JP2721814B2 - microwave - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave oven, and more particularly to a microwave oven which can automatically execute grilling and combination cooking under the control of a microcomputer while vertically moving a turntable up and down. The present invention relates to a microwave oven obtained.

[0002]

2. Description of the Related Art FIGS. 12 (A) and 12 (B) are views showing the structure and operation of a conventional microwave oven turntable vertical moving device. FIG. 13 shows a conventional automatic thawing method using a weight sensor. FIG. FIG.
(A) and FIG. 14 (B) are drawings showing the configuration and operation of a conventional grill / combination cooking device.

As shown in FIGS. 12 (A) and 12 (B), a conventional turntable vertical moving device for a microwave oven has a heating chamber 1 at the center of a bottom surface 1a of a heating chamber 1 swelling downward. The rotary shaft 2 is fixed in the vertical direction toward the inside of the shaft. A dish-shaped support portion 3 having a cam curve formed on the upper edge and bulging downward is connected to the rotating shaft 2 and fixedly installed on the bottom surface of the heating chamber 1. A plus (+) The rotary part 4 and the turntable 6 are successively rotatably connected to the rotary shaft 2. And heating room 1
A motor 7 for rotating the turntable 6 is provided at a lower portion of the bottom surface of the.

[0004] At this time, since the plus rotary part 4 and the turntable 6 are integrally rotated by the rotation of the rotary shaft 2, the upper surface of the plus rotary part 4 and the lower face of the turntable 6 are vertically coupled. In addition, four wheels 5 are provided below the positive rotating portion 4 so as to be able to roll along a cam curve formed on the upper portion of the support portion 3.

When the motor 7 shown in FIG. 12B is driven, the drive amount of the conventional microwave oven turntable up-and-down moving device 101 having the above structure is transmitted to the plus-shaped rotating portion 4 through the rotating shaft 2. The positive rotation part 4 and the turntable 6 are rotationally driven. At this time, each wheel 5 provided at the lower portion of the plus-shaped rotating portion 4 rolls along a cam curve on the upper surface of the support portion 3 formed to enhance the effect of cooking, so that plus Turntable 6 mounted on the rotary part 4
Moves up and down along the cam curve.

Accordingly, the conventional turntable vertical moving device 101 is designed to move food and drink in a microscopic manner because the turntable 6 moves up and down along a cam curve formed on the upper surface of the support portion 3 when cooking food and drink. Get the waves evenly. On the other hand, the conventional automatic thawing method of a microwave oven has a turntable 6 in the structure of the microwave oven as described above.
A weight sensor (not shown) for detecting the weight of food and drink is provided below the weighing device, and the weight detected by the weight sensor is input to the microcomputer 8 so that the automatic thawing time and the high frequency generated from the magnetron are obtained. The output level is determined.

That is, when the user selects the type of defrosted food and activates the defrosting function, the weight of the food is sensed by the microcomputer 8 and the weight sensor. And
The weight detected by the microcomputer 8 is compared with various data for the weight: thawing time and the weight: high frequency output mode, which have been input into the microcomputer 8 in advance, and an appropriate thawing time and mode are determined. When the magnetron is driven according to the determined thawing time and the high-frequency output level, the high-frequency is output and the food is thawed.

Here, thawing chicken will be described as an example.
The weight detected by the microcomputer 8 is 80
In the case of 0 g, the thawing time by the microcomputer 8 is 60 minutes based on the data stored in advance, and the thawing mode is 20 minutes at a high frequency output level of 70% and 10 minutes at 20%.
In some cases, it is determined that the time is 10 minutes at 30% and 20 minutes at 10%.

On the other hand, in the conventional microwave oven, as shown in FIG. 14A, a heater 9 is installed in the upper part of the inside of the heating chamber 1 in order to cook grilled food. For this purpose, another shelf 10 crossing the upper part of the heating chamber 1 is detachably installed inside the heating chamber 1. In order to allow the user to cook the grill with such a structure, the shelf 1
After the food to be cooked is placed on the heater 9, the grill dish is activated and power is applied to the heater 9, whereby the heater 9 is turned on.
Heats the food and drink and performs grill cooking for the food and drink.

[0010] Then, in order to cook a combination dish, FIG.
As shown in (B), in addition to the heater 9 described above, a magnetron 11 is installed at a predetermined position on one side surface outside the heating chamber 1. When the user operates the combination dish with the shelf removed to operate the combination dish with such a structure, the magnetron is driven for a certain period of time to perform high-frequency heating, and thereafter the heater is driven for a certain period of time to grill. Cooking is performed.

[0011]

However, in the conventional turntable vertical moving device 101, when the turntable moves up and down along the cam curve, the turntable moves up and down according to the cam curve. When the thing is in a liquid state, there is a problem that overflow occurs or the user's anxiety about the overflow of the liquid food cannot be eliminated.

Further, the internal structure of the microwave oven is complicated by the installation of the supporting portion and the plus-shaped rotating portion, and the food is uniformly heated by the vertical movement of the turntable, but the microwave is applied to the bottom of the food. Since the structure cannot be reached, there is a problem that uniform heating of all parts cannot be guaranteed. And, as described above, in the conventional decompression method, the decompression does not proceed only in the limited decompression mode already determined,
In some cases, the appropriate thawing mode may not be input and thawing may not be performed properly.Therefore, it is troublesome to determine and store the total thawing time for the weight value in advance for each type of dish, and the weight of the food and There was a problem that a weight sensor for sensing should be provided.

[0013] In addition, the conventional grilled food as described above has the inconvenience of mounting a shelf for each dish when starting the grilled food, pulling out the shelf when the cooking is completed, and storing the shelf separately.
In particular, when handling a shelf that has become hot due to heating, it may be burned, and the food surface facing the heater has a browning effect (a phenomenon in which the food surface changes to a slightly yellow and delicious color). The portion in contact with the opposite shelf is difficult to obtain the browning effect, and in some cases, the user has to directly turn over the food or drink.

[0014] In addition, in the conventional combination cooking as described above, when cooking the grill with the heater and the high frequency heating with the magnetron in parallel, the food on the turntable moves up and down only a small width along the cam curve. Therefore, there is a problem that food and drink are not cooked uniformly and an excessive cooking is performed only in a specific portion. Therefore, an object of the present invention is to make the vertical movement of the turntable of the microwave oven to be performed naturally and smoothly, to minimize the swinging phenomenon of the turntable, to prevent the liquid food from overflowing, and to prevent the turntable from overflowing. The use of a turntable up / down movement device that eliminates the use of a support section or a rotation section for up / down movement of the heating chamber, extremely simplifies the configuration of the heating chamber, and ensures an environment where cooking is evenly performed to the bottom of food and drink. It is to provide a microwave oven.

Another object of the present invention is to eliminate the use of a weight sensor of a microwave oven, to sense the temperature and the amount of water discharged as the food and drink progress, and to use the temperature and water sensing information. The total thawing time and its mode are used to determine the thawing of the food and drink, and the thawing is performed by moving the turntable up and down by the turntable vertical moving device so that the food is thawed uniformly and sufficiently. It is to provide a microwave oven with an automatic thawing device and method.

Still another object of the present invention is to eliminate the use of shelves for grill cooking, and to use the turntable up and down moving device to bring food and drink close to the heater side when grilling food. When grilling food at a position and cooking a combination dish, all parts of food and drink are cooked evenly by moving the turntable up and down so that the combined cooking with microwaves and heaters proceeds. SUMMARY OF THE INVENTION It is an object of the present invention to provide a grill / combination type microwave oven which solves the inconvenience and safety problems caused by handling the shelves.

[0017]

In order to achieve the object of the present invention as described above, a microwave oven according to the present invention is provided with a screw-shaped gear on a turntable shaft, and using this gear and a motor. Vertically and stably drive the turntable up and down and rotate, and thaw using the temperature sensor and moisture sensor and chaos simulator to ensure the precision and high reliability of thawing control, and cook grills and combination dishes. Configured to obtain.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a microwave oven turntable vertical moving device, an automatic thawing device, and a grill / combination device of the present invention will be described. First, a turntable vertical moving device for a microwave oven according to the present invention will be described based on an embodiment. As shown in FIG. 1, a first embodiment of a microwave oven turntable vertical moving device according to the present invention is a turntable 21 which is installed inside a microwave oven and which gets on and off and rotates with food and drink placed thereon. A rotating shaft 22d is coupled to the lower center portion in the vertical direction downward.

A turntable lift gear 22 having a screw-shaped gear formed on the outer peripheral surface thereof is integrated with the rotary shaft 22d outside the rotary shaft 22d.
A turntable rotating gear 23 is penetrated and coupled to the rotating shaft 22d at the center of the lower part of 2d. The rotation shaft 22
On one side of d, a gear shaft 29 is provided parallel to the rotating shaft 22d at a predetermined distance from the rotating shaft 22d.

On the other hand, a motor 24 for providing power used for getting on and off and rotating the turntable 21 is connected to a microcomputer 30 for performing forward and reverse rotation control of the motor 24. Is connected to a motor gear shaft 25 for transmitting the power generated from the motor 24, and an intermediate gear 26 penetratingly connected to the gear shaft 29 on a side surface of the motor gear.
Are combined.

A turntable rotary drive gear 27 is penetrated and connected to a gear shaft 29 above the intermediate gear 26 and meshes with the turntable rotary gear 23. Is
A turntable lifting / lowering drive gear 28 having a screw-shaped gear formed on the outer peripheral surface is penetratingly coupled to the gear shaft 29 at a central portion thereof.
2a is engaged.

In the first embodiment of the microwave oven turntable vertical moving device 105 according to the present invention, the motor 24 serves as the power means 121, and the motor shaft gear 25, the intermediate gear 26, and the turntable rotation. The microcomputer 30 is used as the control means 123 with the drive gear 27, the turntable getting on / off drive gear 28, and the gear shaft 29 as power transmission means.

The turntable getting on / off gear 22
The upper and lower parts are provided with position sensing means 124 for sensing the upper limit position and the lower limit position when the turntable 21 moves up and down. As shown in FIGS. 1 and 2, the position sensing means 124 includes a lower idle gear 22b and an upper idle gear 22c formed at upper and lower portions of the turntable getting on / off gear 22.

That is, as described above, the center gear 22a of the turntable lifting gear 22 is coupled to the turntable lifting drive gear 28, and a part of the upper gear of the turntable lifting gear 22 is connected to the turntable lifting drive. The lower limit idle gear 22b configured to cut off the power transmission with the gear 28, and a part of the lower gear of the turntable elevating gear 22 as an upper limit configured to cut off the power transmission with the turntable elevating drive gear 28. Idle gear 2
2c.

The turntable getting on / off gear 22
And the turntable rotating gear 23, as shown in FIG.
The rotation axis of the turntable lifting gear 22 is circular, and is supported and rotatably coupled inside the turntable rotation gear 23. And the turntable rotating gear 23
As shown in FIG. 2, support grooves 22e are formed at regular intervals on the outer peripheral surface of the rotary shaft 22d located inside the rotary shaft 22d, and grooves 23a are formed on the inner surface of the rotary gear 23 opposed to the support grooves 22e.
Is formed.

A support projection 23c elastically supported by a spring 23b is provided in the groove 23a, and a tip of the support projection 23c is located in a support groove 22e formed on the rotary shaft 22d. As a result, the turntable elevating gear 22 rotates simultaneously with the driving of the turntable rotating gear 23 while the turntable elevating drive gear 2 rotates.
8 is a structure for getting on and off.

Hereinafter, the vertical movement operation of the turntable 21 according to the first embodiment of the microwave oven turntable vertical movement device 105 of the present invention will be described. When the motor 24 is driven in the forward or reverse direction under the control of the microcomputer 30 shown in FIG.
Motor shaft gear 25 connected to this motor 24
And the intermediate gear 26 are rotated together. Thus, when the intermediate gear 26 rotates, the turntable rotation drive gear 27 and the turntable getting on / off drive gear 28 are rotated.

Subsequently, the turntable rotation drive gear 27
, The turntable rotating gear 23 connected thereto is also rotated, and the turntable rotating gear 2 is rotated.
When the turntable 3 is rotated, the rotating shaft 22d connected to the inside of the turntable rotating gear 23 is rotated, and the turntable elevating gear 22 is also rotated. Thus, when the turntable getting on / off gear 22 is rotated, the turntable 21 connected to the upper end of the turntable getting on / off gear 22 is rotated.

As described above, the drive of the turntable lift drive gear 28 causes the turntable lift gear 22 to move.
The turntable elevating gear 22 gets on and off along the central gear portion 22a formed by the turntable 21, and the turntable 21 also gets on and off as the turntable elevating gear 22 gets on and off. That is, the turntable 21 is driven to rotate at the same time as getting on and off the vehicle. The reason why such rotation and getting on and off are performed simultaneously is as shown in FIG. 2 because the rotating shaft 22d is supported by a spring 23b. This is because the rotating shaft 22d is configured to be able to get on and off integrally with the turntable rotating gear 23 while being maintained in a state of being connected to the turntable rotating gear 23 by 23c.

The principle that the maximum height and the minimum height of the turntable 23 are regulated when getting on and off the vehicle is as follows. That is, the turntable getting on / off gear 22
Is raised to the maximum height, the upper-limit idle gear 22c meshes with the turntable getting on / off driving gear 28, so that even if power is transmitted from the turntable getting on / off driving gear 28 to the turntable getting on / off gear 22, the turntable getting on and off is further increased. The gear 22 is no longer raised.

Similarly, when the control of the rotation direction of the motor 24 is applied in the reverse direction, the turntable elevating gear 22 descends, and when the turntable elevating gear 22 descends to the minimum height, the lower limit idle gear 22b raises and lowers the turntable elevating gear. Since the drive gear 28 is meshed, even if power is transmitted from the turntable getting on / off driving gear 28 to the turntable getting on / off gear 22, the turntable getting on / off gear 22 is not further lowered.

As described above, in the first embodiment of the microwave oven turntable vertical moving device 105 according to the present invention, when the turntable 21 on which foods and drinks are put on and off gets on and off, the turntable 21 can be vertically moved without shaking. The food can be safely cooked in the liquid state because it is moved up and down in the direction, the internal configuration of the heating chamber of the microwave oven is simplified, and the food is raised high inside the heating chamber. The food is evenly cooked by ensuring the high frequency direct heating effect up to the bottom of the food.

On the other hand, FIG. 3 shows a second embodiment of the polyester turntable vertical moving device 106, and the same parts as those in the first embodiment (FIGS. 1 and 2) are denoted by the same reference numerals. Duplicate description will be omitted. In the second embodiment of the turntable vertical moving device 106 according to the present invention, a switch disk 31 for detecting the upper and lower limit positions of the turntable is coupled to the lower surface of the turntable lifting gear 22, and is integrated with the turntable lifting gear 22. Get on and off. The switch disk 31 is provided on the upper and lower portions of the switch disk 31.
An upper limit sensing switch 32 sensed by the switch disk 31 at a maximum rising height of 1 and a sensing switch 33 sensed by the switch disk 31 at a minimum falling height of the switch disk 31 are installed. The sensing signals of the sensing switch 32 and the lower sensing switch 33 are input to the microcomputer 30.

In the second embodiment of the turntable vertical moving device 106 constructed as described above, when the turntable elevating gear 22 is raised to the maximum height, the switch disk 31 is moved at this height to the upper limit detecting switch 32. When the getting on / off gear 22 is lowered to the minimum height, the switch disk 31 operates the lower limit detection switch 33 at this height. The microcomputer 30 senses that the switch is operated in this way, and when the turntable 21 is raised to the maximum upper limit height or the minimum lower limit height, the motor 24 is driven in the opposite direction.

On the other hand, FIG. 4 shows a third embodiment of the turntable vertical moving device 107 of the present invention, and the same parts as those in the first and second embodiments are denoted by the same reference numerals, and are duplicated. The explanation to be made is omitted. The third embodiment is characterized in that the power means is dualized and the power transmission means is also dualized so that the rotation and the getting on / off of the turntable 21 can be independently controlled.

That is, as shown in FIG. 4, the power means includes a turntable rotation motor 24a for providing power for rotating the turntable, and a turntable lift motor 2 for providing power for driving the turntable 21 up and down.
4b. The power transmission means is a motor shaft gear 25a of the turntable rotating motor 24a.
An intermediate gear 26a coupled to the motor shaft gear 25a to transmit power, a turntable rotation drive gear 27 driven on the same axis as the intermediate gear 26a and coupled to the turntable rotation gear 23, A rotational power transmission means 125 including a gear shaft 29a connecting the intermediate gear 26a and the rotational drive gear 27 on the same shaft;
A motor shaft gear 25b of the turntable lift motor 24b, an intermediate gear 26b coupled to the motor shaft gear 25b to transmit power, and driven on the same axis as the intermediate gear 26b, and coupled to the turntable lift gear 22; And a step-up / down drive means comprising a turntable drive-up / down drive gear 28. The turntable getting on / off motor 24b is a stepping motor for facilitating the control of the vertical position and the speed.

In the third embodiment of the turntable vertically moving device 107 constructed as described above, the turntable rotating motor 24a is controlled by the microcomputer 30.
Is driven, this turntable rotation motor 24
The rotation of the intermediate gear 26a is transmitted to the turntable rotation drive gear 27 via the gear shaft 29a, and the turntable rotation drive gear 27 is connected to the turntable rotation gear 23. Is rotated, and the turntable 21 is rotated together with the turntable lifting gear 22 according to the principle described in the first embodiment. On the other hand, when the turntable elevating motor 24b is driven under the control of the microcomputer 30, the intermediate gear 26b coupled to the shaft gear 25b of the elevating motor 24b is rotated,
The rotation of the intermediate gear 26b is transmitted to the turntable elevating drive gear 28 via the gear shaft 29b, and the turntable elevating drive gear 28 drives the turntable elevating gear 22 to rotate, so that the turntable 21 moves on and off together with the turntable elevating gear 22. Will be.

When the turntable 21 is stepped on and off while rotating, the upper limit height and the lower limit height are determined by the switch disk 31, the upper limit detection switch 32 and the lower limit detection switch 33 according to the principle described in the second embodiment. And is controlled by the microcomputer 30. As described above, the microcomputer 30 controls the turntable motor 24b and the turntable rotation motor 24a, which are stepping motors, to adjust the speed and position at which the turntable 21 is moved on and off, so that the height and the boarding speed suitable for each dish are adjusted. Can be secured.

On the other hand, FIG. 5 is a block diagram showing the automatic thawing apparatus 108 of the microwave oven of the present invention, and FIG. 6 is a circuit diagram showing the automatic thawing apparatus 108. As shown in FIG. 5, a turntable 21 is installed on a lower surface of the heating chamber 34, and a turntable vertical movement device 109 for getting on and off and rotating the turntable 21 is provided below the heating chamber 34.

A heater 35 for grilling food and drink placed on the turntable 21 is installed on the upper side of the inside of the heating chamber 34, and one side of the outside of the heating chamber 34 for high frequency is used for cooking. Is installed on one side of the wall surface of the heating chamber 34 in which the magnetron 36 is installed.
A passage hole (not shown) is formed so as to flow into the inside 4.

The upper heating chamber 3 of the heater 25
An intake port 34a for sucking air from the outside is provided at one side wall of
Is formed, and an exhaust port 34b is formed on the other side wall of the heating chamber 34 where the intake port 34a is not formed. A temperature sensing means 37 is provided below the exhaust port 34b, and a moisture sensing means 38 is provided on one side of the upper surface of the heating chamber 34.

The automatic thawing apparatus 108 for a microwave oven according to the present invention, having the above configuration, places the food to be thawed on the turntable 21 and then instructs the thawing mode. The vertical movement device 109 is driven, and the turntable 2
1 gets up and down and turns and rotates,
A temperature change around the exhaust port 34b is sensed by the temperature sensing means 37, while a moisture sensing means 38 senses the amount of change in moisture generated from the food or drink.

Accordingly, the total thawing time (Tt) and the high-frequency output level in each time period mode are determined based on the detected result, and the heater 35 and the magnetron 36 are driven based on the determined time and output level. Thus, decompression is performed. And, the rotation configuration for the automatic thawing is, as shown in FIG.
7, a control unit 39 for controlling the turntable vertical movement device 109 and the magnetron 36 based on the amount of change in temperature and moisture detected by the moisture sensing means 38 to execute thawing control; It comprises a chaos simulator 40 which receives the temperature and the amount of change in water sensed over time, outputs chaos data for appropriate thawing, and supplies the chaos data to the control unit 39.

At this time, the temperature sensing unit 37 and the moisture sensing unit 38 serve as a sensor input unit 200, the turntable vertical movement device 109 and the magnetron 36 serve as a driving load 300, and the control unit 39 serves as a microcomputer. In the automatic thawing method of the microwave oven according to the present invention, as shown in FIG. 7, when the food to be thawed is placed on the turntable 21 and the thawing mode is designated, the microcomputer 39 converts the thawing mode. The number (N) and the sensing time (Ts) are set, and during the sensing time (Ts), the temperature sensing means 37 and the moisture sensing means 38 are provided.
Is driven to detect a change in temperature and moisture, and a thawing time (T) is determined based on a result detected in the step.
d) and the initial value of the chaotic data (Po) are determined, and the initial value of the chaotic data (Po) determined in the above step is determined.
Output chaos data for each mode by
The high-frequency output level and time are determined for each mode based on the chaos data output in the above step, and the thawing of food is controlled by the step of driving the magnetron 36 with the determined time and output.

Hereinafter, the operation of the automatic thawing apparatus 108 for a microwave oven according to the present invention will be described in more detail. First, at the beginning of cooking, a temperature change of food and drink is sensed by the temperature sensing means 37 for a certain period of time, and a change amount of water (steam) generated from food and drink is sensed by the moisture sensing means 38. It is input to the computer 39. When the temperature of food and the amount of change in water are input to the microcomputer 39 in this manner, the microcomputer 39
The chaos data initial value is set based on the temperature and the amount of change in water input to the chaos simulator 40 and supplied to the chaos simulator 40. Then, the chaos simulator 40 supplies data for appropriate decompression to the microcomputer 39 based on the input initial value.

When the chaos data is supplied from the chaos simulator 40 to the microcomputer 39 as described above, the thawing time and the output based on the chaos data provided by the microcomputer 39 are determined, and the driving load 300 is controlled. , Automatic decompression is performed. At this time, the turntable 21 is also moved up and down at the same time, so that the high frequency of the magnetron 36 is evenly transmitted to all portions of the food and drink, and the optimum thawing is executed.

The thawing process by the control unit (microcomputer) 39 will be described below with reference to FIGS. 7 and 8. First, the microcomputer 39 senses the amount of change in the sensing signal of the temperature sensing means 37 and the moisture sensing means 38 for a predetermined time (Ts), and the number of mode conversions (N) taken first is "12" as shown in FIG. "And the temperature is changed as shown in FIG.
The description will be made on the assumption that the microcomputer changes the temperature by 30%, and when the moisture is changed as shown in FIG. 9B, the microcomputer determines that the moisture change is reduced by 20%.

As described above, the detected initial sensing time (T
The initial value (Po) (for example, P0 = 1.2) of the chaos simulator 40 is determined based on the temperature and the amount of change in moisture during s), and at the same time, the total thawing time (Td) (for example, 48 minutes) is determined. Further, chaos data is generated based on the initial value (P0 = 1.2) input by the chaos simulator 40 and output to the microcomputer 39.

For example, chaos data = 1.2 → 3.6 →
6.5 → 2.4 → 3.3 → 7.8 → 9.5 → 8.8 →
In the case of 6.6 → 4.5 → 3.1 → 2.6 →..., Only the chaos data of the number of mode changes (N) (N = 12) is taken, and the rest is taken. ignore. As described above, the chaos data input from the chaos simulator 40 is input and received by the microcomputer 39, and the already determined total thawing time (Td) is determined by the number of modes (N = 12).
Each mode time (Tm) is determined. In this example, Tm = 48 minutes / 12 = 4 minutes. Thereafter, the microcomputer 39 controls the output of the magnetron 36 corresponding to the chaos data so as to be appropriately thawed according to each mode time. That is, the microwave output is output every 12 minutes according to the chaos data.
% → 36% → 65% → 24% → 33% → 78% → 95%
→ 88% → 25% → 85% → 66% → 45% to defrost food and drink for a total of 48 minutes.

As described above, the food is thawed under the control of the microcomputer, so that the food can be thawed in a state most similar to a natural state, and the cost of manufacturing a microwave oven can be reduced because a weight sensor is not used. On the other hand, FIG.
(A) and FIG. 10 (B) are views showing the operation of the grill / combination dish control device for a microwave oven according to the present invention.

The apparatus and method for controlling the grill / combination dish 110 of the microwave oven according to the present invention are similar to those of the automatic thawing apparatus 108 of the microwave oven according to the present invention.
Turntable vertical moving device 107 according to the present invention shown in FIG.
The third embodiment of the present invention is characterized in that a turntable rotating motor 24a and a turntable lift motor 24b of a turntable vertical moving device 107 are installed, and are the same as the microwave oven automatic thawing device 108 of the present invention. Are denoted by the same reference numerals.

The grill / combined dish control method according to the present invention includes a step of judging a combination or grilled dish, and, if the judgment result in the above step is a grilled dish, raises the turntable 21 to the highest height and then stops. The step of rotating the grill at the set position and turning on the grill heater 35 to progress the grill cooking, and, when the result of the determination at this step is a combination cooking, determining the cooking mode (micro heating motor or heater heating mode). When the combination cooking mode discrimination dish in the above step is the micro heating mode, the step of driving the turntable 21 on and off and rotating and turning on the magnetron 36, and the result of the combination dish mode discrimination in the above step is a heater. In the heating mode, the turntable 21 is driven to get on and off and Consisting of the step of the grill heater 35 is turned on.

FIG. 11 is a flowchart showing a grill / combination dish control method according to the present invention, and FIGS. 4 and 10 (A).
And FIG. 10 (B) and FIG.
The operation of controlling the grill cooking and the combination control cooking by the combination microwave oven will be described below. As shown in FIG. 11, the microcomputer receives the user's dish selection information and determines whether the dish is a grill dish or a combination dish. When the user's dish selection is grill cooking, as shown in FIG. 4, the microcomputer 30 drives the stepping motor, which is the turntable getting on / off motor 24b, to raise the turntable 21 to the maximum height, and the detection is performed. When the maximum height is sensed by the switch 32, the turntable 21 does not rise any further. Next, power is supplied to the grill heater 35, and cooking is advanced by the heat of the heater 35, and at the same time, the turntable rotation motor 24b is driven. As described above, since the turntable is rotated close to the grill heater 35, the heat of the grill heater 35 is evenly transmitted to the food and drink, and the best browning effect is obtained.

When the set grill cooking time has been completed, the turntable motor 24b is driven to lower the turntable 21 to the minimum height. After the turntable 21 is fixed at the height, the cooking is finished.
On the other hand, when the user's selection of the dish is a combination dish, the cooking proceeds while the heating by the microwave and the heating by the heater are repeated.

Hereinafter, the combination dish will be described in more detail.
When a combination dish is instructed by the microcomputer,
The microcomputer determines whether the mode is the microwave heating mode or the heater heating mode.
When the result of the determination is the microwave heating mode, the magnetron 36 is driven to perform high-frequency cooking, and the turntable rotating motor 24a and the turntable getting on / off motor 24b are driven to turn the turntable 21.
Is driven on and off and rotated.

At this time, the turntable getting on / off motor 24
The driving speed of b is increased and the cycle of getting on and off the turntable 21 is increased so that the food is evenly heated. When the mode conversion time comes while the high-frequency heating cooking is in progress, the mode is switched to the heater heating mode. When the mode is switched to the heater heating mode in this manner, the heater 35 is driven to perform grill cooking, and also at this time, the turntable rotating motor 24a and the turntable getting on / off motor 2
4b are driven at the same time, and the turntable 21 is driven on and off and rotated. However, in the heater heating mode, unlike the microwave heating mode, the turntable getting on / off motor 24b is driven at a lower speed than in the microwave cooking to sufficiently secure the grilling effect of food and drink.
That is, when the grill cooking is performed in the heater heating mode, the cooking is performed by lowering the vertical movement speed of the turntable 21 so that the heat of the heater 35 is transmitted to the side and lower end of the food and drink. At the end, it ensures the browning effect of food and drink. Subsequently, during the grill cooking in the heater heating mode, when the mode conversion time comes, the mode is switched to the micro heating mode, and the above process is repeated.

The above-described process is repeated until the cooking completion time, and the combination cooking in which the microwave heating and the grill heater heating are repeated is advanced. When the set combination cooking time is completed, the turntable getting on / off motor 2 is turned on.
4b is driven to lower the turntable 21 to the minimum height. When the minimum height is sensed by the sensing switch 33, the turntable 21 is fixed at this minimum height, and the combination of the magnetron 36 and the heater 35 is combined. Cooking is finished.

As described above, if the turntable 21 is positioned at the lowermost end at the end of cooking, the user can easily draw food and drink. As another example, as shown in FIG. 6, the chaos simulator 40 is used to cook food by appropriately setting the vertical movement speed of the turntable 21 according to the heating time in the micro heating mode and the heater heating mode. You can also. That is, during the total cooking time, a natural cooking effect is expected by controlling the speed of getting on and off the turntable 21 with the chaos data by changing the microwave mode and the heater mode. For example, cooking time: turntable vertical movement speed The microwave 10
Second: 2 mm / sec → Heater 50 sec: 1.82 mm / sec → Microwave 10 sec 2.5 mm / sec → Heater 50 sec: 3.4 mm
./Sec...

[0059]

As described above, in the microwave oven according to the present invention, since the turntable is vertically moved on and off by the operation of the screw gear, stability can be ensured even when cooking food and drink in a liquid state. There is no need to install a support or rotating part having a cam curve for getting on and off the turntable on the bottom of the heating chamber, which simplifies the structure and eliminates the use of a weight sensor for thawing, thus reducing costs. To adjust the output based on the data simulated by the chaos simulator for temperature and moisture change during thawing, so that thawing similar to the natural state can be performed, and there is no need to use shelves during grilling and combination cooking, The food and drink are cooked evenly, and the effects of grill cooking can be guaranteed to the maximum.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a microwave oven turntable vertical moving device according to the present invention.

FIG. 2 is a detailed view showing a coupling relationship between a vertically moving gear and a turntable gear in the first embodiment of the microwave oven turntable vertical moving device according to the present invention.

FIG. 3 is a configuration diagram showing a second embodiment of the microwave oven turntable vertical moving device according to the present invention.

FIG. 4 is a configuration diagram showing a third embodiment of the microwave oven turntable vertical moving device according to the present invention.

FIG. 5 is a configuration diagram illustrating an automatic thawing apparatus for a microwave oven according to the present invention.

FIG. 6 is a circuit diagram showing an automatic defrosting device for a microwave oven according to the present invention.

FIG. 7 is a timing chart showing the automatic thawing method of the microwave oven according to the present invention.

FIG. 8 is a timing chart showing the relationship between the timing and the high-frequency output of the automatic thawing method of the microwave oven according to the present invention.

FIG. 9 is a graph of temperature sensing (A) and a graph of moisture sensing (B) for automatic thawing of a microwave oven according to the present invention.

FIG. 10A is a diagram showing the operation of the grill cooking device for a microwave oven according to the present invention, and FIG. 10B is a diagram showing the operation of the combination cooking device.

FIG. 11 is a view illustrating a process of controlling grill / combination cooking of a microwave oven according to the present invention.

FIG. 12 is an exploded perspective view (A) showing a conventional microwave oven turntable up / down moving device, and a cross-sectional view (B) showing the operation.

FIG. 13 is a block diagram showing a conventional automatic thawing method of a microwave oven.

FIG. 14A is a diagram showing a conventional method of grilling a microwave oven, and FIG. 14B is a diagram showing a method of combining cooking.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Turntable 22 ... Turntable getting on / off gear 23 ... Turntable rotating gear 24 ... Motor 25 ... Motor shaft gear 26 ... Intermediate gear 27 ... Turntable rotating driving gear 28 ... Turntable getting on / off driving gear 29 ... Gear shaft 30 ... Microcomputer DESCRIPTION OF SYMBOLS 31 ... Switch disk 32 ... Upper limit detection switch 33 ... Lower limit detection switch 35 ... Heater 36 ... Magnetron 37 ... Temperature sensing means 38 ... Moisture sensing means 39 ... Microcomputer 40 ... Chaos simulator

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location F24C 15/16 F24C 15/16 P G06F 15/18 G06F 15/18

Claims (14)

(57) [Claims] 1. A turntable driving device for a microwave oven, the turntable driving device comprising: a turntable that gets on and off and rotates with food and drink placed inside the microwave oven; A rotary shaft coupled to a lower central portion of the lower surface and installed vertically in a downward direction; a turn formed integrally with the rotary shaft outside the rotary shaft and having a screw-shaped gear formed on an outer peripheral surface thereof. A table gear, a central gear part formed on an outer peripheral surface of the turntable gear, a turntable rotating gear installed below the rotating shaft, and a central part penetrated by the rotating shaft; Power means for providing power used for getting on and off and rotating the table, control means for controlling the power means, the turntable getting on / off gear and turntable Comprising a power transmission means for transmitting power to the rotary gear, a position sensing means for sensing the maximum rise height and minimum descent height of the turntable, and further, the power means the turntable elevating gear and turn
It consists of a motor that provides the driving force for the table rotation gear.
The power transmission means is provided on one side of the rotating shaft.
Gears installed parallel to the rotation axis at a predetermined distance from
A shaft and the motor installed above the motor
A motor shaft gear for transmitting power generated from the motor;
Installed on the side of the motor shaft gear and penetrated by the gear shaft
An intermediate gear to be coupled, and the gear above the intermediate gear;
With the turntable rotating gear penetrated and connected to the shaft
Turntable rotary drive gear installed in meshing state
And the gear above the turntable rotary drive gear
Shaft penetrated and connected to the turntable getting on / off gear
Installed so as to mesh with the formed central gear part
Turntable with a screw-type gear formed on the outer peripheral surface
The control means executes forward / reverse rotation drive control of the motor.
The position sensing means is provided on the turntable getting on / off gear.
Power transmission with the turntable getting on / off drive gear is cut off
To form a lower idle gear,
Power transmission with the turntable getting on / off drive gear at the bottom of
Formed by forming an upper limit idle gear to be disconnected
It is the microwaves, characterized in that. 2. The microwave oven according to claim 1, wherein support grooves are formed at regular intervals on an outer peripheral surface of the rotating shaft. 3. The turntable rotary gear according to claim 2, wherein a groove is formed inside the turntable rotating gear at a position facing a support groove formed on an outer peripheral surface of the rotary shaft. microwave. 4. A support projection, which is supported by a spring, is installed in the groove, and a tip of the support projection is located in a support groove formed on the rotation shaft. 3. The microwave oven according to 3. 5. The power unit includes a turntable lift motor that provides power used for getting on and off the turntable, and a turntable rotation motor that provides power used for rotating the turntable. 2. The microwave oven according to claim 1, wherein the power transmission means comprises a getting on / off power transmission means and a rotary power transmission means, and the control means comprises the turntable getting on / off motor and a turntable rotation motor. . 6. The on / off power transmitting means includes: a gear shaft installed on one side of the rotating shaft at a predetermined distance from the rotating shaft in parallel with the rotating shaft; A motor shaft gear for transmitting power generated by the turntable motor, an intermediate gear installed on a side surface of the motor shaft gear and penetrating and coupled to the gear shaft; and the turntable rotation drive gear. A turntable lifting / lowering drive gear having a screw-shaped gear formed on an outer peripheral surface which is penetrated and coupled to the gear shaft at an upper portion thereof and is installed to be engaged with a central gear portion formed on the turntable lifting / lowering gear. 6. The method according to claim 5, wherein
Microwave oven described in. 7. The rotating power transmission means is provided on one side of the rotating shaft at a predetermined distance from the rotating shaft and in parallel with the rotating shaft, and on a top of the turntable rotating motor, A motor shaft gear for transmitting power generated from the turntable rotating motor; an intermediate gear installed on a side surface of the motor shaft gear and penetratingly coupled to the gear shaft; are, claim 5, characterized in that it is composed of a turntable rotating drive gear that is installed in a state engaged with the turntable rotating gear
The microwave oven as described. 8. A switch disk coupled to a lower surface of the turntable elevating gear for sensing the upper and lower limit positions of the turntable while being integrated with the turntable elevating gear, and the switch. An upper limit detection switch installed at an upper part of the disk and detected by the switch disk at a maximum rising height of the switch disk; and an upper limit detection switch installed at a lower part of the switch disk and at a minimum descending height of the switch disk. 2. The switch according to claim 1, further comprising a lower-limit sensing switch sensed by a switch disk.
Microwave oven described in. 9. An automatic thawing control device for a microwave oven, wherein the automatic thawing control device includes a turntable installed on a lower surface of a heating chamber of the microwave oven, and the heating device for getting on / off and rotating the turntable. A turntable vertical movement device installed at the lower part of the room; a heater installed inside the heating chamber for grilling food and drink placed on the turntable; and a food and drink placed on the turntable A magnetron installed on one side of the outside of the heating chamber for high-frequency cooking of an object, and an inlet formed on one side wall of an upper heating chamber of the heater for sucking air from outside the heating chamber. An exhaust port formed on the other side wall of the heating chamber in which the intake port is not formed in order to discharge air inside the heating chamber; and an exhaust port formed below the exhaust port. Temperature sensing means for sensing a change in temperature around the exhaust port for an initial fixed time; and moisture provided on one side of an upper surface of the heating chamber and sensing a change in moisture generated from food and drink for an initial fixed time. and sensing means, said controlling the driving of the turntable vertical movement device, a microcomputer for sensing the temperature and moisture of the variation to be generated from the food at a temperature sensing means and moisture sensing means, the
And the microcomputer further comprises the input temperature and
Set the initial value of chaos data based on the amount of moisture change and
To the male simulator, the chaos simulator based on the input initial values.
And the chaos data for proper decompression
A microwave oven, which is supplied to a computer to determine a thawing time and an output . 10. An automatic thawing control method for a microwave oven, the method comprising the steps of: placing a food to be thawed on a turntable and instructing a thawing mode; Setting the temperature, and detecting the amount of change in temperature and moisture by driving the temperature sensing means and the moisture sensing means during the sensing time; and initializing the thawing time and chaos data based on the result sensed in the step. Determining a value, outputting chaos data for each mode based on the initial value of chaos data determined in the step, and determining a high-frequency output level and time for each mode based on the chaos data output in the step. And controlling the thawing of the food and beverage by driving the magnetron at the determined time and output. Microwave oven to sign. 11. A grill / combination dish control device for a microwave oven, the grill / combination dish control device comprising: a turntable installed on a lower surface of a heating chamber of a microwave oven; A turntable up / down moving device installed at a lower portion of the heating chamber, a heater installed at an upper inside of the heating chamber for grilling food and drink placed on the turntable, and A magnetron installed on one side of the outside of the heating chamber for high frequency cooking of the food and drink placed thereon, and a magnetron formed on one side wall of an upper heating chamber of the heater for sucking air from outside the heating chamber. An exhaust port formed on the other side wall of the heating chamber where the intake port is not formed in order to discharge air inside the heating chamber, Temperature sensing means installed below the exhaust port; moisture sensing means installed on one side of the upper surface of the heating chamber for sensing the amount of change in moisture; and A microcomputer for determining whether the information is grilled food or combination food, and a position sensing means for sensing a maximum ascending height and a minimum descending height of the turntable , and further comprising the position sensing. Means are the upper and lower limit positions of the turntable
A switch disk that senses
Installed switch circle at the maximum rising height of the switch disk
An upper limit detection switch sensed by a plate, and the switch
The minimum descent height of the switch disk installed below the disk
Or the lower limit switch detected by the switch disk
A microwave oven characterized by comprising: 12. A method for controlling a grill / combi dish in a microwave oven, the method comprising: judging a combination or a grill dish; and when the result of the judgment in the step is a grill dish, After raising the turntable to the highest height, rotating the grill at the stopped position and turning on the grill heater to advance the grill cooking, and if the result of the determination in the above step is a combination cooking, the cooking mode Discriminating the combination cooking mode in the step is a micro-heating mode, the step of turning on and off and rotating the turntable and turning on the magnetron; the determination result of the combination cooking mode in the step When the heater is in the heater heating mode, the turntable is driven up and down and rotated, and the grill heater is turned off. Microwave oven, characterized by comprising the step of a. When wherein said grill or combi cooking is completed, in claim 12, wherein the controller controls so that food is easily taken out by stopping the lowers the turntable minimum height The microwave oven as described. 14. The microwave oven according to claim 12, wherein a vertical movement speed of the turntable in the micro heating mode is controlled to be lower than a vertical movement speed of the turn table in the heater heating mode using a chaos simulator.