JP5230544B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker that performs cooking by applying pressure.

  For example, in a rice cooker as a heating cooker, it is well known to cook rice by increasing the pressure in the inner pot in which water, rice, or the like is placed. In such a rice cooker, if the lid opening / closing button is squeezed down and the lid is opened for some reason during rice cooking, the pressure in the inner pot may be reduced, making it impossible to cook rice. In order to avoid such a problem, a technique has been proposed in which the lid is locked and cannot be opened during cooking.

  In a conventional rice cooker, for example, “a valve hole is provided in the middle of the steam passage of the lid, the valve hole is closed by a pressure adjusting ball placed on the valve hole, and the pressure adjusting ball is moved from above the valve hole. In the rice cooker provided with an opening means for opening the valve hole at least, a valve seat rising along the pressure adjusting ball is formed around the valve hole, and a part of the valve seat is formed from the valve hole. A rice cooker characterized in that a ball escape portion having a rise that is lower than other valve seat portions in the direction in which the rice cooker is most difficult to tilt is proposed (see, for example, Patent Document 1).

Japanese Patent No. 3151135 (Claim 1)

  In a conventional cooking device, a pressure adjusting ball is placed in a valve hole provided in the steam passage of the lid, the valve hole is closed by the pressure adjusting ball when the solenoid is activated, and the pressure adjusting ball is moved when the solenoid is not activated. To open the valve hole. In addition, a lock piece that moves in conjunction with the operation of the solenoid is provided, and when the valve hole is closed, the lock piece is engaged with the lid hook so that the lid cannot be opened, and when the valve hole is open. The lock piece is released from the lid hook so that the lid can be opened.

  However, in the conventional technique, the lid can be opened simultaneously with the opening of the valve hole. For this reason, after opening a valve hole, there existed a problem that opening of a cover body would be attained before the pressure in an inner hook falls enough.

  The present invention has been made to solve the above-described problems, and provides a cooking device capable of making it impossible to open the lid even when the valve hole is opened. .

The cooking device according to this invention is
A body case with an open top;
A lid that covers the upper part of the main body case so as to be freely opened and closed;
A pressure adjusting ball for opening and closing a valve hole provided in the middle of the vapor passage of the lid;
A valve hole opening and closing device provided on the lid for moving the pressure adjusting ball to open and close the valve hole;
A hook provided on the lid for locking the lid to the body case;
A lid opening / closing button provided on the lid for releasing the lock of the hook;
The valve hole opening and closing device is
During operation, the pressure adjusting ball is moved onto the valve hole to close the valve hole, and the lid opening / closing button is locked,
When the pressure is not activated, the pressure adjusting ball is moved from above the valve hole to open the valve hole, and the lock of the lid opening / closing button is held.

  Since this invention opens the valve hole by moving the pressure adjusting ball from above the valve hole when the valve hole opening / closing device is not in operation, and holds the lock of the lid opening / closing button, even when the valve hole is open, The opening of the lid can be made impossible.

It is a longitudinal cross-sectional view of the rice cooker which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the cover body part of the rice cooker which concerns on Embodiment 1 of this invention. It is a control block diagram of the rice cooker which concerns on Embodiment 1 of this invention. It is a figure explaining operation | movement of the valve hole opening / closing apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining operation | movement of the valve hole opening / closing apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining operation | movement of the valve hole opening / closing apparatus which concerns on Embodiment 1 of this invention. It is a figure explaining the rice cooking process which concerns on Embodiment 1 of this invention. It is a longitudinal cross-sectional view of the cover body part of the rice cooker which concerns on Embodiment 2 of this invention. It is a control block diagram of the rice cooker which concerns on Embodiment 2 of this invention. It is a flowchart which shows the cooking operation which concerns on Embodiment 3 of this invention. It is a longitudinal cross-sectional view of the rice cooker which concerns on Embodiment 4 of this invention.

Embodiment 1 FIG.
Hereinafter, a rice cooker will be described as an example of a heating cooker.
Note that the present invention is not limited to this. Not only cooking rice, it can be applied to a cooking device capable of various cooking such as steamed food, boiled food, stew.

[Constitution]
1 is a longitudinal sectional view of a rice cooker according to Embodiment 1 of the present invention.
FIG. 2 is a longitudinal sectional view of the lid portion of the rice cooker according to Embodiment 1 of the present invention.
In the following description, the left side of FIGS. 1 and 2 is referred to as “front”, and the right side is referred to as “rear”.

In FIG.1 and FIG.2, the rice cooker in this Embodiment is provided with the rice cooker main body 1 and the cover body 10. As shown in FIG.
The upper part of the rice cooker main body 1 has a lid 10 made of a synthetic resin that is pivotally supported by a hinge part 2 provided at one end of the rice cooker main body 1 having an upper opening and a metal plate in part. Is provided so as to be openable and closable.

  The “rice cooker body 1” corresponds to the “main body case” in the present invention.

In the lower part of the rice cooker main body 1, a substantially deep dish-shaped coil base 3 is installed.
An electromagnetic induction coil 4 is disposed on the lower surface and the corner surface of the coil base 3.
5 is a temperature sensor. The temperature sensor 5 is provided near the center of the bottom of the coil base 3. The temperature sensor 5 is biased by a spring and protrudes upward from the bottom of the coil base 3.

  6 is an inner pot. The inner pot 6 is accommodated in the rice cooker body 1 with a flange 6 a provided on the outer periphery of the upper opening being locked to the rice cooker body 1. The lower part of the inner hook 6 is located close to the coil base 3, and the temperature sensor 5 biased by the spring contacts the bottom surface thereof.

Reference numeral 7 denotes a control board. The control board 7 is provided on the front side in the rice cooker body 1 and includes a control unit 100 (described later).
Reference numeral 8 denotes an operation unit. The operation unit 8 is provided on the front surface of the rice cooker body 1. The operation unit 8 is an operation panel, and by receiving an input operation using a button or the like, performs rice cooking, reserved rice cooking, heat insulation, and the like, and inputs settings such as a change in the type of rice cooking to the control unit 100.
Reference numeral 8a denotes a display unit. The display unit 8a is constituted by a liquid crystal panel, for example. The display unit 8a displays the setting state and the operation state, and the fact that the lid 10 cannot be opened (described later), so that the user can check the state.

  In addition, as this display part 8a, you may use other means, such as not only this but the display by a light emitting element. Moreover, you may use for notifying with an audio | voice by not only a display but a speaker, a buzzer, etc.

  The “display unit 8a” corresponds to “notification means” in the present invention.

  9 is an engaging part. The engaging part 9 is provided in the front side of the upper opening part of the rice cooker main body 1, and the hook 55 of the cover body 10 mentioned later is latched.

The lid body 10 includes an upper lid 11, an inner lid 12, and an inner lid 13.
The inner lid 12 is disposed on the lower surface of the upper lid 11. An intermediate lid intermediate member 14 made of a metal plate is fixed to the lower surface of the intermediate lid 12.
The inner lid 13 is made of a metal plate and is detachably attached to the lower surface of the inner lid 12 to cover the upper opening of the inner hook 6.
On the rear side of the upper lid 11, a recess 15 having an opening 16 and having an open rear end is provided. In this recess 15, a cartridge 17 having a bottomed cylindrical portion 18 provided therein is accommodated by removably inserting the cylindrical portion 18 into the opening 16.
Reference numeral 19 denotes a vent hole. The vent hole 19 is provided at the bottom of the cylindrical portion 18.
20 is a steam port. The steam port 20 is provided on the upper wall of the cartridge 17.

A lid opening / closing button 23 is disposed in a recess 21 provided on the front side of the upper lid 11. The lid opening / closing button 23 is inserted into the recess 21 of the upper lid 11 and is pushed down by the user to push down the pressing portion 22 provided on the hook 55.
Accordingly, the lid opening / closing button 23 is provided on the lid body 10 and unlocks the hook 55.

A dome-shaped valve chamber 30 having an opening at the bottom and an opening 31 on the front side is provided at substantially the center of the upper surface of the inner lid 12.
The opening 31 is closed by a ring-shaped seal member 32 having an elastic body 33 provided at the center.
Reference numeral 34 denotes a steam passage. The steam passage 34 communicates the lower part of the valve chamber 30 and the vent hole 19 of the cartridge 17.

An opening 85 is provided in the inner lid 13 directly below the valve chamber 30 provided in the inner lid 12.
The opening 85 is fitted with an inner cylinder 86 having a cylindrical shape, the top surface of which is located at a substantially middle portion in the vertical direction of the valve chamber 30.
A valve hole 89 is provided at the center of the top plate of the inner cylinder 86, and a valve seat 90 whose rear side is inclined upward is formed on the outer periphery of the valve hole 89 on the top surface of the top plate.
91 is a pressure adjusting ball. The pressure adjusting ball 91 is located on the valve seat 90.
The pressure adjusting ball 91 is moved by a valve hole opening / closing device 40 (described later), and opens and closes a valve hole 89 provided in the middle of the vapor passage 34 of the lid 10.

55 is a hook. The hook 55 is provided in the vicinity of the front end portion of the upper surface of the inner lid 12 and is formed in an approximately L shape. The hook 55 locks the lid 10 to the rice cooker body 1.
The horizontal piece 56 of the hook 55 is provided with a pressing portion 22 that faces the lid opening / closing button 23. Further, the vertical piece 57 of the hook 55 is provided with a locking claw for locking to the engaging portion 9 provided in the rice cooker body 1.
The hook 55 is supported by a support shaft 58 and always urges the hook 55 by a spring (not shown). When the pressing part 22 is pushed down by the lid opening / closing button 23, the pressing part 22 rotates around the support shaft 58 and the locking claw is detached from the engaging part 9.

  Reference numeral 40 denotes a valve hole opening / closing device. The valve hole opening / closing device 40 moves the pressure adjusting ball 91 onto the valve hole 89 during operation, closes the valve hole 89, locks the lid opening / closing button 23, and moves the pressure adjusting ball 91 over the valve hole 89 when not operated. To open the valve hole 89 and hold the lid open / close button 23 locked. Details of the operation will be described later.

  The valve hole opening / closing device 40 includes a solenoid 50, a slide member 41, a push lock mechanism 60, and a lock piece 26a.

  The “slide member 41” corresponds to the “operating member” in the present invention.

The solenoid 50 is fixed to the inner lid 12 of the lid body 10. The movable iron core 52 of the solenoid 50 is connected to the slide member 41, and in a non-energized state, as shown in FIGS. 1 and 2, is in a forward movement state (a discharge state on the rear side).
53 is a return spring. The return spring 53 is interposed in the movable iron core 52 between the case of the solenoid 50 and the slide member 41, and biases the slide member 41 to the rear side.
As a result, the movable iron core 52 contracts when the solenoid 50 is energized, and expands due to the biasing force of the return spring 53 when the solenoid 50 is not conductive.

The slide member 41 is provided with a protrusion 47 that is pressed by the movable iron core 52 of the solenoid 50 on the rear side. A push lock mechanism 60 is connected to the front side.
The slide member 41 is connected to the solenoid 50. When the solenoid 50 is operated, the pressure adjusting ball 91 is moved onto the valve hole 89 to close the valve hole 89. When the solenoid 50 is not operated, the pressure adjusting ball 91 is moved from above the valve hole 89. The valve hole 89 is opened by moving.

The push lock mechanism 60 is connected to the slide member 41, and when the solenoid 50 is operated, a compressive force is applied by the slide member 41 moved to the front side and the pressing portion 12a formed on the inner lid 12.
The push lock mechanism 60 is locked in a contracted state by applying a compressive force and maintains the contracted state. By applying the compressive force again, the lock is released and expanded to maintain the expanded state.

The push lock mechanism 60 includes a moving body 62, a case body 61 that houses the moving body 62 in a contracted state, and a compression spring 63 that biases the moving body 62 in the extension direction.
This push lock mechanism 60 is, for example, a so-called push-lock type heart cam that locks the position of the moving body 62 by engagement with a heart cam formed on the moving body 62 and a lock pin that is formed on the case body 61 and press-contacts the heart cam. It consists of a mechanism.
As a result, when the moving body 62 is compressed against the urging force of the compression spring 63, the push lock mechanism 60 is locked in a state in which the moving body 62 is retracted into the case body 61 and enters a contracted state. When the moving body 62 is compressed again, the lock is released, and the moving body 62 is extended from the case body 61 by the urging force of the compression spring 63.

The lock piece 26 a is connected to the moving body 62 of the push lock mechanism 60.
When the lock piece 26 a is moved below the horizontal piece 56 of the hook 55, the lock piece 26 a prevents the hook 55 from rotating and locks the lid opening / closing button 23.

FIG. 3 is a control block diagram of the rice cooker according to Embodiment 1 of the present invention.
In FIG. 3, the control unit 100 is configured by a microcomputer or the like. The control unit 100 receives setting information from the operation unit 8 and detection information from the temperature sensor 5 and the like, and controls driving of an inverter circuit (not shown) based on these information, The rice cooking process is carried out by controlling energization.
Moreover, the control part 100 displays the information of a driving | running state and a setting state, such as the information regarding a rice cooking process, for example on the display part 8a.
In addition, the control unit 100 includes a timer 110 that measures the passage of a predetermined time (described later).
Further, the control unit 100 controls energization to the solenoid 50 to control the expansion / contraction operation of the movable iron core 52 of the solenoid 50.

[Operation]
4-6 is a figure explaining the operation | movement of the valve-hole opening / closing apparatus based on Embodiment 1 of this invention.
FIG. 7 is a diagram illustrating a rice cooking process according to Embodiment 1 of the present invention.
Hereinafter, operation | movement of the cover body 10 in the case of cooking with the rice cooker in this Embodiment is demonstrated, referring FIG. 7 based on FIGS.

In the initial state, it is assumed that the solenoid 50 is in a non-energized state and the push lock mechanism 60 is in a contracted state.
When the lid 10 is closed in this state, as shown in FIG. 4A, the vertical piece 57 of the hook 55 is latched by the latching claw of the engaging portion 9, and the lid 10 is attached to the rice cooker main body 1. The upper opening is closed and locked.
At this time, since the solenoid 50 is in a non-energized state, the movable iron core 52 of the solenoid 50 extends due to the urging force of the return spring 53. Then, the slide member 41 connected to the solenoid 50 also slides to the rear side, and the projection 47 presses and elastically deforms the elastic body 33 provided in the opening 31 of the valve chamber 30 so that the pressure adjusting ball 91 is The valve hole 89 is opened by moving to the rear side of the seat 90.
The push lock mechanism 60 is in a contracted state. At this time, the lock piece 26a connected to the push lock mechanism 60 is located on the rear side of the horizontal piece 56 of the hook 55 as shown in FIG.

  When the lid opening / closing button 23 is squeezed down in this state, as shown in FIG. 4B, the pressing portion 22 squeezes the horizontal piece 56 and rotates the hook 55 to engage the locking claw of the vertical piece 57. Since it separates from the joint portion 9, the lid body 10 can be opened around the hinge portion 2 as a shaft.

Next, when cooking rice, the user sets the inner pot 6 in which predetermined rice and water are put in the rice cooker body 1 and closes the lid 10 (FIG. 4A).
And a user operates the operation part 8 and starts a rice cooking process.
As shown in FIG. 7, in the preheating process, the control unit 100 controls energization to the electromagnetic induction coil 4 based on the temperature detected by the temperature sensor 5 so that the inner hook 6 reaches a predetermined temperature for a predetermined time. To control. In this preheating step, the solenoid 50 is in a non-energized state (0 V).

Next, in the rice cooking process, the control unit 100 energizes (activates) the solenoid 50 to contract the movable iron core 52 of the solenoid 50.
Then, as shown in FIG. 5C, the slide member 41 connected to the solenoid 50 moves to the front side, and the pressure adjusting ball 91 moves due to its own weight to close the valve hole 89.
Further, the push lock mechanism 60 moves to the front side in conjunction with the slide member 41, and is pressed by the pressing portion 12a to apply a compressive force. Thereby, the lock of the push lock mechanism 60 is released, but the contracted state is maintained by the pressing force from the slide member 41.

  At this time, as shown in FIG. 5C, the lock piece 26 a connected to the push lock mechanism 60 moved to the front side moves below the horizontal piece 56 of the hook 55, and the hook 55 rotates. Stop. As a result, the lid opening / closing button 23 is locked and the lid 10 cannot be opened.

Moreover, as shown in FIG. 7, the control part 100 controls electricity supply to the electromagnetic induction coil 4 based on the detection temperature of the temperature sensor 5 in a rice cooking process, and the inner pot 6 becomes predetermined rice cooking temperature. Control.
During cooking, since the valve hole 89 of the inner cylinder 86 is closed, the steam generated in the inner pot 6 does not leak, so the pressure in the inner pot 6 rises and rice cooking is performed under high pressure. Is called.
In this rice cooking process, the solenoid 50 maintains an energized state.
Thereby, the lock | rock of the lid | cover opening / closing button 23 is maintained during a rice cooking process.

  For energization of the solenoid 50, for example, 100V is applied when a driving force for contracting the movable iron core 52 is applied, and a predetermined voltage (for example, 50V) is applied when the contracted state is maintained.

  The “rice cooking process” corresponds to the “pressure process” in the present invention.

Next, the control part 100 stops electricity supply to the solenoid 50 just before a rice cooking process is complete | finished (non-operation). The movable iron core 52 of the solenoid 50 extends due to the urging force of the return spring 53.
Then, as shown in FIG. 5 (d), the slide member 41 moves to the rear side, and the pressure adjusting ball 91 is pressed by the protrusion 47, whereby the pressure adjusting ball is moved from above the valve hole 89, and the valve hole Open 89.
As a result, the high-pressure steam in the inner pot 6 passes through the valve chamber 30 from the valve hole 89 of the inner cylinder 86, and is discharged to the outside through the steam passage 34 and the vent hole 19 of the cartridge 17.

At this time, as shown in FIG. 5D, the push lock mechanism 60 is in an extended state in which the pressing force from the slide member 41 is released and the moving body 62 protrudes from the case body 61 by the urging force of the compression spring 63. Become.
For this reason, the lock piece 26 a is located below the horizontal piece 56 of the hook 55 and prevents the hook 55 from rotating.
Thereby, even when the solenoid 50 is inactive, the lid opening / closing button 23 is locked and the lid 10 cannot be opened.

Next, in the unevenness process, the timer 110 of the control unit 100 measures the elapse of a predetermined time after deactivating the solenoid 50. As this predetermined time, a time required for the pressure in the inner hook 6 to sufficiently decrease is set. For example, it is set to 20 to 30 seconds.
After a predetermined time has elapsed, the control unit 100 activates the solenoid 50.
Then, as shown in FIG. 6E, the slide member 41 and the push lock mechanism 60 move to the front side.
At this time, the push lock mechanism 60 is locked by the pressing portion 12a, is again applied with a compressive force, is locked in the contracted state, and holds the contracted state.

The control unit 100 deactivates the solenoid 50 after a predetermined time (for example, 2 to 3 seconds) has elapsed.
Thereby, as shown in FIG.6 (f), the slide member 41 and the push lock mechanism 60 move to a rear part side again.
The push lock mechanism 60 moves to the rear side in conjunction with the slide member 41 while maintaining the contracted state. At this time, the lock piece 26 a connected to the push lock mechanism 60 moves to the rear side from the horizontal piece 56 of the hook 55.
Thereby, since the lock | rock of the lid | cover opening / closing button 23 is cancelled | released, the cover body 10 can be open | released.

[effect]
As described above, in the present embodiment, when the valve hole opening / closing device 40 is operated, the pressure adjusting ball 91 is moved onto the valve hole 89 to close the valve hole 89, and the lid opening / closing button 23 is locked to deactivate it. At times, the pressure adjusting ball 91 is moved from above the valve hole 89 to open the valve hole 89 and hold the lid opening / closing button 23 locked.
For this reason, even if the valve hole 89 is opened, the lid 10 can not be opened.
Therefore, for example, immediately after the end of the rice cooking process, or immediately after the rice cooking process is stopped by a power failure or user operation, even when the pressure in the inner pot 6 is increased even in the state where the valve hole 89 is opened, It is possible to prevent the lid 10 from being opened.

Further, when the solenoid 50 is operated, a compression force is applied to the push lock mechanism 60, and the lid opening / closing button 23 is locked by the lock piece 26a. When the solenoid 50 is not in operation and the push lock mechanism 60 is in the extended state, the lid opening / closing button 23 is locked by the lock piece 26a. When the push lock mechanism 60 is in the contracted state, the lid opening / closing by the lock piece 26a is performed. The lock of the button 23 is released.
For this reason, even if it is the state which opened the valve hole 89 by the simple structure which provides the push lock mechanism 60, it can make the opening of the cover body 10 impossible.

Moreover, the solenoid 50 is operated at the time of a rice cooking process, and the valve hole 89 is obstruct | occluded. In addition, after the rice cooking process is finished, the solenoid 50 is deactivated and the valve hole 89 is opened. After a predetermined time has elapsed, the solenoid 50 is operated for a predetermined time, and a compressive force is applied to the push lock mechanism 60 to maintain the contracted state. Then, the lid opening / closing button 23 is unlocked by the lock piece 26a.
For this reason, at the time of a rice cooking process, the valve hole 89 is obstruct | occluded and the pressure in the inner hook 6 can be raised, and opening | closing of the cover body 10 can be made impossible.
Moreover, after the rice cooking process is completed, the valve hole 89 is opened, and the lid 10 can be made unopenable for a predetermined time until the pressure in the inner pot 6 decreases.
In addition, after the predetermined time has elapsed, the lid opening / closing button 23 is unlocked, and the lid body 10 can be opened.

In the first embodiment, the lock piece 26a is connected to the push lock mechanism 60, and the operation of the hook 55 is blocked by the lock piece 26a to lock the lid opening / closing button 23. The present invention is not limited to this.
For example, the push lock mechanism 60 may also serve as the lock piece 26a.
That is, when the solenoid 50 is operated, a compression force is applied to the push lock mechanism 60 and the lid opening / closing button 23 is locked by the push lock mechanism 60. When the solenoid 50 is not in operation and the push lock mechanism 60 is in the extended state, the lid opening / closing button 23 is locked by the push lock mechanism 60. When the push lock mechanism 60 is in the contracted state, the push lock mechanism 60 The lid opening / closing button 23 may be unlocked.

Embodiment 2. FIG.
FIG. 8 is a longitudinal sectional view of the lid portion of the rice cooker according to Embodiment 2 of the present invention.
As shown in FIG. 8, the rice cooker in the present embodiment includes a micro switch 70 that detects the position of the push lock mechanism 60 in addition to the configuration of the first embodiment.
Other configurations are the same as those of the first embodiment, and the same reference numerals are given to the same portions.

The micro switch 70 is constituted by, for example, a mechanical contact switch.
The micro switch 70 detects whether or not the lock piece 26 a connected to the push lock mechanism 60 is positioned below the horizontal piece 56 of the hook 55. That is, the locked state of the lid opening / closing button 23 is detected.
In the present embodiment, the locked state of the lid opening / closing button 23 is detected using a mechanical contact. However, the present invention is not limited to this, and the locking state of the lid opening / closing button 23 can be detected. It ’s fine. For example, the position of the lock piece 26a or the push lock mechanism 60 may be detected by an infrared position sensor or the like.

  The “microswitch 70” corresponds to “lock state detecting means” in the present invention.

FIG. 9 is a control block diagram of the rice cooker according to Embodiment 2 of the present invention.
Based on the detection state of the microswitch 70, the control unit 100 according to the present embodiment displays on the display unit 8a that the lid 10 cannot be opened when the lid opening / closing button 23 is in the locked state. For example, “The cover cannot be opened because the pressure is high.” Is displayed.
The display is not limited to the display using the display unit 8a, and may be used for notification by sound using, for example, a speaker or a buzzer.

[effect]
As described above, in the present embodiment, when the lid opening / closing button 23 is in the locked state, a notification is given that the lid 10 cannot be opened.
Therefore, it is possible to notify the user that the lid opening / closing button 23 is in the locked state.
For example, after the rice cooking process is completed, when the lid opening / closing button 23 is in a locked state, the user can know why the lid 10 cannot be opened.

Embodiment 3 FIG.
In Embodiment 3, for example, when the supply of AC power to the rice cooker is stopped due to a power failure or the like, and after the supply of AC power is restored due to the recovery of a power failure or the like, for example, the lid opening / closing button 23 is not in the locked state, A mode in which the lid opening / closing button 23 is locked will be described.
In addition, the structure of the rice cooker in this Embodiment is the same as that of the said Embodiment 2, and attaches | subjects the same code | symbol to the same part.

  The control unit 100 according to the present embodiment operates the solenoid 50 in accordance with the detection state of the microswitch 70 in addition to the operations of the first and second embodiments.

FIG. 10 is a flowchart showing a cooking operation according to Embodiment 3 of the present invention.
Hereinafter, the cooking operation in the present embodiment will be described based on the steps in FIG.

(S101)
First, the control part 100 starts a cooking process similarly to Embodiment 1 mentioned above by operation of the operation part 8 by a user.
And the control part 100 detects the presence or absence of blackout generation of the alternating current power supplied to the said rice cooker. The presence or absence of this power failure is detected when a power failure has occurred when the supply of AC power to the rice cooker is stopped and the supply of AC power is restored again.
If the occurrence of a power failure is not detected, the process proceeds to step S105.

(S102)
When detecting the occurrence of a power failure, the control unit 100 determines whether or not the lid opening / closing button 23 is in a locked state based on the detection state of the micro switch 70.
If the lid opening / closing button 23 is in the locked state, the process proceeds to step S104.

(S103)
On the other hand, when the lid opening / closing button 23 is not in the locked state, the control unit 100 operates the solenoid 50 to lock the lid opening / closing button 23. This locking operation is the same as in the first embodiment.

(S104)
Next, the control unit 100 determines whether or not to continue the cooking operation. This determination is made based on the progress state of the cooking process, for example.
If it is determined that the cooking operation is not continued, the process proceeds to step S106.

(S105)
On the other hand, when it is determined in step S104 that the cooking operation is to be continued, and when the lid opening / closing button 23 is in the locked state in step S102, the control unit 100 determines whether or not the rice cooking process has been completed.
When the rice cooking process is continuing, the process returns to step S101 to detect again whether or not a power failure has occurred.

(S106)
On the other hand, if it is determined in step 105 that the rice cooking process has been completed, and if it is determined in step S104 that the cooking operation is not to be continued, the control unit 100 deactivates the solenoid 50 and opens the valve hole 89. At this time, similarly to the first embodiment, the lid opening / closing button 23 is locked and the lid body 10 cannot be opened even when the solenoid 50 is deactivated.

(S107)
Next, as in the first embodiment, after the time necessary for the pressure in the inner hook 6 to sufficiently decrease has elapsed, the control unit 100 operates the solenoid 50 again, and opens the lid opening / closing button 23. unlock.

[effect]
As described above, in the present embodiment, after the supply of AC power to the rice cooker is stopped and the supply of AC power is restored, it is determined whether the lid opening / closing button 23 is in the locked state, and the lid opening / closing button. When 23 is not locked, the solenoid 50 is operated to lock the lid opening / closing button 23.
For this reason, for example, after the supply of AC power is restored due to restoration of a power failure or the like, the lid opening / closing button 23 can be locked when the lid opening / closing button 23 is not in the locked state.

When the cooking operation is not continued after the supply of AC power is restored, the valve hole 89 is opened, and after a predetermined time has elapsed, the solenoid 50 is operated to unlock the lid opening / closing button 23.
For this reason, when the pressure in the inner hook 6 rises, the lid body 10 can be prevented from being opened, and the lid body 10 can be opened with the pressure in the inner hook 6 sufficiently lowered. It can be.

Embodiment 4 FIG.
FIG. 11 is a longitudinal sectional view of a rice cooker according to Embodiment 4 of the present invention.
As shown in FIG. 11, the rice cooker in the present embodiment includes a battery 200 that supplies at least the driving power of the display unit 8 a when the supply of AC power to the rice cooker is stopped.
Other configurations are the same as those of the second embodiment, and the same reference numerals are given to the same portions.

With such a configuration, even when the supply of AC power to the rice cooker is stopped due to, for example, a power failure, the display unit 8a is driven by the power from the battery 200.
As in the second embodiment, the display unit 8a displays that the lid 10 cannot be opened when the lid opening / closing button 23 is in the locked state.

[effect]
As described above, since the battery 200 is provided in the present embodiment, when the supply of AC power to the rice cooker is stopped, the user is notified that the lid opening / closing button 23 is in the locked state. Can do.
For example, when the lid opening / closing button 23 is locked during a power failure, the user can know why the lid 10 cannot be opened.

  In the above description, the case where the notification is performed using the display unit 8a has been described. However, the present invention is not limited to this.

  DESCRIPTION OF SYMBOLS 1 Rice cooker body, 2 hinge part, 3 coil stand, 4 electromagnetic induction coil, 5 temperature sensor, 6 inner pot, 6a flange, 7 control board, 8 operation part, 8a display part, 9 engagement part, 10 lid, DESCRIPTION OF SYMBOLS 11 Top cover, 12 Middle cover, 12a Holding part, 13 Inner cover, 14 Middle cover intermediate member, 15 Recessed part, 16 Opening part, 17 Cartridge, 18 Cylindrical part, 19 Vent, 20 Steam port, 21 Recessed part, 22 Press , 23 Lid opening / closing button, 26a Lock piece, 30 Valve chamber, 31 Opening, 32 Seal member, 33 Elastic body, 34 Steam passage, 40 Valve hole opening / closing device, 41 Slide member, 47 Projection, 50 Solenoid, 52 Movable Iron core, 55 hook, 56 horizontal piece, 57 vertical piece, 58 support shaft, 60 push lock mechanism, 61 case body, 62 moving body, 63 compression spring, 70 microphone Switch, 85 opening, 86 inner cylinder, 89 valve hole, 90 valve seat, 91 pressure regulating balls, 100 control unit, 110 timer, 200 battery.

Claims (7)

A body case with an open top;
A lid that covers the upper part of the main body case so as to be freely opened and closed;
A pressure adjusting ball for opening and closing a valve hole provided in the middle of the vapor passage of the lid;
A valve hole opening and closing device provided on the lid for moving the pressure adjusting ball to open and close the valve hole;
A hook provided on the lid for locking the lid to the body case;
A lid opening / closing button provided on the lid for releasing the lock of the hook;
The valve hole opening and closing device is
During operation, the pressure adjusting ball is moved onto the valve hole to close the valve hole, and the lid opening / closing button is locked,
A cooking device, wherein the pressure adjusting ball is moved from above the valve hole when not in operation to open the valve hole and hold the lid open / close button locked. The valve hole opening and closing device is
A solenoid fixed to the lid and extending and contracting;
The solenoid is connected to the solenoid, and when the solenoid is operated, the pressure adjusting ball is moved onto the valve hole to close the valve hole, and when not operated, the pressure adjusting ball is moved from above the valve hole to move the valve hole. An actuating member for opening
A push lock mechanism connected to the actuating member, locked in a contracted state by applying a compressive force, and held in a contracted state; and by applying a compressive force again, the lock is released and extended to maintain an extended state; ,
A lock piece coupled to the push-lock mechanism and locking the lid opening / closing button;
When the solenoid is activated, a compression force is applied to the push lock mechanism, and the lid opening / closing button is locked by the lock piece,
The lid opening / closing button is locked by the lock piece when the push lock mechanism is in an extended state, and the lid opening / closing button by the lock piece is locked when the push lock mechanism is in a contracted state. The cooking device according to claim 1, wherein the lock is released. A control unit for controlling the operation of the solenoid;
The controller is
Actuate the solenoid during the pressure process to close the valve hole,
After the pressure step, the solenoid is deactivated and the valve hole is opened.After a predetermined time has elapsed, the solenoid is operated for a predetermined time, and a compressive force is applied to the push lock mechanism to maintain a contracted state. The cooking device according to claim 2, wherein the lid opening / closing button is unlocked by the lock piece. A lock state detecting means for detecting a lock state of the lid opening / closing button;
The controller is
The cooking device according to claim 3, wherein the solenoid is operated according to a detection state of the lock state detection means. The controller is
After the supply of AC power to the heating cooker is stopped and the supply of AC power is restored, it is determined whether the lid open / close button is in a locked state,
5. The cooking device according to claim 4, wherein when the lid opening / closing button is not in a locked state, the solenoid is operated to lock the lid opening / closing button with the locking piece. The cooking device according to any one of claims 1 to 5, further comprising notification means for notifying that the lid cannot be opened when the lid opening / closing button is in a locked state. The cooking device according to claim 6, further comprising a battery that supplies at least the driving power of the notification means when the supply of AC power to the cooking device stops.

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