JPH0737044Y2 - Heating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a heating device such as high frequency heating having a container for kneading and heating bread and the like.

<Prior art> A high-frequency heating device selectively heats a dielectric by high-frequency induction heating, and is used in microwave ovens in general households to heat various foods including thawing and reheating frozen foods. It has become very popular in recent years as a cooking utensil.

Also, as an additional function of the microwave oven, one that darkens the food by using an electric heating element or the like, and recently, after kneading the food material in a container placed in the heating chamber to make bread or the like, Those that perform heating have been proposed.

<Problems to be solved by the invention> However, when making bread, for example, generally, ingredients such as flour, butter, sugar, salt, and yeast water are kneaded in a container having a stirring blade for kneading. After dripping, 30 ℃ ~
Fermentation is carried out at a temperature of 40 ° C., followed by heating and baking at a high temperature, which requires a very long time of about 2 hours to 4 hours.

Further, many of them have a function of presetting a finishing time so that they can be just baked when waking up in the morning. In this case, the time from the start of cooking to the end of cooking is considerably long.

Therefore, in the case of cooking that requires a long time, if the door is left open due to a user's mistaken operation or a child's unnecessary operation during heating or during the waiting period after reservation setting, heating will not occur. If the heating is not started even if the door is closed, or if the door is closed, the operation will still be stopped.

In addition, even if the operation of heating restart is performed, if the heating has been interrupted for a long time, the fermentation of the bread progresses especially in bread making etc., resulting in over-fermentation,
A problem occurs that the finish of the bread becomes extremely poor.

Also, even if you notice that the door is open in the middle and close the door and restart heating, for example, if the door is open for a long time during the fermentation process of bread making, fermentation will also occur during that time. The result is over-fermentation. Further, in the middle of the baking process for bread making, once the temperature of the bread is once increased, the bread may be insufficiently baked or the finish of the bread may be extremely deteriorated.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a heating device that can be easily restarted after being interrupted during heating.

<Means for Solving Problems> A problem solving means according to the present invention is a heating container 3 which is detachably mounted in a heating chamber 2, a driving unit 4 for heating and driving the heating container 3, and a driving unit. 4 is provided with a control device 5 for driving and controlling the heating device 4 in accordance with a series of preset cooking steps. The control device 5 includes a door switch 7 for detecting opening / closing of a door 6 of the heating chamber 2 and mounting of the heating container 3. The container presence / absence detector 24 for detecting the presence / absence of the container, and the closing signal from the door switch 7 and the container presence / absence detector 24 container after the driving unit 4 is stopped by the opening signal from the door switch 7 during the operation of the driving unit 4. The drive control means for automatically restarting the drive unit 4 only when both the signal and the output of the signal are present, and the remaining time of the process is set as the stop time depending on the content of the process performed when the door 6 is opened. Constant finishing means to adjust based on In which is provided.

<Operation> In the above problem solving means, when automatic cooking is performed using the container 3 for kneading and heating the food stored inside, the door 6 is opened once and the container 3 is taken out during the heating to complete the cooking process. Even if it is interrupted, the container 3 is set in the heating chamber 2 and the door 6 is closed again, so that the stroke heating is automatically restarted.

At this time, the setting of the heating time after the stroke is changed depending on the stroke performed when the door 6 is opened and the duration when the door 6 is opened. As a result, the influence of the stopping of the stroke on cooking is eliminated and the finish of cooking is made constant.

<Embodiment> An embodiment of the present invention will be described below with reference to the drawings. First
The drawings are views showing each process of bread cooking showing the first embodiment of the present invention, and the operation in each process is omitted. FIG. 2 is a functional block diagram of the control device, and FIG. 3 is an example of a flow chart and a time chart when making bread. In the example of FIG. 3, the time required from the start of heating to the baking includes heat retention. It's been 4 hours. FIG. 4 (a) is a cross-sectional view of the microwave oven with the heating container attached, and FIG. 4 (b) is a perspective view of the heating device.

As shown in the figure, the heating device of the present invention comprises a heating chamber 2 formed in a heating device main body 1, a heating container 3 which is detachably attached to the heating chamber 2, and a driving unit for heating and driving the heating container 3. Four
And a control device 5 for controlling the drive unit 4.

The control device 5 detects the opening / closing of the door 6 of the heating chamber 2, and the drive unit 4 is stopped by the open signal from the door switch 7 during the operation of the drive unit 4 and then the door switch 7 is closed. A control circuit 8 for automatically restarting the drive unit 4 by a signal is provided.

The heating container 3 is a mixture of bread ingredients, kneading and fermentation,
The firing and heat retention are all performed in the same container, and a stirring blade 10 for kneading is provided inside. Further, a microwave absorbing heat generating coating is formed on the outer peripheral portion of the heating container 3.

The driving unit 4 heats the heating container 3 to heat the heating container 3
A heating unit 11 for heating an object to be heated therein, and a rotation driving device 12 for rotating the stirring blade 10 in the heating container 3.
It consists of and.

The heating unit 11 includes a magnetron 13 and a waveguide 14 as shown in FIG.
It consists of and. The rotary drive device 12 includes a motor 15 installed in the heating device main body 1, a motor pulley 16 fixed to the motor shaft of the motor 15, and a drive shaft 17 rotatably supported on the bottom wall of the heating chamber 2. , A drive pulley 18 fixed to the lower end of the drive shaft 17, and a belt 19 wound around the pulleys 16 and 18.
And a connecting portion that connects the drive shaft 17 and the stirring blade 10.
It consists of 20 (coupling).

The door 6 is for opening and closing the front opening of the heating chamber 2 as shown in FIG.
Are arranged on the opening wall of the heating device main body 1 and the like.

A start switch 22 is arranged on the operation panel 21 on the front surface of the heating device main body 1.

The control circuit 8 is composed of a general one-chip microcomputer, and has a data RAM, a program ROM, and an ALU inside.
And so on. Then, as shown in FIG. 2, the control circuit 8 includes a detecting means 8a for detecting ON / OFF of the door switch 7 and the starting switch 22, and a heating control means for controlling the heating section 11 based on the detection result of the detecting means 8a. 8b and the detection means
The rotation control means 8c controls the rotation drive device 12 based on the detection result of 8a, and the timer means 8d controls the heating control means 8b and the rotation control means 8c based on the detection result of the detection means 8a.

The heating control means 8b and the rotation control means 8c have a function of outputting an operation stop signal in response to an open signal from the door switch 7 during heating by the heating container 3 and outputting an operation signal in response to a closing signal from the door switch 7 thereafter. Whether or not heating by the heating container 3 is being performed is determined by an ON operation signal of a pan cooking selection switch (not shown) provided on the operation panel or a container detection switch provided on the bottom wall of the heating chamber 2 or the like. (See FIG. 7).

Further, the heating control means 8b can change its output by outputting a pulse width modulation signal to a magnetron driving inverter circuit (not shown), thereby changing the heating temperature to the heating container 3. It can be so.

The timer means 8d stores the remaining time of each process when the heating by the heating container 3 is interrupted, and controls the heating control means 8b or the rotation control means 8c for the remaining time when restarting.

Next, the control will be described. FIG. 1 (a) shows the case where the door was not opened during heating, and FIG. 1 (b) shows the case where the door was once opened during heating. When the door is opened and closed again in the middle of the primary fermentation process in Fig. 1 (b),
In the conventional example in which the automatic start is not performed, the heating remains uninterrupted as shown in (a) in the figure unless the start switch 22 is pressed. However, the one having an automatic start function as in the present invention continues the heating without pressing the heating button as shown in (b), so that there is no failure due to erroneous operation or mischief of a child.

Next, a second embodiment of the present invention shown in FIGS. 5 to 8 will be described. FIG. 5 is a process diagram of bread cooking showing a second embodiment of the present invention. FIG. 6 is a functional block diagram of the control device, FIG. 7 is a sectional view of the heating device showing the arrangement of the container presence / absence detector, and FIG. 8 is an enlarged sectional view thereof.

As shown in the drawing, the control device 5 controls the door switch 7 for detecting the opening / closing of the door 6 of the heating chamber 2, the container presence / absence detector 24 for detecting the presence / absence of mounting of the heating container 3, and the operation of the drive unit 4 during operation. The drive unit 4 is stopped by the open signal from the door switch 7, and the drive unit 4 is automatically restarted only when both the closing signal of the door switch 7 and the container presence signal of the container presence / absence detector 24 are output thereafter. A control circuit 8 for outputting is provided.

That is, the control circuit 8 is set so that the heating is not restarted when the heating container 3 is not placed in the heating chamber 2 when the door is closed after the bread cooking is interrupted.

As shown in FIGS. 7 and 8, the container presence / absence detector 24 supports a detection tube 26 that can freely move in and out of a hole 25 in the bottom wall 2a of the heating chamber 2 and an outer peripheral flange 27 of the detection tube 26, and has one end. Is composed of a leaf spring-like holding plate 29 supported by the back surface boss 28 of the bottom wall 2a, and a container detection switch 30 which is turned on by the lowering operation of the holding plate 29.

In the figure, 31 is a contact of the container detecting switch 30, 32 is a mounting piece of the container detecting switch 30, 33 is a temperature detecting element, and 34 is its lead wire.

A bottom hole 35 is formed on the bottom surface of the heating container 3 so that the upper end portion of the detection tube 26 can be fitted therein.
When the 35 is fitted, the holding plate 29 is moved downward so as to abut the container detection switch 30.

Other configurations are similar to those of the first embodiment.

Next, the control will be described. If the container 6 is set in the heating chamber when the door 6 is once opened and the door 6 is closed again, the control is restarted. If the container 3 is not set in the heating chamber, the restart is not performed.

Whether or not the container 3 is set in the heating chamber is determined by the vertical position of the detection tube 26 of the container presence / absence detector 24. When the heating container 3 is set, the upper end of the detection tube 26 fits into the bottom hole 25 of the container 3 and is pushed downward. Therefore, the holding plate 29 is pushed downward, hits the container detection switch 30,
The switch 30 is turned on and sends the signal to the control circuit 8. Therefore, it is possible to prevent a malfunction at the time of restarting heating after the user intentionally interrupts.

Next, a third embodiment of the present invention will be described with reference to FIG. 9 (a) shows the case where the door was not opened during heating, FIG. 9 (b) shows the case when the door was opened during the kneading process, and FIG. 9 (c) shows the door during the primary fermentation process. In the case of opening, the same figure (d) shows the case where the door is opened in the middle of the secondary fermentation process, and the same figure (e) shows the case where the door is opened in the middle of the firing process. In the control circuit 8 of this embodiment, the drive unit 4
The drive unit 4 is stopped by the open signal from the door switch 7 during the operation of the above, and the drive unit 4 is automatically operated only when the closing signal from the door switch 7 and the container presence signal of the container presence / absence detector 24 are output thereafter. The drive control means for automatically restarting and the finishing constant means for adjusting the remaining time of the process based on the stop time according to the content of the process performed when the door 6 is opened are provided. It is configured to change the settings such as the cooking time after the cooking is restarted depending on the time when the cooking door was opened and the contents that were being carried out when the door 6 was opened. Other configurations are the same as those in the second embodiment. Is.

In FIG. 9, (A) to (E) indicate the time in each process,
(F) shows the total time in the case of (a) in the figure, and (A) shows the door 6
It shows the time that was opened. In addition, (') and (") in (A) to (D) show the time of each stroke carried out until the door is opened and the time carried out after the door is closed.

In FIG. 9 (b), when the door is opened in the middle of the kneading process, the time (A ′) (A ″) of the kneading process is made equal to A to prevent insufficient kneading. Therefore, the total time is (F) + (a).

In the same figure (c), the door is opened in the middle of the primary fermentation process. At this time, the fermentation action is continued while the door is opened (B ′) + (B ″). Is (B)-
The time (a) is sufficient, and the total time is also (F).

In the same figure (d), when the door is opened in the middle of the secondary fermentation process, and the dough temperature at this time is slightly higher than that at the time of the primary fermentation, considering that the dough temperature decreases during the time when the door is opened, (C ′) + (C ″) = (C) −α. Therefore, the total time is (F) + (b) −α.

In the figure (e), when the door is opened during the firing process, heating is performed at a temperature of around 150 ° C. in the firing process.
+ (D ″) = (D) + β, and the total time is (F) + (a)
It is set to + β.

Therefore, even if the door is open for a relatively long time,
It is possible to have a uniform finish.

Next, a fourth embodiment of the present invention shown in FIGS. 10 to 12 will be described. FIG. 10 is a functional block diagram of the control device of the present invention, FIG. 11 is a control circuit diagram, and FIG. 12 is a flow chart.

As shown in the figure, the control device 5 of the present invention includes a door switch 7 for detecting the opening / closing of the door 6 of the heating chamber 2, a notifying unit 38 for notifying an abnormality, an open signal from the door switch 7 or a container presence / absence detector 24 A control circuit 8 that outputs a notification command signal to the notification unit 38 when there is no signal is provided. That is,
The control circuit 8 has a notification control means 8e in addition to the means of the second embodiment. As shown in FIG. 11, the notification unit 38 includes a relay coil 40a connected to the output end of the control circuit 8, a relay contact 40b that is turned on / off by the relay coil 40a, and a notification buzzer connected in series to the relay contact. It consists of 41 and. In the figure, 43 is a latch switch, and 44 is a monitor switch. The other structure is similar to that of the second embodiment.

In the above configuration, a heating container 3 for kneading and heating bread or the like
When the container is placed in the heating chamber, the container detection switch 26 is turned on. At this time, if the door 6 is open at the same time, the door switch 7 is turned off, and a signal is sent from the control circuit 8 to the relay coil 40a. The coil 40a is energized,
The buzzer 41 sounds as a notification sound.

The above operation is not only during heating but also before heating,
This is also performed when the heating container 3 is forgotten to be placed in the heating chamber and the door is closed.

On the other hand, the above operation is not performed during high frequency heating.

Therefore, when making bread or the like, it is not necessary to forget to put the heating container 3 in the heating chamber. Therefore, it is possible to prevent over-fermentation or insufficient baking caused by the interruption of heating by opening the door during the process in which the cooking time influences the finish, such as the fermentation and baking process for bread making.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

The means for notifying the user is not limited to the buzzer 3 switched by the relay 3 as described above.

<Effect of device> As is apparent from the above description, according to the present invention, when automatic cooking is performed using a container for kneading and heating the food stored inside, open the door once and take out the container during heating. Even if the heating is interrupted, heating can be restarted automatically just by setting the container in the heating chamber and closing the door again, so that heating can be continued without pressing the start switch to prevent idling and prevent incorrect operation. Failure due to mischief or child mischief disappears.

Moreover, when restarting, based on the stroke that was being performed when the door was opened and the time when the door was opened,
By changing the setting of the heating time after that process,
When making bread or the like, it is possible to prevent over-fermentation or insufficient baking caused by opening the door and interrupting heating during the process of making the baking, such as the fermentation and baking processes that affect the finishing time.

Therefore, even if the door is open for a relatively long time,
It can have a consistent finish.

[Brief description of drawings]

FIG. 1 is a diagram showing each step of bread cooking showing the first embodiment of the present invention, FIG. 2 is a functional block diagram of its control device, and FIG.
The figure shows a flow chart and a time chart when making bread, FIG. 4 (a) is a sectional view of the microwave oven showing a state in which a heating container is attached, FIG. 4 (b) is a perspective view of the heating device, and FIG.
Fig. 6 is a process diagram of bread cooking showing a second embodiment of the present invention,
Fig. 7 is a functional block diagram of the control device, Fig. 7 is a sectional view of the heating device showing the arrangement of the container presence / absence detector, Fig. 8 is its enlarged sectional view, and Fig. 9 (a) is the third embodiment of the present invention. In the example, the case where the door was not opened during heating, the figure (b) shows the case where the door was opened during the kneading step, and the figure (c) shows the case where the door was opened during the primary fermentation step. The same figure (d) shows the case where the door is opened during the secondary fermentation process, and the same figure (e) shows the case where the door is opened during the baking process. FIG. 11 is a functional block diagram of the control device of the fourth embodiment, FIG. 11 is a control circuit diagram, and FIG. 12 is a flow chart. 1: heating device main body, 2: heating chamber, 3: heating container, 4: drive unit, 5:
Control device, 6: Door, 7: Door switch, 8: Control circuit, 24:
Container presence / absence detector, 38: Notification unit.

Claims (1)

[Scope of utility model registration request] 1. A heating container that is detachably mounted in a heating chamber, a driving unit that heats and drives the heating container, and a control device that drives and controls the driving unit according to a series of preset cooking steps. The control device comprises a door switch for detecting opening / closing of a door of a heating chamber, a container presence / absence detector for detecting presence / absence of mounting of the heating container, and an opening signal from the door switch during operation of the driving unit. Drive control means for automatically restarting the drive unit only when both the closing signal from the door switch and the container presence signal of the container presence / absence detector are output, and when the door is opened A heating device provided with a finishing constant means for adjusting the remaining time of the process based on the stop time according to the contents of the process being performed.