JPH051821A - Device of cooking by heating - Google Patents

Abstract

PURPOSE:To make unnecessary switch input for setting the number of foods cooked by heating and carry out the most suitable control of cooking according to the amount of foods to be cooked in the case in which a food to be cooked is cooked by heating. CONSTITUTION:A controller 19 controls the cooking time according to the result of weight detection by a weight sensor 9 and the result of gas volume detection by a gas sensor 15 after a certain time has passed from starting the cooking. It is, therefore, possible to determine the cooking time most suitably according to the number of foods and the thickness of a food to be cooked by heating, and the roasting of a food to be cooked is never excessive or short. Furthermore, since the number of foods to be cooked is judged automatically, there is no need to provide a switch that specializes in setting the number of foods.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heating cooker having a toast function.

[0002]

2. Description of the Related Art Conventionally, when baking a loaf of bread with a heating cooker having a toast function, one or two breads are usually baked. In this case, the user sets the cooking time (heating time). However, the time set by the user is not always set to the optimum cooking time, and the bread is often overbaked or underbaked.

As a countermeasure against this, a dedicated switch for inputting the number of breads, for example, a "one-piece" switch and a "two-pieces" switch, is provided so that the user can set the number of breads in advance. Is considered. In this case, on the heating cooker side, the optimum cooking time corresponding to one slice of bread and two slices of bread is previously held as data by experiments and the cooking time is automatically set according to the setting of the user.

[0004]

However, in the above-mentioned case, there is a problem that the number of switches increases, and if the number of breads is simply set, the thickness varies depending on the breads. It is not always possible to set it, and there was a problem of poor reliability.

Therefore, an object of the present invention is to provide an optimum cooking control according to the amount of cooked food, without requiring a switch input for setting the number of cooked foods when the cooked food is cooked. It is to provide a heating cooker capable of automatically performing.

[0006]

The present invention has been made by paying attention to the following points. That is, when the cooked food is heated and cooked, the number and thickness of the cooked food can be considered as factors necessary for determining the optimum cooking time. That is, when the number of foods increases, the heating and cooking time becomes longer, but in this case, if the thickness is the same, the heating and cooking time becomes longer. Then, it has been found that the number of cooked foods can be determined to some extent by the amount of gas generated during cooking. In this case, if the thickness is taken into consideration by the weight sensor, the optimum cooking time can be obtained.

The cooking device of the present invention comprises a heating means for heating the food to be heated contained in the cooking chamber, a weight sensor for detecting the weight of the food to be heated, and the amount of gas generated in the cooking chamber. And a control means for controlling the cooking time according to the weight detection result of the weight sensor and the gas amount detection result of the gas sensor after a fixed time has elapsed from the start of cooking.

[0008]

According to the above means, the cooking time is controlled according to the weight detection result by the weight sensor and the gas amount detection result by the gas sensor after a fixed time has elapsed from the start of cooking.
It is possible to optimally determine the cooking time in which the thickness is added to the number of cooked foods, so that the cooked foods are neither over-baked nor under-baked. Moreover, since the number of cooked foods can be automatically determined, a dedicated switch for setting the number of cooked foods is not required.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 2 and 3, an inner case 2 is provided inside the main body case 1, and the inside of the inner case 2 serves as a cooking chamber 3. A door 4 is provided on the front surface of the main body case 1, and an operation panel 5 is provided. In addition to the display 6 provided on the operation panel 5, a start switch, an automatic cooking switch,
Various switches 7 such as a toaster switch and a time setting switch are provided.

On the outer surface of the bottom plate of the inner case 2, a turntable motor 8 for rotating the grill 2c is provided, and a weight sensor 9 for detecting the weight of the food to be heated is provided. Further, a lower heater 10 as a heating means is provided, and an upper heater 11 as a heating means is also provided on the outer surface of the upper plate portion of the inner case 2.
Further, an excitation port 12 is formed in the side plate portion of the inner case 2, and a magnetron 14 is attached to the excitation port 12 portion via a waveguide 13. Also, inner case 2
An exhaust port 2a and an exhaust passage 2b are formed in the side plate portion. A gas sensor 15 is arranged inside the exhaust passage 2b. The gas sensor 15 detects the generation amount of water vapor and other gases, and outputs the gas amount detection by voltage. The output voltage decreases as the detected gas amount increases.

On the inner surface of the main body case 1, the fan motor 1
An air blower 18 composed of 6 and blades 17 is provided. When the air blower 18 is operated, outside air is taken in through an intake port (not shown) of the main body case 1, and the magnetron 14 is air-cooled into the cooking chamber 3. Inflow and exhaust port 2a
And it is discharged out of the main body case 1 through the exhaust passage 2b.

FIG. 1 shows an electrical configuration. The operation control circuit 19 is configured to include an A / D converter and a microcomputer, which has a turntable motor 8 and a lower heater 1 according to an operation program stored therein.
0, the upper heater 11, the magnetron 14, and the fan motor 16 are driven and controlled via drive circuits 20 to 24, respectively, and the display 6 is also controlled. The operation control circuit 19 also functions as control means.

Now, the operation of the above configuration will be described together with the above-mentioned respective functions of the operation control circuit 19. 4 and 5 show flowcharts of the control contents of the operation control circuit 19. This flow chart starts when the toast switch is operated. In addition, in FIG.
When the bread at room temperature is sliced into one (8 slices) (shown by line A), one sliced (6 slices) (shown by line B), two sliced ( The change in the gas generation amount is shown in each of the two cases of thick cutting (shown by line C) (shown by line D), and the smaller the value on the vertical axis, the larger the gas generation amount.

When the toast switch is operated, the weight W detected by the weight sensor 9 is read (step S1), and the time counting by the soft timer is started (step S2). After this, blower 1 for 5 seconds
A so-called cleaning operation for driving residual gas to be discharged is executed (step S3), and the heaters 10 and 1 are operated.
1 is energized (step S4). After that, the maximum output value Vmax from the gas sensor 15 is detected for 5 to 60 seconds from the start of cooking (step S5).

When 60 seconds have passed from the start of cooking, the blower 18 is operated (step S6), and when 67 seconds have passed thereafter, the output value of the gas sensor 15 (this is referred to as A) is read (step S7). Then, it is judged whether or not the rate of change Gh (Gh = 1- (A / Vmax)) of the gas generation amount is a reference value in this case 0.27 or more. It is determined that the bread was in the state (normal temperature bread) (step S9), and if it is not above, it is determined that the initial state of the bread was the frozen state (frozen bread) (step S10).

The purpose of this determination is that it is necessary to change the cooking time depending on whether the bread is in the normal temperature state or in the frozen state. The idea of this determination method is based on Japanese Patent Application No. 3-0 filed by the present applicant.
No. 96470. When this is outlined, basically, when the bread is in a frozen state, the water is condensed, so that the generation of gas is delayed as compared with the case where the bread is in a room temperature state. Is detected, it is possible to know whether the bread is frozen or at room temperature.

After that, at the 120th second from the start of cooking, that is, at the time when the gas output value greatly differs between the case of one bread and the case of two breads, as can be seen from FIG. 5, the gas sensor. Output value of 15 (This is C
Read) (step S11), and the output value C
Then, the number of bread and the cooking time are determined from the weight detection value W and the initial state of the bread. This determination is made based on the determination data shown in Table 1 (step S12).

[0018]

[Table 1]

The way to read Table 1 is as follows.
When the bread is at room temperature, the judgment reference value is
The output value of the gas sensor 15 includes “0.84 or more” rank, “0.84 to 0.82 or more” rank, and “0.82 or less” rank, and when the bread is in a frozen state, As the determination reference value, the output value of the gas sensor 15 is “more than 0.92” rank and “0.92 to 0.90”.
There is a "super" rank and a "0.90 or less" rank. And, as the weight rank, "70 g or less" rank, "7
Over 0g ~ 105g or less "rank," Over 105g ~ 140g
There are “g or less” rank and “more than 140 g” rank.

Therefore, the gas amount detection value C and the important detection value W
And the initial state of the bread, it is determined whether the bread is "one", "two" or "intermediate". The determination results "1" and "2" are reliable determination results without a determination error, but "intermediate" is a region where an error due to the thickness of the bread is expected to some extent, and may be one. There may be two.

Thereafter, when 120 seconds have elapsed from the start of cooking, the blower 18 is stopped (step S13), and the cooking time is determined according to the above determination result (step S).
14). As shown in brackets in Table 1 above, the cooking time is "4 minutes and 40 seconds" in the case of "1 plate", "4 minutes 50 seconds" in the case of "intermediate", and "4 minutes and 50 seconds" in the case of "2 plates". 5 minutes 00 seconds "
Will be confirmed.

After that, the heaters 10 and 11 are controlled (step S15), and when the confirmed cooking time has expired (determined in step S16), the heaters 10 and 11 are turned off (step S17) to perform cooking. To finish.

According to the present embodiment as described above, the cooking time is controlled according to the weight detection result by the weight sensor 9 and the gas amount detection result by the gas sensor 15 after a fixed time has elapsed from the start of cooking, so that the heating target is not heated. The number of breads to be cooked can be determined in consideration of the thickness, and the cooking time can be optimally determined. Therefore, the food to be heated is neither overbaked nor underbaked. Moreover, since the number of breads can be automatically determined, a dedicated switch for setting the number of breads is not required.

[0024]

As is apparent from the above description, the present invention provides a heating means for heating the food to be heated contained in the cooking chamber, a weight sensor for detecting the weight of the food to be heated, and the cooking chamber. A gas sensor for detecting the amount of gas generated in the, and a control means for controlling the cooking time according to the weight detection result by the weight sensor and the gas amount detection result by the gas sensor after a fixed time from the start of cooking. With this, it is possible to optimally determine the cooking time according to the number and thickness of the cooked food, and prevent overcooking and undercooking of the cooked food,
Moreover, there is an excellent effect that the number of cooked foods can be automatically determined and a dedicated switch for setting the number of cooked foods is not required.

[Brief description of drawings]

FIG. 1 is a block diagram of an electrical configuration showing an embodiment of the present invention.

FIG. 2 is a perspective view of a microwave oven.

[Figure 3] Longitudinal section rear view

FIG. 4 is a flowchart showing control contents.

FIG. 5 is a diagram showing changes in gas generation amount.

[Explanation of symbols]

3 is a cooking chamber, 9 is a weight sensor, 10 is a lower heater (heating means), 11 is an upper heater (heating means), 14 is a magnetron, 15 is a gas sensor, 16 is a fan motor, 18 is a blower, and 19 is an operation control circuit. (Control means) is shown.

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[Procedure amendment]

[Submission date] August 29, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0015

[Correction method] Change

[Correction content]

When 60 seconds have passed from the start of cooking, the blower 18 is operated (step S6), and when 67 seconds have passed thereafter, the output value of the gas sensor 15 (this is referred to as A) is read (step S7). Then, it is judged whether or not the rate of change Gh (Gh = 1− (A / Vmax)) of the gas generation amount is a reference value or more in this case 0.07 (step S
8) If it is above, it is determined that the initial state of the loaf of bread is the normal temperature state (normal temperature bread) (step S9), and if not above, the initial state of the loaf of bread is frozen state (frozen bread).
Is determined (step S10).

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0018

[Correction method] Change

[Correction content]

[0018]

[Table 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

Claim: What is claimed is: 1. A heating means for heating a food to be heated contained in a cooking chamber, a weight sensor for detecting the weight of the food to be heated, and an amount of gas generated in the cooking chamber. A heating cooker comprising: a gas sensor for detecting the temperature; and a control means for controlling the cooking time according to the weight detection result by the weight sensor and the gas amount detection result by the gas sensor after a fixed time has elapsed from the start of cooking.