Induction heating conditioner
A single touch panel display integrated between heating areas of an induction cooker simplifies the display of multiple heating statuses and reduces heat transfer discomfort, improving usability.
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- HITACHI GLOBAL LIFE SOLUTIONS INC
- Filing Date
- 2022-09-08
- Publication Date
- 2026-07-23
Smart Images
Figure 0007894281000001 
Figure 0007894281000002 
Figure 0007894281000003
Abstract
Description
Technical Field
[0001] The present invention relates to an induction heating cooker.
Background Art
[0002] As the background art in this technical field, there is Japanese Patent Application Laid-Open No. 2012-229917 (Patent Document 4). This publication describes that "it includes a plurality of heating means for cooking, an input key for inputting cooking conditions such as the heating amount and heating time of the heating means, a central display / input unit for displaying the cooking conditions input from these input keys, and a control means for controlling the heating means and the central display / input unit. Before the start of cooking, the control means enables the input key for inputting the information necessary for starting cooking, displays the display key corresponding to the enabled input key, and after the cooking is started, the control means disables the input key for inputting the information that has become unnecessary due to the start of cooking and gray-out displays the display key corresponding to the disabled input key." (See the abstract). [[ID=1۳]] :
Prior Art Documents
Patent Documents
[0003] : : :
Patent Document 1
Summary of the Invention
Problems to be Solved by the Invention
[0004] : : The operation unit of an induction heating cooker is disclosed in the above Patent Document 1. However, there is room for improvement in terms of improving the usability of the induction heating cooker in this document. : : Therefore, an object of the present invention is to provide an induction heating cooker that can improve the usability of the user. : :
Means for Solving the Problems
[0005] : :To solve the above problems, one embodiment of the present invention comprises a top plate provided on the upper part of the main body, heating regions set at multiple locations on the top plate, each of which is a part that heats an object to be heated placed at that location, induction heating coils provided below the top plate corresponding to the position of each heating region, an operating device that receives various operations of the main body, and a display device that displays various messages of the main body, wherein the display device displays the heating status of the object to be heated in all heating regions on a single screen. Furthermore, the display device is capable of displaying any of the pages of a multi-page screen that lists predetermined items related to the heating status for any of the heating regions, and when the user presses and holds down the button for selecting the predetermined items on the operating device while any of the pages is being displayed by the user's operation, the display device sequentially moves the selection of the listed predetermined items every 1 hour, and when the screen display transitions to the next page of the multi-page screen due to the user continuing the long-press operation after the last predetermined item has been selected on that page, the time required from the selection of the first predetermined item to the selection of the next predetermined item on the page after the transition is a second hour, which is longer than the first hour. . [Effects of the Invention]
[0006] According to the present invention, it is possible to provide an induction heating cooker that is easy for users to use. Other issues, configurations, and effects not mentioned above will be clarified by the following description of the embodiments. [Brief explanation of the drawing]
[0007] [Figure 1] This is a cross-sectional view illustrating the general configuration of an induction heating device according to Embodiment 1 of the present invention. [Figure 2] This is a plan view of an induction cooker according to Embodiment 1 of the present invention. [Figure 3] This is an enlarged plan view of the operating device according to Embodiment 1 of the present invention. [Figure 4] This is an enlarged plan view of a part of the top plate of an induction cooker according to Embodiment 1 of the present invention. [Figure 5] This is a cross-sectional view of AA in Figure 2. [Figure 6] This is a block diagram illustrating the outline of the control system for an induction cooker according to Embodiment 1 of the present invention. [Figure 7] This is a front plan view of an induction cooker according to Embodiment 1 of the present invention. [Figure 8] This flowchart illustrates the basic control of the display control device when operating the operating device of an induction heating cooker according to Embodiment 1 of the present invention. [Figure 9]This is a plan view of the initial screen of the display device in an induction heating cooker according to Embodiment 1 of the present invention. [Figure 10] This is a plan view showing an example of a menu screen in an induction heating cooker according to Embodiment 1 of the present invention. [Figure 11] This is a plan view showing an example of the detailed settings screen for an induction heating cooker according to Embodiment 1 of the present invention. [Figure 12] This is a plan view showing an example of a heating status display screen in an induction cooker according to Embodiment 1 of the present invention. [Figure 13] This is a plan view of the initial screen displayed on the display device of an induction heating cooker according to Embodiment 2 of the present invention. [Figure 14] This is a plan view showing an example of a heat adjustment screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 15] This is a plan view showing an example of a heat adjustment screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 16] This is a plan view showing an example of a menu screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 17] This is a plan view showing an example of a temperature setting screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 18] This is a plan view showing an example of a menu screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 19] This is a plan view showing an example of a temperature setting screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 20] This is a plan view showing an example of the initial screen in an induction heating cooker according to Embodiment 2 of the present invention. [Figure 21] This is a plan view showing an example of a temperature setting screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 22] This is a plan view showing an example of a temperature setting screen in an induction cooker according to Embodiment 2 of the present invention. [Figure 23] This is a plan view of the initial screen displayed on the display device in an induction heating cooker according to Embodiment 3 of the present invention. [Figure 24] It is a plan view showing an example of a display screen of the heating status in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 25] It is a plan view showing an example of a display screen of the heating status in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 26] It is a plan view showing an example of a display screen of the heating status in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 27] It is a plan view showing an example of a display screen of the heating status in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 28] It is a plan view showing an example of a display screen of an error code in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 29] It is a plan view showing an example of a display screen of a pan confirmation in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 30] It is a plan view showing an example of a display screen of a menu in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 31] It is a plan view showing an example of a display screen of a menu in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 32] It is a plan view showing an example of a display screen of a menu in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 33] It is a plan view showing an example of a display screen of a menu in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 34] It is a plan view showing an example of a screen transition when interrupting the heating power adjustment screen in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 35] It is a plan view showing an example of a screen transition when interrupting the heating power adjustment screen in the induction heating cooker according to Embodiment 3 of the present invention. [Figure 36] It is a plan view showing an example of a screen transition when interrupting the heating power adjustment screen in the induction heating cooker according to Embodiment 3 of the present invention.
Mode for Carrying Out the Invention
[0008] Hereinafter, embodiments of the present invention will be described with reference to the drawings. [Examples]
[0009] Figure 1 is a cross-sectional view illustrating the schematic configuration of the induction cooker of this embodiment 1. In the drawings described below, arrows indicate the front, back, left, right, up, and down directions as appropriate. The induction cooker 1 is a so-called IH (Induction Heating) cooking heater. As shown in Figure 1, the induction cooker 1 comprises a plate-shaped top plate 2 made of, for example, crystallized glass, and a heating region 3 set on the top plate 2 (set on the top plate 2), which is the part that heats the object to be heated N placed at this set position. As will be explained below, in this embodiment 1 there are multiple heating regions 3, with three set in this example. Hereafter, when distinguishing between them, they will be referred to as heating region 3R, heating region 3L, and heating region 3M, respectively. When referring to these three heating regions collectively, they will simply be referred to as heating region 3. Below each heating region 3, an induction heating coil 4 is provided corresponding to the position of each heating region 3.
[0010] When a high-frequency alternating current is passed through the induction heating coil 4, strong magnetic field lines m are generated from the induction heating coil 4. These magnetic field lines m pass through the top plate 2 and strike the object to be heated, such as an iron pot, placed on the heating area 3. These magnetic field lines m generate eddy currents I on the metal surface at the bottom of the object to be heated N. The metal at the bottom of the object to be heated N resists these eddy currents I, causing the metal surface at the bottom of the object to be heated N to heat up, and the object to be heated N is heated.
[0011] Figure 2 is a plan view of the induction cooker 1. A top plate 2 is provided on the upper part of the housing 12 of the main body 11 of the induction cooker 1. Three heating regions (heaters) 3, namely heating region 3R, heating region 3L, and heating region 3M, are set on the upper surface of the top plate 2. Heating regions 3R and 3L are arranged side by side on the upper surface of the top plate 2, with a certain amount of space between them. Heating region 3M is located behind the midpoint between heating regions 3R and 3L, with a certain amount of space between them. Heating regions 3R, 3L, and 3M are, for example, circular, but heating regions 3R and 3L are, for example, relatively large circles of the same size, while heating region 3M is a smaller circle. The locations of heating areas 3R, 3L, and 3M on the top surface of top plate 2 are indicated by color coding, lines, etc., on the top surface of top plate 2 (so that they can be seen from above).
[0012] A grill 14 is provided inside the left front side of the main body 11, and the left front side of the housing 12 serves as the opening / closing section 14a of the grill 14. The grill 14 cooks food such as fish by heating with an electric heating element 48 (Figure 6). Viewing the top plate 2 from above, an operating device 13 is located near the front edge of the top plate 2, accessible from the top surface. The operating device 13 is a group of buttons that accept various operations on the main body 11. The operating device 13 is, for example, a group of electrostatic induction type glass touch buttons. Of course, the operating device 13 may also be configured as a mechanical contact type switch. The operating device 13 consists of, for example, multiple buttons arranged in a row in the left-right direction. Of the operating device 13, the right heater operating section 13R, arranged in a row on the right side in the left-right direction, accepts various operations on the heating area 3R (corresponding to the induction heating coil 4) from the user. Of the operating device 13, the left heater operating section 13L, arranged in a row on the left side in the left-right direction, accepts various operations on the heating area 3L (corresponding to the induction heating coil 4) from the user. Of the operating device 13, the central heater and grill operating section 13M, which is arranged in a line in the center in the left-right direction, receives various operations of the heating area 3M (corresponding to the induction heating coil 4) and various operations of the grill 14 from the user.
[0013] Figure 3 is an enlarged plan view of the operating device 13. For example, the main power switch 21 located at the far right end of the operating device 13 is a switch that turns the main power of the main unit 11 ON and OFF. The right heater operating section 13R has, from left to right, a first power button 22, a low heat button 23, a medium heat button 24, a high heat button 25, a heat reduction button 26, a heat increase button 27, and a menu button 28. The first power button 22 turns the power of the induction heating coil 4 of the corresponding heating area 3 (in this case, heating area 3R) ON and OFF, that is, it is a button that receives an instruction (ON) to make the object to be heated N ready to be heated by the induction heating coil 4 corresponding to the heating area 3. The low heat button 23 is a button that sets the induction heating coil 4 of the corresponding heating area 3 to low heat. The medium heat button 24 is a button that sets the induction heating coil 4 of the corresponding heating area 3 to medium heat. The high heat button 25 is a button that sets the induction heating coil 4 of the corresponding heating area 3 to high heat. Thus, the heating area 3 (heating area 3R in this case) can be adjusted to three main levels of heat: low, medium, and high. Each of these levels can be adjusted to, for example, three levels, for a total of nine levels of heat adjustment. The heat reduction button 26 adjusts the heat level in the downward direction, and the heat increase button 27 adjusts it in the upward direction. The menu button 28 displays the menu screen for the corresponding heating area 3. The low heat button 23, medium heat button 24, high heat button 25, heat reduction button 26, and heat increase button 27 are buttons that constitute the first heat control unit.
[0014] Since the button layout and functions of each button on the left heater control unit 13L are the same as those on the right heater control unit 13R, the left heater control unit 13L is assigned the same reference numerals as the right heater control unit 13R, and its explanation is omitted. The central heater and grill control unit 13M includes a central heater control unit 13MM that receives input from the heating area 3M and a first grill control unit 13MR that receives input from the grill 14. The functions of the buttons on the central heater control unit 13MM and the grill control unit 13MR are basically the same as the buttons on the right heater control unit 13R and the left heater control unit 13L, which are assigned the same reference numerals. However, the central heater control unit 13MM does not have a low heat button 23, a medium heat button 24, or a high heat button 25. In addition, the first grill control unit 13MR allows for heat adjustment in only three stages, for example, low heat, medium heat, and high heat, using a heat reduction button 26 and a heat increase button 27.
[0015] The back button 29 is a button that transitions the image displayed on the display device 31 to the previous image, as will be described later. An LED display unit 30 is provided near the rear of each button on the operating device 13, and when the corresponding button is operated, the corresponding LED display unit 30 lights up to indicate that the corresponding button has been operated.
[0016] Incidentally, the control panel of existing induction cookers is equipped with a display unit consisting of, for example, a character LCD panel that displays messages corresponding to the operations received from the user. However, existing induction cookers only have a single control panel, which makes them inconvenient for users. Therefore, there is a need to improve user experience by adding a touch panel control panel to induction cookers in addition to the existing control panel. Furthermore, the dimensions of the installation space for induction cooktops in typical household kitchens are generally fixed to some extent. Therefore, induction cooktops are designed to fit within those dimensions. Induction cooktops typically have multiple heating areas. Consequently, the top plate must be allocated for these multiple heating areas.
[0017] However, in this case, if the touch panel control unit, as described above, is mounted on the top plate for operation, then when a large pot or the like is placed on the heating area and heated, the touch panel control unit must be positioned relatively close to the pot or the like. As a result, the distance from the pot or the like to the touch panel control unit tends to be short, making it easier for heat to transfer from the pot or the like to the touch panel control unit (the corresponding part of the top plate). This can lead to a problem where users who touch the heated top plate to operate the control unit become concerned about the temperature rise of the control unit (the part of the top plate above it). Furthermore, the heat resistance of the touch panel should be considered.
[0018] Therefore, even if a touch panel control unit is added, there is a challenge in ensuring that the user does not feel any discomfort when operating that unit. Furthermore, the aforementioned existing control unit includes a display unit consisting of a character liquid crystal panel, each provided for a separate heating area. However, in this case, in order to understand the heating status of multiple heating areas, one must check the display unit corresponding to each heating area individually, which presents a problem as it makes it difficult to easily understand the heating status of multiple heating areas.
[0019] Therefore, when adding the aforementioned touch panel control unit, there is a challenge in making it easy to understand the heating status of multiple heating areas. The following describes the configuration and effects of induction heating cooker 1, which solves these problems.
[0020] Figure 4 is an enlarged plan view of a portion of the top plate 2 of the induction cooker 1. A display device 31 is provided in the center of the top plate 2 in the left-right direction, in front of the heating areas 3R and 3L and behind the operating device 13, and is operable from the top surface of the top plate 2. The display device 31 is a touch panel type and accepts various operations from the user and displays various messages. For displaying messages, the display device 31 may use a liquid crystal panel or an organic EL panel. Note that liquid crystal panels are more durable than organic EL panels in terms of heat resistance. In this embodiment 1, the display device 31 will be described as using a touch panel type with a liquid crystal panel.
[0021] Figure 5 is a cross-sectional view of section AA in Figure 2. Inside the housing 12 of the main body 11 of the induction cooker 1, a support frame 42 is provided, fixed to the housing 12, etc. The liquid crystal touch panel display device 31 is supported on the upper part of the support frame 42, and the upper surface of the display device 31 is in close contact with the lower surface of the top plate 2, with the top plate 2 acting as the contact glass for the display device 31. Therefore, the display device 31 can be operated by touching the upper surface of the top plate 2. An operating device 13 is supported on the upper front part of the housing 12. The upper surface of the operating device 13 is in close contact with the lower surface of the top plate 2, with the top plate 2 acting as the contact glass for the operating device 13. Therefore, the operating device 13 can be operated by touching the upper surface of the top plate 2. A display control board 43 is provided at the bottom of the support frame 42. A display control device 45 (see Figure 6), mainly composed of a microcomputer, is mounted on the display control board 43. The display control device 45 controls the display device 31 and displays screen information on the display device 31 according to the operation received by the operating device 13. A support frame 44, supported by the housing 12 or the like, is provided at the lower part of the support frame 42. A main control board 46 is mounted on the support frame 44. A main control device 47 (see Figure 6), which is mainly composed of a microcomputer or ASIC (Application Specific Integrated Circuit), is mounted on the main control board 46. The main control device 47 centrally controls the entire induction heating cooker 1.
[0022] Figure 6 is a block diagram illustrating the control system of the induction cooker 1. The display control device 45 is connected to the display device 31 and the operating device 13 via a predetermined interface. The main control device 47 is connected to the three induction heating coils 4 (corresponding to heating areas 3R, 3L, and 3M, respectively) and the heating element 48 of the grill 6 via a predetermined interface. The main control device 47 controls the heating power of heating areas 3R, 3L, 3M, and the grill 6 by controlling the three induction heating coils 4 and the heating element 48. Operation information received from the user via the operating device 13 and the display device 31 is transmitted to the main control device 47 via the display control device 45.
[0023] Figure 7 is a front plan view of the induction cooker 1. The dashed circular lines 49 surrounding the outside of heating area 3R and heating area 3L indicate the outer edges of the areas where heating objects N, such as iron pots, can be placed. The diameter of these dashed circular lines 49 is, for example, 26 cm for both heating area 3R and heating area 3L. As is clear from Figure 7, the heating areas 3R, 3L, and 3M have large areas on the top surface of the top plate 2, so the distance from the area enclosed by the dashed lines 49 to the display device 31 is very short.
[0024] Returning to Figure 4, the display device 31 is located in the area between each heating region 3 and the operating device 13. The display device 31, which is a liquid crystal touch panel type, has a receiving region 31a that accepts various operations and a non-receiving region 31b that does not accept various operations. In other words, the display device 31 has a region that has the function of a touch panel and a region that does not have that function. The non-receiving region 31b, which does not have the function of a touch panel, only displays various messages. The non-receiving region 31b is located closer to the heating regions 3R, 3L, and 3M than the receiving region 31a. That is, as shown in Figure 4, the shortest distance b from the non-receiving region 31b to the heating region 3L is shorter than the shortest distance c from the receiving region 31a to the heating region 3L (the same applies to heating regions 3R and 3M). The shortest distance b between the outermost part of the heating region 3 closest to the display device 31 (heating region 3R and heating region 3L in this example) and the display device 31 is, for example, 40 mm or more and 80 mm or less. In other words, taking into consideration the effects of heat (such as the durability of the touch panel and the temperature sensation when a user touches the touch panel), the reception area 31a, which has the functionality of a touch panel, is positioned further away from the heating area 3 than the non-reception area 31b, which does not have that functionality.
[0025] The non-receiving area 31b is divided from right to left into display units 31b1, 31b2, and 31b3, which display information such as the heating status of the heating area 3R, heating area 3M (and grill 14), and heating area 3L, respectively. At least a portion of the receiving area 31a may be sandwiched between the non-receiving area 31b, which is closer to the heating area 3 than the receiving area 31a. For example, the portions of display units 31b1 and 31b3 may be maintained as the non-receiving area 31b, and only the portion of display unit 31b2 may be designated as the receiving area 31a.
[0026] Figure 8 is a flowchart illustrating the basic control of the display control device 45 when operating the operating device 13. When the operating device 13 receives an operation from the user (Yes in step S1), the display control device 45 displays a message corresponding to the operation received by the operating device 13 (step S2). This is the basic control of the display control device 45 when operating the operating device 13.
[0027] Let me explain in more detail. Figure 9 is a plan view of the initial screen 51 of the display device 31. The initial screen 51 is displayed on the liquid crystal touch panel display device 31 when the main power switch 21 (Figure 3) is turned ON. In terms of screen configuration, the reception area 31a is divided into button section 31a1, button section 31a2 (second grill operation section), and button section 31a3, corresponding vertically to the display section 31b1, display section 31b2, and display section 31b3, respectively. Button sections 31a1, 31a2, and 31a3 also correspond from right to left to heating area 3R, heating area 3M (and grill 14), and heating area 3L, respectively.
[0028] The button section 31a1 displays a second power button 61 for turning the heating area 3R (and its induction heating coil 4) ON and OFF, a low heat button 62 (second heat control unit) for setting the heating area 3R to low heat, a medium heat button 63 (second heat control unit) for setting it to medium heat, a high heat button 64 (second heat control unit) for setting it to high heat, and a menu button 65 for transitioning the display device 31 to the menu screen (icon display). The second power button 61 is a button that receives an instruction (ON) to make the object to be heated N ready to be heated by the induction heating coil 4 corresponding to the heating area 3R.
[0029] The markings on button section 31a3 are the same as those on button section 31a1, so the same reference numerals are used and the explanation is omitted. The central button section 31a2 displays the second power button 66. The second power button 66 is used to select the heating area 3R (the induction heating coil 4) or the grill 14 (the heating element 48), and to turn the selected heating area 3R or grill 14 ON or OFF. In other words, the second power button 66 can also be described as a button that receives an instruction (ON) to make the object to be heated N or food such as fish ready to be heated by the induction heating coil 4 or the heating element 48 of the grill 14 corresponding to the heating area 3M.
[0030] In this example, the display units 31b1, 31b2, and 31b3 show Right IH, Middle IH / Grill, and Left IH, respectively, indicating that these correspond to heating area 3R, heating area 3M (and grill 14), and heating area 3L.
[0031] When any of the buttons shown in Figure 9 are selected (by touching a button on the touch panel), the selected button changes color or otherwise indicates that it has been selected. Also, when any of the buttons on the operating device 13 (Figure 3) are operated, the corresponding button on the display device 31 changes color or otherwise according to the basic control shown in Figure 8, indicating that the button on the operating device 13 corresponding to the button whose color changed has been operated. In this way, the display device 31 displays a message corresponding to the operation received by the first power button 22. The display device 31 also displays a message corresponding to the operation received by the first grill operation unit 13MR (Figure 3). Furthermore, the display device 31 displays a message corresponding to the operation received by the first heat control unit (low heat button 23, medium heat button 24, high heat button 25) (Figure 3).
[0032] When the menu button 65 is pressed, the liquid crystal touch panel display device 31 transitions to the menu screen for the heating area 3R, heating area 3M (and grill 14), or heating area 3L corresponding to the pressed menu button 65. Similarly, when the menu button 28 on the control device 13 (Figure 3) is pressed, the device transitions to the menu screen.
[0033] Figure 10 is a plan view showing an example of such a menu screen. This menu screen 71 is an example of operating the menu button 65 on the button section 31a3 corresponding to the heating area 3L (induction heating coil 4). Therefore, the display section 31b3 displays the message "Left IH in operation," indicating that the heating area 3L is being operated. In addition, the reception area 31a displays multiple selection buttons 72 showing various dishes and cooking methods. When the close button 73 is selected, the screen returns from the menu screen 71 to the original initial screen 51. Furthermore, regarding the heating area 3L, the message "Please select a Left IH menu" is displayed to prompt the user to select a dish or cooking method to be set using the selection button 72. When the user selects the desired selection button 72 as prompted by this message, the display device 31 transitions to the detailed settings screen. Incidentally, since one touch panel is shared for operating heating area 3L, heating area 3M (and grill 14), and heating area 3R, users may sometimes be confused about which heating area 3 they are operating (for example, when multiple pots are placed on the stove). However, by displaying "Left IH" as shown here, users can avoid confusion about which heating area 3 they are operating. In this example, since neither the control device 13 nor the display device 31 are being operated for heating area 3R and heating area 3M (and grill 14), no message indicating that heating area 3R or heating area 3M (and grill 14) is being operated is displayed on the display units 31b1 and 31b2. When these are also being operated in parallel, a message such as "Right IH in operation" will be displayed in parallel.
[0034] Figure 11 is a plan view showing an example of the detailed settings screen. Here, an example is shown where "Deep Frying" is selected using selection button 72 for heating area 3L. On the detailed settings screen 81, the message "Please select a temperature and start." is displayed for "Deep Frying" selected with selection button 72. Here, the temperature displayed to the left can be scrolled up and down using the temperature selection buttons 82 and 83 to select a temperature. In this example, a temperature of 170°C is selected. Also, "Pork Cutlet, Karaage" is displayed in the cooking menu display area 84 as a "recommended dish" when cooked at the selected temperature of 170°C. When the temperature is selected with temperature selection buttons 82 and 83 and the start button 85 is operated, the operation course for "Deep Frying" selected with selection button 72 and the set temperature of 170°C selected with temperature selection buttons 82 and 83 are set, and the heating area 3L (induction heating coil 4) is controlled according to these settings and operation begins. Note that operating the close button 86 returns you from the detailed settings screen 81 to the menu screen 71. Furthermore, pressing the cancel button 87 cancels the operation of the 3L heating area that was started by pressing the start button 85. By operating the start button 85, the display device 31 transitions to the heating status display screen.
[0035] Figure 12 is a plan view showing an example of the heating status display screen. Here, an example is shown where the selection button 72 "Deep Frying" and the heating temperature 170°C are set for heating area 3L. On the heating status display screen 91, the "heating status" for heating area 3L is displayed as follows: heating corresponding to the "Deep Frying" operation course is being performed, the heating temperature is 170°C, and it is currently "preheating". Thus, the "heating status" is various information that shows the specific status of heating the object N that is currently being heated. The "heating status" is displayed in the heating status display area 95. In this example, heating areas 3R and 3M (and the grill 14) are not in operation, so their "heating status" is not displayed, and instead an image similar to the initial screen 51 (Figure 9) is displayed. That is, if heating areas 3R and 3M (and the grill 14) are also in operation, their "heating status" will also be displayed on the display device 31. In other words, the heating status of all heating areas 3R, 3M (and grill 14), and 3L is consolidated and displayed on a single screen of the display device 31 (see also Figure 4).
[0036] When the low heat button 23, medium heat button 24, high heat button 25, heat reduction button 26, or heat increase button 27 (Figure 3) of the control device 13 is operated, the heating status display screen 91 is displayed on the display device 31 in accordance with the operation, and the heating status of the heating area 3 is displayed. The temperature change buttons 92 and 93 are used to adjust the set temperature. The off switch 94 is used to turn off the operation of the 3L heating region while it is running.
[0037] As described above, the induction cooker 1 includes, in addition to the operating device 13 that receives various operations on the main unit 11, a display device 31 that receives various operations on the main unit 11 and displays various messages via a touch panel (Figure 7, etc.). Therefore, it is possible to provide an induction cooker 1 that is easy for the user to use. In this case, a message corresponding to the operation received by the control device 13 is displayed on the display device 31. Therefore, unlike existing induction heating cookers, there is no need to separately provide a character LCD display unit or the like to display a message corresponding to the operation of the control device 13, thus preventing the top plate 2 and the like from becoming larger.
[0038] Furthermore, the display device 31 is provided in the area between each heating area 3 and the operating device 13, and includes a receiving area 31a that accepts various operations and a non-receiving area 31b that does not accept such operations, with the non-receiving area 31b being located closer to the heating area 3 than the receiving area 31a (Figure 4). As a result, the receiving area 31a, which is operated by the user's fingers, is less affected by the heat of the object to be heated N, thus preventing the user from feeling uncomfortable due to the high temperature when touching the receiving area 31a.
[0039] Furthermore, since the heating status of all heating regions 3 is aggregated and displayed on the display device 31 (see Figure 9), the heating status of multiple heating regions 3 can be easily grasped. [Examples]
[0040] In Example 2, the hardware configuration and other components are the same as in Example 1, so the same reference numerals are used for these components, and detailed explanations are omitted. The difference between Example 2 and Example 1 lies in the specific content of the screen display of the display device 31, so these details will be explained below.
[0041] Figure 13 is a plan view of the initial screen displayed on the display device in Embodiment 2. This initial screen 101 displays an image of the external appearance of the induction cooker 1 (perspective display). Specifically, the figure 102, which is a picture of the top plate 2 viewed from the front at an angle, has display buttons 103 to 105 (icons) arranged to evoke the heating areas 3R, 3M, and L on the top plate 2. Display buttons 103 and 105 are arranged side by side on the front side of figure 102 to evoke the heating areas 3R and L, respectively. Display button 104 is displayed behind the midpoint between display buttons 103 and 105 in figure 102 to evoke the heating area 3M. Display buttons 103 to 105 correspond to the heating areas 3R, 3M, and L, respectively, and are buttons that enable operation of heating areas 3R, 3M, and L, respectively, and also serve as a display unit that shows the "heating status" of those areas. In front of figure 102, figure 106 is displayed, which is reminiscent of the side front portion of the housing 12 (Figure 2) of the induction heating cooker 1. On the left side of figure 106, a display button 107 is displayed, which is reminiscent of the grill 14 located on the left side of the side front portion of the housing 12. The display button 107 corresponds to the grill 14 and is a button that enables operation of the grill 14, and also serves as a display unit that shows their "heating status". In this way, the display device 31 has multiple display buttons for the operation of multiple heating areas 3 and the grill 14, each of which are arranged on a single screen, corresponding to the arrangement of the multiple heating areas 3 and the grill 14 on the top plate 2 and the housing 12.
[0042] By operating any of the display buttons 103 to 105, the user transitions to the heat adjustment screen for the heating area 3 corresponding to the operated display button (icon). Figure 14 is a plan view showing an example of the heat adjustment screen. This heat adjustment screen 111 is an example related to heating area 3L. By moving the heat adjustment button 112 left or right, the heat can be adjusted to three levels: low, medium, and high, or even more precisely to nine levels. The level of the set heat is displayed on the level meter of the heat adjustment button 112. In this example, it is shown that heating area 3L is adjusted to medium heat level 6 (medium heat 6). Furthermore, the fact that the currently displayed screen is the heat adjustment screen for heating area 3L is visually indicated by changing the color of only the circular shape corresponding to heating area 3L among the three circular shapes showing the arrangement of the three heating areas 3. In addition, the text "Left IH" indicates that it is the screen corresponding to heating area 3L (part of figure 113).
[0043] When the low heat button 23, medium heat button 24, high heat button 25, heat reduction button 26, or heat increase button 27 are operated on the control device 13 (Figure 3), the selected heat level is indicated by the level meter of the heat adjustment button 112 and displayed on the display device 31. When the start button 114 is operated, operation in heating area 3L (induction heating coil 4) starts at the heat setting set by the heat adjustment button 112. When the menu button 115 is operated, the menu screen corresponding to the operated menu button 115 is accessed. In this case, since it is the heat adjustment screen 111 corresponding to heating area 3L, the menu screen for heating area 3L is accessed.
[0044] Figure 15 is a plan view showing an example of a heat output adjustment screen. This heat output adjustment screen 121 relates to the heating region 3R. Its content is the same as that of Figure 14, so the same reference numerals as in Figure 14 are used and the explanation is omitted. The heat output adjustment screen corresponding to the heating region 3M is also the same as that of Figures 14 and 15.
[0045] Figure 16 is a plan view showing an example of a menu screen. This menu screen 131 is an example of what is displayed when the menu button 115 for heating area 3R is operated. The menu screen 131 displays multiple heating menu selection buttons 132, each displaying a specific heating menu. By selecting one of these heating menu selection buttons 132, the operating course corresponding to the selected heating menu can be set for heating area 3R. Selection buttons 133 and 134 are buttons that display other heating menu selection buttons 132. In addition, an image 135 is displayed in the upper right corner of the screen, indicating that the menu screen 131 corresponds to heating area 3R, using the same method as the heat adjustment screen 111. In addition, a button 136 is displayed in the upper left corner of the screen that transitions to the heat adjustment screen corresponding to heating area 3L.
[0046] Furthermore, when the menu button 28 is operated on the control device 13 (Figure 3), a menu screen like the one illustrated in Figure 16 is displayed on the display device 31. Figure 17 is a plan view showing an example of the temperature setting screen that appears when the heating menu selection button 132 is selected. This temperature setting screen 141 is an example of when the "deep-frying" heating menu selection button 132 is selected. The set temperature can be adjusted by adjusting the temperature adjustment buttons 142 and 143. Here, the temperature is set to 140°C. Information necessary for the deep-frying menu, such as the amount of oil and the minimum required oil depth, is also displayed. By setting the desired temperature with the temperature adjustment buttons 142 and 143 and operating the start button 144, operation of the 3L heating area at the set temperature specified for the "deep-frying" menu begins. Images 135 and button 136 are the same as described above.
[0047] The temperature setting screen, as illustrated in Figure 17, is also displayed on the display device 31 when the first power button 22, low heat button 23, medium heat button 24, high heat button 25, heat reduction button 26, or heat increase button 27 of the right heater control unit 13R, etc., are operated on the control device 13 (Figure 3).
[0048] Figure 18 is a plan view showing an example of a menu screen that appears when the display button 107 is operated on the initial screen 101 (Figure 13). Since the display button 107 corresponds to the grill 14, the menu screen 151 corresponding to the grill 14 is displayed. The menu screen 151 displays multiple heating menu selection buttons 152. By selecting a heating menu selection button 152, the operating course corresponding to the selected heating menu can be set on the grill 14. The menu display buttons 153 and 154 are buttons that display other heating menu selection buttons 152. Image 135 and button 136 are the same as described above.
[0049] Furthermore, when the menu button 28 of the first grill control unit 13MR of the control device 13 (Figure 3) is operated, a menu screen as illustrated in Figure 18 is displayed on the display device 31. Figure 19 is a plan view showing an example of the temperature setting screen that appears when selecting the heating menu selection button 152. The temperature setting screen 161 is displayed when "Fillet Dried Fish" is selected with the heating menu selection button 152. Here, the heat level can be selected from three levels: low, medium, and high, by selecting from the temperature setting buttons 162 to 164. In this example, medium heat is selected, and the corresponding temperature setting button 163 is colored differently. By operating the temperature setting buttons 162 to 164 to select the heat level and then operating the start button 165, the grill 14 will begin heating using the selected heat level (medium heat) in the "Fillet Dried Fish" heating menu. Images 135 and button 136 are the same as described above. In addition, information on heat level adjustment guidelines, how to arrange the ingredients, and the accessories to be used is also displayed on the temperature setting screen 161. Furthermore, by operating the "Tips for Use" button 166, you can transition to a screen that displays detailed information on how to use the grill 14 effectively.
[0050] Furthermore, when the lower heat button 26 and the higher heat button 27 of the first grill control unit 13MG of the control device 13 (Figure 3) are operated, a temperature setting screen as illustrated in Figure 19 is displayed. Once the above operations are completed and any of the heating areas 3 or grill 14 is operational, the system returns to the initial screen 101. Figure 20 is a plan view showing an example of the initial screen in this case. On this initial screen 101, the "heating status" of the operational heating areas 3 and grill 14 is displayed on display buttons 103-105 and 107. In this example, heating areas 3R, 3L, and grill 14 are operational. Therefore, in this example, display button 103, which corresponds to heating area 3R, displays that the set temperature is 140°C, and a bubble indicates that "deep-frying" is currently selected, that the temperature is appropriate, and that there is 1 minute remaining. In addition, display button 105, which corresponds to heating area 3L, displays that the heat level is 6 and a bubble indicates that there is 2 minutes remaining. Furthermore, display button 107, which corresponds to grill 14, displays that the heat level is medium and a bubble indicates that "sliced dried fish" is selected. Furthermore, the set heat level of each heating area 3 and grill 14 that is currently in operation is visually indicated by the color of the display buttons 103-105 and 107. For example, a lighter orange color is displayed for lower heat settings, and a darker red color for higher settings.
[0051] In this way, the initial screen 101 displays the "heating status" of each heating area 3 and grill 14 that is currently in operation, all consolidated on a single screen of the display device 31. Figure 21 is a plan view showing an example of a temperature setting screen that can be accessed by operating the display button 103 corresponding to the heating area 3R currently in operation on the initial screen 101 of Figure 20. On this temperature setting screen 171, the current set temperature can be set to a different temperature by operating the temperature adjustment buttons 172 and 173. In addition, the operation of heating area 3R can be stopped by operating the off button 174. Furthermore, by operating the return button 175, the user can return to the initial screen 101 of Figure 20.
[0052] Figure 22 is a plan view showing an example of a temperature setting screen that can be accessed by operating the display button 107 corresponding to the operating heating area 3L on the initial screen 101 of Figure 20. On this temperature setting screen 181, the currently set heat level can be changed by operating the level meter of the heat adjustment button 182. In addition, the operation of heating area 3L can be stopped by operating the off button 183. Furthermore, by operating the return button 184, the user can return to the initial screen 101 of Figure 20.
[0053] According to the induction heating cooker 1 of this embodiment 2 described above, the initial screen 101 displays the heating status of each heating area 3 and grill 14 that is currently in operation, all consolidated on a single screen of the display device 31. Therefore, the heating status of multiple heating areas 3 and grill 14 can be easily grasped. Furthermore, on the initial screen 101, the buttons for operating each of the multiple heating areas 3 and the grill 14 are arranged on a single screen, corresponding to the arrangement of the multiple heating areas 3 and the grill 14 on the top plate 2 and the housing 12 of the main unit 11. As a result, the correspondence between the display buttons 103-105, 107 and each heating area 3 and grill 14 is easy to understand, improving operability.
[0054] Furthermore, since the menu screens 131 and 151 (Figures 16 and 18) can be reached with just two or one button presses, including the operation of display buttons 103-105 and 107, transitioning to the menu screen is easy and usability is improved. [Examples]
[0055] In Example 3, the hardware configuration and other aspects are the same as in Example 1, except for the points mentioned below, so detailed explanations will be omitted using the same reference numerals as in Example 1. First, in Example 3, the display device 31 is not a touch panel, but a display device consisting of a normal liquid crystal screen or the like that can only display images and does not accept user operation. The display device 31 displays images in response to the operation of the operating device 13. Furthermore, another difference between Example 3 and Examples 1 and 2 concerns the specific content of the screen display of the display device 31, so these details will be explained below.
[0056] Figure 23 is a plan view of the initial screen displayed on the display device in Example 3. This initial screen 201 is divided into four display areas 202 to 205. Each of the display areas 202 to 205 corresponds to the heating areas 3R, 3M, and 3L, and the grill 14, respectively. Display area 202 is positioned to the right of the initial screen 201, corresponding to the position of heating area 3R on the main unit 11, and displays the words "Right IH" and an image symbolizing its position on the main unit 11. Display areas 203 to 205 also correspond to heating areas 3M, 3L, and the grill 14, respectively, and are positioned in the same location as display area 202, displaying the same words and images as display area 202. Each of the display areas 202 to 205 corresponds one-to-one with heating areas 3R, 3M, 3L, and the grill 14, and is an area that displays messages such as the heating status of the corresponding heating area 3R, 3M, 3L, and grill 14.
[0057] Figures 24 to 27 are plan views showing examples of the heating status display screen. Figure 24 is an example of the heating status display screen 211 when heating area 3L is in operation, Figure 25 is an example of the heating status display screen 211 when heating area 3R is in operation, Figure 26 is an example of the heating status display screen 211 when grill 14 is in operation, and Figure 27 is an example of the heating status display screen 211 when all heating areas 3R, 3M, 3L and grill 14 are in operation. In each case, the heating status such as elapsed time, remaining time, and heat level is displayed in the display areas 202 to 205 corresponding to the one that is in operation among heating areas 3R, 3M, 3L and grill 14.
[0058] Figure 28 is a plan view showing an example of the error code display screen. In the error code display screen 212, the error codes for the corresponding heating areas 3R, 3M, 3L and grill 14 are displayed in display areas 202 to 205, respectively. When an error occurs in any of the heating areas 3R, 3M, 3L or grill 14, the presence of an error and the type of error are indicated by symbols or other displays.
[0059] Figure 29 is a plan view showing an example of the pot confirmation screen display. Even if heating area 3R, 3M, or 3L is in operation, if it is not possible to confirm that a pot is placed on that heating area 3R, 3M, or 3L, the message "Pot Confirmation" will be displayed in one of the display areas 202 to 204 corresponding to the relevant heating area 3R, 3M, or 3L on the pot confirmation screen 213 to attract the user's attention.
[0060] Figures 30 to 33 are plan views showing examples of menu screen displays. The menu screen 221 in Figure 30 is the first page of a multi-page screen that displays a list of predetermined items related to the heating status for either the heating areas 3R, 3M, 3L, or the grill 14. In other words, the menu screen 221 here is the first page of a multi-page screen equipped with a menu display area 222 that displays items such as "Breakfast Set" and "Warming Fried Food" as menus for heating status, for example, in two columns horizontally and three rows vertically. In this example, the menu screen 221 corresponding to the grill 14 is shown as an example. When the user long-presses the button for selecting a predetermined item on the operating device 13, in this example the menu button 28 corresponding to the grill 14 (the menu button 28 on the first grill operating unit 13MR in Figure 3), the selected item moves sequentially from the top row to the bottom row of the left column every hour (for example, 0.5 seconds). When it reaches the bottom row, it then moves sequentially from the top row to the bottom row of the right column, and the item "Next Page" is placed at the bottom row. When you release the long press on menu button 28, the system will stop at the currently selected item (indicated by the text being inverted). In the example in Figure 30, "grilled eggplant" is selected. After selecting an item in this way, set the heat level using the heat reduction button 26 and heat increase button 27 as shown in the message at the bottom of Figure 30, and then press the first power (start) button 22 (button 22 on the first grill operation unit 13MR in Figure 3) to operate the grill 14 with the selected item and heat level (the same applies to heating areas 3R, 3M, and 3L).
[0061] As shown in Figure 31, if the menu button 28 is pressed and held when the last item in the aforementioned list, "Next Page," is selected (the user continues to press and hold), the screen display transitions to the menu screen 221 of the next page in the multiple pages shown in Figure 32. Here, even if the menu button 28 is pressed and held, the time required from selecting the first item (nikujaga) to selecting the next item (chawanmushi) on this menu screen 221 is set to a second time (e.g., 1.0 second), which is longer than the first time (e.g., 0.5 seconds) mentioned above.
[0062] When the menu screen 221 transitions to the next page, the user performing the operation cannot immediately grasp the items listed on that next page. Nevertheless, if the item the user wants to select and set is located at the top of that next page, and the user continues to hold down the menu button 28, if the time required to move sequentially between items (first time) is short, there is a risk of overshooting the first item (nikujaga) and selecting the next item (chawanmushi in Figure 33). In this case, the user is forced to redo the item selection to select the desired item (nikujaga), which is cumbersome. Therefore, the time required from selecting the first item (nikujaga) to selecting the next item (chawanmushi) on the next page of the menu screen 221 is set to a second time (e.g., 1.0 second), which is longer than the first time (e.g., 0.5 seconds). This time processing is the same when the menu screen 221 has subsequent pages such as the third page, fourth page, etc.
[0063] The menu screen 221 also displays a heat level indicator 223 showing the currently set heat level (low, medium, or high), and a cooking precautions indicator 224 corresponding to the currently selected item.
[0064] Figures 34 to 36 are plan views showing examples of screen transitions when the heat level adjustment screen is inserted. The example in Figure 34 is an example of the screen display of the display device 31 when heating area 3R is in operation, so as described above, the heating status (heat level) in heating area 3R is displayed in the display area 202. In this state, if the user wants to operate heating area 3L as well, they press the menu button 28 corresponding to heating area 3L. This transitions to the menu screen 231 as exemplified in Figure 35, and this screen is displayed in full screen on the display device 31.
[0065] On the menu screen 231, the menu button 28 allows the user to select various heating options such as "deep-frying" and "grilling" from the menu display area 241, and the heat level can be adjusted using the heat level reduction button 26, heat level increase button 27, etc. (Figure 3) (the adjusted heat level is displayed in the heat level display area 242). Then, by operating the first power (start) button 22 (Figure 3), the 3L heating area can be operated according to the selected settings. However, while operating the control device 13 while viewing the menu screen 231, it may be necessary to adjust the heat output of the currently operating heating area 3R.
[0066] In this case, the user operates one of the buttons corresponding to the desired heat level adjustment, such as the heat level reduction button 26 or heat level increase button 27 (Figure 3), which corresponds to the heating area 3R. Then, a heat level adjustment screen 232, as illustrated in Figure 36, is displayed in full screen on the display device 31, replacing the menu screen 231. Here, the user makes the desired heat level adjustment using the heat level reduction button 26 or heat level increase button 27, etc., which correspond to the heating area 3R, while viewing the heat level adjustment screen 232. However, if a predetermined time (for example, 3 seconds) has elapsed while the heat adjustment screen 232 is displayed on the display device 31, the system will automatically transition to the menu screen 231 (Figure 35) that was being operated, without any user intervention. In other words, if the heat adjustment of the heating area corresponding to the heat adjustment screen 232 has not been performed for a predetermined time by operation of the control device 13, the display device 31 will return the display to the full-screen display of the menu screen 231.
[0067] Thus, while the menu screen 231 is displayed to activate a non-operating heating area 3R, 3M, 3L, or grill 14, it may be necessary to adjust the heat output of another operating heating area 3R, 3M, 3L, or grill 14. In this case, the screen display transitions from the menu screen 231 to the heat output adjustment screen 232, but the heat output adjustment itself is often completed in a short time. In this case, if the display of the heat output adjustment screen 232 continues for a predetermined time without operation of the heat output decrease button 26, heat output increase button 27, etc. (i.e., if no heat output adjustment is performed for the predetermined time), the display on the display device 31 can be transitioned from the heat output adjustment screen 232 to the menu screen 231, indicating that the heat output adjustment is complete, for the convenience of the user. When transitioning from the heat output adjustment screen 232 to the menu screen 231, it is convenient for the user to display the menu screen 231 in the state it was in before transitioning to the heat output adjustment screen 232 (returning the display to the full-screen display of the menu screen 231). This process is common to heating areas 3R, 3M, and 3L, and grill 14.
[0068] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are included. For example, the embodiments described above are described in detail to make the present invention easier to understand, and are not necessarily limited to those having all the configurations described. Furthermore, it is possible to replace parts of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add configurations from other embodiments to the configuration of one embodiment. In addition, it is possible to add, delete, or replace parts of the configuration of each embodiment with other configurations.
[0069] Furthermore, each of the above configurations, functions, processing units, and processing means may be implemented in hardware, either partially or entirely, by designing them as integrated circuits, for example. Alternatively, each of the above configurations and functions may be implemented in software by having the processor interpret and execute programs that implement each function. Information such as programs, tables, and files that implement each function can be stored in memory, a recording device such as a hard disk or SSD (Solid State Drive), or a recording medium such as an IC card, SD card, or DVD.
[0070] Furthermore, the control lines and information lines shown are those deemed necessary for explanatory purposes, and not all control lines and information lines are necessarily shown in the actual product. In reality, it can be assumed that almost all components are interconnected. [Explanation of Symbols]
[0071] 1 induction cooker 2 Top plate 3,3R,3M,3L heating area 4. Induction heating coil 11 Main unit 13 Operating device 13MR No. 1 Grille Control Unit 14 Grill 22. First power button 23. Low heat button (First heat control section) 24. Medium heat button (First heat control unit) 25. High heat button (First heat control section) 26. Lowering the firepower button (First firepower control unit) 27. Increase firepower button (First firepower control unit) 31 Display device 31a Reception area 31b Non-receiving area 31a2 Button section (second grille operation section) 51 Initial screen 61 Second power button 62. Low heat button (Second heat control unit) 63 Medium heat button (Second heat control unit) 64. High heat button (Second heat control unit) 51 Menu screen 131 Menu screen 151 Menu screen 231 Menu screen 232 Firepower adjustment screen N Heating target
Claims
1. The top plate located on the top of the main unit, Multiple heating regions are set at various locations on the top plate, each of which is a heating region that heats the object to be heated placed at that location. An induction heating coil is provided corresponding to the position of each heating region below the top plate, An operating device that receives various operations on the main unit, The main unit comprises a display device that displays various messages, The display device displays the heating status of the object to be heated in all heating regions within a single screen. The induction heating cooker is characterized in that the display device is capable of displaying any page of a multi-page screen that lists predetermined items relating to the heating status for any of the heating regions, and when the user presses and holds down a button on the operating device for selecting a predetermined item while any of the pages is being displayed by the user, the display device sequentially moves the selection of the listed predetermined items every first hour, and when the screen display transitions to the next page of the multi-page screen due to the user continuing to press and hold the button after selecting the last predetermined item on the page, the time required from the selection of the first predetermined item to the selection of the next predetermined item on the page after the transition is a second hour, which is longer than the first hour.
2. The top plate located on the top of the main unit, Multiple heating regions are set at various locations on the top plate, each of which is a heating region that heats the object to be heated placed at that location. An induction heating coil is provided corresponding to the position of each heating region below the top plate, An operating device that receives various operations on the main unit, The main unit comprises a display device that displays various messages, The display device displays the heating status of the object to be heated in all heating regions within a single screen. The main body is equipped with a grill, The display device also displays the heating status of the object to be heated by the grill, along with the heating status in all of the heating regions. The induction heating cooker is characterized in that the display device is capable of displaying any of the pages of a multi-page screen which lists predetermined items relating to the heating status for each of the heating regions and the grill, and when the user long-presses the button for selecting the predetermined items on the operating device while any of the pages is displayed, the display device sequentially moves the selection of the listed predetermined items every first hour, and when the screen display transitions to the next page of the multi-page screen due to the user continuing the long-press operation after the last predetermined item has been selected on that page, the time required from the selection of the first predetermined item to the selection of the next predetermined item on the page after the transition is a second hour which is longer than the first hour.