JPH0972551A - Cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To correctly detect the weight of a food in a heating chamber even after a bread is automatically toasted and hence make optimum a baked state of the food by setting a procedure of automatically toasting the bread, and inhibiting correction after the foregoing procedure is executed and controlling heating cooking based upon the weight of the food before the correction. SOLUTION: The weight of a food (bread, a food after bread is toasted, for example, fish) detected by a weight sensor 4 is corrected based upon temperature detected by a temperature sensor 8 in order to correct any error due to a temperature characteristic of the weight sensor 4, and heating cooking to the food is controlled on the basis of the weight after the correction. In this case, a procedure of automatically toasting bread with an auto-toast-key 10 is set, and after the procedure is executed, the correction is inhibited and the heating cooking is controlled on the basis of the weight of the food before the correction detected by the weight sensor 4. Accordingly, even after bread is automatically toasted, the weight of a food in the heating chamber 11 can be correctly detected and hence an optimum baked state of the food is ensured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a cooking device such as an oven range and an electric oven that controls heating and cooking of food based on the detected weight of the food.

[0002]

2. Description of the Related Art In a conventional microwave oven, selection settings of operation keys for setting a course of heating and cooking such as automatic toasting of bread and automatic roasting of fish, and weight of bread and fish in a heating chamber measured by a weight sensor Therefore, the cooking time is set, and the heating control of the heater is performed for the set time, whereby the desired heating and cooking is performed.
The weight sensor, which is disclosed in Japanese Utility Model Laid-Open No. 61-44106, takes out a change in electrostatic capacitance due to a change in distance between two electrode plates as an output frequency of a CR oscillation circuit and converts it into a weight. It is used a lot.

However, in this weight sensor, as the ambient temperature rises, the output frequency drifts due to the temperature characteristics of the inverter IC used in the oscillation circuit and the displacement due to the temperature of the electrode plate. To do. This drift causes a detection error of the weight sensor, makes the set time for heating and cooking inaccurate, and causes a problem in the cooking result. Therefore, JP-A-61-272529 and JP-A-2-106618 propose and put into practical use a method of correcting the detection result of the weight sensor based on the temperature detected by the temperature sensor.

In this case, originally, a temperature sensor for directly detecting the temperature of the weight sensor is required, but in order to reduce the manufacturing cost, the temperature sensor in the heating chamber often serves as the temperature sensor.
Even in this case, when the weight sensor is used after cooking other than the automatic bread toast, since the room temperature and the temperature of the weight sensor have a certain correlation, the temperature after the correction as shown in FIG. The weight error is within a range of approximately ± 10 g, and a substantially correct correction result of the detected weight can be obtained.

[0005]

However, when the bread is automatically toasted, the temperature in the heating chamber is raised to a high temperature and the bread is baked in a short time (several minutes). The temperature of the weight sensor has not risen sufficiently. Therefore, if the bread is automatically toasted or other cooking is performed in this state, the detection result of the weight sensor, which is not so high in temperature, will be corrected at the temperature in the high temperature heating chamber. As shown, the weight error after correction is overcorrected to exceed -20 g, which causes a problem in the cooking result.

The present invention has been made in view of the above circumstances. In the first invention, a means for prohibiting the above correction is provided after the procedure for automatically toasting bread is executed. Accordingly, it is an object of the present invention to provide a cooker that can correctly detect the weight of food in a heating chamber even after the bread is automatically toasted, and that can obtain the optimum degree of baking of the food. In the second invention, when the temperature detected by the temperature sensor is lower than the predetermined temperature, the means for prohibiting the above-mentioned correction is provided so that the food can be cooked on the basis of the correct weight of the food in the heating chamber. It is an object of the present invention to provide a cooker capable of obtaining a burnt condition.

In the third aspect of the invention, the procedure for automatically toasting bread is often set continuously, and is often set again after the procedure for automatically toasting bread is executed. When the bread is continuously toasted by providing means for prohibiting the above correction, the weight of the bread in the heating chamber can be accurately detected,
It is an object of the present invention to provide a cooker capable of obtaining an optimum baking condition of bread.

[0008]

A cooker according to a first aspect of the present invention comprises a temperature sensor for detecting the temperature in the heating chamber and a weight sensor for detecting the weight of food in the heating chamber. In order to correct the error caused by the temperature characteristic of the food, the weight of the food detected by the weight sensor is corrected by the temperature detected by the temperature sensor, and the food is cooked based on the corrected weight. In the cooking device for controlling, the means for automatically setting the procedure for toasting bread and the means for setting the procedure and for prohibiting the correction after the procedure is executed, When the means prohibits the correction, the heating cooking is controlled based on the weight of the food before the correction detected by the weight sensor.

In this cooking device, after the procedure for automatically toasting bread is executed, the correction of the weight of the food detected by the weight sensor is prohibited in order to correct the error caused by the temperature characteristic of the weight sensor. To do. Therefore, in the cooking procedure set after executing the procedure for automatically toasting bread, the cooking of food is controlled based on the weight of the food before correction detected by the weight sensor. Therefore, even after performing the procedure to automatically toast the bread, the detection result of the weight sensor that is not so high at the temperature inside the heating chamber is not corrected even if the temperature inside the heating chamber is high. The food can be cooked by heating, and the optimum baking condition of the food can be obtained.

The cooker according to the second aspect of the invention is characterized by comprising means for inhibiting the correction when the temperature detected by the temperature sensor is lower than a predetermined temperature. In this cooker, the temperature in the heating chamber and the temperature of the weight sensor are not so far apart from each other.When the temperature in the heating chamber is lower than a predetermined temperature, the temperature of the weight sensor depends on the temperature in the heating chamber detected by the temperature sensor. It is not necessary to correct the error due to the characteristics, because it is unnecessary. Therefore, based on the correct weight of the food in the heating chamber, the food can be cooked and the optimum degree of baking can be obtained. Further, when the temperature in the heating chamber is lower than the predetermined temperature, it is caused by the temperature characteristic of the weight sensor depending on the temperature in the heating chamber in the cooking procedure set after executing the procedure for automatically toasting bread. Cancel the state that prohibits the correction to the error.

The cooker according to the third invention comprises a temperature sensor for detecting the temperature in the heating chamber and a weight sensor for detecting the weight of the food in the heating chamber, and corrects an error caused by the temperature characteristic of the weight sensor. In order to do so, the temperature detected by the temperature sensor is used to correct the weight of the food detected by the weight sensor, and based on the corrected weight, a cooker that controls the heating and cooking of the food is provided with bread. A means for automatically setting a procedure to be toasted and a means for prohibiting the correction when the means sets the procedure, and the weight sensor detects when the means prohibits the correction. It is characterized in that the heating and cooking according to the above procedure is controlled based on the weight of the food product before the correction.

In this cooking device, when the procedure for automatically toasting bread is set, which is often performed continuously, a weight sensor for correcting an error due to the temperature characteristic of the weight sensor is provided. The correction of the detected food weight is prohibited, and the cooking based on the weight of the food detected by the weight sensor before correction is automatically controlled according to the procedure for toasting the bread. Therefore, when continuously toasting bread, the detection result of the weight sensor that is not so high at the temperature inside the heating chamber at a high temperature is not corrected. You can toast and get the optimum degree of baking.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a front view showing a schematic configuration example of an embodiment of a microwave oven according to the present invention. In this microwave oven, a heater 7 is provided at the upper inside of the box-shaped heating chamber 1, an indoor temperature sensor 8 is provided at a position apart from the heater 7, and heaters 5 and 6 are provided at the lower inside. A pedestal (bread net) 3 is provided above the heaters 5 and 6, and a lower portion of the pedestal 3 is connected to a weight sensor 4 that detects the weight of food. The turntable 2 is provided above the cradle 3.

In FIG. 1, on the front side of the heating chamber 1, a transparent opening / closing door (not shown) through which the inside of the heating chamber 1 can be seen is provided. A control unit 12 is provided on the outer side surface of the heating chamber 1, and a front surface of the control unit 12 has operation units such as an automatic toast key 10 for setting a procedure for automatically toasting bread and operation keys for setting a procedure for grilling fish, Display 9, timer 13
It is an operation panel 11 provided with the like.

FIG. 2 shows the control unit 1 of this microwave oven.
2 is a block diagram showing a schematic configuration example centered on 2. FIG. The control unit 12 includes a heater control unit 23 that controls the heating of the heaters 5, 6, and 7, a weight sensor temperature correction unit 21 that corrects the temperature characteristics of the weight sensor 4 based on the temperature detected by the temperature sensor 8, and a timer 13. And a heater control unit 23, a temperature sensor 8, a weight sensor 4, and an MPU 20 to which the weight sensor temperature correction unit 21 is connected. In MPU20,
The weight sensor 4, the temperature sensor 8, the display unit 9, and the operation unit 22 including operation keys such as the auto toast key 10 are connected.

The operation of the microwave oven having such a structure will be described below. In the microwave oven having such a configuration, the heating time of the heaters 5, 6, and 7 is set based on the selection setting of the operation keys for setting the heating and cooking procedure such as the automatic toast key 10 and the weight measured by the weight sensor 4. The heater control unit 23 controls the heaters 5, 6, for the set time.
By performing the heating control of 7, desired heating and cooking is performed.

FIG. 3 is a flow chart showing the operation of the MPU 20. The operation keys of the MPU 20 are operated,
When the operation of the microwave oven is started, the toast flag indicating that the procedure for automatically toasting bread is set is reset (S1). Next, the operation keys are checked to check the type of procedure for heating and cooking (S2). When the procedure for automatically toasting bread is set by the auto toast key 10 (S3), the toast flag is set (S21). ). Next, the temperature sensor 8 detects the temperature T _{0 in the} heating chamber (S5), and the weight sensor 4 detects the weight W of the food in the heating chamber (S7).

Next, when the toast flag is set (S9), the procedure for automatically toasting bread is executed based on the weight W of the food (S23), and then the procedure for automatically toasting bread is first performed. The pre-toast flag indicating that the process has been performed is set (S25), and the process ends. When the toast flag is not set (S9), when the pre-toast flag is set (S11), an automatic cooking procedure other than the procedure of automatically toasting bread is executed based on the weight W of the food. After (S17), the pre-toast flag is reset (S19), and the process ends.

If the pre-toast flag is not set (S11) and the temperature T ₀ is, for example, 80 ° C. or lower (S
13) Based on the weight W of the food, an automatic cooking procedure other than the procedure of automatically toasting bread was executed (S1).
7) After that, the pre-toast flag is reset (S1
9), end the processing. If the pre-toast flag is not set (S11) and the temperature T ₀ exceeds 80 ° C. (S13), the weight sensor temperature correction unit 21 subtracts, for example, 20 g from the weight W of the food, and the weight sensor After correcting the detected weight of 4 (S15), based on the corrected weight (W-20g), an automatic cooking procedure other than the procedure of automatically toasting bread is executed (S17), and the pre-toast flag is set. The process is reset (S19), and the process ends.

Next, when the operation key is operated and the operation of the microwave oven is started, the MPU 20 resets the toast flag indicating that the procedure for automatically toasting bread is set (S1). Next, the operation keys are checked to check the type of procedure for heating and cooking (S2). When the procedure for automatically toasting bread is set by the auto toast key 10 (S3), the toast flag is set (S21). ). Next, the temperature sensor 8 detects the temperature T _{0 in the} heating chamber (S5), and the weight sensor 4 detects the weight W of the food in the heating chamber (S7).

Next, when the toast flag is set (S9), the procedure for automatically toasting bread is executed based on the weight W of the food (S23), and then the procedure for automatically toasting bread is first performed. The pre-toast flag indicating that the process has been performed is set (S25), and the process ends. When the toast flag is not set (S9), when the pre-toast flag is set (S11), an automatic cooking procedure other than the procedure of automatically toasting bread is executed based on the weight W of the food. After (S17), the pre-toast flag is reset (S19), and the process ends.

If the pre-toast flag is not set (S11) and the temperature T ₀ is, for example, 80 ° C. or less (S11)
13) Based on the weight W of the food, an automatic cooking procedure other than the procedure of automatically toasting bread was executed (S1).
7) After that, the pre-toast flag is reset (S1
9), end the processing. If the pre-toast flag is not set (S11) and the temperature T ₀ exceeds 80 ° C. (S13), the weight sensor temperature correction unit 21 subtracts, for example, 20 g from the weight W of the food, and the weight sensor After correcting the detected weight of 4 (S15), based on the corrected weight (W-20g), an automatic cooking procedure other than the procedure of automatically toasting bread is executed (S17), and the pre-toast flag is set. The process is reset (S19), and the process ends. After that, the MPU 20 repeats the same operation as described above.

[0023]

According to the cooker of the first aspect of the present invention, even after performing the procedure for automatically toasting bread, the optimum baking condition of the food is obtained based on the correct weight of the food in the heating chamber. Can be obtained.

According to the cooker of the second aspect of the present invention, when the temperature in the heating chamber is lower than the predetermined temperature, the correction due to the error due to the temperature characteristic of the weight sensor is not necessary and therefore is not performed.
Therefore, based on the correct weight of the food in the heating chamber, the food can be cooked and the optimum degree of baking can be obtained.

According to the cooker of the third invention, even when the bread is toasted continuously, the bread can be toasted based on the correct weight of the bread in the heating chamber, and the optimum baking condition can be obtained.

[Brief description of drawings]

FIG. 1 is a front view showing a schematic configuration example of an embodiment of a cooker according to the present invention.

FIG. 2 is a block diagram showing a schematic configuration example centering on a control unit of the cooking device according to the present invention.

FIG. 3 is a flowchart showing the operation of the MPU of the cooking device according to the present invention.

FIG. 4 is a characteristic diagram showing an example of a dynamic temperature characteristic of a weight sensor of a cooking device after automatic toasting.

FIG. 5 is a characteristic diagram showing an example of dynamic temperature characteristics of the weight sensor of the cooking device after heating and cooking other than automatic toast.

[Explanation of symbols]

 1 Heating Chamber 4 Weight Sensor 8 (Indoor) Temperature Sensor 10 Auto Toast Key 20 MPU 21 Weight Sensor Temperature Correction Section

Claims (3)

[Claims] 1. A temperature sensor for detecting a temperature in a heating chamber, and a weight sensor for detecting a weight of food in the heating chamber. The temperature sensor for correcting an error caused by a temperature characteristic of the weight sensor. A procedure for automatically toasting bread in a cooker that corrects the weight of the food detected by the weight sensor based on the temperature detected by the controller and controls heating of the food based on the corrected weight. Means for setting
After the means sets the procedure and the procedure is executed, the means includes means for prohibiting the correction, and when the means prohibits the correction, the weight sensor detects the food before the correction. A cooker characterized by being designed to control cooking based on weight. 2. The cooker according to claim 1, further comprising means for prohibiting the correction when the temperature detected by the temperature sensor is lower than a predetermined temperature. 3. A temperature sensor for detecting the temperature in the heating chamber, and a weight sensor for detecting the weight of food in the heating chamber. The temperature sensor for correcting an error caused by the temperature characteristic of the weight sensor. A procedure for automatically toasting bread in a cooker that corrects the weight of the food detected by the weight sensor based on the temperature detected by the controller and controls heating of the food based on the corrected weight. Means for setting
And a means for prohibiting the correction when the means sets the procedure, and when the means prohibits the correction, the procedure based on the uncorrected weight of the food detected by the weight sensor. A cooker characterized by being designed to control heating cooking by.