JP5127936B2 - 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 cooker that heats food placed on the upper surface of one main body (housing) with a plurality of electromagnetic induction heating sources, or a radiation type such as an electric heater in addition to an electromagnetic induction heating source There is an electromagnetic cooker (so-called combined cooker) that can be heated by a heating source.
And the electric cooking heater which controls a heating time is disclosed (for example, refer patent document 1).
Moreover, the induction heating cooking appliance which prescribed | regulated the operating frequency of the frequency converter is disclosed (for example, refer patent document 2).
Furthermore, a cooking heater provided with a shielding plate surrounding the heating means is disclosed (for example, see Patent Document 3).

Japanese Patent Laid-Open No. 1-269833 (page 6-7, FIG. 9) Japanese Patent Laid-Open No. 2-109292 (page 2, FIG. 1) Japanese Utility Model Publication No. 3-50790 (page 6-8, FIG. 2)

However, as in the inventions disclosed in Patent Documents 1 to 3, since the conventional cooking device has two heating means (same as the heating source), for example, there are as many as 5, for example, each of them. In controlling, it was necessary to adjust a plurality of operation units such as input switches and heating power control knobs of each heating means. For this reason, there is a problem that the selection of the first cooking menu and the setting of cooking conditions such as firepower are more troublesome, especially as the function has a function to cope with various types of cooking.
In addition, since the result of such adjustment is individually displayed on a plurality of display units by “liquid crystal, lamp, character, etc.”, the state of each must be confirmed separately. For this reason, there was a problem that confirmation of the result of adjustment was troublesome, especially so that it had a function which can respond to many kinds of cooking.
In addition, various alarm indications of conventional cooking devices are displayed as "English symbols, abbreviations" determined by the cooking device manufacturer. The meaning was understood. For this reason, there is a problem in that it is not possible to immediately determine whether the alarm is actually important for general users.

  The present invention has been made in order to solve the above-described problems, and makes it possible to set and confirm cooking heating conditions (heating power, time, temperature, etc.) on a common screen as much as possible. At the same time, it is an object of the present invention to provide a cooking device capable of easily confirming the abnormal state when an abnormality occurs in the heating means.

The heating cooker according to the present invention is
A plurality of electromagnetic induction heating means;
Input means for inputting cooking conditions such as the heating amount and heating time of the heating means;
Display means for displaying cooking conditions of the plurality of heating means input from the input means;
Control means for detecting abnormal operating conditions of the electric parts except the heating means and the heating means, and controlling the heating means in which an abnormality is detected and the electric parts excluding the heating means and the display means;
With
On the display screen of the display means,
A display area corresponding to each of the plurality of heating means;
And a guide area that is used in common for the plurality of heating means, and at least one of an alarm and guidance is displayed as a message,
The control means includes
While displaying the heating conditions of the heating means in the display area in the state of operating normally,
In the state where an abnormality has occurred, the abnormality occurrence is displayed in the display area corresponding to the heating means related to the abnormality,
The control means includes
Further, determine the size of the pan used in the heating means,
In the display area corresponding to the heating means, the heating condition of the heating means is displayed in letters, and the fact that the pot size is being determined is displayed in letters ,
After determining the size of the pan, the determination result of the pan is displayed in characters in the guide area. When the pan is determined to be inappropriate for electromagnetic induction heating, information on the countermeasure is displayed in characters in the guide area. To do.

  Since the present invention is configured as described above, it can be used for various types of cooking, and the setting status of various cooking conditions can be checked each time by looking at a common screen, and the heating means of the cooker is displayed in the display screen area. When an abnormality occurs in an important electrical component or the like (same as the heating source), the generated abnormality information can be displayed by characters or the like, and the generated abnormal state can be quickly transmitted to the user.

1 is an overall perspective view of a heating cooker showing Embodiment 1 of the present invention. The cross-sectional view of the upper part of the heating cooker shown in FIG. FIG. 3 is a longitudinal sectional view taken along line YY shown in FIG. 2. The principal part top view which shows the upper surface operation part and center display and input part of a 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 of the relationship between the display screen of a center display and an input part, and an input key (the 1). Explanatory drawing of the relationship between the display screen of a center display and an input part, and an input key (the 2). Explanatory drawing of the relationship between the display screen of a center display and an input part, and an input key (the 3). Explanatory drawing of the relationship between the display screen of a center display and an input part, and an input key (the 4). Explanatory drawing (the 5) of the relationship between the display screen of a center display and an input part, and an input key. Explanatory drawing (the 6) of the relationship between the display screen of a center display and an input part, and an input key. Explanatory drawing (the 7) of the relationship between the display screen of a center display and an input part, and an input key. Explanatory drawing (the 8) of the relationship between the display screen of a center display and an input part, and an input key. Explanatory drawing (the 9) of the relationship between the display screen of a center display and an input part, and an input key. Explanatory drawing (the 10) of the relationship between the display screen of a center display and an input part, and an input key. The flowchart for demonstrating control operation of the abnormality occurrence state (the 1). The flowchart for demonstrating operation | movement of an abnormality generation state (the 2). The flowchart (the 3) for demonstrating operation | movement of an abnormality generation state. The flowchart (the 4) for demonstrating operation | movement of an abnormality generation state. The flowchart (the 5) for demonstrating operation | movement of an abnormality generation state. Explanatory drawing of the screen 1 which a center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 2 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 3 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 4 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 5 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 6 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 7 which a center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 8 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 9 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 10 which a center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 11 which the center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 12 which a center display and input part displays in the abnormality occurrence state. Explanatory drawing of the screen 13 which the center display and input part displays in the abnormality occurrence state. The top view which shows the structure of the upper surface operation part of the main body in the heating cooker which concerns on Embodiment 2 of this invention, a center display and input part, and an upper surface operation part.

Embodiment 1 FIG.
1 to 35 show a cooking device according to Embodiment 1 of the present invention. 1 is an overall perspective view of the heating cooker, FIG. 2 is a cross-sectional view of the whole, FIG. 3 is a vertical cross-sectional view taken along line YY of FIG. 2, and FIG. 4 is a top operation unit and a central display / input unit. FIG. 5 is an electric circuit diagram, FIG. 6 is a plan view of the main part showing the upper surface operation unit and the central display / input unit, etc., and FIG. 7 is a schematic diagram showing the display area division of the central display / input unit. 8 to 17 are explanatory diagrams showing the relationship between the display screen of the central display / input unit and the input keys, FIGS. 18 to 22 are flowcharts for explaining the operation in the abnormality occurrence state, and FIGS. It is explanatory drawing which shows the screen 1-the screen 13 which a center display and input part displays in the abnormality occurrence state.

In FIG. 1, the cooker main body 1 includes a box-shaped main body case 2 formed from a metal plate, and a top plate 3 formed from a metal plate that closes the upper surface opening of the main body case 2.
The top surface of the top plate 3 is covered with a frame-shaped frame 4, and the top plate 3 is formed of a nonmagnetic stainless steel plate or aluminum plate, and a large opening provided at the center transmits infrared rays with heat-resistant tempered glass. It is covered in a sealed state by a flat top plate 5 made of a material to be made. Then, water drops or the like from the upper surface of the top plate 5 do not enter the main body 1 through the frame body 4.

As electromagnetic induction heating means, a right electromagnetic heating coil (hereinafter referred to as “right heating coil”) 6R is disposed inside the main body 1 on the lower surface side of the right position of the top plate 5, and the upper end of the right heating coil 6R. Is close to the top plate 5. In this example, a device having a maximum power consumption (maximum heating power) of 3 kW is used.
Also, a left electromagnetic heating coil (hereinafter referred to as “left heating coil”) 6L is disposed inside the main body 1 on the lower surface side of the left side position of the top plate 5, and the upper end portion of the left heating coil 6L is the top plate 5. Is close to. In this example, a device having a maximum power consumption (maximum heating power) of 2.5 kW is used.
These two heating coils 6R and 6L are electrically connected to an energization control circuit (not shown) so that energization and the amount of electric power can be controlled independently and the heating power can be set separately.

Each of the right heating coil 6R and the left heating coil 6L includes a coil 316R and a coil 316L wound in a vortex shape so as to generate an eddy current when energized, and a metal container with a circular shape and an open top surface (see FIG. A plurality of ventilation holes 330P are provided on the surrounding wall surface, and the holding frame 330R and the holding frame 330L for cooling air to pass through, and a ferrite plate (which covers the entire lower surface or a part thereof) ( (Magnetic flux leakage prevention plate) 331R, ferrite plate 331L, and the like (FIG. 4 shows the left heating coil 6L in a partially broken sectional view).
The edges of the upper surface openings of the holding frame 330R and the holding frame 330L are installed so as to be in contact with the lower surface of the top plate 5 via the heat insulating material 332, and the upper surfaces of the right heating coil 316R and the left heating coil 316L are It is installed so as to face the lower surface with a certain gap 335 therebetween.

  The central heating means 7 is disposed inside the main body 1 on the left and right center lines of the top plate 5 and at a position near the rear thereof, and is a coil that is heated by electromagnetic induction or an electric heater that is heated by radiation (for example, Nichrome wire or halogen heater). For example, the one having the capacity of the maximum power consumption (maximum heating power) 1.2 kW is used, and the cooking utensil (not shown) such as a pan placed thereon is heated through the top plate 5.

A front operation unit 10 is provided on the right front surface of the main body case 2. The front operation unit 10 is provided with an operation button 11, an operation dial 12R, an operation dial 12L, an operation dial 13, an indicator lamp 14, and an indicator lamp 15.
The operation button 11 operates the main power switch 11MS for simultaneously turning on / off all the power sources of the left heating coil 6L and the right heating coil 6R, the central heating means 7, and the electric heaters 110A and 110B for oven cooking and grill cooking. To do.
The operation dial 12R is used to open and close the electrical contacts of the control switch 12RS that controls the energization of the right heating coil 6R and the energization amount (thermal power) thereof.
The operation dial 12L is used to open and close the electrical contacts of the control switch 12LS that controls energization of the left heating coil 6L and the energization amount (thermal power) thereof.
The operation dial 13 controls the energization of the central heating means 7 and the energization amount (thermal power).
The indicator lamp 14 is lit when the right dial is energized with the operation dial 12R.
The indicator lamp 15 is lit while the operation dial 12L is energized to the left heating coil 6L.

  When not in use, the three operation dials 12R, 12L and 13 are pushed in so as not to protrude from the surface of the front operation unit 10 as shown in FIG. When pressed once with a finger, the operation dials 12R, 12L, and 13 can be turned forward and the operation dials 12R, 12L, and 13 can be turned. At this stage, the left heating coil 6L, the right heating coil 6R, and the central heating means 7 are energized. The Therefore, if the operation dials 12R, 12L, and 13 are further rotated to the left and right, the energization amount is determined according to the amount of rotation, and the heating power can be set.

  Further, operation dials 17, 18, and 16 are installed in the front operation unit 10, and the left heating coil 6L, the central heating means 7, and the right heating coil 6R are energized for a desired time from the start of energization, and thereafter automatically. A timer switch (not shown) for turning off the power is operated.

A heating chamber 19 is defined in the lower half of the inside of the main body 1, and left and right and upper and lower wall surfaces are formed by metal plates. An electric heater (110A in FIG. 4) with a maximum power consumption (maximum thermal power) of 1200 W is provided near the upper ceiling in the heating chamber 19, and an electric heater (not shown) with a maximum power consumption of 800 W is provided near the bottom. It has been.
Therefore, the heaters are energized simultaneously or individually to prepare roast cooking (for example, grilled fish), grill cooking (for example, pizza or gratin), or oven cooking (for example, cake or grilling) in which the ambient temperature in the heating chamber 19 is set. Vegetables).

  Further, an upper surface operation unit 20 is disposed on the top surface of the top plate 3, specifically on the front portion of the frame body 4, and as shown in FIG. The coil 6L, the right heating coil 6R, the central heating means 7, and the operation part 23 of an electric heater (not shown) for oven cooking or grill cooking are arranged, and the right heating coil 6R is located on the right side of the left and right center line. The thermal power setting operation unit 21 of the left heating coil 6L is arranged on the left side of the left and right center line.

FIG. 6 is an enlarged plan view showing a part of the top surface of the top board. In FIG. 6, a one-touch key section 24 that can be easily set by pressing the heating power of the right heating means 5R once by a user is provided. The one-touch key section 24 includes three one-touch keys 25, 26, and 27. Yes. That is, the high heating key 27 for setting the heating power of the right heating coil 6R to 2.5 kW, the medium heating key 26 for setting to 750 W, and the low heating key 25 for setting to 300 W.
In order to set the heating power of the left heating coil 6L, a key similar to the one-touch key unit 24 is provided on the operation unit 22 (see FIG. 24), and the heating power of the left heating coil 6L is 2.5 kW and 750 W by one touch. And 300 W can be set.

  In FIG. 6, a strong heating power key 86 is provided at the right end portion of the one-touch key portion 24 and is pressed when it is desired to set the heating power of the right heating coil 6R to 3 kW.

  In the central display / input section (corresponding to the display means of the present invention) 80, the left heating coil 6L, the central heating means 7, the right heating coil 6R, and the two electric heating means 110A and 110B provided in the heating chamber 19 are provided. An energized state (thermal power, time, etc.) can be input or confirmed. This will be specifically described later.

  As shown in FIG. 6, the central operation unit 23 has an operation button 92 of an operation switch (not shown) for starting energization of the electric heaters 110A and 110B used for roast cooking, oven cooking, and grill cooking. And operation buttons 29 of operation switches (not shown) for stopping the energization 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 heaters 110A and 110B and the electromagnetic cooking by the left heating coil 6L and the right heating coil 6R one by one. Operation buttons 300 and 310 (not shown) are provided in a horizontal row.

Then, a convenient menu key 93 is provided, and a desired input screen or status display screen can be easily displayed on the central display / input unit 80 if pressed when setting one of fried food cooking, fried food preheating status display, and timer cooking. Can be read.
The deep-fried food cooking is cooking using the left heating coil 6L and the right heating coil 6R, and the deep-fried food preheating state display is the left heating coil 6L and the right heating coil 6R, and the oil is heated to a predetermined preheating temperature. It is a display of the heating state, and the timer cooking means that the left heating coil 6L, the right heating coil 6R, the central heating means 7 and the two electric heating means 110A, 110B provided in the heating chamber 19 are provided by a timer counter. It cooks by energizing only for the set time.
Further, an operation button 94 of a control switch (not shown) for operating on / off of the power supply of the central heating means 7 is provided.
Further, on the right side of the operation button 29, there is provided a right IH convenient menu button 93a including a hard button, which is a setting button for performing various settings for the right heating coil 6R. A similar setting button is also provided for the left heating coil 6L (not shown).

A start switch 34R of a timer counter (not shown) is provided at the right end portion of the operation unit 21, and when the user presses once, the time is measured from that point and is provided at the right front corner of the top plate 5. The display light is transmitted through the liquid crystal display portion 35R (located near the lower surface of the top plate 5 and above the top plate 5), and the elapsed time is displayed in units of minutes and seconds.
Similarly, when the user presses the deep-fried food selection switch 36R provided in the operation unit 21 once, the temperature of the oil in the deep-fried food (tempura) pan by the right heating coil 6R can be initially set to 180 ° C., and then the user Can set the heating power of the right heating coil 6R to any appropriate value suitable for fried foods by operating the operation dial 12R, for example, 200 ° C.
The left operation unit 22 has a switch 34L similar to the start switch 34R of the timer counter (not shown) and a liquid crystal display 35L having the same function as the liquid crystal display 35R for displaying the measurement time (see FIG. 1). ) And the deep-fried food selection switch 36L having the same function as the deep-fried food selection switch 36R for the left heating coil 6L are provided at left and right target positions with the left and right center line of the main body 1 in between.

The thermal power indicator lamp 40R for displaying the magnitude of the thermal power of the right heating coil 6R is located at the position corresponding to the position between the position corresponding to the right heating coil 6R and the operation unit 21 on the right front side of the top plate 5, and the top plate 5 is It is provided near the lower surface of the top plate 5 so that display light is emitted from the lower surface thereof to the upper surface side.
A thermal power display lamp 40L that displays the magnitude of the thermal power of the left heating coil 6L is located at a position corresponding to a position between the left heating coil 6L corresponding position and the operation unit 22 on the left front side of the top plate 5, and the top plate 5 is It is provided near the lower surface of the top plate 5 so that display light is emitted from the lower surface thereof to the upper surface side.

  The heating power display lamp 40R for the right heating coil 6R can display the heating power from 120 W to the maximum heating power of 3 kW in 12 stages, and details are as shown in Table 1.

  And in order to show these 12 steps | paragraphs of thermal power with light emission, the thermal power indicator 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 246 of the light emitting diode 1 is lit, and the red light is easily visible to the user from the surface of the top plate 5.

  In addition, as shown in Table 1, intermediate thermal powers of 563 W, 625 W, and 875 W are provided between 500 W and 1000 W, which is a medium thermal power region.

  Although the thermal power display lamp 40L for the left heating coil 6L is not shown in the drawing, it can display 11 levels from the thermal power 120W to the maximum thermal power 2.5kW. Yes.

  In addition, similar to the right heating means 6R thermal power display lamp 40R, three finer intermediate thermal powers of 563 W, 625 W, and 875 W are set.

The reason why the thermal power of 563W, 625W, and 875W is provided in this way will be described.
As a result of actual cooking in the medium-heat power region, with conventional thermal power such as 500 W and 750 W, the boiled food is inadvertently boiled and spilled, or conversely, a sufficiently high temperature heating state cannot be maintained. Thus, it has been found that various amounts of cooked food cannot be cooked with good thermal power control.
Therefore, an intermediate value of the conventional thermal power, for example, 625 W that is an intermediate value between 500 W and 750 W is added in this medium thermal power range, and 563 W that is an approximately intermediate value between 625 W and 500 W is added. For this reason, the user can adjust the thermal power more finely than the conventional thermal power control, and suppresses the boiling of the boiled food inadvertently or the state where sufficient high-temperature heating cannot be maintained, etc. In addition, various types of cooking can be performed well.

A central display / input unit (corresponding to the display means of the present invention) 80 is located on the front side of the left and right central part of the top plate 5. The central display / input unit 80 includes functions of the left heating coil 6L and the right heating coil 6R (whether cooking operation is being performed, etc.), a function of the central heating means 7 (whether cooking is being performed, etc.), and a heating chamber. 19 The operation procedures and functions for grill cooking inside (for example, whether roaster, grill, or oven cooking is currently being performed in the case of grill cooking) are displayed in characters, illustrations, graphs, etc. To do.
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). (See FIG. 4). This will be specifically described later.

The thermal power display lamp 60 is disposed slightly behind the central display / input unit 80 and displays the thermal power level of the central heating means 7. Similarly to the thermal power display lamp 40R, the thermal power display lamp 60 is provided in the vicinity of the lower surface of the top plate 5 so that display light is emitted from the lower surface through the top plate 5 (transmitted).
The thermal power indicator lamp 60 can display the thermal power from 100 W to the maximum thermal power 1500 W in five levels. Thermal power 1 is 100 W, thermal power 2 is 300 W, thermal power 3 is 600 W, thermal power 4 is 1200 W, thermal power 5 Is set to 1500 W, and in the same manner as the thermal power indicator lamp 40R, five light emitting diodes (not shown) are linearly arranged. For example, in the case of firepower 1, only the leftmost light emitting diode is lit, and the user can visually confirm from above the top plate 5 that the central heating means 7 is operating with 100 W of power consumption. it can.

  In FIG. 1, a door 70 covers the front opening 71 of the heating chamber 19 so as to be openable and closable, and is held in the heating chamber 19 by a support mechanism (not shown) so as to be movable back and forth. A window 72 provided in the center of the door 70 is covered with heat-resistant glass. In addition, a metal tray 73 is formed integrally with the door 70, and when cooking with a lot of oil, a metal grill (not shown) is usually placed on the tray 73.

  The right exhaust port 74 is provided on the upper surface of the rear portion of the frame body 4, and the surface is covered with punching metal, a net, and a fine lattice so that a user's finger or foreign matter does not enter.

  Similarly, the left exhaust port 75 is provided on the upper surface of the rear portion of the frame body 4, and the surface is covered with punching metal, a net, or a fine lattice so that a user's finger or foreign matter does not enter. The left exhaust port 75 and the right exhaust port 74 communicate with an internal space (an upper space 275 described later) of the main body 1 and communicate with the interior of the heating chamber 19 via an exhaust duct (not shown).

  High-temperature air (including oil smoke generated from the cooked food) generated in the heating chamber 19 is discharged via the left exhaust port 75 and the right exhaust port 74. In addition, fresh indoor air flows from the intake port (not shown) provided in the central wall of the rear part of the main body case 2 by the operation of the electric intake fan 316 (see FIG. 5) installed in the main body 1. Sucked inside. Then, the air cools the lower space 274 (see FIG. 4) and the periphery of the side surface located in the upper portion of the heating chamber 19 inside the main body 1, and then exhausts from the left exhaust port 75 and the right exhaust port 74.

  In FIG. 6, the above-described six various operation buttons 29, 92, 93, 94, 300, 310, 93a, etc. are covered with a thin resin film or metal film whose surface is resistant to water, cooking oil, etc. 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, the central operation unit 23 is provided with an input key group 91. This key group has six keys 83, 95, 96, 97, 98, 99 that can be operated independently. These keys have a thin resin film or metal film whose surface is cut off by oil of cooking. 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.

  As described above, the reason why the contact type input keys (see, for example, Japanese Patent No. 2712399) are not used as the operation buttons and the input keys of the central operation unit 23 is that such a contact type key has a capacitance. Since an input signal is generated when a change is detected, this type of cooker may malfunction when considering situations such as splashing of water or oil during cooking or when the user operates with wet hands. Not adopted due to concerns. As a result, higher reliability is ensured in the first embodiment, but the present invention can be realized even if the contact-type key is employed, and the press-type key is not necessarily used. .

The central display / input unit 80 includes a known dot matrix type liquid crystal screen. Therefore, it is possible to realize a high-definition screen (equivalent to QVGA with a resolution of 320 x 240 pixels, VGA (Video Graphics Array) capable of displaying 640 x 480 dots and 16 colors), and display characters Even when doing so, a large number of characters can be displayed.
FIG. 7 is an example in which the details are schematically displayed. As shown in FIG. 7, the screen area 81 for displaying information is assigned to a total of 10 areas,
Corresponding areas A1, A2 of the left heating coil 6L,
Corresponding areas B1, B2 of the central heating means 7,
Corresponding areas C1, C2 of the right heating coil 6R,
Corresponding area D of heating means 110A, 110B for grill and oven cooking,
Guide area E that displays cautions and reference information for various cooking to the user,
Six display keys 84, 100, 101, 102, 103, 104 that are adjacent to each of the input keys 83, 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. Since it is established by screen display software (microcomputer program), the area, shape, and position can be changed each time by the software. For the convenience of the user, the arrangement order of the heating means such as the left heating coil 6L, the central heating means 7 and the right heating coil 6R is always the same.

  Corresponding areas A1 and A2 of the left heating coil 6L include a first display area A1 that displays the normal state of the “first condition” setting such as the heating power (heating amount) for the left heating means, and the left heating coil 6L. Second display area A2 for displaying the setting state of “second condition” and the “physical quantity such as temperature, current, voltage” and the like (there are more types than the first condition) and the like These areas are composed of two areas.

  Similarly, the display areas B1 and B2 of the central heating means 7 are for the first display area B1 that displays the normal state of the “first condition” setting such as the heating power for the central heating means, and the central heating means 7. The second display area B2 for displaying the setting state of "second condition" and the abnormal state of "physical quantities such as temperature, current, voltage", etc. (there are more types than the first condition), It consists of two areas.

  Similarly, the corresponding areas C1 and C2 of the right heating coil 6R are for the first corresponding area C1 displaying the normal state of the “first condition” setting such as the heating power for the right heating means and the right heating coil 6R. The 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”, etc. (there are more types than the first condition), etc. It consists of two areas.

In FIG. 6, the 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. Operating keys 84, 100-104 by operating input keys (F1-F6, also referred to as function keys) 83, 95-99 arranged in close proximity to keys 84, 100-104. A corresponding operation signal is input to (an energization control circuit 200 described later).
In addition, as a method of individually displaying the six input keys 83 and 95 to 99, there are various methods such as highlighting characters on the key portions, lighting them with light emitting diodes, etc., emphasizing the colors and brightness of the key portions. However, in this embodiment, characters and symbols (such as arrows) necessary for setting various parameters (target heating means, heating temperature, time, energization amount, etc.) that are preconditions for the conditions that can be input are displayed. 84, 100-104.

  An information key (Tips key) 85 including a hard key is provided in front of the display key 104 on the right side. This key corresponds to the Tips display area G above the key 104, and when a specific symbol, for example, “○ i (i)” indicating reference information (information) is displayed in the display area, this key If the information key 85 is pressed, detailed information useful for cooking can be displayed in the guide area E of the central display / input unit 80 as shown in FIG.

8 to 17 are operation explanatory views showing 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. 8 are enabled (active state). In the figure, AM is an active mark schematically showing that it 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.

  Further, keys that are invalid even if they are operated in the display keys 84 and 100 to 104 are distinguished by gray-out (displaying the contrast and character content in a thin manner) or non-displaying (displaying only the key outline shape in a thin manner). I am doing so. In FIG. 8, only one display 84 is grayed out or hidden. Also, 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 is turned on.

In FIG. 8, 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, there is an effective operation in the energization control circuit 200 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).
That is, in the first embodiment, when the user looks at the central display / input unit 80, nothing is selected as an unnecessary display key so that a 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 means.

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 or light.
In other words, 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. 8, in a scene where the display key 100 is valid (because the active mark AM is lit), the function key 95 is also valid (active state).

In FIG. 8, 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 this key 84 because the display key 84 is displayed with an explanatory character “initial screen” but is already in the initial screen (the display itself of this initial screen is not displayed). The display key 84 may not be displayed, but is displayed for convenience of explanation).
In FIG. 6 and FIG. 8 and subsequent figures, the “return” display key 100 is pressed to return to the previous input screen or display screen in the course of inputting cooking conditions. The “initial screen” display key 84 is operated when it is desired to return to the initial screen at any stage.

FIG. 9 is a diagram illustrating a display example of the central display / input unit 80 and the input keys (function keys) 83 and 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 from the input key 86, and the control circuit displays the screen of FIG. 9 on the central display / input unit 80. Issue a command.
The area C2 of the right heating coil 6R in the central display / input unit 80 is automatically enlarged several times, and the character displayed in the display area C1 has a heating power level of 12 (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 86 again, In order to operate the display key 103 on which the symbol “→” for increasing the temperature 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, when setting to 5 minutes and then returning to 2 minutes, this function key 97 is active, so it can be pressed.

As shown in FIG. 9, the cooking time can be selected from 2 minutes, 5 minutes, and 10 minutes in the guide area E (corresponding to the alarm / guidance display area) of the central display / input unit 80, and the method for selecting the cooking time is as follows. The user can easily recognize that the 3 kW key 86 is pressed or the display keys 102 and 103 on which the symbols “→” and “←” are displayed are operated with the function keys 97 and 98.
In this way, the guide area E can display, for example, up to 50 characters, and the main display contents are explanations of the operation functions of various keys, assistance of operation procedures, and other important alarms. is there.

FIG. 10 is an explanatory diagram showing a display example of the central display / input unit 80 and the function keys 83 and 95 to 99 when the user presses the right IH convenient menu key 93a (see FIG. 6) from the state of FIG. It is. In FIG. 10, when the key 93a is pressed, the area C2 of the right heating coil 6R in the central display / input unit 80 is automatically enlarged, and various cooking menus (for example, fried food, stewed food) are on the left side. Is displayed, and it is understood that the thermal power level is initially set to 625 W (weak thermal power), which is 5 in 12 stages, as thermal power suitable for boiling.
Since this thermal power can be changed to a thermal power desired by the user in addition to the initial setting value, if the thermal power is to be decreased by one step and reduced to 563 W or less, if the function key 97 is pressed once to operate the display key 102, 1 Step down and press twice to reduce to 2 steps (500W). 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. 10 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 as described above, the time (0 minutes) is not lowered (shortened), and the function key 97 corresponding to the display key 102 is in an inactive state (this key 97 Nothing can be entered even if is pressed).

  If it is desired to set the heating power again without setting the time, if the function key 96 corresponding to the display key 101 is pressed from the state shown in FIG. ”Can be moved to“ thermal power ”displayed in the upper position, and the input target can be changed from the time field to the thermal power field.

Also, if you want to change the cooking menu from “Boiled” to “Cutting Timer”, press the function key 96 to cycle through “Boiled → Insulate → Fried Food → Cutting Timer”. good.
In addition, with the cut timer, the heating power of the left heating coil 6L and the right heating coil 6R is selected from levels 1 (120 W), 2 (300 W), 3 (563 W) to 8 (1 kW), 1 hour 30 minutes (90 The function is such that continuous cooking within minutes) can be performed by a timer, and for example, cooking can be performed by energizing the right heating coil 6R for 29 minutes with heating power 8 for 29 minutes. In addition, the heating means in the case of the off timer operation can also be used as the central heating means 7.

  In FIG. 10, the energization mark 50 indicates that the right heating coil 6R is energized and heated by lighting or blinking. The energization mark 50 appears at the right position where the names of the respective heating means are displayed as shown in FIG.

FIG. 11 shows a display example of the central display / input unit 80 and the function keys 83 and 95 to 99 when the user presses the right IH convenient menu key 93a and performs stewed cooking in the state of FIG. It is explanatory drawing. In this example, in the area C2 of the right heating coil 6R, it is displayed that the current cooking time is 33 minutes and the remaining time is 7 minutes with the setting for cooking for 40 minutes.
Thus, after selecting the heating means, when the cooking operation is started, the display areas A2, B2, and C2 of the specific heating means automatically return to the standard areas, and each display area as shown in FIG. The areas of A2, B2, and C2 are substantially equal. An energization mark 50 is displayed in the display area of the right heating coil 6R.

FIG. 12 shows a case where automatic grill cooking is performed when the user selects the grill cooking display key 103 and presses the function key 98 in the state of FIG. 8 (initial screen). When the function key 98 is pressed, the display area D of the electric heater for oven cooking / grill cooking in the central display / input unit 80 is automatically enlarged, and various cooking menus (for example, automatic) are displayed on the left side. Grill, manual grill, etc.) are displayed.
In the automatic grill, as shown in FIG. 12, in addition to “figure grilling”, a heating menu of “fillet”, “small fish”, “tsukeyaki” can be selected. This selection is made simply by pressing the function keys 97 and 98. In this case, every time the display key 103 (function key 98) is pressed, a menu of “image grill → fillet → small fish → tsukeyaki” appears. Further, if the display key 102 (function key 97) is pressed, it is possible to select by sequentially displaying “fillet → firing” in the reverse direction.

  Further, if the function key 96 is pressed and the display key 101 is operated, the color of the case of the appearance image can be set. In order to increase the printing color, the function key 98 is pressed after setting the baking color input mode, and on the contrary, the function key 97 is pressed to decrease the printing color. Each time you press it, the firing color changes by one step. Then, as shown in FIG. 13, cooking is started by operating the display key 104 corresponding to the start key with the function key 99 in the state where the level of baking color is set to 4.

  When cooking shown in FIGS. 12 to 13 is performed, in a state where the door 70 of the heating chamber 19 is opened, a caution message such as “○ i (i) grille door is open” is displayed in the display area E. . Further, as shown in FIG. 13, a message indicates that fish such as “sanma”, “aji”, and “sardine” can be grilled.

FIG. 14 is an explanatory diagram showing a display example of Tips. "Tips" is handled in the sense of useful information and bean knowledge, and is a situation where the user wants to know useful functions, cooking points, and content that solves user confusion by automatic control. Provided to inform. The first embodiment is mainly used as a how-to measure to make IH cooking more comfortable.
The operation is performed by pressing an information key (Tips key) 85 (see FIG. 6) that is a hard key corresponding to the “○ i (i)” icon (i is an acronym of information) displayed in the display area G. The corresponding content is displayed when pressed.

In addition to the display contents shown in FIG. 14, for example, there are the following examples.
(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 equipment-specific rice cake (baking unevenness, etc.) regarding cooking in general.
(4) Requests for safety of cooking equipment, alarm contents, and response methods for alarms.
If the user wants to know the guideline for adjusting the grilling color of the automatic grill in FIG. 14, the user presses the function key 98 and operates the display key 103 to switch the display screen to the next page.

“Automatic grill” cooking in FIG. 13 and FIG. 14 is built in the energization control device 200 of the cooker immediately after the start of cooking according to conditions such as the type and size of the object to be heated, and the setting of the baked color. The microcomputer looks at the temperature rise state of the heating chamber 19 and calculates the time until cooking is completed. The calculation result is shown as a guide time, as shown in FIG. is there.
On the other hand, “manual grill” means that the cooking time can be set freely. If you want to increase the degree of baking after the automatic grilling is finished, you can use this manual grill after the automatic grilling is finished. it can. In addition, after cooking is completed, the energization control circuit 200 may automatically clean the heating chamber 19 (the smoke removal filter that acts to decompose smoke is energized for a certain period of time). Etc. are displayed in the display area E.

  In addition, as shown in FIG. 15, when it is left as it is for 30 seconds or more despite the alert that “the grill door is open”, hot air leaks out from the heating chamber 19, and the temperature in the heating chamber Since it does not rise sufficiently, the microcomputer of the energization control circuit 200 is programmed so that the setting of cooking conditions becomes invalid. At this time, a caution message as shown in FIG. 15 is issued to urge the user to make a correct use state.

In the state shown in FIG. 15, the “left IH fried food temperature is 180 ° C.”. This means that the left heating coil 6L is energized, and the energization time is initially set to 20 minutes in this cooker (after the start of cooking, it is counted down from this 20 minutes and displayed in increments of 1 minute. Meaning). “Setting 180 ° C.” means that the left heating coil 6L is energized and the temperature of the oil in the tempura pan is set to 180 ° C.
As described above, the control program may be designed so that the initial setting (default) time is not set to 20 minutes, for example, 10 minutes.
Further, in the state of FIG. 15, the display key for selecting the central heating means 7 is not displayed. Since the function key 96 corresponding to the display key 101 is also in an inactive state, no valid command is input to the energization control circuit 200 even if the key 96 is pressed. During the grill / oven cooking as described above, the central heating means 7 cannot be used at the same time in order to keep the power consumption of the entire cooking device within a certain range.

By the way, the central display / input unit 80 can greatly change the areas of the display areas of the second display areas A2, B2, and C2 according to the contents to be displayed so that the user can visually confirm. It is. The second display areas A2, B2, and C2 include a “second condition” setting state such as cooking time and set temperature and an abnormal state of “physical quantities such as heating temperature, current, and voltage” in each display area. Two are displayed.
For example, when the control condition of the left heating coil 6L is set or confirmed, the target area A2 has a larger area (as compared to the state of FIG. 15) as shown in FIG. Can be enlarged. That is, in the state of FIG. 15, if the function key 95 (in an active state) is pressed in order to input the display key 100 displayed with “left IH” and characters or symbols, the state shown in FIG. Since the display changes, the user can confirm information necessary for cooking the left heating coil 6L.

In FIG. 16, the oil heating temperature is initially set to 180 ° C., but if the function key 97 corresponding to the display key 102 is pressed, the temperature can be decreased by 1 ° C., and conversely, the display key 103 By pressing the corresponding function key 98, the temperature can be raised by 1 ° C.
The energization time is initially set to 20 minutes, but if the function key 96 is pressed, the input item can be switched from “temperature” (eg, 180 ° C.) to “time”. When the function key 99 corresponding to the display key 104 is pressed after the time input mode is set in this way, fried food cooking is started under the above conditions (at the start stage, “Left IH” as shown in FIG. 16). The energization mark 50 is lit on the right side of the display.
In this case, in the display area E, for example, “Please cook with an oil amount of 0.6 L or more” is displayed to the user, and the oil used for fried food should be 0.6 liters or more. The character display that gives the attention is displayed. That is, it has a function of displaying precautions such as the amount of oil necessary for cooking fried food and the heating temperature. For example, if only 0.2 liter of fried food oil is put in a pan and heated, the oil may rise to 300 ° C. or higher depending on the heating power of the heating means, which may cause a fire accident.

FIG. 17 shows a state (initial screen) of FIG. 8 in which the user uses the right heating coil 6R and cooks the grill during the use. When the right heating coil 6R is used first, the display keys 84 and 100 to 104 are in the states shown in FIGS. That is, as shown in FIG. 15, the word “grill” is displayed on the display key 103 and the corresponding function key 98 is also in an active state. If this key 98 is pressed, the display area for grilling and oven cooking is displayed. 17 is enlarged. In this state, in the display area C2 indicated as “Right IH” indicating the right heating coil 6R, the energization display mark 50 is lit (or blinking), and it is understood that the right heating coil 6R is being heated.
On the other hand, the central heating means 7 and the left heating coil 6L are not used because the display area B2 and A2 do not display the energization display mark 50 or other characters or pictures indicating that energization is being performed. I understand). The screen in the state of FIG. 17 shows the energization state of all the heating coils 6L, 6R, 7, 110A, and 110B as shown in FIG. Automatically returns to the initial screen.

FIG. 5 is a diagram showing the entire control circuit of the cooking apparatus. In FIG. 5, the energization control circuit 200 includes one or a plurality of microcomputers, and is composed of an input unit, an output unit, a storage unit, and an arithmetic control unit, and a DC power source is connected via a constant voltage circuit 232. Have been supplied. The energization control circuit 200 serves as a control means for controlling all the heating coils (heating means) and the display means (central display / input unit 80) in the present invention.
The commercial power source 202 supplies 200V to the main circuit buses 202A and 202B, and the main power switch 201 is provided on one bus bar 202A of the main circuit. Then, the circuit 206R is for the right heating coil 6R connected in parallel to the power source 202, the circuit 206L is for the left heating means (6L) configured similarly to the right heating means circuit 206R, and the circuit 207 is the central heating. As a circuit for the means 7, a circuit 208 is provided for the heating means for the grill oven.

The right heating means circuit 206R includes an induction heating coil 220, a rectifier bridge circuit 221 having an input side connected to the buses 202A and 202B, and 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. A flywheel diode 226 is connected between the emitter and collector of the IGBT 225 so that its anode is on the emitter side.

In FIG. 5, a current detection sensor 227 detects a current flowing through a resonance circuit 225 formed of a parallel circuit of a heating coil 220 and a resonance capacitor 224, and this detection output is supplied to the input unit of the energization control circuit 200. Is done. When an undercurrent or an excessive current is detected in comparison with the normal current value due to an accident or the like when a pan that is inappropriate for induction heating is used, the energization control circuit 200 causes the IGBT 225 via the drive circuit 228. Is controlled, and the energization of the induction heating coil 220 is instantaneously stopped.
The right heating means circuit 206R includes the induction heating coil 220, a DC circuit composed of the coil 222 and the smoothing capacitor 223, a drive circuit 228, the IGBT 225 controlled by the drive circuit, the resonance circuit 220, The flywheel diode 226 and the rectifier bridge circuit 221 are configured.

  Since the left heating means circuit 206L has the same circuit configuration as the right heating means circuit 206R, the description thereof is omitted. The maximum heating power of the left heating coil 6L is 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 coil 6R.

  Although not shown, the current detector 227 is also provided in the left heating circuit 206L, the grill / oven heating circuit 208, and the central heating circuit 7 207 in the same manner.

  The circuit 207 for the central heating means 7 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 generates an infrared optical signal based on the drive signal output from the energization control circuit 200, and a plurality (only three are shown in FIG. 5) on the drive output side. Infrared LEDs 234, 235, and 236 are connected in series. 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.

The ventilation device 239 is not a part of the configuration of the cooker according to the present invention, and is not an essential device or part of the cooker of the present invention. It is installed in the upper part of the side wall of the kitchen above the installation space of the cooker. The control unit of the ventilation device 239 includes a photodiode 240 serving as an infrared light receiving element, a receiving circuit 241, and a control circuit 242.
The fan motor 243 drives an exhaust fan for ventilation. 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. Driven by a signal.

  The drive circuit 244 drives the liquid crystal screen of the central display / input unit 80, and a drive signal is input from the energization control circuit 200.

The drive circuit 245 turns on the heating power display lamp 40R of the right heating coil 6R, and a drive signal is input from the energization control circuit 200.
As shown in FIG. 5, the thermal 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. Further, the heat display lamp 40L for the left heating coil 6L is configured in the same manner, but the number of light emitting diodes is eleven.

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

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

In FIG. 5, the cooling fan drive circuit 260 is for keeping the internal space of the main body 1 in a certain temperature range. In addition, the temperature detection circuit 311 includes
In the vicinity of the electric heater 231 of the circuit 207 for the central heating means 7, a temperature sensor S1,
A temperature sensor S2 at the bottom of the induction heating coil 220 of the circuit 206R for the right heating coil 6R;
A temperature sensor S3 on the rear upper surface of the liquid crystal display panel of the central display / input unit 80;
A temperature sensor S4 at the bottom of the holding frame 330L of the induction heating coil of the circuit 206L for the left heating coil 6L;
A temperature sensor S5 on the ceiling of the heating chamber 19,
A temperature sensor S6 (see FIG. 3) at the ceiling of the inlet of the cooling duct 372R of a plurality of high voltage electrical components (power transformer, high frequency inverter control circuit components, etc.) 371R provided in the right space 370R inside the main body 1;
A temperature sensor S7 (see FIG. 3) on the ceiling surface of an aluminum heat dissipation panel 373R to which a part of the high voltage electrical component 371R is attached;
Are mounted and arranged.

The temperature sensor S2 and the temperature sensor S4 are composed of a pair of temperature sensors, and the right heating coil 6R is an abbreviation of the ferrite plate (magnetic flux leakage prevention plate) 331R that covers the lower surface of the metal container-like holding frame 330R. One temperature sensor S2B is attached to the center (substantially below the center of the induction heating coil 220 wound in a disk shape), and is slightly inside the holding frame 330R and to the cooling fan 262 side position described later from the center line of the holding frame. Another temperature sensor S2A is arranged at a distant position.
Similarly, temperature sensors S4A and S4B are provided at positions opposite to the temperature sensors S2A and S2B of the right heating coil 6R across the left and right center line of the main body 1, respectively.

The purpose of providing two temperature sensors in the left heating coil 6L and the right heating coil 6R in this manner is that the windward position from the cooling fans 262 and 315 described later in the holding frames 330R and 330L, and the holding The temperature is measured more accurately by measuring the temperature at two locations apart from the bottom center of the frames 330R and 330L.
The pair of temperature sensors S2A, S2B and the pair of temperature sensors S4A, S4B have different temperature detection states and different reference temperatures for determining abnormal temperatures, but the left heating coil 6L and the right heating coil 6R are the main ones. Since it is a heating means and becomes a high temperature, a pair of temperature sensors are provided and monitored twice.

Similarly, as shown in FIG. 3, a cooling duct of a plurality of high-voltage electrical components (power transformer, high-frequency inverter control circuit components, etc.) 371L is provided in the left space portion 370L inside the main body 1 as well as the right space portion 370R. The temperature sensor S8 is arranged on the ceiling surface of the 372L and the entrance portion thereof, and the temperature sensor S9 is arranged on the ceiling surface of the heat radiation panel 373L made of aluminum to which high-voltage electrical components are attached.
The circuit board 390 is supported by a plurality of legs 391 that are inside the two cooling ducts 372R and 372L and fix the high-voltage electrical components 371R and 371L.

  As shown in the cross-sectional view of FIG. 2, the inside of the main body 1 has a left partition plate 374L and a right partition plate having dimensions that extend from the inner bottom surface of the main body 1 to the ceiling surface so as to sandwich the heating chamber 19 from both sides. 374R is provided, and the left space portion 370L and the right space portion 370R are partitioned and formed between the left partition plate 374L, the right partition plate 374, and the left and right side walls of the main body case 2.

  The cooling duct 372R having an inverted U-shaped cross section provided in the right space 370R is formed of a material having good thermal conductivity such as aluminum, and the cooling fan 261 provided in the inlet portion on the inside thereof. Is supported by the motor FM. When the motor FM is driven, outside air is sucked into the right space 370R as shown by an arrow F1 in FIG.

  Similarly, a cooling duct 372L having an inverted U-shaped cross-section is also installed in the left space 370L, and a cooling fan 263 and a motor FM are installed inside the inlet, and at the time of driving the motor FM, Outside air is sucked into the left space portion 370L as shown by an arrow F1 from a large number of intake holes (not shown) formed at the left side of the back surface of the main body case 2.

  Near the ceiling surface in front of the right space 370R, a cooling fan 262 having a casing 377R with suction ports 376R formed on the upper surface and the lower surface is disposed horizontally, and rises from the outlet of the cooling duct 372. The incoming air is sucked in through the suction port 376R and blown out to the right front corner portion of the upper space 275 of the metal partition plate 334 that divides the interior of the main body 1 vertically above the heating chamber 19 (as indicated by the arrow F3).

  Similarly, a cooling fan 315 having a casing 377L in which suction ports 376L are formed on the upper surface and the lower surface is horizontally disposed near the ceiling surface in front of the left space portion 370L, from the outlet portion of the cooling duct 372. The ascending air is sucked through the suction port 376L, and blown out to the left front corner portion of the upper space 275 of the metal partition plate 334 that vertically partitions the interior of the main body 1 above the heating chamber 19 (as indicated by the arrow F3). . The cooling fan 262 is installed on the rotating shaft 262B of the driving motor, and similarly, the cooling fan 315 is installed on the rotating shaft 315B of the driving motor.

  A casing 377R of the cooling fan 262 passes through the window 379R provided in the right partition plate 374R. Similarly, the casing 377L of the cooling fan 315 passes through the window 379L provided in the left partition plate 374L.

In FIG. 5, the temperature data from the nine temperature sensors S <b> 1 to S <b> 9 are all input to the energization control circuit 200 via the temperature detection circuit 311. Then, the fan drive circuit 260 always operates the cooling fans 261, 262, 263, 315, and 316 so that the respective temperature measurement portions do not become higher than a predetermined temperature according to the temperature measurement situation from the temperature detection circuit 311. Cooling with the generated wind.
However, if the temperature still rises above the predetermined temperature, an abnormal temperature signal is input from the temperature detection circuit 311 to the energization control circuit 200, and the power to the heating means such as the left heating coil 6L, the right heating coil 6R, and the electric heater 231 is shut off. Protection signals for safe operation are output from the energization control circuit 200 to each heating means.
That is, the abnormality detection means includes the energization control circuit 200, the temperature detection circuit 311, the current detection sensor 227, and the like. The operation of each cooling fan will be described in detail later.

In FIG. 2, guide plates 378R and 378L are installed on the upper surface of the partition plate 334 at positions in front of the air outlets 262A and 315A of the cooling fans 262 and 315, have a V shape, and extend from the cooling fans 262 and 315. The cooling air is distributed to the central display / input unit 80, the left heating coil 6L, and the right heating coil 6R.
That is, an air flow F3 for cooling the central display / input unit 80 and air flows F5 and F4 for cooling the left heating coil 6L and the right heating coil 6R from both sides are formed. Finally, the air is exhausted from the right exhaust port 74 and the left exhaust port 75 as shown by an arrow F8 in FIG.

  The pair of guide plates 380R and 380L are installed on the partition plate 275 in a square shape so as to narrow the rear side of the upper space 275 of the partition plate 334 toward the rear, and exhaust air flows F4, F5, and F6. It has a role of collecting up to just below the mouths 74 and 75.

FIG. 4 is a top sectional view of the cooking device of FIG. As shown in FIG. 4, the space between the lower surface of the top plate 5 and the heat insulating material 300 covering the entire ceiling surface of the heating chamber 19 is partitioned into two upper and lower spaces by a partition plate 334, and the upper space 275 A lower space 274 is formed.
The blower fan 314 is installed inside the lower space 274 and sucks room air from an intake hole (not shown) provided in the center of the rear part of the main body case 2 so as to be above the heating chamber 19 in the main body 1 (downward). The cooling air is sent to the space 275) in either a clockwise direction or a counterclockwise direction to create a wind flow F7 below the lower space 274 and finally discharged from the exhaust ports 74 and 75.
Note that the upper space 275 and the lower space 274 are partitioned by a partition plate 334, a duct (not shown) and the like until reaching the exhaust ports 74 and 75, and do not intersect in the middle, and thus flow through both spaces 274 and 275. Air does not cause mutual interference and is discharged separately from the main body 1.

  The two cooling fans 262 and 315 are installed such that their blowout ports face the upper space 275 of the partition plate 270. During operation, the air sucked from the suction ports 376L and 376R is also taken into the upper space 275. To the front part of

As shown in FIG. 4, a 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 covered with a heat insulating material 281 on the bottom surface side, and is stored in a metal case 282 having only an upper surface opened, and is fixed by the case 282 so as to keep a predetermined gap 283 from the lower surface of the top plate 5. Yes.
A large number of communication holes 271 are formed over the entire circumference of the case 282, and a part of the wind from the cooling fans 262 and 315 passes above the liquid crystal substrate 280 so that the liquid crystal substrate does not reach a high temperature. A plurality of radiating fins 282A are integrally formed on the bottom surface of the case 282 so as to be substantially parallel to the wind flow direction (front-rear direction; left to right in FIG. 4), so that the air cooling performance of the case 282 is enhanced. It is.

  As shown in FIG. 4, when a large (large caliber) pan N cooked deep-fried food such as tempura is placed on the top plate 5 for a long time, the pan position is displayed in the center of the regular position. If it is placed too close to the input unit 80, the heat from the pan N is likely to be transmitted to the central display / input unit 80, which may cause the temperature to rise abnormally. The flow of cooling air is improved.

Also in FIG. 4, the infrared LED 234 shown in FIG. 5 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. Although not shown, the other infrared LEDs 235 and 236 are also placed in a line immediately next to the top plate 5 and radiate infrared drive signals toward the ventilator 239.
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.

On the metal mounting board 292, various input switches of the upper surface operation unit 20, for example, an operation switch operated by the operation button 92, a plurality of switches operated by the input key 97, and main components constituting the energization control circuit 200 are configured. An electrical component group 298 related to the upper surface operation unit 20 such as a “display” microcomputer as one of the components is mounted.
A large number of communication holes 297 are formed in the mounting substrate 292 at regular intervals, and a part of the cooling air sent from the cooling fans 262 and 315 to the upper space 275 enters the space part 295 through the communication holes 297, The electrical components 298 are prevented from becoming hot due to the influence of heat transmitted through the plate 5.

  As shown in FIG. 2, the case 282 around the liquid crystal substrate 280 and the top plate 5 around the case 282 are exposed to the cooling air flow F3 sent from the cooling fans 262 and 315, and thus are cooled. . At the same time, the electrical components 298 are also cooled.

  The control board 299 fixes the electrical components 298 to the mounting board 292, and is fixed by mounting legs 293. The wiring 93A connects the operation switches and electric parts of the central operation unit 23, and the wiring 296 is connected to the function keys 83 and 95 to 99.

  Sealing seal packing material 333 seals between the six function keys 83, 95 to 99, etc. and the frame body 4. The connection line 93A of the switch 93 and the connection line 296 of the function key 97 are connected to the switches 298, respectively. It is connected.

In FIG. 5, when the energization control circuit 200 is disconnected from the commercial power source 202 by the power switch 201, the standby power source 400 supplies power in place of the commercial power source, and is composed of, for example, a rechargeable battery. Therefore, when a problem such as an abnormal current is electrically generated between the commercial power source 202 and the energization control circuit 200, and the energization control circuit 200 itself opens the power switch 201 when it is dangerous as it is, the standby power source 400 is connected. Have been used.
The energization control circuit 200 includes a nonvolatile semiconductor storage memory (not shown) that stores information from when an abnormality occurs in the cooking device until the commercial power is turned off. This is so that when the cooker is started again next time, the energization control circuit 200 determines the previous failure or malfunction and does not inadvertently energize. Also, a cooker repair company or manufacturer can read out the failure history of the memory and use it for repair.

Next, the outline | summary of operation | movement of the heating cooker which consists of the said structure is demonstrated based on a flowchart. Hereinafter, each step is abbreviated as “ST”.
FIG. 18 is a flowchart showing the basic operation from turning on the power to the start of cooking preparation. In FIG. 18, such an operation program is stored in a microcomputer inside the energization control circuit 200.
First, the power plug is connected to a 200V commercial power source, and the power switch 201 is pressed (ST-1).
Then, a predetermined low power supply voltage is supplied to the energization control circuit 200 via the constant voltage circuit 232 (ST-2).
Then, the energization control circuit 200 is activated, and self-diagnosis and check of its own control program are performed. If there is no abnormality, the cooling fan drive circuit 260, the left and right heating coil 6R drive circuit 228, the central display / input unit 80 The driving circuit 244 of the liquid crystal display unit is activated (ST-3).
Further, the drive circuit 228 passes a small amount of power through the left heating coil 6L and the right heating coil 6R, and checks that there is no abnormality in the circuit configuration from the state of the current (ST-4).

Furthermore, the drive circuit 260 starts operation of the cooling fans 261, 262, 263, 314, and 315 at a predetermined rated current (ST-5).
The temperature detection circuit 311 reads temperature data from the temperature sensors (S 1 to S 9) provided at a total of 11 locations, and sends the data to the energization control circuit 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 21 ° C. or less (49 ° C. or less) 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 (ST-7). On the contrary, when it becomes 50 degreeC or more, it determines with abnormally high temperature.

  Next, the current detection sensor 227 detects a current flowing through the resonance circuit 225 formed of a parallel circuit of the heating coil 220 and the resonance capacitor 224, and this detection output is supplied to the input unit of the energization control circuit 200. If an undercurrent or an overcurrent is detected in comparison with the normal current value due to some accident or poor continuity, the energization control circuit 200 determines that there is an abnormality (ST-8).

If there is no abnormality determination in the above steps (ST-7, ST-8), preparation for cooking start is completed (ST-9).
However, when abnormality determination is performed, processing according to abnormality processing 1 is performed as shown in FIG.

The operation of the abnormal time process 1 is shown in FIG.
First, it is determined whether or not the abnormal state can be corrected by the cooking device from the content of the abnormality (ST-10).
For example, when the temperature of the central display / input unit 80 is not lower by 20 ° C. or more than the heat-resistant temperature of the liquid crystal display unit (for example, 70 ° C.) but 15 ° C. (that is, 55 ° C.), the liquid crystal display unit is It is cooled strongly by the cooling fan 262, or a high-temperature cooking utensil (for example, a pan immediately after tempura) is placed on the top plate 5 near the upper part of the liquid crystal display section of the central display / input section 80. In some cases, it is only necessary to alert the user to move the pan.
However, if abnormal data is received that indicates that the abnormal state cannot be directly corrected by the cooker itself (including prompting the user to move the pan as described above), the abnormal condition is immediately detected from ST-10. Display operation 1 (ST-13) is entered.

  Therefore, the abnormality correction process is executed for the abnormality information determined to be correctable. For example, as described above, when the temperature of the central display / input unit 80 is not lower by 20 ° C. or more than the heat-resistant temperature (for example, 70 ° C.) of the liquid crystal display unit, 15 ° C. (that is, 55 ° C.) In order to cool the liquid crystal display unit strongly by the cooling fan 262, the operation is continued by increasing the power supplied to both the cooling fan 261 and the cooling fan 262 by 5% from the normal time (execution of abnormality correction processing: ST-11).

  Then, the cooling fan 261 and the cooling fan 262 are monitored at intervals of 30 seconds after the strong operation, and after a predetermined time (for example, 3 minutes), the temperature of the central display / input unit 80 is again measured by the temperature sensor S3. If the detected temperature measured by the above is worse than before the correction process is executed and exceeds 60 ° C., it is determined that the state is “dangerous” (ST-12).

Then, a warning message 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 (ST-13).
If the abnormally high temperature is not resolved within, for example, 1 minute, the energization control circuit 200 operates the cooling fan 261 and the cooling fan 262 until it drops to 49 ° C. or less (however, for example, 5 minutes at the longest). After that, the connection is switched to the standby power source 400, the power switch 201 is forcibly opened, and the commercial power source 202 is disconnected (ST-14).
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.

Then, after elapse of a predetermined time (for example, 10 minutes) from the time when the abnormality display 1 (ST-13) is displayed on the central display / input unit 80, the energization of the central display / input unit 80 is cut off via the drive circuit 244 (ST-). 14).
Then, the history from ST-10 to ST-14 after the occurrence of an abnormality, abnormal temperature data, etc. are stored in a non-volatile memory (not shown) of the energization control circuit 200 (ST-15).
Thus, the abnormality process 1 is completed.

  Next, the case where the cooking mode is shifted to after cooking pre-cooking abnormality monitoring processing in FIG. 18 will be described. FIG. 20 shows an example in which the right heating coil 60R (right IH) is used. First, the operation dial 12R of the front operation unit 10 is turned "right or left" (the heating power is set according to the amount turned (ST-16)).

  An operation signal from the front operation unit 10 is input to the energization control circuit 200, and various input key (such as 95) operation signals from the upper surface operation unit 20 are input to the energization control circuit 200. Cooking conditions are set (ST-17).

  The energization control circuit 200 drives the drive circuit 228 and drives the right heating means circuit 206R. Further, 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 (ST-18).

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 (ST-19).
Thereby, the pan becomes high temperature by the high frequency magnetic flux from the heating coil 220 (ST-20).
Thereafter, the electromagnetic induction overheating cooking operation (cooking mode) is entered (ST-21).

  As shown in FIG. 20, the abnormality monitoring control during cooking is performed in three monitoring stages: abnormal heating monitoring process (ST-22), abnormal voltage monitoring process (ST-23), and abnormal current monitoring process (ST-24). have.

The abnormal heating monitoring process (ST-22) is the same as that shown in ST-7 of FIG. 18, but after heating cooking is started, the cause of overheating is the left heating coil 6L, the right heating coil. 6R, central heating means 7 and the like are added (however, in the example shown in FIG. 20, since the right heating coil 6R is used, the right heating coil 6R can be a leading cause of overheating).
In addition, the abnormal current monitoring process (ST-24) is performed when an unsuitable pan or the like is used for induction heating as described above, or when an undercurrent or an overcurrent is compared with a normal current value due to some accident or the like. If detected, 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 instantaneously stop the energization of the induction heating coil 220. is there.

  The abnormal heating monitoring process ends when the energization control circuit 200 receives a heating (cooking) end signal as shown in ST-25 or when it receives a heating stop command signal from the user. If it is determined that there is an abnormality in this series of heating abnormality monitoring control, the abnormality process 2 is performed. This will be described separately with reference to FIG.

As shown in FIG. 21, the abnormality monitoring control includes two stages of abnormality monitoring control during cooking of various heating means and abnormality monitoring control of the cooker body 1.
The heating means abnormality monitoring during cooking is performed by ST-26 for monitoring the abnormality of the right heating coil 6R, ST-27 for monitoring the abnormality of the left heating coil 6L, ST-28 for monitoring the abnormality of the central heater 7, heating for grill cooking, etc. It consists of ST-29 for monitoring the abnormality of the chamber 19.

  In addition, the abnormality monitoring control of the cooking device main body 1 during cooking includes temperature abnormality monitoring (ST-30) of the main body right electric control board (inside the right duct 272R), main body left electric control board (inside the left duct 272L). ) Temperature abnormality monitoring (ST-31) and central display / input unit 80 temperature abnormality monitoring (ST-32). This ST-32 is the same monitoring process as ST-7 (see FIG. 18).

Next, the process at the time of abnormality in an actual cooking process is demonstrated based on FIG. Further, reference is made to FIGS. 23 to 35 showing transitions of the display screen of the central display / input unit (screen 1 to screen 12) in the abnormality occurrence state.
If any of ST-26 to ST-32 in FIG. 21 is determined as “abnormal”, the process proceeds to “abnormal processing 2” in FIG.
For example, in ST-26, when the temperature detected by the temperature sensor S2 reaches 280 ° C., it is determined that the temperature is abnormally high. In ST-32, the temperature detected by the temperature sensor S3 is 50 ° C. exceeding 21 ° C. (49 ° C. or less) lower than the heat resistant temperature (eg, 70 ° C.) of the liquid crystal display portion of the central display / input unit 80. In this case, it is determined that the temperature is abnormally high (as described above, 280 ° C. and 50 ° C. are the determination reference values for each abnormality).
In the process 2 at the time of abnormality, it is first determined whether or not abnormality correction is possible (ST-34). The process at the time of abnormality 2 has the same basic concept as ST-10 for determining whether or not abnormality correction is possible in FIG.

If it is determined in ST-34 that the abnormality can be corrected, whether the next occurrence of abnormality is the heating means (left heating coil 6L, right heating coil 6R, central heating means 7 or the like). To be judged.
That is, if a heating command has been given to a specific heating means (for example, the right heating coil 6R) before this, and cooking is being heated at the time of occurrence of the abnormality, the abnormality monitoring step (ST-26) of the heating means is concerned. ) Can determine that the right heating coil 6R is a source of abnormality.
Similarly, even when an abnormal current is sent from the current detection sensor 227 of the right heating means circuit 206R to the energization control circuit 200, it can be determined that the right heating coil 6 is the source of the abnormality.

  If it is determined that an abnormality has occurred in the heating means, the display area of the abnormal heating means is enlarged in the central display / input unit 80 as shown in ST-36. For example, when an abnormality occurs in the right heating coil 6R, the display area C2 is enlarged (screens 3 and 4). If it is determined that no abnormality has occurred in any of the heating means (as can be seen from the fact that all the heating means are stopped), for example, the temperature of the central display / input unit 80 has risen abnormally. In this case, the area of the display area F is enlarged to several times, and the content of the abnormality is clearly indicated in the area (see ST-37, screen 2).

  After maintaining the time when the user can fully recognize the state where the display area C2 is enlarged (for example, after several minutes), the screen automatically returns to the original area area, and an abnormality occurs as shown in the screen 4. Under the name of the right heating coil 6R, a warning indication “high temperature abnormality” is displayed in red letters or the like. The screen may be returned to the original state when the user sufficiently confirms and performs a confirmation key operation without automatically returning to the screen 4.

  Alternatively, the screen 4 and the screen 5 may be switched at a speed (predetermined time) interval at which the user can visually confirm the screen, and the screen may be displayed alternately. Such a display is performed, and a message requesting attention, cooperation, and confirmation for correcting an abnormal state is performed in the display area E. In the examples of screens 4 and 5, the upper portions of the exhaust ports 74 and 75 (see FIG. 1) of the main body are not blocked with cooking utensils or the like, and the back of the intake holes 375 (see FIG. 3) is not blocked with cloth or other objects. So that you are alerted.

Next, an abnormality correction process is executed in ST-39 for an abnormality that is determined to be correctable. For example, when it is determined that the right heating coil 6R is at an abnormally high temperature, the energization control circuit issues a correction command in the following order.
1) In order to increase the number of rotations of the cooling fan 262 that air-cools the heating coil of the right heating means and the cooling fan 261 on the upstream side thereof, the energization amount is compared with that during normal operation (for example, 5% ) Increase the cooling air volume. If the effect of improvement does not appear even if this state continues for 1 minute, then 2) lower the heating power (electric power) of the right heating means (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 addition, as shown in screen 5, the display area C2 displays a notice that the thermal power is automatically reduced (note that repeating this thermal power down process several times is also an effective measure, but for convenience of explanation. The case of a process of only one thermal power down will be described).

Within a predetermined short time from the state of screen 4 or screen 5 (for example, within 1 to 3 minutes from the time when abnormality occurred in right heating coil 6R and display area C2 was expanded), the high temperature abnormal state was resolved. In order to confirm whether or not, the energization control circuit 200 again determines whether or not there is an abnormality (ST-40).
Since the temperature detection itself is performed every few seconds and the energization control circuit 200 re-determines whether there is an abnormality each time, the detected temperature of the temperature sensor S2 of the right heating coil 6R is predetermined even within one minute. When the temperature (for example, to 300 ° C.) or 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-determination process for the presence or absence of the abnormality (ST-40). Therefore, it is determined as “dangerous state” (ST-41).
When the abnormal state is determined, the energization of the right heating coil 6R is stopped as it is immediately displayed on the screen 6 or 7 (ST-42).
Therefore, when the user looks at the screen 6, the screen 7, and the screen 8, it can be easily understood that the automatic stop has occurred due to abnormal temperature rise.

  In the re-determination process (ST-40A), it is equal to or less than the determination reference value determined as abnormal in ST-26 to ST-32 in FIG. 21 (for example, the temperature of the right heating coil 6R is less than 280 ° C., and the center display / input Unless the temperature of the section 80 returns to 49 ° C. or lower), the normal cooking operation (normal cooking mode, see ST-21 in FIG. 21) is not restored, and the process returns to ST-40 of the redetermination process. Repeat that. When it is determined that the value has returned below the determination reference value, the process returns to ST-21 in FIG. 20, and thereafter, the heating unit abnormality monitoring and the main body abnormality monitoring shown in FIG. 21 are continuously performed during cooking.

Note that an energization stop command for the right heating coil 6R is issued, and energization of the right heating means is stopped (ST-44).
However, the cooling fan 262 that cools the heating coil of the heating means continues to operate for 2 to 5 minutes thereafter (however, an abnormal current from the cooling fan 262 is detected or the like is detected) If it is found, the power supply to the cooling fan is stopped at the same time, and the duration of the operation depends on conditions such as the temperature rise until the power supply is stopped, the room temperature, and the operating thermal power of the heating means. Correspondingly, the energization control circuit 200 is determined from a predetermined formula or numerical value table).
Thereby, the overshoot problem that the temperature of the right heating coil 6 </ b> R rapidly increases immediately after the stop of the blowing from the cooling fan 262 can be prevented. Further, it is possible to prevent the adverse effect that the temperature of the central display / input unit 80 becomes high.

On the other hand, when the central heating means 7 is also used while the right heating coil 6R is used, the cooling fan 315 is also operated simultaneously with the operation of the cooling fan 262. In this case, the right heating coil 6R is energized. Even if the operation is stopped, the cooling fan 262 continues to operate.
This is because, as shown in FIG. 2, the central heating means 7 is characterized in that it becomes high temperature in a short time after the start of energization, so if the air around the heating means 7 is not cooled, the upper space 275 This is because the rear part and the top plate 5 become hot. However, since the right heating coil 6R stops generating heat because the right heating coil 6R is different from the situation in which the right heating coil 6R is used with a strong heating power (for example, 3 kW), the operation of the cooling fan 262 on the left side is switched to the weak operation and continued. Is done.
Also, the cooling fan 261 operated in synchronism with the cooling fan 262 is automatically switched to the weak operation because the right heating coil 6R is de-energized and the electrical component 371R constituting the power source portion does not self-heat. Can be switched to.

A display to that effect is displayed in the display area of the heating means stopped in the abnormal state. For example, when the right heating coil 6R is stopped at an abnormally high temperature, it is shown in the screen 8 from the screen 5 through the screen 6 and the screen 7. In this way, the display area C2 whose area has been enlarged is indicated by characters indicating that it has stopped at an abnormally high temperature (ST-46).
In addition, after continuing the display for a predetermined time in this state, the area of the display area C2 returns to the same level as the display area A2 of the other heating coil 6L as shown in the screen 9, and the cooking progress state of the other heating means And setting conditions can be confirmed in the same way as normal. Even in this case, as shown in the screen 9, the right heating coil 6R displays that it is stopped at an abnormally high temperature, and neither of the display keys 84, 100 to 104 displays “right IH” (screen 9). As shown).

  Further, if it is desired to change the heating time of the left heating coil 6L in the state of the screen 9, if the function key 95 corresponding to the display key 100 displaying “Left IH” is pressed, as shown in the screen 10 The screen changes. If you want to change the set time in the state of the screen 10, if you press the function key 97 corresponding to the display key (→) 102 to increase the time, a number added from 20 minutes in 1 minute units will appear in the changed time frame. .

At the same time, in the guide area E, information useful for key operation is displayed. For example, when setting to 25 minutes, when the screen of “25” is displayed, if the corresponding function key 98 of the display key 103 corresponding to the enter key is pressed, the change is confirmed to 25 minutes, and the remaining time is also changed. It will change automatically at a later time.
For example, if the time change is made promptly, the display of the remaining time of 10 minutes is changed to 15 minutes and “the remaining time has also been changed” is displayed (the state of the screen 12). As shown in the screen 11, the area of the display area A2 of the left heating coil 6L is automatically enlarged greatly so that the user can easily check and input the cooking time.

When a dangerous state occurs when none of the heating means is in operation, as shown in the screen 2, for example, when the liquid crystal screen portion of the central display / input unit 80 becomes abnormally hot, Make sure that the pan is not placed on the top plate. Check that the pan being heated by the central heater is in the specified position ”(ST-43).
Then, the energization control circuit 200 switches the power source to the standby power source 400 and shuts off the commercial power source 202 (ST-53).
Furthermore, the abnormal display continues to elapse for a certain period of time, and then the driving of the central display / input unit 80 is automatically stopped and the display on the liquid crystal screen is turned off (ST-47).

As described above, the first embodiment includes display means that are used in common for at least two or more heating means (left heating coil 6L, right heating coil 6R, central heating means 7). Input means for inputting cooking conditions such as the heating amount and heating time of the heating means, display means for displaying the cooking conditions of the plurality of heating means input from the input means on the screen, other than the heating means and the heating means An abnormal operating situation of the electrical parts, and includes a heating means and a control means for controlling the electrical parts and the display means,
On the display screen of the display means, a display area corresponding to each heating means is prepared,
The control means displays the heating condition of the heating means in the display area in a state where the heating means and the electrical component are normally operated, and when the abnormality occurs in the heating means, the heating means related to the abnormality In the display area corresponding to
When an abnormality has occurred in the electrical component, the abnormality occurrence is displayed in a guide area different from the display area on the display screen of the display means.

Therefore, in a cooking device 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 abnormal state of each heating means and electrical parts is also displayed on the screen, the user can quickly and easily recognize the occurrence of the abnormality even during cooking, and safety is improved.
In addition, even if the cooking device automatically stops heating means and other electrical parts in response to abnormal conditions such as abnormal heating, the user is informed that it is in a stopped state and does not cause unnecessary confusion. Can be.

  Moreover, when a display means such as a liquid crystal display surface is provided on the upper surface portion (including the lower part of the top plate) of the cooker, the user can easily see it even during cooking, but the upper surface of the cooker is formed by a plurality of heating means. 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, since one screen is effectively used in scenes such as setting and confirmation of cooking conditions and displaying an abnormal state, the display means can be used even when there is a restriction on the heating space as described above. It is possible to fully exhibit the functions of.

  Further, when the cooking conditions for only a specific heating means 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. A guide area 81E is provided, and information at the time of abnormality, information on coping with the abnormality, and the like are displayed in this guide area at the time of abnormality. Therefore, it is possible to assist the cooking condition input operation and cooking, improve convenience, and also be able to alert the user about how to deal with an abnormality and how to use without abnormal operation, etc. An environment that can be used more safely can be provided.

Embodiment 2. FIG.
FIG. 36 is a plan view showing the structure of the upper surface operation unit, the central display / input unit, and the upper surface operation unit of the main body in the cooking device according to the second embodiment of the present invention.
36, in the second embodiment, the input key group 91 provided in the central operation unit 23 in the first embodiment is omitted, and the input of various cooking conditions and the like are input keys provided in the central display / input unit 80. Like to do.

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. 36, the screen area 81 for displaying information is allocated to a total of 10 areas. In particular,
Corresponding areas A1, A2 of the left heating coil 6L,
Corresponding areas B1, B2 of the central heating source 7,
Corresponding areas C1, C2 of the right heating coil 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, symbols (including arrows as shown in FIG. 36) 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. 24) indicating the key input function for each operation scene of the input keys 484, 500, 501, 502, 503, and 504. (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”, “arrow”, etc. 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).
Further, 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 as the input function characters, like the display key 102 corresponding to the input key 502 in FIG. Is not displayed on the liquid crystal screen to indicate that it is in an inactive state, so that 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.

  The current detection sensor 227 detects a current flowing through the resonance circuit 225 including a parallel circuit of the heating coil 220 and the resonance capacitor 224, and the detection output is supplied to the input unit of the energization control circuit 200. If an undercurrent or an overcurrent is detected in comparison with the normal current value due to some accident or poor continuity, the energization control circuit 200 determines that there is an abnormality (ST-8). The energization control circuit 200 has a function of determining whether or not the size of the pan (cooking utensil) to be used is appropriate, in addition to the above type of abnormality determination function.

Specifically, in ST-24 of the abnormal current monitoring process shown in FIG. 20, a predetermined power (for example, 1 kW) is supplied to the resonance circuit 225 instead of the thermal power (power) set by the user for the first few seconds. The current detection sensor 227 detects the input current value at that time.
That is, when the energization control circuit 200 drives the IGBT 225 as the switching means by outputting a drive signal with the same conduction ratio with a predetermined power, a pot having a diameter smaller than the area of the heating coil 220 is placed on the top plate 5. The current flowing through the current detection sensor 227 when the pan having a diameter larger than the area of the heating coil 220 is placed on the top plate 5. It is already known to be smaller than Therefore, the value of the current flowing through the portion of the current detection sensor 227 when an excessively small pan is placed in advance from the experimental results or the like is prepared as determination reference data.
Then, when a current that is too small is detected by the current detection sensor 227, it can be estimated on the energization control circuit 200 side that it is in an abnormal usage form, and therefore the process proceeds to the processing route of the abnormal processing 2 in ST-24.

  In addition, when the energization control circuit 200 changes the energization rate for the switching means 225 by itself and, for example, the heating power set by the user can maintain and ensure a normal heating state by reducing the conduction ratio to an allowable range, it is automatically The power adaptive control process is executed, and when a small current value is detected, it does not go to the abnormality process 2 unconditionally.

  FIG. 36 shows a state in which the determination of the pan as described above is being performed, and the characters “Now determining pot suitability” are initially displayed in the display area of the right heating coil 6R. After a few seconds, according to the determination result of ST-24 in the abnormal current detection monitoring process described above, in the case of a pan that is too small, the display area E shows that “the pan to be used is too small” “larger pan ( Use a warning letter such as “Please use a diameter of 10 cm or more”. In the present invention, the minimum diameter dimension of a suitable pan is not limited to the above “10 cm or more”, but is appropriately set to a numerical value depending on the diameter dimension of the heating coil.

When this pan suitability determination result is issued, the display area C2 of the display area 5R of the right heating coil 6R is changed from the state of FIG. 24 to the screen 3 of FIG. 23 as shown in the process ST-36 shown in FIG. As shown in Fig. 4, the display area is enlarged, and it is displayed that the pan is not suitable. In this case, the correction processing in step 39 is to recommend that an appropriate pan is used in the display area C2 and the guide area E as described above.
Thereafter, ST-40 to ST-44 are not performed, the energization control circuit 200 is not stopped, and cooking of the right heating coil 6R is automatically stopped once after a certain time from the point when it is displayed that the pan is too small in the display area E. To do.
When the area of the display area C2 is large, information on a pan suitable for use only in the area C2 can be displayed, or a change to a large pan can be urged, so nothing is displayed in the guide area E. Also good. If the user changes the pan to a larger one and performs the operation to start cooking again, cooking can be resumed. In this case, the abnormality monitoring control during cooking shown in FIG. 20 is performed.

In the second embodiment, when the user looks at the central display / input unit 80, the user can easily recognize and understand a desired input key as soon as possible, and the user can view the input key on the display screen of the central display / input unit 80. Because the cooking conditions and the like can be input by operating the input keys prepared in the above, a convenient cooking device is provided.
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 cooker can be obtained.
Although not shown, when any abnormality occurs in the heating unit, the screen of the display area corresponding to the heating unit in which the abnormality has occurred has a color and brightness different from those of the other heating units. The abnormal state may be displayed as characters / graphics in the display area.
Specifically, for example, the display area A2 corresponding to the left heating coil 6L, the display area B2 corresponding to the central heating source 7, and the display area C2 corresponding to the right heating coil 6R are unified (for example, If an abnormality occurs in any of the heating means, the color of any of the display areas A2, B2, C2 corresponding to the heating means in which the abnormality has occurred is changed (for example, changed to yellow). Call attention. In addition, when a critical situation or danger occurs that requires the cooker to stop, the color should be changed to a more vivid color (for example, the yellow display area will be displayed in orange). Can be considered.
That is, for example, the user can easily understand that the user is different from the normal by changing the screen color of the display area such as blue → yellow → orange. In addition, the color of the guide area E can be clearly changed between the color during normal operation and the color after the occurrence of abnormality is detected, so that the alerting effect and visual effect for the user can be enhanced.
In the present invention, the means for enhancing the alerting effect for the user is not limited to the one shown in the figure, and depending on the degree of abnormality, the area of the display area can be changed by changing the rate of illuminance ( Including blinking).

  The present invention sets cooking heating conditions on a common screen, and can easily and reliably check the heating conditions and abnormal conditions, so that it can be widely used as various cooking cookers for business and home use. it can.

  1: heating cooker body, 5: top plate, 6R: right heating means, 6L: left heating means, 7: central heating means, 10: front operation section, 19: heating chamber, 20: top operation section, 21: operation Part, 22: operation part, 23: central operation part, 40R: thermal power display lamp, 40L: thermal power display lamp, 70: door, 80: central display / input part, 91: input key group, 83: input key, 95- 99: input key, 84: display key, 100 to 104: display key, 200: energization control circuit (control means), 201: main power switch, 206R: right heating means circuit, 206L: left heating means circuit, 207: center Circuit for heating means, 208: Circuit for heating means for grill / oven, 260: Fan drive circuit, 261: Fan for cooling, 262: Fan for cooling, 263: Fan for cooling, 274: Lower space, 275 Upper space, 280: liquid crystal substrate, S1 to S9: temperature sensor, 311 temperature detection circuit, 315: cooling fan, 316: cooling fan, A1: first display area, A2: second display area, B1: 1st display area, B2: 2nd display area, C1: 1st display area, C2: 2nd display area, E: Guide area.

Claims (3)

A plurality of electromagnetic induction heating means;
Input means for inputting cooking conditions such as the heating amount and heating time of the heating means;
Display means for displaying cooking conditions of the plurality of heating means input from the input means;
Control means for detecting abnormal operating conditions of the electric parts except the heating means and the heating means, and controlling the heating means in which an abnormality is detected and the electric parts excluding the heating means and the display means;
With
On the display screen of the display means,
A display area corresponding to each of the plurality of heating means;
And a guide area that is used in common for the plurality of heating means, and at least one of an alarm and guidance is displayed as a message,
The control means includes
While displaying the heating conditions of the heating means in the display area in the state of operating normally,
In the state where an abnormality has occurred, the abnormality occurrence is displayed in the display area corresponding to the heating means related to the abnormality,
The control means includes
Further, determine the size of the pan used in the heating means,
In the display area corresponding to the heating means, the heating condition of the heating means is displayed in letters, and the fact that the pot size is being determined is displayed in letters ,
After determining the size of the pan, the determination result of the pan is displayed in characters in the guide area. When the pan is determined to be inappropriate for electromagnetic induction heating, information on the countermeasure is displayed in characters in the guide area. A cooking device characterized by The control means includes
If the pan is unsuitable for electromagnetic induction heating,
The cooking device according to claim 1, wherein the display area corresponding to the heating means is enlarged to indicate that the pot size is being determined, and non-conformity of the pot is also displayed in the display area. The control means includes
3. The cooking device according to claim 1, wherein when the pan is inappropriate for electromagnetic induction heating, incompatibility of the pan is displayed with letters in the guide area, and the heating unit is stopped. 3.

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