JPH06307643A - Cooking device - Google Patents

Abstract

PURPOSE:To prevent an unsuitable heating power from being controlled by a heating controller by a method wherein the heating controller stops an operation of a heating source in the case that a detected temperature sensed by a temperature sensor keeps a value lower than a predetermined value during a predetermined period of time while the heating source is being operated. CONSTITUTION:In the case that a cooking container 12 having cooked items 11, stored therein is mounted above a heating source 13, an outer surface of an upper end plate of a thermo-sensitive cylinder 21 of a temperature sensor 2 is resiliently contacted with a bottom outer surface 121 of the cooking container 12. Since a thermistor is fixed to an inner surface of the upper end plate of the thermo-sensitive cylinder 21, the thermistor detects a temperature of the cooking container 12 through the thermo- sensitive cylinder 21. A heating controller 4 controls a heating power of the heating source 13 in response to the detected temperature. Temperature detected by the thermistor has a less increasing amount and is lower than a predetermined value. When the detected temperature keeps a value lower than the predetermined value for a period more than a predetermined time, the heating controller 4 stops an operation of the heating source 13. With such an arrangement as above, it is possible to prevent control of an unsuitable heating power caused by the heating controller 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking apparatus in which a heating source heats a cooking container on the basis of a temperature detected by a temperature sensor in contact with the outer surface of the bottom of the cooking container.

[0002]

2. Description of the Related Art A gas burner for heating a cooking container containing an object to be cooked and the temperature at which a thermistor is fixed by a fixing plate which is welded to the back side of the upper end plate by elastically contacting the bottom plate of the heat sensitive cylinder with the bottom plate of the cooking container. BACKGROUND ART A cooking device including a sensor and a heating controller that controls the heating power of a gas burner based on the temperature detected by a temperature sensor has been conventionally known.

[0003]

In the above-mentioned conventional cooking apparatus, the back side of the upper end plate of the heat-sensitive tube and the fixing plate are fixed due to vibration during transportation, depression of the heat-sensitive tube when installing the cooking container, heat reception from the gas burner, and the like. It is extremely rare that the thermistor will fall off due to the disengagement of the welding with or the removal from the fixed plate. If the thermistor drops off, the heat from the top plate of the heat-sensitive cylinder will not be conducted to the thermistor, so the detected temperature does not make sense, and the heating controller will heat the gas burner according to the cooking condition (temperature) of the food to be cooked. You lose control of your power.

An object of the present invention is to provide a cooking device having a heating controller for controlling the heating power of a heating source on the basis of the temperature detected by a temperature sensor in contact with the outer surface of the bottom of a cooking container. If the thermistor stuck to the inner surface of the top plate of the is dropped, the operation of the heating source is stopped to prevent inappropriate control of heating power by the heating controller,
It is to improve safety.

[0005]

In order to solve the above-mentioned problems, the present invention provides a heating source for heating a cooking container containing an object to be cooked, and an outer surface of an upper end plate of a heat-sensitive cylinder on an outer surface of the bottom of the cooking container. A cooking device comprising: a temperature sensor that is in contact with a mounted state and has a thermistor fixed to the inner surface of the upper end plate; and a heating controller that controls the heating power of the heating source based on the temperature detected by the temperature sensor. During the operation of the heating source, the heating controller stops the operation of the heating source when the detected temperature detected by the temperature sensor continues to be less than a predetermined value for a predetermined time.

[0006]

When the cooking container containing the food to be cooked is installed above the heating source, the outer surface of the upper end plate of the heat-sensitive cylinder of the temperature sensor is in contact with the outer surface of the bottom of the cooking container in an elastic state. The cooking container receives heat from the heating source to raise its temperature, and the food to be cooked is heated. Since the outer surface of the upper end plate of the heat-sensitive tube is in elastic contact with the outer surface of the bottom of the cooking container, and the thermistor is fixed to the inner surface of the upper plate of the heat-sensitive tube, the thermistor keeps the temperature of the cooking container through the heat-sensitive tube. To detect. The heating controller controls the heating power of the heating source based on the detected temperature.

When the thermistor has fallen off, the outer surface of the upper end plate of the heat-sensitive tube is in contact with the outer surface of the bottom of the cooking container in the same manner as described above. Since it is not conducted to the thermistor, it cannot detect the temperature of the cooking vessel. Therefore, the detected temperature detected by the thermistor does not increase much and becomes less than the predetermined value. If the detected temperature continues for more than the specified time and less than the specified value, the heating controller stops the operation of the heating source.

[0008]

When the thermistor fixed to the inner surface of the upper end plate of the heat-sensitive cylinder falls off, the operation of the heating source is stopped, so that the object to be heated is burnt or has reached the set temperature. Nevertheless, it is possible to prevent inappropriate control of the heating power by the heating controller, such as the heating source continuing to heat the cooking container, and the cooking device is excellent in safety.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. As shown in the figure, the gas table A has a left stove 1 for heating a cooking container 12 containing an object 11 to be cooked such as tempura oil, a temperature sensor 2 having a thermistor 23 fixed in a heat sensitive tube 21, and a setting. An operation panel 3 for setting the temperature and selecting a cooking mode, and a control unit 4 for controlling the heating power of the left stove 1 based on the electric signal sent by the temperature sensor 2 and the setting signal sent by the operation panel 3. To have. The gas table A has a maximum H of 4100 kcal / h.
Right stove 5 with burner 51 and maximum 1950 kc
A grill 6 having an al / h multi-hole combustion plate type grill burner 61 is also provided.

The left stove 1 has a maximum M of 2300 kcal.
It has a burner 13 and is installed on the left side in the drawing. Also,
An ignition electrode 14 that performs an ignition discharge and a thermocouple 15 that generates an electromotive force by the combustion flame 10 are arranged facing the gas ejection flame port of the M burner 13. In addition, in FIG.
101 is a safety valve arranged in the gas pipeline 102,
103 is a main gas pipeline 104 branched from the gas pipeline 102
Further, among the auxiliary gas pipeline 105, a temperature control solenoid valve arranged in the main gas pipeline 104, and a main valve 106 arranged in the gas pipeline 102. The M burner 13 has a small fire when the temperature control solenoid valve 103 is in the closed state, and has a large fire when the temperature control solenoid valve 103 is in the opened state.

As shown in FIG. 3, the temperature sensor 2 includes a heat-sensitive cylinder 21 having a heat collecting plate 212 (Ni black plating) attached to an upper end opening 211a of a holder 211 (Ni black plating), and a heat collecting plate 212. Fixed plate 2 spot welded to the back surface 212b
2 and the back surface 2 of the heat collecting plate 212 filled with silicon grease
A thermistor 23 that is adhesively held between the swelling portion 22a provided on the fixed plate 22 and the swelling portion 22a; and a spring 25 (SUS631) that is arranged in the holder 211 and biases the heat collecting plate 212 and the holder 211 upward. , The lower frame 24 (SUS304) that receives the lower end of the spring 25 and is fixed to the shaft 26 (SUS304), and the thermistor 2
The lead wire 27 (N
i) and an insulation protection tube 28 for insulating the lead wire 27 from
(Polyimide) and the surface 21 of the heat collecting plate 212.
2a contacts the outer bottom surface 121 of the cooking container 12 in an elastic state.

The operation panel 3 has a "-" key 31 which lowers the set temperature by 10 ° C each time it is pressed, a "+" key 32 which raises the set temperature by 10 ° C each time it is pressed, and an operation mode such as cooked cooking or oil cooking. Cooking mode selection keys 33 to 35 for selecting
Seven-segment green LE that digitally displays the set temperature, etc.
D36 (triple) and the like are provided, and these are electrically connected to the control unit 4.

The right stove 5 is installed on the right side in the figure, and an ignition electrode 52 for performing an ignition discharge and a thermocouple 53 for generating an electromotive force by the combustion flame 50 are arranged facing the gas ejection flame port of the H burner 51. ing. Also, in FIG.
1 is a safety valve arranged in the gas line 502, 50
Reference numeral 3 is a main valve arranged in the gas pipeline 502. still,
The temperature sensor 2 having the same configuration as the left stove 1 is also arranged on the right stove 5.

On the multi-hole combustion plate of the grill burner 61 disposed in the center of the grill in the figure, an ignition electrode 62 for performing an ignition discharge and a thermocouple 63 for generating an electromotive force due to a combustion flame are arranged facing each other. . Incidentally, reference numerals 601 and 602 are a main valve and a safety valve arranged in the gas pipeline 603.

The control unit 4 is provided with a microcomputer, and controls the combustion force of the M burner 13 by opening and closing the temperature control solenoid valve 103 so that the detected temperature = the set control temperature in the frying mode, for example. . That is, until the detected temperature first reaches the set control temperature, the temperature adjusting solenoid valve 10
3 is opened to make the M burner 13 a large fire, and when it reaches, the temperature adjusting solenoid valve 103 is closed to make the M burner 13 a small fire, and when the detected temperature falls to the set control temperature -4 ° C, the temperature adjusting solenoid valve is opened. When the valve 103 is opened to make the M burner 13 a large fire and the detected temperature rises again to the set control temperature + 4 ° C, the temperature control solenoid valve 1
03 is closed and M burner 13 is set to low heat.

Further, the control unit 4 determines whether or not the thermistor 23 is fixed to the back surface 212b of the heat collecting plate 212 based on the flowchart shown below.

The operation of the control unit 4 will be described with reference to FIGS. 2, 5, and 6. The user presses the cooking mode selection key 34 for fried food whose temperature is adjusted at the set control temperature, and the "-" key 31 or "+" key 3 is pressed.
When 2 is pressed to set the set temperature to 180 ° C. and the point / fire extinguishing switch 16 is pressed to put the M burner 13 in the combustion state, the control unit 4 detects that the set temperature is the set control temperature (for example, set temperature + 5 ° C.). The thermal power of the M burner 13 is adjusted so that the above, and the falling of the thermistor 23 is detected.

In step s1, the microcomputer (not shown) of the control unit 4 causes the M burner 13
If it is burning (YE
S: elapsed time 700) proceeds to step s2. In step s2, N = 0 is executed, and the process proceeds to step s3. In step s3, it is determined whether or not the detected temperature <80 ° C., and if the detected temperature <80 ° C. {YES; curve 73 (already dropped before ignition) elapsed time 700, curve 72 (with elapsed time 701 (Deletion) elapsed time 702} is step s4
If the detected temperature ≧ 80 ° C. (NO), the process proceeds to step s9. In step s4, it is determined whether N = 1. If N ≠ 1 (NO), the process proceeds to step s5.
If N = 1 (YES), it is considered that the detected temperature <80 ° C. is continuing and the process proceeds to step s7. Step s5
Then, start a timer t having a time constant of 20 minutes,
Go to step s6. In step s6, N = 1 is executed, and the process proceeds to step s7. In step s7, it is determined whether or not the timer t has timed out, and if t ≧ 20 minutes (YES; elapsed time 704 of curve 73, curve 72)
705), the safety valve 101 is closed and the M burner 13 is extinguished. If t <20 minutes (NO), step s3
Return to. In step s9, the timer t is reset, and the process proceeds to step s10. At step s10, N = 0 is executed,
Return to step s3. The H burner 51 does not have a temperature control function, but has the temperature sensor 2 for performing automatic fire extinguishing or the like when burning, and performs the thermistor dropout detection similar to the above.

Next, advantages of the gas table A of this embodiment will be described. The back surface 212b of the heat collecting plate 212 is spotted due to vibrations and shocks that the gas table A receives during transportation, displacement of the heat-sensitive cylinder 21 when the cooking container 12 is placed on and removed from the Gotoku g, heat received from the burner, and the like. Fixed plate 22 to be welded
When the thermistor 23 comes off when the welding of is removed or the thermistor 23 comes off from the fixing plate 22, the elapsed time-detected temperature curve of the temperature sensor 2 detected by the control unit 4 is a curve 72 (at the elapsed time 701. Disengagement), as shown by curve 73 (already disengaged before ignition). When the thermistor 23 is removed, the temperature of the food 11 to be cooked such as tempura oil reaches a set temperature (for example, 180 ° C.),
Or even if charring occurs, M burner 13 or H burner 5
Since 1 maintains a large fire state or a burning state, the food to be cooked 11
And the temperature of the cooking container 12 continues to rise. But 2
If the detected temperature continues to be lower than 80 ° C. for 0 minutes, the control unit 4 considers that the thermistor 23 has fallen off and extinguishes the M burner 13 or the H burner 51 (curve 73).
704) and the elapsed time 705 of the curve 72), it is possible to suppress the oil from being heated to a temperature higher than the set temperature and the cooking object 11 from burning, and the safety is excellent.

The present invention includes the following embodiments in addition to the above embodiments. a. The food to be cooked 11 includes water, soy sauce, sake, in addition to tempura oil.
It may be miso, curry, soup, etc. b. The predetermined time and the predetermined value may be values other than 20 minutes and 80 ° C. c. The configuration of the present invention, in addition to the gas stove, electric stove,
It can also be applied to those using other heat source sources such as petroleum hobs.

[Brief description of drawings]

FIG. 1 is a perspective view of a gas table according to an embodiment of the present invention.

FIG. 2 is a structural explanatory view of the gas table.

FIG. 3 is a sectional view of a temperature sensor used for the gas table.

FIG. 4 is an explanatory diagram for explaining a fixed state of the temperature sensor.

FIG. 5 is a flowchart showing the operation of the control unit of the gas table.

[Fig. 6] Elapsed time when the thermistor falls off
-Is a graph showing the relationship with the detected temperature.

[Explanation of symbols]

 A gas table (cooking device) 2 temperature sensor 4 control unit (heating controller) 11 cooking target 12 cooking container 13 M burner (heating source) 21 heat sensitive tube 23 thermistor 51 H burner (heating source) 121 bottom outer surface 212 heat collection Plate (upper plate) 212a Front surface of heat collecting plate (outer surface) 212b Back surface of heat collecting plate (inner surface)

Continuation of front page (51) Int.Cl. ⁵ Identification number Office reference number FI technical display location F24C 7/04 301 A 7539-3L

Claims (1)

[Claims] 1. A heating source for heating a cooking container containing an object to be cooked, an outer surface of an upper end plate of a heat-sensitive cylinder is elastically contacted with an outer surface of a bottom of the cooking container, and a thermistor is provided on an inner surface of the upper end plate. A cooking device comprising: a fixed temperature sensor; and a heating controller that controls the heating power of the heating source based on the temperature detected by the temperature sensor, wherein the temperature is maintained for a predetermined time during operation of the heating source. The cooking device, wherein the heating controller stops the operation of the heating source when the detected temperature detected by the sensor continues to be lower than a predetermined value.