KR0146107B1 - Automatic cooking method of microwave oven - Google Patents

Abstract

The present invention relates to a method and apparatus for automatic cooking of a microwave oven, and in the related art, since the sensing area of the infrared sensor is a whole part of the turntable, it shows a considerable difference from the temperature of food alone, and in the continuous operation, the turntable is hot in general. It shows a big difference from the actual food temperature, so the cooking performance is very bad.

Accordingly, the present invention is to adjust the sensing angle and area of the infrared sensor according to the position where the food is placed on the turntable, while moving the sensing angle and the sensing area in accordance with the movement of the food according to the rotation of the turntable, the temperature of the food Enhance your culinary performance by keeping you focused.

Description

Microwave automatic cooking method and apparatus

1 is a block diagram of an automatic cooking apparatus of a conventional microwave oven.

2 is a temperature sensing area detected by the infrared sensor in FIG.

3 is a block diagram of an automatic cooking apparatus for a microwave oven according to the present invention.

4 is a temperature sensing region and rotation direction display diagram when the load is eccentrically positioned in FIG.

FIG. 5 is a detailed view of the portion A showing the sensing angle of the initial state and the load in the center of FIG.

FIG. 6 is a detailed view of part A showing the sensing angle and rotation direction when the load is eccentric in FIG.

7 is a load position and a sensing graph according to the load position on the turntable.

(a) is a sensing flow chart of the load placed on the turntable,

(b) is the sensing graph when the load is in the center,

(c) to (f) are sensing graphs when the load is eccentric,

(g) is the sensing graph when the load is wide and flat.

8 is a circuit diagram of a motor controller for driving a turntable motor and two synchronous motors in FIG.

9 is a detailed view of the motor control apparatus in FIG.

Figure 10 is a flow chart for the automatic cooking method of the present invention a microwave oven.

Figure 11 is one embodiment of the prior art.

12 is an operation explanatory diagram of FIG.

FIG. 13 is a detailed view of the sensor moving means in FIG.

* Explanation of symbols for main parts of the drawings

101: infrared sensor 102: magnetron

103: heating room 104: turntable

105: turntable motor 106: food

107: waveguide 108: analog / digital converter

109: microcomputer 110: key input

111: magnetron drive unit 112: turntable motor drive unit

113: position angle control

The present invention relates to a method and apparatus for automatic cooking of a microwave oven, in particular by focusing the sensing angle of the infrared sensor only on the load, and to cook according to the sensing angle of the sensor according to the movement of the load according to the movement of the turntable. The present invention relates to an automatic cooking method and apparatus for a microwave oven capable of greatly improving cooking performance.

The automatic cooking apparatus of a conventional microwave oven includes a heating chamber for heating food as shown in FIG. 1, a turntable positioned at a lower end of the heating chamber to accumulate the food, a turntable motor for rotating the turntable, and An infrared sensor for detecting the surface temperature generated when cooking food, an analog / digital converter for converting and outputting the analog temperature value detected by the infrared sensor into digital data, and the analog / A microcomputer that controls the magnetron based on the data value transmitted through the digital converter to perform automatic cooking at the proper temperature of the food, a waveguide for guiding the electromagnetic waves generated from the magnetron to the heating chamber, and a user's desire. Select a function to recognize the microcomputer It is composed of a key input to the.

In addition, one conventional embodiment is a cooking means for cooking food as shown in Figure 11, a turntable for loading the food, an infrared sensor for detecting the surface temperature of the food in a non-contact using a spot, and the infrared Sensor moving means for moving the detection spot position by the sensor to the radius of the turntable, temperature data storage means for storing the detected temperature data corresponding to each of the detection spot positions, and the shape of the food based on the temperature data. After calculating the food rotation radius calculating means and the food rotation radius, the position of the detection spot of the infrared sensor by the sensor moving means is moved to the corresponding rotation radius position to detect the temperature, and the temperature is measured by the radial temperature data. And cooking control means for controlling the cooking means.

When described in detail based on the conventional configuration and the configuration for an embodiment configured as described above are as follows.

When the user wishes to cook, the corresponding food (6) is placed on the turntable (4) of the heating chamber (3), the microwave oven door is closed, and the desired function is pressed through the key input unit (10). (9) recognizes and outputs a drive signal to the magnetron driver 11 to operate the magnetron (2).

When the magnetron 2 is driven to generate electromagnetic waves, the waveguide 7 is guided to be delivered to the food 6 of the heating chamber 3.

Therefore, the food 6 is gradually heated, and at this time, the heat generated from the food 6 is sensed by the infrared sensor 1 mounted on the heating chamber and transferred to the analog / digital converter 8.

Accordingly, the analog / digital converter 8 converts the sensed temperature value of the analog into digital data and transmits it to the microcomputer 9. The microcomputer 9 converts the temperature of the food based on the data value. By grasping and controlling the output of the magnetron 2 in accordance with the temperature, the food 6 is automatically cooked.

When the cooking is performed through the operation as described above, the sensing area of the food 6 detected by the infrared sensor 1 is the entire portion of the turntable 4 storing the food 6 in the heating chamber 3. The temperature detected by the infrared sensor 1 becomes an average temperature obtained by adding up the food 6 temperature and the surface temperature of the turntable 4.

That is, as shown in FIG. 2, since the sensing area of the infrared sensor 1 is a whole part of the turntable 4, the temperature of the food 6 alone is quite different.

In addition, during the continuous operation as a whole turntable (4) is a hot state shows a big difference from the actual food (6) temperature has a disadvantage that the cooking performance is quite bad.

And, description of the operation of the embodiment of the prior art and the problems of the prior art are as follows.

When the food 2 'is placed on the turntable 3' in the heating chamber 1 'and the cooking is started, the rotating motor 11' is rotated to rotate the turntable 3 'and the cooking means 4'. The cooking of the food 2 'on the turntable 3' is started by electromagnetic waves.

At this time, the infrared sensor moving means 8 'moves the infrared sensor 5' to move the infrared detection spot 12 'to the other side from the center 3a of the turntable 3' as shown in FIG. The injection is repeated between the ends 3b.

Then, the food turning radius calculating means 10 calculates the distance R from the center 3a of the turntable on which the food 2 'is placed, i.e., the rotation radius of the food, as shown in FIG. 2 ') recognizes the position where it lies, and the infrared sensor moving means 8' moves the infrared detection spot 12 'to fix it.

Therefore, as the cooking proceeds, the infrared sensor 5 'senses the temperature of water vapor, gas and air generated in the food 2' through the opening 7 'and transfers it to the temperature data storage means 9'. do.

When the temperature data storage means 9 'provides the received temperature data to the food rotation radius calculation means 10, the food rotation radius calculation means 10 cooks according to the provided temperature data and the rotation radius of the food. The running time is calculated and output to the cooking control means 6 '.

Accordingly, the cooking control means 6 'controls the cooking means 4' and the rotating motor 11 'to cook during the cooking progress time.

At this time, as the cooking proceeds, the infrared sensor 5 'senses the temperature of the food 2' once every cycle by the rotation of the turntable 3 'to allow the cooking to proceed.

FIG. 13 shows a part of the sensor moving means 8 ', and the infrared detection spot is set by the infrared sensor 5' mounted on the rotating shaft 8b of the motor 8a appropriately setting an arbitrary angle θ. 12 'may scan the radius of the turntable 3'.

Further, the rotation shaft 8b is provided outside the heating chamber 1 'in the upper direction in the middle of the center 3a of the turntable 3' and the other end 3b, and through the opening window 7 '. By setting the inside of the heating chamber 1 'to a desired configuration, the spot length on the turntable 3' of the infrared detection spot 12 'becomes almost uniform.

Therefore, even if the rotation radius of the food is different, the temperature can be detected under almost the same conditions.

However, in the conventional exemplary embodiment as described above, since the temperature of the food is sensed only once per one rotation period of the turntable, the accuracy of the sensing temperature is reduced, and the detection spot is repeated only from the center of the turntable to one end. There is a problem in that it takes a long time to recognize the location of the load because the location of the load by scanning.

Accordingly, an object of the present invention is to adjust the sensing angle and the area of the infrared sensor according to the position of the food on the turntable, the food while moving along the sensing angle and sensing area in accordance with the movement of the food according to the rotation of the turntable The present invention provides an automatic cooking method and apparatus for a microwave oven to improve cooking performance by continuously monitoring the temperature of the.

The method for achieving the above object is a first step of checking the position of the load placed on the turntable at the same time as the start of cooking, and if the load is located in the center in the first step after adjusting the sensing angle so that the magnetron and turntable A second step of driving the cooking process and a third step of eccentrically adjusting the sensing angle toward the load when the load is eccentrically positioned in the first step, and after adjusting the sensing angle in the third step, At the same time, the turntable motor and the synchronous motor are rotated at the same direction and at the same rotational speed, and the fourth step of cooking is carried out while tracking the load, and the load temperature is sensed when cooking is performed in the second and fourth steps. When it reaches, the fifth step is to end the cooking.

The apparatus for carrying out the method comprising the steps comprises: a heating chamber for heating food, a turntable positioned at the lower end of the heating chamber to accumulate the food, a turntable motor for rotating the turntable, and an upper portion of the heating chamber. Equipped with an infrared sensor for detecting the surface temperature generated when cooking a sound object, a position for controlling the sensing angle and position of the infrared sensor, an angle controller, and a digital temperature value detected by the infrared sensor. Analog and digital converter to convert and output the data, and the magnetron on the basis of the data value transmitted through the analog / digital converter to perform automatic cooking at the proper temperature of food and to the position, angle control unit Micro outputting a control signal for controlling the position and angle of the sensor A computer, a waveguide for guiding electromagnetic waves generated from the magnetron to a heating chamber, and a key input unit for selecting a function desired by a user and allowing the microcomputer to recognize the same.

When described in detail with respect to the operation and effect of the present invention configured as described above.

When the food 106 to be cooked is placed on the turntable 104 in the heating chamber 103, the microwave door is closed, and then the microcomputer 109 presses a function to be performed through the key input unit 110. After recognizing the function, the temperature of each part of the turntable 104 is measured through the infrared sensor 101.

That is, as shown in FIG. 5, when the center of the turntable 104 is measured and output to the analog / digital converter 108 and transmitted to the microcomputer 109 in the initial state, the microcomputer 109 is positioned and angled. When the motor drive signal is output to the control unit 113, the synchronous motor b 20 rotates forward. When the circular gear 30 rotates by this forward rotation, the linear gear 50 which is a part of the guide bundle 90 which engages and linearly moves. The bundle of guides 90 is moved to the left by the action of) to be in a state as shown in FIG.

In other words, the left side of the guide bundle 90, the guide groove 55 on the back so that the fixed shaft pin 65 located on the fixed shaft 40 can flow along the circumference around the infrared sensor 101 It is dug, the right shaft portion of the guide bundle 90 is composed of a linear gear 50 meshing with the circular gear 30, the middle portion of the guide bundle 90 is configured integrally with the synchronous motor a (60) When the forward and reverse rotation of the circular gear 30, the guide bundle 90 and the synchronous motor a (60) are moved together in a circumferential constant distance around the infrared ray (101).

In addition, the synchronous motor a (60) has a rotary shaft 70 is bent at a predetermined angle twice, the lower portion of the rotary shaft 70 is equipped with a cone top gear 75, the cone top gear 75 The conical rotary lower gear 80 to support and rotate is attached to the heating chamber wall 95, and the infrared sensor 101 is mounted at the end of the rotating shaft 70.

Meanwhile, the guide bundle 9 is moved to the left by the forward rotation of the circular gear 30 and the guide of the guide groove 55, so that the temperature of the position ② ′ in FIG. After the measurement, the area detected by the infrared sensor 101 by the forward rotation of the synchronous motor a 60 rotates clockwise as shown in Fig. 7 (a), as in ② '→ ③' → ④ '→ ⑤'. If so, the infrared sensor 101 measures the temperature of each part and transmits the temperature to the analog / digital converter 108.

That is, first, the position of ① ', which is the center of the turntable 104, is first measured, and then, ②' is started, and the clockwise direction ③ '→ ④' → ⑤ 'is advanced.

In this case, assuming that the food 106 accumulated on the turntable 104 is a frozen food, various sensing graphs from (b) to (g) of FIG. 7 may be seen depending on the position and shape stored on the turntable 104. Since the portion where the temperature is particularly lower than the other portion is the portion where the load is located, the microcomputer 109 stores this position.

By using this method to check whether the position of the food 106 on the turntable 104 in the center or eccentricity to control the position and angle of the infrared sensor 101 accordingly to perform accurate heating cooking First, let's look at the case where it is determined that the load is in the middle.

If the food 106 is located in the center of the turntable 104, since the sensing angle of the infrared sensor 101 should be adjusted to the center, if the synchronous motor b20 is rotated in the same state as in FIG. 6, the circular gear 30 With the reverse rotation of the guide and the guide groove 55, the guide bundle 90 moves a certain distance on the circumference centering on the infrared sensor 101 to the right and the infrared sensor 101 as shown in FIG. The area that is detected is centered.

After the sensing angle of the infrared sensor 101 is adjusted in the same manner as described above, when the microcomputer 109 recognizes the sensing angle, the driving signal is output to the magnetron driving unit 111 so that the magnetron 102 is turned on, and the turntable motor driving unit is turned on. The turntable motor 105 is driven by outputting a drive signal to the turntable 112 to rotate the turntable.

Therefore, as the electromagnetic wave generated in the magnetron 102 is guided by the waveguide 107 to the food 106 in the heating chamber 103 and the turntable 104 is rotated by the turntable motor 105, the cooking proceeds. As the cooking proceeds, the infrared sensor 101 continuously detects the temperature of the food 106 and transmits it to the microcomputer 109 through the analog / digital converter 108 to zoom in to the set temperature. When you reach it, you will end your cooking.

Here, in the case where the food is generally flat, the sensing graph as shown in (g) of FIG. 7 can be seen. In this case, the food is considered to be in the center and the cooking is performed.

On the other hand, when the load is eccentrically positioned in the center of the turntable 104, the microcomputer 109 outputs a motor drive signal to the position and angle control unit 113 to eccentrically adjust the sensing angle toward the load. need.

That is, when it is determined that the load is in the position of ② 'on the turntable 104 shown in (a) of FIG. 7 through the process of confirming the load position as described above, in the initial state as shown in FIG. By rotating the synchronous motor b (20) forward, the forward rotation of the circular gear (30) and the linear gear (50) and the guide groove (55) guide the bundle (90) of the circle centered around the infrared sensor (101). The distance detected by the infrared sensor 101 is adjusted to the position of the load as shown in FIG.

On the other hand, even if the load is placed at any other position on the turntable 104, the position controlled by the microcomputer 109, the forward and reverse of the synchronous motor a 60 and the synchronous motor b 20 of the angle control unit 113 By rotation, the sensitivity angle can be adjusted toward the load.

Therefore, when the sensitivity angle adjustment to the eccentric load is finished, the magnetron 102 is turned on to generate electromagnetic waves, and the turntable motor 105 and the synchronous motor a 60 are simultaneously rotated at the same rpm in the same direction.

That is, the synchronous motor a 60 is rotated in the same direction and period as the turntable 104 rotates while the sensing angle is adjusted to the load, thereby guiding the upper cone gear 75 and the lower cone gear 80. Since the low sensor sensing area is adjusted to the load and rotates according to the cycle of the turntable 104, the infrared sensor 101 tracks the load and continuously detects the load temperature.

As shown in FIG. 9, when the microcomputer 109 first applies the trigger signal iG1 to the motor, the motor rotates forward. When the trigger signal iG2 is first applied to the motor, The motor reverses.

When the load temperature is converted into digital data by the analog / digital converter 108 and transferred to the microcomputer 109, the microcomputer 109 accepts the input data and checks whether the set temperature is reached. 109 outputs the driving stop signal to the magnetron driver 111 and the turntable motor driver 112 to stop the operation, and then ends cooking.

Referring to the operation as described above based on FIG. 10 again, when cooking starts, first check the position of the load, check which position the load is in, and when it is located in the center, adjust the sensing angle to be in the center. The magnetron 102 and the turntable motor 105 are driven to allow cooking to proceed.

As the cooking proceeds, the infrared sensor 101 continuously detects the load temperature and ends the cooking when the set temperature is reached.

In addition, if the position of the load is located eccentrically, after adjusting the sensing angle toward the load by the forward and reverse rotation of the synchronous motor a (60) and the synchronous motor (b) 20, the magnetitetron (102) And simultaneously turn the turntable motor 105 and the synchronous motor a (60) at the same rpm in the same direction at the same time, and continuously detects the load temperature while tracking the load, and when the set temperature is reached, the cooking is finished. Finish cooking.

As described in detail above, in the present invention, even if the load is placed on any position on the turntable, the sensing angle is adjusted to the load position so that the infrared sensor senses the load temperature and proceeds cooking while rotating in the same direction and cycle as the turntable rotation. It is possible to detect the surface temperature precisely, so that the cooking performance can be greatly improved.

Claims (4)

The first step of checking the position of the load placed on the turntable at the start of cooking, and if the load is located in the center of the first step, adjust the sensing angle of the infrared sensor to be in the center and then drive the magnetron and the turntable to cook. A second step of proceeding; a third step of eccentrically adjusting the sensing angle toward the load when the load is eccentrically positioned in the first step; and a turntable motor and a synchronous motor after the sensing angle is adjusted in the third step. The fourth step of proceeding cooking while tracking the load while rotating a (60) in the same direction and the same cycle at the same time, and when the cooking temperature in the second and fourth steps, the load temperature is detected and the cooking temperature is reached The automatic cooking method of the microwave oven, characterized in that the fifth step of terminating. The method of claim 1, wherein in the first step, when the load position is determined, the sensing angle of the infrared sensor is adjusted to measure the temperature of the entire area on the turntable, and the area where the food is placed is particularly high or low. How to cook microwave ovens. In a microwave oven for cooking by using an infrared sensor, the position angle control means for controlling the sensing angle and position of the infrared sensor while tracking the load, and the analog temperature value detected by the infrared sensor while tracking the load And an analog / digital converter that converts the digital data into a digital data and outputs it, and controls the magnetron based on the data value transmitted through the analog / digital converter to perform automatic cooking at a proper temperature of the food. And a microcomputer configured to output a control signal for controlling the position and angle of the sensor toward the load position by the angle control means. The guide according to claim 3, wherein the position and angle control means includes a fixed shaft having a fixed shaft pin formed at an end thereof so that the angle adjusting means corresponds to a turntable at an upper end of the microwave cavity, and a guide groove is formed to be inserted into the fixed shaft pin and slide. A synchronous motor b is established on the bundle and a synchronous motor a is coupled to the top of the microwave oven to move the guide bundle by engaging the gear formed on one side of the guide bundle. A multi-rotation shaft with a gear fixedly inserted therein, wherein a lower cone gear is formed to engage the upper cone rotating gear.