JPH11190523A - Microwave oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To heat an article to be cooked uniformly and efficiently. SOLUTION: After a cooking room 2 is irradiated with microwave under a state where a rotary net 9 is stopped, the rotary net 9 turns by 180 deg. and then the cooking room 2 is irradiated with microwave under a state where the rotary net 9 is stopped. Since a specific part of an article to be cooked does not face an exciting port constantly even if the article is mounted on a part of the rotary net 9 where the microwave concentrates, the article is heated efficiently. Furthermore, since the rotary net 9 has a point symmetric mesh, the mesh is substantially invariant even when the net turns by 180 and a constant microwave distribution is kept in the cooking room. According to the arrangement, uneven heating of the article due to deformation of the mesh can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven having a rotating body on which food is set.

[0002]

In the case of a microwave oven, the microwave distribution in the cooking chamber becomes non-uniform due to the position of an excitation port for irradiating the microwave into the cooking chamber, the standing wave in the cooking chamber, and the like. For this reason, by continuously rotating the disk-shaped rotating body, the distribution of standing waves in the cooking chamber is disturbed (the stephan effect), and the entire surface of the rotating body is uniformly irradiated with microwaves.
The uneven heating of the food on the rotating body was reduced.

[0003] However, the diameter of the rotating body is larger than that of the cooked food (specifically, about 270 mm to 330 mm). In particular, when the amount of cooked food is small, it is difficult to uniformly irradiate the entire surface of the rotating body with microwaves. ineffective. Therefore, it has been considered to set the food in a portion of the rotating body where the microwaves are concentrated, and to heat the food in a stopped state of the rotating body. However, in the case of this configuration, the microwave tends to concentrate on a specific portion on the excitation port side of the cooked food, and there is a possibility that uneven heating may occur.

[0004] The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a microwave oven capable of heating cooked foods uniformly and efficiently.

[0005]

According to a first aspect of the present invention, there is provided a microwave oven, comprising: a cooking chamber having an excitation port on an inner wall; a rotating body provided in the cooking chamber, on which cooking objects are set; A magnetron for irradiating microwaves through an excitation port, a motor for rotating and driving the rotating body, and control means for controlling the driving of the magnetron and the motor, wherein the rotating body is “360 ° / N (N is 2 or more) In the rotation state, the rotation means is provided in a rotationally symmetric shape having substantially the same shape as before rotation, and the control means irradiates the cooking chamber with microwaves in a stopped state of the rotating body; It is characterized in that the operation of rotating the cooking chamber in an integer multiple of substantially “360 ° / N” and the operation of irradiating the cooking chamber with microwaves while the rotating body is stopped are sequentially performed.

According to the above-mentioned means, the operation of irradiating the microwave into the cooking chamber with the rotating body stopped, and the rotating body being substantially "3"
The operation of rotating the cooking chamber in an integer multiple of 60 ° / N ”and the operation of irradiating the microwave into the cooking chamber in a stopped state of the rotating body are sequentially performed, so that a specific portion of the food is strongly opposed to the excitation port. Heating is prevented. In addition, even if the rotating body is rotated by an integral multiple of "360 ° / N", the shape of the rotating body does not substantially change before and after the rotation, and the microwave distribution in the cooking chamber is affected by the shape change of the rotating body. As a result, the cooking is generally evenly and efficiently heated.

According to a second aspect of the present invention, the microwave oven includes an angle detecting means for detecting a rotation angle of the rotating body, wherein the control means stops the rotating body at a reference position based on a detection result of the angle detecting means; Move the body approximately 360 ° /
The operation is performed in such a manner that the rotation is performed in units of an integral multiple of N ”. According to the above-described means, the microwave distribution in the cooking chamber can be changed to a form suitable for the cooking object by stopping the rotating body at the reference position corresponding to the cooking object. In addition, the rotating body is shifted from the above-described reference position by “360”.
° / N ”, so that a specific portion of the food is not heated strongly against the excitation port, and the microwave distribution in the cooking chamber is kept constant before and after rotation. The food is evenly and efficiently heated with the optimal microwave distribution.

The microwave oven according to claim 3 is characterized in that the angle detecting means outputs an electric signal every time the rotating body rotates in integral multiples of "360 ° / N".
According to the above means, the amount of rotation of the rotator can be reduced when stopping the rotator at the reference position, so that the time required for positioning the rotator is reduced.

According to a fourth aspect of the present invention, in the microwave oven, the rotating body has three conductive portions extending in a radial direction at substantially equal pitches.
It has a rotationally symmetric shape, and is characterized in that an opening having a maximum dimension of “１ ／” or more of the microwave wavelength is formed between the conductive portions adjacent in the circumferential direction. According to the above-described means, the three conductive portions of the rotating body are inclined with respect to the microwave distribution along the left-right direction and the front-back direction in the cooking chamber, and the ratio of the microwave passing through the opening of the rotating body is increased. It changes according to the angle of. For this reason, a variety of microwave distributions can be obtained, and it is easy to form a desired microwave distribution according to the food.

According to a fifth aspect of the present invention, in the microwave oven, the rotating body has a plurality of conductive portions arranged substantially concentrically about the axis, and each conductive portion group extends in the radial direction. Are formed at a 120 ° rotational symmetry having substantially the same pitch. According to the above-described means, the microwave distribution in the cooking chamber changes greatly according to the angle of the rotating body. For this reason, the variety of the microwave distribution is abundant, and it is easier to form the microwave distribution according to the food.

According to a sixth aspect of the present invention, in the microwave oven, a cooking chamber having an excitation port on an inner wall, a rotating body provided in the cooking chamber and on which cooking material is set, and microwaves are irradiated into the cooking chamber through the excitation port. A rotating magnet, a motor for rotating the rotating body, and control means for controlling the driving of the magnetron and the motor, wherein the rotating body has a mesh shape substantially point-symmetric with respect to the axis of the rotating body. An operation in which the excitation port is disposed at a portion eccentric with respect to an axis of the rotating body, wherein the control means irradiates the microwave to the cooking chamber when the rotating body is stopped; It is characterized in that an operation of rotating by an integral multiple of ° and an operation of irradiating the cooking chamber with microwaves in a stopped state of the rotating body are sequentially performed.

According to the above-mentioned means, the operation of irradiating the microwave to the cooking chamber with the rotating body stopped is performed,
Since the operation of rotating by an integral multiple of 0 ° and the operation of irradiating the microwave into the cooking chamber in a stopped state of the rotating body are sequentially performed, a specific portion of the food is heated strongly against the excitation port. Is prevented. Moreover, the rotating body is approximately 180
Even if rotated by an integer multiple of °, the mesh shape of the rotating body does not change before and after rotation, so that the microwave distribution in the cooking chamber is kept substantially constant before and after rotation, and in general, the food is heated uniformly and efficiently Is done.

The microwave oven according to the present invention is characterized in that the control means rotates the rotating body based on the lapse of approximately half the set cooking time. According to the above-described means, the rotating body rotates after the cooking time has substantially elapsed by half, so that the cooked food can be uniformly and efficiently heated by a simple control of driving the rotating body only once.

[0014] In the microwave oven according to the present invention, a cooking chamber having an excitation port on an inner wall, a rotating body provided in the cooking chamber and on which cooking material is set, and microwaves are irradiated into the cooking chamber through the excitation port. A magnetron, a motor that rotationally drives the rotating body, and a control unit that drives and controls the magnetron and the motor, wherein the rotating body is substantially bilaterally symmetric with respect to a center line passing through the axis of the rotating body. An operation of irradiating the cooking chamber with microwaves in a state in which the excitation port is disposed at a portion eccentric with respect to the axis of the rotating body, and has a substantially symmetric mesh shape; And an operation of rotating the rotating body by an integral multiple of about 90 ° and an operation of irradiating the cooking chamber with microwaves in a stopped state of the rotating body.

According to the above means, the operation of irradiating the microwave to the cooking chamber with the rotating body stopped is performed,
Since the operation of rotating in integer multiples of ° and the operation of irradiating the microwave into the cooking chamber with the rotating body stopped are sequentially performed, a specific portion of the food is strongly heated facing the excitation port. Is prevented. In addition, the mesh shape of the rotating body does not change before and after rotation, and the microwave distribution in the cooking chamber is kept substantially constant before and after rotation, so that the cooked food is generally uniformly and efficiently heated.

The microwave oven according to the ninth aspect is characterized in that the excitation port is provided on the side wall of the cooking chamber. According to the above-described means, when the rotating body is stopped, the specific portion of the food that faces the excitation port is particularly strongly heated. However, since the rotating body rotates, uneven heating occurs in the food due to the influence of the excitation port. Is prevented.

According to a tenth aspect of the present invention, the microwave oven includes gas detecting means for detecting an amount of gas generated from the cooked food, and the control means controls the rotating body based on an output signal from the gas detecting means reaching a reference value. The feature is that it is rotated. According to the above means, when the amount of gas generated from the food reaches the reference value, the rotating body rotates. For this reason, even when the cooking time is not set in advance, the rotating body can be rotated so that each part of the food is opposed to the excitation port for substantially the same time, so that uneven heating is reduced.

According to the eleventh aspect of the present invention, there is provided a microwave oven, further comprising a temperature detecting means for detecting a temperature of the food, wherein the control means rotates the rotating body based on an output signal from the temperature detecting means reaching a reference value. It has features. According to the above means, when the temperature of the food reaches the reference value, the rotating body rotates. For this reason, even when the cooking time is not set in advance, the rotating body can be rotated so that each part of the food is opposed to the excitation port for substantially the same time,
Heat unevenness is reduced.

A microwave oven according to a twelfth aspect is characterized in that the control means changes the reference value according to the food. According to the above means, even when the cooking time differs depending on the food, the rotating body can be rotated so that each part of the food faces the excitation port for substantially the same time, so that uneven heating is reduced. You.

A microwave oven according to a thirteenth aspect is characterized in that the control means rotates the rotating body every time a predetermined time elapses. According to the above means, even when the cooking time is changed during cooking, the rotating body rotates every time the predetermined time elapses, so that the microwaves are relatively uniformly applied to each part of the cooked food, and uneven heating is caused. Reduced.

The microwave oven according to the present invention is characterized in that the microwave oven is provided with an instruction means for instructing to set the food at the center of the rotating body. According to the above means, if the food is set at the center of the rotating body in accordance with the instruction, the positional relationship between the excitation port and the food becomes substantially equal regardless of the rotation angle of the rotating body. For this reason, the positional relationship between the excitation port and the cooked food changes depending on the rotation angle of the rotating body, thereby preventing uneven heating of the cooked food.

A microwave oven according to a fifteenth aspect is characterized in that an excitation port is provided at the center in the front-rear direction on the side wall of the cooking chamber and above the rotating body. According to the above means, the microwave concentration region is formed in the center of the rotating body in front of the excitation port. Since the center of the rotating body is a part where the user unconsciously sets the food, the food can be set in the microwave concentration area without paying much attention.

According to a sixteenth aspect of the present invention, the control means selects between a case where the rotating body is rotated in the mode described in any one of the first, fourth and sixth aspects and a case where the rotating body is continuously rotated according to the food. However, it has features. According to the above means, for example, when the food is flat, the microwave can be irradiated while the rotating body is continuously rotated. For this reason, since the microwave is uniformly irradiated to the whole food, uneven heating is reduced.

A microwave oven according to claim 17 is characterized in that the control means repeats the stop, rotation and stop of the rotating body a plurality of times within the cooking time. According to the above means, it is possible to give the user an impression that the rotating body is rotating intermittently, so that it is possible to prevent a sense of incongruity such as a failure that the rotating body does not rotate.

According to the eighteenth aspect, the control means is characterized in that the control means stops the rotating body for a predetermined period of time. According to the above-described means, the time at which each part of the cooking object faces the excitation port can be reliably fixed, so that
A specific portion of the food is intensively heated for a long period of time, so that uneven heating of the food is reliably prevented.

[0026]

FIG. 1 shows a first embodiment of the present invention.
A description will be given with reference to FIG. First, in FIG. 1A, the cabinet 1 includes an inner box 1b inside an outer box 1a.
The cooking chamber 2 is formed inside the inner box 1b. A door 3 is rotatably mounted on the cabinet 1, and a front opening of the cooking chamber 2 is
The door 3 is opened and closed with the turning operation of the door 3.

As shown in FIG. 1B, a machine room 4 is formed in the cabinet 1 on the right side of the cooking chamber 2, and a waveguide 5 is formed in the machine room 4. And a magnetron 6 are provided. In addition, as shown in FIG. 1A, an excitation port 7 is provided at a central portion in the front-rear direction on the right side wall of the cooking chamber 2, and the excitation port 7 is provided in FIG. As shown in FIG. The excitation port 7 is located at the bottom of the cooking chamber 2. When the magnetron 6 is operated, microwaves are emitted from the waveguide 5 through the excitation port 7 into the cooking chamber 2.

As shown in FIG. 2, an RT motor 8 is provided in the cabinet 1 below the cooking chamber 2. The RT motor 8 is a synchronous motor, and the rotating shaft 8a of the RT motor 8 protrudes from the bottom in the cooking chamber 2, and the tip of the rotating shaft 8a has an insertion portion 8b having a rectangular cross section. Is formed.

A rotating net 9 corresponding to a rotating body is mounted on the rotating shaft 8a of the RT motor 8. This rotating net 9
As shown in FIG. 1A, the cylinder is disposed below the excitation port 7 and is detachably fitted to the outer surface of the insertion portion 8b of the RT motor 8 as shown in FIG. Part 9a, a circular frame part 9b, and a net part 9c located in the frame part 9b
As shown in FIG. 3, the mesh portion 9c has a lattice shape point-symmetric with respect to the axis of the frame portion 9b (= the cylindrical portion 9a).

On the net portion 9c of the rotating net 9, FIG.
As shown in FIG. 1, a concentric cooking dish 10 is placed.
The cooking dish 10 is made of a microwave transmitting material such as glass or ceramic, and an illustration (not shown) for instructing to put the food on the center of the cooking dish 10 is printed on the cooking dish 10. Have been.

The central portion of the cooking dish 10 is a portion facing the excitation port 7, and the microwaves are intensively irradiated. For this reason, if the food is placed on the center of the cooking dish 10 according to the illustration, the microwave is intensively irradiated on the food, and the food is efficiently heated. In addition, the illustration of the cooking dish 10
It corresponds to an instruction means for instructing to set a food item in the center of the rotating net 9.

On the left side wall of the cooking chamber 2, a gas sensor 11 corresponding to gas detection means is mounted. The gas sensor 11 detects an amount of gas (amount of water vapor) released from the cooked food, and outputs an electric signal corresponding to the detected amount of gas. A control circuit board (not shown) is provided in the machine room 4, and a control device 12 is provided on the control circuit board.
(See FIG. 5). This control device 12
It corresponds to control means for controlling the driving of the magnetron 6 and the RT motor 8, and is mainly composed of a microcomputer.

As shown in FIG. 1A, an operation panel 13 is provided in the cabinet 1 in front of the machine room 4, and a front surface of the operation panel 13 is shown in FIG. Thus, the automatic cooking key 14a, the time dial 14b, the start key 14c, and the liquid crystal display device 14d are mounted. The automatic cooking key 14a is for selecting automatic cooking such as steamed chicken, cooked rice, shomai, boiled fish, liquor warming, and raw thawing. The control device 12 operates the automatic cooking key 14a. If so, cooking completion is determined based on an output signal from the gas sensor 11. The time dial 14b is for setting a cooking time, and the control device 12 operates when the time dial 14b is operated.
The cooking is ended when the time set by the time dial 14b has elapsed.

As shown in FIG. 2, a circular cam plate 15 is connected to the rotating shaft 8b of the RT motor 8, and a cam projection 15a is attached to the outer peripheral surface of the cam plate 15. The limit switch 1 is located on the side of the cam plate 15.
In the initial state, the plunger of the limit switch 16 is pressed by the cam projection 15a, and the limit switch 16 is turned on. Reference numeral 17 in FIG. 2 indicates an angle detecting means constituted by the cam plate 15 and the limit switch 16.

Next, the operation of the above configuration will be described.
The following operation is executed by the control device 12 based on a control program stored in the internal ROM in advance. <Manual Cooking> Upon detecting the turning operation of the time dial 14b, the control device 12 sets the cooking time T according to the operation amount of the time dial 14b. Start key 1 in this state
When the operation of 4c is detected, the power is supplied to the magnetron 6, and the microwave is irradiated from the waveguide 5 into the cooking chamber 2 through the excitation port 7. At the same time, the remaining cooking time is displayed on the display device 14d, and the display of the remaining cooking time is reduced as the cooking progresses.

A drive circuit board (not shown) is provided in the machine room 4. As shown in FIG. 5, a magnetron drive circuit 6a is mounted on the drive circuit board. The driving of the magnetron 6 is controlled via the magnetron driving circuit 6a.

The relationship between the driving time of the RT motor 8 and the amount of rotation of the rotating net 9 is stored in the internal ROM of the control device 12, and the control device 12 operates as shown in FIG.
When it is detected that the time (T−t) / 2 has elapsed from the start of cooking, power is supplied to the RT motor 8 for a time t based on the data stored in the internal ROM, and the rotation shaft 8 of the RT motor 8 is rotated.
The rotating net 9 is rotated 180 ° integrally with b. Note that t
Is the time required for the rotating net 9 to rotate 180 °.

When the set time T has elapsed, the controller 12 cuts off the power of the magnetron 6 and ends the cooking. After the power is supplied to the RT motor 8 and the rotating net 9 is rotated, the plunger of the limit switch 16 is moved to the cam plate 15.
Of the limit switch 1
When it is detected that the motor 6 has been turned on, the RT motor 8 is turned off, and the rotating net 9 is returned to the initial state.

<Automatic Cooking by Gas Sensor> Controller 1
The internal ROM 2 stores a gas amount reference value corresponding to a cooked food such as warming sake or shoumai. When the control device 12 detects an operation of the automatic cooking key 14a, the control device 12 displays the selected cooked food. The corresponding gas amount reference value and cooking program are read from the internal ROM and written into the internal RAM.

For example, when non-planar cooking such as warming of liquor is selected, when detecting the operation of the start key 14c, the control device 12 supplies power to the magnetron 6 based on the cooking program, and performs cooking. The chamber 2 is irradiated with microwaves.

When the control device 12 starts microwave irradiation, it detects an output signal from the gas sensor 11 and compares the output signal with a gas amount reference value in the internal RAM. And
As shown in FIG. 4B, when it is detected that the output signal from the gas sensor 11 has risen to the gas amount reference value, R
Power is supplied to the T motor 8 for a time t, and the cooking dish 10 is rotated by 180 ° together with the rotating net 9.

When the controller 12 detects that the rate of change of the output signal from the gas sensor 11 has reached the cooking end value, the controller 12 cuts off the power of the magnetron 6 and ends the cooking. Then, the RT motor 8 is driven until the limit switch 16 is turned on, and the rotating net 9 is returned to the initial state. Note that the gas amount reference value is set in advance so that the rotating net 9 is rotated when the cooking time T has elapsed about half.

When flat cooking such as shoumai is selected, the control device 12 operates the start key 14c.
When the operation is detected, power is supplied to the magnetron 6 and the RT motor 8 based on the cooking program,
At the same time, the microwave is irradiated into the cooking chamber 2 while rotating the cooking dish 10 continuously. Then, when it is detected that the rate of change of the output signal from the gas sensor 11 has reached the cooking end value, the magnetron 6 is turned off to end the cooking. At the same time, the RT motor 8 is driven until the limit switch 16 is turned on, and the rotating net 9 is returned to the initial state.
The cooking end value is stored in advance in the internal ROM of the control device 12.

According to the above embodiment, the microwave is applied to the cooking chamber 2 in a state where the rotation of the rotating net 9 is stopped.
Was rotated by 180 °, and microwaves were irradiated into the cooking chamber 2 while the rotation of the rotating net 9 was stopped. For this reason, even if the food is placed on the microwave concentrated portion (central portion) of the rotating net 9, a specific portion of the food is not heated strongly against the excitation port 7, so that the food is not heated. Heated evenly and efficiently.

By the way, as shown in FIG. 3, the length La of the mesh of the rotating net 9 along the longitudinal direction is set to “λ / 2” or more, through which microwaves can easily pass, and the length along the transverse direction is set. The length Lb is set to less than “λ / 4” where microwaves do not easily pass. For this reason, when the microwave reflected upward from the bottom of the cooking chamber 2 passes through the mesh, the amount of microwave passing changes according to the rotation angle of the mesh. Moreover, the wall current flowing through the rotating net 9 is a long vertical rod 9.
Since the flow is rectified in the extending direction of d, the microwave distribution in the cooking chamber 2 can be changed by the rotation angle of the rotating net 9.

On the other hand, in the above embodiment, the mesh of the rotating net 9 is point-symmetric. Therefore, the rotation net is 180 °
Even if it rotates, the mesh shape does not substantially change from before rotation, and the microwave distribution in the cooking chamber 2 is kept constant, so that uneven heating of the food due to the mesh shape is prevented.

Further, since the excitation port 7 is disposed on the right side wall of the cooking chamber 2, when the rotation of the rotating net 9 is stopped, the portion of the food which faces the excitation port 7 is particularly strongly heated. However, with the rotation of the rotating net 9, another part of the food is
In addition, since the mesh shape of the rotating net 9 is point symmetrical, uneven heating of the food occurs due to the influence of the excitation port 7;
It is possible to prevent uneven cooking from occurring due to the influence of the change in the mesh shape.

At the time of manual cooking, the rotating net 9 is set to 180
° rotated. Therefore, the simple control of driving the rotating net 9 only once makes the time facing the excitation port 7 of each portion of the cooked food uniform, thereby reducing uneven heating. In addition, unlike the case where the rotating net 9 is rotated 180 ° at high frequency, the microwave in the cooking chamber 2 is stirred by the rotation of the rotating net 9 and the microwave distribution is prevented from being changed. Also from this point, uneven heating is reduced.

During automatic cooking, the rotating net 9 was rotated 180 ° based on the fact that the amount of gas generated from the food reached the gas amount reference value. For this reason, even if the cooking time T is not set in advance, the rotating net 9 can be rotated at an appropriate timing after the cooking time has elapsed by about half so that the times of the portions of the food that face the excitation port 7 are substantially equalized. Can be rotated, so that uneven heating is reduced.

At the time of automatic cooking, the gas amount reference value was changed according to the food. For this reason, even though the cooking time varies depending on the food, the rotating net 9 can be rotated at an appropriate timing when the cooking time has elapsed by about half, so that uneven heating is reduced regardless of the type of the food. Is done.

Further, an illustration was printed on the cooking dish 10, and an instruction was given to set the food in the center of the cooking dish 10. Therefore, if the food is set in the center of the cooking dish 10 in accordance with the instruction, the food is not affected by the rotation of the rotating net 9, and the positional relationship between the excitation port 7 and the cooking is determined by the rotation angle of the rotating net 9. Therefore, the heating unevenness is reduced from this point as well.

Further, since the excitation port 7 is disposed at the center of the cooking chamber 2 in the front-rear direction and above the rotating net 9, a microwave concentration area is formed at the center of the cooking dish 10 in front of the excitation port 7. You. For this reason, if the food is set in the center of the cooking dish 10, the microwaves are intensively irradiated on the food from the excitation port 7 regardless of the rotation angle of the rotating net 9, so that the food is efficiently and uniformly distributed. Heated. In addition, since the central portion of the rotating net 9 is a portion where the user unconsciously sets the food, there is an advantage that the food can be set in the microwave concentration area without paying much attention.

Further, when a flat food such as a shoe mai is selected, the RT motor 8 is driven from the start to the end of the cooking, and the microwave is irradiated into the cooking chamber 2 while rotating the rotating net 9. . For this reason, the microwave is stirred by the rotation of the rotating net 9, and the microwave is uniformly applied to the whole food, so that uneven heating is reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS.
It will be described based on. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. First, in FIG. 6, an infrared sensor 18 is mounted on the ceiling wall of the cooking chamber 2. The infrared sensor 18 corresponds to a temperature detecting means for detecting the surface temperature of the food, and outputs an electric signal corresponding to the surface temperature of the food.

The internal ROM of the control device 12 stores a temperature reference value corresponding to a cooked product such as warming sake or shumai. When the operation of the automatic cooking key 14a is detected, the control device 12 selects the temperature. The temperature reference value and the cooking program corresponding to the cooked food are read from the internal ROM, and the internal R
Write to AM. For example, when the non-planar cooking is selected, when the operation of the start key 14c is detected, the power is supplied to the magnetron 6 based on the cooking program, and the microwave is radiated into the cooking chamber 2.

When the control device 12 starts microwave irradiation, it detects an output signal from the infrared sensor 18 and compares the output signal with a temperature reference value in the internal RAM. And
As shown in FIG. 7, when detecting that the output signal from the infrared sensor 18 has risen to the temperature reference value, the power is supplied to the RT motor 8 for a time t, and the cooking dish 1 and the rotating net 9 are supplied.
0 is rotated 180 °. Note that the temperature reference value is set in advance so that the rotating net 9 is rotated when the cooking time T has elapsed about half.

When the controller 12 detects that the output signal from the infrared sensor 18 has reached the cooking end value, the controller 12 cuts off the power of the magnetron 6 and ends the cooking. Then, the RT motor 8 is driven until the limit switch 16 is turned on, and the rotating net 9 is returned to the initial state. The cooking end value is stored in advance in the internal ROM of the control device 12.

When flat cooking is selected, the controller 12 supplies power to the magnetron 6 and the RT motor 8 based on the cooking program and detects the operation of the start key 14c, At the same time, the microwave is irradiated into the cooking chamber 2 while rotating the cooking dish 10 continuously. When it is detected that the output signal from the infrared sensor 18 has reached the cooking end value, the magnetron 6 is turned off to end the cooking. At the same time, the RT motor 8 is driven until the limit switch 16 is turned on, and the rotating net 9 is returned to the initial state.

According to the above embodiment, during automatic cooking, the rotating net 9 was rotated by 180 ° based on the fact that the temperature of the food reached the temperature reference value. For this reason, even if the cooking time T is not set in advance, the rotating net 9 can be rotated at an appropriate timing after the cooking time has elapsed by about half so that the times of the portions of the food that face the excitation port 7 are substantially equalized. Can be rotated, so that uneven heating is reduced.

In the first and second embodiments, when the cooking time T elapses approximately half, the rotating net 9 is set at 18 degrees.
Although rotated by 0 °, the present invention is not limited to this. For example, the rotating net 9 may be rotated by 180 ° every time the cooking time T elapses approximately 1/4, approximately 1/6.

Next, a third embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. The operation panel 13 is provided with an increase key and a decrease key (both not shown). When the control device 12 detects an operation of the increase key during manual cooking, the control device 12 performs cooking according to the number of times of operation of the increase key. When the time T is added and the operation of the reduction key is detected, the cooking time T is subtracted according to the number of times the reduction key is operated.

In the case of the above configuration, when manual cooking is started, the control device 12 supplies power to the magnetron 6 and irradiates the cooking chamber 2 with microwaves. Then, the predetermined time Ta
Every time elapses, power is supplied to the RT motor 8 for the time t, and the rotating net 9 is rotated by 180 °.

According to the above embodiment, the rotating net 9 is rotated every time the predetermined time Ta elapses. For this reason, even if the cooking time is changed during cooking, the microwaves are relatively uniformly applied to each part of the food, so that uneven heating is reduced. Further, the stop, rotation, and stop of the rotating net 9 were repeated a plurality of times within the cooking time T. For this reason, the impression that the rotating net 9 is intermittently rotating can be given to the user, and it is possible to prevent the user from feeling uncomfortable, such as a failure in which the rotating net 9 does not rotate. Further, the rotating net 9 was stopped for a predetermined time Ta. For this reason, the time when each part of the food is opposed to the excitation port 7 is reliably fixed, so that the specific part of the food is intensively heated for a long time, and the generation of uneven heating in the food is reliably prevented. Is done.

In the first to third embodiments, the rotating net 9 is rotated by 180 °. However, the present invention is not limited to this. What is necessary is just to rotate about 180 degrees so that it may oppose only for time. In the first to third embodiments, the rotating net 9 is rotated by 180 °. However, the present invention is not limited to this. For example, the rotating net 9 may be rotated by “180 × (2n + 1)” °. It may be 180 ° units. Here, n is a natural number.

Next, a fourth embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. The mesh shape of the net portion 9c of the rotating net 9 is formed symmetrically with respect to a center line A1 passing through the axis and symmetrically with respect to the center line A2.

In this configuration, when the control device 12 detects the turning operation of the time dial 14b and the operation of the start key 14c, the control device 12 sets the cooking time T in accordance with the operation amount of the time dial 14b, and then sets the cooking time T to the magnetron 6. Power is supplied to irradiate microwaves into the cooking chamber 2. Then, every time the time T1, T2, T3 elapses from the start of cooking, the RT motor 8 is driven by the time "t / 2", and the rotating net 9 is rotated by 90 [deg.]. The details of the times T1 to T3 are as follows. T1 = (T-3t / 2) / 4 T2 = 2 (T-3t / 2) / 4 + t / 2 T3 = 3 (T-3t / 2) / 4 + t

When the control device 12 detects the operation of the automatic cooking key 14a and the operation of the start key 14c, it reads out the gas amount reference and the cooking program corresponding to the food from the internal ROM and writes it into the internal RAM. The gas amount reference is made up of a first gas amount reference value, a second gas amount reference value, and a third gas amount reference value. The control device 12 outputs an output signal from the gas sensor 11 to the first gas amount reference value. Each time the gas amount reference value, the second gas amount reference value, and the third gas amount reference value are reached, R
The T motor 8 is driven for the time “t / 2”, and the cooking time is T
The rotating net 9 is rotated by 90 ° at the timing of reaching 1 to T3.

According to the above embodiment, after the microwave is applied to the cooking chamber 2 with the rotating net 9 stopped, the rotating net 9 is
After rotating by 0 °, the microwave was irradiated into the cooking chamber 2 with the rotating net 9 stopped. For this reason, even if the food is placed on the microwave concentrated portion (central portion) of the rotating net 9, a specific portion of the food is not heated strongly against the excitation port 7, so that the food is not heated. Heated evenly and efficiently. At the same time, the rotation amount of the rotating net 9 is as small as 90 °, and the degree of contact of the microwave with the food is made uniform, so that the heating unevenness is reduced from this point as well. Moreover, the mesh shape of the rotating net 9 is formed symmetrically in the left-right direction and in the front-back direction. For this reason,
Even if the rotating net rotates by 90 °, the mesh shape does not substantially change before and after the rotation, and the microwave distribution in the cooking chamber 2 is kept constant. Is prevented.

In the first to fourth embodiments, the rotating net 9 is rotated from the initial position. However, the present invention is not limited to this, and the initial position of the rotating net 9 may not be set. . In the case of this configuration, the cam plate 15, the cam protrusion 15a, and the limit switch 16 are eliminated, so that
The configuration is simplified. Further, in the first to fourth embodiments, the excitation port 7 is provided on the right side wall of the cooking chamber 2.
The present invention is not limited to this, and may be provided, for example, on the left side wall of the cooking chamber 2. In short, it may be provided at a portion eccentric with respect to the rotation axis of the rotating net 9.

Next, a fifth embodiment of the present invention will be described with reference to FIGS. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. First, FIG.
, The rotating plate 19 is formed by pressing a conductive material such as a steel plate into a disk shape, and the rotating plate 19 is formed with three fan-shaped openings 19a arranged in the circumferential direction. The maximum dimension L of each opening 19a is set to “１ ／” or more of the microwave wavelength λ oscillated from the magnetron 6. Note that the rotating plate 19 corresponds to a rotating body, and the cooking dish 10 is placed on the upper surface of the rotating plate 19.

The three openings 19a are arranged at an equal pitch of 120 °, and the rotating plate 19 has a disk-shaped base 19b, an annular frame 19c, and four stays 1a.
9d. These four stay portions 19d correspond to conductive portions, are arranged at an equal pitch of 120 °, and each stay portion 19d has a straight shape extending in the radial direction. As shown in FIG. 11, a cylindrical boss 19e is fixed to the lower surface of the rotating plate 19 at the center. The boss portion 19e has a rectangular cross section, and is detachably fitted to the outer surface of the insertion portion 8b of the rotating shaft 8a of the RT motor 8.

The cam plate 15 of the RT motor 8 is disposed outside the cooking chamber 2. One pin 20 a and two pins 20 b are fixed on the upper surface of the cam plate 15, and one pin The rotation shaft 8 of the RT motor 8 is
They are arranged 180 ° opposite to each other with respect to a. Further, a transmission-type optical sensor 20c is fixed to the bottom of the cabinet 1. The optical sensor 20c has a U-shaped holder with a light projecting element and a light receiving element mounted on both ends of the holder. When the cam plate 15 rotates, a single pin moves between the light projecting element and the light receiving element. 20a and two pins 20b pass through. Reference numeral 20 denotes an angle detecting means composed of one pin 20a, two pins 20b, and an optical sensor 20c.

When the control device 12 detects the turning operation of the time dial 14b and the operation of the start key 14c,
After setting the cooking time T according to the operation amount of the time dial 14b, the power is supplied to the RT motor 8 and the rotating plate 19 and the cam plate 15 are rotated. At this time, when one pin 20a passes between the light projecting element and the light receiving element of the optical sensor 20c, the light projected from the light projecting element is blocked by the single pin 20a, and there is no light incident on the light receiving element. , A first reference position signal is output from the light receiving element. Further, when the two pins 20b pass between the light emitting element and the light receiving element, the light projected from the light emitting element
Since the light is intermittently blocked by b and the light incident on the light receiving element is intermittently eliminated, the light receiving element outputs a second reference position signal different from the first reference position signal.

The control device 12 receives the first signal from the optical sensor 20c.
When the output of the reference position signal or the second reference position signal is detected, the RT motor 8 is turned off and the rotating plate 1 is turned off.
9 is stopped. Then, power is supplied to the magnetron 6 to irradiate the cooking chamber 2 with microwaves. Thereafter, every time the times T1 and T2 elapse from the start of the cooking, the RT motor 8 is driven for the time "2t / 3", and the rotating plate 18 is moved for 120 hours.
Rotate by °. The details of the time T1 to T2 are as follows. T1 = {T-2 (2t / 3)} / 3 T2 = 2 {T-2 (2t / 3) / 3} + 2t / 3

When the control device 12 detects that the start key 14c has been operated after the operation of the automatic cooking key 14a, the rotating plate 19 according to the selected contents of the automatic cooking key 14a.
, The first gas amount reference value G1, the second gas amount reference value G2, and the cooking program.

When the rotation angle of the rotary plate 19 changes, the wall current is rectified in the direction in which the stay 19d extends, and the electric field distribution changes, and the transmission / reflection of microwaves changes depending on the direction of the opening 19a. A change occurs in the microwave distribution in the cooking chamber 2. The above-mentioned stop angle θ ° is obtained by experimentally obtaining the stop angle of the rotating plate 19 for obtaining the optimum microwave distribution according to the food such as “warm rice” and “sakekan” for each food. , The advance angle of the rotary plate 19 from the first reference position where one pin 20a passes through the optical sensor 20c and the first reference position signal is output, and the optical sensor 2
The rotation angle is defined by two types of advance angles of the rotary plate 19 from the second reference position at which the two pins 20b pass through 0c and the second reference position signal is output.

After reading out the stop angle θ ° corresponding to the food, the control device 12 turns off the RT motor 8 after a lapse of time “t × θ ° / 180 °” from the output of the first reference position signal. Is set, and the stop angle θ is compared with 60 °. Here, when “θ <60 °” is detected, the time “t (θ + 60) ° / 180” is output from the output of the second reference position signal.
Another off timing of the RT motor 8 after a lapse of “°” is set.

When the controller 12 detects "θ≥60 °", the controller 12 outputs the time "t (θ-6)" from the output of the second reference position signal.
0) The other off timing of the RT motor 8 after the lapse of “° / 180 °” is set. In the case of the rotating plate 19, three stay portions 19d are arranged in a 120 ° rotationally symmetrical shape arranged at an equal pitch, and when the RT motor 8 is turned off at a set timing, the rotating plate 19 has the same stay shape before and after rotation. And stop.

After setting the off-timing of the RT motor 8, the control device 12 supplies power to the RT motor 8 to rotate the rotary plate 19 and the cam plate 15. At this time, when it is detected that the first reference position signal is output from the optical sensor 20c, the RT motor 8 is turned off at the set timing starting from the first reference position signal, and the rotating plate 19 is turned at the set angle θ. Stop. Further, when detecting that the second reference position signal is output from the optical sensor 20c, the RT motor 8 is turned off at the set timing starting from the second reference position signal, and the rotating plate 19 is stopped at the set angle θ. Let it.

When the rotating plate 19 is stopped, the control device 12 supplies power to the magnetron 6 and irradiates the cooking chamber 2 with microwaves. Thereafter, each time the output signal from the gas sensor 11 reaches the first gas amount reference value G1 and the second gas amount reference value G2, the RT motor 8 is driven by the time "2t / 3", and the cooking time is set as described above. The rotating plate 19 is rotated by 120 ° at the timing of reaching T1 to T2.

According to the above-described embodiment, since the rotating plate 19 is positioned at the reference position, the microwave distribution in the cooking chamber 2 becomes a form suitable for the food. In addition, the 120 ° rotationally symmetric rotating plate 19 was rotated by 120 ° from the reference position. For this reason, a specific portion of the food is not heated strongly against the excitation port 7 and the microwave distribution in the cooking chamber 2 is kept constant before and after the rotation, so that the optimum microwave is obtained. It is evenly and efficiently heated by the wave distribution.

Further, since the shape of the cooking chamber 2 is substantially cubic, the microwave distribution in the cooking chamber 2 tends to be symmetrical in the left-right and front-back directions. Therefore, when the rotation net 9 of FIG. 3 having a 180 ° rotation symmetry or the rotation net 9 of FIG. 9 having a 90 ° rotation symmetry is used, the mesh shape of the rotation net 9 follows the microwave distribution in the cooking chamber 2. Would.

On the other hand, in the above embodiment, the rotating plate 19
In this example, three stay portions 19d extending in the radial direction were provided at an equal pitch, and the rotating plate 19 was formed in a 120 ° rotationally symmetric shape. For this reason, a variety of microwave distributions can be obtained according to the rotational position of the rotating body 19, so that it is easy to form a desired microwave distribution according to the food. In addition, since the shape of the rotating plate 19 is simplified and the rotating plate 19 can be manufactured by press-forming the conductive plate, the workability of manufacturing the rotating plate 19 is improved.

Further, in detecting the angle of the rotating body 19, since the optical sensor 20c which is not affected by the microwave is used, the detection accuracy of the pins 20a and 20b is improved, and the rotating plate 19 is further moved at the stop position θ. It will surely stop.

The cam plate 15 and one pin 20a, 2
The pin 20 b and the optical sensor 20 c are arranged outside the cooking chamber 2. For this reason, since each member is less likely to be affected by heat from the inside of the cooking chamber 2, the structure of each member against heat can be simplified.

Further, the angle detection means 20 generates different first reference position signals and second reference position signals, and the RT motor 8 starts from one of the first reference position signals and the second reference position signals. Off timing was set. For this reason, one reference position signal is generated by the angle detection means 20,
The time from the start of rotation of the RT motor 8 to the output of the reference position signal and the time from the output of the reference position signal to the turning off of the RT motor 8 are different from the case where the off timing of the RT motor 8 is set starting from one reference position signal. Time is reduced.

Next, a sixth embodiment of the present invention will be described with reference to FIG. The same members as those in the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. A cam 21 is fixed to the cam plate 15. The cam 21 has one cam projection 21a at one end and two cam projections 21b at the other end. One cam projection 21a and two cam projections 21b are RT motors. 180 with the rotating shaft 8a of
° Opposed.

A micro switch 22 is fixed to the bottom of the cabinet 1, and the cam 21 rotates integrally with the cam plate 15, and the plunger 22 of the micro switch 22
When a is pressed by one cam projection 21a, an ON signal is output from the microswitch 22 once. Also,
When the plunger 22a of the micro switch 22 is continuously pressed by the two cam projections 21b, an ON signal is continuously output twice from the micro switch 22. still,
Reference numeral 23 denotes an angle detecting means constituted by the cam 21 and the micro switch 22.

In the case of the above configuration, the control device 12 processes a single ON signal from the microswitch 22 as a first reference position signal, and processes a continuous ON signal as a second reference position signal. The rotating plate 19 is stopped at an angle θ according to the food. In this case, the angle detecting means 23 is
1 and the micro switch 22, the thermal strength of the angle detecting means 23 is increased.

Next, a seventh embodiment of the present invention will be described with reference to FIG. The same members as those in the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. The cam plate 15 has three pins 2
4 are fixed at an equal pitch of 120 °, and the optical sensor 2
When each pin 24 passes between the light emitting element and the light receiving element of 0c, the light projected from the light emitting element is blocked by each pin 24, and the light receiving element outputs a reference position signal. still,
Reference numeral 25 indicates an angle detecting means composed of three pins 24 and an optical sensor 20c.

When the control device 12 detects that the start key 14c has been operated after the operation of the automatic cooking key 14a, the control device 12 reads out the stop angle θ of the rotating plate 19 and the like according to the contents of the automatic cooking and the time from the output of the reference position signal. “T × θ ° / 180
The off-timing of the RT motor 8 after a lapse of “°” is set.

When the control device 12 sets the off-timing of the RT motor 8, it supplies power to the RT motor 8 to rotate the rotary plate 19 and the cam plate 15. At this time, when it is detected that the reference position signal is output from the optical sensor 20c, the setting time “t × θ ° / 1”
80 ° ”, the RT motor 8 is turned off,
The rotating plate 19 is stopped at an angle θ according to the food. After irradiating the microwave into the cooking chamber 2, the RT motor 8 is turned on for a time "2t /" every time the output signal from the gas sensor 11 reaches the first gas amount reference value G1 and the second gas amount reference value G2. 3 "to rotate the rotating plate 19 by 120 °.

According to the above embodiment, the rotating plate 19 is
Since the reference position signal is output from the optical sensor 20c every time the motor rotates by 0 °, the time from the start of the rotation of the RT motor 8 to the output of the reference position signal and the time from the output of the reference position signal to the turning off of the RT motor 8 are reduced. It is further shortened.

In the seventh embodiment, the cam plate 1
5, three pins 24 are fixed, and each pin 24 is
Although the reference position signal is generated based on the detection by 0c, the present invention is not limited to this. For example, as shown in FIG.
The permanent magnets 26 may be fixed at an equal pitch of 120 °, and a magnetic sensor 27 such as a Hall element may be provided on the outer periphery of the cam plate 15. In this case, each permanent magnet 26 is
7, the magnetic sensor 27 is turned on, and the magnetic sensor 27 outputs a reference position signal. Here, code 2
Reference numeral 8 denotes an angle detecting means composed of three permanent magnets 26 and a magnetic sensor 27.

Next, a ninth embodiment of the present invention will be described with reference to FIG. The same members as those in the fifth embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. Base 19a of rotating plate 19
Are formed with three fan-shaped openings 19f arranged in the circumferential direction. These three openings 19f are 120 °
The three short stays 19g, which are arranged at an equal pitch of 120 °, are connected to the rotating plate 1 at the same pitch.
9.

Each stay portion 19g corresponds to a conductive portion, has a short straight shape extending in the radial direction of the rotary plate 19, and is located at a circumferentially intermediate portion between two long stay portions 19d. ing. Reference numeral 29 denotes a first conductive portion group composed of three short stay portions 19 g located on the inner peripheral portion of the rotating plate 19, and reference numeral 30 denotes a long conductive member located on the outer peripheral portion of the rotating plate 19. FIG. 9 shows a second conductive portion group constituted by book stay portions 19d. The first conductive portion group 29 and the second conductive portion group 30 include a boss portion 19e of the rotating plate 19 (the rotating plate 19).
Are arranged concentrically around the center of the
It has a 120 ° rotationally symmetrical shape whose shape does not change even when rotated by 20 °.

According to the above embodiment, the first conductive part group 29 and the second conductive part group 30 are provided on the rotating plate 19. For this reason, the microwave distribution in the cooking chamber 2 changes more greatly according to the stop position of the rotating plate 19, and a more varied microwave distribution can be obtained. Easy to form.

In the fifth to ninth embodiments, the increase key and the decrease key are provided, and when the increase key or the decrease key is operated during the manual cooking, after the increase key or the decrease key is operated. Each time the fixed time Ta elapses, the rotating plate 19
Is preferably rotated by 120 °. Further, in the fifth to ninth embodiments, the rotating plate 19 is rotated by 120 ° at a time. However, the present invention is not limited to this.
It may be rotated 80 ° at a time.
(Integer multiple of the unit).

Further, in the fifth to ninth embodiments, the rotating plate 19 is set at one position with respect to the stop position θ corresponding to the food.
Although the rotation is performed by 20 °, the rotation is not limited to this. For example, the rotation may be performed by 120 ° from the initial state without setting the stop position θ according to the food. Also in this case, the time when each part of the food is opposed to the excitation port 7 is equalized, and the microwave distribution in the cooking chamber 2 is constant before and after the rotation of the rotating plate 19, so that the food is evenly distributed. Heated efficiently.

Next, a tenth embodiment of the present invention will be described with reference to FIG. The same members as those in the fourth embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. The rotating plate 31 is formed by pressing a conductive material such as a steel plate into a disk shape.
1, four fan-shaped openings 31a are formed side by side in the circumferential direction. The rotating plate 31 corresponds to a rotating body, and the cooking dish 10 is placed on the upper surface of the rotating plate 31.

The four openings 31a are arranged at an equal pitch of 90 °, and the rotating plate 31 has a disk-shaped base 31b, an annular frame 31c, and four stays 31a.
d. These four stay portions 31d correspond to conductive portions, are arranged at an equal pitch of 90 °, and each stay portion 31d has a straight shape extending in the radial direction. On the lower surface of the rotating plate 31, a cylindrical boss portion 31e is fixed at a central portion. This boss part 31e
Has a rectangular cross section and is detachably fitted to the outer surface of the insertion portion 8b of the rotating shaft 8a of the RT motor 8.

When detecting the operation of the start key 14c, the controller 12 supplies power to the magnetron 6. Then, regardless of the case where the cooking time T is set manually and the case where the automatic cooking is set, the power is supplied to the RT motor 8 every time the predetermined time Ta (for example, 10 seconds) elapses for the time “t / 2”. And the rotating plate 31 is intermittently rotated by 90 ° until cooking is completed.

According to the above embodiment, the rotating plate 31 is set at 90 °
When the rotating plate 31 is stopped, the cooking chamber 2 is formed in a rotationally symmetric shape.
Operation of irradiating microwaves into the inside and rotating plate 31 at 90 °
Since the operation of rotating and the operation of irradiating the microwave into the cooking chamber 2 while the rotating plate 31 is stopped are sequentially performed, the food is uniformly and efficiently heated.

In the fourth and tenth embodiments, the rotating net 9 and the rotating plate 31 are rotated at a constant angle of 90 °. However, the present invention is not limited to this. Or 180 °, 9
It may be rotated irregularly at 0 ° and 180 °.
What is necessary is just to rotate by 0 degree (integer multiple of 90 degree) unit.

Next, an eleventh embodiment of the present invention will be described with reference to FIG. The same members as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted. Hereinafter, only different members will be described. The rotating plate 32 is formed by pressing a conductive material such as a steel plate into a disk shape.
2, five fan-shaped openings 32a are formed side by side in the circumferential direction. The rotating plate 32 corresponds to a rotating body, and the cooking dish 10 is placed on the upper surface of the rotating plate 32.

The five openings 32a are arranged at an equal pitch of 72 °, and the rotating plate 32 has a disk-shaped base portion 32b, an annular frame portion 32c, and five stay portions 32c.
d. These five stay portions 32d correspond to conductive portions, are arranged at an equal pitch of 72 °, and each stay portion 32d has a straight shape extending in the radial direction. On the lower surface of the rotating plate 32, a cylindrical boss portion 32e is fixed at a central portion. This boss 32e
Has a rectangular cross section and is detachably fitted to the outer surface of the insertion portion 8b of the rotating shaft 8a of the RT motor 8.

Upon detecting the operation of the start key 14c, the control device 12 supplies power to the magnetron 6. Then, regardless of the case where the cooking time T is set manually and the case where the automatic cooking is set, the power is supplied to the RT motor 8 every time the predetermined time Ta (for example, 10 seconds) elapses for the time “72t / 180”. And the rotating plate 31 is rotated by 72 ° until cooking is completed.

According to the above embodiment, the rotating plate 32 is set at 72 °
When the rotating plate 32 is stopped, the cooking chamber 2 is formed in a rotationally symmetric shape.
The operation of irradiating microwave into the inside and rotating plate 32 at 72 °
Since the rotating operation and the operation of irradiating the microwave into the cooking chamber 2 with the rotating plate 32 stopped are sequentially performed, the cooked food is uniformly and efficiently heated.

In the fourth to eleventh embodiments, the end of the automatic cooking is determined based on the output signal from the gas sensor 11, but the present invention is not limited to this.
For example, as in the second embodiment, the end of the automatic cooking may be determined based on the output signal from the infrared sensor 18.

In the fourth and tenth embodiments, the rotating net 9 and the rotating plate 31 are rotated by 90 °, and in the fifth to ninth embodiments, the rotating plate 19 is rotated.
Is rotated by 120 °, and in the eleventh embodiment, the rotating plate 32 is rotated by 72 °. However, the present invention is not limited to this. Approximately 120 degrees, approximately 120
It may be rotated by 72 ° at a time.

In the first to eleventh embodiments, the rotation amounts of the rotating net 9, the rotating plate 19, the rotating plate 31, and the rotating plate 32 are controlled based on the driving time of the RT motor 8. The present invention is not limited to this. For example, even if the RT motor 8 is composed of a servomotor, and the amount of rotation of the rotating net 9, the rotating plate 19, the rotating plate 31, and the rotating plate 32 is controlled based on the output signal from the encoder. good.

In the first to eleventh embodiments, the weight sensor for detecting the weight of the food placed on the rotating plate 10 is provided, and the cooking is performed before cooking based on the output signal from the weight sensor. The time T may be set automatically.

In the first to eleventh embodiments, the rotating net 9, the rotating plate 19, the rotating plate 31, and the rotating plate 32 are rotated while the magnetron 6 is driven. However, the present invention is not limited to this. No, for example, the rotating net 9 and the rotating plate 1
9. When the rotating plates 31 and 32 rotate, the magnetron 6
May be stopped.

In the first to eleventh embodiments, the instruction to place the food on the center of the cooking dish 10 is given. However, the present invention is not limited to this. Although it may be instructed to place the food at an eccentric position with respect to the part, it is preferable that the portion where the food is placed is a concentrated portion of the microwave.

In the first to eleventh embodiments, the present invention is applied to a microwave oven dedicated to microwave cooking. However, the present invention is not limited to this. For example, the present invention is applied to a microwave oven having a heater cooking function. May be applied.

[0116]

As is apparent from the above description, the microwave oven of the present invention has the following effects. According to the first aspect of the present invention, the operation of irradiating the microwave into the cooking chamber when the rotating body is stopped, the operation of rotating the rotating body by an integral multiple of substantially “360 ° / N”, Since the operation of irradiating the microwave into the cooking chamber in the stopped state is sequentially performed, the cooked food is uniformly and efficiently heated. According to the second aspect of the present invention, the rotating body is rotated from the reference position by an integral multiple of substantially "360 ° / N", so that the food is uniformly and efficiently heated with the optimum microwave distribution. .

According to the third aspect of the present invention, an electric signal is output each time the rotating body rotates in an integral multiple of "360 ° / N", which is necessary for positioning the rotating body at the reference position. Time is reduced. According to the means described in claim 4, the rotating body is provided with an opening of "1/2" or more of the microwave wavelength and the conductive portion is extended in the radial direction, so that a variety of microwave distributions can be obtained. It is easy to form a desired microwave distribution according to the food.

According to the fifth aspect of the present invention, since a plurality of groups of conductive parts are provided on the rotating body, the variety of microwave distribution is further abundant, and the microwave distribution according to the food can be more easily formed. Become. According to the measure of claim 6,
After irradiating the microwave into the cooking chamber with the rotating body stopped, the rotating body was rotated by an integral multiple of approximately 180 °, and the microwave was irradiated into the cooking chamber with the rotating body stopped.
The food is evenly and efficiently heated.

According to the seventh aspect of the present invention, the rotating body is rotated based on the fact that the cooking time elapses approximately half, so that it is possible to cope with the simple control of driving the rotating body only once. According to the means of claim 8, after irradiating the microwave into the cooking chamber with the rotating body stopped, the rotating body is rotated by approximately 90 °.
, And the microwaves are radiated into the cooking chamber with the rotating body stopped, so that the cooked food is uniformly and efficiently heated.

According to the ninth aspect of the present invention, the excitation port is provided on the side wall of the cooking chamber. However, since the rotating body is intermittently rotated, uneven heating may occur in the cooked food due to the influence of the excitation port. Is prevented. According to the means of claim 10, since the rotating body is rotated based on the amount of gas generated from the food reaching the reference value, even when the cooking time is not set in advance, each part of the food can be used. Heated uniformly.

According to the eleventh aspect, since the rotating body is rotated based on the fact that the temperature of the food reaches the reference value, even if the cooking time is not set in advance, each part of the food can be rotated. Heated uniformly. According to the twelfth aspect of the present invention, since the gas amount reference value or the temperature reference value is changed according to the food, even if the cooking time differs depending on the food, each part of the food is uniformly heated. .

According to the thirteenth aspect, the rotating net is rotated every time the predetermined time elapses, so that even when the cooking time is changed during cooking, each part of the food is heated uniformly. . According to the means of claim 14, since the instruction to set the food in the center of the rotating net is given, uneven heating of the food is reduced without being affected by the rotation of the rotating body.

According to the means of the present invention, the excitation port is provided at the center of the side wall of the cooking chamber in the front-rear direction and above the rotating net, so that the rotating body of the rotating body can be used without the user's great care. Food can be set in the microwave concentration area. According to the means of the present invention, when the food is flat, the microwave is irradiated into the cooking chamber while rotating the rotating body, so that even if the food is flat, uneven heating is reduced. Is done.

According to the means of the seventeenth aspect, the stop, rotation and stop of the rotating body are repeated a plurality of times within the cooking time.
It is possible to prevent the user from feeling uncomfortable such as a failure that the rotating body does not rotate. According to the means of claim 18, since the rotating body is stopped for a predetermined period of time, the time at which each part of the cooking object faces the excitation port is reliably fixed,
The occurrence of uneven heating in the cooked food is reliably prevented.

[Brief description of the drawings]

FIG. 1 is a view showing a first embodiment of the present invention (a is an external view schematically showing an entire configuration, and b is a vertical sectional front view showing the inside of a machine room).

FIG. 2 is a perspective view showing an attached state of a rotating net to an RT motor.

FIG. 3 is a top view showing a rotating net.

FIG. 4 is a diagram showing the relationship between the cooking time and the rotating state of the rotating net (a is for manual cooking, and b is for automatic cooking).

FIG. 5 is a block diagram schematically showing an electrical configuration.

FIG. 6 is a view showing a second embodiment of the present invention (an external view schematically showing the entire configuration).

FIG. 7 is a diagram corresponding to FIG.

FIG. 8 is a view corresponding to FIG. 4A showing a third embodiment of the present invention.

FIG. 9 is a view corresponding to FIG. 3, showing a fourth embodiment of the present invention;

FIG. 10 is a view corresponding to FIG. 3, showing a fifth embodiment of the present invention;

FIG. 11 is a diagram corresponding to FIG. 2;

FIG. 12 is a view corresponding to FIG. 2, showing a sixth embodiment of the present invention;

FIG. 13 is a view corresponding to FIG. 2, showing a seventh embodiment of the present invention.

FIG. 14 is a view corresponding to FIG. 2, showing an eighth embodiment of the present invention.

FIG. 15 is a view corresponding to FIG. 3, showing a ninth embodiment of the present invention;

FIG. 16 is a view corresponding to FIG. 3, showing a tenth embodiment of the present invention.

FIG. 17 is a view corresponding to FIG. 3, showing an eleventh embodiment of the present invention;

[Explanation of symbols]

2 is a cooking room, 6 is a magnetron, 7 is an excitation hole, 8 is RT
Motor (motor), 9 is a rotating net (rotating body), 11 is a gas sensor (gas detecting means), 12 is a control device (control means), 17 is an angle detecting means, 18 is an infrared sensor (temperature detecting means), 19 is Rotating plate (rotating body), 19a is an opening, 19d is a stay portion (conductive portion), 19g is a stay portion (conductive portion), 20 is angle detecting means, 23 is angle detecting means, 25 is angle detecting means, 28 is Angle detecting means, 29 is a group of conductive parts, 30 is a group of conductive parts, 31 is a rotating plate (rotating body),
31d is a stay (conductive part), 32 is a rotating plate (rotary body), and 32d is a stave (conductive part).

Continued on the front page (51) Int.Cl. ⁶ Identification code FI H05B 6/78 H05B 6/78 A

Claims (18)

[Claims] A cooking chamber having an excitation port on an inner wall; a rotating body provided in the cooking chamber, on which a food is set; a magnetron for irradiating microwaves into the cooking chamber through the excitation port; A motor for rotating and driving a rotating body; and control means for controlling the driving of the magnetron and the motor, wherein the rotating body is “360 ° / N (N is an integer of 2 or more)”.
The rotating means is provided in a rotationally symmetric shape having substantially the same shape as before rotation, and the control means performs an operation of irradiating the cooking chamber with microwaves in a stopped state of the rotating body, and the rotating body being substantially "36".
A microwave oven characterized by sequentially performing an operation of rotating by an integral multiple of 0 ° / N ”and an operation of irradiating the cooking chamber with microwaves when the rotating body is stopped. 2. An angle detecting means for detecting a rotation angle of the rotating body, wherein the control means stops the rotating body at a reference position based on a detection result of the angle detecting means, and moves the rotating body from the reference position substantially. 2. The microwave oven according to claim 1, wherein the microwave oven is rotated in an integral multiple of "360 ° / N". 3. The angle detecting means according to claim 1, wherein said rotating body is substantially "360 °".
3. The microwave oven according to claim 2, wherein an electric signal is output each time the motor rotates in integral multiples of "/ N". 4. The rotating body has a 120 ° rotationally symmetrical shape having three conductive portions extending in a radial direction at substantially equal pitches, and a maximum dimension between the conductive portions adjacent in the circumferential direction is a microwave wavelength. 4. The microwave oven according to claim 1, wherein an opening of "1/2" or more is formed. 5. The rotating body has a plurality of conductive portions arranged substantially concentrically about an axis, and each conductive portion group includes three conductive portions extending in a radial direction at substantially equal pitches. 4. The microwave oven according to claim 1, wherein the microwave oven has a 120 ° rotational symmetry. 6. A cooking chamber having an excitation port on an inner wall, a rotator provided in the cooking chamber and on which cooking material is set, a magnetron for irradiating microwaves into the cooking chamber through the excitation port, A motor for rotationally driving a body, and control means for controlling the drive of the magnetron and the motor, wherein the rotator has a mesh shape substantially point-symmetric with respect to an axis of the rotator, and the excitation port is The control unit is configured to irradiate microwaves into the cooking chamber when the rotating body is stopped, and to control the rotating body by approximately 180 degrees.
A microwave oven characterized by sequentially performing an operation of rotating in units of an integral multiple of ° and an operation of irradiating the cooking chamber with microwaves when the rotating body is stopped. 7. The microwave oven according to claim 6, wherein the control means rotates the rotating body based on a lapse of approximately half the set cooking time. 8. A cooking chamber having an excitation port on an inner wall, a rotator provided in the cooking chamber and set with a food, a magnetron for irradiating microwaves into the cooking chamber through the excitation port, A motor that rotationally drives a body; and a control unit that drives and controls the magnetron and the motor; wherein the rotator has a mesh that is substantially bilaterally symmetric and substantially symmetrical with respect to a center line passing through an axis of the rotator. Wherein the excitation port is disposed at a portion that is eccentric with respect to the axis of the rotating body, wherein the control means irradiates the cooking chamber with microwaves in a stopped state of the rotating body; Rotating body approximately 90 °
2. A microwave oven, comprising: sequentially performing an operation of rotating the cooking chamber in an integer multiple of the following and an operation of irradiating the cooking chamber with microwaves when the rotating body is stopped. 9. The microwave oven according to claim 1, wherein the excitation port is provided on a side wall of the cooking chamber. 10. A gas detection device for detecting an amount of gas generated from a cooking product, wherein the control device rotates the rotating body based on an output signal from the gas detection device reaching a reference value. The microwave oven according to any one of claims 1, 6, and 8, wherein 11. The apparatus according to claim 1, further comprising a temperature detector for detecting a temperature of the food, wherein the controller rotates the rotator based on an output signal from the temperature detector reaching a reference value. The microwave oven according to any one of 1, 6, and 8. 12. The microwave oven according to claim 10, wherein the control means changes the reference value according to the food. 13. The apparatus according to claim 1, wherein said control means rotates said rotating body every time a predetermined time elapses.
The microwave oven according to any one of the above. 14. The microwave oven according to claim 1, further comprising an instruction means for instructing to set a food at a central portion of the rotating body. 15. The apparatus according to claim 1, wherein the excitation port is provided at a central portion in the front-rear direction of the side wall of the cooking chamber and above the rotating body. microwave. 16. The control device according to claim 1, wherein the rotating body is a rotating body.
The microwave oven according to any one of claims 1, 6 and 8, wherein the case of rotating in the mode described in any one of (8) and the case of continuous rotation is selected according to the food. 17. The microwave oven according to claim 1, wherein the control unit repeats stopping, rotating, and stopping the rotating body a plurality of times within the cooking time. 18. The apparatus according to claim 1, wherein the control means stops the rotating body for a predetermined period of time.
The microwave oven according to any one of claims 6 and 8.