JP3596779B2 - Cooking device - Google Patents

Description

[0001]
[Industrial applications]
The present invention relates to a cooking device that measures the pot bottom temperature and controls the heating power such as fire extinguishing when the pot bottom temperature reaches a set temperature to ensure safety.
[0002]
[Prior art]
Measure the bottom temperature of the pan with a thermistor, and when the pan bottom temperature reaches the set temperature, control the heating power such as fire extinguishing to prevent overheating and ensure the safety of cooking appliances such as gas stoves. When cooking (hereinafter referred to as high-temperature heating cooking), the control by the overheating prevention means is changed to the overheating prevention release or the setting temperature for executing the overheating prevention is changed to a high temperature, and the high-temperature heating cooking is performed. It is desirable from the viewpoint of safe use that the overheating prevention or the set temperature for executing the overheating prevention be returned to a low temperature in preparation for the following (hereinafter referred to as low-temperature heating cooking).
[0003]
Therefore, conventionally, there is a type in which the set temperature is changed to a high-temperature heating cooking side and a low-temperature cooking side by a changeover switch. However, after a high-temperature cooking is completed, a return mechanism for returning the changeover switch to the low-temperature cooking side is not provided. However, there are many dangers in use due to forgetting to return, and there was a problem in terms of safety.
[0004]
Further, there is a switch using a tact switch as the switch, and switching is performed by a pulse signal. However, since the switching state is difficult for the user to understand, it is necessary to notify a lamp or a buzzer or the like. There was a problem that it became complicated.
[0005]
[Problems to be solved by the invention]
In view of the above problems of the prior art, the present invention is used in such a manner that a changeover switch on a high-temperature cooking side is automatically returned to a low-temperature cooking side in conjunction with an ignition operation or a fire extinguishing operation. The above-mentioned safety is improved, and at the same time, the switching can be freely performed by manual operation even after the return, and the switching state can be visually discriminated, thereby improving the convenience in use. It is an object.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a cooker according to the present invention comprises:
Temperature detecting means for touching the pan bottom and sensing the pan bottom temperature;
Overheating prevention means for controlling the heating power such as fire extinguishing when the temperature detection means detects the set pan bottom temperature, to prevent overheating,
A cooking device comprising: a switching unit configured to switch a set temperature at which the control by the overheating prevention unit executes the overheating prevention to a high temperature and a low temperature by an operation lever ;
In conjunction with the ignition operation or extinguishing operation of the operation buttons a control lever of the switching means switching the set temperature to perform overheating prevention switch to a low high-temperature and pushed the operating lever in pushing operation of the operation button, the an operation button solving the pressing force is the operation lever is in a free state back to the locked position, characterized in that even with a possible and the switching it drive means to switch to high or low temperatures by manual operation.
[0007]
Furthermore, also characterized in that the visible and switching it state of the switching hands stage.
[0008]
[Action]
In the cooker according to the present invention having the above configuration, when the switching means is switched to the high-temperature heating cooking side and the set temperature at which the control of the overheating prevention means executes the overheating prevention is high, the next ignition operation or fire extinguishing is performed. When the operation is performed, the switching means is switched to the low-temperature heating cooking side via the switching drive means in conjunction with the ignition operation or the fire extinguishing operation, and the control of the overheating prevention means is automatically performed to set the temperature at which the overheating prevention is performed to the low temperature. Let it return.
[0009]
Further, the rear return operation, in addition to switching to hot and cold temperature setting for performing overheating prevention can be performed freely, switching the set temperature to perform more overheat preventing the operation unit or the like of the switching means is either hot or cold The state can be visually determined.
[0010]
【Example】
Hereinafter, an embodiment of a cooker according to the present invention will be described with reference to the drawings.
[0011]
FIG. 1 is a schematic diagram showing the overall configuration of a gas table stove to which the present invention is applied. Reference numeral 1 denotes a thermistor as a temperature detecting means, which is provided on the upper end surface of a movable cylinder 14 urged upward. The temperature of the bottom of the pan is measured in contact with the center of the bottom of the pan 3 placed on the top 2 and the resistance value set in the electronic circuit is compared with the resistance value of the thermistor 1. The temperature of the bottom of the pan rises to the set temperature. When it is determined that power has been supplied to the magnet of the magnetic safety valve MV from a power source such as a dry battery, the supply of gas to the burner 4 is cut off and the fire is automatically extinguished instantaneously.
[0012]
S is a changeover switch, which is a changeover means. The control of the overheat prevention means for energizing or stopping the energization of the magnet of the magnet type safety valve MV is performed by setting the set temperature at which the overheating prevention release or the overheating prevention for high-temperature heating cooking is executed to a high temperature. (For example, 350 ° C.) and for switching the set temperature for executing the overheating prevention or the overheating prevention for the low-temperature heating cooking to a low temperature (for example, 250 ° C.). A slide switch capable of performing the switching by sliding is used.
[0013]
A is a switching driving means for switching the changeover switch S from the overheating prevention release to the overheating prevention or the set temperature at which the overheating prevention is executed from the high temperature to the low temperature in conjunction with the ignition operation or the fire extinguishing operation. As shown in detail in FIG. 1, an operation lever 8 that moves in cooperation with the operation button 6 to move the distal end side right and left around the pivot 7 at the base end as a fulcrum, and a return lever 11 that pivots left and right around the pivot about the pivot 10. Is brought into contact with one end of a pushing piece 9 extending at the upper end of the operating lever 8 by contacting one end of a pushing piece 12 provided at a rear part of the return lever 11, and provided at a front part of the return lever 11. The operating piece 13 is applied to the upper surface of the operation lever 5 of the changeover switch S, and the operation lever 5 of the changeover switch S is moved to the upper limit position in conjunction with the push operation of the operation button 6 or the ignition operation or the fire extinguishing operation by the push operation. It has a structure that is depressed to Luo lower limit position.
[0014]
That is, when the operation button 6 is pushed to the left in the figure, the distal end of the operating lever 8 is pushed to the left on the inner surface of the lower end of the operating button 6, so that the distal end of the operating lever 8 is pivoted about the pivot 7. The push lever 9 pushes the pushing piece 12 of the return lever 11 leftward in the figure, so that the return lever 11 rotates clockwise about the pivot 10 as a fulcrum, and is switched by the operating piece 13. The operation lever 5 of the switch S is pushed down from the upper limit position to the lower limit position.
[0015]
In the above operation, when the pressing force is released after the push operation of the operation button 6, the operating lever 8 returns to the locked position of the heart cam by the returning force of the heart cam (not shown). Since the retracted state is set to the free state, the switching operation of the operation lever 5 of the changeover switch S to the upper limit position or the lower limit position is free, and the changeover can be performed by manual operation.
[0016]
Then, the operation lever 5 of the changeover switch S is provided at a position where the operation lever 5 can be viewed (for example, the end of the operation lever 5 is exposed from the front panel of the appliance), and whether the operation lever 5 is at the upper limit position or the lower limit position is determined. The switching state can be clearly determined.
[0017]
When the operation lever 5 is at the upper limit position, the changeover switch S controls the set temperature at which the overheating prevention means executes the overheating prevention cancellation or the overheating prevention to a high temperature to perform high-temperature heating cooking. When the position is switched to the lower limit position, the set temperature at which the overheating prevention means executes the overheating prevention or the overheating prevention is controlled to a low temperature, thereby preparing for safety during low-temperature heating cooking.
[0018]
The operation of the above configuration will be described below.
[0019]
First, the basic configuration will be described with reference to the block diagram of FIG. 3. When the operation lever 5 of the changeover switch S is at the upper limit position and is in a state of performing high-temperature cooking, the next low-temperature cooking is performed. When the operation button 6 is pushed and the ignition operation (M1) is performed, the operation lever 5 of the changeover switch S is pushed down to the lower limit position via the changeover driving means A including the operation lever 8 and the return lever 11. Therefore, the changeover switch S automatically returns to the low-temperature cooking side, and the overheating prevention means controls the overheating prevention or the set temperature for executing the overheating prevention to a low temperature (M2).
[0020]
Thereafter, the operation lever 5 of the changeover switch S is manually slid to the upper limit position to switch to the high-temperature heating side, and the overheating prevention means is controlled to cancel the overheating prevention or execute the overheating prevention. It is also possible to switch to the low-temperature cooking side by sliding, and to control the overheating prevention means to overheat prevention or to set the temperature at which the overheating prevention is executed to a low temperature (M3).
[0021]
Therefore, if the set temperature at which the overheating prevention is released or the overheating prevention is performed is controlled to a high temperature (for example, 350 ° C.) during high-temperature heating cooking, when the cooking is completed or when the set temperature is reached, the magnetic safety valve is set. The power supply to the MV magnet is stopped manually or automatically to extinguish or automatically extinguish the burner. In addition, during low-temperature cooking, when the overheating prevention or the set temperature for executing the overheating prevention reaches the low temperature upper limit temperature (for example, 250 ° C.), the power supply to the magnet of the magnetic safety valve MV is automatically stopped and the burner is automatically extinguished. (M4).
[0022]
Next, a description will be given based on the specific examples of FIGS. 4 and 5. FIG. 4 is a block diagram of an embodiment in which the control by the overheating prevention means is switched from overheating prevention to overheating prevention release when performing high-temperature cooking. It is an example of an electric circuit diagram corresponding to the figure, in which a change in resistance temperature of a thermistor is replaced with a change in voltage by a thermistor input unit M10, and a fire extinguishing temperature (for example, 250 ° C.) is set in a fire extinguishing temperature determination circuit M11. Then, the output voltage from the thermistor input section M10 and the voltage between the voltage dividing point of the resistance voltage dividing circuit are input to the comparator. If the temperature is lower than the set temperature, the output signal is output from the comparator. And a magnet energizing circuit M13 for controlling the energization of the magnet M14 by switching the transistor to the comparator. When the temperature is equal to or lower than the set temperature, the magnet energizing circuit M13 is turned on by the output signal from the comparator to energize the magnet M14. When the fire extinguishing set temperature is reached, the magnet energizing circuit M13 is turned off and the energizing to the magnet M14 is cut off. It has a configuration.
[0023]
The function section M12 for canceling the fire extinguishing function is provided with a cancel command circuit for switching the transistor by operating a cancel command switch in front of the magnet energizing circuit M13. When the temperature reaches the fire extinguishing temperature, an output signal from the comparator is input to the magnet energizing circuit. Even if the switch is turned off, the release command circuit is turned on by the operation of the release command switch, the magnet energizing circuit M13 is turned on, and the magnet M14 can be continuously energized. It works by sliding 5 to the upper limit position and switching.
[0024]
FIG. 5 is an example of a block diagram of an embodiment in which the set temperature for executing the control of the overheating prevention is switched from a low temperature to a high temperature when performing high-temperature heating cooking, and an example of an electric circuit diagram corresponding to the block diagram. Except for the extinguishing temperature determining circuit M11 and the extinguishing function canceling function unit M12, which is the same as the embodiment of FIG. A) A circuit for determining a and a circuit for determining a high set fire extinguishing temperature (for example, 350 ° C.) b are connected in parallel, and these are connected to a magnet energizing circuit M13.
[0025]
By releasing the low set fire extinguishing temperature a by the fire extinguishing cancel function unit, the function extinguishing function unit M12 cancels the fire extinguishing function, so that the high set extinguishing temperature b remains and the fire extinguishing set temperature rises in use. The up command functions by sliding the operation lever 5 of the changeover switch S to the upper limit position for switching.
[0026]
Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.
[0027]
【The invention's effect】
According to the cooking device of the present invention described above, the following effects can be obtained.
[0028]
According to the first aspect of the present invention, when the switching means is switched to the high-temperature cooking side and the set temperature at which the control of the overheating prevention means executes the overheating prevention is high, when the next ignition operation or fire extinguishing operation is performed, Since the switching means is switched to the low-temperature cooking side via the switching drive means in conjunction with the ignition operation or the fire extinguishing operation, the control of the overheating prevention means automatically returns to the low temperature at the set temperature for performing the overheating prevention, The danger in use due to forgetting to return to the low-temperature cooking side after high-temperature cooking is eliminated.
[0029]
In addition, the set temperature to perform overheat prevention of switching it means because even after the automatic return from the hot to the cold switching of these freely performed by manual operation, any switching manually into the hot cooking or cold cooked It is convenient for use.
[0030]
According to the second aspect of the present invention, the switching state between the high temperature and the low temperature at which the overheating prevention is performed can be clearly discriminated visually by the position of the operation unit of the switching means.
[Brief description of the drawings]
FIG. 1 is an overall schematic configuration diagram showing an embodiment of a cooker according to the present invention.
FIG. 2 is a perspective view of only a switching drive unit.
FIG. 3 is a block diagram showing an example of a basic configuration.
FIG. 4 is a block diagram as an embodiment and an electric circuit diagram corresponding to the block diagram.
FIG. 5 is a block diagram of another embodiment and an electric circuit diagram corresponding to the block diagram.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Thermistor 3 Pot MV Magnet type safety valve S Changeover switch A Changeover driving means 5 Operation lever of changeover switch

Claims (2)

Temperature detecting means for touching the pan bottom and sensing the pan bottom temperature;
Overheating prevention means for controlling the heating power such as fire extinguishing when the temperature detection means detects the set pan bottom temperature, to prevent overheating,
A cooking device comprising: a switching unit configured to switch a set temperature at which the control by the overheating prevention unit executes the overheating prevention to a high temperature and a low temperature by an operation lever ;
In conjunction with the ignition operation or extinguishing operation of the operation buttons a control lever of the switching means switching the set temperature to perform overheating prevention switch to a low high-temperature and pushed the operating lever in pushing operation of the operation button, the an operation button solving the pressing force is the operation lever is in a free state back to the locked position, cooker, characterized in that it also includes the possibility and the switching it drive means to switch to high or low temperatures by manual operation. 2. The cooking device according to claim 1, wherein a switching state of the switching means is made visible.

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