JP7270168B2 - Induction cooker and computer program - Google Patents

Description

The present disclosure relates to an induction heating cooker and a computer program executed by a computer of the induction heating cooker.

Induction heating cookers have been widely used in general household kitchens and commercial use. For example, in Patent Document 1, the operation keys of a plurality of heating means are separated by main function to make them easier to understand, and to prevent erroneous operation, improving usability and safety. A formula cooker is disclosed.

JP 2007-109424 A

When operating an operation key that is used infrequently, the user may be confused about how to operate the operation key. In particular, in the current situation where cooking devices are becoming more and more multi-functional, the method of operating the operation keys may become complicated, so it is thought that there are many opportunities for such confusion. The operability of the cooking device can affect the efficiency of the user's cooking work. There is a need for a heating cooker with improved operability.

The present disclosure provides an induction heating cooker with improved operability and a computer program executed by a computer of the induction heating cooker.

An induction heating cooker according to one aspect of the present disclosure includes a main body, a heating coil that induction-heats an object to be heated, a top plate placed on the upper surface of the main body together with the heating coil, a home key provided on the side surface of the main body, and a home key. and a plurality of keys including one or more selection keys; a display unit provided on the side; and processing the input received by the main body operation unit to control the display of the display unit. and an operation control unit. The operation control unit displays on the display unit a home screen, which is a screen at the highest level of hierarchically arranged menu items, and displays the home screen when the main body operation unit receives an input to one or more selection keys. is switched to display in a lower hierarchy, and when the main body operation unit receives an input to the home key, the home screen is displayed regardless of the hierarchy of the currently displayed screen.

A computer program according to one aspect of the present disclosure is executed by an operation control unit of an induction heating cooker. The induction heating cooker includes a main body, a heating coil for induction heating of an object to be heated, a top plate placed on the upper surface of the main body together with the heating coil, and a home key and one or more selection keys provided on the side of the main body. , a display unit provided on the side, and an operation control unit that processes the input received by the main body operation unit and controls the display of the display unit. ing. The computer program causes the operation control unit to display, on the display unit, a home screen, which is a screen at the highest level of hierarchical menu items, and when the main body operation unit receives an input to one or more selection keys, When the home screen is switched to a screen of a lower hierarchy and the main body operation unit receives an input to the home key, the home screen is displayed regardless of the hierarchy of the currently displayed screen.

According to the present disclosure, it is possible to improve the operability of the induction heating cooker.

1 is a perspective view of an induction cooker according to an exemplary embodiment; FIG. FIG. 4 is a perspective view of an induction cooker according to an exemplary embodiment, with the main body operating section pulled out; Block diagram showing the control system of the induction heating cooker according to the present embodiment Schematic diagram of the configuration of an induction heating cooker Partial schematic diagram of top panel operation unit and top panel display unit Enlarged view of the area around the top panel operation unit and display unit before the power is turned on Partially enlarged view of the top panel operation unit and display unit after power is turned on Partially enlarged view around the main unit operation unit and display unit before turning on the power Partially enlarged view of main unit operation unit and display unit after power-on A diagram showing the correspondence relationship between the operation unit and menu items when selecting each item on the menu using the operation unit. A diagram showing the correspondence when the number of menu items and the number of operation units are different. Diagram showing an example of display transition from the home screen menu item ("Manual") Diagram showing an example of display transition from the home screen menu item ("oven") Diagram showing an example of display transition from the home screen menu item (“Frozen IH grill”) Diagram showing an example of display transition from the home screen menu item ("Automatic") A diagram showing an example of the transition of the display on the display when "Maintenance" is selected after pressing the tool button. A diagram showing an example of transition of the display on the display when "range hood" is selected after pressing the tool button. A diagram showing an example of display transition when "Settings" is selected after pressing the tool button Flowchart showing the procedure of transition processing to the home screen FIG. 15B is a flowchart showing the procedure of transition processing to the home screen according to the application example of FIG. 15A; A diagram showing an example in which a home key is provided near the top surface operation unit and top surface display unit on the top plate. Diagram showing an example of display transition from the home screen of the top panel display unit

An induction heating cooker according to an exemplary aspect of the present disclosure has a body-side operation section and a display section on the side of the body of the induction heating cooker, typically on the side facing the user's standing position during cooking. ing. The body-side operation unit has a plurality of keys for receiving user input. The plurality of keys includes a home key and one or more select keys. For example, after the power is turned on, the operation control unit of the induction heating cooker displays an initial screen on the display unit. The initial screen is the screen at the highest level of hierarchical menu items. When an input to one or more selection keys is accepted, the main body side operation unit switches the home screen displayed on the display unit to a lower hierarchical screen. For example, in order for the user to set the induction heating cooker, it is conceivable that the user operates the main body side operation unit to change setting items in lower layers that are not used on a daily basis. However, even if a user who is unfamiliar with the setting proceeds with the operation, the desired setting item cannot be reached, and the operation may be lost. Such users usually often feel that they want to start the operation again from the beginning.

Therefore, when the user presses the home key provided on the main unit side operation unit, the main unit side operation unit that receives the input to the home key displays the home screen on the display unit regardless of the hierarchy of the currently displayed screen. do. This makes it very easy for the user to start the operation again from the beginning. By performing the operation again, the user can reach the desired setting item while confirming various items. By providing the home key, the user can efficiently proceed with subsequent cooking operations.

Generally, the top plate of an induction cooker is much wider than the sides. The top plate of the induction heating cooker can also be provided with a display section for displaying some information and an operation section for user operation. However, since users often cook on the top plate, it may be difficult to allocate an area for the display unit and the operation unit due to the arrangement of a plurality of heating coils. Also, even if a wide display is provided in a position where the heating coil is not installed, most of the display will be hidden if cooking utensils such as pots and frying pans are placed in such a position, making it difficult to ensure visibility. sex can also occur. For this reason, the present inventors minimized the area of the operation unit and the display unit on the top plate, provided the operation unit on the side surface of the main body, and further secured a relatively wide display area. I thought it would be appropriate to have a section. With such a configuration, it is possible to ensure both high visibility and operability. Note that the present disclosure does not exclude providing an operation unit and a display unit on the side surface of the main body, and further providing the operation unit and the display unit on the top plate.

Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of well-known matters and redundant descriptions of substantially the same configurations may be omitted. This is to avoid unnecessary verbosity in the following description and to facilitate understanding by those skilled in the art. It should be noted that the inventors provide the accompanying drawings and the following description for a full understanding of the present disclosure by those skilled in the art, and not for limiting the claimed subject matter.

(1) Embodiment (1-1) Overview Hereinafter, an induction heating cooker according to an embodiment of the present disclosure will be described with reference to FIGS. 1A to 3. FIG.

FIG. 1A is a perspective view of an induction cooker 1 according to an exemplary embodiment. FIG. 1B is a perspective view of the induction heating cooker 1 with the operation panel 40 pulled out. FIG. 2 is a block diagram showing the control system of the induction heating cooker 1. As shown in FIG. FIG. 3 is a diagram schematically showing the configuration of the induction heating cooker 1. As shown in FIG.

In addition to FIGS. 1A, 1B, and 3, some of the drawings of the present disclosure are labeled with an X-axis, a Y-axis, and/or a Z-axis. When the user faces the induction heating cooker while using the induction heating cooker, the X-axis direction indicates the width direction (longitudinal direction) of the heating cooker, and the Y-axis direction indicates the depth direction (lateral direction). , the Z-axis direction indicates the height direction. Also, the positive direction of the X-axis is defined as the right direction, and the negative direction is defined as the left direction. Also, the positive direction of the Y-axis is the rearward direction, and the negative direction is the forward direction.

《Induction Heating Cooker》
First, the general configuration of the induction heating cooker 1 according to the present disclosure will be described.

As shown in FIG. 1A, the induction heating cooker 1 has a main body 3 and a top plate 5 on which a container is placed on the upper surface of the main body 3 . The container is, for example, an object to be heated that accommodates ingredients to be cooked, such as stew.

Heating coils 7, 8, 9 are placed. In other words, the heating coils 7 , 8 , 9 are mounted on top of the body 3 together with the top plate 5 . Heating coils 7-9 generate an induction magnetic field to inductively heat the container. Although the heating cooker 1 has three heating coils 7 to 9, it may have one, two, or four or more heating coils.

In the induction heating cooker 1, for example, operation units 19, 20, and 21 are provided for operating the heating coils 7, 8, and 9, respectively. That is, each of the heating coils 7, 8, 9 "corresponds" to each of the operating portions 19, 20, 21. As shown in FIG. Thus, the components provided for each of the heating coils 7, 8, 9 are referred to herein as components "corresponding" to the heating coils.

As shown in FIG. 1A, on the top plate 5 on the upper side (+Z side) of the heating coils 7 to 9, there are ring-shaped rings indicating the container mounting areas "corresponding" to the heating coils 7, 8 and 9, respectively. markers 11, 12 and 13 are printed.

When viewed from above, ring-shaped light-emitting portions 15 and 16 are arranged outside the heating coils 7 and 8 on the top plate 5 . An arc-shaped light-emitting portion 17 is arranged on the top plate 5 in front of the heating coil 9 (−Y side). The light-emitting units 15-17 emit light, for example, when the corresponding heating coils 7-9 are energized. The light emitting units 15 to 17 each have, for example, an LED light emitting board (not shown).

A temperature sensor 18 is arranged below the top plate 5 inside the markers 11 to 13 . A detection value detected by the temperature sensor 18 is sent to the control unit 31 . The control unit 31 adjusts the amount of current flowing through the heating coils 7 to 9 while referring to the temperature detection value, and determines the timing of assist guidance of the cooking method. Note that the light emitting units 15 to 17 and the temperature sensor 18 are not essential components, and the induction heating cooker 1 can operate even if they are not mounted.

On the front side (-Y side) of the top plate 5 of the induction heating cooker 1, operation sections 19, 20 and 21 are arranged. The operating units 19, 20, 21 are used by the user to operate the heating coils 7-9, respectively. The operating part 19 is provided to operate the heating coil 7 , the operating part 20 is provided to operate the heating coil 8 , and the operating part 21 is provided to operate the heating coil 9 . In this specification, the operating part 19 corresponds to the heating coil 7 , the operating part 20 corresponds to the heating coil 8 , and the operating part 21 corresponds to the heating coil 9 .

Display units 23, 24, and 25 are arranged on the front side of the top plate 5 of the induction heating cooker 1, between the heating coils 7-9 and the operation units 19-21, respectively. The display units 23, 24 and 25 respectively display the states of the operation targets of the operation units 19-21. Operations of the display units 23 to 25 are controlled by a control unit 31, which will be described later. In this specification, the operation units 19 to 21 provided on the top plate 5 are sometimes called “top surface operation units 19 to 21”, and the display units 23 to 25 are sometimes called “top surface display units 23 to 25”. .

The display units 23 to 25 each include, for example, a matrix-dot liquid crystal display device. The matrix dot liquid crystal display device is, for example, a full dot liquid crystal display panel having a band shape extending in the width direction of the top plate 5 .

The display units 23 to 25 respectively display the state of the operation target, the contents of the operation of the heating coils 7 to 9, and the like as image objects. For example, the display unit 23 displays the details of the operation of the heating coil 7 , the display unit 24 displays the details of the operation of the heating coil 8 , and the display unit 25 displays the details of the operation of the heating coil 9 .

Image objects are text and/or images. For example, the image object is the word "heat". At this time, the induction heating cooker 1 indicates that the heating operation can be performed using the heating coils 7-9 corresponding to the display portions 23-25. In addition, the display units 23 to 25 may display an image object of characters "start" indicating the start of heating together with the characters "heating". After the heating is started, the display units 23-25 may display image objects such as numbers and icons indicating the magnitude of the heating amount (thermal power) of the heating coils 7-9.

The display units 23 to 25 may be segment display liquid crystal display devices. Text and/or images displayed using one or more segments fall under the category of image objects described above.

The main body 3 is provided with a speaker 27 for outputting information regarding heating of the heating coils 7-9. The speaker 27 is arranged on the front side of the induction heating cooker 1 and outputs voice guidance to the user.

The main body 3 is also provided with an operation section. FIG. 1A shows a state in which the operation panel 40 is stored. FIG. 1B shows a state in which the operation panel 40 is pulled out. For example, when the user lightly presses the operation panel 40 in the +Y direction, the operation panel 40 is unlocked and pulled out in the -Y direction. Alternatively, when the user turns on the power switch 22, a motor (not shown) may operate to send out the operation panel 40 in the -Y direction. When the induction heating cooker 1 is not in use, the operation panel 40 , and the display section 41 , operation sections 42 , 43 and 50 of the operation panel 40 to be described below are housed inside the main body 3 .

The operation panel 40 has a display section 41 and operation sections 42 , 43 and 50 . If the display units 23-25 are matrix-dot liquid crystal displays, the display unit 41 may also be a matrix-dot liquid crystal display. Alternatively, the display unit 41 may be an organic EL (Electro Luminescence) display device. That is, the display units 23 to 25 and the display unit 41 may be implemented by display devices that display images and/or characters according to the same display principle, or may be implemented by display devices that display images and/or characters according to different display principles. may be implemented.

This embodiment assumes a display device that employs a dot-matrix display principle that enables more flexible display, rather than a segment display principle. The reason is that various information can be displayed on the display section 41 in response to the multifunctionalization of the induction heating cooker 1 . With the dot matrix method, various setting items can be displayed while switching the display, for example. Any display method can be used as long as the display unit 41 employs a display method capable of flexible display such as a dot matrix method.

"Switching" as used in this specification typically means that the content displayed on the display unit 41 is completely rewritten and new content is displayed. The advantage of "switching" the display is that the limited display area can be effectively used. If all the content that has been displayed so far is displayed to the user, a large display area is required, and the display area for displaying new content is reduced. "All contents displayed so far" means, for example, the displayed contents when additionally displaying new contents on the same screen while maintaining the contents that have been displayed so far. do. On the other hand, when the content that has been displayed so far, for example, the content that was displayed on the first screen is not displayed and is completely rewritten to switch the display, the new content is displayed over the entire display area of the display unit 41. The amount of information that can be presented can be increased. Alternatively, the visibility can be greatly improved by displaying characters in a large size instead of increasing the amount of information.

As clearly shown in FIG. 1B, the top plate 5 is mounted on the upper surface of the main body 3 together with the heating coils 7-9, while the operating panel 40 or operating parts 42, 43 and 50 of the main body 3 are It is provided on the side surface of the main body 3 and accepts user input with a plurality of keys including a home key (operation unit 50) and one or more selection keys (operation units 42 and 43).

The operating sections 42 , 43 and 50 are used to operate the grille 44 of the main body 3 and perform various settings of the main body 3 . A heating coil (not shown) is also provided within the grill 44 . A more detailed description of the display unit 41 and the operation units 42, 43 and 50 will be given later. In this specification, the operation units 42, 43 and 50 may be collectively referred to as "main body operation unit". The main body operation section and the top surface operation section may be collectively called the "operation section". Also, the heating coil and the operation section and display section corresponding to the heating coil may be referred to as a set of "heating unit". For example, the heating coil 7, the operating portion 19 and the display portion 23 shown in FIG. 1A are one set of heating units, and the heating coil 8, the operating portion 20 and the display portion 24 are another set of heating is a unit. Similarly, grill 44, controls 42 and 43, and display 41 shown in FIG. 1B are also a set of heating units. The operation units 42 and 43 are also used for setting the induction heating cooker 1 and not only for operating the grill 44 . Therefore, only the buttons or switches related to the operation of the grill 44 among the operation parts 42 and 43 may be included in the set of heating units for the grill 44 .

As shown in FIG. 2 , the induction heating cooker 1 includes a control section 31 and a storage section 33 inside the main body 3 . The control unit 31 includes signal processing circuits such as a CPU and a microcontroller (microcomputer). The storage unit 33 is a storage device such as ROM, RAM, hard disk, and SSD. The storage unit 33 stores computer programs for operating the induction heating cooker 1 . The control unit 31 is configured to perform various functions described later by executing the computer program.

The control unit 31 executing the computer program operates as a heating control unit 35, an operation control unit 37 and a cooking guidance control unit 39 from time to time. For example, when the control unit 31 controls the amount of current flowing through the heating coils 7 to 9 and the heating coil in the grill 44 (hereinafter referred to as “heating coil for the grill 44”), the control unit 31 controls the heating control unit 35 works as Further, when the control unit 31 controls the input received by the operation units 19 to 21 and controls the display in the display areas of the display units 23 to 25, the control unit 31 operates as the operation control unit 37. FIG. When the control unit 31 controls the information output of the cooking guidance, the control unit 31 operates as the cooking guidance control unit 39 . However, part or all of the heating control unit 35, the operation control unit 37, and the cooking guidance control unit 39 may not be realized by software, and may be composed of one or more CPUs, microprocessors, and FPGAs. good too. The heating means for the grill 44 may be other than the heating coil. For example, the heating means of the grill 44 may be a sheathed heater, a plane heater, a microwave generator, or a combination of some or all of these. The heating control unit 35 only needs to be able to supply power to these heating means and control heating.

Output signals from the operation units 19 to 21 , 42 , 43 and 50 are input to the control unit 31 . The control unit 31 sets the heating amounts of the heating coils 7 to 9 and the heating coil for the grill 44 according to the operation. The control unit 31 functioning as the heating control unit 35 controls the start or stop of heating of the heating coil 7 according to the operation instruction of the operation unit 19 . The heating control unit 35 supplies high-frequency current to the heating coils 7 to 9 to heat the container placed on the top plate 5 . Further, the heating control unit 35 controls the amount of heating from the heating coils 7-9 by controlling the amount of current flowing through the heating coils 7-9. In addition, since the output signals of the operation units 19 to 21 are input to the control unit 31, they are also used to control the operation of the control unit 31 functioning as the operation control unit 37 and the cooking guidance control unit 39. Further, the heating control unit 35 supplies a high-frequency current to the heating coil for the grill 44 to heat the object in the grill 44 in the same manner as the heating coils 7 to 9 . In addition, the heating control unit 35 controls the amount of heating from the heating coil by controlling the amount of current flowing through the heating coil for the grill 44 .

The cooking guidance control unit 39 sends cooking guidance information to the operation control unit 37 at the timing when appropriate conditions are established according to a predetermined heating sequence or cooking sequence. Appropriate conditions include whether or not the temperature detected by the temperature sensor 18 satisfies a predetermined temperature condition, or whether or not a predetermined time has elapsed since the detected temperature reached a predetermined temperature. is the condition of These conditions are set for each assist menu for cooking guidance. When the cooking guidance control unit 39 determines that these conditions are satisfied, the cooking guidance control unit 39 instructs the operation control unit 37 to display cooking guidance corresponding to the conditions from the display units 23-25. These heating sequence, cooking sequence, and cooking guidance are stored in the storage unit 33 .

<<Operation unit and display unit>>
Next, the operation units 19 to 21, the operation units 42, 43 and 50, and the display units 23 to 25 and 41 will be described with reference to FIGS. 4 and 5A to 6B.

First, refer to FIG. The operating sections 19 to 21 each include a first operating section 51, a second operating section 53, a third operating section 55, and a fourth operating section 57. As shown in FIG. The first operation unit 51 to the fourth operation unit 57 may be, for example, touch switches including capacitive switches, or push button switches. The first operation section 51 to fourth operation section 57 set the heating operation of the corresponding heating coils 7 to 9 . The first operation unit 51 is printed with a clock pattern and is mainly used to select timer settings. The second operation unit 53 and the third operation unit 55 are printed with arrow patterns, such as “<” and “>” symbols, respectively, and are mainly used for menu selection and setting the heating power amount and timer time. used for The fourth operating portion 57 is printed with a pattern indicating the heating area corresponding to the operating portion, and functions as a multifunction switch to which different functions are assigned depending on the situation. The power switch 22 has a function of turning on the power of the induction heating cooker 1 . The power switch 22 may further have a function of shutting off the power of the induction heating cooker 1 . Aside from the power switch 22, a switch for cutting off the power may be provided.

The first operating portion 51, the second operating portion 53, the third operating portion 55 and the fourth operating portion 57 included in each of the operating portions 19, 20 and/or 21 are also collectively referred to as "operating units" in this disclosure. be. The operation unit is an interface that receives a user's heating operation and/or various settings. The operation unit may be composed of any part of the first operation section 51 , the second operation section 53 , the third operation section 55 and the fourth operation section 57 .

(1-2) Details Next, the induction heating cooker 1 according to the present disclosure will be described in detail. For convenience of explanation, the top panel operation section 20 and the top panel display section 24 on the top plate 5, which constitute a set of heating units, are exemplified.

FIG. 5A is a partially enlarged view around the top surface operation unit 20 and the top surface display unit 24 before power is turned on to the induction heating cooker 1. FIG. When the power switch 22 is pressed by the user, the power of the induction heating cooker 1 is turned on.

FIG. 5B shows what is displayed on the top surface display section 24 immediately after the induction heating cooker 1 is powered on. An image object 30 called “Menu” is displayed on the top surface display section 24 . Below the characters "Menu", other image objects "<" and ">" are shown. These image objects mean that it is possible to transition to another screen display by pressing the second operation section 53 and the third operation section 55 provided directly below them.

Next, the body operating sections 42, 43 and 50 will be described with reference to FIGS. 6A and 6B. FIG. 6A is a partially enlarged view of the main body operation sections 42, 43 and 50 and the display section 41 and their surroundings before the induction heating cooker 1 is powered on. When the power switch 22 is pressed by the user, the power of the induction heating cooker 1 is turned on.

FIG. 6B shows what is displayed on the display unit 41 immediately after the induction heating cooker 1 is powered on. An image object called "menu" is displayed in the upper part of the display unit 41, and image objects of selectable menus ("manual", "oven", "frozen IH grill", "automatic") are displayed below it. is displayed. Each image object can be selected by the first operation section 61, the second operation section 63, the third operation section 65, and the fourth operation section 67 of the main body operation section 42 displayed directly below. The body operation unit 43 is used to perform maintenance operations such as cleaning of the induction heating cooker 1, setting of operations, and the like. A specific example of the display on the display unit 41 when the main body operation unit 43 is pressed will be described later. In this specification, the first operation section 61, the second operation section 63, the third operation section 65, the fourth operation section 67 and/or the main body operation section 43 are referred to as "selection", focusing on the function of selecting an item. It is sometimes called a key. The induction heating cooker 1 has one or more selection keys.

The operation unit 50 is a home key. The “home key” is a key for returning the screen currently displayed on the display unit 41 to the home screen. The operation unit 50 may be described as a "home key 50". An example of the home screen is the screen displayed immediately after power-on, as shown in FIG. 6B. When the user presses the home key 50 of the main body side operation section, the main body side operation section that has received the input to the home key 50 displays the home screen on the display section 41 regardless of the screen currently being displayed. As an example, the home screen is a screen corresponding to the highest hierarchy. In this embodiment, the display unit 41 displays various hierarchical menu items. When the user hesitates about the operation due to the hierarchization of menu items, by pressing the home key 50, the user can very easily restart the operation from the first home screen. By performing the operation again, the user can reach the desired setting item while confirming various items. In other words, by providing the home key 50, the user can efficiently proceed with subsequent cooking operations. Later, an example of display transition of the display unit 41 when the user presses the home key 50 in various hierarchies and prohibiting the display transition will be described.

In the description so far, it is assumed that the top panel operation section 20 and the main body operation sections 42, 43, and 50 are switches realized by hardware. However, all or part of the top panel operation section 20 and main body operation sections 42, 43 and 50 may be implemented by software switches that do not include a display section. Alternatively, all or part of the top panel operation section 20 and main body operation sections 42 , 43 and 50 may be implemented by software switches and touch panels displayed on the display sections 24 and 41 .

For example, a touch panel (not shown) may be provided superimposed on the display units 24 and 41 to detect user's touch operation, pressing operation, and the like. A touch panel detects a user's touch and a touch position based on pressure, changes in capacitance, and the like. For example, the control unit 31 determines which display position of the top surface operation unit 20 and main body operation units 42, 43 and 50 corresponds to the touch position, and executes the function associated with the operation unit. . A touch panel is an example of an input device. Alternatively, an input device that detects the position of the user's finger and the input operation in a non-contact manner may be employed. For example, a proximity sensor capable of detecting the presence or absence of nearby objects and their positions by means of radio waves, infrared rays, etc. is installed, and by detecting the hand held up using the proximity sensor, the top surface operation unit 20 and the main body operation unit 42, Manipulation to 43 and 50 can be detected. By using such a proximity sensor, it is possible to perform operations without worrying about dirty hands during cooking.

Next, a method of selecting items displayed on the display unit 41 using the operation unit 42 will be described with reference to FIGS. 7A and 7B.

FIG. 7A shows the correspondence relationship between the operation unit and menu items when using the operation unit to select each item of the menu. In this embodiment, various menu items displayed on the display unit 41 are selected by pressing operation units associated with respective positions of various menu items. In the example of FIG. 7A , the menu item 71 (“manual”) displayed on the display unit 41 is selected by pressing the operation unit 61 associated with the position of the menu item 71 . A double arrow indicates that the menu item 71 and the first operation unit 61 are associated with each other. Similarly, menu item 73 ("oven") is operated by second operating section 63, menu item 75 ("frozen IH grill") is operated by third operating section 65, and menu item 77 ("automatic") is operated by fourth operating section 65. It is associated with the operation unit 67 . Each menu item 73, 75 and 77 is selected by pressing each operation section 63, 65 and 67. FIG.

In the example of FIG. 7A, the number of menu items displayed on the display unit 41 and the number of operation units match. On the other hand, both numbers may not match.

FIG. 7B shows the correspondence when the number of menu items and the number of operation units are different. The display unit 41 includes a major item display 80a and a medium item display 80b. The medium item display 80b further includes small item displays (timer item 81, selection item 83 and start item 87). In this example, three sub-items are displayed. On the other hand, the four operating sections (first operating section 61 to fourth operating section 67) are the same as in FIG. 7A.

In FIG. 7B, the selection item 83 is displayed wider than the width of the timer item 81 and the start item 87 in the horizontal direction of the drawing. In such a case, in this embodiment, the timer item 81 is associated with the first operation section 61, the selection item 83 is associated with the second and third operation sections 63 and 65, and the start item 87 is associated with the second operation section 65. 4 operation unit 67 is associated. Each corresponding item is selected by pressing the operation unit. The selection item 83 is selected regardless of whether the second operation portion 63 is pressed or the third operation portion 65 is pressed. However, if the selection item 83 is associated with, for example, an increase or decrease in a set value such as a temperature setting, pressing the second operating section 63 decreases the temperature, and pressing the third operating section 65 increases the temperature. means the operation of selecting

In the following description, "selecting" an item displayed on the display unit means that the user presses the operation unit corresponding to the item. For convenience of explanation, the drawing shows the operation unit to be pressed.

Examples of lower layers traced from each menu item displayed on the home screen of the display unit 41 will be described with reference to FIGS. 8 to 11 . From these figures, it is explained that the content of the screen displayed on the display unit 41 transitions over a plurality of hierarchies. For convenience of understanding, how the display contents change will be described. That is, the operation control section 37 controls the display section 41 to perform necessary display. The top level of each figure is "hierarchy 0", and the lower the hierarchy, the higher the number is, such as hierarchy 1, hierarchy 2, and so on. In the drawings, when the number of input operations received by the operation control unit 37 is 1, it is indicated by "x1", and when it is n times, it is indicated by "xn".

FIG. 8 shows an example of display transition from the menu item 71 (“Manual”) on the home screen. When the first operation unit 61 is pressed, the display on the display unit 41 transitions to "grill manual" which is a manual menu for the grill 44. FIG. The display of Tier 1 is the same as in FIG. 7B. When the first operation unit 61 is pressed in hierarchy 1, the hierarchy 2 is entered, and a timer setting menu is displayed on the display unit 41. FIG. Here, when the third operation unit 65 is pressed a predetermined number of times, the numerical value of the timer is displayed as the user's desired time (for example, "30 minutes"). By pressing the third operation unit 65, the timer time "30 minutes" is additionally displayed. The display on the display unit 41 cannot be rewritten. In other words, the display on the display unit 41 does not transition. Thereafter, when the fourth operating portion 67 is pressed, heating is started.

FIG. 8 shows a dashed line 8a surrounding the tier 1 and tier 2 representations. A dashed line 8a indicates a range in which the display of the display section 41 transitions to the home screen of hierarchy 0 when the user presses the home key 50 while the display section 41 is displaying the content within the dashed line 8a. That is, when main body operation unit 37 receives an input to home key 50, the home screen is displayed regardless of whether the hierarchy of the currently displayed screen is hierarchy 1 or hierarchy 2. FIG.

On the other hand, when the fourth operating portion 67 is pressed on Level 1, or when the fourth operating portion 67 is pressed after the timer time is set on Level 2, heating is started. At this time, the display screen of the display unit 41 transitions to the display content surrounded by the dashed line 8b. The dashed line 8b means that even if the user presses the home key 50 while the display section 41 is displaying the contents within the dashed line 8b, the display on the display section 41 does not transition to the home screen of the hierarchy 0. FIG. In other words, the dashed line 8b indicates the transition to the home screen when the operation control unit 37 receives an input to the home key 50 while the heating control unit 35 is supplying power to the heating coil for the grill 44. means to ban. As a result, heating of the grill 44 continues.

FIG. 9 shows an example of display transition from the menu item 73 (“oven”) on the home screen.

When the second operation unit 63 is pressed, the display on the display unit 41 changes to "oven" which is the oven menu of the grill 44. FIG. When the first operation unit 61 is pressed in hierarchy 1, the hierarchy 2 is entered, and a timer setting menu for oven use is displayed on the display unit 41 . When the third operation unit 65 is pressed here, the numerical value of the timer is displayed as "30 minutes". By pressing the third operation unit 65, the timer time "30 minutes" is additionally displayed. The display on the display unit 41 cannot be rewritten. In other words, the display on the display unit 41 does not transition. Thereafter, when the fourth operation portion 67 is pressed, the heating control portion 35 supplies electric power to the heating coil for the grill 44 to start heating.

The tier 1 and tier 2 representations are enclosed by dashed lines 9a shown in FIG. Further, the display unit 41 after the fourth operation unit 67 is pressed on the hierarchy 1 or after the fourth operation unit 67 is pressed after the timer time is set on the hierarchy 2 is surrounded by the dashed line 9b.

The meanings of dashed lines 9a and 9b are the same as those of dashed lines 8a and 8b in FIG. 8, respectively. During the display within the dashed line 9a, when the main body operation unit 37 receives an input to the home key 50, the home screen is displayed regardless of whether the hierarchy of the currently displayed screen is hierarchy 1 or hierarchy 2. . On the other hand, during the display within the dashed line 9b, when the operation control unit 37 receives an input to the home key 50, transition to the home screen is prohibited.

FIG. 10 shows an example of display transition from the menu item 75 (“Frozen IH grill”) on the home screen. Further, FIG. 11 shows an example of display transition from the menu item 77 (“automatic”) on the home screen. In either case, after transitioning from hierarchy 0 to hierarchy 1, one menu item is selected from various menu items in hierarchy 1. FIG. After that, when the fourth operation portion 67 is pressed, heating is started.

In Figures 10 and 11, the Tier 1 representation is enclosed by dashed lines 10a and 11a. 10 and 11, the display on the display unit 41 after the fourth operation unit 67 is pressed in hierarchy 1 or after the fourth operation unit 67 is pressed after the timer time is set in hierarchy 2 is indicated by a dashed line. It is surrounded by 10b and 11b.

The meanings of the dashed lines 10a and 10b and the meanings of the dashed lines 11a and 11b are the same as the meanings of the dashed lines 8a and 8b, respectively. Since it can be easily guessed from the dashed lines 9a and 9b in FIG. 9, repetitive description is omitted.

Next, with reference to FIGS. 12 to 14, examples of lower layers traced from the home screen when the main body operation unit 43 is pressed will be described. Note that the main body operation unit 43 is hereinafter referred to as a "tool button 43".

FIG. 12 shows an example of transition of the display on the display unit 41 when "maintenance" is selected after the tool button 43 is pressed. After the tool button 43 is pressed, the display on the display unit 41 transitions to hierarchy 1 . When the user presses the first operation unit 61 on level 1, "maintenance" is selected and the level 2 is entered. "Maintenance" is an operation mode in which the interior of the grill 44 of the induction heating cooker 1 is heated to burn off oil stains, thereby cleaning. When the user presses the fourth operation unit 67 on level 2, heating is started.

In FIG. 12, the tier 1 and tier 2 representations are surrounded by dashed lines 12a. Further, in FIG. 12, the display of the display section 41 after the fourth operation section 67 is pressed in the hierarchy 2 is surrounded by a dashed line 12b. The meanings of the broken lines 12a and 12b are the same as the meanings of the broken lines 8a and 8b, respectively, so the explanation will be omitted.

FIG. 13 shows an example of transition of the display on the display unit 41 when the “range hood” is selected after the tool button 43 is pressed. After the tool button 43 is pressed, the display on the display unit 41 transitions to hierarchy 1 . When the user presses the second operation unit 63 on level 1, "range hood" is selected and the level 2 is entered. “Range hood” is an operation mode in which a range hood (not shown) is operated from the induction heating cooker 1 . A control line is connected from the induction heating cooker 1 to the range hood, and a control signal via the control line can rotate the fan of the range hood.

In FIG. 13, the display of hierarchy 1 and hierarchy 2 is surrounded by a dashed line 12a, and when the home key 50 is pressed in these hierarchies, the display of the display unit 41 returns to the home screen. In the example of FIG. 13, transition to the home screen is not prohibited when the home key 50 is pressed. This is because it is not an operation mode that restricts the operation of the induction heating cooker 1 like heat treatment.

FIG. 14 shows an example of transition of the display on the display unit 41 when "setting" is selected after the tool button 43 is pressed. After the tool button 43 is pressed, the display on the display unit 41 transitions to hierarchy 1 . When the user presses the third operation unit 65 in the hierarchy 1, the “setting” is selected and the transition to the hierarchy 2 is made. “Setting” is an operation mode for adjusting setting items related to the operation of the induction heating cooker 1 . Level 2 includes a total of 13 setting items. Since each setting item is only an example, detailed description is omitted.

When the user presses the fourth operation unit 67 with the setting item "sound volume setting" selected, for example, the display on the display unit 41 changes to hierarchy 3 for changing the setting contents of "sound volume setting". Transition. When the user uses the second operation section 63 and the third operation section 65 to set the desired sound volume and presses the fourth operation section 67 again, the setting is completed. At this time, a message "Set."

In the example of FIG. 14, the display of hierarchies 1 to 3 is surrounded by dashed lines 14a. When the home key 50 is pressed in any of these layers, the display on the display unit 41 returns to the home screen. When the "setting" item is selected, the operation mode does not restrict the operation of the induction heating cooker 1, so similarly to the example of FIG. 13, the transition to the home screen is not prohibited when the home key 50 is pressed.

The processing of the operation control unit 37 of the induction heating cooker 1 can be explained as the processing of FIG. 15A or 15B.
FIG. 15A is a flow chart showing the procedure of transition processing to the home screen. This processing is performed, for example, immediately after the power switch 22 of the induction heating cooker 1 is pressed.

In step S<b>10 , the operation control section 37 displays the home screen on the display section 41 .
In step S11, when receiving an input to the selection key of the first operation unit 61 or the like, the operation control unit 37 switches the display of the home screen of the display unit 41 to a display of a lower hierarchy to correspond to the selection key. display the menu items that
In step S12, when the operation control unit 37 receives an input to the home key 50, the home screen is displayed on the display unit 41 regardless of the current hierarchy, and the process ends.

As already defined, "switch" means to completely rewrite the content displayed on the display unit 41 and display new content. In step S11 described above, the display of the home screen is switched to the display of the lower hierarchy. Therefore, while the operation control unit 37 has the advantage of being able to display new content over the entire display area, it becomes difficult for the user to grasp the current position or hierarchy of menu items, and hesitation in operation may easily occur. There is In such a case, if the above-described processing using the home key 50 is performed, the display on the display unit 41 can be easily returned to the home screen even if the user gets lost in the operation on any lower layer. This makes it possible to improve user operability.

FIG. 15B is a flowchart showing the procedure of transition processing to the home screen according to the application example of FIG. 15A. The same reference numerals are given to the same processes as those in FIG. 15A, and the description thereof is omitted.

In step S20 after step S11, the operation control unit 37 determines whether there is an input to the home key 50 or not. If there is no input, the process returns to step S11 to continue waiting for input to the selection key. If there is an input, the process proceeds to step S21.

In step S21, the operation control section 37 determines whether or not cooking is being performed. If the food is not being cooked, the operation control section 37 executes the process of step S12. If the food is being cooked, the operation control section 37 terminates the process. That is, although the depression of the home key 50 is accepted, the operation control unit 37 does not change the display of the display unit 41 to the home screen. In this specification, such processing is expressed as prohibiting transition to the home screen.

Although not shown in FIG. 15B, the operation control unit 37 may change the display contents of the display unit 41 according to the user's input when the cooking is finished.

So far, the operation and display regarding the operation panel 40 and the display section 41 of the induction heating cooker 1 have been described. Configurations other than the operation panel 40 and the display unit 41, for example, configurations of the top surface operation unit and the top surface display unit, are optional, and as shown in FIG. 4, the top plate 5 need not have a home key. rice field.

An application example in which the home key 60 is also provided on the top plate 5 in addition to the configuration and operation described above will be described below.

FIG. 16 shows an example in which a home key 60 is provided near the top surface operation section 20 and the top surface display section 24 on the top plate 5 . The function of home key 60 is the same as that of home key 50 . That is, the operation control unit 37 displays the home screen, which is the screen of the highest layer of the hierarchical menu items, on the top surface display unit 24 . Then, when the top panel operation unit 20 receives an input to one or more selection keys 51 to 57 constituting the top panel operation unit 20, the display of the home screen is switched to the display of the lower hierarchy. Then, when the top surface operation unit 20 receives an input to the home key 60, the operation control unit 37 displays the home screen regardless of the hierarchy of the currently displayed screen. The above processing corresponds to the processing in FIG. 15A. Similarly, the operation control unit 37 may execute the processing corresponding to FIG. 15B as processing using the top surface operation unit 20, the top surface display unit 24, and the home key 60 shown in FIG.

FIG. 17 shows an example of display transition from the home screen of the top surface display section 24 . Level 0 indicates the home screen of the top surface display section 24, as in the example of FIG. 8 and the like. Now, when the third operation unit 55 is pressed, the display on the top surface display unit 24 transitions to "heating", which is the menu for the heating coil 8 corresponding to the top surface display unit 24 . In level 1, the menu items related to heating such as “fried food” and “grilled food” are switched each time the third operation unit 55 is pressed.

When the fourth operation unit 57 is pressed while, for example, "pottery assist" among the menu items related to heating is displayed, the process proceeds to level 2, and the top surface display unit 24 displays the detailed information of "pottery assist." A menu item is displayed. In this example, 10 cooking menu items are selectable in level 2.

When the fourth operation unit 57 is pressed while, for example, "French toast" is displayed among the cooking menu item mocks, the induction heating cooker 1 starts the preheating operation. That is, heating is started.

As in the example of FIG. 8, also in FIG. 17, a dashed line 17a is shown surrounding the display of hierarchy 1 and hierarchy 2. FIG. A dashed line 17a indicates a range in which, when the user presses the home key 60 while the top display section 24 is displaying the content within the dashed line 17a, the display on the top display section 24 transitions to the home screen of hierarchy 0. do. That is, when body operation unit 37 receives an input to home key 60, the home screen is displayed regardless of whether the hierarchy of the currently displayed screen is hierarchy 1 or hierarchy 2. FIG.

On the other hand, when heating is started from floor 2, the display screen of the top surface display section 24 transitions to the display content surrounded by the dashed line 17b. The dashed line 17b indicates that even if the user presses the home key 60 while the top display section 24 is displaying the content within the dashed line 17b, the display on the top display section 24 does not transition to the home screen of hierarchy 0. means In other words, the dashed line 17b prohibits transition to the home screen when the operation control unit 37 receives an input to the home key 60 while the heating control unit 35 is supplying power to the heating coil 8. means that As a result, heating by the heating coil 8 is continued.

As described above, the home key 60 is also provided for the top surface operation unit 20 and the top surface display unit 24, and when the home key 60 is pressed, the current layer is displayed except for a predetermined case such as during heating. The operation control unit 37 may be caused to control to transition to the home screen first.

Although the configuration example in which the home key 60 is provided in the vicinity of the top surface operation unit 20 and the top surface display unit 24 has been described here, other configurations may be adopted. For example, the home key 60 may be provided on the top panel operation section 19 and the top panel display section 23 , or on the top panel operation section 21 and the top panel display section 25 . Alternatively, the home key 60 may be provided for all or any combination of the corresponding top surface operation units and top surface display units.

The embodiment of the induction heating cooker according to the present disclosure has been described above. The processing according to the flowchart described above is realized as the operation of the control unit 31 by a computer program. Such a computer program can be stored in storage unit 33 and executed by control unit 31 .

(3) Aspects As is clear from the above embodiments and modifications, the present disclosure includes the following aspects. In the following, reference numerals are given in parentheses only for the purpose of clarifying correspondence with the above embodiment.

The first aspect is an induction heating cooker (1), comprising a main body (3), heating coils (7, 8 and/or 9) for inductively heating an object to be heated, and heating coils and heating coils on the upper surface of the main body. A mounted top plate (5) and a plurality of keys provided on the side of the main body, including a home key (50) and one or more select keys (61, 63, 65 and/or 67) for user input. A main body operation unit (42, 43 and/or 50) that receives input, a display unit (41) provided on the side, and an operation control unit ( 37). The operation control unit displays, on the display unit, the home screen (FIG. 6B), which is the screen at the highest level of the hierarchical menu items. When the display of the home screen is switched to the display of the lower hierarchy (hierarchy 1 in FIG. 8, etc.) and the main unit operation unit receives an input to the home key, the home screen is displayed regardless of the hierarchy of the currently displayed screen. do.

A second aspect is an induction cooker (1) based on the first aspect. The operation control unit does not display the home screen, and switches to a screen of a lower hierarchy (hierarchies 1 and 2 in FIG. 8, etc.).

A third aspect is an induction cooker (1) based on the second aspect. The operation control unit transitions the contents of the screen displayed on the display unit over a plurality of layers (layer 2 in FIG. 8 and the like).

A fourth aspect is an induction cooker (1) based on the third aspect. When the display unit displays a screen two or more layers away from the home screen, when the body operation unit receives an input to the home key (50), the operation control unit displays the home screen.

A fifth aspect is an induction cooker (1) based on any one of the first to fourth aspects. The display unit has a display device that displays characters and/or graphics in a dot matrix manner.

A sixth aspect is an induction cooker (1) based on any of the first to fifth aspects. The induction heating cooker (1) is a grill (44) provided on the side surface of the main body, and has a grill (44) having a heating part for grilling, and a heating control for controlling heating by the heating coil and the heating part for grilling. and a portion (35). When the operation control unit receives an input to the home key (50) while the heating control unit is supplying power to the grill heating unit, transition to the home screen is prohibited.

A seventh aspect is an induction cooker (1) based on the sixth aspect. The top plate has one or more top surface selection keys, a top surface operation unit for accepting user input with the one or more top surface selection keys, and a top surface having a display area narrower than the display area of the display unit. A display is further provided. The operation control section processes the input received by the top panel operation section and controls display on the top panel display section.

An eighth aspect is an induction cooker (1) based on the seventh aspect. The top panel operation unit further has a top panel home key (60). The operation control unit displays the top surface home screen (FIG. 16), which is the screen of the highest layer of hierarchical menu items, on the top surface display unit, and the top surface operation unit displays one or more top surface selection When an input to a key (51, 53, 55 and/or 57) is accepted, the top surface home screen is switched to a screen of a lower hierarchy (hierarchy 1 in FIG. 17), and the main body operation unit switches to the top surface home key. When the input is received, the top home screen is displayed regardless of the hierarchy of the screen currently displayed on the top home screen.

A ninth aspect is an induction cooker (1) based on the eighth aspect. While the heating control unit is supplying power to the heating coils (7, 8 and/or 9) arranged on the top surface of the main unit, when the main unit operation unit receives an input to the home key for the top surface, Prohibit the transition to the top surface home screen.

A tenth aspect is an induction cooker (1) based on any one of the first to ninth aspects. The main body operation section can be accommodated inside the main body.

An eleventh aspect is a computer program (15A) executed by the operation control section (37) of the induction heating cooker (1). The induction heating cooker comprises a main body (3), heating coils (7, 8 and/or 9) for induction heating an object to be heated, a top plate (5) placed on the upper surface of the main body together with the heating coil, A main body operation unit (42, 43 and 50) is provided on the side of the main body and accepts user input with a plurality of keys including a home key (50) and one or more selection keys (61, 63, 65 and/or 67). ), a display section (41) provided on the side, and an operation control section (37) for processing input received by the main body operation section and controlling display on the display section. The computer program causes the operation control unit to display, on the display unit, a home screen, which is a screen at the highest level of hierarchical menu items, and when the main body operation unit receives an input to one or more selection keys, When the home screen is switched to a screen of a lower hierarchy and the main body operation unit receives an input to the home key, the home screen is displayed regardless of the hierarchy of the currently displayed screen.

The remaining time setting mode for setting the default value of the countdown timer according to the disclosure of the present disclosure is applicable to both domestic and commercial induction heating cookers.

1 heating cooker 3 main body 5 top plate 7, 8, 9 heating coil 11, 12, 13 marker 15, 16, 17 light emitting part 18 temperature sensor 19, 20, 21 top surface operation part 42, 43, 50 main body operation part ( 50 home key)
22 power switch 23, 24, 25 top surface display unit 41 display unit 27 speaker 31 control unit 33 storage unit 35 heating control unit 37 operation control unit 42, 43, 50 main body operation unit 51, 61 first operation unit 53, 63 second 2nd operation part 55, 65 3rd operation part 57, 67 4th operation part 60 home key

Claims (10)

the main body;
a heating coil that induction-heats an object to be heated;
a top plate mounted on the upper surface of the main body together with the heating coil;
a main body operation unit provided on the side surface of the main body for accepting user input with a plurality of keys including a home key and one or more selection keys;
a display unit provided on the side surface;
an operation control unit that processes the input received by the main body operation unit and controls display on the display unit ;
a grill provided on the side surface of the main body, the grill having a grill heating part;
a heating control unit that controls heating by the heating coil and the grill heating unit;
with
The operation control unit is
displaying, on the display unit, a home screen, which is a screen of the highest hierarchical level of hierarchical menu items;
when the main body operation unit receives an input to the one or more selection keys, switching the display of the home screen to a display of a lower hierarchy;
when the main body operation unit receives an input to the home key, the home screen is displayed regardless of the hierarchy of the currently displayed screen;
When the operation control unit receives an input to the home key while the heating control unit is supplying power to the grill heating unit, the automatic heating menu is selected or the manual heating menu is selected. An induction cooker that prohibits transition to the home screen regardless of whether is selected . 2. The induction heating cooker according to claim 1, wherein said operation control unit does not display said home screen and switches to said lower layer screen. 3. The induction heating cooker according to claim 2, wherein said operation control unit transitions the content of a screen displayed on said display unit over a plurality of hierarchies. When the main body operation unit receives an input to the home key when the display unit displays a screen two or more layers away from the home screen, the operation control unit displays the home screen. The induction heating cooker according to claim 3. 5. The induction heating cooker according to any one of claims 1 to 4, wherein said display unit has a display device that displays characters and/or graphics in a dot matrix system. The top plate is
A top surface operation unit having one or more top surface selection keys and receiving input from the user using the one or more top surface selection keys; and a top surface display having a display area narrower than the display area of the display unit. further comprising
The induction heating cooker according to claim 1 , wherein the operation control unit processes an input received by the top surface operation unit and controls display on the top surface display unit. The top surface operation unit further has a top surface home key,
The operation control unit is
displaying, on the top surface display unit, a top surface home screen which is a screen of the highest level of hierarchical menu items;
When the top panel operation unit receives an input to the one or more top panel selection keys, the top panel home screen is switched to a screen of a lower hierarchy,
7. The apparatus according to claim 6 , wherein when said main body operation unit receives an input to said top-surface home key, said top-surface home screen is displayed regardless of the hierarchy of the screen currently displayed on said top-surface home screen. induction cooker. When the main body operation unit receives an input to the top surface home key while the heating control unit is supplying power to the heating coil arranged on the top surface of the main unit, the top surface home The induction heating cooker according to claim 7 , wherein the transition to the screen is prohibited. The induction heating cooker according to any one of claims 1 to 8 , wherein said main body operation portion can be accommodated inside said main body. A computer program executed by an operation control unit of an induction heating cooker,
The induction heating cooker is
the main body;
a heating coil that induction-heats an object to be heated;
a top plate mounted on the upper surface of the main body together with the heating coil;
a main body operation unit provided on the side surface of the main body for accepting user input with a plurality of keys including a home key and one or more selection keys;
a display unit provided on the side surface;
an operation control unit that processes the input received by the main body operation unit and controls display on the display unit ;
a grill provided on the side surface of the main body, the grill having a grill heating part;
a heating control unit that controls heating by the heating coil and the grill heating unit;
with
The computer program causes the operation control unit to:
causing the display unit to display a home screen, which is a screen of the highest hierarchical level of hierarchical menu items;
switching the home screen to a lower hierarchical screen when the main body operation unit receives an input to the one or more selection keys;
when the main body operation unit receives an input to the home key, displaying the home screen regardless of the hierarchy of the currently displayed screen ;
When an input to the home key is received while power is being supplied to the grill heating unit, regardless of whether the automatic heating menu is selected or the manual heating menu is selected, the A computer program that prohibits transitions to the home screen .

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