JPH08131344A - Heating and cooking device - Google Patents

Abstract

PURPOSE: To rapidly recover the lowered temperature of a material to be heated due to addition of a food material to a setting temperature. CONSTITUTION: A heating control means 10 makes a heating means 4 to heat under maximum power when the detected temperature of a temperature detecting means 6 is lowered by a prescribed temperature or more lower than a setting temperature because of the addition of a food material. Even after the detected temperature of the temperature detecting means 6 is returned to the setting temperature, the heating means 4 additionally carried out heating under the maximum power for a prescribed time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an induction cooker, a gas stove, a stove using a halogen heater, and the like, and more particularly to a heating cooker capable of cooking fried foods. The present invention relates to a heating cooker that can be recovered.

[0002]

2. Description of the Related Art Conventionally, this type of cooker heats oil contained in a pan to maintain the oil temperature at a predetermined set temperature, and puts foodstuffs in the oil to cook fried food. It can be carried out. In this cooking device, instead of directly detecting the oil temperature as the oil temperature, the temperature of the pan is detected. In the case of such fried food cooking, when the food material is put into the oil, the oil temperature is once lowered and then recovered after a while.

[0003]

However, the decrease in oil temperature due to the addition of food materials is greater than the decrease in pan temperature, and
Upon recovery, the pot temperature rises faster. For this reason,
The oil temperature rises later than the detected temperature of the pan temperature, and a phenomenon occurs in which the oil temperature has not yet reached the set temperature even if it is apparently restored to the set temperature by the detected temperature. When the foodstuffs are continuously added, this phenomenon is accumulated, and the oil temperature may be considerably lower than the set temperature. Due to such a phenomenon, the conventional cooker has a problem that the deep-fried food is not well fried. The present invention has been made in view of the above problems, and an object of the present invention is to provide a heating cooker capable of promptly recovering a decrease in an object to be heated due to introduction of foodstuffs to a set temperature.

[0004]

In order to achieve the above object, the first invention is a heating means for heating an object to be heated housed in a pan to a set temperature, and a temperature for detecting the temperature of the object to be heated. When the temperature detected by the temperature detecting means and the temperature detecting means drops to a predetermined temperature or more due to the input of the food,
Even after the temperature detected by the temperature detecting means is restored to the set temperature by causing the heating means to perform heating with maximum electric power,
And a heating control means for additionally heating the heating means with maximum electric power for a predetermined time (claim 1).

As a second aspect of the present invention, temperature change rate calculating means for calculating the change rate of the detected temperature while the temperature detected by the temperature detecting means is lowered or the detected temperature is recovered by the introduction of foodstuffs, An additional heating time setting means for setting an additional heating time by the maximum electric power after the temperature recovery may be further provided according to the magnitude of the temperature change rate by the temperature change rate calculating means (claim 2). Further, as a third invention, according to a time measuring means for measuring a time from a temperature drop time of the temperature detected by the temperature detecting means to a temperature recovery time, and a magnitude of the time by the time measuring means,
An additional heating time setting means for setting an additional heating time by the maximum power after temperature recovery may be further provided (claim 3).

[0006]

In the configuration of the first aspect of the invention, when the temperature of the object to be heated falls below the set temperature by a predetermined temperature due to the addition of the foodstuff, the heating is performed with the maximum electric power, and even after the detected temperature is restored to the set temperature, the maximum temperature is further increased. Heating is additionally performed for a predetermined time with electric power. As a result, the temperature of the object to be heated is restored to the set temperature. As described above, even if the detected temperature recovers to the set temperature, the temperature of the object to be heated has not yet recovered to the set temperature and there is a deviation from the set temperature.
This deviation is proportional to the temperature drop rate when the temperature drops when the food is charged, the temperature rise rate when the temperature is recovered, or the time from the temperature drop point to the temperature recovery point. According to the configurations of the second and third aspects, the additional heating time is set according to the temperature change rate and the time, so that the temperature of the object to be heated is recovered to the set temperature more accurately.

[0007]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 shows an electromagnetic cooker which is an embodiment of the heating cooker according to the present invention. The main body 1 of the cooker has a top plate 3 on which a pan 2 is placed. Body 1
An annular induction heating coil 4 is disposed inside the above so as to face the inner surface of the top plate 3. A ferrite plate 5 is arranged below the induction heating coil 4. A thermistor 6 as a temperature detecting means is attached to the center of the induction heating coil 4 and to the inner surface of the top plate 3.

Inside the main body 1, an inverter device 7 for applying a high frequency voltage to the induction heating coil 4 is further provided.
A control device 8 is provided. The control unit 8 is composed of a microcomputer, and based on the temperature detected by the thermistor 6, cooperates with the timer unit 9 to drive the inverter unit 7 to heat the pot 2, and the thermistor 6. Based on the detected temperature and the time measured by the timer means 9, the temperature change rate calculating means 11 calculates the temperature change rate of the detected temperature, and based on the time measured by the temperature change rate calculating means 11 or the timer means 9. And additional heating time setting means 12 for setting the additional heating time.

An operation display panel 13 as shown in FIG. 2 is provided outside the main body 1. The panel 13 has a heating key 14 for energizing to start cooking,
Off key 15 for turning off the power, boiling water key 16 for boiling water, fried food key 17 for setting a temperature suitable for deep-fried food and heating, time key 18a and minute key 18b for setting a cooking timer, timer Cancel key 18
c, up and down keys 19a, 1 for setting fire
9b, and a liquid crystal display panel 20 for displaying conditions and cooking conditions set based on the above key operations.

The operation of the control device 8 when fried food is cooked will be described below with reference to the flow chart of FIG.
When the pan 2 containing the oil is placed on the top plate 3 and the key 17 is pressed, first, as shown in FIG. 3, normal heating control is first performed to maintain the oil temperature at the set temperature Tc. . Then, the foodstuff is put in, and in step 102, the temperature TH detected by the thermistor 6 becomes 1 from the set temperature Tc.
It is determined whether or not the temperature has dropped by 0 ° C. or more. If the temperature has not dropped, the normal heating control in step 101 is performed, and if the temperature has dropped, heating is performed with the maximum power in step 103. This allows
The oil temperature and the detected temperature rise as shown in FIG.

Next, after waiting in step 104 until the detected temperature TH becomes equal to or higher than the set temperature Tc, in step 105, waiting for 1 minute, and then in step 10
The normal heating control of 1 is performed. Incidentally, the above-mentioned step 105
The waiting time in is not limited to 1 minute.
As a result, as shown in FIG. 6, even after the detected temperature TH recovers to the set temperature Tc, the heating is further continued at the maximum electric power, so that the oil temperature quickly recovers to the set temperature Tc.

FIG. 4 shows another embodiment of the present invention, in which the additional heating time ta is set according to the temperature change rate T _R after the food is added. In step 201, normal heating control is performed, and in step 202, it is determined whether or not there is a temperature drop due to food material input. If there is no temperature drop, the process returns to step 201 to continue normal heating control.
The temperature change rate T _R for 2 seconds is calculated. The temperature change rate T _R may be calculated between step 204 and step 205.

Then, in step 204, it is judged whether the detected temperature TH has dropped from the set temperature Tc by 10 ° C. or more,
If not dropped performs normal heating control returns to step 201, drop and when the temperature change rate T _R is equal to or more than 1 ℃ at step 205 if 1 minute additional heating time ta, the temperature change rate T _R Is less than 1 ° C., the additional heating time ta is set to 0.5 minutes, and heating is performed with the maximum power in step 208. As a result, the oil temperature rises. In addition,
The additional heating time ta is not limited to the above value.

Next, in step 209, after waiting until the detected temperature TH becomes equal to or higher than the set temperature Tc, further waiting in step 210 until the additional heating time ta minutes elapses, and then the normal heating control of step 201 is performed. To do. As a result, even after the detected temperature TH recovers to the set temperature, the heating is continued at the maximum electric power for additional ta minutes,
The oil temperature recovers to the set temperature Tc quickly and accurately.

In this embodiment, the temperature change rate T _R at the time of temperature drop after the food is put in is calculated and the additional heating time ta is set based on the calculated temperature change rate T _R. It is also possible to calculate the temperature change rate T _R ′ of and to set the additional heating time ta based on this.

FIG. 5 shows still another embodiment of the present invention,
Additional heating time ta depending on the temperature recovery time t after food is added
Is to be set. In step 301, normal heating control is performed, and in step 302, it is determined whether or not there is a temperature drop due to food material input. If not, the process returns to step 301 to continue normal heating control, and if there is a temperature drop, step 30
Start time measurement at 3.

Then, in step 304, it is judged whether or not the detected temperature TH has dropped from the set temperature Tc by 10 ° C. or more,
If it has not fallen, the time measurement is stopped in step 305 and then the process returns to step 301 to perform normal heating control,
If it has fallen, heating is performed with maximum power in step 306.
As a result, the oil temperature rises.

Next, in step 307, after waiting until the detected temperature TH becomes equal to or higher than the set temperature Tc, step 308
Then, the time measurement is completed and this time is set to t, and step 30
At 9, an additional heating time ta is set based on this time t. Then, in step 310, after waiting for the additional heating time ta, the normal heating control in step 301 is performed. As a result, even after the detected temperature TH has recovered to the set temperature, heating is continued for an additional ta minutes at maximum power, so that the oil temperature recovers to the set temperature Tc quickly and accurately.

[0019]

As is apparent from the above description, according to the first aspect of the invention, even if the temperature of the object to be heated is lowered by the addition of the foodstuff, the temperature is quickly restored to the set temperature. There is no such thing as fried food. According to the second invention, since the additional heating time is adjusted by the temperature change rate at the time of introducing the food material, the temperature of the object to be heated is surely recovered to the set temperature. Since the additional heating time is adjusted depending on the time from the time when the detected temperature falls to the time when the temperature recovers, the temperature of the object to be heated surely recovers to the set temperature.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a heating cooker according to the present invention.

FIG. 2 is a plan view of an operation display panel of the heating cooker shown in FIG.

FIG. 3 is a flowchart showing an operation during cooking of deep-fried food according to the first embodiment.

FIG. 4 is a flow chart showing an operation during fried food cooking according to the second embodiment.

FIG. 5 is a flowchart showing an operation during cooking of deep-fried food according to a third embodiment.

FIG. 6 is a graph showing changes in detected temperature and oil temperature and changes in electric power during fried food cooking.

[Explanation of symbols]

1 ... Cooker main body, 2 ... Pan, 4 ... Induction heating coil (heating means), 6 ... Thermistor (temperature detection means), 7 ... Inverter device, 8 ... Control device, 9 ... Timer device, 10 ... Heating control device, 11 ... Temperature change rate calculation means, 12 ... Additional heating time setting means.

Claims (3)

[Claims] 1. A heating means for heating an object to be heated housed in a pan to a set temperature, a temperature detecting means for detecting the temperature of the object to be heated, and a temperature detected by the temperature detecting means when food is introduced. When the temperature falls below a predetermined temperature, the heating means is caused to perform heating with the maximum power, and even after the temperature detected by the temperature detecting means is restored to the set temperature, heating with the maximum power is added to the heating means for a predetermined time. And a heating control means for controlling the heating. 2. A temperature change rate calculating means for calculating a change rate of the detected temperature while the temperature detected by the temperature detecting means is lowered or the detected temperature is recovered by the addition of food, and the temperature change rate calculating means. The heating cooker according to claim 1, further comprising: an additional heating time setting means for setting an additional heating time by maximum power after temperature recovery according to the magnitude of the temperature change rate. 3. A timer means for measuring the time from the time when the temperature of the temperature detected by the temperature detecting means falls to the time of temperature recovery, and additional heating with maximum power after temperature recovery according to the magnitude of the time by the timer means. The cooking device according to claim 1, further comprising additional heating time setting means for setting a time.