JP2639992B2 - Electric device having a turntable - Google Patents

Description

The present invention relates to an electric device such as an electric range having a turntable.

(B) Conventional technology In the microwave oven disclosed in Japanese Patent Application No. 63-234132, the position of the food placed on the turntable in the heating chamber is the same at the end of microwave heating. A configuration is adopted in which the turntable is rotated substantially natural times several times with microwave heating. Therefore, when the food is placed on the turntable, which is easy to place on the turntable, when the food is placed on the turntable, the food is placed on the turntable in the heating chamber at the end of the microwave heating. The stop of the turntable is performed so that the food is taken out from the turntable as easily as the placement.

As described above, since the turntable is rotated about a natural number of times, when the turntable is rotated, for example, 10.5 times at the end of the microwave heating, the turntable is rotated a natural number of times, that is, 11 times after the end of the heating. The table rotates.

The above-mentioned microwave oven disclosed in Japanese Patent Application No. 63-234132 is further capable of heating a heater, and the heater is also rotated about a natural number of times.

In this case, as one control mode, the control mode in which the inside of the heating chamber is preheated prior to heating the heater, and then the food is placed on the turntable in the heating chamber and the heater is heated, the food is turned on when the preheating is completed. It is necessary to stop the rotation of the turntable at the stage of mounting on it, but also in this case, if the turntable is rotated a non-natural number of times like 10.5 times, it will be further rotated until it turns a natural number of times You.

Therefore, even if the food is to be placed on the turntable immediately after the completion of the preheating, the food cannot be placed until the turntable rotates and stops several times naturally, and the user has to wait for several seconds during this time, and the workability is poor.

Alternatively, in the case where the door is opened immediately to place the food upon completion of the preheating and the heating chamber is opened, the inside of the heating chamber that has been preheated rapidly cools during the waiting time.

(C) Problems to be Solved by the Invention The present invention is based on a configuration in which a turntable is rotated substantially naturally several times with control of a heating drive or the like so that an object such as food can be easily taken out at the same time as placing. Thus, if necessary, an object can be immediately mounted on the turntable when the control is stopped, thereby improving workability and the like.

(D) Means for Solving the Problems An electric device having a turntable according to the present invention includes a storage, a turntable arranged in the storage, for rotating an object to be placed, and a desired treatment for the object. Object treatment device for performing, and means for driving and controlling the object treatment device,
Means for rotating the turntable approximately a natural number of times with the drive control of the object treatment device, a setting unit for setting the drive control mode of the object treatment device, and setting of a predetermined drive control mode by the setting unit. When the drive control of the object treatment device is stopped after the start, the rotation of the turntable is immediately stopped.

(E) Function Normally, the turntable rotates substantially naturally several times in accordance with the drive control of the object treatment device.

Thus, when the predetermined drive control mode is set, when the drive control is stopped after the start, the turntable is immediately stopped irrespective of the rotation of the turntable approximately a natural number of times.

(F) Embodiment FIG. 1 shows a structure of a microwave oven according to an embodiment of the present invention. A microwave oven is supplied with a microwave from an object treatment device, that is, a magnetron (1). , A turntable (4) for rotating the placed object, that is, the food (3) is arranged. The turntable is engaged and connected to an output shaft (6) of a synchronous motor (5) with a built-in speed reducer fixed to a lower side of the heating chamber (2), and the turntable is driven by the synchronous motor (5). The table (4) is rotated.

FIG. 2 shows a circuit of the microwave oven, and a microcomputer (7) for controlling the microwave oven is provided. The microcomputer (7) includes a setting unit for setting heating conditions and the like, that is, a keyboard (8), and a door (not shown) for opening and closing a front opening of the heating chamber (2).
Door switch (9) that turns off and on in response to
Hz commercial power supply, and input various desired signals from a pulse generator (10) or the like that generates the same frequency pulse as the power supply.
The magnetron (1) for oscillating microwaves for microwave heating of the food (3), another object treatment device for performing heater heating in addition to microwave heating, that is, a heater (11), and the turntable (4). ) To rotate the synchronous motor (5), and a buzzer (1
2) Output control etc.

FIG. 3 shows a flowchart of a control program of the microcomputer (7), and the operation of the microwave oven will be described in detail with reference to the flowchart.

When the commercial power supply to the microwave oven is turned on, step S1 is executed first, the application of the commercial power supply to the synchronous motor (5) is prohibited, and the turntable (4) is kept in a rotation stopped state. Further, the operation flag KF in the computer (7)
Is reset and 600 is set to the counter CNT in the computer (7). In the next S2 step, it is determined whether or not a pulse of 60 Hz has been generated from the pulse generator (10). When a negative determination is made, step S3 is executed, and the operation plug KF is examined to determine whether or not the heating plug is currently being heated. In this case, it is determined that the operation flag KF is in the reset state and is not being heated, and subsequently, step S4 is executed. In this step, the door is closed, the door switch (9) is turned on, the heating condition is set by the keyboard (8), and it is determined whether or not the start key is operated. In the present case, these series of operations have not been performed, so that the steps S2, S3, and S4 are thereafter performed in a cyclic manner.

When a 60 Hz pulse is generated from the pulse generator (10), step S5 is executed, and the content of the counter CNT is decremented by one. In the next S6 step, it is determined whether or not the content of the counter CNT thus subtracted becomes zero. If a negative determination is made, steps S3 and S4 are sequentially executed, and then S2 and S4 are performed until the value of the counter CNT becomes zero.
3. The cyclic execution of step S4 or the cyclic execution of steps S2, S5, S6, S3, and S4 is performed.

In the circulation execution, when the content of the counter CNT becomes 0, step S7 is executed and a new 600 is added to the counter CNT.
Is set. The next S8 step is the same as the above S3 step. In this case, if a negative determination is made, S8a, S3, S8
After 4 steps, return to the S2 step. In step S8a,
If the turntable (4) is already rotating,
The application of the commercial power to the synchronous motor (5) is stopped, and the turntable (4) stops rotating. When returning to the step S2, the counter CNT is 600, which is exactly the same as the case immediately after the power is turned on, and thereafter the operation immediately after the power is turned on is repeated. This state is called an initial state.

In order to perform the microwave heating control mode, the food (3) is placed on the turntable (4) in the heating chamber (2) and the door is closed (the door switch (9) is turned on),
When the desired microwave time is set on the keyboard (8) and the start key is operated, the step S9 is executed after the step S4, and the one-turn flag TF in the computer (7) is reset. In the next S10 step, it is determined whether or not a preheating course is to be performed. In this case, it is not the preheating course, so that the step S11 is subsequently executed and the one-turn flag TF is set. In the next S12 step, the operation flag KF is set. In the next step S13, application of commercial power to the synchronous motor (5) is performed, and it is determined whether or not the turntable (4) is rotating.
If it is not rotating, the counter C is set in step S14.
NT is set to 600, commercial power is applied to the synchronous motor (5) in step S15, the turntable (4) starts rotating, and in this case the magnetron (1) is driven to start microwave heating. You.

Thereafter, while the pulse generator (10) does not generate a 60 Hz pulse, steps S2, S3, and S16 are cyclically executed. S16
In the step, it is determined whether the heating time or the like has elapsed. Then, every time a 60 Hz pulse is generated from the pulse generator (10), the steps S2 to S5, S6 (or S5,
After steps S6, S7 and S8), steps S3 and S16 are executed.

During such runs, as microwave time elapses,
Step S17 is executed, and in this case magnetron (1)
Is stopped and microwave heating is terminated, and a buzzer (12) is sounded to notify the end of heating.
Further, the operation flag KF is reset. In the next step S18, it is determined whether or not the one-turn flag TF has been set. Since the one-rotation flag TF is set in step S11, after returning to step S2, steps S2, S3, and S4 are cyclically executed while no 60 Hz pulse is generated from the pulse generator (10). Then, every time a 60 Hz pulse is generated, steps S3 and S4 are performed from step S2 through steps S5 and S6. During such an execution, the counter CN
When the content of T becomes 0, the step S8a is executed from the step S6 through the steps S7 and S8, the application of the commercial power to the synchronous motor (5) is stopped, and the turntable (4) stops rotating. Thereafter, the above initial state is executed.

Here, in step S15, with the start of microwave heating, commercial power is applied to the synchronous motor (5) and the turntable (4) starts rotating.
The content of T becomes 600 (S14 step). During heating, the subtraction from 600 is repeated in the counter CNT. Therefore, if the content of the counter CNT is not reduced to 0 at the end of heating in step S17, the counter will be continued thereafter.
Until the content of the CNT becomes 0, the application of the commercial power to the synchronous motor (5) is continued, and the rotation of the turntable (4) is continued. When the content of the counter CNT becomes 0, the turntable (4) stops rotating. As described above, the turntable (4) rotates with heating, and stops rotating when the counter CNT has counted 600 natural times.

The fact that the counter CNT counts 600 is 60Hz
This means that 600 pulses have been generated and 10 seconds have elapsed. On the other hand, when the frequency of the applied commercial power is constant, the synchronous motor (5) has a characteristic that its rotation speed is constant, and the time for which the turntable (4) makes one rotation is constant. As mentioned above, the commercial power frequency
When the frequency is constant at 60 Hz, one rotation time of the turntable (4) is 10 seconds.

Therefore, as described above, when the counter CNT counts 600 a natural number of times, it means that the turntable (4) has rotated a natural number of times. In this way, the turntable (4) rotates and stops several times naturally, so that when the food (3) is placed on the turntable (4), it is easy to place the food (3) forward in the heating chamber (2). If the food (3) is placed on the turntable (4), the food (3) will be located closer to the front in the heating chamber (2) even after the heating is completed, and the removal of the food will be Easier to do as well.

Next, when performing the heater heating control mode, the food (3) is placed on the turntable (4) in the heating chamber (2), the door is closed (the door switch (9) is turned on), and the keyboard is turned on. At (8), the desired heater time is set and the start key is operated. In this case, the operation is almost the same as that in the microwave heating control mode, except that the heater (11) is driven in place of the magnetron (1) in step S15 and the heater heating is started, and the step S17 is performed in this manner. There is a slight difference in that the heater heating ends.

Accordingly, the turntable (4) similarly rotates and stops several times naturally, so that the removal of food becomes easy as in the case of placing.

Now, in the case of a control mode in which the interior of the heating chamber (2) is preheated prior to the heating of the heater, and then the food (3) is placed on the turntable (4) in the heating chamber (2) and the heater is heated, First, the door is closed without putting food in the heating chamber (2) (the door switch (9) is turned on), and the keyboard (8)
, Set the desired preheating time and desired heater time, and operate the start key.

Then, the step S10 is executed from the initial state through the step S9. At this time, it is determined that the preheating course is to be performed. After that, based on such judgment, S1
S12 step is executed after skipping one step, S13, S1
4. Steps S15 are sequentially executed. In step S15, the heater (11) is driven to start preheating the heating chamber (2).

Thereafter, while the pulse generator (10) does not generate a 60 Hz pulse, the steps S2, S3, and S16 are circulated, and every time a 60 Hz pulse is generated, the steps S2 to S5, S6 (or S5, S6, S7, S8) The steps S3 and S16 are executed after the step).

If the preheating time elapses during such an execution, the driving of the heater (11) is stopped in step S17 to end the preheating, and the buzzer (12) notifies the end of the preheating. In the subsequent S18 step, it is determined that the one-rotation flag TF is not set (since the S11 step is skipped as described above and the one-rotation flag TF is not set), and then the S19 step is executed. In this step, when the application of the commercial power to the synchronous motor (5) is stopped and the heater (11) is stopped after the start of the drive (11) irrespective of whether the turntable (4) has rotated a natural number of times (preheating end). At the time).

Therefore, immediately after the preheating is completed, the door is opened and the heating chamber (2) is opened.
The food (3) can be placed on the turntable (4) in the inside.

Thereafter, the above initial state is executed. In this state, when the food (3) is placed, the door is closed, and the start key is operated again with the keyboard (8). Thereafter, the heater is heated after preheating (the same as the above-described heater heating control mode).
At this time, the turntable (4) rotates by a natural number of times and stops, so that the food can be easily taken out as in the case of placing.

In the above embodiment, the preheating is terminated when a preset preheating time elapses, but the preheating is terminated by estimating the place where the preheating has been performed and opening the door and turning off the door switch (9). It is also possible. In this case, in step S16, it is checked whether or not the door switch (9) has been turned off, instead of checking whether the preheating time has elapsed.

(G) Effects of the Invention According to the present invention, normally, the object treatment device is driven and controlled in a drive control mode set by the setting unit to rotate the turntable approximately a natural number of times. When the drive control form is set, when the drive of the object treatment device is stopped, the rotation of the turntable is immediately stopped.Therefore, the turntable naturally rotates several times as in the related art only in the predetermined drive control form. There is no need to wait until the machine stops, thereby improving workability.

[Brief description of the drawings]

1 is a sectional view, FIG. 2 is a circuit diagram, and FIG. 3 is a flowchart of a control program. (1) ... magnetron, (2) ... heating chamber, (4) ...
... turntable, (7) ... microcomputer,
(8) ... keyboard, (11) ... heater.

Claims (1)

(57) [Claims] 1. A storage, a turntable disposed in the storage for rotating an object to be placed, an object treatment device for performing a desired treatment on the object, and drive control of the object treatment device Means, and means for rotating the turntable approximately a natural number of times with the drive control of the object treatment device,
A setting unit for setting a drive control mode of the object treatment device, and setting of a predetermined drive control mode by the setting unit, wherein when the drive control of the object treatment device is stopped after starting, the rotation of the turntable is immediately performed. And an electric device having a turntable.