JP2009070714A - Heating cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To detect abnormality and to carry out reactions such as a repair or an exchange quickly without turning on a power switch even when the operational validation whether or not the power is switched on is not performed when the connected state is not adequate enough in setting. <P>SOLUTION: A control part 4 for controling a heating cooking device is provided with a disconnection detecting means 45 for detecting normality/abnormality of a connection with an operation part 5 having an input means 50 including the power switch by a connecting cable 9 in which a plurality of signal lines for electrically connecting a notifying means 46, the control part 4 and the operation part 5 are bound together. When a power switch 2 is turned on, a power source 47 is supplied, and when the disconnection detecting means 45 detects the abnormality of the connection between the control part 4 and the operation part 5, the power source 47 is supplied to the control part 4 even when the power switch 2 remains in off-state. Accordingly, the notification of abnormality by the notification means 46 becomes possible. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a heating cooker used for general household and business use, and more particularly to a heating cooker in which a control unit and an operation unit are electrically connected by a cable.

  Conventionally, a control unit that performs cooking and a control unit that operates heating start / stop or controls the strength of heating power are separated, and the operation unit and the control unit are appropriate in a heating cooker that is electrically connected by a cable. A conventional cooking device has been disclosed in which, when not connected to each other, an abnormality is displayed in each case (see, for example, Patent Document 1).

  Hereinafter, a conventional cooking device will be described with reference to FIG. FIG. 3 is a circuit block diagram of a conventional cooking device. In FIG. 3, an AC power source 1, a power switch 2, a heating unit 3, a control unit 4, and an operation unit 5 are connected, and the control unit 4 and the operation unit 5 are connected by a connection cable 9 to exchange electric signals and power. Is going.

  The heating unit 3 includes a rectifier 30, a heating coil 31, a switching unit 32, and an inverter circuit 33.

  The control unit 4 includes a control unit 41, a modulation unit 42, a demodulation unit 43, a second display unit 44, a DC power supply 47, and a power holding switch 48.

  The operation unit 5 includes an input unit 50, a heating setting unit 51, a modulation unit 52, a demodulation unit 53, and a first display unit 54.

  The temperature detection means 6 detects the temperature of the load pan 7 by the heat conduction of the top plate 8 when the load pan 7 is placed on the top plate 8 and heated by the heating unit 3.

  In the heating unit 3, the inverter 33 is operated at several tens of kHz by the switching means 32 and a high frequency current is applied to the heating coil 31 to inductively heat the load pan 7. And the output of the heating part 3 is controlled by changing the conduction | electrical_connection time of the switching means 32, and changing the operating frequency of the inverter 33 depending on the case.

  Further, when the temperature detection means 6 provided in the apparatus detects an abnormality such as an excessive increase in the temperature of the cooking object, a disconnection of the temperature detection means 6, an abnormally high temperature of the inverter 33, an abnormal operation, or the like. The output of the heating unit 3 is stopped by turning off the inverter 33.

  When the power switch 2 is turned on by the user, the control unit 4 is supplied with power to the DC power supply 47, and is supplied to the control unit 41, the modulation unit 42, the demodulation unit 43, the second display unit 44, and the operation unit 5. A DC voltage of 20V is supplied by the DC power supply 47. When the output of the DC power supply 47 is supplied to the control means 41, the control means 41 turns on the power holding switch 48. Therefore, even if the user changes the state of the power switch 2 from on to off, the power holding switch 48 allows the output of the DC power supply 47 to continue supplying power to the control means 41. Therefore, for example, even if the user turns off the power switch 2 while the second display means 44 indicates that the top plate 8 is hot after cooking, the control means 47 continues to keep the plate 8 It is possible to continue the display that alerts that the temperature is high.

  In the operation unit 5, the heating setting means 51 changes / maintains the setting such as the cooking mode, the setting output or the setting temperature, changes the setting by a signal from the input means 50, and controls the first display means 54. Thus, the setting or the abnormality of the induction heating unit 3 or the like is displayed.

  The control unit 4 and the operation unit 5 include modulation means 42 and 52 and demodulation means 43 and 53, respectively. The modulation means 42 and 52 convert the input signal into a digital signal of a predetermined digit and serially output it, and demodulate this signal. The means 43 or 53 has a communication configuration in which it is received through the connection cable 5 and converted back to the original signal. Then, the settings such as the set output and set temperature in the heating setting means 51 are transmitted to the control means 41 through the modulation means 52 and the demodulation means 43, and the abnormality in the heating unit 3 detected by the control means 41 is modulated. This is transmitted to the heating setting means 51 through 53.

  FIG. 2 is an external view of a conventional cooking device. Usually, in an induction heating cooker that is a heating cooker, the top plate 8 is the upper surface of the device, and the input means 50 is arranged on the side surface facing the person who uses the device. As shown in FIG. 2A, the first display means 54 is arranged in the vicinity of the input means 50, and the second display means 34 is arranged in the vicinity of the top plate 8. The vicinity of the top plate 8 is a position that is easy to see when cooking, and the vicinity of the input means 50 is a position that is easy to see when the input means 50 is operated to turn on / off the power switch 2 or change the heating power setting.

  FIG. 2B is an external view of the first display means 54 and the second display means 44. Normally, the display means 44 and 54 are configured using light emitting diodes (abbreviated as LEDs), liquid crystal display elements (abbreviated as LCDs), etc., but the display means 44 and 54 of the conventional configuration are configured using LEDs. . As shown in FIG. 2 (b), the first display means 54 and the second display means 44 have seven LEDs, LEDs 1 to 7 and LEDs 11 to 17, in order to represent the seven-stage setting output of the heating unit 3. Is provided. In addition, an LED 8 and an LED 18 (hereinafter referred to as a power LED) are provided to indicate on / off of the power switch 2. Further, an LED 9 and an LED 19 (hereinafter referred to as a high temperature LED) are provided for detecting and notifying that the top plate 8 is at a high temperature by heat conduction from the load pan 7 heated by the heating unit 3. Yes. When the power switch 2 is turned on and the power LED is lit, and the heating unit 3 is in an output stop state (hereinafter referred to as an initial mode), the power holding switch 40 is turned on and power is supplied to the control unit 3 even when the power switch 2 is turned off. When the power LED is turned off, the high temperature LED blinks, and some functions are operating, such as displaying an abnormality of the device (hereinafter referred to as the holding mode), the power switch 2 is turned off and the power LED 8 is turned off. Three stop modes, such as a state where all the functions of the cooking device are stopped (hereinafter referred to as a standby mode), are separately displayed by LEDs 1 to 9 and LEDs 11 to 19. Moreover, in order to display and distinguish the cooking mode and the three stop modes, the seven LEDs 1 to 7 and the LEDs 11 to 17 are provided.

  The operation of the conventional cooking device configured as described above will be described with reference to FIGS. First, when the power switch 2 is turned on, the power LEDs 8 and 18 are lit to indicate that the mode has shifted to the initial mode. At this time, if the top plate 8 is at a high temperature, the operation of the high temperature LEDs 9 and 19 is started, and even if the power holding switch 48 is turned on and the power switch 2 is turned off, the operation of the high temperature LEDs 9 and 19 is continued. After the temperature of the plate 8 is lowered and it becomes unnecessary to operate the high temperature LEDs 9 and 19, the power holding switch 48 is turned off.

  When the power switch 2 is in the on state and the input unit 50 shifts to the cooking mode, the controller 3 operates (lights) the high temperature LEDs 9 and 19 when the temperature of the top plate 8 becomes high. Further, when the load pan 7 is excessively heated and the temperature exceeds 210 ° C., for example, the operation of the inverter 33 is stopped while the cooking mode display is continued.

  After operating the input means 50 and stopping the cooking mode, if the top plate 8 is hot, the high temperature LEDs 9 and 19 are operated (flashing). Regardless of whether the power switch 2 is on or off, the high temperature LED continues to blink when the high temperature of the top plate 8 is detected by the temperature detection means 6 except in the cooking mode.

  In the holding mode in which the high temperature LED is blinking with the power switch 2 turned off, the control means 41 turns on the power holding switch 48 and continues to blink the high temperature LEDs 9 and 19, and the temperature of the top plate 8 decreases and becomes high. When it is no longer necessary to notify the state, the high temperature LEDs 9 and 19 stop blinking, the power holding switch 48 is turned off, and a transition is made to the standby mode.

  In this configuration, the control unit 4 and the operation unit 5 send and receive fire power adjustment and abnormality display signals by the modulation means 42 and 52 and the demodulation means 43 and 53, respectively, via the connection cable 9, and are provided on the top plate 8. The content suitable for the display position can be displayed by the second display means 44 or the first display means 54 provided in the operation unit 5 so that the user can easily recognize and operate.

  For example, when the input unit 50 is being operated, since the device is viewed from the front of the input unit 50 shown in FIG. 2 (a), the first display unit 54 disposed in the vicinity of the device changes the setting or is in an abnormal state. Easy to check out. In addition, when cooking such as putting the cooking object 9 into the load pan 7, the user puts his viewpoint on the equipment and looks at the load pan 7, so the second display means 44 sets the current setting. Easy to confirm. In addition, when an abnormality occurs in the heating unit 3 or when transmission / reception of signals by the modulation means 42 and 52 and the demodulation means 43 and 53 is not normal, the first display means 54 and the second display means 44 By displaying the abnormality, it can be easily recognized.

  As described above, according to the conventional example, after the power switch 2 is turned on, the first display unit 54 and the second display unit 44 have a function of displaying an abnormality. Can easily recognize abnormalities.

On the other hand, in the conventional configuration, when a disconnection abnormality is detected, the disconnection can be detected (displayed) only when the power switch is turned on (after being turned on). In some cases, the connection to the operation unit including the problem may occur. In this case, even if the user turns on the power switch 2, the abnormality cannot be detected and cannot be displayed.
JP 2001-357967 A

  However, in the conventional method for determining whether the connection between the heating unit and the operation unit is normal or abnormal, when the power switch is turned on and power is supplied to the control unit and the operation unit, the heating unit However, if the power switch remains off, power is not supplied to the control unit and the operation unit, and the abnormality is detected. It was the composition which became impossible to report.

  The present invention solves the above-described conventional problems, and electrically connects a control unit that controls cooking by heating, an operation unit that includes input means including a power switch, and the control unit and the operation unit. A connection cable in which a plurality of signal lines are bundled, and when the disconnection detecting means detects that the connection between the control unit and the operation unit by the connection cable is abnormal, the control unit is connected even if the power switch is off. An object of the present invention is to provide a heating cooker that supplies power and enables notification of abnormality by a notification means.

  In order to solve the above problems, a heating cooker according to the present invention electrically connects a control unit that controls cooking, an operation unit that includes input means including a power switch, and the control unit and the operation unit. A connection cable in which a plurality of signal lines are bundled, and the control unit includes a disconnection detection unit that detects normality / abnormality of connection between the notification unit and the operation unit using the connection cable, and the power source When the switch is turned on, power is supplied to the control unit, and the disconnection detection means is connected to the control unit even when the power switch remains off when the connection between the control unit and the operation unit is abnormal. The heating cooker is configured to supply the power and enable the notification means to notify the abnormality.

  Thus, for example, when a malfunction occurs in the internal wiring of the heating cooker, even if the operation check of turning on the power switch is neglected after installing the cooker, the control unit is detected by the disconnection detection means that detects the connection failure. The control unit that is supplied with electric power and recognizes the disconnection detection signal from the disconnection detection unit can notify the abnormality by the notification unit.

  The cooking device of the present invention is used by the customer, for example, when the installation state in the device is insufficiently connected and the failure to confirm the operation to turn on the power switch is delayed, the discovery of the malfunction of the device is delayed. It can be determined that it cannot be used for the first time at the stage, and it can be prevented that the preparation of meals is delayed. Also, if the connection inside the device is not installed properly, it is not necessary to turn on the power switch. Since it is possible to detect an abnormality, it is possible to obtain an advantageous effect that a response such as repair or replacement can be quickly performed.

  1st invention is the connection which bundled the control part which controls heating cooking, the operation part provided with the input means containing a power switch, and the several signal line which electrically connects the said control part and the said operation part A cable, and the control unit includes a disconnection detection unit that detects normality / abnormality of connection between the notification unit and the operation unit via the connection cable, and the power source is turned on when the power switch is turned on. In addition to being supplied to the control unit, the disconnection detection means supplies the power to the control unit even when the power switch remains off when the connection between the control unit and the operation unit is abnormal, and the notification For example, when a malfunction occurs in the internal wiring of the cooking device, the failure to confirm the operation of turning on the power switch after installing the cooking device is enabled. Also, the control unit by disconnection detecting means detects a connection failure is powered, the control unit recognizing the disconnection detection signal from the disconnection detection means, can be notified of the abnormality by the notification unit.

  According to a second invention, in particular, in the first invention, the operation unit has a display means, and when the power switch is turned on, supply of power from the control unit is started by the connection cable, and the control unit The connection between the control unit and the operation unit is established by providing a configuration in which the supply of power to the operation unit is started by the disconnection detection means even when the power switch is off. In the event of an abnormality, it is possible to display and notify a connection abnormality by the display means even when the power switch is in an off state.

  In particular, according to a third invention, in the first or second invention, the connection cable includes a relay connector, and does not include the connection cable and does not function as the disconnection detecting means, for example, a cable such as a thermostat ( By connecting the connection line) to the relay connector without an intermediate joint, and bundling them together to prevent leakage of connections other than the control unit and operation unit, individual cable connection problems can be avoided. Eliminating and detecting abnormalities at the same time.

  In the fourth invention, in particular, the control unit according to any one of the first to third inventions determines that the disconnection detection signal input from the disconnection detection means has been exceeded for a predetermined time, and notifies the abnormality. Then, if it is less than the predetermined time, it is judged as misperception and normal operation is continued without notifying the abnormality, thereby preventing erroneous detection of disconnection due to disturbance noise, and heating is stopped when it is determined as disconnection. By avoiding the operation, it is possible to prevent a situation in which the operation is stopped during cooking that requires a predetermined time, such as automatic cooking, rice cooking, and stewed cooking, and the finish is not completed.

  In the fifth aspect of the invention, in particular, when the control unit according to any one of the first to fourth aspects of the invention detects another signal through the connection cable exceeding a predetermined time, the disconnection detection signal by the disconnection detection means is generated. By deciding that it is misidentified and continuing normal operation, as in the fourth aspect of the invention, it is possible to prevent erroneous detection of disconnection due to disturbance noise, and to avoid the operation that stops heating when the user can operate. By doing so, it is possible to prevent a situation in which the process is stopped during cooking that requires a predetermined time, such as automatic cooking, rice cooking, and stewed cooking, and the finish is not completed.

  Embodiments of the present invention will be described below with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a circuit block diagram of a heating cooker according to the first embodiment of the present invention.

  In the first embodiment, components having the same functions as those of the conventional example shown in FIG. The feature of this embodiment is that the controller 4 in FIG. 3 is additionally provided with a disconnection detecting means 45, a notifying means 46, a relay cable 10 and a thermostat 11 in the connection cable 9.

  The disconnection detection means 45 includes a power switch contact detection means 45a, a control power supply cutoff means 45b, a disconnection output means 45c, and a disconnection detection line 45d, and the notification means 46 is configured by a buzzer in the present embodiment.

  The connection cable 9 includes a relay connector 10, and the relay connector 10 includes a male relay connector 10 a connected to the control board 4, an operation unit 5, and a female relay connector 10 b connected to the thermostat 11.

  Also in FIG. 2, the external view of the heating cooker according to the first embodiment and the conventional example has the same configuration, and the detailed description is omitted by using the same functions, symbols, and names.

  About the induction heating cooking appliance which is a heating cooking appliance comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

  First, when the power switch 2 is turned on, the power LED is turned on as in the conventional example, the heating unit 3 is in the output stop state (initial mode), and the power holding switch 48 is not turned on even if the power switch 2 is turned off thereafter. Since the power is supplied to the control unit 4 because the power is on, the power LED is turned off, and if the temperature detection means 6 is 50 ° C. or higher, the high temperature LED blinks and an abnormality of the device is displayed. The unit is operating as necessary (holding mode).

  However, in the conventional example, there is a third stop mode immediately after installing the cooking device, that is, a state where the power switch 2 is turned off and the power LED is turned off and all the functions of the cooking device are stopped (standby mode). Although there existed, the standby mode does not exist in the first embodiment, and instead, the disconnection detection means 45 is in a state of always operating (hereinafter referred to as disconnection detection mode).

  Further, when the power switch 2 is turned on and the input unit 50 shifts to the cooking mode, the temperature detection unit 6 detects that the temperature detection unit 6 detects that the temperature of the top plate 8 is a high temperature of, for example, 50 ° C. or higher. The basic operation during cooking is the same as that of the conventional example, such as the operation of the high temperature LED for the unit 4 and the operation unit 5 and the operation of the control unit 3 (lighting).

  In the first embodiment, when the cooking device is installed and the AC power supply 1 is connected, it is in the disconnection detection mode until the power switch 2 is turned on, and the power switch 2 is turned off and turned on. After the transition to the holding mode in which the holding switch 40 continues to be turned on, the power holding switch 48 is turned on when a function such as a warning indicating that the top plate 8 by the high temperature LED is at a high temperature or an abnormality display becomes unnecessary. Will be turned off and will shift to the disconnection detection mode again.

  In the disconnection detection mode, the disconnection detection means 45 detects the contact of the power switch 2 by the power switch contact detection means 45a and the disconnection detection line 45d installed in the connection cable 9, and the connection cable 9 operates with the control unit 4. When the unit 5 is electrically connected, the disconnection detection line 45d is conducted, and the control power source shut-off means 45b operates to stop the output of the DC power source 47.

  Therefore, when the power switch 2 is in the off state and the connection cable 9 is normally connected, the control power shut-off means 45b operates normally and shuts off the power supply to the control unit 4. However, when the connection cable 9 is not electrically connected, the disconnection detection line 45d is cut off and recognized as a disconnection, and the control power supply shutoff means 45b does not operate normally, and the power is supplied to the control unit 4. Is supplied.

  When the output of the DC power supply 47 is supplied to the control unit 4, the control unit 4 confirms the contact state of the power switch 2 according to the detection contents of the power switch contact detection means 45a, and the power switch 2 is turned off. When power is supplied to the control unit 4, it is determined whether it is due to the disconnection detecting means 45 or the power holding switch 48. When the disconnection detecting means 45 is used, an abnormality is notified by the notifying means 46. (Claim 1).

  Further, when the power supply to the control unit 4 can be supplied after the interruption by the control power supply interruption unit 45b in the disconnection detection unit 45 is released, the disconnection from the disconnection output unit 45c in the disconnection detection unit 45 to the control unit 4 is disconnected. A detection signal is output.

  As a result, it is possible to identify the disconnection other than the information of the power switch contact detection means 45a. Therefore, even when the power switch 2 is on, the disconnection output means 45c can detect the disconnection, and the notification means. By providing 46 separately from the operation unit 5, it is possible to notify the abnormality without wiring the first display means 54 and the second display means.

  Further, the control power supply shut-off means 45b constituting the disconnection detection means 45 has a configuration that also serves to shut off the power supply from the DC power supply 47 to the operation unit 5, so that when the disconnection is detected, the control power supply means 45b. Since the output of the DC power supply 47 is also supplied to the operation unit 5, the first display means 54 can notify the abnormality and can easily recognize the abnormality. A cooking device can be provided (claim 2).

  Further, the connection cable 9 includes the relay connector 10 and is configured to directly connect the female-side relay connector 10a and the thermostat 11, so that even when a connection leakage between the control unit 4 and the thermostat 10 occurs, a disconnection detection signal is generated. As a recognition capability, it is possible to realize a safe cooking device that can discriminate between an off operation and a non-connection when the thermostat 10 becomes high temperature (Claim 3).

  In addition, when the control unit 4 receives the signal of the disconnection output means 45c and determines that the disconnection occurs, in consideration of erroneous detection of disconnection due to a problem such as fine contact, for example, when a disconnection detection signal within 1 second is received. Is not recognized as a disconnection because it is an erroneous detection, and when it receives a disconnection detection signal of 1 second or longer, it is recognized that it is a disconnection, and there is a possibility that the heating stop operation by the operation unit 5 may be disabled. By stopping the heating operation, it is possible to realize a cooking device that is safe and has few malfunctions.

  In addition, when the power switch 2 is turned on, if the connection cable 9 is disconnected, signals are not normally transmitted / received by the modulation means 42 and 52 and the demodulation means 43 and 53, and an abnormality occurs in communication. It is possible to recognize and notify that there is an abnormal connection state.

  Therefore, when a signal other than the disconnection detection signal such as a communication signal between the control unit 4 and the operation unit 5 is reliably detected over a predetermined time, the heating stop operation by the operation unit 5 is possible. Even if the disconnection detection signal is inputted, it is possible to realize a safe cooking device with less malfunctions by continuing the operation normally because it is erroneously recognized (Claim 5).

  In the first embodiment, the notification means is configured by a buzzer. Needless to say, however, if the notification means is configured using a speaker or the like and the notification is made by voice, it is easier to determine the abnormality.

  The present invention provides a power supply when, for example, a control cable that performs heating control in a manufacturing process of a heating cooker and a connection cable that connects an operation unit that operates equipment are installed in a state where a problem such as half insertion occurs. Since the failure can be recognized and repaired without turning on the switch, it can also be applied to applications such as a control device in which the control unit and the operation unit are electrically connected by a cable.

The circuit block diagram of the heating cooker in Embodiment 1 of this invention Embodiment 1 of the present invention, external view of a cooking device in a conventional example Circuit block diagram of cooking device in conventional example

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 AC power supply 2 Power switch 3 Heating part 4 Control part 5 Operation part 6 Temperature detection means 7 Load pan 8 Top plate 9 Connection cable 10 Relay connector 10a Male type relay connector 10b Female type relay connector 11 Thermostat 30 Rectifier 31 Heating coil 32 Switching Means 33 Inverter circuit 41 Control means 42, 52 Modulation means 43, 53 Demodulation means 44 Second display means 45 Disconnection detection means 45a Power switch contact detection means 45b Control power supply cutoff means 45c Disconnection output means 45d Disconnection detection line 46 Notification means 47 DC power supply 48 Power supply holding switch 50 Input means 51 Heating setting means 54 First display means

Claims (5)

A control unit that controls cooking, an operation unit that includes an input unit including a power switch, and a connection cable that bundles a plurality of signal lines that electrically connect the control unit and the operation unit, The control unit includes a disconnection detection unit that detects normality / abnormality of connection between the notification unit and the operation unit using the connection cable, and power is supplied to the control unit when the power switch is turned on. At the same time, the disconnection detecting means supplies the power to the control section even when the power switch is in an off state when the connection between the control section and the operation section is abnormal, so that the notification section can notify the abnormality. A heating cooker. When the operation unit has a display means and the power switch is turned on, supply of power from the control unit to the operation unit is started by a connection cable, and when the connection with the control unit is abnormal The power supply to the operation unit is started by the disconnection detecting means even when the power switch is off, and the power switch is off when the connection between the control unit and the operation unit is abnormal The cooking device according to claim 1, wherein it is possible to display and notify a connection abnormality by the display means even if it remains. The connection cable is provided with a relay connector, and other cables that do not include the connection cable and whose disconnection detecting means does not function are bundled together in the relay connector, thereby preventing connection leakage other than the control unit and the operation unit. Item 3. A cooking device according to item 1 or 2. If the disconnection detection signal input from the disconnection detection means continues beyond a predetermined time, the control unit determines that the disconnection has occurred and notifies the abnormality, and if it is less than the predetermined time, determines that it is a misidentification and does not notify the abnormality. The cooking device according to any one of claims 1 to 3, wherein the normal operation is continued. The control unit determines that the disconnection detection signal from the disconnection detection means is erroneously recognized and continues normal operation when another signal via the connection cable is detected beyond a predetermined time. The heating cooker according to item.

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