KR910005119B1 - Cooking method for microwave oven - Google Patents

Abstract

The method uses state variables of a microwave oven so that a thermister in not used for auto cooking. When auto cooking key is depressed, the standard times according to the power levels of each auto cooking modes are operated with the state variables varied according to the auto cooking modes to calculate the efficient cooking time. The state variables are: (A) standard auto cooking time (To) according to the auto cooking modes; (B) pause time (α) between the former cooking and the present cooking, (C) time compensation variable (K) according to the modes, and (D) door variable (β) determined by the open/close of the door. The cooking time T is determined by the formular (T0-αk+β).

Description

Automatic cooking control method of microwave oven

1 is a block diagram of a typical microwave oven circuit.

2 is a flowchart showing a method of controlling automatic cooking of a general microwave oven.

3 is a flowchart showing a method for controlling automatic cooking of the microwave oven according to the present invention.

4 is a table of the automatic cooking mode and the standard automatic cooking time (TO) according to the power level of the microwave oven of the present invention.

5 is a table showing the state of the level variable (α) according to the INTERVAL TIME of the present invention.

6 is a table showing the open and closed state variables β of the door during the downtime of the present invention.

7 is a table showing a compensation time variable (K) according to the automatic cooking change in the present invention.

8 is a change graph showing the compensation time when the automatic cooking 1, 2, 3 is selected after performing the automatic cooking 1 in the microwave oven of the present invention.

9 is a change graph showing the compensation time when the automatic cooking 1,2,3 is selected after performing the automatic cooking 2 in the microwave oven of the present invention.

10 is a change graph showing the compensation time when selecting the automatic cooking 1,2,3 after performing the automatic cooking 3 in the microwave oven of the present invention.

* Explanation of symbols for main parts of the drawings

1: micom 2: key input

3: Display unit 4: Temperature state detection unit

5 output unit 6 power supply unit

P ₁ , P2, P ₃ : routine

The present invention checks and judges the surrounding conditions in a microwave oven with a built-in heater without using a temperature sensor thermistor and calculates the cooking time to suit the situation. It is about a method.

In general, a conventional microwave oven with a built-in heater detects a determination of the current cooking room temperature by the demister of the temperature state detecting unit 4 when the desired cooking is set in the key input unit 2 as shown in FIG. The temperature state is applied to the microcomputer 1.

In addition, according to the control method as shown in FIG. 2, the microcomputer uses a method of cooking by setting the time which is added or subtracted from the standard cooking time by the current temperature level as the actual automatic cooking time and displaying it on the display. However, in the conventional microwave oven equipped with a combined heater, there is a disadvantage that the use of a temperature sensor thermistor, which is an expensive component, was to cause a price increase of the product.

In addition, there is a disadvantage that the heating is uneven due to the temperature error during the actual cooking depending on the mounting position of the temperature sensor thermistor and the distance to the heater.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a standard time according to the power level of each auto cooking mode, regardless of the number of auto cooking modes, without using the temperature sensor which is a temperature sensor during automatic cooking. The purpose of the present invention is to provide an automatic cooking control method of a microwave oven that can calculate actual automatic cooking time by associating state variables that vary with various modes.

This object can be achieved by enabling the pre-computation of various variables for situations that can be represented in each automatic cooking mode without using a temperature sensor.

The characteristics of the present invention are the standard automatic cooking time by each automatic cooking 1,2,3 ---, the level for detecting the down time of the previous cooking, and for each automatic cooking 1,2,3 --- Compensation time variable according to the mode conversion, door state variable by the opening and closing of the door and the state variable by calculating the actual automatic cooking time by calculating the automatic cooking without using a temperature sensor.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The present invention provides a microcomputer 1 for controlling the operation of each circuit as shown in FIG. 1, a key input unit 2 for inputting various operation commands to the microcomputer, a display unit 3 for displaying various operation states, and It consists of an output unit 5 which operates under the control of the microcomputer and a power supply unit 6 which supplies an interrupt signal to the microcomputer 1, and according to the present invention, in the block diagram of a general microwave oven circuit, the temperature state sensing unit 4 Removing configuration for

3 is a flowchart showing the automatic cooking control method of the hybrid microwave oven according to the present invention, and shows a control method relating to calculation and setting processing of actual cooking time from automatic cooking key input.

That is, when automatic cooking is selected as a key of the key input unit 2 to perform automatic cooking, what is the automatic cooking by receiving the automatic cooking key input P ₁ ?

In the judging routine (P ₂ ), determine which of the automatic dishes 1,2,3 --- and determine the power level. Is determined by the routine P ₃ . The power level is divided into HIGH, MED and LOW, and the corresponding standard cooking time is put into the automatic cooking constant (P ₄ ) and the next routine is performed.

In the next routine (P ₅ -P ₇ ), the cooking mode (the type of dish done last time). Determine the state.

The power level routines (P ₃₎ is of the 1, 2, 3 and steel, as automatic dish fourth help, depending on the drug and calculating the standard automatic cooking time (T ₀₎ on a standard cooking time the routine (P ₄₎ Data is stored as auto-cooking constants. A routine for setting a rest level among the old cooking The mode (P ₆₎ is As shown in Fig. 5 with respect to the respective rest-time (INTERVAL TIME) is set to the idle level (α).

In addition, the door check routine P ₇ detects the door opening / closing state during the idle time as shown in FIG. 6, and stores the value at the time of opening (3 seconds) and closing (0) as the door state variable β.

In the routine (P ₈ ), which determines what the next old cooking mode is (previously, what is the previous dish), it is calculated by dividing it into (HIGH) (MED) (LOW) levels according to each cooking midstream, ) Is not currently displayed.

For example, when comparing only the strong and weak levels (HIGH, LOW), the routine (P ₁₁ ) (P ₂₂ ) compares the value of the variable with the value of the idle time level (α) and the door constant variable (β). , Save, and perform a subtraction routine in routine P ₁₂ (P ₂₂ ) so that the reduced decrease INTV is stored in routine P ₁₃ (P ₂₃ ).

Next, the above routines are repeated until the reduction value comparison routine (P ₁₄ ) (P ₂₄ ) is smaller than (0), and then the cooking time calculated in the routine (P ₈ ) is displayed on the display unit, and then in the routine (P ₁₀ ). Start the auto cooking.

In particular, the routines are to compensate for the subtraction routine (P ₁₂ ) (P ₂₂ ) by determining the compensation time variable (K) that determines the cooking time compensation according to the change state of the automatic cooking mode to be performed after the previous cooking. With the help of the automatic cooking 1 automatic cooking 1,2,3, automatic cooking 2 → automatic cooking 1,2,3, automatic cooking 3 → automatic cooking 1,2,3 It will supply data for time in seconds.

That is, in FIG. 8, automatic cooking 1 → automatic cooking 1,2 as shown in a graph showing correlations between the automatic cooking mode between idle time and compensation time as shown in FIGS. 8, 9 and 10. FIG. During the 10 minute rest period when it is changed to, 3, the rest level α and the time variable K are gradually changed from 50 seconds to 0 seconds.

And the standard automatic cooking time, door open and close state variable compensation time variable may vary slightly depending on the microwave oven, but the applied variable can be used fixedly.

Therefore, the calculation basis of the actual automatic cooking time T applied is to set the type and power level of the automatic cooking to be made by performing the input of the automatic cooking key and the routine P _{1 of} FIG. 3.

In addition, the corresponding standard cooking time (T ₀ ) is stored in the memory (routine P ₄ ), the previous cooking was judged whether there was a routine (routine P ₅ ), and the idle level was determined (P ₆ ) during the rest period. The subroutine decreases the compensation time variable according to the state of the door and the previous dish until the idle level becomes (0) (from routine P ₁₁ to routine P ₁₄ .

T = T ₀ -αK + β

T: Automatic cooking time actually applied

T ₀ : Standard auto cooking time

α: idle time level variable

K: compensation time variable according to mode change

β: Variable of door open and locked

As a result, the present invention is to check and determine the various fluctuations in the standard cooking time when the start processing proceeds after the automatic cooking key input to calculate the appropriate automatic cooking time to be effective automatic cooking.

As described above, the present invention can calculate the actual cooking time by allowing the variables that can be generated according to each auto cooking mode to be calculated from each other at a standard time set according to each auto cooking mode without using a temperature sensor detector. It can reduce the cost of the product by not using the expensive temperature sensor, and it is effective to eliminate the temperature error caused by the mounting position and condition of the temperature sensor.

Claims (3)

In the microwave oven control method for cooking by determining the temperature state inside the cooking chamber through the input state of the microcomputer (1) the temperature state detected by the temperature detector of the temperature state detection unit 4, each automatic cooking 1, Standard automatic cooking time (T ₀ ) by 2,, 3 ---, idle time level (α) for detecting the rest time of the previous dish, and mode for each automatic dish 1,2,3 --- Microwave oven that does automatic cooking without using temperature sensor by calculating compensation time variable (K) according to the change and door state variable (β) by opening / closing and closing the door and calculating the actual automatic cooking time (T). Automatic cooking control method. The automatic cooking control method of the microwave oven according to claim 1, wherein the actual automatic cooking time (T) at the time of cooking after the automatic cooking mode key input satisfies the following equation. T = T ₀ -αK + β Where T: Automatic cooking time T ₀ : Standard auto cooking time α: rest time variable K: compensation time variable according to automatic cooking mode change β: Door state variable The method according to claim 1 or 2, wherein the power level after the automatic cooking is selected, the standard cooking time selected by the power level, and the old cooking mode for determining the presence or absence of the previous cooking. The automatic cooking control method of the microwave oven which can be processed by dividing it into levels of low, low, and low.

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