JPH0552335A - Heating and cooking device - Google Patents

Abstract

PURPOSE:To prevent the adjusted temperature from being greatly different from its desired temperature. CONSTITUTION:A signal processing part 6 automatically adjusts a heating state of a burner 1 to its predetermined state after controlling the opening or closing of a solenoid valve 4 through a driving part 7 according to the mode set by a mode setting part 8 and the output from a temperature sensor 5. The burner 1 is controlled by the signal processing part 6 in such a way that the heating temperature is set within a temperature range set above or below the specified heating temperature. The signal processing part 6 measures the time required for changing the temperature in a specified temperature range below the temperature adjusting region. The difference between a reference value of a time required for a temperature variation in the specified temperature region under a reference combustion state in the burner 1 and the counted time is got. The adjusted temperature region for controlling a combustion state of the burner 1 is corrected according to this difference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a function of automatically adjusting a heating state according to various modes such as boiling, frying and baking cooked foods, and a function of automatically stopping the heating state in a specific situation. The present invention relates to a heating cooker having a function of keeping a temperature for heating a cooked product substantially constant.

[0002]

2. Description of the Related Art As a heating cooker such as a gas table stove, combustion control of a heating means such as a burner (small fire, depending on the cooking method such as boiling, frying (including frying with oil), or baking) There is a system in which the heating temperature of the cooked food can be automatically adjusted by switching the large fire. Further, the heating temperature of the food to be cooked is generally adopted by analogy with the output of a temperature sensor that detects the temperature by contacting the bottom of a container such as a pot in which the food is heated.

In this type of heating cooker, for example, if the cooking device is set to a mode for boiling food (hereinafter, this mode is referred to as a cooking mode), the temperature detected by the temperature sensor becomes the temperature at which it is determined to be charring. When it becomes low, you can automatically extinguish the burner to prevent the food from burning. In addition, if you set the mode for frying or frying the cooked food (hereinafter, this mode is referred to as oil mode), when the oil temperature is kept constant or the oil temperature becomes abnormally high. The fire can be extinguished automatically.

Further, if the cooking mode is set to the baking mode, automatic fire extinguishing can be performed when the heating temperature rises abnormally.

[0005]

By the way, in this type of heating cooker such as a gas table stove, the mode setting means is provided with a temperature setting section for setting the temperature of oil in the oil mode, and the temperature is detected by the temperature sensor. Until the temperature reaches a predetermined temperature (hereinafter, this temperature is called the small fire point), the heating power is set to a large fire, and when it reaches the above small fire point, the heating power is set to a small fire, and it is lower than the above small fire point. When the temperature detected by the temperature sensor has dropped to a specified temperature (hereinafter, this temperature is called the large fire point), the operation of setting the heating power to a large fire is repeated to keep the oil temperature almost at the set temperature. There is. This temperature adjustment operation is shown in FIG.
Shown in. In addition, the small fire point and the large fire point are
It was set based on the case where a standard amount of oil was heated in a constant state using a standard pan. However, when the small fire point and the large fire point (hereinafter, both are collectively referred to as a temperature control point) are fixedly set as described above, the type of the pot is the pot that serves as the above standard. However, if the amount of oil is significantly different from the reference amount, there is a problem that the temperature adjustment point in the reference state and the actual temperature adjustment point are significantly deviated, and the fried food cannot be finished beautifully.

For example, when the amount of oil is small, a so-called overshoot occurs in which the oil temperature becomes considerably higher than the set oil temperature in the initial stage of starting the temperature control by the small fire and the large fire. In this case, the fried food will burn badly. On the other hand, when the amount of oil is large, the temperature of the oil is low at the initial stage of starting the temperature control, and the oil cannot be fried cleanly. It should be noted that such a state may occur not only in the initial stage where the temperature control is started but also after that.

Further, when cooking food with this type of cooking device, a radiant material such as a grill may be used.
In this case, the temperature of the grill or the like becomes abnormally high, and there is a possibility that the temperature limit of the temperature sensor such as the thermistor may be exceeded. Therefore, in the heating cooker of this type, in the baking mode, the burner is controlled to a small fire and a large fire to limit the upper limit heating temperature to prevent the temperature sensor such as a thermistor from exceeding the heat resistant temperature.

Also in this case, the temperature control point may be displaced due to the difference in the thermal conductivity and structure of the radiant material such as the grill, and the temperature limit of the temperature sensor such as the thermistor may be exceeded. The present invention has been made in view of the above points, and an object of the present invention is to provide a heating cooker in which the adjusted temperature in the case of adjusting the temperature does not largely deviate from the desired temperature.

[0009]

In the present invention, in order to achieve the above object, a heating means for heating a cooking product and a temperature for detecting the temperature by contacting the bottom of a container in which the cooking product is heated are heated. Temperature detecting means such as a sensor, mode setting means for setting various modes such as cooking, frying, and baking food, and heating of the heating means according to the mode set by the mode setting means and the output of the temperature detecting means. With a heating control means that automatically adjusts the state to a predetermined state and automatically stops the heating state in a specific situation, so that the heating temperature is kept within a temperature range set above and below the specific heating temperature. In a heating cooker having a temperature adjusting function for controlling the heating state of the heating means by the heating control means so as to control the heating temperature for cooking to a substantially constant state, the temperature in a constant temperature region below the temperature adjustment region is maintained. The difference between the time measuring means for measuring the time required for the change and the time measured by the time measuring means is determined with the time required for the temperature change in the constant temperature region in the reference heating state of the heating means as a reference value, and the difference is determined according to this difference. The heating control means is provided with a correction means for correcting the adjusted temperature region for controlling the heating state of the heating means.

The mode setting means is provided with a temperature setting section for setting the temperature of the oil when the cooking mode is set to the frying oil mode, and the temperature is set above and below the oil temperature set by the temperature setting section. In a heating cooker equipped with a temperature adjusting function in which the heating control means controls the heating state of the heating means so as to keep the heating temperature within a predetermined temperature range and controls the oil temperature to a substantially set temperature, the type of the container and the oil In order to be able to finish the fried food nicely without being affected by the amount of oil, etc., a time measuring means for measuring the time required for the temperature change in the constant temperature region below the minimum set temperature in the oil fried food mode. , When a reference amount of oil is heated using a reference container, the time required for the temperature change in the constant temperature range is used as a reference value, and the difference from the time measured by the time measuring means is calculated. A correction means for correcting the adjusting temperature range for controlling the heating state of the heating means may be provided to the heating control means.

In addition, when the cooking mode for baking the cooked food is set, the heating control means controls the heating state of the heating means so as to keep the heating temperature within the temperature range, and the upper limit heating temperature for heating the cooked food is set. To prevent the heating state of the heating means from exceeding the upper temperature limit of the temperature sensor consisting of a thermistor, etc., when performing heating using a radiant object such as a grill in a heating cooker with a temperature control function to limit Is a time measuring means for measuring the time required for the temperature change in the constant temperature area below the control temperature area, and the time required for the temperature change in the constant temperature area in the reference heating state of the heating means as a reference value to be measured by the time measuring means. The difference with the time
The heating control means may be provided with a correction means for correcting the adjusted temperature region for controlling the heating state of the heating means according to the difference.

[0012]

According to the present invention, as described above, the time required to change the temperature in the constant temperature region below the temperature control region and the time required to change the temperature in the constant temperature region in the reference heating state of the heating unit are set. As a reference value, the difference between the time measured by the time measuring means and the time measured is obtained, and the heating control means is provided with a correcting means for correcting the adjusted temperature region for controlling the heating state of the heating means in accordance with the difference, so that the actual heating The adjustment temperature range is corrected according to the difference between the situation and the heating situation assumed as the reference so that a predetermined adjustment temperature can be obtained and the adjustment temperature does not deviate significantly from the desired temperature. is there.

[0013]

FIG. 1 shows an example of a heating cooker to which the present invention is applied. This heating cooker is a gas table stove, and the gas supplied through a solenoid valve (or a proportional control valve) 4 is burned by a burner 1 as a heating means, and a container (hereinafter referred to as a pan) containing a food 3 is burned. A case will be described) 2 is heated and cooked. Although not shown in FIG. 1, an ignition knob for performing ignition, fire extinguishing, and heat power adjustment is provided, and the heat power can be manually adjusted.

In the case of this heating cooker, the degree of heating can be automatically adjusted according to the cooking such as boiling, frying (including frying with oil) or baking, and the above cooking mode, oil mode and baking mode can be used. The mode setting unit 8 performs various kinds of mode setting. The mode setting section 8 includes a setting section for setting a temperature setting, a heating time, etc., in addition to a mode selection switch for switching the mode.
Further, it is integrally provided with a display section for displaying the set value or the current value and the mode in which the operation is performed.

Combustion control of the burner 1 according to these modes is performed by a signal processing unit 6 composed of a microcomputer. The signal processing unit 6 stores a processing program according to each mode, and the driving unit 7 according to the temperature of the cooked food 3 is stored.
The open state of the solenoid valve 4 is controlled via the to control the combustion state of the burner 1. That is, in the case of the present embodiment, the signal processing section 6, the driving section 7 and the solenoid valve 4 constitute a heating control means.

By the way, in this kind of heating cooker, the temperature of the cooked food 3 cannot be directly detected,
A temperature sensor 5 such as a thermistor serving as a temperature detecting means that comes into contact with the bottom of the pan 2 is used to adopt a method of analogizing the temperature of the cooked food 3. The cooking mode of the heating cooker according to the present invention will be described below. First, in the boiled food mode,
When the temperature detected by the temperature sensor 5 reaches a temperature at which it is determined that it is charring, the solenoid valve 4 is closed to automatically extinguish the burner 1 to prevent charring. At this time, at the same time, the user is informed of the burning by a notification means such as a buzzer. In this boiling mode, the user can set the boiling time, and when the time is set in this way, the fire is extinguished automatically after the set time has elapsed. However, even before the elapse of the set time, when the burning is detected, the fire is extinguished automatically.

Next, in the oil mode, the combustion amount (heat power) of the burner 1 is automatically adjusted to the upper limit temperature when frying or frying below the temperature at which the oil ignites. The upper limit temperature can be set to a desired temperature by the user according to cooking. Also in this oil mode, even when frying or stir-frying, if the temperature rises to an abnormal value due to some factor, automatic fire extinguishing is performed.

In the burning mode, the combustion amount (thermal power) of the burner 1 is automatically adjusted to the upper limit temperature. However, the upper limit temperature in the grilling mode is adjusted to be higher than that in the oil burning mode. Also at this time, if the temperature rises above the upper limit temperature, the fire is automatically extinguished. Furthermore, this heating cooker has a boiling water mode that is convenient for boiling water, detects the boiling state of the hot water from the output of the temperature sensor 5, notifies it with a buzzer, etc., and automatically extinguishes the fire. Have. The boiling state of the hot water can be detected because the temperature of the water becomes almost constant when it is boiled and the output of the temperature sensor also becomes almost constant.

By the way, as a function common to all of the above-mentioned modes, a timer for preventing the extinction of the ignition is operated at the same time as the ignition, and a function of automatically extinguishing the fire is provided when the time set by the timer or more elapses. .. The features of the present embodiment will be described below. In the heating cooker having the temperature adjusting function for controlling the heating temperature of the cooked food 3 to a substantially constant state as in the present embodiment, a signal is issued to keep the heating temperature within a temperature range set above and below the specific heating temperature. The processing unit 6 controls the combustion state of the burner 1.

However, if the adjustment temperature range is fixed as in the conventional case, the adjustment temperature largely deviates from the desired temperature.
Therefore, in this embodiment, in order to improve the above points, the signal processing unit 6 has the following configuration. That is, as shown in FIG. 2, an A / D converter 61 for converting the output of the temperature sensor 5 into digital data, and a temperature change in a constant temperature region below the temperature adjustment region by monitoring the temperature detected by the temperature sensor 5. The time measuring unit 62 that measures the time required for the measurement, the reference data storage unit 64 that stores the time required for the temperature change in the constant temperature region in the reference heating state of the burner 1 as the reference data, and the reference data and the time measuring unit 62. The correction unit 63 that calculates the correction data from the difference between the corrected time, the correction data storage unit 65 that stores the correction data obtained by the correction unit 63, and the control unit 66 that controls the drive unit 7 according to the correction data. It consists of and. The correction unit 63 appropriately reads the reference data from the reference data storage unit 64 according to the setting of the mode setting unit 8 and performs the correction. Further, in the case of the present embodiment, the above-mentioned respective parts are configured as software, but they may be configured as hardware by a discrete circuit.

With this configuration, the adjusted temperature region can be corrected according to the difference between the actual heating condition and the heating condition assumed as the reference, and the adjusted temperature does not deviate largely from the desired temperature. Hereinafter, the operation of correcting the adjusted temperature region according to the difference between the actual heating condition and the heating condition assumed as the reference will be specifically described by taking the oil mode as an example.

In the case of the present embodiment, assuming that the oil temperature can be set at T _{3 to} T ₇ in the oil mode, T _{1 to} T can be set as a constant temperature region below the temperature control region.
It should be ₂ . In addition, the region T ₁ to be corrected is
T ₂ needs to be equal to or lower than the lowest set temperature T ₃ , and is preferably a temperature as close to the lowest set temperature T ₃ as possible. The reason is that if the temperature is too low, the temperature detected by the thermistor used as the temperature sensor 5 varies.

Then, in the standard heating state of the burner 1,
Constant temperature region T₁~ T₂Is the time required to change the temperature of
The quasi-data is set under the following conditions. In other words,
A 20-cm diameter iron tempura pan is used as a container
T when the amount is 1 liter ₁~ T₂Required for temperature changes at
Time t₁Is used as a reference value. The gas is currently one
Commonly used standard pressure natural gas (13A-0-
It is based on 2).

Now, assuming that the time required for the temperature change from T _{1 to} T ₂ when the desired amount of oil is heated in the desired pan is t ₂ as the result of measuring the time by the time measuring unit 62, the reference value is obtained. the difference is the t ₂ -t ₂ = t ₃ of. The difference in t ₃ is converted into the amount of heat applied to the oil to obtain the corrected temperature in the correction unit 63,
Correct the temperature control points (small fire point and large fire point). The control unit 66 compares the correction temperature stored in the correction data storage unit 65 as the temperature adjustment point with the temperature detected by the temperature sensor 5 to switch the burner 1 between a small fire and a large fire. In this way, the temperature of the oil can be kept substantially constant without being affected by the type of the container 2 and the amount of the oil, so that the deep-fried food can be finished neatly. A flowchart summarizing the above operation is shown in FIG.

In the above case, the large fire point is also corrected.
I explained about the case of doing, but especially in the oil mode
Temperature setting in the initial case and actual temperature
A small fire point to reduce the deviation from the oil temperature
You may make it correct | amend only. By the way, the above
T when heating the desired amount of oil in the pan₁~ T
₂1 second difference between the time required for temperature change and standard data
Alternatively, the correction data may be corrected by 1.degree.
This is the difference between the time measured by the timer 62 and the reference data.
Is converted to the amount of heat applied to the oil for correction, and
It is confirmed that the results are not so different. Servant
When simplifying the processing program of the signal processing unit 6,
For this, the above method may be adopted. In this case, small fire
When correcting only the points, the time counting unit 62 measures the time.
The difference between the time taken and the reference data is t₃And the oil temperature is T
_FiveAn example is a small fire point in the standard state when setting to
Speaking of T _FiveIf so, at this time a small fire point
T_Five+ T₃It should be corrected to (℃).

Further, the correction value may be initialized when the ignition knob is turned off (extinguishing) or when the temperature detected by the temperature sensor 5 falls below T ₁ . It should be noted that if the temperature adjustment points are performed endlessly, the display temperature of the display unit may be lower than the set temperature. Therefore, it is preferable to set the upper and lower limits of correction in order to prevent this.

Further, it is preferable to perform temperature correction of the display unit for displaying the temperature of oil provided in the mode setting unit 8 using the above correction data, because the display value can be corrected. In this case, the display width of the set temperature changes. In the case of the heating cooker, in order to limit the upper limit heating temperature in the baking mode, the combustion state of the burner 1 is switched between small fire and large fire so that the heating temperature is kept within a temperature range including the upper limit heating temperature. Therefore, it is possible to prevent the upper limit heating temperature from exceeding the upper temperature limit of the temperature sensor, as in the case of the oil mode. That is, the time measuring means for measuring the time required for the temperature change in the constant temperature area below the adjustment temperature area and the time necessary for the temperature change in the constant temperature area in the reference heating state of the burner 1 as the reference value are measured by the time measuring means. The signal processing unit 6 may be provided with a correction unit that calculates a difference from the time taken and corrects the adjusted temperature region that controls the heating state of the heating unit according to the difference. By so doing, the upper limit heating temperature does not greatly deviate from the desired temperature even in the baking mode, and therefore, when the baking is performed using a radiant material such as a grill, the heating state of the heating means is changed from the thermistor or the like. It is possible to prevent the temperature sensor 5 from exceeding the heat resistant temperature. It should be noted that the user can select whether or not to perform the temperature adjustment in the high temperature range in the above case.

In the above case, the case of the gas table stove has been described, but it goes without saying that the invention can also be applied to the case of an electric stove.

[0029]

As described above, the present invention includes a heating means for heating a cooked food, and a temperature detecting means such as a temperature sensor for detecting the temperature by contacting the bottom of a container in which the cooked food is heated. A mode setting means for setting various modes such as simmering, frying, and baking cooked food, and the heating state of the heating means is automatically set to a predetermined state according to the mode set by this mode setting means and the output of the temperature detecting means. Adjust to
The heating control means for automatically stopping the heating state in a specific situation is provided, and the heating control means controls the heating state of the heating means so as to keep the heating temperature within a temperature range set above and below the specific heating temperature. In a heating cooker having a temperature adjusting function for controlling the heating temperature to the cooked product in a substantially constant state,
Time measuring means for measuring the time required for the temperature change in the constant temperature area below the temperature control area, and the time required for the temperature change in the constant temperature area in the reference heating state of the heating means as a reference value, and the time was measured by the time measuring means. The heating control means is provided with a correcting means for correcting the adjusted temperature region for controlling the heating state of the heating means according to the difference from the time, so that the actual heating situation and the heating assumed as the reference The control temperature range can be corrected according to the difference with the situation, so that the control temperature does not deviate significantly from the desired temperature.

Further, the mode setting means is provided with a temperature setting section for setting the temperature of the oil when the cooking oil is set in the oil-making mode, and the temperature is set above and below the oil temperature set by the temperature setting section. In the heating cooker equipped with a temperature adjustment function in which the heating control means controls the heating state of the heating means to control the heating temperature of the heating means so as to keep the heating temperature within the temperature range, As a reference value, the time required to change the temperature in the constant temperature region below the set temperature and the time required to change the temperature in the constant temperature region when a reference amount of oil is heated using a reference container When the difference between the time measured by the time measuring means and the time measured by the time measuring means is obtained, and the heating control means is provided with a correcting means for correcting the adjusted temperature region for controlling the heating state of the heating means, the type of container Such as without being affected by the amount of oil,
The set temperature can be kept almost constant, so that the fried food can be finished neatly.

In addition, when the cooking mode for baking the food is set, the heating control means controls the heating state of the heating means so as to keep the heating temperature within the temperature range, and the upper limit heating temperature for heating the food is set. In a heating cooker having a temperature control function for limiting, a time measuring means for measuring a time required for temperature change in a constant temperature area below a control temperature area and a time required for temperature change in the constant temperature area in a reference heating state of the heating means. As a reference value, the difference from the time measured by the time measuring means is obtained, and if the correction means for correcting the adjusted temperature region for controlling the heating state of the heating means according to this difference is provided in the heating control means, the upper limit heating is performed. The temperature does not greatly deviate from the desired temperature, and therefore, when the radiant material such as a grill is used for baking, the heating state of the heating means is a thermistor or the like. It is possible to prevent exceeding the heat resistant temperature.

[Brief description of drawings]

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

FIG. 2 is a configuration diagram of a signal processing unit of the above.

FIG. 3 is a flowchart showing a main operation of the above.

FIG. 4 is an explanatory diagram of a temperature adjusting method of the above.

[Explanation of symbols]

 1 Burner 2 Pan 3 Cooked Product 4 Solenoid Valve 5 Temperature Sensor 6 Signal Processing Section 7 Drive Section 8 Mode Setting Section 62 Timekeeping Section 63 Correction Section 64 Reference Data Storage Section

Front page continued (72) Inventor Machiko Nagano 4-1-2, Hirano-cho, Chuo-ku, Osaka City Osaka Gas Co., Ltd. (72) In-house Masao Uehara 1-52, Minami-shi, Minato-ku, Osaka Harman Co., Ltd. (72) Inventor Yutaka Yoshida 1-52 Minami-shi Oka, Minato-ku, Osaka 1-52 Harman Co., Ltd. (72) Inventor Tomoko Tanaka 1-52 Minami-shi Oka, Minato-ku Osaka, Osaka (72) Inventor Eriko Aoki 1-152 Minami-shi Oka, Minato-ku, Osaka City Harman Co., Ltd.

Claims (3)

[Claims] 1. A heating means for heating a cooked food, a temperature detecting means such as a temperature sensor for detecting the temperature by putting the cooked food in contact with the bottom of a container to be heated, and cooking, frying, or baking the cooked food. Mode setting means for setting various modes such as, and the heating state of the heating means is automatically adjusted to a predetermined state in accordance with the mode set by the mode setting means and the output of the temperature detecting means. The heating control means for automatically stopping the heating state is provided, and the heating control means controls the heating state of the heating means so as to keep the heating temperature within a temperature range set above and below the specific heating temperature to the cooked food. In a heating cooker having a temperature adjusting function for controlling the heating temperature of the device to a substantially constant state, a time measuring means for measuring a time required for a temperature change in a constant temperature area below the temperature adjusting area and a reference of the heating means. Using the time required for the temperature change in the constant temperature range in the heating state as a reference value, the difference from the time measured by the time measuring means is obtained, and the adjusted temperature range for controlling the heating state of the heating means is corrected according to this difference. A heating cooker comprising a correction means provided in the heating control means. 2. The mode setting means is provided with a temperature setting unit for setting the temperature of the oil when the cooking oil is set in the oil-making mode, and is set above and below the temperature of the oil set by the temperature setting unit. In the heating cooker equipped with a temperature adjustment function in which the heating control means controls the heating state of the heating means to control the heating temperature of the heating means so as to keep the heating temperature within the temperature range, As a reference value, the time required to change the temperature in the constant temperature region below the set temperature and the time required to change the temperature in the constant temperature region when a reference amount of oil is heated using a reference container , Find the difference with the time measured by the time measuring means,
2. The heating cooker according to claim 1, wherein the heating control means is provided with a correcting means for correcting an adjusted temperature region for controlling the heating state of the heating means in accordance with the difference. 3. The heating control means controls the heating state of the heating means so as to keep the heating temperature within the temperature range when the cooking mode is set to bake the cooking food, and the upper limit heating temperature for heating the cooking food is set. In a heating cooker having a temperature control function for limiting, a time measuring means for measuring a time required for temperature change in a constant temperature area below a control temperature area and a time required for temperature change in the constant temperature area in a reference heating state of the heating means. As a reference value, a difference from the time measured by the time measuring means is obtained, and the heating control means is provided with a correcting means for correcting the adjusted temperature region for controlling the heating state of the heating means according to the difference. The cooking device according to claim 1, which is characterized in that.