JP6558926B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device including a capacitance type operation unit.

  2. Description of the Related Art Conventionally, it is known that a cooking device includes an operation unit including a capacitive touch key on a top plate. In the capacitance type operation unit, it is determined whether or not the operation unit is operated based on a change in capacitance caused by an object touching the electrode. For this reason, the operation unit may react when the blow-off attached to the operation unit is wiped or lightly touched by mistake, and a heating operation not intended by the user may be performed. Therefore, Patent Document 1 proposes a method for suppressing malfunction caused by an operation not intended by the user. Specifically, in the cooking device of Patent Document 1, a capacitance-type cancel electrode is provided around the operation unit, and the operation is limited when it is determined that the top plate near the cancel electrode is pressed. It has become.

Japanese Patent No. 5117410 (refer to claim 1)

  Here, as described in Patent Document 1, when the erroneous operation is determined based on the cancel electrode, the operation by the operation unit is limited even when, for example, water droplets due to splashing at the time of boiling water adhere to the cancel electrode. Therefore, the user's usability becomes worse.

  The present invention has been made against the background of the above problems, and an object of the present invention is to provide a heating cooker that can suppress the erroneous operation of the capacitance type operation unit and improve the usability.

A heating cooker according to the present invention includes a heating unit that heats an object to be heated, an electrostatic capacity type operation unit that is operated to control the heating unit, and a lock state that disables an operation on the operation unit, An operation control unit that switches between a lock release state that accepts an operation on the operation unit and a lock release unit that is operated to release the lock state, and the operation control unit is normally locked including during heating by the heating unit When the unlocking unit is operated, the locked state is switched to the unlocked state, and when the unlocking time has elapsed since the lock state was switched to the unlocked state, the unlocked state is switched to the locked state. , release time, Ru is set according to the cooking mode selected through the operation unit.

  According to the cooking device of the present invention, it is normally in a locked state, and when the unlocking unit is operated, by switching from the locked state to the unlocked state, it is possible to suppress erroneous operation of the capacitive operation unit. Usability can be improved.

3 is a perspective view of a heating cooker according to Embodiment 1. FIG. 3 is a plan view of the heating cooker in Embodiment 1. FIG. It is a figure which shows the main structures and function parts of the heating cooker in Embodiment 1. FIG. 6 is a diagram illustrating a display example of a display unit at the time of unlocking in the first embodiment. FIG. It is a flowchart which shows an example of the heating start process in the heating cooker of Embodiment 1. It is a flowchart which shows another example of the heating start process in the heating cooker of Embodiment 1. It is a top view of the heating cooker in Embodiment 2. FIG. It is a flowchart which shows an example of the heating start process in the heating cooker of Embodiment 2. It is a top view of the heating cooker in Embodiment 3. FIG. It is a top view of the heating cooker in Embodiment 4. It is a flowchart which shows an example of the operation | movement in the heating cooker of Embodiment 4 during a heating. It is a flowchart which shows the blow-off detection process in the heating cooker of Embodiment 5. It is a perspective view of the heating cooker in a modification. It is a perspective view of the heating cooker in another modification.

  Hereinafter, embodiments of the heating cooker of the present invention will be described with reference to the drawings. Note that the detailed structure and overlapping or similar descriptions are appropriately simplified or omitted. In the following embodiments, an induction heating cooker will be described as an example of a heating cooker.

Embodiment 1 FIG.
(Configuration of cooking device)
FIG. 1 is a perspective view of heating cooker 100 according to Embodiment 1 of the present invention, and FIG. 2 is a plan view of heating cooker 100. As shown in FIG. 1 and FIG. 2, the heating cooker 100 includes a main body 1 and a top plate 2 disposed on the upper surface of the main body 1 and formed of heat-resistant glass. Heating ports 14 are provided at three positions on the left side, the right side, and the center side of the top plate 2.

  On the front side of the top plate 2, a first operation unit 11 on which a setting operation such as a cooking mode or a cooking temperature is performed is arranged corresponding to each heating port 14. The first operation unit 11 includes a plurality of capacitive touch keys. Further, in the vicinity of the first operation unit 11 on the top plate 2, a display unit 15 made of, for example, a liquid crystal display is disposed. The display unit 15 displays information relating to, for example, the heating power and progress status such as “during preheating” and “reasonable temperature”, the contents of the set cooking mode, and the like. Further, on the back side of the top plate 2, an intake / exhaust port 12 for performing intake to the inside of the main body 1 or exhaust from the inside is disposed.

  In addition, on the near side of the top plate 2 and in the vicinity of the first operation unit 11, the lock release unit 20 is disposed. The lock release unit 20 is a capacitive touch key. The lock release unit 20 is operated to release the locked state of the first operation unit 11. The lock release unit 20 is disposed at a position farther from the center of the heating port 14 than the first operation unit 11. In this way, by disposing the lock release unit 20 away from the heating source (heating port 14) than the first operation unit 11, it becomes difficult for the spray or blown from the container 10 to reach, and the lock due to the splash or blown down is achieved. An erroneous operation of the release unit 20 can be suppressed. Further, a lock state display unit 21 is disposed adjacent to the lock release unit 20. The lock state display unit 21 is a light emitter such as an LED, and the display is changed according to the lock state of the first operation unit 11.

  A grill portion 16 is disposed on the front side of the main body 1. Next to the grill portion 16, a second operation portion 17 is provided for performing setting operations such as heating power for the grill portion 16 and each heating port 14. The second operation unit 17 includes a mechanical power switch 17 a for turning the power of the heating cooker 100 on and off, a dial switch for adjusting the heating power of each heating port 14, and the like.

  An audio output unit 18 is provided on the front side of the main body 1. The audio output unit 18 is a speaker, for example. The audio output unit 18 outputs a warning sound related to the cooking process or a warning sound related to the abnormality of the cooking device 100 with a voice such as a human voice or a buzzer.

  FIG. 3 is a diagram illustrating the main configuration and functional units of the heating cooker 100. In FIG. 3, only the configuration of the heating cooker 100 corresponding to one heating port 14 is illustrated, and the container 10 in which an object to be heated such as water or food is accommodated is also illustrated. As shown in FIG. 3, the heating unit 6 is disposed below the heating port 14 provided in the top plate 2 of the heating cooker 100. The heating unit 6 is, for example, an induction heating coil, and has a double ring shape including a substantially annular inner heating coil 6a and a substantially annular outer heating coil 6b provided on the outside thereof. An eddy current is generated in the container 10 placed on the top 2 by flowing a high-frequency current through the heating unit 6, and the container 10 generates heat due to the generated eddy current and the resistance of the container 10 itself, thereby realizing cooking by heating. To do. The heating unit 6 may be other heating means such as an electric heater.

  A top plate temperature sensor 28 such as a thermistor is disposed on the surface of the back surface of the top plate 2 facing the heating unit 6 so as to contact the back surface of the top plate 2. The top plate temperature sensor 28 detects heat transmitted from the container 10 to the top plate 2. The top panel temperature detected by the top panel temperature sensor 28 is output to the top panel temperature detector 280 and converted into a temperature by the top panel temperature detector 280.

  Further, inside the main body 1, as a functional unit that controls each component, a display control unit 31 that controls the display unit 15 and the lock state display unit 21, a first operation unit 11, a second operation unit 17, and a lock. An operation control unit 32 that generates a control command based on an operation on the release unit 20, a storage unit 33 that stores data and a program necessary for controlling the cooking device 100, a drive unit 34 that controls the high-frequency inverter 27, and a voice An audio output control unit 35 that controls audio output by the output unit 18 and a control unit 30 that performs overall control of each functional unit are included. Each of the above sections is configured by using hardware such as a circuit device that realizes the function, or is configured by an arithmetic device such as a microcomputer or a CPU and software executed thereon.

(Operation of heating cooker 100)
Next, the heating operation of the heating cooker 100 in the present embodiment will be described. When the user performs an operation for starting heating via the first operation unit 11 or the second operation unit 17, the operation control unit 32 generates a control command for starting heating and outputs the control command to the control unit 30. Based on the control command from the operation control unit 32, the control unit 30 transmits a high frequency power command (thermal power information) to the drive unit 34 according to the cooking mode, cooking temperature, or thermal power set by the user. The drive unit 34 controls the high frequency inverter 27 based on a command from the control unit 30 to adjust the high frequency current flowing through the heating unit 6. In addition, the control unit 30 has an automatic cooking mode in which a target temperature is set, and when an operation for selecting the automatic cooking mode is performed via the first operation unit 11 or the second operation unit 17, the top plate Heating control is performed so that the temperature detected by the temperature sensor 28 becomes the target temperature.

  The first operation unit 11 of the present embodiment is configured by a capacitive touch key. For this reason, when the user wipes the first operation unit 11 with a cloth, or when splashes such as water droplets adhere to the first operation unit 11, the reaction may occur erroneously. In such a case, the start of heating or the increase of thermal power unintended by the user occurs. Therefore, the operation control unit 32 according to the present embodiment is normally in a locked state in which the operation of the first operation unit 11 is invalidated, and when the unlocking unit 20 is operated, the operation control unit 32 switches to the unlocked state and performs the first operation. An operation from the operation unit 11 is accepted. When a capacitance type operation unit is provided in addition to the first operation unit 11, the operation control unit 32 is normally in a locked state in which an operation by a capacitance type operation unit other than the lock release unit 20 is invalidated. Then, when the lock release unit 20 is operated, control is performed to switch to the lock release state and accept operations from all the operation units.

  Thereby, it can suppress that the heating operation which a user does not intend by the misoperation of the 1st operation part 11 is implemented. In addition, by setting the first operation unit 11 in the locked state even during heating, for example, even if water droplets due to droplets adhere to the first operation unit 11 before boiling during boiling, it is contrary to the intention of the user. Thus, it is possible to suppress the thermal power from being lowered or raised without permission. Furthermore, when switching to the unlocked state, an arbitrary operation such as a short press or a long press intended by the user can be performed, so that the usability can be improved.

  Note that “invalidate the operation of the first operation unit 11” in the locked state is a state where the first operation unit 11 is energized, and the operation control unit 32 can detect the operation of the first operation unit 11. In other words, the detected operation is invalidated and no control command is output to the control unit 30. In another embodiment, the operation control unit 32 may stop energization of the first operation unit 11 and not detect the operation itself in the locked state.

  Further, the operation control unit 32 invalidates the operation of the first operation unit 11 when the unlocking unit 20 and the first operation unit 11 are operated at the same time in the locked state, that is, when the operation is turned on at the same time. To do. In the case where the unlocking unit 20 is a capacitance type touch key, if there is a remaining blow on the unlocking unit 20, the unlocking unit 20 It becomes the operated state. In this state, when the 1st operation part 11 is wiped with a cloth etc., the heating operation contrary to a user's intention will be implemented. Then, when the 1st operation part 11 is operated with the unlocking | release part 20 operated, the heating operation | movement contrary to a user's intention can be suppressed by invalidating operation. .

  Further, the operation control unit 32 invalidates the operation when any two or more keys of the first operation unit 11 are simultaneously operated during unlocking. Thereby, it is possible to prevent an erroneous operation when a blow-off occurs on any key during unlocking.

  Further, after switching from the locked state to the unlocked state, the operation control unit 32 switches to the locked state again when the predetermined release time ta has elapsed, and invalidates the subsequent operation of the first operating unit 11. Thus, erroneous operation can be suppressed by limiting the release time ta.

  The release time ta for releasing the locked state may be a predetermined fixed time, or may be a time set for each cooking mode selected via the first operation unit 11. For example, the operation control unit 32 may set the release time ta longer in the cooking mode where the operation hierarchy is deep. Specifically, for example, when the grill mode where it is necessary to set the heating power and the time is operated, the release time ta is set longer than when the simple heating power change is operated. Thereby, it can prevent switching to a locked state in the middle of operation. Further, when the release time ta is set for each cooking mode, the operation control unit 32 sets the release time ta as a provisional time until the cooking mode is selected, and for each cooking mode when the cooking mode is selected. Change to the set release time ta. These release times ta are stored in the storage unit 33.

  Further, the operation control unit 32 may extend the release time ta when the first operation unit 11 is newly operated within the release time ta. Thereby, it can prevent switching to a locked state in the middle of operation.

  Moreover, the use frequency of cooking mode is memorize | stored in the memory | storage part 33, and the operation control part 32 may set cancellation | release time ta according to the use frequency of the cooking mode operated. Specifically, for example, the release time ta when the cooking mode with low use frequency is selected is set longer than the release time ta when the cooking mode with high use frequency is selected. Thereby, even if it takes time to operate in the unfamiliar cooking mode, it can be prevented from being switched to the locked state during the operation.

  Furthermore, you may set cancellation | release time ta according to the skill level regarding operation of the user's heating cooker 100. FIG. Specifically, the storage unit 33 stores the proficiency level divided into at least two levels and the release time ta at each proficiency level. The release time ta is set longer as the proficiency level is lower. Then, the operation control unit 32 measures the time required for the user's operation, and determines the proficiency level from the time required for the operation. Then, the operation control unit 32 sets a release time ta corresponding to the determined proficiency level. As a result, a beginner with a low level of proficiency can set a long time for accepting an operation, and therefore, even if the operation takes a long time, it can be prevented from being switched to a locked state during the operation.

  The operation control unit 32 may switch to the locked state again when it is determined that the operation by the first operating unit 11 has ended after switching to the unlocked state. Specifically, the operation control unit 32 determines that the operation by the first operation unit 11 has ended when a predetermined time has elapsed since the first operation unit 11 was last operated. Alternatively, when a human sensor is provided and no more people are detected, it is determined that the operation by the first operation unit 11 has ended. Thereby, erroneous operation can be suppressed by releasing the lock only when the first operation unit 11 is actually operated.

  Moreover, the display control part 31 lights the lock state display part 21 shown in FIG. 2 red, for example, when the lock release part 20 is operated and it will be in a lock release state. As a result, the user can recognize that the operation is possible. In addition, when the lock state is switched, the lock state display unit 21 is turned off to make the user recognize that it is in the lock state.

  In addition, the display of the lock state display part 21 is not limited to the above, What is necessary is just to be able to identify a lock state and a lock release state. For example, both the unlocked state and the locked state may be turned on, and the color may be changed between the unlocked state and the locked state, or may be blinked while the lock is released. Further, when the remaining time of the release time ta decreases, the blinking interval may be shortened.

  Moreover, the lock state display part 21 is not limited to what is shown in FIG. For example, a display unit may be provided in the lock release unit 20 itself, and the display on the display unit may be different between the locked state and the unlocked state. Alternatively, the liquid crystal display capable of displaying characters by causing the lock state display unit 21 to emit light from the back side, and the light emission color of the back side in the locked state and the unlocked state are different, or the back side light emission in the unlocked state. May be blinked. Further, when the remaining time of the release time ta decreases, the blinking interval may be shortened.

  Further, in the locked state, the lock release unit 20 and the first operation unit 11 may be displayed in an identifiable manner. For example, in the locked state, only the lock release unit 20 may be lit. Thereby, it can be recognized where the user presses to release the locked state. When unlocking, the display of the key that can accept the next operation and the key that cannot be accepted may be made different.

  Further, the audio output control unit 35 may output a sound for notifying that the lock output state has been obtained from the audio output unit 18. Alternatively, the audio output control unit 35 may output different notification sounds from the audio output unit 18 both when unlocking and when switching the lock state.

  Furthermore, the display control unit 31 may display the release time ta when the lock is released on the display unit 15 as a number, and may display a countdown of the release time ta after the lock is released. FIG. 4 is a diagram illustrating a display example of the display unit 15 at the time of unlocking. As shown in FIG. 4, when the lock release unit 20 is operated, the release time ta is displayed on the display unit 15. Thereafter, the release time ta is counted down, and is displayed blinking when the remaining time is reduced. As a result, the user can recognize the remaining time of the release time ta, and can prompt an operation within the release time ta. Further, when the lock is released, the release time ta may be notified from the voice output unit 18 by voice.

  Moreover, when the 1st operation part 11 is operated in the locked state, the display control part 31 or the audio | voice output control part 35 may alert | report that an operation is invalid with an audio | voice, a display, or both. . Thereby, it is possible to make the user recognize that it is in a locked state in which no operation is accepted. At this time, the operation control unit 32 may change the sensitivity of the first operation unit 11 between the locked state and the unlocked state. For example, by lowering the sensitivity in the locked state and increasing the sensitivity in the unlocked state, the frequency of erroneous operation detection in the locked state is reduced and the response of the operation by the user in the unlocked state is reduced. Can be better. Thereby, the frequency | count of the alerting | reporting from the display part 15 or the audio | voice output part 18 by the misoperation in the locked state can also be reduced.

  Further, the operation control unit 32 may change the sensitivity of the first operation unit 11 during heating and when heating is stopped. For example, when the heating is stopped, the sensitivity is lower than that during the heating, so that it is possible to reduce false detections when water droplets due to the droplets being heated adhere to the first operation unit 11.

  Further, the operation control unit 32 may switch to the locked state when the unlocking unit 20 is operated again during unlocking. As a result, even if the user accidentally releases the lock, the user can immediately switch to the locked state without waiting for the release time ta to elapse. In addition, the display control unit 31 or the audio output control unit 35 informs the display unit 15 or the audio output unit 18 that the lock can be switched to the locked state by operating the unlock unit 20 again during unlocking. Also good.

  Next, the flow of the heating start process in the heating cooker 100 of this Embodiment is demonstrated. FIG. 5 is a flowchart illustrating an example of a heating start process in the heating cooker 100 according to the present embodiment. This process is executed by each functional unit including the control unit 30. This process is started when the power switch 17a is turned on (S1). At this time, the first operation unit 11 is locked (S2). Since the power switch 17a of the present embodiment is a mechanical switch, the power switch 17a is not turned ON by an erroneous operation due to blown down or the like, and can be operated according to the user's intention. Therefore, the troublesome operation of the unlocking unit 20 can be reduced by enabling the power switch 17a to be operated without unlocking.

  Then, it is determined whether or not the unlocking unit 20 has been operated (S3). Here, when the unlocking unit 20 is not operated (S3: NO), the locked state is maintained until the unlocking unit 20 is operated. When the lock release unit 20 is operated (S3: YES), the lock state is switched to the lock release state (S4), and measurement of elapsed time is started (S5). Then, it is determined whether or not a heating start operation has been performed (S6). Here, when the operation to start heating is not performed (S6: NO), it is determined whether or not the release time ta has elapsed (S7). If the release time ta has not elapsed (S7: NO), the process returns to step S6, and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S7: YES), the measurement time is reset (S8), the process returns to step S2 and is switched to the locked state (S2). In this case, the power supply is turned on and the lock is released, but the heating returns to the locked state without starting.

  On the other hand, when the heating start operation is performed (S6: YES), the high frequency inverter 27 is controlled by the drive unit 34, and heating by the heating unit 6 is started (S9). Then, it is determined whether or not the release time ta has passed (S10). If the release time ta has not passed (S10: NO), the process returns to step S6, and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S10: YES), the measurement time is reset (S11), the lock state is switched (S12), and this process is terminated.

  Next, FIG. 6 is a flowchart which shows another example of the heating start process in the heating cooker 100 of this Embodiment. In this process, steps S1 to S5 similar to those in FIG. 5 are performed. And it is judged whether the 1st operation part 11 was operated (S21). Here, when the first operation unit 11 is not operated (S21: NO), it is determined whether or not the release time ta has passed (S22). If the release time ta has not elapsed (S22: NO), the process returns to step S21 and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S22: YES), the measurement time is reset (S23), the process returns to step S2 and is switched to the locked state (S2). In this case, although the power is turned on and the lock is released, the first operation unit 11 returns to the locked state without being operated.

  On the other hand, when the 1st operation part 11 is operated (S21: YES), measurement time is reset and measurement of elapsed time is started again (S24). As a result, the release time ta is extended. And it is judged whether it is heating start operation (S25), and when it is not heating start operation (S25: NO), it returns to step S21 and the subsequent process is repeated. On the other hand, when it is a heating start operation (S25: YES), the measurement time is reset (S26) and switched to the locked state (S27). And the high frequency inverter 27 is controlled by the drive part 34, the heating by the heating part 6 is started (S28), and this process is complete | finished.

  As described above, according to the present embodiment, an operation of the first operation unit 11 is accepted only when the unlocking unit 20 is operated, so that the user intends due to an erroneous operation of the first operation unit 11. It can suppress that the heating operation which is not performed is implemented. Furthermore, when the lock is released, the operation intended by the user, such as a short press or a long press, can be freely performed, so that the usability can be improved.

  The operation control unit 32 switches from the unlocked state to the locked state when it is determined that the operation on the first operating unit 11 has ended, or when the release time ta has elapsed since switching from the locked state to the unlocked state. . Thereby, the erroneous operation of the 1st operation part 11 can be suppressed.

  Further, the release time ta may be set according to the cooking mode selected via the first operation unit 11. In the case where the level of operation in the cooking mode is deep, it is possible to prevent switching to the locked state during the operation by setting the release time ta long.

  Moreover, when the use frequency of the cooking mode selected via the 1st operation part 11 is low, the cancellation | release time ta is compared with the case where the use frequency of the cooking mode selected via the 1st operation part 11 is high, It may be set longer. Thereby, even if it takes time to operate in the unfamiliar cooking mode, it can be prevented from being switched to the locked state during the operation.

  Further, the operation control unit 32 determines the user's proficiency regarding the operation of the first operation unit 11 based on the operation time when selected via the first operation unit 11, and the release time ta. May be set longer when the proficiency level is low than when the proficiency level is high. As a result, a beginner with a low level of proficiency can set a long time for accepting an operation, and therefore, even if the operation takes a long time, it can be prevented from being switched to a locked state during the operation.

  The unlocking unit 20 is a capacitive touch key, and the unlocking unit 20 is arranged farther from the heating unit 6 than the first operation unit 11. Thereby, it becomes difficult for the splash release or spill from the container 10 to reach the lock release unit 20, and an erroneous operation of the lock release unit 20 due to the splash or spill can be suppressed.

  The operation control unit 32 may switch to the locked state when the lock releasing unit 20 is operated in the unlocked state. As a result, even if the user accidentally releases the lock, the user can immediately switch to the locked state.

  Furthermore, you may further provide the lock state display part 21 which displays a lock state and a lock release state so that identification is possible. As a result, the user can easily recognize the current locked state.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. The cooking device 100A according to the second embodiment is different from the first embodiment in that the power switch 17a is a capacitive touch key. About the other structure of 100 A of heating cookers, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 7 is a plan view of heating cooker 100A in the present embodiment. As shown in FIG. 7, a power switch 17 a composed of a capacitive touch key is disposed at the front end of the cooking device 100 </ b> A on the top plate 2. Further, the power switch 17 a is disposed on the opposite side of the lock release unit 20 across the center line of the heating port 14. Here, when the unlocking unit 20 and the power switch 17a are arranged in a close position, when the top 2 is wiped with a wet cloth, or when the blow-off remains, the unlocking unit 20 and the power switch The switch 17a reacts and the power may be turned on or off against the user's intention. By disposing the lock release unit 20 and the power switch 17a apart from each other, such an erroneous operation can be suppressed.

  Further, the operation control unit 32 invalidates the power operation when the lock release unit 20 and the power switch 17a are operated simultaneously. When the unlocking unit 20 is a capacitive touch key, if there is any remaining blow on the unlocking unit 20, the unlocking unit 20 is operated even though the user has no intention of unlocking. It becomes a state. In this state, when the power switch 17a is wiped with a cloth, a power operation contrary to the user's intention is performed. Therefore, when the power switch 17a is operated while the lock release unit 20 is operated, the power operation contrary to the user's intention can be suppressed by invalidating the operation.

  Next, the flow of the heating start process in the heating cooker 100A of the present embodiment will be described. FIG. 8 is a flowchart showing an example of the heating start process in the heating cooker 100A of the present embodiment. In FIG. 8, the same processes as those in the first embodiment shown in FIG. This process is executed by each functional unit including the control unit 30. At the start of this process, the first operation unit 11 and the power switch 17a are locked (S101). Since the power switch 17a of the present embodiment is a capacitive switch, the operation of the power switch 17a is disabled until the lock release unit 20 is operated in order to prevent erroneous detection of the power switch 17a.

  Then, it is determined whether or not the unlocking unit 20 has been operated (S102). Here, when the unlocking unit 20 is not operated (S102: NO), the locked state is maintained until the unlocking unit 20 is operated. When the unlocking unit 20 is operated (S012: YES), the operation control unit 32 is switched from the locked state to the unlocked state (S103), and elapsed time measurement is started (S104). Then, it is determined whether or not the power switch 17a is turned on (S105). Here, when the power switch 17a is not turned on (S105: NO), it is determined whether or not the release time ta has passed (S106). If the release time ta has not elapsed (S106: NO), the process returns to step S105, and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S106: YES), the measurement time is reset (S107), the process returns to step S101, and is switched to the locked state (S101). In this case, although the lock is released, the power returns to the locked state without being turned on.

  On the other hand, when the power switch 17a is turned on (S105: YES), the heating cooker 100A is turned on (S108), and it is determined whether a heating start operation has been performed (S6). Here, when the operation to start heating is not performed (S6: NO), it is determined whether or not the release time ta has elapsed (S7). If the release time ta has not elapsed (S7: NO), the process returns to step S6, and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S7: YES), the measurement time is reset (S8), the process returns to step S101, and is switched to the locked state (S101). In this case, although the lock is released and the power is turned on, the heating operation is not started and the locked state is restored.

  On the other hand, when the heating start operation is performed (S6: YES), the high frequency inverter 27 is controlled by the drive unit 34, and heating by the heating unit 6 is started (S9). Then, it is determined whether or not the release time ta has passed (S10). If the release time ta has not passed (S10: NO), the process returns to step S6, and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S10: YES), the measurement time is reset (S11), the lock state is switched (S12), and this process is terminated.

  As described above, according to the present embodiment, the operation of the power switch 17a is also invalidated in the locked state, and the operation of the power switch 17a is accepted only when the lock release unit 20 is operated. In addition to the above effect, it is possible to prevent the power source from being turned on or off against the user's intention due to an erroneous operation of the power switch 17a.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. The heating cooker 100B of the third embodiment is different from the first embodiment in that it includes a plurality of lock release units 20. About the other structure of the heating cooker 100B, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 9 is a plan view of heating cooker 100B in the present embodiment. As shown in FIG. 9, on the top plate 2 of the heating cooker 100B, there are provided first operating sections 11 corresponding to the three heating ports 14, respectively. And in the vicinity of each 1st operation part 11, lock release part 20a, 20b, 20c and the lock | rock state display part 21a, 21b, 21c are each arrange | positioned. Each first operation unit 11 is individually unlocked by each unlocking unit 20a, 20b or 20c. In this way, by providing the lock release unit 20 near the first operation unit 11 to be used, the user can intuitively know which lock release unit corresponds to which first operation unit 11. It becomes easy to operate.

  In addition, each of the lock release units 20 a, 20 b, and 20 c is disposed at a position farther from the center of the heating port 14 than the first operation unit 11. In this way, by disposing the lock release unit 20 away from the heating source (heating port 14) than the first operation unit 11, it becomes difficult for the spray or blown from the container 10 to reach, and the lock due to the splash or blown down is achieved. An erroneous operation of the release unit 20 can be suppressed.

  As described above, according to the present embodiment, the lock release units 20a, 20b, and 20c corresponding to the first operation units 11 are provided, and the lock state and the lock release state of each first operation unit 11 are individually switched. Thus, in addition to the effects of the first embodiment, the usability for the user can be further improved.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described. The cooking device 100C according to the fourth embodiment further includes an ambient temperature sensor 29 that detects a top plate temperature around the lock release unit 20, and the operation control unit 32 is locked based on the detected temperature of the ambient temperature sensor 29. This is different from the first embodiment in that switching is performed. About the other structure of the heating cooker 100C, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  FIG. 10 is a plan view of heating cooker 100C in the present embodiment. As shown in FIG. 10, an ambient temperature sensor 29 that detects the temperature of the top plate 2 around the lock release unit 20 is provided in the vicinity of the lock release unit 20 on the top plate 2 of the heating cooker 100 </ b> C. . The ambient temperature sensor 29 is an infrared temperature sensor that detects infrared rays emitted from the top plate 2 and measures the temperature of the top plate 2. Here, a contact-type temperature sensor such as the top-plate temperature sensor 28 may be used as the ambient temperature sensor 29. However, in the case of the contact-type temperature sensor, the reaction rate is slow, so that the high-temperature blown-off is detected. Even if it adheres to 2, it takes time to reach the back surface of the top plate 2. And in the meantime, it is radiated and there is a possibility that a high temperature state cannot be detected. On the other hand, the high temperature state on the top plate 2 can be quickly detected by using an infrared temperature sensor that reacts quickly. Further, the ambient temperature sensor 29 is disposed closer to the heating port 14 than the lock release unit 20. Thereby, it is possible to detect the blow-off more quickly.

  When the temperature T detected by the ambient temperature sensor 29 is equal to or higher than the predetermined temperature T1, the operation control unit 32 of the present embodiment does not switch to the unlocked state even when the unlocking unit 20 is operated. . The predetermined temperature T1 is an arbitrary temperature of 50 ° C. or higher. For example, setting the temperature to 50 ° C. can prevent burns. When the detected temperature T detected by the ambient temperature sensor 29 is equal to or higher than the predetermined temperature T1, it is possible that the top plate 2 has been blown down or the container 10 is placed out of position. Therefore, by determining that the operation of the lock release unit 20 when the detected temperature T detected by the ambient temperature sensor 29 is equal to or higher than the predetermined temperature T1 is an erroneous operation due to blow-off, it is possible to suppress a heating operation that is not intended by the user. Furthermore, since the ambient temperature sensor 29 that detects the presence or absence of blow-off has only to be provided for the lock release unit 20, the number of parts is larger than when the sensor is provided for each key of the first operation unit 11. It also leads to reduction of product cost.

  In addition, regardless of the locked state of the first operation unit 11, the control unit 30, when the detected temperature T of the ambient temperature sensor 29 during the heating continues for a predetermined allowable time tp or longer, The heating unit 6 may be controlled to limit or stop the heating power. In this case, it is possible to operate more safely by determining that the blowing has continued or that the container 10 has been displaced and the heating power is limited or stopped.

  FIG. 11 is a flowchart showing an example of an operation during heating in the heating cooker 100C of the present embodiment. This process is executed by each functional unit including the control unit 30. In this process, first, it is determined whether or not the unlocking unit 20 has been operated (S201). Here, when the unlocking unit 20 is not operated (S201: NO), the locked state is maintained until the unlocking unit 20 is operated. When the lock release unit 20 is operated (S201: YES), it is determined whether or not the detected temperature T of the ambient temperature sensor 29 is equal to or higher than a predetermined temperature T1 (S202).

  Here, when the detected temperature T of the ambient temperature sensor 29 is equal to or higher than the predetermined temperature T1 (S202: YES), it is notified by the display unit 15 or the audio output unit 18 that the blowout is zero or the container 10 is displaced. (S203). Then, it is determined whether or not the allowable time tp has passed (S204). If the allowable time tp has not passed (S204: NO), the process returns to step S202, and the subsequent processing is repeated. On the other hand, when the allowable time tp has passed (S204: YES), the heating is stopped (S205), and this process is terminated.

  When the detected temperature T of the ambient temperature sensor 29 is lower than the predetermined temperature T1 (S202: NO), the first operation unit 11 is switched from the locked state to the unlocked state (S206), and elapsed time measurement is started. (S207). And it is judged whether operation of the 1st operation part 11 was made (S208). Here, when the operation is performed (S208: YES), the operation is accepted (S209), and the heating control is performed according to the operation. Further, after receiving the operation in step S209 or when the operation of the first operation unit 11 is not performed (S208: NO), it is determined whether or not the release time ta has passed (S210). If the release time ta has not elapsed (S210: NO), the process returns to step S208, and the subsequent processing is repeated. On the other hand, when the release time ta has elapsed (S210: YES), the measurement time is reset (S211), the lock state is switched (S212), and this process is terminated.

  As described above, according to the present embodiment, by determining whether or not the unlocking unit 20 is erroneously operated by the ambient temperature sensor 29, in addition to the effects of the first embodiment, the erroneous operation of the unlocking unit 20 is performed. Can be suppressed. As a result, it is possible to further suppress a heating operation that is not intended by the user due to an erroneous operation of the first operation unit 11.

Embodiment 5. FIG.
Next, a fifth embodiment of the present invention will be described. The heating cooker 100 according to the fifth embodiment is different from the first embodiment in that the presence or absence of blown-out is determined according to the operation time of the first operation unit 11 in the locked state. About the structure of the heating cooker 100, it is the same as that of Embodiment 1, and attaches | subjects the same code | symbol.

  The operation control unit 32 of the present embodiment measures the operation time of the first operation unit 11 when the first operation unit 11 is operated in the locked state. Here, the operation time is a time during which the first operation unit 11 is continuously pressed (that is, in an ON state). When the operation time is less than the predetermined allowable time tp, it is determined that the first operation unit 11 has been erroneously operated, and when the operation time is equal to or longer than the allowable time tp, it is determined that the blow-down has occurred. The display control unit 31 or the audio output control unit 35 notifies the determination result of the operation control unit 32 by audio and / or display. Specifically, if the operation time is equal to or longer than the allowable time tp, a warning such as “There is a possibility that the pan has been blown down. Prompt. On the other hand, if the operation time is less than the permissible time tp, use a voice or display for notification such as “You cannot operate because it is locked. Call attention.

  Moreover, the control part 30 controls the heating part 6, and suppresses or stops a thermal power, when the operation control part 32 judges that blowing is zero. Thereby, it can suppress that heating is continued with blowing down. Further, when the thermal power is suppressed or stopped, the sound may be notified by sound and / or display according to the state. Specifically, when the thermal power is suppressed, a notification such as "The thermal power has been lowered because a blow-out has been detected" is given by voice or display to make the user recognize. In addition, when the thermal power is stopped, a notification such as “The thermal power has been stopped because a blow-off has been detected.” Is given by voice or display to make the user recognize.

  Further, even when the operation control unit 32 determines that the blowing is zero, the operation such as the adjustment of the thermal power by the second operation unit 17 disposed on the front surface is valid. Thereby, even if the top plate 2 becomes hot due to blown down and cannot be operated by the first operation unit 11, the operation can be performed by the second operation unit 17.

  FIG. 12 is a flowchart showing a blow-off detection process in the heating cooker 100 of the present embodiment. This process is executed by each functional unit including the control unit 30. In this process, it is first determined whether or not the first operation unit 11 has been operated (S301). Here, when the 1st operation part 11 is not operated (S301: NO), it waits until the 1st operation part 11 is operated. When the first operation unit 11 is operated (S301: YES), it is determined whether or not the first operation unit 11 is in a locked state (S302).

  Here, when the 1st operation part 11 is not a locked state, ie, when it is a lock release state (S302: NO), this process is complete | finished and the heating control based on operation of the 1st operation part 11 is implemented. On the other hand, when the 1st operation part 11 is a locked state (S302: YES), measurement of elapsed time is started (S303). Then, it is determined whether or not the allowable time tp has passed (S304). Here, when the allowable time tp has not elapsed (S304: NO), it is determined that the first operation unit 11 is erroneously operated, and the display unit 15 or the audio output unit 18 notifies that it is an erroneous operation (S305). . And it is judged whether operation of the 1st operation part 11 is continuing (S306), and when continuing (S306: YES), it returns to step S304. On the other hand, when the operation of the first operation unit 11 is not continued (S306: NO), the process proceeds to step S309.

  On the other hand, when the allowable time tp has elapsed with the first operation unit 11 being operated (S304: YES), it is determined that the blow has been zeroed, and that the blowout has occurred from the display unit 15 or the audio output unit 18. Notification is made (S307). And the heating by the heating part 6 is stopped (S308). Thereafter, the measurement time is reset (S309), and this process ends.

  As described above, according to the present embodiment, it is possible to determine the presence or absence of blow-down from the operation time of the first operation unit 11, in addition to the effects of the first embodiment, a temperature sensor for blow-down, etc. Since it is not necessary to provide a separate component, the number of parts and product cost can be reduced.

  In the present embodiment, the configuration is such that the blow-off is detected based on the operation time of the first operation unit 11, but the top plate 2 has an electrode for detecting the blow-down separately from the first operation unit 11. You may arrange the blow-off detection part which consists of. Then, in the locked state, the operation control unit 32 stops energization to the first operation unit 11 to invalidate the operation, and can detect only the lock release unit 20 and the blow-off detection unit. Accordingly, since only a minimum number of electrodes are energized in the locked state, power consumption can be reduced. Further, a human sensor may be further added, and during heating, the sensitivity of the spill detector may be changed depending on whether a human is detected by the human sensor or not. It is possible to control more safely by increasing the sensitivity of the spill detector when heating and when no one is nearby.

  As mentioned above, although embodiment of this invention was described with reference to drawings, the concrete structure of this invention is not restricted to this, In the range which does not deviate from the summary of invention, it can change. For example, in the above-described embodiment, the case of the heating cooker 100 that induction-heats the container 10 has been described. However, the present invention is not limited to this, and the present invention is similarly applied to a gas heating cooker and an electric heater heating cooker. It is possible to apply.

  Moreover, although the case where the lock release unit 20 is a capacitive touch key has been described in the above embodiment, the present invention is not limited to this. For example, the lock release unit 20 may be a mechanical switch. FIG. 13 is a perspective view of a cooking device 100D according to a modification of the present invention. As shown in FIG. 13, the second operation unit 17 provided with the unlocking unit 20 and the lock state display unit 21 of the mechanical switch on the front side of the main body 1 may be disposed. FIG. 14 is a perspective view of a cooking device 100E according to another modification. As shown in FIG. 14, a second operation unit 17 </ b> A in the form of a kangaroo pocket may be provided, and the lock release unit 20 and the lock state display unit 21 may be arranged in the kangaroo pocket. The kangaroo pocket form is a configuration in which the upper part of the second operation part 17A is tilted to the front side with the rotation axis provided below as a center, and the operation panel on which the unlocking part 20 and the like are arranged is exposed upward. Say. As shown in FIG. 13 and FIG. 14, by using the lock release unit 20 as a mechanical switch, the lock release unit 20 is operated according to the user's intention, so that unlocking due to an erroneous operation can be prevented.

  Further, any one of the first operation units 11 may be used as the lock release unit 20. Specifically, any key of the first operation unit 11 may function as the unlocking unit 20 in the locked state and function as the operating unit in the unlocked state. In addition, the cooking device 100 may further include a voice input unit such as a microphone and a voice recognition unit, and may receive an unlock instruction by voice operation.

  Moreover, in the said embodiment, when the lock release part was pushed again during lock release, it changed to the locked state, However, It is not limited to this. For example, when the unlocking unit 20 is operated again during unlocking, the unlocking time ta may be extended while maintaining the setting operation. In this case, when the display of the lock state display unit 21 is changed to blinking, the display state before the change is restored. Thus, by operating the lock release unit 20 again to extend the release time ta, the user can perform the operation without being impatient. In addition, when the unlocking unit 20 is pressed for a long time again during unlocking, it is switched to the locked state, and when the unlocking unit 20 is pressed again for a short time during unlocking, the unlocking time ta is extended. It may be.

  DESCRIPTION OF SYMBOLS 1 Main body, 2 Top plate, 6 Heating part, 6a Inner heating coil, 6b Outer heating coil, 10 Container, 11 1st operation part, 12 Intake / exhaust port, 14 Heating port, 15 Display part, 16 Grill part, 17, 17A 2nd operation part, 17a Power switch, 18 Audio output part, 20, 20a, 20b, 20c Unlock part, 21, 21a, 21b, 21c Lock state display part, 27 High frequency inverter, 28 Top plate temperature sensor, 29 Ambient temperature Sensor, 30 control unit, 31 display control unit, 32 operation control unit, 33 storage unit, 34 drive unit, 35 audio output control unit, 100, 100A, 100B, 100C, 100D, 100E cooking device, 280 top plate temperature detection Department.

Claims (13)

A heating unit for heating an object to be heated;
A capacitance-type operation unit operated to control the heating unit;
An operation control unit that switches between a locked state in which an operation on the operation unit is disabled and an unlocked state that receives an operation on the operation unit;
An unlocking unit operated to release the locked state,
The operation controller is
Usually including the heating state by the heating unit in the locked state,
When the unlocking unit is operated, switching from the locked state to the unlocked state ,
When the release time has elapsed since switching from the locked state to the unlocked state, it is switched from the unlocked state to the locked state,
The release time, the cooking device according to claim Rukoto is set according to the cooking mode selected through the operation unit. The release time is set longer when the use frequency of the cooking mode selected through the operation unit is low than when the use frequency of the cooking mode selected through the operation unit is high. The cooking device according to claim 1 . The operation control unit is for determining a user's proficiency regarding the operation of the operation unit based on an operation time when selecting via the operation unit,
The cooking device according to claim 1 , wherein the release time is set longer when the proficiency level is low than when the proficiency level is high. A capacitance type power switch that is operated to turn on or off the power of the cooking device;
The cooking device according to any one of claims 1 to 3 , wherein the operation control unit invalidates the operation of the power switch in the locked state. The unlocking unit is a capacitive touch key,
The cooking device according to any one of claims 1 to 4 , wherein the unlocking unit is arranged farther from the heating unit than the operation unit. The cooking device according to any one of claims 1 to 4 , wherein the unlocking unit is a mechanical switch. A plurality of the heating units;
A plurality of the operation units respectively corresponding to the plurality of heating units;
A plurality of the unlocking units respectively corresponding to the plurality of operation units,
The operation control unit switches the operation unit corresponding to the operated unlocking unit from the locked state to the unlocked state when any of the plurality of unlocking units is operated. The cooking device according to any one of claims 1 to 6 . A temperature sensor for detecting the ambient temperature of the unlocking unit;
The operation control unit maintains the locked state even when the lock release unit is operated when a temperature detected by the temperature sensor is equal to or higher than a predetermined temperature. heating cooker according to any one of 1-7. The cooking device according to any one of claims 1 to 8 , wherein the operation control unit switches to the locked state when the unlocking unit is operated in the unlocked state. The cooking device according to any one of claims 1 to 9 , wherein the operation control unit extends the release time when the lock release unit is operated in the unlocked state. The said operation control part judges the presence or absence of blowing down based on the length of the time when the said operation part is operated in the said locked state, The said any one of Claims 1-10 characterized by the above-mentioned. Cooking device. The cooking device according to any one of claims 1 to 11 , further comprising a display unit that displays the locked state and the unlocked state in an identifiable manner. The operation control unit, when said unlocking portion and the operation portion is operated at the same time, according to any one of claim 1 to 12, characterized in that the disabling operation of the operating unit Cooking cooker.

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