Heating cooking system and heating cooker

Abstract

To enable wireless connection due to mutual authentication by matching specific authentication information between a heating cooker and an information terminal even if the heating cooker of a heating cooking system is not provided with a display part.SOLUTION: Specific authentication information (a pass code) to be used for mutual authentication of wireless connection between a heating cooker 10 and an information terminal 50 is stored in advance in a storage part of the heating cooker, and the specific authentication information is written down in a notation part 10s of the heating cooker regardless of the presence / absence of power supply so that a user can visually recognize the specific authentication information. Also, a transmission part transmits a radio signal to start mutual authentication when a prescribed start operation is performed by a user in the heating cooker. On the other hand, the information terminal acquires specific authentication information by an acquisition part 51 through a prescribed input operation by the user based on notation of the notation part after receiving the radio signal. Then, the mutual authentication is succeeded by matching between the specific authentication information stored in advance in the storage part and the specific authentication information acquired by the acquisition part.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a cooking system that wirelessly connects a cooking device that heats food using a heating unit with an information terminal that is compatible with wireless communication with the cooking device, and a cooking device used in the cooking system. [Background technology]

[0002] Gas stoves, which use a burner to burn fuel gas to heat food, are a widely used example of a cooking appliance. It has been proposed to configure a cooking system for such gas stoves that allows wireless connection to a user's smartphone or other information terminal, and that can display information about the operation of the gas stove on the smartphone's display.

[0003] For example, in the cooking system described in Patent Document 1, wireless two-way communication is established between a gas stove and a smartphone. When transmission request information is sent from the smartphone to the gas stove, the gas stove responds by transmitting operating status information to the smartphone, and the operating status information received by the smartphone is displayed on a display unit. According to this cooking system, even in a gas stove that does not have a display unit such as an LCD, the operating status information can be provided to the user using the display unit of the user's smartphone. Bluetooth Low Energy (registered trademark) is a known communication standard used for wireless connection between such gas stoves and smartphones. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-163537 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the cooking system described above, which wirelessly links a gas stove and a smartphone, a passcode (specific authentication information) that is entered into the smartphone during the process of mutual authentication (so-called pairing) of the communication partners must be displayed on the gas stove, which poses a problem in that the passcode cannot be displayed on gas stoves that do not have a display unit. Furthermore, such mutual authentication using a passcode is essential to avoid, for example, erroneous wireless connection between a user's smartphone and a neighbor's gas stove.

[0006] This invention has been made in response to the above-mentioned problems in conventional technology, and aims to provide technology that enables wireless connection between a heating cooker and an information terminal with mutual authentication based on matching of specific authentication information, even if the heating cooker in a heating cooking system does not have a display unit such as an LCD display. [Means for solving the problem]

[0007] In order to solve the above-mentioned problems, the cooking system of the present invention employs the following configuration: <First aspect> In a cooking system in which a cooking device that heats food by a heating unit and an information terminal that supports wireless communication with the cooking device are wirelessly connected, The cooking device includes: a storage unit that stores in advance specific authentication information used for mutual authentication of the wireless connection; a display unit on which the specific authentication information is displayed so as to be visible to a user regardless of whether or not power is being supplied to the cooking appliance; a transmitter that transmits a wireless signal for starting the mutual authentication when a predetermined start operation is performed by a user; Equipped with the information terminal includes an acquisition unit that acquires the specific authentication information through a predetermined input operation by a user based on the indication on the indication unit after receiving the wireless signal from the transmission unit, The mutual authentication is successful when the specific authentication information stored in advance in the storage unit matches the specific authentication information acquired by the acquisition unit. It is characterized by:

[0008] In this first aspect of the cooking system, the user can perform a predetermined input operation based on the notation on the notation unit, and the acquisition unit on the information terminal side can acquire specific authentication information. Therefore, even if the cooking appliance does not have a display unit such as an LCD display that uses power to display information, wireless connection is possible between the cooking appliance and the information terminal with mutual authentication based on matching of the specific authentication information.

[0009] <Second aspect> In the cooking system of the first aspect, The specific authentication information is written in an encrypted state on the writing portion, The information terminal includes a decoding unit that decodes the specific authentication information from the notation in the notation unit. It is characterized by:

[0010] In this second aspect of the heating and cooking system, the specific authentication information is not directly written on the marking section, but is written in an encrypted state, so that the specific authentication information cannot be directly ascertained from the marking section, thereby making it possible to increase the confidentiality of the specific authentication information.

[0011] <Third aspect> In the cooking system of the first or second aspect, The cooking device includes a heating operation unit for a user to operate the heating unit, The start operation is an operation performed on the heating operation unit, and is completed by an operation to stop heating of the heating unit. It is characterized by:

[0012] In the cooking system of the third aspect, by using the heating operation unit, it is possible to perform a predetermined start operation to start the transmission of a wireless signal to start mutual authentication, even if the cooking appliance does not have a dedicated operation unit. Then, when the start operation is completed, heating by the heating unit is stopped, so the user can perform a predetermined input operation based on the notation on the notation unit in a safe state.

[0013] <Fourth aspect> In the cooking system of the first or second aspect, The cooking device includes: A heating operation unit for a user to operate the heating unit; a control unit that controls heating of the heating unit based on an operation on the heating operation unit; Equipped with The start operation includes at least an operation performed on the heating operation unit, and is completed in a state where power is supplied to the cooking appliance, The control unit does not allow the heating unit to perform heating from the time the start operation is performed until the time the mutual authentication process is completed. It is characterized by:

[0014] In the cooking system of the fourth aspect, even if the state of the heating operation unit is in a state instructing the heating unit to heat at the time the start operation is completed, the heating unit is not controlled by the control unit, so the user can perform a predetermined input operation based on the notation on the notation unit in a state in which safety is ensured. Furthermore, even if the heating operation unit is operated separately from the start operation between the time the start operation is performed and the time the mutual authentication process is completed, the heating unit is not heated, so safety can be ensured.

[0015] <Fifth aspect> In the heating and cooking system according to any one of the first to fourth aspects, The cooking device includes a notification unit that notifies the state of the cooking device, The notification unit notifies the user that the mutual authentication process is in progress from the start operation until the mutual authentication process is completed. It is characterized by:

[0016] In the cooking system of the fifth aspect, the user can recognize that mutual authentication processing is in progress by the notification from the notification unit, and therefore can reliably perform input operations for mutual authentication.

[0017] In order to solve the above-mentioned problems, the cooking device of the present invention employs the following configuration: A cooking device for heating food by a heating unit and a cooking system for wirelessly connecting an information terminal compatible with wireless communication with the cooking device, a storage unit that stores in advance specific authentication information used for mutual authentication of the wireless connection; a display unit on which the specific authentication information is displayed so as to be visible to a user regardless of whether or not power is being supplied to the cooking appliance; a transmitter that transmits a wireless signal for starting the mutual authentication when a predetermined start operation is performed by a user; Equipped with the information terminal is provided with an acquisition unit that, after receiving the wireless signal from the transmission unit, acquires the specific authentication information through a predetermined input operation by a user based on the indication on the indication unit, The mutual authentication is successful when the specific authentication information stored in advance in the storage unit matches the specific authentication information acquired by the acquisition unit. It is characterized by:

[0018] According to the heating cooker of the present invention, the user can perform a predetermined input operation based on the notation on the notation unit, and the acquisition unit on the information terminal side can acquire specific authentication information.Therefore, even if the heating cooker does not have a display unit such as an LCD display that uses power to display information, wireless connection with mutual authentication based on matching of the specific authentication information between the heating cooker and the information terminal is possible. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a perspective view showing the configuration of a heat cooking system 1 of the present embodiment. [Figure 2] 2 is an explanatory diagram showing a schematic diagram of a fuel gas supply path in a gas stove 10. FIG. [Figure 3] 10 is a cross-sectional view showing the internal structure and operation of an electromagnetic safety valve 22a and a main valve 23a of a left branch passage 21a. FIG. [Figure 4] 1 is a block diagram for controlling combustion in burners 13a, 13b, and 15a in gas stove 10 and for controlling display on display unit 51 in smartphone 50. FIG. [Figure 5] 10 is a flowchart showing a pairing start process executed by the controller 40 of the gas stove 10 to start pairing for wireless connection with the smartphone 50. [Figure 6] 10 is a sequence diagram showing an example of pairing between the gas stove 10 and the smartphone 50. FIG. [Figure 7] 10 is an explanatory diagram showing an example in which a passcode is input to the smartphone 50 when pairing the gas stove 10 with the smartphone 50. FIG. [Figure 8] 10 is a flowchart showing a restriction process during pairing executed by the controller 40 of the gas stove 10 of the modified example. DETAILED DESCRIPTION OF THE INVENTION

[0020] 1 is a perspective view showing the configuration of a cooking system 1 of this embodiment. The cooking system 1 shown in the figure is composed of a gas stove 10 as an example of a cooking appliance that heats food to be cooked, and a smartphone 50 as an example of an information terminal that supports wireless communication with the gas stove 10, and the gas stove 10 and the smartphone 50 can be linked via a wireless connection.

[0021] The illustrated gas stove 10 is a tabletop stove that is placed on a kitchen stovetop and includes a box-shaped stove body 11 with an open top and a top plate 12 that is installed to cover the top surface of the stove body 11. A stove burner 13 that burns a mixture of fuel gas and air is installed inside the stove body 11, and the top of the stove burner 13 protrudes from an insertion hole formed in the top plate 12. In the illustrated example, two stove burners 13a and 13b are arranged on the left and right.

[0022] Trivets 14a, 14b are installed on the top plate 12, surrounding the burners 13a, 13b, for placing cooking containers such as pots for holding ingredients (foods to be cooked) above the burners. A sticker 10s bearing a two-dimensional code is attached to the top surface of the top plate 12 (in the left corner of the front side in the illustrated example). As will be described in detail later, this two-dimensional code contains passcode information used in a process for mutual authentication of the wireless connection between the gas stove 10 and the smartphone 50 (so-called pairing). The wireless connection between the gas stove 10 and the smartphone 50 allows, for example, operational information regarding the operation of the gas stove 10 to be displayed on a display unit 51, such as a liquid crystal display, of the smartphone 50. The passcode in this embodiment corresponds to the "specific authentication information" of the present invention. The sticker 10s in this embodiment corresponds to the "notation unit" of the present invention.

[0023] Additionally, the stove body 11 incorporates a grill 15 (not shown) for grilling food (food to be cooked), and is equipped with a grill burner 15a that burns a mixture of fuel gas and air as its heat source. A grill door 15d is provided on the front of the stove body 11, allowing the front of the grill 15 to be opened and closed. On the left and right sides of the grill door 15d are provided two burners 13a, 13b and the grill burner 15a, respectively. These burners are operated by the user to ignite and extinguish the flames, and the flame control levers 17a, 17b, and 17g are operated to adjust the flame power. The burners 13a, 13b and the grill burner 15a in this embodiment correspond to the "heating unit" of the present invention, and the burner buttons 16a, 16b, and 16g in this embodiment correspond to the "heating operation unit" of the present invention.

[0024] As will be described in more detail later, the user presses the ignition / extinction buttons 16a, 16b, and 16g in this embodiment toward the rear. By pressing the buttons from their initial positions projecting toward the front to their full-extinction positions toward the rear, the corresponding burners 13a, 13b, and 15a are ignited. When the user releases the buttons (releases his / her hand), the ignition / extinction buttons 16a, 16b, and 16g are held in an intermediate position between their full-extinction positions and their initial positions, and combustion in the corresponding burners 13a, 13b, and 15a continues. When the buttons are then pressed toward the rear again and released, the ignition / extinction buttons 16a, 16b, and 16g return to their initial positions, and the corresponding burners 13a, 13b, and 15a are extinguished. The user can also slide the flame control levers 17a, 17b, and 17g left and right to change the flame power of the corresponding burners 13a, 13b, and 15a.

[0025] A battery case 18 is provided on the front of the stove body 11 to the left of the on / off button 16a on the left side, which holds the dry batteries that power the gas stove 10. An alarm LED 19 is provided above the battery case 18 to notify the status of the gas stove 10. For example, the alarm LED 19 lights up when the dry batteries are nearing replacement time. The alarm LED 19 in this embodiment corresponds to the "alarm unit" of the present invention.

[0026] 2 is an explanatory diagram showing a schematic diagram of the fuel gas supply path in the gas stove 10. The gas stove 10 of this embodiment is equipped with the two stove burners 13a, 13b and the grill burner 15a described above, and correspondingly, the gas passage 20 that supplies the fuel gas is branched into three paths: a left branch path 21a corresponding to the left stove burner 13a, a right branch path 21b corresponding to the right stove burner 13b, and a grill branch path 21g corresponding to the grill burner 15a, and fuel gas is supplied to each of these paths.

[0027] Left branch passage 21a is provided, in this order downstream, with electromagnetic safety valve 22a and main valve 23a, which open and close left branch passage 21a, and flow rate control valve 24a, which adjusts the flow rate of fuel gas in left branch passage 21a. When electromagnetic safety valve 22a and main valve 23a are opened, fuel gas is injected from a nozzle (not shown) at the end of left branch passage 21a at a flow rate corresponding to the opening of flow rate control valve 24a. The mixed gas, mixed with primary air for combustion, is supplied to left stove burner 13a. This mixed gas is ejected from multiple flame ports in left stove burner 13a, and combustion of the mixed gas is initiated by spark discharge from ignition plug 25a, heating the ingredients (food) in the cooking vessel above.

[0028] A thermocouple 26a is provided as a flame detector for detecting the combustion flame in the left stove burner 13a, and it is possible to detect ignition and extinguishing based on the electromotive force of the thermocouple 26a. In addition, a pot bottom temperature sensor 27a is provided that protrudes from the center of the left stove burner 13a and abuts against the bottom surface of the cooking vessel above, making it possible to detect the temperature of the cooking vessel.

[0029] Similarly, right branch passage 21b is provided with electromagnetic safety valve 22b, main valve 23b, and flow control valve 24b, as well as ignition plug 25b, thermocouple 26b, and pot bottom temperature sensor 27b corresponding to right stove burner 13b. Grill branch passage 21g is also provided with electromagnetic safety valve 22g, main valve 23g, and flow control valve 24g. Also, ignition plug 25g and thermocouple 26g corresponding to grill burner 15a are provided, and grill temperature sensor 28 is provided inside grill 15 to detect the temperature inside grill 15.

[0030] In the gas stove 10 of this embodiment, the two stove burners 13a, 13b and the grill burner 15a can be burned independently or simultaneously. As described below, the electromagnetic safety valves 22a, 22b, and 22g and the main valves 23a, 23b, and 23g can be opened and closed by pressing the corresponding on / off buttons 16a, 16b, and 16g. The openings of the flow control valves 24a, 24b, and 24g can be changed in conjunction with the sliding operation of the corresponding flame control levers 17a, 17b, and 17g. The flame power of each burner 13a, 13b, and 15a can be adjusted by adjusting the opening (flow rate of fuel gas) of the corresponding flow control valve 24a, 24b, and 24g.

[0031] 3 is a cross-sectional view showing the internal structure and operation of the electromagnetic safety valve 22a and main valve 23a of the left branch path 21a. Here, the electromagnetic safety valve 22a and main valve 23a of the left branch path 21a will be described as an example, but the same is basically true for the electromagnetic safety valve 22b and main valve 23b of the right branch path 21b and the electromagnetic safety valve 22g and main valve 23g of the grill branch path 21g. First, FIG. 3(a) shows the initial position before the user presses the on / off button 16a, with both the electromagnetic safety valve 22a and main valve 23a closed.

[0032] As shown in the figure, the electromagnetic safety valve 22a includes a valve seat 31 having a valve hole 30 that connects the upstream side and downstream side of the left branch passage 21a, and a valve element 32 that abuts against the valve seat 31 from the upstream side (the left side in the figure) to close the valve hole 30. The valve element 32 is fixed to a movable shaft of a solenoid 34 and is urged by a biasing spring 33 in a direction toward abutting against the valve seat 31; in FIG. 3(a), the valve element 32 is abutting against the valve seat 31. Although the solenoid 34 cannot separate the valve element 32 from the valve seat 31 when energized, it can use electromagnetic force to hold the valve element 32 that has been separated from the valve seat 31 by an external force, as described below.

[0033] The main valve 23a, which is provided downstream of the electromagnetic safety valve 22a in the left branch passage 21a (on the right side in the figure), is similarly provided with a valve seat 36 having a valve hole 35 that connects the upstream and downstream sides of the left branch passage 21a, and a valve element 37 that abuts against the valve seat 36 from the upstream side to close the valve hole 35. The valve element 37 is biased by a biasing spring 38 in the direction of abutting against the valve seat 36, and in Figure 3(a), the valve element 37 is abutting against the valve seat 36. In addition, a rod 39 is provided slidably through the valve hole 35 to transmit the operation of the ignition / extinguishing button 16a from the downstream side of the main valve 23a to the valve element 37, and the valve element 37 is fixed to the rod 39. This rod 39 can slide along the same axis as the movable axis of the solenoid 34 of the electromagnetic safety valve 22a, and as described below, can also transmit the operation of the ignition / extinction button 16a to the valve body 32 of the electromagnetic safety valve 22a.

[0034] When the user presses the ignition / extinction button 16a toward the back (left side in the figure) to ignite the left stove burner 13a, the movement of the ignition / extinction button 16a is transmitted to the rod 39, which is pushed upstream against the biasing force of the biasing spring 38. As a result, the valve body 37 fixed to the rod 39 is pulled away from the valve seat 36, and the main valve 23a opens as shown in Figure 3(b).

[0035] FIG. 3(b) shows the ignition / extinction button 16a pressed to an intermediate position just before the fully depressed position. In the gas stove 10 of this embodiment, the ignition / extinction button 16a is equipped with a microswitch (not shown) that enables detection of the operating position. This microswitch has two contacts (first and second contacts), and in the initial position of the ignition / extinction button 16a, both contacts are OFF. When the ignition / extinction button 16a is pressed to the intermediate position and the first contact of the microswitch is ON, current is passed through the solenoid 34 of the electromagnetic safety valve 22a. However, when the ignition / extinction button 16a is in the intermediate position, the rod 39 is not yet in contact with the valve body 32 of the electromagnetic safety valve 22a, and the operation of the ignition / extinction button 16a is not transmitted to the valve body 32, so the electromagnetic safety valve 22a remains closed.

[0036] Next, when the user further presses the ignition / extinction button 16a, the tip of the rod 39 pushed upstream comes into contact with the valve element 32 of the electromagnetic safety valve 22a, pulling the valve element 32 away from the valve seat 31 against the biasing force of the biasing spring 33, and the electromagnetic safety valve 22a opens as shown in Figure 3(c). As a result, fuel gas is supplied to the left stove burner 13a.

[0037] Figure 3(c) shows the state in which the ignition / extinction button 16a is pressed all the way to the full depression position. In the gas stove 10 of this embodiment, when the ignition / extinction button 16a is pressed all the way to the full depression position and the second contact of the microswitch is turned on, a spark discharge is initiated by the ignition plug 25a. This initiates combustion of the mixture of fuel gas and air supplied to the left burner 13a. This spark discharge by the ignition plug 25a continues, along with the energization of the solenoid 34, until a predetermined determination time has elapsed, during which ignition is determined based on the electromotive force of the thermocouple 26a.

[0038] Next, when the user releases the ignition / extinction button 16a, the ignition / extinction button 16a is temporarily held in an intermediate position between the fully depressed position and the initial position, as described above. Accordingly, the rod 39 is pushed downstream (to the right in the figure) by the biasing force of the biasing spring 38 and no longer abuts against the valve element 32 of the electromagnetic safety valve 22a. However, as shown in Figure 3(b), the valve element 37 fixed to the rod 39 does not abut against the valve seat 36, and the main valve 23a remains open. If ignition of the left burner 13a is not detected based on the electromotive force of the thermocouple 26a by the time the determination time has elapsed, the solenoid 34 is de-energized. The biasing force of the biasing spring 33 causes the valve element 32 to abut against the valve seat 31, closing the electromagnetic safety valve 22a and shutting off the supply of fuel gas to the left burner 13a.

[0039] On the other hand, if ignition of the left stove burner 13a is detected based on the electromotive force of the thermocouple 26a before the judgment time has elapsed, the solenoid 34 continues to be energized until extinguishing is detected, so that the electromagnetic force keeps the valve element 32 separated from the valve seat 31. In this way, the electromagnetic safety valve 22a is maintained in an open state, and combustion in the left stove burner 13a continues.

[0040] When the user then presses and releases the ignition / extinguishing button 16a again, the ignition / extinguishing button 16a returns to its initial position, and the urging force of the urging spring 38 pushes the rod 39 back downstream, causing the valve body 37 to abut against the valve seat 36, and the main valve 23a returns to its closed state as shown in Figure 3(a). Also, when the ignition / extinguishing button 16a returns to its initial position and the first and second contacts of the microswitch are turned off, the supply of electricity to the solenoid 34 is stopped, and the urging force of the urging spring 33 causes the valve body 32 to abut against the valve seat 31, and the electromagnetic safety valve 22a also returns to its closed state.

[0041] 4 is a block diagram for controlling combustion in burners 13a, 13b, and 15a of gas stove 10 and controlling display on display unit 51 of smartphone 50. First, gas stove 10 is equipped with controller 40 that controls the entire gas stove 10, and controller 40 is electrically connected to on / off buttons 16a, 16b, and 16g corresponding to two stove burners 13a and 13b and grill burner 15a, respectively, electromagnetic safety valves 22a, 22b, and 22g, ignition plugs 25a, 25b, and 25g, thermocouples 26a, 26b, and 26g, temperature sensors 27a, 27b, and 28, and the like.

[0042] When one of the ignition / extinction buttons 16a, 16b, or 16g is pressed to an intermediate position, the first contact of the microswitch is turned on, and the controller 40 starts energizing the solenoid 34 of the corresponding electromagnetic safety valve 22a, 22b, or 22g. When the ignition / extinction button 16a, 16b, or 16g is further pressed to the fully depressed position, the second contact of the microswitch is turned on, and spark discharge by the ignition plug 25a, 25b, or 25g begins. This continues until a predetermined time has elapsed. When the ignition / extinction button 16a, 16b, or 16g is pressed again from the intermediate position and returns to its initial position, the first and second contacts of the microswitch are turned off, and the solenoid 34 of the corresponding electromagnetic safety valve 22a, 22b, or 22g is de-energized. The controller 40 in this embodiment corresponds to the "controller" of the present invention.

[0043] In addition, if the controller 40 does not detect ignition (detects extinction) based on the electromotive force of the corresponding thermocouple 26a, 26b, 26g even though any of the ignition / extinction buttons 16a, 16b, 16g is held in the intermediate position, it determines that an abnormality has occurred, that is, an ignition error, or that the fire has gone out during combustion (flame-out error), and stops the supply of electricity to the solenoid 34 of the corresponding electromagnetic safety valve 22a, 22b, 22g. Also, if the temperature detected by any of the temperature sensors 27a, 27b, 28 exceeds a specified temperature, the controller 40 determines that an abnormality has occurred, that is, the temperature has become too high (high temperature error), and stops the supply of electricity to the solenoid 34 of the corresponding electromagnetic safety valve 22a, 22b, 22g.

[0044] Furthermore, to support wireless communication with the smartphone 50, the controller 40 is connected to a transmitter 41 capable of transmitting wireless signals and a receiver 42 capable of receiving wireless signals, as well as a memory 43 that stores information such as a passcode used for mutual authentication of the wireless connection. The cooking system 1 of this embodiment employs Bluetooth Low Energy (registered trademark) as the communication standard for wireless connection between the gas stove 10 and the smartphone 50.

[0045] Meanwhile, smartphone 50 includes, in addition to display unit 51 such as the aforementioned liquid crystal display, transmitter 52 capable of transmitting wireless signals and receiver 53 capable of receiving wireless signals to support wireless communication with gas stove 10. Smartphone 50 also includes memory unit 54 that stores an application program for linking with gas stove 10 (hereinafter referred to as the "cooker linking app"), and display control unit 55 that controls linking with gas stove 10 in accordance with the cooker linking app. Display unit 51, transmitter 52, receiver 53, and memory unit 54 are connected to display control unit 55. Furthermore, camera 56 mounted on smartphone 50 is connected to display control unit 55. These units are conceptually classified based on their functions, and do not necessarily need to be physically present. They can be configured using various devices, electronic components, integrated circuits, computers, or combinations thereof.

[0046] The display unit 51 of this embodiment is equipped with a touch panel, and in response to a stove-linked app activated by a user through a predetermined input (e.g., tapping an icon), the display control unit 55 wirelessly connects to the gas stove 10 and can display operating information related to the operation of the gas stove 10 (e.g., whether each burner 13a, 13b, 15a is burning or stopped, whether an error has occurred, the details of the error, etc.) on the display unit 51. In addition, by reading the two-dimensional code on the sticker 10s affixed to the top plate 12 of the gas stove 10 with the camera 56, a passcode is displayed on the display unit 51, as described below. The display control unit 55 and camera 56 of this embodiment have a function corresponding to the "decryption unit" of the present invention.

[0047] 5 is a flowchart showing the pairing start process that the controller 40 of the gas stove 10 executes to start pairing for a wireless connection with the smartphone 50. The gas stove 10 of this embodiment does not have a dedicated operation unit that the user operates when starting pairing, and instead uses the existing on / off buttons 16a, 16b, and 16g to perform a predetermined start operation.

[0048] As shown in the figure, the pairing start process first determines whether the right fire extinguishing button 16b has been turned ON (STEP 1). As described above, the operating positions of the fire extinguishing buttons 16a, 16b, and 16g can be detected based on the two contacts of the microswitch. Here, the initial position is determined as the OFF state, and the intermediate position is determined as the ON state. If the right fire extinguishing button 16b is not turned ON (STEP 1: no), the user has not yet initiated pairing, so the process returns to the beginning of the pairing start process and repeats the determination in STEP 1. Note that if the left fire extinguishing button 16a or the grill fire extinguishing button 16g is turned ON before the right fire extinguishing button 16b is turned ON, this is not a pairing start operation, so the pairing start process is not executed, and normal ignition and combustion operation is performed.

[0049] On the other hand, if the right-side fire extinguishing button 16b is turned on (STEP 1: yes), the time elapsed since the right-side fire extinguishing button 16b was turned on is measured to determine whether five seconds have elapsed (STEP 2). If five seconds have not yet elapsed (STEP 2: no), the process next determines whether the left-side fire extinguishing button 16a and the grill-side fire extinguishing button 16g are turned on (STEP 3). If the left-side fire extinguishing button 16a and the grill-side fire extinguishing button 16g are not turned on (STEP 3: no), the process returns to STEP 2 and checks the time elapsed since the right-side fire extinguishing button 16b was turned on. If five seconds have elapsed without the left-side fire extinguishing button 16a and the grill-side fire extinguishing button 16g being turned on (STEP 2: yes), it is determined that this is not a pairing start operation, and the pairing start process of FIG. 5 is terminated, and normal ignition and combustion operation is performed. Thereafter, when all of the on / off buttons 16a, 16b, and 16g are turned off and then the right on / off button 16b is turned on again, the pairing start process of FIG. 5 is executed again.

[0050] On the other hand, if the left fire extinguishing button 16a and the grill fire extinguishing button 16g are turned ON before five seconds have elapsed since the right fire extinguishing button 16b was turned ON (STEP 3: yes), the time elapsed since the left fire extinguishing button 16a and the grill fire extinguishing button 16g were turned ON is measured to determine whether five seconds have elapsed (STEP 4). If five seconds have not yet elapsed (STEP 4: no), it is next determined whether all of the fire extinguishing buttons 16a, 16b, and 16g are turned OFF (STEP 5). If any of the fire extinguishing buttons 16a, 16b, and 16g are not turned OFF (STEP 5: no), the process returns to STEP 4 and the time elapsed since the left fire extinguishing button 16a and the grill fire extinguishing button 16g were turned ON is confirmed. If five seconds have passed without any of the ignition / extinction buttons 16a, 16b, and 16g being turned OFF (STEP 4: yes), it is determined that this is not a pairing start operation, and the pairing start process of Fig. 5 is terminated, and normal ignition / combustion operation is performed. After that, if the right ignition / extinction button 16b is turned ON again after all of the ignition / extinction buttons 16a, 16b, and 16g are turned OFF, the pairing start process of Fig. 5 is performed again.

[0051] On the other hand, if all of the on / off buttons 16a, 16b, and 16g are turned off before five seconds have elapsed since the left on / off button 16a and the grill on / off button 16g were turned on (STEP 5: yes), it is determined that the pairing initiation operation has been completed, and the transmitter 41 starts transmitting an advertising signal for pairing (STEP 7). This advertising signal is a one-way broadcast wireless signal transmitted to an unspecified number of parties, and includes information such as the model of the gas stove 10. Furthermore, the advertising signal is not transmitted just once, but is transmitted repeatedly at predetermined intervals (for example, every 100 ms).

[0052] Once the transmission of the advertising signal has started in this way, it is determined whether or not a connection request has been received from smartphone 50 (STEP 7). When smartphone 50 receives the advertising signal at receiver 53 while the stove linking app is running, smartphone 50 recognizes the presence of connectable gas stove 10, and displays a guide about pairing on display 51, as described below. Then, when the user performs a predetermined request operation on smartphone 50 to request pairing (for example, tapping the pairing button), a connection request is transmitted from transmitter 52.

[0053] If a connection request has not been received from the smartphone 50 (STEP 7: no), it is then determined whether 120 seconds have passed since the start of transmission of the advertising signal (STEP 8). If 120 seconds have not yet passed (STEP 8: no), the process returns to STEP 7 and checks whether a connection request has been received from the smartphone 50.

[0054] If a connection request is received from the smartphone 50 before 120 seconds have elapsed since the start of transmission of the advertising signal (STEP 7: yes), the sending of the advertising signal is stopped (STEP 9), the pairing start process of Figure 5 is terminated, and the process proceeds to the connection establishment process in which a one-to-one connection with the smartphone 50 is established and authentication is performed using a passcode, as described below.

[0055] On the other hand, if 120 seconds have passed since the start of transmission of the advertising signal without receiving a connection request from the smartphone 50 (STEP 8: yes), it is determined that pairing with the smartphone 50 will not be performed, and after stopping transmission of the advertising signal (STEP 10), the pairing start process of Fig. 5 is terminated. Since transmission of the advertising signal consumes power, the gas stove 10 can reduce its power (battery) consumption by stopping the transmission of the advertising signal after a predetermined time (120 seconds in this embodiment) rather than continuing to transmit it indefinitely. After that, when the right-side extinguishing button 16b is turned ON again, the gas stove 10 executes the pairing start process of Fig. 5 again.

[0056] Fig. 6 is a sequence diagram showing an example of pairing between the gas stove 10 and the smartphone 50. In Fig. 6, the left side shows the processing on the gas stove 10, and the right side shows the processing on the smartphone 50. First, on the smartphone 50 side, a stove linking app is launched in response to a predetermined input (tapping an icon) by the user, and a dedicated app screen is displayed on the display unit 51 in accordance with the stove linking app, and the receiver unit 53 enters a scanning state in which it can receive an advertising signal. The app screen of this embodiment displays a warning that when pairing with the gas stove 10 is started, the gas valve (not shown) of the gas pipe that supplies fuel gas to the gas stove 10 should be closed.

[0057] Meanwhile, on the gas stove 10 side, when the user performs a combined operation on the on / off buttons 16a, 16b, and 16g described above as an operation to start pairing, the transmitter 41 starts transmitting an advertising signal for pairing. Such an operation to start pairing is described in the instruction manual for the gas stove 10, which also describes turning off the gas valve before performing the operation to start. The operation to start pairing may be displayed on the app screen of the display 51 of the smartphone 50 that has launched the stove linkage app. As described above, the advertising signal is transmitted one-way to an unspecified number of parties using a broadcast method, and is repeatedly transmitted at predetermined intervals (100 ms in this embodiment).

[0058] The smartphone 50 receives this advertising signal at the receiver 53 and displays a guide about pairing on the application screen of the display 51. The advertising signal of this embodiment includes information about the model of the gas stove 10, and displays on the application screen of the display 51 the position where the above-mentioned sticker 10s is affixed (see FIG. 1) according to the model of the gas stove 10, and information such as how to read the two-dimensional code written on the sticker 10s with the camera 56. As described above, the two-dimensional code written on the sticker 10s includes passcode information.

[0059] Then, when the user follows the instructions displayed on the app screen of the display unit 51 of the smartphone 50 and performs an operation to read the two-dimensional code on the sticker 10s attached to the top plate 12 of the gas stove 10 with the camera 56 of the smartphone 50, the passcode decoded from the two-dimensional code is displayed on the display unit 51. The timing for reading the two-dimensional code with the camera 56 may be before receiving the advertising signal, but if it is after receiving the advertising signal, the camera 56 may be activated in conjunction with receiving the advertising signal. Also, information on an encryption key for decrypting the passcode from the two-dimensional code may be included in the advertising signal so that the passcode cannot be decrypted unless the advertising signal is received.

[0060] Next, on the smartphone 50 side, when the user taps the pairing button displayed on the application screen of the display unit 51 as a pairing request operation, a connection request is transmitted from the transmission unit 52. When this connection request is received by the reception unit 42 on the gas stove 10 side, the transmission of the advertising signal from the transmission unit 41 is stopped, and a one-to-one connection is established between the gas stove 10 and the smartphone 50, and authentication is initiated.

[0061] The smartphone 50 then displays a passcode input field on the app screen of the display unit 51 and acquires the passcode entered by the user. If the acquired passcode matches the passcode pre-stored in the memory unit 43 of the gas stove 10, authentication is successful, and the gas stove 10 and smartphone 50 exchange encryption information, completing pairing. Thereafter, wireless two-way communication between the gas stove 10 and smartphone 50 is encrypted based on the encryption information. The display unit 51 and display control unit 55 of the smartphone 50 in this embodiment have a function equivalent to the "acquisition unit" of the present invention.

[0062] FIG. 7 is an explanatory diagram showing an example of inputting a passcode into the smartphone 50 when pairing the gas stove 10 with the smartphone 50. First, FIG. 7(a) shows an example of confirming a passcode. The gas stove 10 of this embodiment does not have a display unit such as an LCD display capable of displaying a passcode. Instead, as described above, a sticker 10s bearing a two-dimensional code containing passcode information is affixed to the top panel 12. By reading this two-dimensional code with the camera 56 of the smartphone 50, the passcode decoded from the two-dimensional code is displayed on the display unit 51. In the illustrated example, a six-digit number is displayed on the display unit 51 as the passcode. The user confirms this six-digit number and memorizes or writes it down. The same six-digit number is pre-stored in the memory unit 43 of the gas stove 10.

[0063] 7(b), when a passcode input field is displayed on the display unit 51 of the smartphone 50, the user taps the numeric keypad to input the six-digit number confirmed earlier. Note that, in the smartphone 50 of this embodiment, the passcode is acquired through input by the user (tapping the numeric keypad), but the passcode may be acquired directly by reading and decrypting the two-dimensional code with the camera 56 without input by the user.

[0064] As described above, in the cooking system 1 of this embodiment, a sticker 10s bearing a two-dimensional code containing passcode information is affixed to the top plate 12. When the two-dimensional code is read by the camera 56 of the smartphone 50, the passcode decoded from the two-dimensional code is displayed on the display unit 51 of the smartphone 50. When the user performs a predetermined start operation using the on / off buttons 16a, 16b, and 16g of the gas stove 10, an advertising signal for pairing is transmitted from the transmitter 41. When the advertising signal is received by the receiver 53 of the smartphone 50, a passcode input field is displayed on the app screen of the display unit 51, and the passcode entered by the user is acquired. If the passcode acquired by the smartphone 50 matches the passcode previously stored in the memory unit 43 of the gas stove 10, authentication is successful.

[0065] According to the cooking system 1 of this embodiment, the user can confirm the passcode by reading the two-dimensional code on the sticker 10s attached to the top plate 12 of the gas stove 10 with the camera 56 of the smartphone 50, and the passcode can be obtained on the smartphone 50 side by inputting it by the user. Therefore, even if the gas stove 10 does not have a display unit such as a liquid crystal display that uses power to display information, a wireless connection accompanied by mutual authentication based on matching passcodes is possible between the gas stove 10 and the smartphone 50. By performing mutual authentication using passcodes, it is possible to avoid, for example, an erroneous wireless connection between the user's smartphone 50 and a neighboring gas stove 10.

[0066] In particular, in the cooking system 1 of this embodiment, the passcode is not directly written on the sticker 10s attached to the top plate 12 of the gas stove 10, but rather a two-dimensional code containing passcode information, and when the two-dimensional code is read by the camera 56 of the smartphone 50, the decoded passcode is displayed on the display unit 51. In this way, the passcode cannot be directly ascertained from the sticker 10s on the top plate 12, which makes it possible to enhance the confidentiality of the passcode.

[0067] In addition, in the cooking system 1 of this embodiment, when a user performs a predetermined start operation on the ignition / extinction buttons 16a, 16b, and 16g of the gas stove 10, transmission of an advertising signal from the transmitter 41 begins. This start operation is completed by turning all of the ignition / extinction buttons 16a, 16b, and 16g OFF. In this way, by using the existing ignition / extinction buttons 16a, 16b, and 16g, it is possible to perform the start operation for starting transmission of the advertising signal even if the gas stove 10 does not have a dedicated operation unit. Even if the user performs the start operation with the gas valve open, when the start operation is completed, all of the ignition / extinction buttons 16a, 16b, and 16g are OFF and combustion in each burner 13a, 13b, and 15a has stopped, so the user can perform the pairing operation on the smartphone 50 while ensuring safety.

[0068] In this embodiment, the pairing start operation on the gas stove 10 is performed by performing a combined operation on the three ignition / extinction buttons 16a, 16b, and 16g. However, the pairing start operation on the gas stove 10 is not limited to a combined operation and may be a continuous operation on any one of the ignition / extinction buttons 16a, 16b, and 16g. For example, the right ignition / extinction button 16b may be pressed three times in succession within 10 seconds to switch between the ON and OFF states. Furthermore, the operation target for the pairing start operation is not limited to the ignition / extinction buttons 16a, 16b, and 16g, but may be any existing operation unit. For example, if the gas stove 10 has a temperature control function and is equipped with a setting button for setting the temperature, the start operation may be a long press of the setting button (e.g., holding the button pressed for 5 seconds or more), or, if there are multiple setting buttons, a simultaneous press of multiple setting buttons.

[0069] The cooking system 1 of the present embodiment described above also has the following variations. The following describes the variations, focusing on the differences from the embodiment described above. In the description of the variations, the same components as those in the embodiment described above are given the same reference numerals and will not be described again.

[0070] In the above-described embodiment, the operation to start pairing on the gas stove 10 is completed by turning all of the ignition / extinction buttons 16a, 16b, and 16g to the OFF state. In contrast, in the modified example, the operation to start pairing on the gas stove 10 is performed by pressing and holding the left ignition / extinction button 16a to the full depressed position for five seconds or more. During the long press, the rod 39 is pressed down, opening both the main valve 23a and the electromagnetic safety valve 22a (see FIG. 3(c)), and spark discharge occurs through the ignition plug 25a, starting combustion of the mixed gas in the left stove burner 13a. When the user releases the left-side extinguishing button 16a after holding it down, the left-side extinguishing button 16a remains in the intermediate position (ON state). If ignition of the left burner 13a is detected based on the electromotive force of the thermocouple 26a, the solenoid 34 remains energized until extinguishing is detected. This keeps the electromagnetic safety valve 22a open, allowing combustion in the left burner 13a to continue. Therefore, even if the user performs a start operation with the gas valve open, combustion in the left burner 13a will continue once the start operation is complete. Therefore, in the modified cooking system 1, even if the user performs a start operation with the gas valve open, the controller 40 of the gas stove 10 executes the following pairing restriction process to prevent (stop) combustion in each burner 13a, 13b, and 15a from continuing until pairing is complete.

[0071] 8 is a flowchart showing the pairing restriction process executed by the controller 40 of the gas stove 10 of the modified example. As shown in the figure, when the pairing restriction process starts, it is first determined whether the pairing flag is ON (STEP 20). The pairing flag is a flag indicating that pairing is in progress, which has been started based on a pairing start operation, and a storage area for the pairing flag is reserved in the storage unit 43.

[0072] If the pairing in progress flag is OFF (STEP 20: no), the process next determines whether a pairing start operation has been detected (STEP 21: no). The pairing start operation in the modified gas stove 10 is set to a long press of the left-side extinguishing button 16a, and the process determines whether the left-side extinguishing button 16a is pressed all the way to the full depression position, turning on the second contact of the microswitch, and this state is maintained for 5 seconds or more. If a long press of the left-side extinguishing button 16a is not detected (STEP 21: no), pairing is not initiated, and the process returns to STEP 20.

[0073] On the other hand, if a long press of the left-side fire-off button 16a is detected as the operation to start pairing, the pairing in progress flag is turned ON (STEP 22). In addition, in response to the pairing in progress flag being turned ON, the notification LED 19 is made to flash (STEP 23). As described above, the notification LED 19 is provided on the front of the stove body 11, and while it lights up when the time to replace the dry batteries is approaching, it flashes during pairing to notify the user that pairing is in progress.

[0074] In this way, the pairing in progress flag is turned ON, or if the pairing in progress flag is already ON in the determination of STEP 20 (STEP 20: yes), it is next determined whether any of the on / off buttons 16a, 16b, and 16g is in the ON state (STEP 24). After the left on / off button 16a is pressed and held to initiate pairing, as described above, the left on / off button 16a is held in the ON state (middle position). However, it is determined whether not only the left on / off button 16a but also the right on / off button 16b and the grill on / off button 16g are in the ON state.

[0075] If any of the on / off buttons 16a, 16b, and 16g is in the ON state (STEP 24: yes), it is determined whether the solenoid 34 of the electromagnetic safety valve 22a, 22b, and 22g corresponding to that on-state on / off button 16a, 16b, and 16g is energized (STEP 25). As described above, the electromagnetic safety valves 22a, 22b, and 22g whose solenoid 34 is energized are maintained in an open state by electromagnetic force.

[0076] If the solenoids 34 of the electromagnetic safety valves 22a, 22b, and 22g corresponding to the ON-state ignition / extinguishing buttons 16a, 16b, and 16g are energized (step 25: yes), the solenoids 34 of the energized electromagnetic safety valves 22a, 22b, and 22g are stopped (step 26). As a result, the electromagnetic safety valves 22a, 22b, and 22g, which were in the open state, are returned to the closed state.

[0077] On the other hand, if none of the ignition / extinction buttons 16a, 16b, 16g are in the ON state (step 24: no), or if current is not being applied to the solenoids 34 of the electromagnetic safety valves 22a, 22b, 22g corresponding to the ON ignition / extinction buttons 16a, 16b, 16g (step 25: no), the process of step 26 is omitted. Note that while the pairing in progress flag is ON, the solenoids 34 of the electromagnetic safety valves 22a, 22b, 22g may be uniformly prohibited from being applied with current, regardless of the state of the ignition / extinction buttons 16a, 16b, 16g.

[0078] Thereafter, it is determined whether or not pairing has been completed (STEP 27). As described above, if the passcode acquired by smartphone 50 through user input matches the passcode previously stored in storage unit 43 of gas stove 10, authentication is successful, and pairing is completed when encrypted information is exchanged between gas stove 10 and smartphone 50.

[0079] If pairing is not yet complete (STEP 27: no), it is then determined whether pairing has been canceled (STEP 28). For example, if 120 seconds have passed without receiving a connection request from smartphone 50 after the transmission of an advertising signal has started based on the pairing start operation, or if the passcodes do not match and authentication fails, it is determined that pairing has been canceled. If pairing has not been canceled (STEP 28: no), the pairing in progress flag remains ON and the process returns to STEP 20.

[0080] On the other hand, if pairing is completed (STEP 27: yes) or if pairing is canceled (STEP 28: yes), the pairing in progress flag is turned OFF (STEP 29). In addition, when the pairing in progress flag is turned OFF, the notification LED 19 is turned OFF (STEP 30), and the process returns to STEP 20.

[0081] As described above, in the cooking system 1 of the modified example, from the time when the left-side extinguishing button 16a is pressed and held to start pairing on the gas stove 10 until pairing is completed, even if any of the extinguishing buttons 16a, 16b, and 16g is in the ON state, the solenoid 34 of the corresponding electromagnetic safety valve 22a, 22b, and 22g is de-energized. In this manner, even if the left-side extinguishing button 16a is in the ON state, when the pairing start operation is completed, the solenoid 34 of the corresponding electromagnetic safety valve 22a is not continuously energized, and the electromagnetic safety valve 22a is in a closed state. Therefore, even if the user performs the start operation with the gas valve open, combustion in the left-side burner 13a will not continue, and the user can perform the pairing operation on the smartphone 50 while ensuring safety. Furthermore, even if any of the ignition / extinction buttons 16a, 16b, and 16g is operated and turned ON separately from the start operation during pairing that has been started based on the start operation of pairing, the corresponding electromagnetic safety valves 22a, 22b, and 22g will also be closed, making it possible to avoid continued combustion in each burner 13a, 13b, and 15a that is being paired.

[0082] In the above-described modified example, the pairing start operation on the gas stove 10 is performed by pressing and holding one of the three ignition / extinguishing buttons 16a, 16b, and 16g (left ignition / extinguishing button 16a), but this is not limited thereto, and the three ignition / extinguishing buttons 16a, 16b, and 16g may be pressed simultaneously or in a predetermined order. In this case as well, when the pairing start operation is completed, although the three ignition / extinguishing buttons 16a, 16b, and 16g are in the ON state, the electromagnetic safety valves 22a, 22b, and 22g are de-energized to the solenoids 34 and are in the closed state, thereby preventing continued combustion in the burners 13a, 13b, and 15a. Furthermore, in the above-described embodiment, when the pairing start operation on the gas stove 10 is completed, all of the ignition / extinction buttons 16a, 16b, and 16g are in the OFF state. However, by applying the pairing restriction process of the modified example, it is possible to prevent combustion in each burner 13a, 13b, and 15a during pairing from continuing even if any of the ignition / extinction buttons 16a, 16b, and 16g is operated separately from the start operation during pairing that has been started based on the pairing start operation.

[0083] Furthermore, in the cooking system 1 of the modified example, the notification LED 19 is made to flash from the time when the pairing start operation is performed on the gas stove 10 until the pairing is completed. In this way, the user can recognize that pairing is in progress by the flashing of the notification LED 19, and can reliably perform the operations until the pairing is completed. In addition, because the user is aware that pairing is in progress, it is possible to prevent the fact that combustion in each of the burners 13a, 13b, and 13g is not continued during pairing from being mistaken for a malfunction of the gas stove 10.

[0084] Note that the cooking system 1 of the above-described embodiment may also notify the user that pairing is in progress. The means for notifying the user that pairing is in progress is not limited to the notification LED 19. For example, in a gas stove 10 equipped with a speaker, the notification may be made by outputting a voice or music from the speaker. For example, a voice message such as "Pairing in progress" may be output from the speaker during pairing. Furthermore, in a gas stove 10 with a temperature control function equipped with a two-digit seven-segment LED that displays the temperature, even though a six-digit passcode cannot be displayed on the two-digit seven-segment LED, the user may be notified that pairing is in progress by displaying letters or the like on the two-digit seven-segment LED instead of numbers that represent the temperature.

[0085] The above describes the heating and cooking system 1 in the embodiment and modified examples, but the present invention is not limited to the above embodiment and modified examples, and can be implemented in various forms within the scope of the gist of the present invention.

[0086] For example, in the above-described embodiment, the sticker 10s bearing the two-dimensional code is attached to the top plate 12. However, the location where the sticker 10s is attached is not limited to the top plate, and it may be attached to the front or side of the stove body 11. Also, instead of writing the two-dimensional code on the sticker 10s, it may be written (printed) directly on the top plate 12 or the stove body 11.

[0087] In the above-described embodiment, a two-dimensional code containing passcode information is printed on the sticker 10s. However, the passcode itself may be printed directly on the sticker 10s. In this case, the user does not need to read the sticker 10s with the camera 56 of the smartphone 50; instead, the user simply checks the passcode printed on the sticker 10s and enters the passcode when an input field appears on the display 51 of the smartphone 50. In addition, the sticker 10s bearing the passcode may be attached in a location that is not normally visible to the user. For example, the sticker 10s may be attached to the inside of the battery case 18, so that the user cannot see the passcode on the sticker 10s unless the battery case 18 is opened. This enhances the confidentiality of the passcode.

[0088] In the above-described embodiment, the operation to start pairing on the gas stove 10 is performed by operating the ignition / extinction buttons 16a, 16b, and 16g. However, the operation to operate the ignition / extinction buttons 16a, 16b, and 16g may be combined with the operation to supply power to the gas stove 10. For example, the pairing start operation may be completed by removing the dry batteries from the battery case 18, turning all three ignition / extinction buttons 16a, 16b, and 16g to the ON state, and then inserting the dry batteries into the battery case 18. In this case, when the user presses each of the three ignition / extinction buttons 16a, 16b, and 16c to the fully depressed position, the solenoids 34 are not energized, and the electromagnetic safety valves 22a, 22b, and 22g are not maintained in the open state. When the user releases the pressure, the ignition / extinction buttons 16a, 16b, and 16g remain in the ON state (intermediate position), and the main valves 23a, 23b, and 23g are open. Even if dry batteries are inserted into the battery case 18 and the solenoids 34 are energized in this state, the electromagnetic safety valves 22a, 22b, and 22g will not be open, and combustion in the burners 13a, 13b, and 15a will stop. This allows the user to perform pairing operations on the smartphone 50 in a safe environment. If commercial power is supplied to the gas stove 10 instead of dry batteries, the pairing operation may be completed by turning the power switch OFF, setting all three ignition / extinction buttons 16a, 16b, and 16g to the ON state, and then turning the power switch ON.

[0089] In the above-described embodiment, the cooking device for heating the food to be cooked is a gas stove 10 that burns a mixture of fuel gas and air. However, the cooking device is not limited to the gas stove 10, and may be an electromagnetic induction heating stove (a so-called IH stove) that includes a magnetic force generating coil and heats a metal cooking vessel by passing electricity through the coil.

[0090] In the above-described embodiment, the smartphone 50 is used as an example of an information terminal that supports wireless communication with a cooking appliance. However, the information terminal is not limited to the smartphone 50, and may be a tablet or the like as long as it has the same functions as the display unit 51, the transmitter 52, the receiver 53, the storage unit 54, the display control unit 55, and the camera 56 described above. [Explanation of symbols]

[0091] 1...heating cooking system, 10...gas stove, 10s...seal, 11...Stove body, 12...Top plate, 13...Stove burner, 14...trivet, 15...grill, 15a...grill burner, 15d...Grill door, 16...Fire extinguishing button, 17...Heat adjustment lever, 18...battery case, 19...alert LED, 20...gas passage, 21...branch path, 22...electromagnetic safety valve, 23...main valve, 24...flow control valve, 25...spark plug, 26...thermocouple, 27...Pot bottom temperature sensor, 28...Grill temperature sensor, 30...Valve hole, 31... valve seat, 32... valve body, 33... biasing spring, 34... solenoid, 35... valve hole, 36... valve seat, 37... valve body, 38... biasing spring, 39... rod, 40...controller, 41...transmitter, 42...receiver, 43...storage unit, 50...smartphone, 51...display unit, 52: transmitting unit; 53: receiving unit; 54: storage unit; 55...display control unit, 56...camera.

Claims

1. In a cooking system in which a cooking device that heats food by a heating unit and an information terminal that supports wireless communication with the cooking device are wirelessly connected, The cooking device includes: a storage unit that stores in advance specific authentication information used for mutual authentication of the wireless connection; a display unit on which the specific authentication information is displayed so as to be visible to a user regardless of whether or not power is being supplied to the cooking appliance; a transmitter that transmits a wireless signal for starting the mutual authentication when a predetermined start operation is performed by a user; Equipped with the information terminal includes an acquisition unit that acquires the specific authentication information through a predetermined input operation by a user based on the indication on the indication unit after receiving the wireless signal from the transmission unit, The mutual authentication is successful when the specific authentication information stored in advance in the storage unit matches the specific authentication information acquired by the acquisition unit. A heating and cooking system characterized by the above.

2. The cooking system according to claim 1, The specific authentication information is written in an encrypted state on the writing portion, The information terminal includes a decoding unit that decodes the specific authentication information from the notation in the notation unit. A heating and cooking system characterized by the above.

3. The heating and cooking system according to claim 1 or 2, The cooking device includes a heating operation unit for a user to operate the heating unit, The start operation is an operation performed on the heating operation unit, and is completed by an operation to stop heating of the heating unit. A heating and cooking system characterized by the above.

4. The heating and cooking system according to claim 1 or 2, The cooking device includes: A heating operation unit for a user to operate the heating unit; a control unit that controls heating of the heating unit based on an operation on the heating operation unit; Equipped with The start operation includes at least an operation performed on the heating operation unit, and is completed in a state where power is supplied to the cooking appliance, The control unit does not allow the heating unit to perform heating from the time the start operation is performed until the time the mutual authentication process is completed. A heating and cooking system characterized by the above.

5. The heating and cooking system according to claim 1 or 2, The cooking device includes a notification unit that notifies the state of the cooking device, The notification unit notifies the user that the mutual authentication process is in progress from the start operation until the mutual authentication process is completed. A heating and cooking system characterized by the above.

6. A cooking device for heating food by a heating unit and a cooking system for wirelessly connecting an information terminal compatible with wireless communication with the cooking device, a storage unit that stores in advance specific authentication information used for mutual authentication of the wireless connection; a display unit on which the specific authentication information is displayed so as to be visible to a user regardless of whether or not power is being supplied to the cooking appliance; a transmitter that transmits a wireless signal for starting the mutual authentication when a predetermined start operation is performed by a user; Equipped with the information terminal is provided with an acquisition unit that, after receiving the wireless signal from the transmission unit, acquires the specific authentication information through a predetermined input operation by a user based on the indication on the indication unit, The mutual authentication is successful when the specific authentication information stored in advance in the storage unit matches the specific authentication information acquired by the acquisition unit. A heating cooker characterized by:

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