JP6156925B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker.

  A cooking device such as a gas stove is provided with an operation part that can be externally operated, such as an ignition button, so that the state of a switch provided inside the apparatus is switched according to the operation of the operation part by the user. It has become. Moreover, in this kind of cooking-by-heating machine, the technique which detects the failure which arises in a switch and a related circuit like JP-A-2000-133, and notifies that is detected.

JP 2013-24470 A

  By the way, when adopting a configuration in which the switch inside the apparatus is switched according to the operation of the operated unit as described above, redundancy can be achieved by providing two or more switches that switch according to the operation of the operated unit. . For example, when the operated part is turned on, the two switches are in an operating state corresponding to the on state, and even if one of the switches fails, the operating state of the other switch is determined. It becomes possible to grasp the state of. Further, in such a configuration, when there is a contradiction between the state of one switch and the state of the other switch, it can be determined that a failure has occurred in one of the switches. For example, if one switch indicates the ON state of the operated part and the other switch indicates the OFF state of the operated part, it is clear that one of the switches has failed. Therefore, it is possible to determine the failure of the switch based on such a logical contradiction.

  However, this configuration has a problem that when an abnormality occurs in the connection path between the two switches and the control circuit that determines the state of the switches, the abnormality cannot be grasped. For example, when two switches and a control circuit are electrically connected via a connecting portion of a pair of connectors, if the connector is disconnected and the connection is released, each of the two switches goes to the control circuit. The signal will be cut off in the path. In this case, even if the operated part is turned on and each switch is switched, the signal from each switch is not input to the control circuit, so the control circuit can grasp that the operated part is on. Disappear. Accordingly, there arises a problem that the control circuit does not properly handle the operation of the operated part.

  Also, in the path through which signals from both switches are input to the control circuit, the signal state that is input to the control circuit via the path when the connector is disconnected, and for example, when the operated part is turned off in the normal state When the signal states input to the control circuit through the path are the same, these states cannot be distinguished only by the abnormality determination based on the logical contradiction of both switches. That is, in this case, there may be a situation in which the control circuit continues to determine that the connection path is normal even though there is an abnormality in the connection path.

  The present invention has been made in order to solve the above-described problems, and can be made redundant by a plurality of switches, and when an abnormality occurs in the switch or the connection path, an abnormality occurs in any part. It is an object of the present invention to provide a configuration that can more easily determine whether or not there is a problem.

The present invention provides an operated portion that is displaced at least between a first position and a second position;
When the operated part is in the first position, it is either on or off, and when the operated part is in the second position, it is either on or off. A first switch and a second switch of the configuration;
A first transmission port connected to the input side of the first switch, a second transmission port connected to the input side of the second switch, and a first reception port connected to the output side of the first switch; And a second reception port connected to the output side of the second switch, through the first transmission port and the second transmission port, and through the first reception port and the second reception port. A control circuit for receiving signals;
At least a terminal conducting to each signal line from the first transmission port and the second transmission port of the control circuit and a terminal conducting to each signal line from the first reception port and the second reception port are arranged. The control circuit side connector, the terminals connected to the signal lines on the input side of the first switch and the second switch, and the signal lines on the output side of the first switch and the second switch. A switch-side connector on which a terminal to be arranged is provided, and a connector portion to which the control circuit-side connector and the switch-side connector are detachably connected,
With
At the time of regular connection in which the control circuit side connector and the switch side connector are connected, the first circuit on the first switch and the second switch side and the second circuit on the control circuit side are connected,
The first circuit includes a signal line connected to the target transmission port of either the first transmission port or the second transmission port in the second circuit, and the first reception port or the second circuit in the second circuit. A conduction line is provided for conducting a signal line connected to one of the target reception ports of the second reception port without passing through the first switch and the second switch at the time of regular connection;
The control circuit determines an abnormality of the connector unit based on a reception result at the target reception port at the time of a predetermined signal transmission from the target transmission port, and at least when the connector unit is determined to be normal, The position of the operated portion based on each transmission signal transmitted from each of the first transmission port and the second transmission port and each reception signal received by the first reception port and the second reception port, respectively. to determine the,
The first circuit includes:
A first signal line that is electrically connected to the signal line from the first transmission port via the connector and connected to the input side of the first switch;
A second signal line conducting to the signal line from the first transmission port via the connector part and conducting to the second reception port via the connector part;
A third signal line that is electrically connected to the signal line from the second transmission port via the connector and connected to the input side of the second switch;
A fourth signal line connected to the output side of the first switch and conducting to the first reception port via the connector;
A fifth signal line connected to the output side of the second switch and conducting to the second reception port via the connector;
With
The second signal line is configured as the conductive line;
The first transmission port is configured as the target transmission port;
The second receiving port is configured as the target receiving port;
The first switch is either on or off when the operated part is in the first position, and is in another state when the operated part is in the second position,
The second switch is configured to be in the other state when the operated part is in the first position, and to be in any one of the states when the operated part is in the second position. ,
The control circuit includes:
A first reception state obtained at each of the first reception port and the second reception port when an H level signal is transmitted from the first transmission port and an L level signal is transmitted from the second transmission port; The connector based on a second reception state obtained at each of the first reception port and the second reception port when an L level signal is transmitted from one transmission port and an H level signal is transmitted from the second transmission port It is determined whether or not the part is abnormal, and the position of the operated part is determined .

In the first aspect of the invention, the first circuit on the first switch and the second switch side is connected to the target transmission port of the control circuit at the time of regular connection in which the control circuit side connector and the switch side connector are connected. A conduction line is provided for conducting the signal line and the signal line connected to the target reception port without going through the first switch and the second switch. Then, the control circuit determines an abnormality of the connector unit based on a reception result at the target reception port when a predetermined signal is transmitted from the target transmission port.
Thus, at the time of regular connection, the target transmission port and the target reception port are connected by a conductive line, and a signal transmission path that suppresses the influence of the first switch and the second switch is configured. Whether or not the signal transmission path is normally configured by transmitting a predetermined signal from the target transmission port and grasping the reception state at the target reception port at that time (ie, the control circuit side connector and the switch side connector It is possible to more accurately confirm whether or not the two are normally connected.
When at least the connector portion is determined to be normal, the transmission signals transmitted from the first transmission port and the second transmission port, respectively, and the reception signals received at the first reception port and the second reception port, respectively. If the position of the operated part is determined based on the above, it is possible to suppress misrecognition and the like due to the abnormality of the connector part, and thus it is possible to determine the position of the operated part with higher accuracy.

According to the first aspect of the present invention, in the first circuit, the first signal line that conducts to the signal line from the first transmission port via the connector portion and is connected to the input side of the first switch, and the connector portion A second signal line that conducts to the signal line from the first transmission port through the connector portion and a conduction through the connector portion to the second reception port and a signal line from the second transmission port through the connector portion. A third signal line connected to the input side of the two switches, a fourth signal line connected to the output side of the first switch and connected to the first reception port via the connector, and an output side of the second switch And a fifth signal line connected to the second receiving port through the connector portion.
The second signal line is configured as a conduction line, the first transmission port is configured as a target transmission port, and the second reception port is configured as a target reception port. Further, the first switch is in an on or off state when the operated part is in the first position, and is in another state when the operated part is in the second position. When the operated portion is in the first position, the other state is set, and when the operated portion is in the second position, the state is set to any one of the states.
In this configuration, the path from the first transmission port to the second reception port via the second signal line can be used as a path for determining the connector connection state. In particular, instead of providing a completely dedicated transmission / reception port and short-circuit path, the port and path used for determining the switch status can also be used for determining the connector status, thereby reducing the number of ports and the number of signal lines. It becomes easy to plan reduction.
Furthermore, in the present invention, the control circuit transmits the H level signal from the first transmission port and transmits the L level signal from the second transmission port, and the first reception obtained at the first reception port and the second reception port, respectively. Connector based on the state and the second reception state respectively obtained at the first reception port and the second reception port when the L level signal is transmitted from the first transmission port and the H level signal is transmitted from the second transmission port It is configured to determine whether the part is abnormal and to determine the position of the operated part.
In this configuration, when the control circuit transmits an H level signal from the first transmission port during normal connection, a signal corresponding to the H level signal is confirmed at the second reception port. That is, if the signal corresponding to the H level signal is not confirmed at the second receiving port, it can be determined that the connector is not normally connected.
When it can be determined that the connector is normally connected, the first reception port and the second reception port are transmitted when the H level signal is transmitted from the first transmission port and the L level signal is transmitted from the second transmission port. And a second reception state obtained respectively at the first reception port and the second reception port when an L level signal is transmitted from the first transmission port and an H level signal is transmitted from the second transmission port. Understanding the reception state makes it easier to more accurately determine the position of the operated portion on the assumption that the connector is normally connected.

In the invention of claim 2 , when the control circuit determines that the connector portion is normal based on the reception result at the target reception port, the first reception state and the second reception state are predetermined normal results. In such a case, it is determined that one of the first switch and the second switch is abnormal.
If such a determination method is used, the abnormality of the first switch or the second switch can be distinguished from the abnormality of the connector part and can be detected more accurately.

In the invention of claim 3 , the control circuit periodically performs the process of transmitting the predetermined signal from the target transmission port with a time interval, and periodically performs the processing of the target reception port in accordance with each transmission timing of the predetermined signal. The configuration is such that the reception result is detected to determine abnormality of the connector portion. By performing abnormality determination in this way, it is possible to greatly reduce power consumption in the control circuit and related circuits compared to a configuration in which a voltage for abnormality detection is always applied, and it is easy to achieve further power saving. Become.

FIG. 1 is a perspective view schematically illustrating the heating cooker according to the first embodiment. FIG. 2 is an explanatory view conceptually showing a gas supply path to each gas burner in the cooking device of FIG. FIG. 3 is a block diagram schematically illustrating an electrical configuration of the cooking device of FIG. FIG. 4 is a circuit diagram schematically showing the configuration of the switch unit in the cooking device of FIG. FIG. 5 is a flowchart illustrating the flow of determination processing performed in the heating cooker of FIG.

[First embodiment]
Hereinafter, a first embodiment embodying the present invention will be described with reference to the drawings.
(Overall configuration of cooking device)
The heating cooker 1 shown in FIG. 1 is configured as a built-in stove that can heat cooking utensils such as cooking pots. The cooking device 1 is provided with a right cooking unit 4a and a left cooking unit 4b so as to be exposed from a top plate 2 (top plate) constituting the upper surface of the cooking device body 1a. A small stove portion 4c is provided between the stove portions 4a and 4b and closer to the rear. A grill 3 is provided below the top plate 2 near the center of the inside of the heating cooker body 1a. The grill 3 is provided with a grill cabinet (not shown) for storing the food to be cooked and cooking with a grill burner (gas burner 54: FIG. 2), and this grill cabinet is provided on the front surface of the heating cooker body 1a. The grill door 3b provided can be opened and closed.

  Gas burners 51, 52, 53, and 54 shown in FIG. 2 are respectively provided on the right and left stove parts 4a, 4b, 4c, and grill 3 shown in FIG. As the gas supply path, a common supply path 60 serving as a common gas path to the plurality of gas burners 51, 52, 53, and 54, and the common supply path 60 toward the gas burners 51, 52, 53, and 54, respectively. A plurality of branch supply paths 61, 62, 63, 64 that branch off are provided. The common supply path 60 is provided with an original electromagnetic valve N1 that opens and closes the common supply path, and each branch supply path 61, 62, 63, 64 is provided with a thermal power adjusting unit and an opening / closing valve. ing.

  As shown in FIG. 2, for example, a branch supply path 61 to the gas burner 51 includes a safety valve 51 g that can open and close the branch supply path 61, a shut-off valve 51 f that can open and close the branch supply path 61, and gas to the gas burner 51. A thermal power adjustment valve 51e capable of adjusting the supply amount is provided. The safety valve 51g, the closing valve 51f, and the heating power adjustment valve 51e are driven by the stepping motor M1 shown in FIG. 3, and when the rotation angle of the stepping motor M1 falls within the first angle range, the safety valve 51g When the rotation angle of the motor M1 falls within the second angle range, the closing valve 51f opens, and when the rotation angle of the stepping motor M1 falls within the third angle range, the heating power adjustment valve 51e opens according to the rotation angle. The degree is set. That is, by controlling the rotation angle of the stepping motor M1, the opening / closing of the safety valve 51g, the closing valve 51f, and the opening degree of the heating power adjustment valve 51e can be controlled.

  As shown in FIG. 2, the branch supply path 62 to the gas burner 52 is also provided with a safety valve 52 g, a closing valve 52 f, and a heating power adjustment valve 52 e similar to the branch supply path 61, and the branch supply path 63 to the gas burner 53 is provided. Also, a safety valve 53g, a closing valve 53f, and a thermal power adjustment valve 53e similar to the branch supply path 61 are provided. The branch supply path 64 to the gas burner 54 (the upper burner 54a and the lower burner 54b) of the grill 3 is provided with a safety valve 54f and a thermal power adjustment valve 54e for opening and closing the branch supply path 64. The control of the safety valve 52g, the closing valve 52f, and the heating power adjustment valve 52e in the branch supply path 62 is the same as that of the branch supply path 61, and the safety valve 52g is controlled by controlling the rotation angle of the stepping motor M2 (FIG. 3). The opening / closing of the shut-off valve 52f and the opening degree of the heating power adjusting valve 52e can be controlled. Further, the control of the safety valve 53g, the closing valve 53f, and the heating power adjustment valve 53e in the branch supply path 63 is the same as that of the branch supply path 61, and the safety valve 53g is controlled by controlling the rotation angle of the stepping motor M3 (FIG. 3). The opening and closing of the shut-off valve 53f and the opening degree of the thermal power adjustment valve 53e can be controlled.

  As shown in FIG. 2, a branch supply path 64 to the gas burner 54 of the grill 3 includes a safety valve 54f that can open and close the branch supply path 64, and a thermal power adjustment valve 54e that can adjust the gas supply amount to the gas burner 54. And are provided. The safety valve 54f and the thermal power adjustment valve 54e are driven by a stepping motor M4 shown in FIG. 3, and the safety valve 54f is opened when the rotation angle of the stepping motor M4 falls within the first predetermined angle range. When the rotation angle of the stepping motor M4 falls within the second predetermined angle range, the opening degree of the thermal power adjustment valve 54e is set according to the rotation angle. In the example of FIG. 2, the heating power adjustment valve 54e that opens and closes by the control of the stepping motor M4 is illustrated, but instead of the heating power adjustment valve 54e, an electromagnetic valve that opens and closes the supply path 65b to the lower burner 54b, and an upper burner An electromagnetic valve that opens and closes the supply path 65a to 54a and a bypass path that bypasses these electromagnetic valves may be provided, and these electromagnetic valves may be opened and closed by conduction without using the stepping motor M4. The original solenoid valve N1 is configured as a known solenoid valve, for example, and can be switched between an open state and a closed state in accordance with a control signal from the microcomputer 10. Further, the stepping motors M1 to M4 and the original solenoid valve N1 are driven by drive circuits 41 to 45 that operate according to control signals from the microcomputer 10, as shown in FIG.

  Further, four rotation operation portions 6 are provided so as to correspond to the right stove portion 4a, the left stove portion 4b, the small stove portion 4c, and the grill 3, respectively. The first rotation operation unit 6a, the second rotation operation unit 6b, and the third rotation operation unit 6c are provided so as to be exposed from the right front panel 7a. It should be noted that the rotation operation unit 6a corresponding to the right cooking unit 4a is on the right side, and the rotation operation unit 6b corresponding to the left kitchen unit 6b is on the left side so as to match the actual positional relationship with each cooking unit. A rotation operation unit 6c corresponding to the stove unit 4c is disposed between the rotation operation units 6a and 6b. The fourth rotation operation unit 6d corresponding to the grill 3 is provided so as to be exposed from the left front panel 7b.

  The first rotation operation unit 6a performs ignition, extinguishing, and heating power adjustment of the right cooking unit 4a, is configured to be capable of pressing operation, and is configured to be capable of rotation operation. For example, at the time of fire extinguishing, as shown by the solid line in FIG. 1, the front surface portion of the rotary operation portion 6 a configured in a cylindrical shape is retracted backward. Then, by pressing the front surface portion from this state, the right cooking portion 4a is ignited, and as shown by the two-dot chain line 6 ′, the rotation operation portion 6a is moved forward from the time of extinguishing the fire. It is designed to protrude. Moreover, by rotating the rotation operation part 6a in one rotation direction in such a protruding state, the heating power of the corresponding right cooking unit 4a can be increased, and conversely, the rotation operation part 6a is changed to the other By rotating in the direction of rotation, it is possible to reduce the heating power of the corresponding right cooking unit 4a. Further, when the front portion is pressed in the protruding state indicated by the two-dot chain line 6 ′, the retracted state indicated by the solid line is restored, and at this time, the right cooking portion 4 a is extinguished.

  The rotation operation unit 6b performs ignition, extinguishing, and heating power adjustment of the left cooking unit 4b, the rotation operation unit 6c performs ignition, extinguishing, and heating power adjustment of the small cooking unit 4c, and the rotation operation unit 6d includes Ignition, extinguishing, and heating power adjustment of the grill 3 are performed. These differ only in object, and the basic structure and function are the same as those of the rotation operation unit 6a.

(Switch configuration)
Next, the configuration of the switch unit will be described. In this configuration, as shown in FIG. 3, switch units 30a, 30b, 30c, and 30d are provided corresponding to the rotation operation units 6a, 6b, 6c, and 6d, respectively. All of the switch units 30a, 30b, 30c, and 30d are configured as shown in FIG. 4, and are configured to output a signal corresponding to the state of the rotary operation unit to the microcomputer 10. In the following description, the case where the switch unit 30 shown in FIG. 4 is the switch unit 30a corresponding to the rotation operation unit 6a will be described as a specific example, but the other switch units 30b, 30c, and 30d are also the switch unit 30a. Is configured in the same manner and functions in the same manner.

  In this configuration, the rotation operation unit 6a corresponding to the operated unit is displaced between a first position (fire extinguishing position) indicated by a solid line and a second position (ignition position) indicated by a two-dot chain line in FIG. . A first switch SW1 and a second switch SW2 shown in FIG. 4 are provided on the rear side of the rotation operation unit 6a. The first switch SW1 is turned off when the rotation operation unit 6a is in the first position (fire extinguishing position), and is turned on when the rotation operation unit 6a is in the second position (ignition position). It has become. Conversely, the second switch SW2 is turned on when the rotation operation unit 6a is in the first position (fire extinguishing position), and is turned off when the rotation operation unit 6a is in the second position (ignition position). It becomes the composition which becomes.

  A microcomputer (hereinafter also referred to as a microcomputer) 10 corresponding to a control circuit includes a first transmission port P1 connected to the input side of the first switch SW1 and a second transmission port connected to the input side of the second switch SW2. P2, a first reception port P3 connected to the output side of the first switch SW1, and a second reception port P4 connected to the output side of the second switch SW2. The signal transmission from the first transmission port P1 and the second transmission port P2 and the signal reception through the first reception port P3 and the second reception port P4 are performed.

  Further, in this configuration, the first circuit 31 is provided on the first switch SW1 and the second switch SW2 side, and the second circuit 32 is provided on the microcomputer 10 side. The first circuit 31 is configured by, for example, a circuit board or a harness on which the first switch SW1 or the second switch SW2 is mounted. Further, the second circuit 32 is configured by, for example, a circuit board on which the microcomputer 10 is mounted, a harness, or the like. The switch side connector 21 is provided in a configuration electrically connected to the first circuit 31, and the control circuit side connector 22 is provided in a configuration electrically connected to the second circuit 32. The connector 22 and the switch-side connector 21 are detachably connected. The control circuit-side connector 22 and the switch-side connector 21 constitute a connector portion 20.

  The control circuit side connector 22 includes terminals T21 and T22 that are electrically connected to the signal lines L21 and L22 from the first transmission port P1 and the second transmission port P2 of the microcomputer 10, the first reception port P3, and the second reception port P4, respectively. Are connected to terminals T23 and 24 which are respectively connected to the signal lines L23 and L24. The switch-side connector 21 includes terminals T11 and T12 that are electrically connected to the input signal lines L11 and L13 of the first switch SW1 and the second switch SW2, and the first switch SW1 and the second switch SW2, respectively. Terminals T13 and T14 that are electrically connected to the signal lines L14 and L15 on the output side are arranged. When the control circuit side connector 22 and the switch side connector 21 are normally connected, the terminals T11, T12, T13, T14 of the switch side connector 21 are connected to the terminals T21, T22, T23, Each is in contact with T24 and becomes conductive.

  In this configuration, the first transmission port P1 functions as a target transmission port, and the second reception port P4 functions as a target reception port. The first circuit 31 is electrically connected to the signal line L21 (the signal line connected to the target transmission port) from the first transmission port P1 through the signal line L10 and the connector unit 20, and is input to the first switch SW1. A first signal line L11 connected to the side is provided. Further, the first circuit 31 is electrically connected to the signal line L21 from the first transmission port P1 through the signal line L10 and the connector unit 20, and the signal line L24 (target reception) through the signal line L15 and the connector unit 20. A signal line connected to the port) and a second signal line L12 conducting to the second reception port P4. The first signal line L11 and the second signal line L12 are branched from the signal line L10 from the terminal T11 connected to the signal line L21 with the connection portion A1 as a starting point.

  Further, the first circuit 31 includes a third signal line L13 that is electrically connected to the signal line L22 from the second transmission port P2 via the connector unit 20 and connected to the input side of the second switch SW2, and a first switch. The fourth signal line L14 connected to the output side of SW1 and conducted to the signal line L23 and the first reception port P3 via the connector unit 20, and the connector unit 20 connected to the output side of the second switch SW2 And a fifth signal line L15 conducting to the signal line L24 and the second reception port P4.

  In this configuration, the signal line L10, the second signal line L12, and a part of the fifth signal line L15 (the part between the connection portion A2 and the terminal T14) function as a conductive line, and the control circuit side connector 22 and the switch side connector 21 are normally connected (that is, the terminals T11, T12, T13, and T14 of the switch side connector 21 are in contact with the terminals T21, T22, T23, and T24 of the control circuit side connector 22, respectively. The first transmission port P1 (target transmission port) and the second reception port P4 (target reception port) are connected without going through the first switch SW1 and the second switch SW2. ing.

  Further, in this configuration, as shown in FIG. 4, the diode D1 is interposed between the switch SW1 and the terminal T13, and current is prevented from flowing from the terminal T13 side to the switch SW1 side. Further, a diode D2 is interposed between the switch SW2 and the terminal T14, so that current does not flow from the terminal T14 side to the switch SW2 side. Further, in the second signal line L12, a diode D3 is interposed between the connection portion A1 and the connection portion A2, and current is prevented from flowing from the connection portion A2 side to the connection portion A1 side. In this configuration, the signal line L23 between the terminal T23 and the first reception port P3 is connected to the ground via the resistor R1, and the signal line L24 between the terminal T24 and the second reception port P4 is The resistor R2 is connected to the ground.

  In the switch unit 30a configured as described above, the connector unit 20 is in a properly connected state (the terminals T11, T12, T13, and T14 of the switch side connector 21 are connected to the terminals T21, T22, T23, and T24 of the control circuit side connector 22). In the state of being in contact with each other), the first transmission port P1 and the second reception port P4 are always in a conductive state regardless of the state of the switches SW1 and SW2. Therefore, if the H level signal is not received at the second receiving port P4 when the H level signal is output from the first transmission port P1, it is found that the connector unit 20 is not in the normal connection state.

Further, when both the switches SW1 and SW2 are operating normally, the switch SW1 is turned off and the switch SW2 is turned on when the rotation operation unit 6a is in the first position (fire extinguishing position). Conversely, when the rotation operation unit 6a is in the second position (ignition position), the switch SW1 is turned on and the switch SW2 is turned off. Accordingly, when the rotation operation unit 6a is operated to the first position (fire extinguishing position) when both the switches SW1 and SW2 are operating normally and the connector unit 20 is in the normal connection state, the first transmission port When an H level signal is output from P1, an L level signal is received at the first reception port P3, and when an H level signal is output from the second transmission port P2, an H level signal is received at the second reception port P4. It will be. Therefore, when such a result is not obtained when it is determined that the connector unit 20 is in the normal connection state, it is found that one of the switches SW1 and SW2 is abnormal. In addition, when both of the switches SW1 and SW2 are operating normally and the connector unit 20 is in the normal connection state, when the rotation operation unit 6a is operated to the second position (ignition position), the first transmission port When an H level signal is output from P1, an H level signal is received at the first reception port P3, and when an H level signal is output from the second transmission port P2, an L level signal is received at the second reception port P4. It will be. Therefore, when such a result is not obtained when it is determined that the connector unit 20 is in the normal connection state, it is found that one of the switches SW1 and SW2 is abnormal.
In this configuration, the following switch determination process is performed on the premise of such a configuration of the switch unit 30.

(Switch judgment processing)
Next, switch determination processing performed by the microcomputer 10 will be described.
In the microcomputer 10, the determination process as shown in FIG. 5 for the switch unit 30a is performed periodically (periodically) at intervals of a predetermined short time (for example, a cycle of 50 ms). In the following description, “microcomputer output A” is an output voltage from the first transmission port P1, and “microcomputer output B” is an output voltage from the second transmission port P2. Further, “microcomputer input a” is an input voltage at the first reception port P3, and “microcomputer input b” is an input voltage at the second reception port P4.

  First, in the process of S1, the output from the first transmission port P1 (microcomputer output A) is set to H level, and the output from the second transmission port P2 (microcomputer output B) is set to L level. In the example of FIG. 5, the L level signal is 0V and the H level signal is 3V. And it is judged whether the input (microcomputer input a) in the 1st receiving port P3 in this output state is more than a predetermined threshold (for example, 1.5V) (S2). If it is determined in S2 that the input at the first receiving port P3 is less than the predetermined threshold value, the process proceeds to No in S2 and the switch 1 flag is set to 0 (S3). Conversely, if it is determined in S2 that the input at the first receiving port P3 is greater than or equal to the predetermined threshold value, the process proceeds to Yes in S2 and the switch 1 flag is set to 1 (S4). Then, after S3 or S4, it is determined in S5 whether or not the input (microcomputer input b) at the second receiving port P4 is equal to or higher than a predetermined threshold (for example, 1.5 V). If it is determined in S5 that the input at the second receiving port P4 is less than the predetermined threshold value, the process proceeds to No in S5, and the short circuit flag is set to 0 (S6). Conversely, if it is determined in S5 that the input at the second receiving port P4 is greater than or equal to the predetermined threshold value, the process proceeds to Yes in S5 and the short-circuit flag is set to 1 (S7). Thus, in the microcomputer 10, when the H level signal is transmitted from the first transmission port P1 and the L level signal is transmitted from the second transmission port P2, it is obtained at the first reception port P3 and the second reception port P4, respectively. The received reception state (first reception state) is grasped in S2 and S5.

  Then, after S6 or S7, the output from the first transmission port P1 is switched to L level and the output from the second transmission port P2 is switched to H level. Also in this case, for example, the L level signal is set to 0V and the H level signal is set to 3V. In S9, it is determined whether or not the input (microcomputer input b) at the second receiving port P4 in this output state is equal to or higher than a predetermined threshold (for example, 1.5 V). If it is determined in S9 that the input at the second receiving port P4 is less than the predetermined threshold value, the process proceeds to No in S9 and the switch 2 flag is set to 0 (S10). Conversely, if it is determined in S9 that the input at the second receiving port P4 is greater than or equal to the predetermined threshold value, the process proceeds to Yes in S9 and the switch 2 flag is set to 1 (S11).

  Then, after S10 or S11, it is determined whether or not the short circuit flag set in S6 or S7 is 0 (S12). If it is determined in S12 that the short-circuit flag set in S6 or S7 is 0, the process proceeds to Yes in S12, and it is determined that the switch is abnormal (S16). If it is determined in S16 that the switch is abnormal, the connector portion 20 is not in a normal connection state, the terminal T11 and the terminal T21 are not in contact, the terminal T14 and the terminal T24 are not in contact, or Since there is a high possibility of either of the two states, if it is determined in S16 that the switch is abnormal, such a connector abnormality can be suspected. In this configuration, if it is determined in S16 that the switch is abnormal, an error code (first notification information) corresponding to the switch abnormality in S16 is displayed on the display unit (not shown).

  On the other hand, if the short circuit flag set in S6 or S7 is 1, the process proceeds to No in S12, and it is determined whether or not the switch 1 flag set in S3 or S4 is 1 (S13). If it is determined in S13 that the switch 1 flag set in S3 or S4 is 1, the process proceeds to Yes in S13, and it is determined whether or not the switch 2 flag set in S10 or S11 is 1. Judgment is made (S17). If it is determined in S17 that the switch 2 flag set in S10 or 11 is 0, the process proceeds to No in S17, and it is determined that the rotation operation unit 6a is in the on state (switch on). (S19). That is, in the case of S19, since the switch SW1 is in the on state and the switch SW2 is in the off state, the position of the rotation operation unit 6a is the second position (ignition position) indicated by the two-dot chain line in FIG. It will be determined. When the rotation operation unit 6a is determined to be switched on in this way, ignition control is performed at the ramp unit 4a corresponding to the rotation operation unit 6a.

  On the other hand, if it is determined in S17 that the switch 2 flag set in S10 or 11 is 1, the process proceeds to Yes in S17 and determines that the switch is abnormal (S18). That is, in this case, since the switch SW1 is in the on state and the switch SW2 is also in the on state and does not occur at the normal time, it is determined that the switch is abnormal. If it is determined in S13 that the switch 1 flag set in S3 or S4 is 0, the process proceeds to No in S13, and whether the switch 2 flag set in S10 or S11 is 1 or not. (S14). If it is determined in S14 that the switch 2 flag set in S10 or 11 is 0, the process proceeds to Yes in S14 and determines that the switch is abnormal (S18). In other words, in this case, the switch SW1 is in the off state and the switch SW2 is also in the off state, which is a result that does not occur in the normal state. If it is determined in S18 that the switch is abnormal, the connector unit 20 is normally connected, but it is highly possible that either of the switches SW1 and SW2 is abnormal. Such an abnormality of the switch itself can be suspected. In this configuration, when it is determined in S18 that the switch is abnormal, an error code (second notification information) corresponding to the switch abnormality in S18 is displayed on the display unit (not shown).

  On the other hand, if it is determined in S14 that the switch 2 flag set in S10 or 11 is 1, the process proceeds to Yes in S14, and it is determined that the rotation operation unit 6a is in the off state (switch off). (S15). That is, in the case of S15, since the switch SW1 is in the off state and the switch SW2 is in the on state, it is determined that the position of the rotation operation unit 6a is the first position (fire extinguishing position) indicated by the solid line in FIG. Will be. When it is determined that the switch is turned off in this way, the fire extinguishing control or the fire extinguishing state is maintained in the toilet portion 4a corresponding to the rotation operation portion 6a.

  In this configuration, as shown in FIG. 4, when the connector unit 20 is normally connected, a conduction line (signal line) is formed between the first transmission port P1 (target transmission port) and the second reception port P4 (target reception port). L10, the second signal line L12, and a part of the fifth signal line) to form a signal transmission path in which the influence of the first switch SW1 and the second switch SW2 is suppressed. Therefore, in the microcomputer 10 corresponding to the control circuit, an H level signal (predetermined signal) is transmitted from the first transmission port P1 (target transmission port) as in S1, and the second reception port P4 at the time of the predetermined signal transmission is transmitted. By grasping the reception state at (target reception port) in S5 to S7, whether or not the signal transmission path is normally configured (that is, the control circuit side connector 22 and the switch side connector 21 are normally connected). In S12, it is possible to accurately confirm whether or not

  When at least the connector unit 20 is determined to be normal (that is, when the process proceeds to No in S12), each transmission signal transmitted from each of the first transmission port P1 and the second transmission port P2 and the first reception If the position of the rotation operation unit 6a is determined based on the received signals respectively received at the port P3 and the second reception port P4, it is possible to suppress misrecognition caused by the abnormality of the connector unit 20, etc. It becomes possible to determine the position of the rotation operation unit 6a with higher accuracy.

  Further, in this configuration, a path from the first transmission port P1 to the second reception port P4 via the second signal line L12 can be used as a path for determining the connection state of the connector unit 20. It has become. In particular, instead of providing a completely dedicated transmission / reception port and short-circuit path, the port and path used for determining the switch status can also be used for determining the connector status, thereby reducing the number of ports and the number of signal lines. It becomes easy to plan reduction.

  Further, in this configuration, when the microcomputer 10 transmits an H level signal from the first transmission port P1 when the connector unit 20 is normally connected, a signal corresponding to the H level signal is confirmed at the second reception port P4. It will be. That is, if the signal corresponding to the H level signal is not confirmed at the second reception port P4, the process proceeds to Yes in S12, and it can be determined in S16 that the connector unit 20 is not normally connected. . And when it can be judged that the connector part 20 is normally connected, ie, when progressing to No in S12, an H level signal is transmitted from the 1st transmission port P1, and L is transmitted from the 2nd transmission port P2. A first reception state (determination result in S2) obtained at each of the first reception port P3 and the second reception port P4 when the level signal is transmitted, an L level signal transmitted from the first transmission port P1, and the second If the second reception state (judgment result in S9) obtained at the first reception port P3 and the second reception port P4 when the H level signal is transmitted from the transmission port P2, the connector is normally connected. As a result, it becomes easier to more accurately determine the position of the rotation operation unit 6a.

  Further, in the microcomputer 10 corresponding to the control circuit, when it is determined that the connector unit 20 is normal based on the reception result at the second reception port P4 (target reception port), the first reception state and the first reception state described above are used. When the 2 reception state is not a predetermined regular result, it is determined that either one of the first switch SW1 and the second switch SW2 is abnormal as in S18. If such a determination method is used, the abnormality of the first switch SW1 or the second switch SW2 can be distinguished from the abnormality of the connector unit 20 and can be detected more accurately.

  Further, in this configuration, the microcomputer 10 periodically performs the process of FIG. 5 at a short time interval (for example, a period of 50 ms), and performs the process of S1 (that is, a predetermined signal (H level signal from the first transmission port P1). ) Is performed periodically (periodically) with a time interval. Then, the reception result of the second reception port P4 is detected periodically (periodically) in accordance with each transmission timing of the predetermined signal (H level signal) from the first transmission port P1, and the abnormality of the connector unit 20 is determined. It has a configuration. If abnormality determination is performed in this way, power consumption in the microcomputer 10 and related circuits can be significantly reduced as compared with a configuration in which an abnormality detection voltage is always applied, thereby further reducing power consumption. It becomes easy.

[Other Embodiments]
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention.

  In the embodiment described above, an example in which the process as illustrated in FIG. 5 is performed on the switch unit 30a has been described. However, the microcomputer 10 performs the process illustrated in FIG. 5 for any of the switch units 30b, 30c, and 30d. Can be done individually.

  In the above embodiment, a 3V signal is exemplified as the H level signal and a 0V signal is exemplified as the L level signal. However, the voltage of the H level signal only needs to be higher than the L level signal, and the voltage setting is variously changed. it can.

DESCRIPTION OF SYMBOLS 1 ... Cooking device 6 ... Rotation operation part (operation part)
10 ... Microcomputer (control circuit)
DESCRIPTION OF SYMBOLS 20 ... Connector part 21 ... Switch side connector 22 ... Control circuit side connector 31 ... 1st circuit 32 ... 2nd circuit P1 ... 1st transmission port (target transmission port)
P2 ... second transmission port P3 ... first reception port P4 ... second reception port (target reception port)
SW1 ... 1st switch SW2 ... 2nd switch L11 ... 1st signal line L12 ... 2nd signal line L13 ... 3rd signal line L14 ... 4th signal line L15 ... 5th signal line L21-L24 ... Signal line T11-T14 ... Terminals T21 to T24 ... Terminal

Claims (3)

An operated portion that is displaced to at least a first position and a second position;
When the operated part is in the first position, it is either on or off, and when the operated part is in the second position, it is either on or off. A first switch and a second switch of the configuration;
A first transmission port connected to the input side of the first switch, a second transmission port connected to the input side of the second switch, and a first reception port connected to the output side of the first switch; And a second reception port connected to the output side of the second switch, through the first transmission port and the second transmission port, and through the first reception port and the second reception port. A control circuit for receiving signals;
At least a terminal conducting to each signal line from the first transmission port and the second transmission port of the control circuit and a terminal conducting to each signal line from the first reception port and the second reception port are arranged. The control circuit side connector, the terminals connected to the signal lines on the input side of the first switch and the second switch, and the signal lines on the output side of the first switch and the second switch. A switch-side connector on which a terminal to be arranged is provided, and a connector portion to which the control circuit-side connector and the switch-side connector are detachably connected,
With
At the time of regular connection in which the control circuit side connector and the switch side connector are connected, the first circuit on the first switch and the second switch side and the second circuit on the control circuit side are connected,
The first circuit includes a signal line connected to the target transmission port of either the first transmission port or the second transmission port in the second circuit, and the first reception port or the second circuit in the second circuit. A conduction line is provided for conducting a signal line connected to one of the target reception ports of the second reception port without passing through the first switch and the second switch at the time of regular connection;
The control circuit determines an abnormality of the connector unit based on a reception result at the target reception port at the time of a predetermined signal transmission from the target transmission port, and at least when the connector unit is determined to be normal, The position of the operated portion based on each transmission signal transmitted from each of the first transmission port and the second transmission port and each reception signal received by the first reception port and the second reception port, respectively. to determine the,
The first circuit includes:
A first signal line that is electrically connected to the signal line from the first transmission port via the connector and connected to the input side of the first switch;
A second signal line conducting to the signal line from the first transmission port via the connector part and conducting to the second reception port via the connector part;
A third signal line that is electrically connected to the signal line from the second transmission port via the connector and connected to the input side of the second switch;
A fourth signal line connected to the output side of the first switch and conducting to the first reception port via the connector;
A fifth signal line connected to the output side of the second switch and conducting to the second reception port via the connector;
With
The second signal line is configured as the conductive line;
The first transmission port is configured as the target transmission port;
The second receiving port is configured as the target receiving port;
The first switch is either on or off when the operated part is in the first position, and is in another state when the operated part is in the second position,
The second switch is configured to be in the other state when the operated part is in the first position, and to be in any one of the states when the operated part is in the second position. ,
The control circuit includes:
A first reception state obtained at each of the first reception port and the second reception port when an H level signal is transmitted from the first transmission port and an L level signal is transmitted from the second transmission port; The connector based on a second reception state obtained at each of the first reception port and the second reception port when an L level signal is transmitted from one transmission port and an H level signal is transmitted from the second transmission port A cooking device characterized by determining whether or not a portion is abnormal and determining the position of the operated portion . When the control circuit determines that the connector unit is normal based on a reception result at the target reception port, the first reception state and the second reception state are not predetermined normal results. The cooking device according to claim 1, wherein an abnormality is determined for any of the first switch and the second switch . The control circuit periodically performs a process of transmitting the predetermined signal from the target transmission port with a time interval, and periodically receives a reception result of the target reception port according to each transmission timing of the predetermined signal. The cooking device according to claim 1 or 2 , wherein an abnormality of the connector portion is detected by detection .

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