JPH07318073A - Microwave range with oven toaster function - Google Patents

Abstract

PURPOSE:To carry out a concentrated heating, upon toaster cooking suitable therefor, and to carry out a uniform heating, upon oven cooking, suitable there for. CONSTITUTION:Heaters 4, 5 and 6 are provided on the upper part and the lower part of a heating chamber 2 to which microwave is fed. The lower heater 6 is attached to the driving shaft 11 of a rotary driver 9 so that the heater 6 is rotated upon oven cooking and rests upon toaster cooking. The plane shape of the lower heater 6 is semi-circular so as to be suitable for rotation and obtain a sufficient heating area. Further, the rotary driver 9 is also used as a means for rotating a rotating disk upon microwave cooking. The lower heater 6 is disposed in the heating chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven with an oven / toaster function in which a lower heater is movable.

[0002]

2. Description of the Related Art Conventionally, in a microwave oven with an oven / toaster function, heaters are provided above and below a heating chamber to which microwaves are supplied. However, in the case of this product, when the oven cooking is performed using a square top plate (shelf) that completely partitions the heating chamber, the lower heater is used so that the food on the top plate can be heated uniformly. Is sized and shaped to cover almost all of the bottom of the heating chamber.

[0003]

However, according to the lower heater as described above, since the power density with respect to the area cannot be increased, the temperature rise in the lower portion of the heating chamber is slow,
In particular, there is a problem that it takes time to cook the toaster.

On the other hand, there is also one in which the lower heater has a size and shape that covers half of the bottom surface of the heating chamber to increase the power density. However, with this type, the heating chamber cannot be heated uniformly, so when cooking in the oven, a circular top plate is used, and heating is performed while rotating this. However, the circular top plate has a drawback that the amount of food that can be placed is smaller than that of the square top plate, and thus the amount that can be cooked at one time is small.

The present invention has been made in view of the above-mentioned circumstances, and therefore an object thereof is excellent in that toaster cooking can be carried out in a desired short time, and that many foods can be cooked in an oven at one time. To provide a microwave oven with oven and toaster function.

[0006]

In order to achieve the above object, the microwave oven with an oven / toaster function according to the present invention has a heating chamber to which microwaves are supplied, having heaters at the upper and lower portions thereof. So, attach the lower heater to the rotary drive and rotate it when cooking in the oven,
The feature is that it is made to stand still when the toaster is cooked.

In this case, the plane shape of the lower heater is preferably semicircular. Further, it is preferable that the rotation driving device also serves as a device that rotates the turntable during microwave cooking. Further, the lower heater may be installed in the heating chamber.

[0008]

According to the above-mentioned means, the central heating can be performed by keeping the lower heater stationary during the toaster cooking, and the uniform heating can be performed by rotating the lower heater during the oven cooking. In that case, if the lower heater has a semi-circular planar shape, a shape suitable for the rotation of the heater,
A sufficient heating area can be obtained.

On the other hand, in the case where the rotary driving device is also used for rotating the turntable during microwave cooking, it may be unnecessary to provide a separate rotary driving device for each. If the lower heater is installed in the heating chamber, the food can be heated more strongly.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. First, FIGS. 1 and 2 show a cabinet 1 for the entire microwave oven with an oven / toaster function, which has a heating chamber 2 inside and a door for opening and closing an opening on the front surface of the heating chamber 2 in the front part. Have three.

In the heating chamber 2, upper heaters 4 and 5 are arranged inside the upper part, and a lower heater 6 is arranged outside the lower part. Of these, the upper heaters 4 and 5 are made of, for example, glass tube heaters, and two heaters are arranged side by side in the front and back, and a reflector 7 is provided on the upper back of each heater. On the other hand, the lower heater 6 is composed of, for example, a mica heater, and its planar shape is semicircular as shown in FIG.

Further, as shown in FIG. 2, the heating chamber 2 is provided with shelf supports 8 at upper and lower intermediate portions on both left and right sides, and a rotation driving device 9 is provided at a lower central portion. The rotation drive device 9 is configured by housing a motor 10 shown in FIG. 5 and a transmission mechanism (also not shown) for decelerating and transmitting the rotational power of the motor 10 to a drive shaft 11 shown in FIG. 4 in a case 12. The case 12 is installed outside the heating chamber 2, and the drive shaft 11 is projected into the heating chamber 2. Then, this rotation drive device 9
The lower heater 6 is attached to the drive shaft 11 outside the heating chamber 2, and a rotating disk (not shown) is attached and rotated inside the heating chamber 2 during microwave cooking.

Further, a detection switch 13 is disposed outside the heating chamber 2, and the drive shaft 11 of the rotary drive device 9 is provided with the lower heater 6 at a toaster function position, which will be described later. The convex portion 14 is provided as a switch operating portion for activating. In addition, the lower heater 6
Power is supplied from the substrate 15 outside the heating chamber 2 through the brush 16 and the lead wire 17 disposed in the drive shaft 11.

On the other hand, in the power supply 18 shown in FIG. 5, the rotary drive unit 9 is connected through a fuse 19 and three door switches 20, 21, 22 which respond to opening and closing of the door 3.
Series connection circuit of the motor 10 and the first relay switch 23, series connection circuit of the upper (front) heater 4 and the second relay switch 24, another upper (rear) heater 5 and the third relay switch 25, a series connection circuit of the lower heater 6 and the fourth relay switch 26, and a magnetron drive circuit 28 for driving a magnetron 27 that generates a microwave to be supplied into the heating chamber 2 and a fifth circuit. A series connection circuit with the relay switch 29 is connected.

Further, a control device 31 is connected to the power source 18 via a transformer 30. The control device 31 is composed of a microcomputer, and an operation signal is input from an operation unit 32 including various operation switches, and a detection signal is input from the detection switch 13. Based on a control program stored in advance, the first to fifth relay switches 23 to 26, 29 are opened and closed as described below.

Therefore, based on the above configuration, the operation unit 3 is now available.
When the toaster cooking is selected and instructed to be executed by 2, the control device 31 causes the second relay switch 24 and the fourth relay switch 24 to operate.
And the upper (front) heater 4 and the lower heater 6 are energized to generate heat. in this case,
The motor 10 of the rotary drive device 9 is not energized, and therefore the lower heater 6 is not rotated but is made to stand still at the front position (toaster function position) below the upper heater 4 shown in FIG. Therefore, at the position below the upper heater 4, the shelf support 8
By arranging a grill 33 between them and placing a food (bread) 34 on it, the food 34 can be heated by the upper heater 4 and the lower heater 6, and the lower heater 6 is a conventional lower heater. Since the size is less than half and the power density can be increased, the temperature rise of the lower portion of the portion where the food 34 of the heating chamber 2 is located can be swiftly performed, and desired toaster cooking can be performed in a short time without spending time as in the past. it can.

On the other hand, when the oven cooking is selected and the execution is instructed by the operation unit 32, the control device 31 is executed.
Closes the second and third relay switches 24 and 25 and the fourth relay switch 26 to energize the upper (front) heater 4, the upper (rear) heater 5 and the lower heater 6 to generate heat. . At the same time, the first relay switch 23 is closed to energize and rotate the motor 10 of the rotary drive device 9, thereby rotating the lower heater 6. Therefore, in this case, as shown in FIGS. 6 and 7, the rectangular top plate 35 is provided between the shelf supports 8 at a position below both upper heaters 4 and 5.
The food 36 can be heated by the upper heaters 4, 5 and the lower heater 6 by erection of the food and the food 36 placed on it. The food 36 can be heated uniformly because it repeatedly extends to the position. Therefore, it is not necessary to use a circular top plate having a small area, and a square top plate 35 having a large area can be used as desired to cook many foods at a time.

At the end of the oven cooking, the control device 31 turns off the motor 10 of the rotary drive device 9 when the detection switch 13 detects that the lower heater 6 has reached the toaster function position. , The lower heater 6 is stopped.

Further, when oven cooking is selected by the operation unit 32 and execution is instructed, the control device 31
The fifth relay switch 29 is closed to energize the magnetron drive circuit 28 to operate the magnetron 27. At the same time, the first relay switch 23 is closed, and the motor 10 of the rotary drive device 9 is energized and rotated to rotate a turntable (not shown). Therefore,
In this case, by placing the food on the turntable, the food can be cooked by the microwave supplied from the magnetron 27 into the heating chamber 2.

At the end of the microwave cooking,
When it is detected by the detection switch 13 that the lower heater 6 rotated together with the turntable (not shown) has reached the toaster function position, the control device 31 turns off the motor 10 of the rotation drive device 9 to turn off the turntable and the turntable. The lower heater 6 is stopped.

As described above, according to this structure, the central heater can be centrally heated by keeping the lower heater 6 stationary during the toaster cooking, whereby the toaster cooking time can be shortened as desired, while the lower heater is heated during the oven cooking. It can be heated uniformly by rotating 6
As a result, a large number of foods can be cooked in the oven at one time by using the square top plate 35 having a large area as desired.

Further, particularly in the case of the above-mentioned structure, the lower heater 6 has a semicircular planar shape, which makes it possible to obtain a sufficient heating area with a shape suitable for rotation, so that the oven cooking is further improved. You can do it well.

Further, the rotary driving device 9 is also used for rotating the lower heater 6 and also for rotating the rotary disk during microwave cooking, whereby it is not necessary to provide a separate rotary driving device for each. It can be applied, and it is possible to prevent the overall size and cost from rising.

In contrast to the above, FIGS. 8 and 9 show different embodiments of the present invention in which the lower heater 6 is installed in the heating chamber 2, and by doing so, the food Can be heated more strongly.

[0025]

The microwave oven with oven / toaster function of the present invention is as described above, and has the following effects. First, in a heater provided with an upper portion and a lower portion of a heating chamber to which microwaves are supplied, the lower heater is attached to a rotation driving device so that it is rotated during oven cooking and is stationary during toaster cooking. As a result, the time required for toaster cooking can be shortened, and the amount of food that can be cooked at one time can be increased during oven cooking.

Secondly, by making the plane shape of the lower heater semi-circular, it is possible to obtain a sufficient heating area with a shape suitable for the rotation of the heater, and it is possible to perform oven cooking more satisfactorily. .

Thirdly, since the rotary driving device is also used for rotating the turntable during microwave cooking, it is possible to eliminate the need for providing separate rotary driving devices, thereby making the whole large-sized. It is possible to suppress increase in cost and cost. Fourthly, by installing the lower heater in the heating chamber, the food can be heated more strongly.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing an embodiment of the present invention.

[Fig. 2] Front view in vertical section

FIG. 3 is a cross-sectional plan view.

FIG. 4 is an enlarged vertical sectional front view of a rotary drive unit.

[Fig. 5] Electric circuit diagram

FIG. 6 is a view corresponding to FIG. 1 in a different cooking state.

FIG. 7 is a view corresponding to FIG.

FIG. 8 is a view corresponding to FIG. 1 showing a different embodiment of the present invention.

FIG. 9 is a view corresponding to FIG.

[Explanation of symbols]

2 is a heating chamber, 4 and 5 are upper heaters, 6 is a lower heater, 9
Is a rotary drive device, 11 is a drive shaft, 23 to 26 are first to fourth relay switches, 27 is a magnetron, 28 is a magnetron drive circuit, 29 is a fifth relay switch,
Reference numeral 31 represents a control device.

Claims (4)

[Claims] 1. A heater is provided at an upper portion and a lower portion of a heating chamber to which microwaves are supplied, and the lower heater is attached to a rotary driving device so that the heater is rotated during oven cooking and is stationary during toaster cooking. A microwave oven with a characteristic toaster and toaster function. 2. A microwave oven with an oven / toaster function according to claim 1, wherein the lower heater has a semicircular plan shape. 3. The microwave oven with an oven / toaster function according to claim 1, wherein the rotation drive device is also used as a device for rotating a turntable during microwave cooking. 4. The microwave oven with an oven / toaster function according to claim 1, wherein a lower heater is installed in the heating chamber.