JPH04295512A - Device for cooking by heating with temperature sensor - Google Patents

Abstract

PURPOSE:To improve the easiness of use by preventing automatic fire extinguishing that is caused by the temperature cut mode during the shaking of a pan. CONSTITUTION:Until specified time passes after the temperature sensed by a temperature sensor 8 goes over high-cut temperature, namely by avoiding the high cut mode during a timer 10 incorporated in a computer 5 is operating, a gas valve 4 is made not to shut out a gas supply channel 3 to a gas burner 2 even if the temperature sensed by a temperature sensor 8 goes over the high cut temperature by means of swinging the pan.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat cooker equipped with a temperature sensor for sensing the temperature of a cooking pot.

0002

[Prior Art] Conventionally, in a heat cooker with a temperature sensor, the temperature of the cooking pot is sensed by bringing the temperature sensor into contact with the bottom of the cooking pot, and when the temperature detected by the temperature sensor rises above the cutting temperature. Some types have a temperature cut mode that closes the cutoff valve to cut off the fuel supply path and extinguish the fire to prevent burning and overheating of the cooking pot due to overheating.

0003

[Problems to be Solved by the Invention] However, in the conventional heat cooker equipped with a temperature sensor, when the combustion flame of the burner fluctuates due to the shaking of the cooking pot during cooking, which involves lifting the cooking pot and stirring the food, the temperature sensor There is a possibility that the detected temperature will rise rapidly above the cut temperature. In this case, even if the temperature of the cooking pot has not yet risen to the cut temperature, the temperature cut mode is activated, the shutoff valve closes, and the fire is automatically extinguished, making it inconvenient to use.

SUMMARY OF THE INVENTION An object of the present invention is to provide a temperature sensor-added heat cooker that is more convenient to use by preventing automatic extinguishing due to the temperature cut mode when the pot is being shaken.

[0005]

[Means for solving the problem] (Claim 1) The present invention comprises:
A heating means for heating a cooking pot by burning fuel, an opening/closing means interposed in a fuel supply path for supplying fuel to the heating means, and a temperature sensor for sensing the temperature of the cooking pot, the temperature sensor control means for performing a temperature cut mode in which the opening/closing means is controlled to cut off the fuel supply path when the temperature sensed by the temperature sensor rises above the cut temperature; The device has a timer that operates for a predetermined time after the temperature exceeds the cut temperature, and a technical means is adopted to avoid the temperature cut mode when the timer is activated.

(Claim 2) The control means employs technical means for immediately returning to the temperature cut mode when the temperature sensed by the temperature sensor falls below the cut temperature while the timer is operating.

(Claim 3) The present invention provides a heating means for heating a cooking pot by burning fuel, an opening/closing means interposed in a fuel supply path for supplying fuel to the heating means, and a temperature control means for controlling the temperature of the cooking pot. and control means for controlling the opening/closing means to perform a temperature cut mode in which the fuel supply path is cut off when the temperature sensed by the temperature sensor rises above the cut temperature. , the control means has a timer that operates for a predetermined time after the temperature sensed by the temperature sensor exceeds the cut temperature, and when the timer is operated, the temperature is cut to a temperature higher than the cut temperature. Adopted technological means of changing the temperature.

(Claim 4) A technique in which the control means immediately returns the temperature at which the temperature is cut to the original cut temperature when the temperature sensed by the temperature sensor falls below the cut temperature while the timer is operating. adopted the means.

[0009]

[Operation] (Claims 1 and 3) While the timer is operating, that is, within a predetermined time after the temperature sensed by the temperature sensor exceeds the cut temperature, the temperature cut mode is avoided or the temperature is set to a temperature higher than the cut temperature. Change the temperature at which cutting is performed. Therefore, even if the temperature sensed by the temperature sensor rises above the cut temperature, the fuel supply path will not be cut off for a predetermined period of time. Therefore, even if the temperature sensed by the temperature sensor exceeds the cut temperature due to shaking the pot, unnecessary automatic extinguishing is not performed, and the shaking of the pot can be performed within a predetermined time.

(Claims 2 and 4) While the timer is operating, that is, if the temperature sensed by the temperature sensor falls below the cut temperature within a predetermined time after the temperature sensed by the temperature sensor exceeds the cut temperature, the pan shaker is activated. It is determined that the machine is in normal use with the cooking pot stopped and a cooking pot placed on it, and the machine immediately returns to the temperature cut mode that allows automatic extinguishing at the original cutting temperature. Therefore, there is no need to separately provide a determination means for determining whether or not the shaking of the pot has been stopped, and in addition, an unnecessary temperature cut mode is avoided, or a state where the temperature at which the temperature cut is performed is changed to a higher temperature than the cut temperature. It eliminates the continuation of

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The heat cooking device with a temperature sensor according to the present invention will be explained based on the embodiments shown in FIGS. 1 to 5. Figures 1 to 4
1 is a diagram showing a first embodiment according to claims 1 and 2 of the present invention. FIG. 1 is a sectional view showing the main parts of a table stove with a temperature sensor, and FIG. 2 is a perspective view of the table stove with a temperature sensor.

The table stove 1 with a temperature sensor is a heat cooker with a temperature sensor according to the present invention, and includes a gas burner 2, a gas supply path 3, a gas valve 4, and a computer 5.

The gas burner 2 is a heating means of the present invention, and heats the cooking pot 6 by burning a mixture of fuel gas and combustion air. The gas supply path 3 is a fuel supply path of the present invention, and supplies fuel gas to the gas burner 2. The gas valve 4 is an opening/closing means of the present invention, and is interposed in the gas supply path 3 and is kept open while energized (on).
The valve closes when electricity is stopped (turned off).

The computer 5 is a control means of the present invention, and is an ignition/extinguishing button 7 that controls ignition and extinguishing of the gas burner 2.
, a temperature sensor 8 such as a thermistor that detects the temperature of the bottom surface of the cooking pot 6 by being brought into contact with the bottom surface of the cooking pot 6, selection of set and reset of the temperature cut mode, and multi-step cut temperature of the temperature cut mode ( It is connected to a setting device 9 that arbitrarily selects a high-cut temperature, a high-high cut temperature, and a low-cut temperature.

[0015] This computer 5 has a built-in timer 10. This timer 10 is activated for a predetermined period of time (for example, 10
This is a circuit that operates (for 2 seconds).

[0016] Furthermore, when the temperature cut mode is set, the computer 5 determines whether a predetermined period of time has passed since the temperature sensed by the temperature sensor 8 reaches the high cut temperature (for example, 250°C), as shown in the graph of FIG. (for example, for 10 seconds) to avoid temperature cut mode and continue combustion.

Furthermore, the computer 5 has a temperature sensor 8
The temperature cut mode is restored when a predetermined period of time (for example, 10 seconds) has elapsed since the sensed temperature of the temperature sensor 8 reached the high-cut temperature (for example, 250 degrees Celsius), and at that time, the temperature sensed by the temperature sensor 8 still reached the high-cut temperature (for example, 250 degrees Celsius). ), the gas valve 4 is closed to automatically extinguish the fire.

[0018] The computer 5 is in a low-cut mode (for example, the low-cut temperature is 130°C) or a high-high-cut mode (for example, the high-high cut temperature is 290°C).
Similar control is performed when set to .

FIG. 4 is a flowchart showing an example of the operation of the computer 5. First, it is determined whether the temperature cut mode is set (step S1). When the temperature cut mode is not set (No), control in step S1 is performed.

In step S1, when a temperature cut mode is selected and, for example, a high cut mode (cut temperature 250° C.) is set (Yes), the temperature sensed by the temperature sensor 8 rises above the high cut temperature. It is determined whether or not there is one (step S2). When the temperature has not risen above the high-cut temperature (No), control in step S1 is performed.

In step S2, when the temperature has risen above the high-cut temperature, that is, when the temperature sensed by the temperature sensor 8 exceeds the high-cut temperature (Yes), the timer 1
0 (step S3), and it is determined whether the temperature sensed by the temperature sensor 8 has fallen below the high cut temperature (step S4). When it is determined that the cooking pot 6 has fallen below the high-cut temperature, the shaking of the pot has been stopped, and the cooking pot 6 has been placed again (Yes), control in step S1 is performed.

In step S4, if the temperature has not decreased below the high-cut temperature (No), it is determined whether a predetermined time (for example, 10 seconds) has elapsed since the high-cut temperature was reached (step S5). If the predetermined time has not elapsed (No), control in step S4 is performed.

In step S5, if the predetermined time has elapsed (Yes), that is, if the pot has been shaken for more than the predetermined time, the high cut mode is activated and the gas valve 4 is closed to start combustion. It stops (step S6) and ends the control.

[0024] Also, when the low-cut mode or high-high cut mode is set, the low-cut temperature (for example, 130°C) and the high-high cut temperature (for example, 290°C) are set.
Performs similar control as .

The operation of this table stove 1 with a temperature sensor will be explained based on FIGS. 1 to 3. The gas valve 4 is opened by pressing the ignition/extinguishing button 7, and when ignition is performed by an ignition device (not shown), the gas burner 2 starts combustion. Further, a temperature cut mode is set by the setting device 9, and a cut temperature such as a high cut mode or a low cut mode is selected depending on the type of food to be cooked.

Explaining the case where the high-cut mode is selected, as the cooking pot 6 is heated by the gas burner 2, the high-cut temperature (for example, 250° C.) may be exceeded.

At this time, the timer 10 of the computer 5
starts operating. While the timer is running, computer 5
determines whether the temperature sensed by the temperature sensor 8 has fallen below the high-cut temperature, for example, every second.

While the timer 10 is operating, that is, within a predetermined period of time (for example, 10 seconds), even if it is determined that the temperature sensed by the temperature sensor 8 has risen above the high-cut temperature (for example, 250° C.), , temperature cut mode is avoided.

Therefore, even if the temperature of the cooking pot 6 has not yet risen to the high-cut temperature, the temperature sensed by the temperature sensor 8 will rise above the high-cut temperature. For example, it can be executed for only 10 seconds), which improves usability.

As shown by line A in FIG. 3, when the high-cut mode is avoided, the temperature sensed by the temperature sensor 8 drops below the high-cut temperature (for example, 250° C.) within a predetermined period of time (for example, 10 seconds). When this happens, it is determined that the cooking pot 6 has been placed again after the shaking of the pot is stopped, and the high cut mode is immediately returned to.

[0031] When the operation of the timer 10 is finished, that is, when a predetermined time (for example, 10 seconds) has elapsed,
If the high-cut mode returns and at this time, the temperature sensed by the temperature sensor 8 rises above the high-cut temperature (for example, 250 degrees Celsius), as shown by lines B and C in FIG. 3, high-cut control is performed immediately. The gas valve 4 is closed and the gas burner 2 is automatically extinguished. Therefore, overheating of the cooking pot 6 is prevented and safety is excellent.

[0032] Even when the low-cut mode is selected, the same control is performed with the low-cut temperature (for example, 130°C) being used, and the pot can be shaken for a predetermined period of time (for example, 10 seconds) while combustion continues. . Moreover, low cut control is set when preventing burning in water dishes.

FIG. 5 shows a second embodiment according to claims 3 and 4 of the present invention, and is a flowchart showing an example of the operation of the computer 5. Controls similar to those in the first embodiment are given the same numbers, and description thereof will be omitted.

When it is determined in step S2 that the temperature sensed by the temperature sensor 8 has risen above the high-cut temperature (Yes), the timer 10 is started (step S3).

In step S4, if the temperature has not decreased below the high-cut temperature (No), the temperature at which the temperature is cut is set to the avoidance cut temperature (which is higher than the high-cut temperature).
For example, 300° C.) (step S11). Then, it is determined whether the temperature sensed by the temperature sensor 8 has risen above the avoidance cut temperature (step S12). When the temperature has risen above the avoidance cut temperature (Yes), control in step S6 is performed.

In step S12, if the temperature has not risen above the avoidance cut temperature (No), it is determined whether a predetermined time has elapsed (step S13). When the predetermined time has elapsed (Yes), control in step S6 is performed.

In step S13, if the predetermined time has not elapsed (No), the temperature at which temperature cutting is performed is returned to the original high cut temperature (step S14), and step S4
control. Note that it is desirable to set the avoidance cut temperature to an extremely high temperature that cannot be reached even by shaking the pot.

(Modified example) The temperature cut mode may be a one-step cut only at a predetermined temperature (for example, 250°C), or it may be a type in which the presence or absence of the temperature cut mode cannot be selected, and the temperature cut mode always operates; A type that allows you to freely set the temperature to any desired temperature is also acceptable.

[0039] In the case of multiple-stage temperature cutting, the highest cutting temperature (for example, high-high cut temperature 290°C)
If the temperature cut avoidance method of the present invention is not applied to the device, damage to the device due to overheating can be definitely prevented.

Furthermore, as a method of avoiding a temperature cut, when a flow rate regulating valve is provided in the fuel supply path, the burner may be set to a small flame.

[0041] In this embodiment, the conditions for avoiding the temperature cut mode or changing the cut temperature by operating the timer for a predetermined period of time are when the temperature sensed by the temperature sensor rises above the cut temperature. However, there are other methods as follows.

In addition to the above conditions, as shown in FIG.
Only when the limit switch 12 is turned on (or off) when the temperature sensor 8 is pushed upward by the elastic force of the spring 11 when the cooking pot 6 is lifted, the timer 10 is activated to avoid or cut the temperature cut mode. The temperature may also be changed.

According to this method, it is possible to determine whether the pot is shaking to lift the cooking pot 6 by turning on (or off) the limit switch 12, so when the pot is not shaking, the temperature is cut immediately when the cutting temperature is reached, and the burnt food is prevented. It is possible to prevent the progression of such problems, and the safety is excellent.

Whether or not the cooking pot 6 is placed again after stopping shaking the pot depends on whether the limit switch 12 is off (or on).
Since the determination can be made based on the decrease in temperature sensed by the temperature sensor 8, the reaction is faster than when the determination is made based on a decrease in the temperature sensed by the temperature sensor 8.

In this embodiment, a gas burner that burns fuel gas is used as the heating means, but a burner that burns liquid fuel may also be used. In this embodiment, a thermistor is used as the temperature sensor, but a thermocouple or the like may also be used as the temperature sensor.

[0046]

Effects of the Invention (Claims 1 and 3) The present invention avoids the temperature cut mode within a predetermined time after the temperature sensed by the temperature sensor exceeds the cut temperature, or reduces the temperature to a temperature higher than the cut temperature. Change the temperature at which the cut is made to continue burning.

If the temperature sensed by the temperature sensor still exceeds the cut temperature even after a predetermined period of time has passed since the temperature sensed by the temperature sensor exceeds the cut temperature, the opening/closing means is controlled to close the fuel supply path. Shut off and automatically extinguish the fire.

As a result, during the predetermined period of time, the temperature cut mode will not operate and automatically extinguish the fire while shaking the pot, improving usability.

(Claims 2 and 4) While the timer is operating, that is, when a predetermined period of time has not elapsed since the temperature sensed by the temperature sensor exceeded the cut temperature, the temperature sensor determines whether or not the shaking of the pot has been stopped. This can be determined based on whether the sensed temperature has fallen below the cut temperature. Therefore, there is no need to separately provide a determining means for determining whether or not shaking of the pot has been stopped, resulting in low cost.

Furthermore, if the temperature sensed by the temperature sensor falls below the cut temperature while the timer is operating, the temperature cut mode is immediately returned to, thereby avoiding an unnecessary temperature cut mode, or when the temperature is higher than the cut temperature. Safety can be improved because the continuation of a state in which the temperature has been changed can be eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the main parts of a table stove with a temperature sensor according to a first embodiment.

FIG. 2 is a perspective view showing a table stove with a temperature sensor according to the first embodiment.

FIG. 3 is a graph showing the relationship between the temperature of the cooking pot and the elapsed time.

FIG. 4 is a flowchart showing the operation of the computer according to the first embodiment.

FIG. 5 is a flowchart showing the operation of the computer according to the second embodiment.

FIG. 6 is a sectional view showing a modification of the table stove with a temperature sensor.

[Explanation of symbols]

1 Table stove with temperature sensor (temperature sensor added heat cooker) 2 Gas burner (heating means) 3 Gas supply path (fuel supply path) 4 Gas valve (opening/closing means) 5 Computer (control means) 6 Cooking pot 8 Temperature sensor 10 Timer

Claims (4)

[Claims] 1. A heating device that heats a cooking pot by burning fuel, an opening/closing device that is interposed in a fuel supply path that supplies fuel to the heating device, and a temperature sensor that detects the temperature of the cooking pot. and a control means for performing a temperature cut mode in which the opening/closing means is controlled to cut off the fuel supply path when the temperature sensed by the temperature sensor rises above the cut temperature, A heat cooker with a temperature sensor, characterized in that it has a timer that operates for a predetermined time after the temperature sensed by the temperature sensor exceeds the cut temperature, and when the timer is activated, the temperature cut mode is avoided. . 2. The control means immediately returns the temperature cut mode when the temperature sensed by the temperature sensor falls below the cut temperature while the timer is operating. Temperature sensor added heat cooker. 3. The cooking pot includes a heating means for heating the cooking pot by burning fuel, an opening/closing means interposed in a fuel supply path for supplying fuel to the heating means, and a temperature sensor for sensing the temperature of the cooking pot. and a control means for performing a temperature cut mode in which the opening/closing means is controlled to cut off the fuel supply path when the temperature sensed by the temperature sensor rises above the cut temperature, It has a timer that operates for a predetermined time after the temperature sensed by the temperature sensor exceeds the cut temperature, and when the timer is activated, the temperature at which the temperature cut is performed is changed to a temperature higher than the cut temperature. A heat cooker with a temperature sensor. 4. The control means is characterized in that when the temperature sensed by the temperature sensor falls below the cut temperature while the timer is operating, the control means immediately returns the temperature at which the temperature cut is performed to the original cut temperature. The temperature sensor-added heat cooker according to claim 2.