JP2581801B2 - Turntable equipment - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turntable device such as a microwave oven, and more particularly to a turntable device having a feature regarding how to stop the rotation thereof.

[Conventional technology]

A case of a turntable device used in a microwave oven will be described below as an example of this type of conventional technology.

In the conventional turntable device, the rotation position of the turntable is detected by some position detection device, and based on this, when the heating cooking is completed and the rotation of the turntable is stopped, the rotation position of the turntable is changed to the position before the rotation is started. It is controlled to be the same as the rotation position.

FIG. 3 shows a conventional example of this type of apparatus. FIG. 3 is an explanatory view showing an outline of a microwave oven used for a conventional turntable device.

In FIG. 3, (1) is an outer casing, (2) is a heating chamber, and (3) is a turntable, on which a cooking container (4) on which an article to be cooked is placed is placed and a rotating shaft (3a) is set during cooking time. ). The cooking container (4) is provided with a handle (4a) for easy carrying and taking out. (5) is a motor as driving means for rotating the turntable (3), and (6) is a disk mounted on the rotating shaft (3a) in parallel with the turntable (3). An elliptical light transmitting portion (6a) is provided at one edge of the.
(7) is a light-emitting element, (8) is a light-receiving element, (9) is a motor control device that controls the operation of the motor (5) by inputting a signal from the light-receiving element (8), and (10) is a cooking time and the like. An input switch for setting and operating the microwave oven.

Next, the operation will be described with reference to FIGS. 3, 4, and 5. FIG. FIG. 4 is an explanatory view showing an example of a state where the cooking container (4) is placed on the turntable (3) of the microwave oven shown in FIG. In FIG. 4, (11) is an opening for taking the cooking container (4) into and out of the heating chamber (2), and (12) is a door for opening and closing the heating chamber (2). FIG. 5 is a flowchart showing the operation of the microwave oven.

When cooking an article to be cooked (hereinafter, appropriately referred to as a dish) by using a microwave oven, first, the door (12) is opened, and a cooking container (4) containing the dish is placed on the turntable (3). At this time, the user puts the handle (4a) of the cooking vessel (4) in the heating chamber (2) as shown in FIG. 4 in order to easily put the cooking vessel (4) in and out of the heating chamber (2). The cooking vessel (4) is placed with the cooking container (4) facing the side close to the opening (11). In this state, the door (12) is closed and heating is started.

As shown in step S ₁ in the flowchart of FIG. 5,
When the input switch (10) is operated to set and input the cooking time, the microwave oven starts heating and cooking, and the motor (5) rotates the turntable (3) in a constant rotation direction at a constant speed. In this example, the turntable (3) makes one rotation in 10 seconds. When the turntable (3) rotates,
As shown in step S _2, the turntable (3) and the light transmitting portion provided in the same axis of rotation disc that rotates about the (3a) (6) (6a) once the light emitting element 10 seconds (7 ),
Each time, the light receiving element (8) receives the light from the light emitting element (7). Receiving light-receiving element (8) is a motor control device (9) in step S ₃ by entering a signal indicating that it has received to the motor control device (9), in the elapsed time from the start cooking time set based calculates the remaining cooking time T ₀ at that time. If the remaining cooking time T ₀ is less than 10 seconds, that is, when the turntable (3) reaches the cooking time before the other one rotation, the process proceeds to step S _4. Motor controller in step S ₄ (9) the remaining cooking time T ₀
The turntable (3) is stopped at the time of (2). Steps
In S _3, if the remaining cooking time T ₀ which is calculated is not less than 10 seconds, the process proceeds to step S _5. In step S _5, the motor controller (9) to continue rotating the motor (5) drives the turntable (3). Advances to the turntable (3) is the step S ₂ again Continuing the rotation, the light transmission section provided in the disc (6) (6a) is to cross the light-emitting element (7).

By controlling the rotation of the turntable (3) by the operation described above, the turntable (3) stops at the same rotation position as the stop position before the rotation start when the heating and cooking are completed and the rotation is stopped. Become. That is, when the cooking container (4) is placed as shown in FIG. 4 before the start of the heating cooking by the microwave oven, the cooking container (4) at the end of the heating cooking as well as before the start of the heating cooking as shown in FIG. The user stops at the rotation position and the handle (4a) of the cooking container (4) faces the side near the opening (11) of the microwave oven, so that the user can easily take out the cooking container (4).

[Problems to be solved by the invention]

In the conventional turntable device as described above, since the physical rotation position of the turntable is detected, for example, a user or the like is required between the time when the turntable stops once and the time when the next turntable starts rotating. If the rotation position of the turntable is shifted by mistake, the timing of the first rotation position detection after the rotation starts and the actual
There is a problem in that an error occurs in the rotation timing and the stop position of the turntable at the end of the operation of the device is different from a desired rotation position.

Also, in order to stop the turntable at a desired rotation position, some position detection mechanism for detecting the rotation position of the turntable is provided.

As a result, the turntable device as a whole has a complicated structure, and the number of parts increases, so that there is a problem that the production work is troublesome and costly.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, without providing a position detecting mechanism for detecting the rotational position of the turntable, and what kind of rotational position the turntable has at the start of rotation. Regardless of the above, an object of the present invention is to provide a turntable device capable of stopping a turntable at a rotation position at the start of rotation.

[Means for solving the problem]

A turntable device according to a first aspect of the present invention includes a turntable, a driving unit that rotates the turntable,
A drive control means for controlling the operation of the drive means, and a calculation based on a reference rotation time required for one turn of the turntable and a preset scheduled rotation period from the start of rotation to the stop of rotation, Stop time calculating means for setting a time closest to the scheduled rotation time as a new rotation time out of an integral multiple of the reference rotation time, and the drive control means includes a new drive time set by the stop time calculation means. The driving means is controlled based on the rotation period.

Also, a turntable device according to a second aspect of the present invention provides a turntable, a drive unit for rotating the turntable, a drive control unit for controlling the operation of the drive unit, and a drive unit for rotating the turntable once. A calculation is performed based on the required reference rotation time and the elapsed time from the start of rotation to the point in time when the interrupt stop signal is input during rotation, and the time closest to the elapsed time out of the integral multiple of the reference rotation time elapses. And a stop timing calculating means for setting the rotation stop time at the time when the rotation is stopped. The drive control means controls the drive means based on a calculation result of the stop timing calculation means.

[Action]

The turntable device according to the first invention rotates the turntable with a time closest to the scheduled rotation period as a new rotation period out of an integral multiple of the reference rotation time required for the turntable to make one rotation. The table is stopped at the same rotation position as the rotation position at the start of rotation.

Further, the turntable device according to the second aspect of the present invention is configured such that, when heating cooking is interrupted during rotation of the turntable and the cooking container is taken out, until a time that is an integral multiple of the reference rotation time elapses, Is rotated until it reaches the same rotation position as the rotation position at the start of rotation, and then stopped.

〔Example〕

Hereinafter, embodiments of the present invention will be described. FIG. 1 is an explanatory view showing an outline of an embodiment of a microwave oven using a turntable device according to the present invention, and FIG. 2 is a flowchart showing an operation of the microwave oven of this embodiment.

In this embodiment, a case will be described in which control is performed to stop the turntable (3) at the same rotational position as at the time of stopping before the start of heating cooking, at the end of heating cooking.

Although setting a schedule cooking time T ₁ before starting cooking, the planned cooking time T ₁ is a function of the expected rotation period will the time of the rotation stopping or start of rotation of the turntable (3) It is assumed that

In FIG. 1, reference numerals (1) to (5), (9), (10)
Shows the same or corresponding parts as those of the conventional example, and the explanation is omitted as appropriate.

(13) is a stop timing calculation device, and the input switch (1
0) is input planned cooking time T ₁ by, or is scheduled cooking time T _1, the motor (5) is an integral multiple of the reference rotation time T _R requiring turntable (3) to cause one revolution It is determined based on the calculation whether or not it is not. However, the reference rotation time T _R
Is a fixed value. The scheduled cooking time T ₁ is the reference rotation time T _R
If it is an integral multiple of, the scheduled cooking time entered
Let T ₁ be the optimal rotation period for rotating the motor (5), that is, the turntable (3). Also when the scheduled cooking time T ₁ is not an integral multiple of the reference rotation time T _R is calculated by calculating the reference rotation time T _R closest time has been scheduled cooking time T ₁ input at time an integral multiple of and the time and optimal rotation period T ₂ is a new rotational period. A motor control device (9) is different from the motor control device of the prior art described above, and drives and stops the motor (5) based on an input from the stop timing calculation device (13).

In this embodiment, the motor (5) is a synchronous motor.

Next, the operation of the microwave oven using the turntable device of this embodiment will be described with reference to FIGS. 1, 2, and 4. FIG.

First, as shown in FIG. 4, the user places the handle (4a) on the turntable (3) with the handle (4a) facing the side close to the opening (11) so that the cooking container (4) can be easily taken out, and the door (12). Close.

As shown in step S ₁₁ in this state, to set and enter the planned cooking time T ₁ by an input switch (10). With this operation, the microwave oven starts heating and cooking, and the turntable (3) starts rotating. Planned cooking time T ₁ which is input by the input switch (10) is inputted to the stop timing computing device as shown in step S ₁₂ (13). Then step S
Stop timing computing unit in the ₁₃ (13), the input scheduled cooking time T ₁ is determined to based on calculation whether an integer multiple of the reference rotation time T _R of the turntable (3) is a fixed value If it is determined that the value is an integral multiple, step S
Proceed to ₁₄ . In step S _14, the rotation period for rotating the planned cooking time T ₁ turntable (3) actually, the time from start of rotation of the turntable (3) up to the point of time T ₁ has elapsed, the turntable (3) the set as optimal rotation period for stopping at the same rotational position and the rotational position before the start of rotation, the process proceeds to step S _15. Stop timing computing unit in step S ₁₅ (13) outputs the result to the motor control device (9). That is, to drive the motor during the rotation period T ₁ in which the motor control device (9) is newly set (5), and outputs any control amount corresponding to the rotation period T _1. Motor control device (9) as the basis of the inputted calculation result, in step S _16, the turntable (3)
After the rotation start, stop motor (5) when the time has T ₁ elapses, i.e. to stop the rotation of the turntable (3).

As an example, the scheduled cooking time T ₁ is 30 seconds and the reference rotation time T _R
Is 10 seconds, the turntable rotation is as follows.

T ₁ / T _R = 30 sec / 10 sec = 3 times a new rotation period from the reference rotation time T _R is 10 seconds Here, 3 times × 10 sec = 30 sec next heated and turntable synchronously Be driven.

On the other hand, termination timing computation unit in step S ₁₃ (13)
, The input scheduled cooking time T ₁ is the turntable (3)
If it is determined that it is not an integral of the reference rotation time T _R of the proceeds to step S _17. In step S _17, obtained by calculation termination timing computation unit (13), the reference rotation time T value nearest T ₂ to the value of the planned cooking time T ₁ by an integer multiple of _R, step
It advances to S _18. In step S _18, sets start of the rotation of the turntable (3) the time until the point of time T ₂ has elapsed, a new optimal rotation period is a rotation period obtained based on the planned cooking time T _1, step It advances to S _19. Stop timing computing unit in step S ₁₉ (13), the motor control device (9)
The calculation result is output to. That is, the motor for rotating the period T ₂ in which the motor control device (9) is newly set (5)
To drive, and outputs any control amount corresponding to the rotation period T _2. Motor control device (9) is based on the input operation result, as shown in step S _16, after the start of the turntable (3) rotation, to stop the rotation of the turntable (3) when the time has T ₂ has elapsed .

As an example, when cooking expected time T ₁ is 33 seconds rotation of the turntable is as follows.

The T ₁ / T _R = 33 sec / 10 sec = 3.3 times rounding them if 3 times.

Here new rotation period from the reference rotation time T _R is 10 seconds, 3 times × 10 sec = 30 sec next heated and the turntable is operated synchronously.

In addition, if the cooking schedule time T ₁ is 35 seconds, the rotation of the turntable is expressed by the following equation.

T ₁ / T _R = 35 seconds / 10 seconds = 3.5 times Rounded to 4 times.

Here new rotation period from the reference rotation time T _R is 10 seconds, 4 times × 10 sec = 40 sec next heated and the turntable is operated synchronously.

As described above, in the turntable device according to this embodiment, in order to perform on the basis of the control of the rotation-stopped cooking time T ₁ and the reference rotation time T _R of the turntable (3), at the start of cooking, i.e. Regardless of the rotation position of the turntable (3) at the start of rotation, the turntable (3) can be stopped at the same rotation position as at the start of rotation at the end of heating and cooking. For this reason, the user can take out the cooking container (4) in an easy-to-take-out state after the completion of the heating cooking without worrying about the rotation position of the turntable (3) at the start of rotation.

In addition, there is no need to provide any position detection mechanism for detecting the rotational position of the turntable (3), and there is an auxiliary effect that the structure of the entire turntable device is simplified.

In the above embodiment, the case in which the turntable (3) is stopped at a desired rotation position, for example, at the same rotation position as when starting rotation is at the end of heating and cooking is described. When cooking is interrupted at any time during cooking, that is, during rotation of the turntable (3), and the cooking container (4) is taken out, the door (12) is also used.
It is also possible to control the turntable (3) to rotate until it reaches a desired rotational position and then stop even after the heating operation is interrupted by opening the door.
Similar effects can be obtained. In this case, a switch (not shown) that is turned on and off in conjunction with opening and closing of the door (12) is provided, and the operation of opening the door (12) causes the stop timing calculating device (13) to turn the turntable (13). The configuration is such that an interrupt stop signal for stopping 3) is input.

In each of the above embodiments, the case where the desired rotation position for stopping the turntable (3) is the same as the rotation position at the time of starting rotation is described. However, as another embodiment, the turntable (3) is used. It is also possible to stop at a rotation position different from the rotation start time, for example, a rotation position different by 90 ° from the rotation start time, and according to various conditions such as the number of handles (4a) of the cooking container (4), Turntable (3)
There is an advantage that it is also possible to set the stop position of.

As an example, cooking expected time T ₁ is 30 seconds, the reference rotation time T _R is
If it is 10 seconds and the 90-degree rotation stop position is rotated more than at the start, it will be 1/4 rotation, and it will be as follows.

T ₁ / T _R = 30 sec / 10 sec = 3 times +1/4 times new rotation period from the reference rotation time is T _R is 10 seconds Here, 3 times × 10 seconds +1/4 times × 10 seconds = 32.5 seconds, and the heating and the turntable are operated in synchronization.

〔The invention's effect〕

According to the first aspect, it is possible to stop the turntable at the same rotation position as the rotation position at the start of rotation, regardless of the rotation position at the start of rotation. For example, when a cooking container having a handle such as a coffee cup, a frying pan, or a pan is used, the position of the handle at the time of removing the cooking container can be the same as the position at the time of placing, and the cooking container can be easily removed. Further, there is no need to provide any position detection mechanism for detecting the rotational position of the turntable, and there is an auxiliary effect that the structure of the entire turntable device is simplified.

Further, according to the second aspect, even when heating cooking is interrupted during rotation of the turntable and the cooking container is taken out, the turntable can be stopped at the same rotation position as the rotation position at the start of rotation. .

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view showing an outline of an embodiment of a microwave oven using a turntable device according to the present invention, and FIG.
FIG. 3 is a flowchart showing the operation of the microwave oven of the embodiment shown in FIG. 3, FIG. 3 is an explanatory view showing an outline of a microwave oven using a conventional turntable device, and FIG. 4 is a microwave oven shown in FIG. 1 and FIG. And FIG. 5 is a flowchart showing the operation of the conventional microwave oven shown in FIG. In the figure, (3) is a turntable, (5) is a motor, (9) is a motor control device, and (13) is a stop timing calculation device. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (2)

(57) [Claims] 1. A turntable, a drive means for rotating the turntable, a drive control means for controlling the operation of the drive means, a reference rotation time required for one turn of the turntable and a start of rotation A stop time calculating means for performing a calculation based on a preset scheduled rotation period until the rotation is stopped, and setting a time closest to the scheduled rotation period as a new rotation period among integer times of the reference rotation time; and Wherein the drive control means controls the drive means based on a new rotation period set by the stop timing calculation means. 2. A turntable, a drive means for rotating the turntable, a drive control means for controlling the operation of the drive means, a reference rotation time required for one turn of the turntable and the start of rotation. Calculation is performed based on the elapsed time until the interrupt stop signal is input during rotation, and the time when the time closest to the elapsed time has elapsed among the integral multiples of the reference rotation time is the rotation stop timing. A turntable device, comprising: a stop time calculating means, wherein the drive control means controls the drive means based on a calculation result of the stop time calculating means.