A central heating source 7 is arranged inside the main body 1 on the left and right center line of the top plate 5 (indicated by the alternate long and short dash line CL in FIGS. 2 and 3) and closer to the rear part of the top plate 5. Has been. The central heating source 7 uses an electric heater 231 (for example, a nichrome wire, a halogen heater, or a radiant heater) of a type that is heated by radiation, and a cooking device (not shown) such as a pan placed above the top plate 5 through the top plate 5. ) Is heated. And, for example, the one having the capacity of maximum power consumption (maximum heating power) 1.2 kW is used.

The electric heater 231 is accommodated in the heat insulating cover 7A. The heat insulating cover 7A has a circular container shape with the entire upper surface opened. The heat insulating cover 7A has a diameter (maximum outer diameter) of about 180 mm and a plate thickness of 5 mm.
A guide mark 7M, which is a circle (a broken line in FIG. 1 and a solid line in FIG. 2) displayed on the top plate 5 at a position corresponding to the upper side of the central heating source 7, does not indicate the outer position of the central heating source 7. It shows an appropriate induction heating area, and is formed by printing or the like.

(Front operation unit)
A front operation unit 10 is provided on the right front surface of the main body case 2. The front operation unit 10 includes a left heating source 6L, a right heating source 6R, a central heating source 7, and all power sources for an electric heater 110A for oven cooking and grill cooking (refer to FIG. 5, hereinafter referred to as “grill heater”). The operation button 11 of the main power switch 201 (see FIG. 6) that turns on and off all at once and the electrical contacts of the control switch (not shown) that controls the energization of the right heating source 6R and the energization amount (thermal power) are opened and closed. The right operation dial 12R, the left operation dial 12L of the left control switch 12 (not shown) for controlling the energization of the left heating source 6L and the energization amount (thermal power), and the energization of the central heating source 7 and the energization amount thereof. A central operation dial 13 of a control switch (not shown) for controlling (thermal power) is provided.
The front operation unit 10 is energized to the left heating lamp 6L by the left operation dial 12L, and the left operation lamp 12R is lit only when the left heating source 6L is energized. And a right indicator lamp 14 that is lit only when it is in the closed state.

In addition, the left operation dial 12L, the right operation dial 12R, and the central operation dial 13 are pushed inward so as not to protrude from the surface of the front operation unit 10, as shown in FIG. In use, when the user presses once with a finger, the user protrudes forward by a spring force and can be turned. At this stage, the left heating source 6L, the right heating source 6R, and the central heating source 7 are energized.
Therefore, if any of the protruding left operation dial 12L, right operation dial 12R, or central operation dial 13 is turned to the left or right, the energization amount of the heating source is determined according to the amount of rotation, and the heating power can be set. It is like that.

  Further, timer dials 16, 17, and 18 are provided in the lower part of the front operation unit. The timer dials 16, 17, and 18 energize the left heating source 6L, the right heating source 6R, and the central heating source 7 for a desired time from the start of energization, and automatically turn off the power after the desired time has elapsed. This is for operating a timer switch (not shown).

(Grill room)
In the lower half of the inside of the main body 1, a compartment-formed grill chamber (hereinafter referred to as “heating chamber”) 19 is provided. The heating chamber 19 is formed of metal plates on the left, right, top, bottom, and back walls, and roasted cooking (for example, grilled fish) by simultaneously or individually energizing electric heaters (not shown) installed near the top and bottom. ), Grill cooking (for example, pizza or gratin), and oven cooking (for example, cake or grilled vegetables) in which the atmosphere temperature in the heating chamber 19 is set. For example, a grill heater 110A (see FIG. 5) with a maximum power consumption (maximum thermal power) of 1200 W is provided near the top ceiling, and an electric heater (not shown) with a maximum power consumption of 800 W is provided near the bottom.

  The front opening 71 of the heating chamber 19 is covered by a door 70 so as to be opened and closed, and the door 70 is held in the heating chamber 19 by a support mechanism (not shown) so as to be movable in the front-rear direction. Further, the central opening of the door 70 is formed of heat-resistant glass and a window 72 is installed so that the inside of the heating chamber 19 can be visually recognized. Further, the door 70 is provided with a metal tray 73 integrally formed. When cooking with a lot of oil, a metal grill (not shown) is usually placed on the tray 73.

  A right exhaust port 74 is provided on the upper surface of the rear central portion of the frame body 4, and the surface is covered with punching metal, a net, and a fine grid so that a user's finger or foreign matter does not enter. The right exhaust port 74 communicates with the inside of the heating chamber 19 via the exhaust duct 76, and high-temperature air (including oily smoke generated from the cooked food) generated in the heating chamber 19 flows from the right exhaust port 74 to the main body 1. Is discharged outside.

  Further, a left exhaust port 75 is provided on the upper center surface of the rear portion of the frame body 4, and the surface is covered with punching metal, a net, and a fine grid so that a user's finger or a foreign object does not enter. The left exhaust port 75 communicates with an internal space (an upper space 275 described later) of the main body 1.

(Top operation section)
An upper surface operation unit 20 is disposed on the upper surface of the top plate 3, specifically, the front portion of the frame body 4. A left heating power setting operation unit 22 of the left heating source 6L is installed on the left side of the left and right center line CL (see FIGS. 1 and 2) of the main body 1, and the central heating source 7 and the heating chamber are installed in the center. A central operation unit 23 of the electric heater (not shown) is arranged on the right side, and a right heating power setting operation unit 21 of the right heating source 6R is arranged on the right side.

(Left thermal power setting operation section)
In FIG. 7, the right heating power setting operation unit 21 is provided with a right one-touch key unit 24 that can easily set the heating power of the right heating source 6 </ b> R only by pressing once by the user. The right one-touch key section 24 includes three one-touch keys, a low heat key 25, a medium heat key 26, and a strong heat key 27. For example, the weak heating power key sets the heating power of the right heating source 6R to 300 W, the middle heating power key 26 is set to 750 W, and the strong heating power key is set to 2.5 kW. Further, a strong heating power key (hereinafter referred to as “3 kW key”) 86 is provided at the right end portion of the right one-touch key portion 24, and when it is desired to increase the heating power of the right heating source 6R (for example, 3 kW), a pressing operation is performed. To do.

(Right heating power setting operation section)
The left heating power setting operation unit 22 for setting the heating power of the left heating source 6L is provided with a one-touch key similar to the right heating power setting operation unit 21 (the right one-touch key unit 24 is installed). Yes. Therefore, for example, the thermal power can be set to 300 W, 750 W, or 2.5 kW.

(Central control unit)
As shown in FIG. 7, the central operation unit 23 includes an operation button 92 of an operation switch (not shown) for starting energization of a grill heater 110A used for roast cooking, oven cooking, and grill cooking, and the energization thereof. Operation buttons 29 of operation switches (not shown) for stopping the operation are provided side by side.
Further, the central operation unit 23 is provided with a temperature adjustment switch (see FIG. 5) for setting the control temperature in the grill cooking by the grill heater 110A or the like and the electromagnetic cooking by the left heating source 6L and the right heating source 6R one by one in an additive or subtractive manner. Operation buttons 300 and 310 (not shown) are provided in a horizontal row.

  Furthermore, a convenient menu key 93 is provided in the central operation unit 23. In other words, deep-fried food cooking (left heating source 6L and right heating source 6R are used), deep-fried food preheating status display (left heating source 6L and right heating source 6R are used to heat oil to a predetermined preheating temperature), timer cooking (left When the heating source 6L, the right heating source 6R, the central heating source 7, the two grill heaters 110A provided in the heating chamber 19 are energized only during the time set by the timer counter and set) For example, a desired input screen or status display screen can be easily read on the central display / input unit 80 (referred to as the liquid crystal display unit 80 in FIG. 6).

Further, an operation button 94 of a control switch (not shown) for operating on / off of the power source of the central heating source 7 is provided.
Further, a right IH convenient menu button 93a including a hard button is provided on the right side of the operation button 29. This is a setting button for performing various settings for the right heating source 6R. A similar setting button is also provided for the left heating source 6L (not shown).

  Reference numeral 34R denotes a start switch (hereinafter referred to as “timer switch”) for starting a timer counter (not shown), which is provided at the right end of the operation unit 21. When the user presses it once, The time is measured and the elapsed time is obtained by transmitting the display light to the right liquid crystal display unit 35R (located near the lower surface of the top plate 5 and above the top plate 5) provided at the right front corner of the top plate 5. Is displayed in units of “minutes” and “seconds”.

  Similarly, a right-fried food selection switch 36R is provided in the operation unit 21, and when the user presses it once, the temperature of the oil in the fried food (tempura) pan by the right heating source 6R can be initialized to 180 ° C., and then The user can set the heating power of the right heating source 6R to any appropriate temperature suitable for fried food, for example, 200 ° C., by operating the right operation dial 12R.

  Similarly to the right heating power setting operation unit 21, the left heating power setting operation unit 22 on the left side includes a left timer switch 34L, a left liquid crystal display unit 35L (see FIG. 1), and a left fried food selection switch 36L. One is provided. The left timer switch 34L and the right timer switch 34R, the left liquid crystal display unit 35L and the right liquid crystal display unit 35R, the left deep-fried food selection switch 36L, and the right deep-fried food selection switch 36R sandwich the left and right center line CL of the main body 1, respectively. It is provided at the right and left target positions.

  In FIG. 7, the above-described six various operation buttons 29, 92, 93, 94, 300, 310, 93a and the like are covered with a thin resin film or metal film of a material that can withstand water or oil of cooking food. It is configured to operate (the built-in electrical contact is conducted and an input signal is generated) when the user presses lightly with a fingertip.

  Further, as shown in FIG. 7, an input key group 91 is provided. This key group is provided with six independently operable input keys 83, 95, 96, 97, 98, 99. These keys are made of a thin resin film or metal whose surface is completely cut off from cooking oil. It is covered with a film, and is configured to operate (a built-in electrical contact is conducted and an input signal is generated) when the user presses lightly with a fingertip.

  As described above, the reason why the contact type input keys (for example, introduced in Japanese Patent No. 2712399) are not used as the operation buttons and input keys of the central operation unit 23 is that such contact type keys are This is a type of heating that takes into account situations such as splashing of water or oil during cooking or when the user operates with wet hands, because an input signal is generated by detecting a change in capacitance. This is because there is a concern that malfunction may occur in the cooking device. As a result, higher reliability is ensured in the first embodiment, but the present invention can be realized even if the above-mentioned contact type key is adopted, and the pressing type key must always be used. is not.

(Thermal power indicator lamp)
A right heating power display lamp 40R for displaying the magnitude of the heating power of the right heating source 6R is provided on the right front side of the top plate 5 at a position corresponding to the position between the right heating source 6R and the right heating power setting operation unit 21. It has been. The right thermal power display lamp 40R is provided in the vicinity of the lower surface of the top plate 5 so as to emit display light from the lower surface thereof through the top plate 5 (permeate).
Similarly, the left heating power display lamp 40L that displays the magnitude of the heating power of the left heating source 6L corresponds to the position between the left heating source 6L and the left heating power setting operation unit 22 on the left front side of the top plate 5. It is provided at a position, and is provided in the vicinity of the lower surface of the top plate 5 so that display light is emitted from the lower surface thereof through the top plate 5 (transmitted).

The right heating power display lamp 40R for the right heating source 6R can display the heating power from 120 W to the maximum heating power of 3 kW in 12 steps. 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 246-257 (light emitting element) linearly as the circuit diagram shown in FIG. For example, in the case of fire power 1, only the light emitting diode 246 is lit, and the user can easily see the red light from the surface of the top plate 5.
Similarly, although the left heating power display lamp 40L for the left heating source 6L is not shown in the drawing, the heating power from 120 W to the maximum heating power of 2.5 kW can be displayed in 11 steps.

(Main power switch)
An operation button 11 of the main power switch 201 (see FIG. 6), a right operation dial 12R for opening and closing an electrical contact of a control switch (not shown) for controlling energization of the right heating source 6R and its energization amount (thermal power), For setting the right heating power of the central operation unit 23 and the right heating source 6R by energizing the left heating source 6L and the left operation dial 12L for opening and closing the electrical contacts of a control switch (not shown) for controlling the energization amount (thermal power). The power supply of the operation part 21 and the left heating power setting operation part 22 of the left heating source 6L is cut off. Therefore, for example, if the main power switch 201 is opened (OFF), thereafter, the operations of the right operation dial 12R and the left and right operation dials 12R become invalid all at once.

(Display means)
A display means 80 (hereinafter referred to as “central display / input unit”) 80 is provided at the center in the left-right direction of the top plate 5 on the front side in the front-rear direction. The central display / input unit 80 is mainly composed of a liquid crystal panel, and is provided in the vicinity of the lower surface of the top plate 5 so that display light is emitted from the lower surface thereof through the top plate 5 (transmitted). .
The central display / input unit 80 inputs or confirms the energization state (heating power, time, etc.) of the left heating source 6L, the right heating source 6R, the central heating source 7 and the grill heater 110A provided in the heating chamber 19, etc. It is something that can be done. That is, (i) the function of the heating source 6 (whether cooking is in progress, etc.), (ii) the function of the central heating source 7 (whether cooking is in progress, etc.), and (iii) grill cooking Is displayed with characters, illustrations, graphs, and the like as to the operation procedures and functions (for example, whether roaster, grill, or oven cooking is currently performed) when grill cooking is performed inside the heating chamber 19. Is. A specific structure and display operation will be described below.

  In FIG. 1, reference numeral 60 denotes an image display device such as a liquid crystal TV or a liquid crystal monitor attached to a kitchen wall 65, which is an installation space of a sink 64 in which the heating cooker of the present invention is installed. The well-known thing used by connecting may be used. Reference numeral 61 denotes a power cord of the image display 60, and 62 denotes a connection cable for sending an image signal to the image display 60. The connection cable is connected to an energization control circuit 200 described later via a drive circuit 244.

  The use of the image display 60 is arbitrary by the user, and the electric cable can be easily disconnected. Therefore, even if the cooking device is used without being connected to the power connection port 63, there is no influence on the cooking operation. Is the entire upper surface, left and right side surfaces, lower surface, and front surface of the image display device 60 covered with the cover 66, and is the front surface of the image display device 60, that is, the side facing the heating cooker body 1 made of a transparent material? Alternatively, a window covered with a transparent plate is provided and is detachably attached to the image display 60.

The central display / input unit 80 includes a known dot matrix type liquid crystal screen. For this reason, a high-definition screen (QVGA having 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 are displayed even when characters are displayed. be able to.
FIG. 7 schematically shows an example thereof. As shown in FIG.
The screen area 81 for displaying information is assigned to a total of 10 areas, and the corresponding areas A1, A2 of the left heating source 6L,
Corresponding areas B1, B2 of the central heating source 7,
Corresponding areas C1, C2 of the right heating source 6R,
Corresponding area D such as grill heater for grill and oven cooking (same as heating source) 110A,
Guide area E that displays cautions and reference information for various cooking to the user,
Six display keys 84, 100, 101, 102, 103, and 104 that are adjacent to each of the input keys 83 and 95 to 99 of the input key group 91 and that individually display functions that can be input with the keys are displayed. A key display area F to display (virtually);
Tips display area G,
Each is equipped.

  Each of the 10 areas (display areas) is realized on the liquid crystal screen of the central display / input unit 80, but is physically formed or partitioned on the screen itself. It is not a thing. In other words, since it is established by screen display software (microcomputer program), it is possible to change the area, shape, and position each time with that software. The arrangement order is always the same in accordance with the arrangement order of the heating sources such as the source 6L, the central heating source 7, and the right heating source 6R. That is, on the screen, the left heating source 6L is displayed on the left side, the center heating source 7 is displayed in the middle, and the right heating source 6R is displayed on the right side.

  Corresponding to the left heating source 6L, a first display area A1 for displaying the normal state of the “first condition” setting such as the heating power (heating amount) for the left heating source 6L, and the left heating source 6L A second display area A2 for displaying a setting state of "second condition" such as cooking time and set temperature (there are more types than the first condition) and an abnormal state of "physical quantities such as temperature, current and voltage"; It consists of two areas.

  Similarly, corresponding to the central heating source 7, a first display area B 1 for displaying a normal state of the “first condition” setting such as the heating power for the central heating source 7, and cooking for the central heating source 7 The second display area B2 for displaying the setting state of "second condition" such as time, set temperature, etc. (there are more types than the first condition) and "physical quantities such as temperature, current, voltage, etc." It consists of two areas.

  Similarly, corresponding to the right heating source 6R, the first corresponding area C1 for displaying the normal state of the “first condition” setting such as the heating power for the right heating source 6R, and the right heating source 6R. A second display area C2 for displaying the normal state of the “second condition” setting and the abnormal state of “physical quantities such as temperature, current, voltage” and the like (there are more types than the first condition), etc. These areas are composed of two areas.

  In FIG. 7, the arrangement relationship between the key display area F and the six input keys 83, 95 to 99 is shown. Six keys (hereinafter also referred to as display keys or soft keys) 84, 100 to 104 provided in the key display area portion F are virtual keys in the liquid crystal screen whose functions change depending on scenes. Each display key 84, 100-104 was operated by operating input keys (F1-F6, also called function keys) 83, 95-99 arranged in close proximity to display keys 84, 100-104. An operation signal corresponding to this is input to (an energization control circuit 200 described later).

  There are various methods for individually displaying the input keys, such as highlighting characters on the key portions, lighting them with light emitting diodes, etc., and emphasizing the colors and brightness of the key portions. Characters and symbols (such as arrows) necessary for setting various parameters (target heating source, heating temperature and time, energization amount, etc.) that are preconditions for input conditions are displayed on the display key portions 84 and 100 to 104. It is configured.

An information key (Tips key) 85 including a hard key is provided on the right side of the input key 104. This key corresponds to the Tips display area G above the key 104. In the display area, a specific symbol, for example, a symbol in which “i” meaning reference information (information) is circled (hereinafter, “ (I) "is displayed, if the information key 85 is pressed, detailed information useful for cooking is displayed in the guide area E of the central input / display unit 80 as shown in FIG. be able to. Specifically, the following information is displayed in the guide area E.
(1) Information on actions not related to user operations / intentions (preventing 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 cooking in general.
(4) Requests for safety of cooking devices, alarm contents, and response methods for alarms.

(Description of operation)
7 and 9 show display examples of the display keys 84 and 100 to 104 and the input keys (function keys) 83 and 95 to 99. FIG. Each of the six display keys 84 and 100 to 104 is individually provided with an LED, and an effective input display key is lit for each operation scene. For example, the display keys 100 to 104 shown in FIG. 9 are valid (active state). In the figure, “AM” is an active mark schematically showing that the vehicle is in an active state. Actually, not only lighting in a specific shape like this, but it is also possible to indicate the active state by a method such as brightening the entire area or outline of the display keys 84, 100 to 104, or changing the color.

  Among the display keys 84 and 100 to 104, keys that are invalid even if operated are distinguished by gray-out (displays the contrast and character content in a thin color) or non-display (displays only the key outline shape in a thin color). I have to. In FIG. 9, only one display 84 is grayed out or hidden (actually, even the letters “initial screen” are not displayed).

Further, the function keys 83 and 95 to 99 are configured such that effective function keys can be distinguished visually depending on whether or not an LED individually provided below the function keys is lit.
In FIG. 9, the function key 83 corresponding to the display key 84 is not lit, and even if the function key 83 whose LED is not lit is pressed, an operation that is effective in the energization control circuit 200 to be described later. A signal is not captured from the upper surface operation unit 20 (it is not a valid operation command signal for the control program that determines the operation of the energization control circuit 200).

  In other words, in the first embodiment, when the user looks at the central display / input unit 80, any desired display key is selected in this way so that the desired display key can be easily recognized and understood as soon as possible. It is programmed not to display the function name or the name of the heating source. In addition, display keys that are valid for input can be identified by characters, light emission, color, and the like. Further, the function keys 83 and 95 to 99 corresponding to the effective display keys also indicate that they are in an effective (active) state by color, light, or the like.

  As described above, the active state of the six display keys 84 and 100 to 104 and the active state of the six function keys 83 and 95 to 99 change for each input scene, but they always correspond to each other. For example, in FIG. 9, in a scene where the display key 100 is valid (the active mark AM is lit to indicate that it is active), the function key 95 is also valid (active).

In FIG. 9, since the screen area 81 of the central display / input unit 80 displays the initial state, the function key 83 corresponding to the display key 84 is inactive, and even if this key 83 is pressed, The corresponding display key 84 indicates that an input operation cannot be performed.
This is because there is no need to operate the display key 84 because the display key 84 is displayed with the explanatory text “initial screen”, but it is already the initial screen (the display itself of this initial screen is not displayed). (The display key 84 may not be displayed, but is displayed in FIG. 9 for the sake of description of the first embodiment).

  In FIG. 7, a display key 100 “Return” is pressed when it is desired to return to the previous input screen or display screen in the course of inputting the cooking conditions. The “initial screen” display key 84 is operated when it is desired to return to the initial screen at any stage.

  FIG. 10 shows an example of display of the central display / input unit 80 and the input keys (function keys) 83, 95 to 99 when the user presses the 3 kW key 86 (see FIG. 6) from the state of FIG. FIG. When the 3 kW key 86 is pressed, a menu selection command is input to the energization control circuit 200 by an input signal of the 3 kW key 86, and the control circuit displays the screen of FIG. 9 on the central display / input unit 80. Issue a command.

  In the central display / input unit 80, the area C2 of the right heating source 6R is automatically enlarged several times, and is displayed on the display area C1 with the heating power level being 12 out of 12 levels (maximum value). It can be seen that 3 kW is set. Since this thermal power cannot be lowered, the display key 102 for lowering the thermal power is inactive, and the corresponding function key 97 is inactive.

  The energization time is 2 minutes from the initial setting of 2 minutes, 5 minutes, and 10 minutes. If you want to change this 2 minutes to 5 minutes, press the 3kW key again, or change the time and temperature. In order to operate the display key 103 on which the symbol “→” to be increased is displayed, the function key 98 may be pressed. In this case, the function key 98 for increasing the time (to 5 minutes or 10 minutes) is active display, and conversely, the function key 97 corresponding to the display key 102 for shortening the time is grayed out. (Because it cannot be lowered to less than 2 minutes). However, if the time is set to 5 minutes and then returned to 2 minutes, the function key 97 is active, so the function key 97 may be pressed.

  As shown in FIG. 10, the guide area E of the central display / input unit 80 can be selected from 2 minutes, 5 minutes, and 10 minutes. In addition, the user can easily recognize that the 3 kW key can be selected or the display keys 102 and 103 on which the symbols “→” and “←” are displayed can be operated with the function keys 97 and 98. .

  As described above, in the guide area E, for example, up to 50 characters can be displayed, and the main display contents include explanations of operation functions of various keys, assistance of operation procedures, and important alarms. (Including notification of abnormal operating conditions).

FIG. 11 shows the central display / input unit 80 and function keys 83, 95 to 99 when the user presses the right IH convenient menu key (see FIG. 7, hereinafter referred to as “key”) 93a from the state shown in FIG. A display example is shown. That is, when the key 93a is pressed, the area C2 of the right heating source 6R in the central display / input unit 80 is automatically enlarged, and various cooking menus (for example, fried food, stewed food) are displayed on the left side. It can be seen that the heating power level is initially set to 625 W (weak heating power), which is 5 in 12 stages, as the heating power suitable for boiling.
Since this thermal power can be changed to a thermal power desired by the user other than the initial setting value, if the thermal power is to be reduced by one step and reduced to 563 W or less, the function key 97 is pressed once to operate the display key 102. For example, it can be lowered to two steps (500 W) by going down one step and pressing it twice. Conversely, to increase the heating power, the function key 98 may be pressed.

In addition, when the display key 101 indicated by the up and down arrows is operated, the input condition becomes “energization time”. That is, the time setting of “time: 0 minute” in FIG. 11 is possible. Therefore, to set the cooking time to 2 minutes, the function key 98 is pressed twice.
Since FIG. 10 is in the stage of setting the time in this way, the time (0 minutes) is not lowered (shortened), so the function key 97 corresponding to the display key 102 is inactive (function key). Nothing can be entered by pressing 97).

  When it is desired to reset the heating power without setting the time, if the function key 96 corresponding to the display key 101 is pressed from the state of FIG. 11, the input target is changed from “time” as indicated by the arrow of the display key 101. It is possible to move to the “thermal power” displayed in the upper position, and the input target can be changed from the time field to the thermal power field.

  In addition, if you want to change from “Boiled” to “Cut Timer” at the function setting stage of the cooking menu, press Function key 96 and it will cycle through Boiled → Warm → Fried food → Cut timer. Just adjust it.

  With the timer, the heating power of the heating source 6 is selected from levels 1 (120 W), 2 (300 W), 3 (563 W) to 8 (1 kW), and continuous cooking within 1 hour 30 minutes (90 minutes) is performed by the timer. This is a function that can be performed. For example, the right heating source 6R can be energized for 29 minutes with a heating power of “8” for cooking. In addition, the heating source in the case of the off timer operation can also be used as the central heating source 7.

  In FIG. 7, an energization mark 50 is provided to indicate that the right heating source 6R is energized and being heated by lighting or blinking. As shown in FIG. 7, the energization mark 50 appears at the right position where the name of each heating source is displayed.

(Control circuit)
FIG. 6 is a diagram showing the entire control circuit of the cooking apparatus, and 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 four parts, that is, an input unit, an output unit, a storage unit, and an arithmetic control unit. A direct-current power supply is supplied via a constant voltage circuit 232, and all heating sources ( It serves as a central control means for controlling the heating means) and the central display / input unit 80 (display means).

  In FIG. 6, a commercial power supply 202 that supplies power of 200V voltage is connected to buses 202A and 202B of the main circuit, and a main power switch 201 is provided on one bus 202A of the main circuit. Then, a right heating source circuit 206R for the right heating source 6R connected in parallel to the commercial power source 202, and a left heating source circuit 206L for the left heating source 6L (similar to the right heating source circuit 206R) ( In FIG. 6, the right IH circuit 206 </ b> L), the central circuit 207 for the central heating source 7, and the grill circuit 208 for the grill / oven heating source (in FIG. 6, the grill / oven circuit 208 is used). ) And are provided.

  The right heating source circuit 206R includes an induction heating coil 220, a rectifier bridge circuit 221 having an input side connected to the buses 202A and 202B, a DC circuit including a coil 222 and a smoothing capacitor 223 connected to the DC side output terminal. A resonance circuit composed of a parallel circuit of a heating coil 220 and a resonance capacitor 224 connected at one end to a connection point between the coil 222 and the capacitor 223, and an IGBT 225 serving as switching means having a collector side connected to the other end of the resonance circuit; It is equipped with.

  The emitter of the IGBT 225 is connected to a common connection point between the smoothing capacitor 223 and the rectifying bridge 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.

  In FIG. 6, a current detection sensor 227 detects a current flowing through a resonance circuit 225 that is a parallel circuit of a heating coil 220 and a resonance capacitor 224. The detection output of the current detection sensor 227 is supplied to the input part of the energization control circuit 200, and when a pot that is inappropriate for induction heating is used, or because of some accident or the like, it exceeds a predetermined current value by a predetermined value or more. When a difference undercurrent or overcurrent is detected, the energization control circuit 200 controls the IGBT 225 via the drive circuit 228, and the energization of the induction heating coil 220 is instantaneously stopped.

  The right heating source circuit 206R includes an induction heating coil 220, a DC circuit including the coil 222 and the smoothing capacitor 223, a drive circuit 228, the IGBT 225 that is controlled by the drive circuit, the resonance circuit 220, and a flywheel. A diode 226 and a rectifier bridge circuit 221 are included.

  The left heating source circuit 206L has a circuit configuration equivalent to that of the right heating source circuit 206R, and a description thereof will be omitted. Note that the maximum heating power of the left heating source 6L is, for example, 2.5 kW as described above, and is designed to be smaller than the maximum heating power setting of 3.0 kW of the right heating source 6R. Further, the left heating source circuit 206L and the right heating source circuit 206R may be configured by a so-called full bridge circuit.

  Although not shown, the current detection sensor 227 is similarly provided in the left heating source circuit 206L, the grill circuit 208, and the central circuit 207, respectively.

  The central circuit 207 has a series circuit of an electromagnetic relay 230 and an electric heater 231, and both ends of this circuit are connected to the buses 202 </ b> A and 202 </ b> B, respectively.

  The infrared drive circuit 233 that generates an infrared optical signal based on the drive signal output from the energization control circuit 200 includes a plurality of infrared LEDs 234 and 235 (only three are shown in FIG. 6) on the drive output side. 236 series connection circuits are connected. The other end of the series connection circuit is connected to the collector of the transistor 238 via a resistor 237, and the base of the transistor 238 is connected to the infrared drive circuit 233. Note that the emitter of the transistor 238 is grounded.

(Ventilation device)
A ventilation device 239 that is not a part of the configuration of the cooking device according to the present invention but is not an essential device or part of the cooking device according to the present invention is installed, for example, on the upper side wall of the kitchen above the installation space. ing. The ventilation device 239 includes a fan motor 243 that drives an exhaust fan for ventilation, a photodiode 240 that is an infrared light receiving element built in the control unit, a reception circuit 241, and a control circuit 242. That is, when the photodiode 240 receives an infrared signal from the series circuit of the infrared LEDs 234 to 236, the signal is transmitted to the control circuit 242 through the receiving circuit 241, and the fan motor 243 is rotationally driven by the signal.

(Control of display means)
The drive circuit 244 that drives the liquid crystal screen of the central display / input unit 80 is configured to include a display-dedicated microcomputer, and a drive signal is input from the output unit of the energization control circuit 200. The image display 60 is also connected by an electric cable 62 so as to supply an image signal.

A drive signal is input from the energization control circuit 200 to the drive circuit 245 that turns on the right heating power display lamp 40R of the right heating source 6R.
As shown in FIG. 6, the right heating power display lamp 40 </ b> R includes a circuit in which a total of 12 light emitting diodes 246 to 257 are connected in parallel to each other. One end of this parallel circuit is connected to the drive circuit 245, and the other end is connected to the ground side connection point 259 via resistors 258a to 258l, respectively. The left heating power display lamp 40L for the left heating source 6L is configured in the same manner, but the number of light emitting diodes is eleven.

  As described above, the right heating power display lamp 40R for the right heating source 6R can display the heating power from 120 W to the maximum heating power of 3 kW in 12 stages by 12 light emitting diodes.

  The left heating power display lamp 40L for the left heating source 6L is not shown in the figure, but as described above, it can display in 11 stages with 11 light emitting diodes from the heating power 120W to the maximum heating power 2.5kW. Yes.

(Temperature sensor)
In FIG. 6, a cooling fan drive circuit 260 is provided to keep the internal space of the main body 1 in a certain temperature range. The temperature detection circuit 311 receives temperature data of a total of 12 temperature sensors S1 to S7L described later.

Various temperature sensors are arranged in each part as follows.
S1 is a temperature sensor provided in the vicinity of the electric heater 231 of the central circuit 207 for the central heating source 7.
S2A is a temperature sensor provided outside the bottom of the holding frame 335 of the induction heating coil 220R of the right heating source circuit 206R.
S2B is a temperature sensor provided in the center space inside the induction heating coil 220R of the right heating source circuit 206R, and mainly detects the radiant heat temperature from the heated object N such as a pan.

S3A is a temperature sensor provided on the front upper surface of the liquid crystal substrate of the central display / input unit 80.
S3B is a temperature sensor provided on the rear upper surface of the liquid crystal substrate of the central display / input unit 80.
S4A is a temperature sensor provided at the bottom of the holding frame 335 of the induction heating coil 220L of the left heating source circuit 206L.
S4B is a temperature sensor provided in the central space inside the induction heating coil 220L of the left heating source circuit 206L, and mainly detects the radiant heat temperature from the heated object N such as a pan.

S <b> 5 is a temperature sensor provided on the ceiling of the heating chamber 19.
S6R is a temperature sensor (see FIG. 4) fixed to a cooling fin 372R to which a plurality of high voltage electrical components 371R provided in the right space 370R inside the main body 1 are attached.
S6L is a temperature sensor fixed to the cooling fin 372L to which a plurality of high voltage electrical components 371R provided in the left space 370L inside the main body 1 are attached.

  The temperature sensor S2 and the temperature sensor S4 are each composed of a pair of temperature sensors. That is, in the right heating source 6R, a substantially central portion of the ferrite plate (magnetic flux leakage prevention plate) 331R covering the lower surface of the metal container-like right holding frame 335R (directly below the center of the induction heating coil 220R wound in a disk shape). ), One temperature sensor S2A is attached, and the other temperature sensor S2B is arranged inside the holding frame 330R and in the central space of the heating coil 220R.

Similarly, the left heating source 6L includes a temperature sensor S4A and a temperature sensor S4B at positions opposite to the temperature sensors S2A and S2B of the right heating source 6R across the left and right center line CL of the main body 1, respectively.
The purpose of providing two temperature sensors in each of the left heating source 6L and the right heating source 6R in this manner is that the cooling fan 265 and the cooling fan described later in the holding frame 335L and the inside and outside of the holding frame 335R are used. By detecting the cooling effect of H.266, temperature control is to be realized more accurately.
The temperature detection states of the pair of temperature sensors S2A and S2B and the pair of temperature sensors S4A and S4B are different, and the reference temperature for determining the abnormal temperature is also different, but the left heating source 6L and the right heating source 6R are the main ones. Since it is a heating source and has a high temperature, a pair of temperature sensors are provided and monitored twice.

As shown in FIG. 3, S7R is a temperature sensor attached to each heat sink to which the power module 321R is attached.
S7L is a temperature sensor attached to each heat sink to which the power module 321L is attached as shown in FIG.
Temperature information detected by the temperature sensor S7L and the temperature sensor S7R is input to the temperature detection circuit 311.

In FIG. 6, the operation start, stop, and rotation speed (air blowing capacity) of the cooling electric blower (hereinafter referred to as cooling fan) 261, 262, 263, 264, 265, 266, 267 are respectively the cooling fan drive circuit 260. Controlled by
The cooling fan 263 has a larger blowing capacity than the cooling fan 264. This is because the right heating coil 220R on the right side has a larger maximum heating power and the amount of heat generated accordingly increases.

  As described above, all the temperature data from the twelve temperature sensors S1, S2A, S2B, S3A, S3B, S4A, S4B, S5, S6R, S6L, S7R, and S7L are energized and controlled through the temperature detection circuit 311. The circuit 200 is configured to be input.

The cooling fan drive circuit 260 always turns on the cooling fans 261, 262, 263, 264, 265, and 266 so that each temperature measurement portion does not become higher than a predetermined temperature according to the temperature measurement status from the temperature detection circuit 311. Driving and being cooled by wind.
When the temperature rises to a predetermined temperature or more due to the air cooling, an abnormal temperature signal is input from the temperature detection circuit 311 to the energization control circuit 200, and the left heating source 6L, the right heating source 6R, the electric heater 231 and the like are heated. The power source of the source is cut off or restricted, or a protection signal for safe operation is output from the energization control circuit 200 toward each heating source.
In other words, the abnormality detection means includes the energization control circuit 200, the temperature detection circuit 311 and the current detection sensor 227.

  In FIG. 6, when the energization control circuit 200 is disconnected from the commercial power source 202 by the main power switch 201, a standby power source 400 is provided to supply power instead of the commercial power source. For example, it is composed of a rechargeable battery, and when a problem such as an abnormal current is electrically generated between the commercial power source 202 and the energization control circuit 200 and is dangerous as it is, the energization control circuit 200 itself sets the main power switch 201. Connected and used when opening.

  The energization control circuit 200 includes a non-volatile semiconductor storage memory (not shown) that stores information from when an abnormality occurs in the heating cooker until the commercial power is turned off. This is because the energization control circuit 200 determines the previous failure or malfunction when the heating cooker is activated again next time, so that it does not inadvertently energize. In addition, a repairer or manufacturer of the heating cooker can read out the failure history of the memory and use it for repair. The energization control circuit 200 is configured to restrict input of various keys of the upper surface operation unit 20 only in the following cases.

Case 1: When the operation of the upper surface operation unit 20 is detected, and a predetermined time (for example, 2 minutes) has elapsed since the last use of the heating source (for example, the right heating source 6R) is stopped.
Case 2: None of the heating sources is energized, and various input keys (six function keys 83, 95 to 99, 3 kW key 86, six various operation buttons 29, 92, 93) on the upper surface operation unit 20. , 94, 300, 310, 93a, etc.) has been operated for a predetermined time (for example, 5 minutes).
As a result, while the user is away from the front of the cooking device, an input command for cooking is given for some reason, and heating is prevented from being inadvertently started. In this function, the left heating source 6L, the right heating source 6R and the central heating source 7 are energized for a desired time from the start of energization, and thereafter the timer dials 16 and 17 of timer switches (not shown) that automatically turn off the power. , 18 is different.

On the other hand, to recover from the restricted state, the following two methods are limited.
Method 1: Rotate any one of the left operation dial 12L, the right operation dial 12R, the center operation dial 13 and the like in the front operation unit 10 provided on the right front surface of the main body case 2 or project forward. Or perform other operations.
Method 2: Of the six function keys 83 and 95 to 99, perform a special pressing method that cannot be used in normal cooking (for example, press and hold a specific two of the six keys for 5 seconds). .

(Internal structure)
As shown in the longitudinal sectional view of FIG. 5, the inside of the main body 1 has a left partition plate 290 </ b> L and a right partition plate having dimensions that extend from the bottom surface of the main body 1 to the ceiling surface so as to sandwich the heating chamber 19 from both left and right sides. 290R is provided, and the left space portion 370L and the right space portion 370R are partitioned and formed between the left partition plates 290L and 290R and the left and right side walls of the main body case 2.

  The cooling fin 372R provided in the right space 370R is formed of a material having good thermal conductivity such as aluminum, and the cooling fan 261 is supported by the motor FM on the rear side. When the motor FM is driven, outside air is sucked into the right space 370R from a large number of intake holes (not shown) formed at the right side of the back surface of the main body case 2.

  Similarly, a cooling fan 263 and a motor FM are also installed in the left space portion 370L. When the motor FM is driven, outside air flows from a large number of intake holes (not shown) formed at the left side of the back surface of the main body case 2. It is sucked into the left space 370L.

  Near the ceiling surface in front of the right space 370R, a cooling fan 265 having a casing having a suction port 265A on the lower surface and a blower port 265B on one end is disposed horizontally. The cooling fan 265 sucks air that has been sucked and raised by the cooling fan 261 through the suction port 265A, and the metal partition plate 270 that divides the interior of the main body 1 vertically above the heating chamber 19 (FIG. 5). Blow upwards (see above).

  Since the partition plate 270 is a plate that divides the interior of the main body 1 vertically above the heating chamber 19, from the right front corner portion of the upper space 275 partitioned by the partition plate 270 toward the central input / display unit 80, Cooling air from cooling fan 265 is introduced (indicated by arrow F1R in FIG. 3).

  Similarly, a cooling fan 266 having a casing having a suction port 266A on the lower surface and a blower port 266B on one end is horizontally disposed near the ceiling surface in front of the left space portion 370L. The cooling fan 266 sucks air that has been sucked and raised by the cooling fan 262 through the suction port 266A, and is located above the heating chamber 19 above the metal partition plate 270 that divides the interior of the main body 1 vertically. Blow out to 275 (indicated by arrow F1L in FIG. 3).

  In the left and right front portions of the partition plate 270, communication ports are opened at positions immediately below the suction port 266A of the cooling fan 266 and directly below the suction port 265A of the cooling fan 265, respectively, and the left space portion 370L. The air is sucked by the cooling fan 266, and the air inlet of the right space 370R is sucked by the cooling fan 265.

  The entire ceiling wall surface 273 of the heating chamber 19 is covered with a heat insulating material 272. The heating chamber 19 is located in a lower space 274 that is partitioned and formed below the partition plate 270.

  As shown in FIG. 5, a square liquid crystal substrate 280 constituting the liquid crystal screen of the central display / input unit 80 is provided in the front part of the upper space 275. The liquid crystal substrate 280 is housed in a metal or plastic case 282 whose bottom side is covered with a heat insulating material 281 and only the upper surface is opened, and the case 282 keeps a predetermined gap 283 from the lower surface of the top plate 5. It is fixed to the upper surface of the partition plate 270 (the fixing member is not shown). A flange portion 282 </ b> A that extends outward is formed at the upper end of the case 282.

  A total of four communication holes 271 are formed over the entire circumference of the case 282. A part of the wind from the cooling fans 265 and 266 passes above the liquid crystal substrate 280 so that the liquid crystal substrate does not reach a high temperature. Several rows of radiation fins 284 are integrally formed on the bottom surface of the case 282 in the direction in which the wind flows (the direction indicated by the broken line in FIG. 2), so that the air cooling performance of the case 282 is enhanced.

  As shown in FIG. 5, when a large (large caliber) pan N cooked deep-fried food such as tempura has been placed on the top plate 5 for a long time (indicated by a dashed line), in particular, the position of the pan N is If it is placed too close to the center input / display unit 80 from the normal position, the heat from the pan N is likely to be transmitted to the center input / display unit 80, which may cause the temperature to rise abnormally. The communication holes 271 are provided to improve the flow of cooling air.

Similarly, in FIG. 5, the infrared LED 234 (see FIG. 6) is disposed in a groove-like space 291 provided between the rear end of the liquid crystal substrate 280 and the heat insulating material 281. In addition, although not shown, other infrared LEDs 235 and 236 (see FIG. 6) are also placed in a row immediately and transmitted through the top plate 5 to emit an infrared drive signal toward the ventilator 239. Yes.
In addition, an opening is provided in a part of the outer surface constituting the upper wall surface of the frame body 4 and the upper surface operation unit 20, the opening is covered with an infrared transmitting material, and a part of the infrared LEDs 234 to 236 or under the transmitting material All may be provided.

  An electrically insulating mounting board (hereinafter referred to as “control board”) 292 is horizontally provided over the entire lower portion of the upper surface operation unit 20 of the main body 1. On the control board 292, various input switches of the upper surface operation unit 20, for example, an operation switch operated by the operation button 92 and a plurality of switches operated by the function key 97, an electrical component group related to the upper surface operation unit 20. 293 is installed. Note that these electrical component groups are limited to those that are supplied with a relatively low voltage and a small current.

An electrically insulative mounting board (hereinafter referred to as “control board”) 294 is installed substantially parallel to the control board 292 with a certain gap 295 below the control board 292. A part of the control board 294 has a size that extends to the lower side of the liquid crystal substrate 280 of the central display / input unit 80. Electricity such as a display microcomputer constituting the central display / input unit 80 and its drive circuit 244 is provided. Parts 298 are mounted.
A plurality of mounting legs 296 </ b> A and 296 </ b> B provided at regular intervals fix the control boards 292 and 294 inside the main body 1. A part of the mounting legs 296 </ b> A and 296 </ b> B is placed and fixed on the partition plate 270.

  A constant gap 297 is also formed below the control board 294 so that air from the cooling fans 265 and 266 flows to lower the ambient temperature. Thus, the electrical components 293 and 298 on the control boards 292 and 294 are prevented from being heated to high temperatures by the heat of the top plate 5 itself or the pan N transmitted from above.

  As shown in FIG. 3, the case 282 around the liquid crystal substrate 280 and the top plate 5 around the liquid crystal substrate 280 are exposed to the flow of cooling air F1R and F1L sent from the cooling fans 265 and 266, so that they are cooled by them. . At the same time, the electrical components 293 and 298 are also cooled.

  The operation switches and the electrical components 293 of the central operation unit 23 are connected by a wiring 299, and the wiring 299B is connected to the function keys 83 and 95-99.

  A sealing seal material 333 for sealing is installed between the six function keys 83, 95 to 99 and the like and the frame body 4.

(Arrangement of display means)
The square liquid crystal substrate 280 constituting the liquid crystal screen of the central display / input unit 80 has a vertical dimension H and a horizontal dimension W shown in FIG. 2 of about 80 mm, respectively, and the case 282 is also square.
The case 282 is disposed so that the distance between the left heating source 6L and the right heating source 6R is substantially equal. That is, the distance between the outermost peripheral edge of the heating coil 220L of the left heating source 6L (hereinafter referred to as “left-right facing distance”) CB and the distance between the outermost peripheral edge of the heating coil 220R (hereinafter referred to as “left-right facing distance”) And SA) are set to be substantially the same.

The left-right facing distance SB and the left-right facing distance SA are greater than a certain limit in consideration of the distance from the pan N placed above the left heating source 6L and the right heating source 6R, the intensity of radiant heat, and the like. In addition, since the position where the pan N is placed is not constant every time it is used and varies, the left-right facing distance SB and the left-right facing distance SA are determined in consideration of various possibilities.
In FIG. 7 and subsequent drawings, the liquid crystal screen of the central display / input unit 80 is drawn in a horizontally long rectangle for explaining various display functions, but may be a square as described above.

In FIG. 3, a straight line that contacts the forefront position of the outer peripheral edge of the holding frame 335R that houses the heating coil 220R of the right heating source 6R is a horizontal straight line RL, and the outside of the holding frame 335L that houses the heating coil 220L of the left heating source 6L. A straight line in contact with the forefront position of the peripheral edge is defined as a horizontal straight line LL. At this time, the horizontal straight line RL and the horizontal straight line LL coincide with each other in the horizontal direction.
A straight line connecting the last part of the right holding frame 335R of the right heating source 6R and the last part of the left holding frame 335L of the left heating source 6L is indicated by a horizontal straight line BL (see FIG. 2).

Then, the range in which the front-rear direction is sandwiched between the lateral straight line RL (same as the lateral straight line LL) and the lateral straight line BL and the lateral direction is sandwiched between the left heating source 6L and the right heating source 6R is the heating source. Corresponds to a space SS (hereinafter referred to as “facing space”) SS.
The central display / input unit 80 is installed from the front of the counter space SS to the inside of the counter space SS so that the last part thereof enters the inside of the counter space SS. For example, the central display / input unit 80 has a length of one third or more of the vertical dimension (H) of the liquid crystal substrate 280 in the facing space SS.

Further, the distance SC (hereinafter referred to as “front-rear facing distance”) SC between the outer peripheral edge of the heat insulating heat insulating cover 7A of the central heating source 7 and the rearmost end face of the body portion of the case 282 is the left-right facing distance SA and the left-right facing distance SB. Is set to be equal to or larger than.
In particular, in the first embodiment, the central heating source 7 is a heat radiation type electric heater. Therefore, in order to reduce the influence of radiant heat as much as possible, the left-right facing distance SB between the induction heating type left heating source 6LR and the right heating source 6R is as follows. , A front-rear facing interval SC larger than a certain value than SA is secured.
In addition, the trunk | drum of case 282 means the part except the flange part 282A, and the straight line XL is a position which shows the last part of the trunk | drum of case 282 in FIG. In this embodiment, SA is 20 mm, SB is 20 mm, and SC is 100 mm.

  In FIG. 3, intake ports 320R and 320L are formed at the rear ends of the partition plate 270, and the intake ports 320R and 320L are connected to the left space portion 370L and the right space portion 370R by ducts (not shown), respectively. . In addition, an air intake port may be directly opened on the back wall surface of the main body case 2, and external air may be taken from there.

  Protective covers 324R and 324L formed from a pair of electrically insulating materials are installed on the left and right rear portions of the upper space 275 of the partition plate 270. The protective covers 324R and 324L have a plane shape that is bilaterally symmetric and has an inverted U-shaped cross-sectional shape that is open on the back side 324A and the front side.

  A power module 321R attached to a heat sink having heat radiation fins and an electric circuit component group 325R including a resonance capacitor 224, a coil 222 and the like through which a high voltage and a large current flow constitute a high frequency power conversion circuit. This high frequency power conversion circuit is installed on an electrically insulating control board (not shown) covered with a protective cover 324R.

  An inclined guide surface 324B is provided on the wall surface of the protective cover 324 on the central heating source 7 side. Similarly, a high voltage / high current electric circuit component group 325L including a power module 321L, a resonance capacitor 224, and the like is housed below the left protective cover 324L.

  The fan case 323 having a shape surrounding the cooling fan 263 has a rear side opening as a suction port 323A and has a blower outlet 323B in the front. The fan case 323 is provided with members constituting a part of the air path such as a guide member for guiding the wind, but is not illustrated. The cooling fan 263 includes a motor rotation shaft 263A.

The fan case 323 has a suction port 323A connected to the front end face of the protective cover 324R, and when the cooling fan 263 is in operation, air is introduced from the intake port 320R as indicated by an arrow FR to the heating coil 220R of the right heating source 6R. The cooling air indicated by the arrow F2R is blown out.
An inclined guide surface 323C is provided on the wall surface of the fan case 323 on the central heating source 7 side.

  The fan case 325 having a shape surrounding the cooling fan 264 has a back side opening as a suction port 325A and a blower port 325B in the front. Note that the shape of the fan case 325 is symmetrical to the fan case 323 with respect to the left and right center line CL. The cooling fan 264 includes a motor rotating shaft 264A.

  The fan case 325 connects the suction port 325A to the front end surface of the protective cover 324L in the same manner as the fan case 323, and introduces air from the intake port 320L as shown by the arrow FL when the cooling fan 264 is in operation. Cooling air indicated by an arrow F2L is blown out toward the heating coil 220L of the left heating source 6L.

As shown in FIG. 3, the air path of the cooling air that has cooled the left heating source 6L and the right heating source 6R is gradually increased from the liquid crystal screen of the central display / input unit 80 to the rear left exhaust port 75. The width of the road becomes narrower.
That is, above the partition plate 270, an air passage is defined by the guide surfaces 323C and 325C of the fan cases 323 and 325 and the left and right guide surfaces 324B of the protective covers 324R and 324L. This is because the width reaches the position directly below the left exhaust port 75 while narrowing the width sequentially. That is, as shown in FIG. 3, the width W1 of the central heating source 7, the total width of the two right exhaust ports 74 and the left exhaust port 75 (hereinafter referred to as “lateral width dimension W2”), the protective cover 324R, The relationship between the distances between 324L (hereinafter referred to as “dimension W3 between opposing wall surfaces”) is “W3>W2> W1”.

  As a result, as indicated by an arrow F4 in FIG. 3, the pressure loss of the exhaust air path reaching the right exhaust port 74 can be reduced, and the cooling air can be smoothly discharged to the outside of the main body 1. In FIG. 3, reference numerals 326L and 326R denote plates that block between the back side 324A of the protective covers 324L and 324R and the back of the main body case 2 so that the intake ports 320L and 320R and the left exhaust port 75 do not communicate with each other. I have to.

  On the other hand, from the heating chamber 19 to the right exhaust port 74 is partitioned by the exhaust duct 76 and does not cross the upper space 275 in the middle. Therefore, the cooling air flowing through the upper space 275 is not interfered with the exhaust discharged from the heating chamber 19 via the exhaust duct 76 and is discharged outside the main body 1.

  The atmosphere above the heating chamber 19 in the space below the partition plate 270 may also rise in temperature due to the heat of the grill heater 110A during grill cooking. For this reason, improvements such as forcibly causing convection and promoting convection as indicated by an arrow F5 in FIG. 5 can be considered as appropriate. Note that the air in the lower space 274 may be finally exhausted to the outside of the main body 1 by guiding it to a position adjacent to the left exhaust port 75 (rear or side) by a duct.

(Operation of the heating cooker)
Next, the outline | summary of operation | movement of the heating cooker which consists of said structure is demonstrated. A basic operation program from turning on the power to starting cooking preparation is stored in a microcomputer in the energization control circuit 200.
(Normal Step 1) Connect the power plug to a 200V commercial power source and press the main power switch 201.
When (normal step 2), a predetermined low power supply voltage is supplied to the energization control circuit 200 via the constant voltage circuit 232.

(Normal Step 3) The energization control circuit 200 is activated, self-diagnosis and check of its own control program, and if there is no abnormality, the cooling fan drive circuit 260, the left heating source 6L and the right heating source 6R drive circuit 228 and the driving circuit 244 of the liquid crystal display unit of the central input / display unit 80 are activated.
(Normal Step 4) Further, the drive circuit 228 supplies small power to the left heating source 6L and the right heating source 6R, and checks that there is no abnormality in the circuit configuration from the state of the current.

  (Normal Step 5) Further, the cooling fan drive circuit 260 starts operating the cooling fans 261, 262, 263, 264, 265, 266, and 267 at a predetermined rated current. The temperature detection circuit 311 reads temperature data from each of the temperature sensors S1, S2A, S2B, S3A, S3B, S4A, S4B, S5, S6R, S6L, S7R, and S7L provided at a total of twelve locations, and the data is supplied to the energization control circuit. Send to 200.

  As described above, in the energization control circuit 200, data such as circuit currents, voltages, and temperatures of main components are collected, and thus abnormal heating determination is performed as abnormality monitoring control before cooking. For example, when the temperature of the central display / input unit 80 is lower by 21 ° C. or lower (49 ° C. or lower) than the heat resistant temperature (eg, 70 ° C.) of the liquid crystal display unit, it is determined that the temperature is not abnormally high. In other words, when the temperature is 50 ° C. or higher, it is determined that the temperature is abnormally high.

  (Normal Step 6) Next, the current detection sensor 227 detects the current flowing through the resonance circuit 225 including a parallel circuit of the heating coil 220 and the resonance capacitor 224, and this detection output is supplied to the input part of the energization control circuit 200. If an undercurrent or an overcurrent is detected as compared with the normal current value due to some accident or poor conduction, the energization control circuit 200 determines that the current is abnormal.

  When there is no abnormality determination by the above self-diagnosis steps, “cooking start preparation is completed”. However, if an abnormality determination is made, “abnormality processing” is performed.

(Treatment for abnormalities before cooking)
(Abnormal processing step 1) In the abnormal process before cooking, it is first determined from the contents of the abnormality whether the abnormal state can be corrected by the heating cooker itself.
(Abnormal processing step 2) For example, when the temperature of the central display / input unit 80 is not 21 ° C. lower than the heat-resistant temperature (eg, 70 ° C.) of the liquid crystal display unit, but is 15 ° C. lower (that is, 55 ° C.) The liquid crystal display unit is cooled more strongly by the cooling fan 262, or immediately after performing a hot cooking utensil (eg, tempura) on the top plate 5 near the liquid crystal display unit of the central display / input unit 80. It is also possible to move the pan with alerting the user.
(Abnormality processing step 3) However, when abnormal data is judged that the abnormal condition cannot be directly corrected by the heating cooker itself (including urging the user to move the pan as described above) Immediately, the abnormal display operation starts.

(Abnormality processing step 4) “Abnormality correction processing” is executed for the abnormality information determined to be correctable.
(Abnormal processing step 5) For example, as described above, the temperature of the central display / input unit 80 is not lower than the heat-resistant temperature (for example, 70 ° C.) of the liquid crystal display unit by 20 ° C. or lower by 15 ° C. (that is, 55 ° C.). ), The liquid crystal display unit is cooled more strongly by the cooling fans 265 and 266, so that the power supplied to both the cooling fans 265 and 266 is increased by 5% from the normal time and the operation is continued. At the same time, the amount of air blown by the cooling fans 263 and 264 is increased.

  (Abnormal processing step 6) Then, after the cooling fans 265 and 266 start strong operation, they are monitored at intervals of 30 seconds, and after a predetermined time (for example, after 3 minutes), the temperature of the central display / input unit 80 is again measured. When the temperature detected by the temperature sensors S3A and S3B is worse than the heat resistant temperature (eg, 70 ° C.) of the liquid crystal display unit by 15 ° C. (that is, 55 ° C.) and exceeds 60 ° C. Is determined to be in a “dangerous state”.

(Abnormal Processing Step 7) Then, an alarm message indicating that the central display / input unit 80 is abnormally hot is displayed on the liquid crystal display unit. Specifically, the contents of the abnormality are displayed in the display area E with characters.
(Abnormal Processing Step 8) If this abnormal high temperature is not resolved within 1 minute, for example, the cooling fans 263 and 264 until the energization control circuit 200 drops to 49 ° C. or lower (however, for example, 5 minutes at the longest). After operating 265, 266, the connection is switched to the standby power source 400, the main power switch 201 is forcibly opened, and the commercial power source 202 is disconnected.
Thereby, it is possible to prevent an accident in which the liquid crystal display unit of the central display / input unit 80 is deformed or burnt out at a high temperature.

(Abnormality processing step 9) Then, after a predetermined time (for example, 10 minutes) has elapsed since the abnormality display on the central display / input unit 80, energization of the central display / input unit 80 is cut off via the drive circuit 244.
(Abnormality processing step 10) Then, the above-mentioned background until the interruption of energization, abnormal temperature data, etc. are stored in the nonvolatile memory (not shown) of the energization control circuit 200. Thus, the abnormality process ends.

(Cooking mode)
Next, the case where the right heating source 6R is used will be described as an example of the case where the cooking mode is shifted to after the pre-cooking abnormality monitoring process is completed.
(Cooking step 1) First, the right operation dial 12R of the front operation unit 10 is turned to the right or left (the heating power is set according to the amount of rotation).

  (Cooking step 2) An operation signal from the front operation unit 10 is input to the energization control circuit 200, and various input key (95, etc.) operation signals from the upper surface operation unit 20 are input to the energization control circuit 200 to Cooking conditions such as heating time are set.

  (Cooking step 3) The energization control circuit 200 drives the drive circuit 228 and drives the right heating source circuit 206R. Since the central display / input unit 80 is driven by the drive circuit 244, cooking conditions such as heating power and cooking time are displayed in the display areas C1 and C2.

  (Cooking Step 4) Since the drive circuit 228 applies a drive voltage to the gate of the IGBT 225, a high-frequency current flows through the heating coil 220. Thereby, the pan becomes high temperature by the high frequency magnetic flux from the heating coil 220. Thereafter, an electromagnetic induction overheating cooking operation (cooking mode) is entered.

(Abnormal monitoring during cooking)
The abnormality monitoring control during cooking in this heating cooker has three monitoring stages of abnormal heating monitoring processing, abnormal voltage monitoring processing, and abnormal current monitoring processing.

The abnormal heating monitoring process during cooking is the same as the above-described determination process for determining whether the temperature is abnormally high in the abnormal monitoring control before cooking, but since the cooking is started, left heating is the cause of overheating. A source 6L, a right heating source 6R, a central heating source 7 and the like are added.
In addition, the abnormal current monitoring process during cooking detected an undercurrent or an overcurrent as compared to the normal current value when a pan or the like inappropriate for induction heating was used as described above or due to some accident. One of the countermeasures for this abnormality is to control the IGBT 225 via the drive circuit 228 by the energization control circuit 200 and stop the energization of the induction heating coil 220 instantaneously.

The abnormality monitoring control during cooking is composed of two stages of abnormality monitoring control during cooking of various heating sources and abnormality monitoring control of the heating cooker body 1.
The heating source abnormality monitoring during cooking consists of abnormality monitoring of the right heating source 6R, abnormality monitoring of the left heating source 6L, abnormality monitoring of the central heating source 7, abnormality monitoring of the heating chamber 19 that performs grill cooking and the like.

  Among abnormal monitoring control of the heating cooker main body 1 during cooking, as abnormal temperature monitoring control, abnormal temperature monitoring of electrical parts of the left space portion 370L and the right space portion 370R of the main body 1, protective covers 324R, 324L It consists of abnormal temperature monitoring of the internal high-frequency power conversion circuit, abnormal temperature monitoring of the left heating source 6L and the right heating source 6R, and temperature abnormality monitoring of the central display / input unit 80.

  In the actual cooking process, the detected temperature of the temperature sensor S3A exceeds 21 ° C. (49 ° C. or less) lower than the heat resistance temperature (eg, 70 ° C.) of the liquid crystal display portion of the central display / input unit 80 and reaches 50 ° C. If it is, it is determined that the temperature is abnormally high.

When it is determined that the abnormality can be corrected and, for example, it is determined that the right heating source 6R is the source of the abnormality, the display area of the abnormal heating source 6R is enlarged in the central display / input unit 80. It is processed. Then, after maintaining the state in which the display area C2 is enlarged for a time sufficient for the user to recognize (for example, several minutes later), the screen automatically returns to the screen display of the original area area. Under the name of the heating source 6R, a warning indication “high temperature abnormality” is displayed in red letters or the like.
Note that the screen may return to the original state only when the user sufficiently confirms the content of the abnormality and performs a confirmation key operation without automatically returning to the normal screen.

  Such an abnormal state warning display is performed, and a message for calling attention, cooperation, and confirmation for correcting the abnormal state to the user can be performed in the display area E.

Next, an abnormality correction process is executed for an abnormality that is determined to be correctable. For example, when it is determined that the right heating source 6R has an abnormally high temperature, the energization control circuit issues a correction command in the following order.
(Correction command 1) Compare the amount of energization during normal operation to increase the rotational speed of the cooling fan 263 that cools the right heating coil 220R of the right heating source 6R and the cooling fan 261 on the upstream side thereof. (For example, 5%) to increase the amount of cooling air.
If the effect of improvement does not appear even if this state continues for 1 minute, then (correction command 2) the heating power (electric power) of the right heating source is lowered (from what the user has set). For example, it is reduced to the maximum thermal power among the three 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). In this case, in the display area C2, a notice to automatically reduce the thermal power is displayed.

  In order to check whether or not the high temperature abnormal state has been resolved within a predetermined short time (for example, 1 to 3 minutes) from the time when the abnormality occurs in the right heating source 6R and the display area C2 is enlarged, the energization control circuit 200 Determines again whether there is an abnormality.

  The temperature detection itself is performed every few seconds, and the energization control circuit 200 re-determines whether there is an abnormality each time. Therefore, even within one minute, the detected temperature of the temperature sensor S2 of the right heating source 6R is the predetermined temperature ( For example, when the temperature detected by the temperature sensor of the liquid crystal display unit reaches a predetermined temperature (for example, 70 ° C.), the energization control circuit 200 performs a re-judgment process for the presence / absence of the abnormality. judge.

  When the abnormal state is determined, the energization of the right heating source 6R is stopped. Therefore, when the user looks at the liquid crystal screen display, it is easy to understand that the automatic stop has occurred due to abnormal temperature rise.

  As long as it does not return to the reference value determined to be abnormal or less (for example, the temperature of the right heating source 6R is less than 280 degrees and the temperature of the central display / input unit 80 is 49 ° C. or less) in the re-determination process, normal It repeats returning processing to the step of redetermination processing, without returning to a proper cooking operation (normal cooking mode). In this way, the monitoring of the heating source abnormality and the abnormality monitoring of the main body 1 are repeated and continued during cooking.

The right heating source 6R is turned off and the right heating source 6R is turned off. However, the cooling fan 263 that cools the heating coil 220R of the heating source does not stop for two minutes after the turning off. Continue operation for ~ 5 minutes.
However, if it is found that the cooling fan itself is out of order, such as when an abnormal current from the cooling fan 263 is detected, the energization of the cooling fan is also stopped at the same time. Further, the operation duration time is determined from a formula or a numerical table that is determined in advance by the energization control circuit 200 corresponding to conditions such as the temperature rise until the energization is stopped, the room temperature, and the operating heating power level of the heating source.
Thereby, it is possible to prevent an overshoot problem that the temperature of the right heating source 6R rapidly rises immediately after the stop of air blowing from the cooling fan 262. Further, it is possible to prevent the adverse effect that the temperature of the central display / input unit 80 becomes high.

  While the cooling fan 263 is in operation, the cooling fan 261 is in operation. Since the cooling fan 261 also has a role of supplying cold air to the cooling fan 265, even if the cooling fan 263 stops due to an abnormality in the right heating source 6R, the cooling fan 261 continues to operate.

On the other hand, when the central heating source 7 is also used while the right heating source 6R is used, the cooling fan 264 is also operated simultaneously with the operation of the cooling fan 263. In this case, the right heating source 6R is energized. Even if the operation is stopped, the cooling fan 263 continues to operate.
This is because a radiant heater or the like is used for the central heating source 7 and it becomes a high temperature in a short time after the start of energization. Therefore, if the air around the heating source 7 is not cooled, the upper space 275 This is because the rear part and the top plate 5 become hot.

  Unlike the situation where the right heating source 6R is used with high heat power (for example, 3 kW), and the right heating source 6R stops generating heat, the operation of the cooling fans 263 and 264 is continued by switching to a weak operation. There is also. In addition, the cooling fan 262 operated in synchronization with the cooling fan 264 is also automatically operated in a weak operation because the right heating source 6R is de-energized and the electric component 371R constituting the power source portion does not self-heat. May be switched automatically.

  The operating capacity switching control of the cooling fans 263 and 264 is performed by controlling the temperature information from the temperature sensor S1 of the central heating source 7, the temperature sensors S2A and S2B of the heating coil 220R of the right heating source 6R, and the heating coil 220L of the left heating source 6L. The energization control circuit 200 determines the optimum value by looking at the temperature information of the temperature sensors S4A, S4B, the temperature sensors S3A, S3B of the central display / input unit 80, and the like.

  The display area of the heating source stopped in the abnormal state is displayed, and the display area C2 in which the display area is expanded is indicated by characters indicating that the abnormally high temperature stop has occurred. In this state, the display is performed for a predetermined time. After continuing, the area of the display area C2 returns to the same level as the display area A2 of the other heating source 6L, and the cooking progress state and setting conditions of the other heating sources can be confirmed in the same manner as normal. .

The liquid crystal substrate 280 of the central display / input unit 80 is heated by reflected heat from the bottom of the heated pan N or radiant heat from the top plate 5 when the left heating source 6L, the right heating source 6R, and the right heating source 6R are energized. The
In addition, when the used hot tempura pan is placed on the top plate 5 as it is, it receives heat from the hot pan (near 200 ° C.). Further, when the central heating source 7 is energized, the temperature becomes 300 ° C. or higher. Although there is the heat insulating cover 7A, the liquid crystal substrate 280 receives the heat of the top plate 5 directly above and the reflected heat from the bottom of the pan placed thereon.

  In the first embodiment, in order to suppress the temperature rise of the liquid crystal substrate 280 of the central display / input unit 80, air cooling is performed from the right side by the cooling fans 263 and 265, and air cooling is performed from the left side by the cooling fans 264 and 266. I have to.

  When any of the central heating source 7, the left heating source 6 </ b> L, and the right heating source 6 </ b> R is energized, four cooling fans 263, 264, 265, and 266 are operated, and the liquid crystal substrate 280 of the central display / input unit 80 is operated. The air for cooling is sent like arrows F1R, F1L, F2R, F2L shown in FIG. For this reason, a part of the air passes through the bottom surface side of the liquid crystal substrate and cools the bottom surface and the outer side surface of the case 282. A part of the air enters the space above the liquid crystal substrate 280 through a total of four communication holes 271 formed over the entire circumference of the case 282, and is cooled so that the upper surface temperature of the liquid crystal substrate 280 does not become abnormally high.

Since the air blown from the cooling fans 265 and 266 flows along both the upper and lower surfaces of the control board 292 and the control board 294, the temperature rise of the electrical component groups 293 and 298 mounted on the control boards 292 and 294 is achieved. Is also suppressed.
When the temperature of the top plate 5 rises, the control boards 292 and 294 and the electrical component groups 293 and 298 are also thermally affected, but the wind blown from the cooling fans 265 and 266 flows as described above. Abnormal temperature rise is prevented because the surrounding atmosphere does not stagnate.

A part of the air that cools the periphery of the liquid crystal substrate 280 is guided rearward along several rows of heat radiation fins 284 formed on the bottom surface of the case 282. Then, the air blown out from the cooling fans 265 and 266 merges with the cooling air from the cooling fans 263 and 264, and changes the direction of flowing toward the rear of the main body 1 as shown by arrows F3 and F4 in FIG. Cool around source 7.
As a matter of course, the lower surface of the top plate 5 is cooled by such a series of air flows, so that the temperature rise of the upper surface (front surface) of the top plate 5 is also suppressed. Accidents such as are prevented.

If an image display 60 such as an existing television or liquid crystal monitor is connected to the heating cooker body 1, the same information displayed on the display screen of the liquid crystal substrate 280 of the central display / input unit 80 is displayed. It is displayed on the display device 60. Therefore, the user can check the operation status of the cooking device on a large screen facing the wall of the kitchen where the cooking device body 1 is installed.
When the image display 60 is receiving and broadcasting a general television broadcast, for example, display information from the energization control circuit 200 and the drive circuit 244 is displayed via the superimpose circuit means. If it is sent to 60, it becomes possible to notify cooking condition information, cooking progress information, abnormality alarm, etc. of the cooking device on a part of the screen while watching the television program.

In the first embodiment of the present invention, as described above, the liquid crystal substrate 280 is much larger (larger area) than the conventional one, and various conditions such as cooking conditions for the user, cooking progress state, abnormal state, etc. The display can be displayed more accurately and easily recognized.
In order to achieve this, in the first embodiment, the liquid crystal substrate is square (the part that actually functions as the display screen is also square), and the position of the rear end in the front-rear direction is the heating coil of the right heating source 6R. More than one third of the vertical dimension H of the liquid crystal screen enters the frontmost position RL of the outer peripheral edge of 220R and the position of the straight line XL behind the frontmost position LL of the peripheral edge of the heating coil 220L of the left heating source 6L. did.

Theoretically, a form in which the liquid crystal screen is formed in a rod-like horizontally long shape or a plurality of small display areas are scattered is conceivable, but there are many problems in terms of usability and visibility from the viewpoint of the user.
In addition, the heating coils 220R and 220L of the left heating source 6L and the right heating source 6R, the electric heater 231 of the central heating source 7 and the like are almost circular in shape of a heating cooker such as a pan. It must be circular. As described above, the heating coils 220R and 220L, the electric heater 231 of the central heating source 7 and the like have to be almost circular or approximate in terms of actual practicality and heating efficiency.

Therefore, due to such actual restrictions, in the first embodiment of the present invention, the liquid crystal screen is square, and the position of the rear end thereof is the frontmost position RL of the outer peripheral edge of the heating coil 220R of the right heating source 6R and the left heating source 6L. The heating coil 220L has a shape that enters the position of the straight line XL behind any position of the foremost position LL on the periphery of the heating coil 220L. In other words, the liquid crystal substrate 280 is arranged to enter the inside of the facing space SS.
As described above, the liquid crystal substrate 280 faces the back of the facing space SS where the heating coil 220L and the heating coil 220R of the left heating source 6L and the right heating source 6R face each other.

As described above, in the first embodiment, the left and right facing distances SA and SA and the front and rear facing distance SC between the liquid crystal screen and the outer peripheral edges of the heating sources 6R, 6L, and 7 installed in the space below the top plate 5 are considered. The liquid crystal screen of the central display / input unit 80 is disposed below the top plate 5 and at the center of the left and right sides thereof.
Thereby, confirmation of the heating conditions of the left heating source 6L, the right heating source 6R, and the central heating source 7, the cooking progress state, the abnormality occurrence state, and the like can be intensively grasped by the liquid crystal screen 280. That is, the burden can be greatly reduced as compared with the burden of the user confirming the individual installed screen for each heating source.

As described above, in the first embodiment,
A main body 1 having a rectangular planar shape with a top plate 5 on which an object to be heated is placed;
A plurality of heating sources 6L, 6R, 7 installed below the top plate 5 of the main body 1 and supplying electromagnetic energy or heat energy via the top plate 5;
Input means for inputting cooking conditions such as the heating amount and heating time of the heating sources 6L, 6R, 7 to the control means 200;
A central display / input unit 80 of a square screen for displaying the cooking conditions of the plurality of heating sources 6L, 6R, 7 input from the input means so as to be visible from above the main body 1,
With
The heating sources 6L and 6R are arranged at predetermined intervals in the left-right direction of the main body 1,
Since part of the central display / input unit 80 has entered the facing space SS of the heating sources 6L and 6R,
In a heating cooker that can handle various types of cooking, it is possible to check troublesome cooking conditions and perform cooking while viewing a common screen.

In addition, since the abnormality occurrence status of each heating source and electrical parts is also displayed on the common screen, the user can quickly and easily recognize the occurrence of the abnormality even during cooking, improving safety. To do.
In addition, the fact that the cooking device is in a state of abnormal heating or the like can be notified to the user on the common screen so as not to cause unnecessary confusion.

  If a display means such as a liquid crystal display surface is provided on the upper surface of the heating cooker (including under the top plate), it is easy for the user to visually recognize it even during cooking, but the upper surface of the cooking device depends on a plurality of heating sources. A heating space (such as a space for placing a pan) is required, and a method of simply increasing the size of the display means and increasing the display area in order to increase the amount of information displayed cannot be adopted. However, in the first embodiment described above, the central display / input unit, which is one common display means, effectively utilizes the installation space space of the plurality of heating sources, and thus there is a restriction on the heating space as described above. Among them, the function as the display means can be sufficiently exhibited.

  In addition, when the cooking conditions for only a specific heating source are displayed on the central display / input unit 80, reference information such as precautions specific to the cooking or the type of the object to be heated is automatically displayed. Since a guide area 81E is provided, and information on abnormality and information on coping with the abnormality are displayed in this guide area at the time of abnormality, cooking conditions can be input and cooking can be facilitated, and convenience is improved. At the same time, it is possible to call attention to how to deal with abnormal situations and usage methods that do not cause abnormal operation, and it is possible to provide an environment in which the user can use the site more safely and safely.

In the first embodiment, the following effects can be expected at the same time due to the special configuration described above.
(1) The left heating source 6LR and the right heating source 6RL are arranged in the lower space 274 of the top plate, and another central heating source (a central radiant heater or the like) 7 is disposed therebetween. In the lower space 274, the left heating source 6L and The cooling air that has cooled the right heating source 6R is configured to cool the central heating source 7 and to be exhausted from the right exhaust port 74 at the rear of the main body 1. The fan cases 323 and 325 are provided on both sides of the central heating source 7. Since the air passages are defined between the guide surfaces 323C and 325C and the left and right guide surfaces 324B of the protective covers 324R and 324L, the exhaust flow after cooling the heating sources 6L, 6R, and 7 is smooth. To the left exhaust port 75.

  (2) Since the air path is formed so that the interval becomes narrower as it approaches the left exhaust port 75, the cooling air flowing in the lower space 274 of the main body 1 can be discharged smoothly.

  (3) As a means for partitioning the air passage, a structure such as protective covers 324R and 324L and a pair of fan cases 323 and 325 provided on the left and right sides is used, so there is no need to provide new dedicated parts. The exhaust flow can be made smooth while suppressing an increase in the number of parts.

  (4) Since the width (W2) of the exhaust port is equal to or smaller than the duct interval W3, the exhaust flow flowing from upstream can be smoothly discharged to the outside of the main body 1. it can.

  (5) Since the cooling air from the cooling fans 263 and 264 cooling the left heating source 6L and the right heating source 6R is supplied around the liquid crystal substrate 280 of the central display / input unit 80, the space below the main body 1 In 274, the liquid crystal substrate can be prevented from being exposed to an abnormally high temperature atmosphere.

  (6) Around the liquid crystal substrate 280 of the central display / input unit 80, in addition to the cooling air from the cooling fans 263 and 264, cooling air not passing through the left heating source 6L and the right heating source 6R is also used for the cooling fan. Since it is supplied at 265 and 266, the liquid crystal substrate 280 can be reliably prevented from being exposed to an abnormally high temperature.

  (7) Since the cooling air from the cooling fans 265 and 266 is supplied to the lower front part of the top plate 5, the temperature rise around the upper surface operation unit 20 and the control boards 292 and 294 below the upper operation unit 20 is suppressed. The temperature degradation of the parts group 293 and 298 can be prevented, and the temperature rise of the input key groups 91, 93, 24, the frame 4 and the like of the upper surface operation unit 20 can be suppressed, and the user can control them. The risk of burns when touched can be eliminated.

  As described above, in the first embodiment of the present invention, in the cooking device that can handle various types of cooking, various cooking condition setting situations can be confirmed each time by looking at the common display screen, Since the display screen is in the space between the left and right heating sources, the rear end of the display screen is formed in a size that extends to the rear position from the straight line connecting the front ends of both heating sources. In such a limited space on the top surface of the main body, a larger display screen can be installed and a large amount of information can be displayed. In addition, adverse effects (heat, lines of magnetic force, etc.) from the left and right heating sources can be reduced.

[Embodiment 2]
FIG. 12 shows the cooking device according to the second embodiment of the present invention, and is a plan view showing the structure of the central display / input unit and the upper surface operation unit of the main body. In the heating cooker according to the second embodiment, the input key group 91 provided in the central operation unit 23 of the first embodiment is omitted, and input of various cooking conditions and the like are input keys provided in the central display / input unit 80. I'm trying to do it. The same parts as those in the first embodiment are denoted by the same reference numerals, and a part of the description is omitted.

The central display / input unit 80 is configured by a dot matrix type liquid crystal screen as in the first embodiment. As shown in FIG. 12, the screen area 81 for displaying information is allocated to a total of 10 areas. In particular,
Corresponding areas A1, A2 of the heating source 6L,
Corresponding areas B1, B2 of the central heating source 7,
Corresponding areas C1, C2 of the right heating source 6R,
Corresponding area D of heating sources 110A, 110B for grill and oven cooking,
Guide area E that displays cautions and reference information for various cooking to the user,
A key display area F for displaying six independent display keys 84, 100, 101, 102, 103, and 104 having a function of directly inputting various cooking conditions and the like;
Tips display area G,
Each is equipped.

On the transparent glass surface plate that covers the uppermost surface of the liquid crystal screen of the central display / input unit 80, positions corresponding to the positions of the six display keys 84, 100, 101, 102, 103, 104 are respectively provided. Six input keys 484, 500, 501, 502, 503, and 504 of the upper surface operation unit 20 for giving commands to the energization control circuit 200 are formed independently.
These input keys 484, 500, 501, 502, 503, and 504 employ contact type keys whose capacitance changes when the user touches a finger or the like, and the user touches the key surface lightly. An input signal is generated.

  On the glass plate constituting the input key portion (area), characters, figures and symbols (including arrows as shown in FIG. 12) indicating the key input function are not displayed by printing or engraving. On the liquid crystal screen (key display area F) below these keys, characters, figures, and symbols (as shown in FIG. 12) indicating the key input function for each operation scene of the input keys 484, 500, 501, 502, 503, and 504 are displayed. (Including simple arrows).

From the upper surface of the input keys 484, 500 to 504, the user can select a predetermined input function character displayed by the display keys 84, 100 to 104 (for example, characters such as “initial screen” and “return”, and symbols such as arrows). Can be visually confirmed.
In addition, it is possible to distinguish the keys in the active state (if the keys are operated, they become effective operation command signals for the control program that determines the operation of the energization control circuit 200).

  Also, among the input keys 484 and 500 to 504, the keys that are invalid even if operated are the display keys 84 and 100 to 104 themselves are input function characters like the display key 102 corresponding to the input key 502 in FIG. Is displayed on the liquid crystal screen and indicates that the user is in an inactive state, the user can easily specify the input keys 484 and 500 to 504 that can be input by the touch method for each operation scene. It has become.

  As described above, also in the second embodiment of the present invention, various cooking condition setting situations can be confirmed each time by looking at a common display screen, and the display screens are arranged on the left and right sides of the main body upper surface space. It can be of a large area and can display a lot of information. In addition, adverse effects (heat, lines of magnetic force, etc.) from the heating sources arranged on the left and right can be reduced.

  Furthermore, in the second embodiment, when the user views the central display / input unit 80, the desired input key can be easily recognized and understood as soon as possible, and the central display / input unit can be recognized. Since it is possible to input cooking conditions and the like by operating input keys prepared on the display screen, it is possible to provide an easy-to-use cooking device.

  In addition, since the fact that the pan to be used is not suitable is informed by letters or figures, the user can be encouraged to use it correctly and a highly reliable cooking device can be obtained.

  As described above, the cooking device of the present invention can easily input the setting conditions and the like of each of the plurality of heating sources and can easily and reliably check the usage status. Can be widely used in various cooking devices.

  1 Heating cooker body (main body), 2 body case, 3 top plate, 4 frame body, 5 top plate, 6 heating source, 6LM guidance mark, 6R right heating source, 6L left heating source, 6RM guidance mark, 6LM guidance mark 7 Central heating source, 7A Insulation cover, 7M Information mark, 10 Front operation part, 11 Operation button, 12 Left control switch, 12L Left operation dial, 12R Right operation dial, 13 Central operation dial, 14 Right indicator light, 15 Left Indicator lamp, 16 timer dial, 19 heating chamber, 20 top operation section, 21 right heating power setting operation section, 22 left heating power setting operation section, 23 central operation section, 24 one-touch key section, 25 weak heating power key, 26 medium heating power Key, 27 high heat key, 29 operation buttons, 34L left timer switch, 34R right timer switch, 35L left Crystal display unit, 35R Right liquid crystal display unit, 36L Left fried food selection switch, 36R Right fried food selection switch, 40L Left heated power display lamp, 40R Right thermal power display lamp, 50 Energized mark, 60 Image display, 62 Electric cable, 64 Sink, 65 Wall, 70 Door, 71 Front opening, 72 Window, 73 Receptacle, 74 Right exhaust port, 75 Left exhaust port, 76 Exhaust duct, 80 Center display / input unit, 81 Screen area, 81E Guide area, 83 Input key (function Key), 84 display key, 85 information key, 86 strong heat key (3 kW key), 91 input key group, 92 operation button, 93 IH convenience menu button, 93a right IH convenience menu button (key), 94 operation button, 95 to 99 Input keys (function keys), 100 to 1 4 display key, 110A grill heater (heating source), 200 energization control circuit (control means), 201 main power switch, 202 commercial power supply, 202A bus, 206L left heating source circuit, 206R right heating source circuit, 207 central circuit, 208 Grill circuit, 220 resonance circuit, 220L left heating coil (induction heating coil), 220R right heating coil (induction heating coil), 221 rectifier bridge circuit, 225 resonance circuit, 226 flywheel diode, 227 current detection sensor, 228 drive circuit, 230 electromagnetic relay, 231 electric heater, 232 constant voltage circuit, 233 infrared drive circuit, 241 reception circuit, 242 control circuit, 243 fan motor, 244 drive circuit, 245 drive circuit, 246-257 light emitting diode, 258a-258l resistance 259 Ground side connection point, 260 Cooling fan drive circuit, 261 to 267 Cooling fan, 263A rotary shaft, 264A rotary shaft, 265A suction port, 265B air outlet, 266A suction port, 266B air outlet, 270 Partition plate, 271 Communication Hole, 272 Heat insulating material, 273 Ceiling wall surface, 274 Lower space, 275 Upper space, 280 Liquid crystal substrate, 281 Heat insulating material, 282 Case, 282A Flange, 283 Air gap, 284 Heat radiation fin, 290L Partition plate, 290R Right partition plate, 291 Groove-like space, 292 Control board (electrically insulating mounting board), 293 Electrical component group, 294 Control board (electrically insulating mounting board), 298 Electrical components, 300 operation buttons, 311 Temperature detection circuit, 320L Inlet, 320R Inlet, 321L power module, 321R power module, 323 fan case, 323A inlet, 323B outlet, 323C guide surface, 324A rear side, 324B guide surface, 324L protective cover, 324R protective cover, 325 fan case, 325A inlet, 325B outlet, 325L electricity Circuit parts group, 325R Electrical circuit parts group, 330P Ventilation hole, 330R Holding frame, 331L Left magnetic flux leakage prevention plate, 331R Right magnetic flux leakage prevention plate, 332 Heat insulating material, 333 Seal seal material for sealing, 335L Left holding frame, 335R Right Holding frame, 370L left space part, 370R right space part, 371R high voltage electrical component, 372L cooling fin, 372R cooling fin, 400 standby power supply, 484 input key, 502 input key, A1 first display area (corresponding area), A2 second Display area, AM active mark, B1 first display area (corresponding area), B2 second display area, C1 first display area (corresponding area), C2 second display area (corresponding area), D corresponding area , E Guide area (display area), F key display area, G display area, N pan (object to be heated), BL horizontal straight line, CL horizontal center line, LL horizontal straight line (frontmost position), RL horizontal straight line ( Frontmost position), S1 to S7L temperature sensor, SA left-right facing distance, SB left-right facing distance, SC front-rear facing distance, SS facing space.

Claims (1)

A body with a top plate on which the object to be heated is placed;
Induction heating means provided with a left heating coil and a right heating coil respectively installed at a left position and a right position in a lower space of the top plate;
Control means for controlling cooking conditions of the plurality of heating means;
Input means having a plurality of input keys for inputting the cooking conditions to the control means;
Display means for displaying the cooking conditions input by an input key of the input means;
With
A part of the display means enters the space between the left heating coil and the right heating coil, and is visible from above the main body,
When both the left heating coil and the right heating coil are induction-heated, the cooking conditions for the left heating coil and the cooking conditions for the right heating coil are displayed simultaneously on the left and right positions of the display means, respectively. Yes,
The left position of the display means has two areas: a first display area that displays the first condition setting state of the left heating coil and a second display area that displays the setting condition of the second condition of the left heating coil. And the right position of the display means is a first display area for displaying the first condition setting state of the right heating coil and a second display area for displaying the setting condition of the second condition of the right heating coil. 2 areas,
The area and shape of each of the areas can be changed,
The input key is closer to the front of the main body than the left position and the right position where the cooking conditions of the left heating coil and the cooking conditions of the right heating coil are displayed at the same time, and the upper surface of the display means or the Arranged in the left-right direction on the upper surface closer to the front side than the display means of the main body,
Furthermore, a guide area for displaying cautions and reference information in various cooking by characters, a first display area for displaying the first condition setting state of the left heating coil, and a setting state of the second condition of the left heating coil are displayed. The second display area, the first display area that displays the first condition setting state of the right heating coil, and the second display area that displays the setting condition of the second condition of the right heating coil. In a predetermined position near the key, display in a horizontally long shape with a predetermined area,
The guide area has a configuration in which a predetermined area is maintained at the predetermined position in both the left heating coil and the right heating coil in the simultaneous heating state and any one of the input states,
The display means includes a liquid crystal display substrate disposed near the front surface of the main body, straddling a straight line connecting the front surface of the left heating coil and the front surface of the right heating coil, and having a square or rectangular outer shape in plan view. ,
The left cooking coil and the right heating coil are induction heating sources having a circular outer shape in plan view.

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