JPH04244517A - Operation temperature automatic judgement device for gas range etc - Google Patents

Abstract

PURPOSE:To prevent mistaken operation by measuring a pan bottom temperature with use of a thermistor temperature measurement element located at the center of a burner, and judging setting operation temperature dependent upon the use based on the temperature in a heating process and the state of temperature rise for automatic switching. CONSTITUTION:Once a gas burner 1 is fired in the case of cooking and the like, temperature in a heating process is transferred from about 100 deg.C to a predetermined temperature zone. In a burning prevention mode where said transferred temperature sustains for a predetermined time, if range bottom disposed at the center of the burner 1 exceeds a cut temperature gas supply is interrupted by a controller C. In the case of fried for example, once the burner 1 is fixed, temperature is continuously raised up to a temperature of oil smoking and a relationship between the temperature and time is checked. Thereafter, as pan bottom temperature exceeds cut temperature as a dried fish burning prevention mode, gas supply is interrupted. The same operation is performed for the case of iron plate cooking. Since the modes are automatically switched depending upon the temperature in the heating process and the way of the temperature rise, mistaken operation is avoided and reliability is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic operating temperature determining device for gas stoves, etc.

0002

[Prior technology] The burner is automatically extinguished at the operating temperature appropriate for the purpose of use, for the purpose of preventing fires in tempura, boiling milk, cooking rice in a pot, boiling food, grilling on an iron plate, etc., and is safe and economical. As shown in FIG. 4, for example, as shown in FIG. The burner 1' is automatically extinguished when the temperature at the bottom of the pot is measured by a thermistor thermometer 2' that is in contact with the bottom of the burner, and the burner 1' is automatically extinguished when the temperature at the bottom of the pot reaches the operating temperature set according to the application. The resistance value set by the slide volume 11' and the controller C' is compared with the resistance value of the thermistor thermometer 2' by manually setting it according to the application using the slide volume 11' provided on the front of the pan. When it is determined that the temperature has risen to the set temperature, the magnet valve 4' is de-energized from the dry battery 5' and the burner 1' is instantly and automatically extinguished.

0003

[Problems to be Solved by the Invention] In the above-mentioned conventional technology, the operating temperature according to the application is manually set using a slide volume. There were many risks of tempura fires, scorching of boiled food, etc. due to incorrect operation, and it still lacked reliability.

[0004] Furthermore, since it is necessary to manually adjust the slide volume and set the temperature for each purpose such as boiled food, tempura frying, and teppanyaki, there is a problem that it is extremely troublesome in actual use.

[0005] In view of the problems of the conventional technology, the present invention solves the problems of the conventional technology by making it possible to automatically switch the operating temperature according to the purpose of boiling, tempura frying, teppanyaki, etc. The purpose is to provide an automatic operating temperature determination device for gas stoves, etc.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the automatic operating temperature determination device for gas stoves, etc. of the present invention measures the bottom temperature of the pot with a thermistor thermometer provided in the center of the burner. In automatic fire extinguishing devices such as gas stoves that automatically extinguish the burner when the temperature reaches the set operating temperature,
The main feature is that the operating temperature is automatically switched depending on the temperature of each heating process and the state of temperature rise using microcomputer control, etc. to determine the operating temperature according to the purpose of boiling, tempura frying, teppanyaki, etc. be.

[0007]

[Function] In the automatic operating temperature determination device for gas stoves, etc. of the present invention configured as described above, the operating temperature is set according to the purpose of boiling, tempura frying, teppanyaki, etc., and is controlled by a microcomputer for each heating process. The operating temperature is automatically determined each time based on the temperature and the unique rise method adapted to each temperature, and the operating temperature is automatically switched each time.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of an apparatus for automatically determining the operating temperature of a gas stove or the like according to the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a gas burner, which is equipped with a thermistor temperature sensor 2 in its center. For example, when a pot A is placed on the trivet of a gas stove, the thermistor temperature sensor 2
is in contact with the bottom of pot A to measure the bottom temperature of the pot.

C is a controller for controlling the operation of a gas stove, etc., which includes a thermocouple 3 for controlling ignition, extinguishing, etc., and a magnet 4a of a magnet valve 4 incorporated in a blinking valve body B. , a power source (dry battery) 5, a microswitch 6, etc. are connected, and a microcomputer control circuit that determines and automatically switches the set operating temperature according to the application described later is connected to the thermistor temperature measuring element 2, power source 5, etc. are incorporated in relation to each other.

The operating principle of the embodiment shown in FIG. 1 will now be briefly explained.
When the rotation reaches the ``ignition'' position, the pilot valve 8 is opened via the cam mechanism D, and at the same time the magnetic valve 4 is pushed open and the closure 9 is also opened, and the piezoelectric device E is also activated to discharge the gas burner. 1 is ignited via a pilot burner 10. At the same time, the microswitch 6 is turned on, and the magnet 4a of the magnetic valve 4 is energized from the power source 5 through the controller C, thereby holding the magnetic valve 4 in an open state. Next, when the ignition knob 7 is released, the pilot valve 8 is closed via the cam mechanism D, but the thermocouple 3 is connected to the gas burner 1.
The flame e is detected, and the magnet 4a continues to be energized, and the magnet valve 4 maintains the combustion state (open state).

Next, in the extinguishing operation, when the ignition knob 7 is rotated to the "extinguish" position, the shutter 9 is closed via the cam mechanism D and the gas burner 1 is extinguished. At the same time, the microswitch 6 is turned off and the power supply to the controller C is stopped, so the magnetic valve 4 is also closed.

Incidentally, the heating power can be adjusted freely by rotating the ignition knob 7 within a certain angle range from the ignition position.

[0014] The microcomputer control circuit determines the temperature of the heating process based on the detected value of the thermistor thermometer 2 and the state of temperature rise, and determines the operating temperature set according to the purpose of boiling, tempura frying, teppanyaki, etc. In addition to the automatic switching function, it also has a command function to stop energizing the magnetic valve 4 and automatically extinguish the gas burner 1 when the operating temperature exceeds a set value.

As shown in the graph of FIG. 2, the operating temperature ranges from an inflection point a' near 100°C, which is the boiling point of water, to a constant temperature a during the heating process of boiled food. However, when the temperature in the zone where constant temperature a'' is maintained continues to rise for a certain period of time T, the operating temperature, that is, the cut temperature at which the gas supply is stopped, is set to approximately 105°C as a non-stick mode. (see a in FIG. 2).

Next, in the case of tempura-age, etc., during the heating process of tempura-age, etc., the temperature does not shift to a zone where a constant temperature is maintained around 100°C, but the temperature continues to rise, and the relationship between the temperature and time is determined. , the slope of the graph is t
When the temperature is rising such that 2/t1≦K, the tempura fire prevention mode is set and the operating temperature is set to approximately 250° C., which is just before the oil starts smoking (see b in FIG. 2).

Furthermore, in the case of teppanyaki, etc., the temperature rises rapidly in a short period of time during the heating process of teppanyaki, etc., and the relationship between the temperature and time, that is, the slope of the graph (slope)
When is in a state of temperature rise of t2 /t1 >K,
For Teppanyaki mode, set the operating temperature to approximately 350℃, for example.
℃ (see c in FIG. 2).

The operation of the above configuration will be explained in detail based on the flowchart of FIG. 3. First, in the case of boiling, etc., when the gas burner is ignited in step 100, the temperature during the heating process is normal. , the temperature shifts from an inflection point near 100°C, which is the boiling point of water, to a zone where a constant temperature is maintained. Therefore, when a constant temperature is maintained in step 101, it is checked in step 102 whether or not the constant temperature has been maintained for a certain period of time. For example, if it is set to 105°C in step 103, it is checked in step 104 whether the bottom temperature of the pot is higher than the cut temperature, and if it is higher than the cut temperature, the controller commands to cut off the power to the magnetic valve. In step 105, the gas burner is immediately automatically extinguished.

Next, in the case of tempura-age, step 10
When the gas burner is ignited at zero temperature, there is no zone in which the temperature during the heating process maintains a constant temperature around 100°C, and the temperature continues to rise to the smoking temperature of the oil. Therefore, in step 202, the relationship between temperature and time is determined as t2.
Check whether /t1 ≦K, and t2 /t1 ≦
When the temperature of K is rising, the cut temperature is set at step 20 to stop the gas supply as a tempura fire prevention mode.
For example, if it is set to 250°C in step 104, it is checked in step 104 whether or not the bottom temperature of the pot is equal to or higher than the cutting temperature.
If the cut temperature is higher than the cut temperature, the controller commands to cut off the power to the magnet valve to stop the gas supply, and in step 105, the gas burner is immediately automatically extinguished.

Furthermore, in the case of Teppanyaki, step 10
When the gas burner is ignited at zero, if the temperature during the heating process is normal, it will continue to rise to a temperature sufficient for grilling meat. Therefore, in step 202, it is checked whether the relationship between temperature and time is t2/t1≦K, and t2
When the temperature rises to t2 /t1 >K instead of /t1≦K, the cut temperature at which the gas supply is stopped as Teppanyaki mode is set at step 303, for example, 3.
If it is set to 50°C, then in step 104 it is checked whether the bottom temperature of the pot is higher than the cut temperature or not, and if it is higher than the cut temperature, the controller commands to cut off the power to the magnetic valve and stop the gas supply. Then, in step 105, the gas burner is immediately automatically extinguished.

[0021]

[Effects of the Invention] The automatic operating temperature determination device for gas stoves, etc. according to the present invention controls the operating temperature during the heating process and the temperature rise by microcomputer control, etc., depending on the purpose of boiling, tempura frying, teppanyaki, etc. Since it is configured to automatically switch based on the status, compared to conventional manual operation, there is no risk of erroneous operation as it is determined based on the temperature of the heating process and the way the temperature rises and automatically switches using microcomputer control etc. It is highly reliable.

[0022] Furthermore, it is convenient to use as it eliminates the trouble of manually setting the temperature each time for boiled dishes, fried tempura, teppanyaki, etc., and prevents tempura fires, burnt food, etc. Therefore, it is highly safe and can be used safely even by children, the elderly, and the blind.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an embodiment in which an automatic operating temperature determination device of the present invention is applied to a gas stove.

FIG. 2 is a graph showing an example of the relationship between temperature and time in the heating process.

FIG. 3 is a flowchart showing an example of an operating state.

FIG. 4 is a sectional view of a conventional example.

[Explanation of symbols]

1 Gas burner 2　Thermistor temperature measuring element A Pot

Claims (4)

[Claims] Claim 1: An automatic fire extinguishing device for gas stoves, etc., which measures the bottom temperature of the pot with a thermistor thermometer installed in the center of the burner and automatically extinguishes the burner when the bottom temperature of the pot reaches a set operating temperature. A gas stove characterized by having a configuration in which the operating temperature is automatically switched depending on the temperature of each heating process and the state of temperature rise using microcomputer control or the like to determine the operating temperature according to the purpose of frying tempura, teppanyaki, etc. automatic operating temperature discrimination device. Claim 2: In the heating process of boiled food, etc., at 100°C
When a zone that maintains a constant temperature from nearby continues for a certain period of time, the operating temperature is set to about 1 as a non-stick mode.
2. The automatic operating temperature discriminating device for a gas stove or the like according to claim 1, wherein the operating temperature is set between 00 and 130°C. [Claim 3] In a heating process such as tempura frying, 1
The temperature does not shift to a zone where a constant temperature is maintained around 00℃, but the temperature continues to rise, and the relationship between temperature and time is t2 /t
2. The automatic operating temperature discriminating device for a gas stove or the like according to claim 1, wherein when the condition is 1≦K, the tempura fire prevention mode is set and the operating temperature is set between approximately 220 and 260°C. [Claim 4] In the heating process such as teppanyaki, 10
The temperature does not shift to a zone where it maintains a constant temperature around 0℃, but continues to rise, and the relationship between temperature and time is t2/t1
2. The automatic operating temperature discriminating device for a gas stove or the like according to claim 1, wherein when the state is >K, the operating temperature is set to approximately 260 to 350°C as a teppanyaki mode.