JP4373588B2 - Gas burner forgetting to turn off - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a gas burner forgetting to turn off prevention device that extinguishes fire with a forgetting to turn off timer when forgetting to turn off a gas burner.
[0002]
[Prior art and problems to be solved by the invention]
The conventional gas stove was equipped with a forget-to-extinguish timer that extinguishes after a certain period of time regardless of the burning power of the burner. Usually, this forgetting-off timer was set at about 2-3 hours.
[0003]
However, when the gas stove burner is burned at maximum (especially a large-fired burner), if the timer is operated for more than 2 hours, not only will the food and pan burn but also the kitchen wall may be overheated, which is safe. There is a problem in terms of sex. In addition, cooking at the minimum heating power (for example, boiled beans) requires long-time heating, but if the timer fire extinguishes for 2 to 3 hours, the fire is extinguished during cooking, so there is a problem that the use is not good.
[0004]
The present invention has been made in view of the description, and it is an object of the present invention to provide a gas burner forgetting to turn off prevention device that is safer and easier to use.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the gas burner forgetting to turn off prevention device of the present invention includes a valve body 2 for controlling the gas flow rate to the burner 1, and a position detection sensor 3 for detecting the position of the degree of opening and closing of the valve body 2. The burner controller 4 that can recognize the amount of gas supplied to the burner 1 by an electrical signal from the position detection sensor 3 and the forgetting to turn off the burner provided with a forgetting to extinguish timer when the burner 1 is forgotten to be turned off for a limited time. The burner controller 4 changes the setting time of the forgetting to turn off by the burner 1 so that the set time is shorter as the thermal power of the burner 1 is larger and the set time is longer as the thermal power of the burner 1 is smaller . When the set time of the forgetting to extinguish timer is reached, the fire power is automatically controlled so that the burner 1 becomes the smallest fire, and the forgetting to extinguish timer with the smallest fire. And controls to extinguish at the set time. Since the burner 1 is controlled to be extinguished in a shorter time as the thermal power of the burner 1 is larger, safety can be ensured without being inadvertently heated with a large thermal power. In addition, the smaller the burner's thermal power, the longer the fire extinguishes, so it is easier to use without being inadvertently extinguished when cooking with less thermal power.
[0006]
Also, when it is forgetting to turn off the set time depending on the fire force, it is once minimum small fire, there is to be extinguished by forgetting to turn off the timer set time of the smallest small fire, while ensuring the safety of the It can prevent the food from chilling.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a system diagram of the whole gas stove. In this example, the burner 1 includes three stove burners 1a and a grill burner 1b. The burner 1 is provided with a spark plug 5 for igniting the burner 1 and a thermocouple 6 for detecting the flame of the burner 1 by thermoelectromotive force. A gas supply path 8 for supplying gas from the gas inlet 7 is branched into four paths and communicated with each burner 1. An electromagnetic valve 9 for opening and closing the path is arranged in front of the four branches of the gas supply path 8, and a gas flow rate adjusting unit 10 is arranged in each of the branches of the gas supply path 8. . In the gas supply path 8 for supplying gas to the grill burner 1b, a governor 11 for adjusting the pressure in front of the gas flow rate adjusting unit 10 is disposed.
[0008]
Each burner 1 is controlled by a burner controller 4 having a control circuit. By operating each ignition / extinguishing button 33, ignition and extinguishing of each burner 1 are controlled via the burner controller 4. Further, by operating each heating power adjustment button 13, each gas flow rate adjusting unit 10 is adjusted via the burner controller 4 so that the heating power of each burner 1 is adjusted. When the burner 1 is ignited, the igniter switch is turned on, power is supplied to the igniter 14, and the spark plug 5 is discharged. The thermoelectromotive force of the thermocouple 6 is input to the burner controller 4, whereby the burner controller 4 controls the electromagnetic valve 9 and the flow rate adjusting unit 10.
[0009]
The valve body 2 of the gas flow rate adjusting unit 10 is driven by an electric motor 12 so as to adjust the gas flow rate, and position detection for detecting the position of the degree of opening and closing of the valve body 2 driven by the electric motor 12. A sensor 3 is attached to the gas flow rate adjusting unit 10. That is, by detecting the position of the valve body 2 with the position detection sensor 3, the burner controller 4 can recognize the thermal power of the burner 1 based on the amount of gas supplied to the burner 1. The burner controller 4 incorporates a timer to forget to turn it off, and the burner controller 4 controls the solenoid valve 9 to be shut off after a predetermined time has elapsed since ignition. In FIG. 1, A and A ', B and B', C and C ', D and D', E and E ', and F and F' are electrically connected.
[0010]
The electromagnetic valve 9, the governor 11, and the flow rate adjusting unit 10 arranged in the gas supply path 8 are integrally incorporated in one container body 15 as shown in FIGS. The portion of the electromagnetic valve 9 is provided with a valve hole 16 into the gas supply path 8, it is opened and closed by the valve element 18 driven by an electromagnetic actuator 17. A flow rate adjusting unit 10 is disposed in each of the four gas supply paths 8 branched downstream from the solenoid valve 9, but in the flow rate adjusting unit 10 communicating with the grill burner 1b, the flow rate adjusting unit 10 is provided. The governor 11 is arranged further upstream.
[0011]
In the flow rate adjusting unit 10, a closing member 2a is rotatably mounted as a valve body 2 for adjusting the flow rate. The inside of the closing element 2 a is a cavity 19, and the inside of the cavity 19 communicates with the gas inflow path 20 of the container 15. The closing member 2a has a main closing hole 21 and a small fire closing hole 22 as gas passages for communicating the inside of the cavity 19 with the outer periphery of the closing member 2a. The main closing hole 21 serves as the main gas passage. The small fire closing hole 22 is a small fire gas passage. The main closing hole 21 and the small fire closing hole 22 are displaced in the axial direction of the closing element 2a and are displaced by approximately 90 ° in the circumferential direction. The main body 15 is provided with a main gas outflow passage 23 and a small fire gas outflow passage 24 at the position of the outer periphery of the closing member 2 a, and the end of the main gas outflow passage 23 is made to correspond to the main closing hole 21. In addition, the end portion of the small fire gas outflow passage 24 is made to correspond to the small fire closing hole 22. A small fire orifice 25 is provided in the small fire gas outflow passage 24, and the diameter of the small fire orifice 25 is sufficiently smaller than the diameter of the small fire closing hole 22. The main gas outflow channel 23 and the small fire gas outflow channel 24 are joined to and communicated with one outlet channel 26, and the outlet channel 26 is communicated with the burner 1. The main closing hole 21 comprises a circular hole 21a and a pair of wedge-shaped grooves 21b and 21c communicating with the hole 21a. The small fire closing hole 22 is also composed of a circular hole 22a and a pair of wedge-shaped grooves 22b and 22c communicating with the hole 22a.
[0012]
The closing element 2a is rotationally driven by an electric motor 12 such as a stepping motor. The rotation of the electric motor 12 is transmitted to the speed reduction mechanism 27, and the rotation is transmitted from the output shaft 28 of the speed reduction mechanism 27 to the closing element 2a. It has come to be. The output shaft 28 of the speed reduction mechanism 27 and the closing member 2a are connected to each other via a joint 30 and a closing member holding spring 31. A position detection sensor 3 for detecting the rotational position of the closing member 2a is attached to the output shaft 28 of the speed reduction mechanism 27.
[0013]
When the closing member 2a is rotationally driven by the electric motor 12, the gas passage is opened and closed by the closing member 2a as shown in FIGS. 8 (a) (a) ′ to (e) (e) ′. 8A and 8A ′, the rotation angle at which the gas passage area of the main closing hole 21 is maximized is set at the fully open position (the position of the heating power 1 at which the heating power is maximum). It is supplied to the burner 1 only through the hole 21. In the state of the first intermediate thermal power shown in FIGS. 8B and 8B ′ (the thermal power is in the middle and the thermal power 2 position), the gas passage area of the main closing hole 21 is smaller than that in the fully closed position, and the main closing force is reached. The amount of gas supplied to the burner 1 is reduced as the gas passage area of the hole 21 is reduced. In the state of the second intermediate heating power shown in FIGS. 8C and 8C '(the heating power is 3 in the middle and the heating power is 3), the main closing hole 21 is in front of closing and the small closing hole 22 is opened. The state is started (the wedge-shaped groove 21c and the wedge-shaped groove 22b are opened in an overlapping manner), and the gas passing through the main closing hole 21 and the gas passing through the small-fire closing hole 22 through the small-fire orifice 25 are burners. 1 is supplied. Figure 8 (d) (d) 'is open is small fire for閉子hole 22 small fire position (thermal power is small in the state of thermal 4) closes the main閉子hole 21, small fire for閉子hole Only gas that has passed through the small-fire orifice 25 from 21 is supplied to the burner 1. 8 (e) ', the gas passage area of the small fire closing hole 22 is narrowed from the small fire position in the minimum small fire state (the position of the thermal power 5 where the thermal power is narrowed to the minimum position before the misfire). The gas is supplied to the burner 1 with the gas amount reduced to the limit value. Rotating than this minimum small fire condition in the further closing direction閉子2a is mainly閉子hole 21 and the small fire for閉子hole 22 becomes closed and fully closed state.
[0014]
When the minimum small fire state is set, the gas amount is reduced to the burner 1 combustion limit value in accordance with the thermoelectromotive force value of the flame detection thermocouple 6 of the burner 1. In the vicinity of small fires, it is known that the input of gas and the thermoelectromotive force have a relationship that the thermoelectromotive force decreases as the input decreases. Therefore, the input at that time can be indirectly known by reading the thermoelectromotive force. Using this, the burner controller 4 performs control so as to reduce the minimum fire level. That is, after moving the closing element 2a to the small fire position, the gas flow rate is further reduced while reading the thermoelectromotive force of the thermocouple 6, and control is performed so as to burn in the minimum small fire state when the predetermined thermoelectromotive force is reached. is doing.
[0015]
As described above, the thermal power can be adjusted to the level of thermal power 1 to thermal power 5, but in the case of the present invention, it is controlled so that the gas controller 4 is extinguished at a predetermined set time corresponding to the thermal power by the timer forgetting to extinguish. ing. Based on the electrical signal from the position detection sensor 3 that detects the rotational position of the closing member 2a as the valve body 2, the burner controller 4 indicates the current amount of gas (burning power of the burner 1) and the amount of combustion with this amount of gas. The gas supply is automatically cut off when a preset time for a forgetting to turn off timer is reached. The setting time of the forgetting-off timer varies depending on the heating power of the burner 1, and the setting time is shortened as the heating power is increased, and the setting time is increased as the heating power is decreased .
[0016]
This set time T is, for example, as follows.
In the case of a large burner (input Is = 4.19 to 0.47 kW), a large fire (4.19 to 3.26 kW) with the above-mentioned thermal power 1: T = 15 minutes, the first medium fire (3. 25 to 1.74 kW): T = 30 minutes The second medium fire (1.73 to 0.93 kW) with the above-mentioned thermal power 3: T = 45 minutes Small fire (0.92 to 0.47 kW) with the above-mentioned thermal power 4 ): T = 60 minutes Minimum fire (less than 0.47 kW) with the above-mentioned thermal power 5: T = 4 hours. Large fire (2.97) in case of standard (medium) burner (input Is = 2.97 to 0.29 kW) ˜1.74 kW): T = 25 minutes Medium fire (1.73 to 0.93 kW): T = 45 minutes Small fire (0.92 to 0.47 kW): T = 60 minutes Minimum small fire (less than 0.47 kW) ): T = 4 hours, small burner (input Is = 1.16 to 0.17 kW), large fire (1.16 to 58 kW): T = 30 minutes medium fire (0.58 to 0.47 kW): T = 60 minutes minimum small fire (less than 0.47 kW): T = 4 hours FIG. 2 is a flowchart of control in the case of the large burner. Indicates. By detecting the position of the closing member 2a as the valve body 2 after ignition, it is determined whether the current thermal power of the burner 1 is thermal power 1 to thermal power 5, and if it is thermal power 1, the thermal power is burned for 15 minutes. If it is fired, it is extinguished when it burns for 30 minutes with this power, and if it is 3 it is extinguished when it burns for 45 minutes with this power, and this power when it is 4 The fire is extinguished when burned for 60 minutes, and if the power is 5, the fire is extinguished when burned for 4 hours with this heat. In this way, when the thermal power is large, it can be extinguished in a short time to ensure safety, and when the thermal power is small, it will be extinguished after a long time and it will not be extinguished during cooking, making it easy to use It won't get worse.
[0017]
In addition, according to an electrical signal from the position detection sensor 3 that detects the rotational position of the closing member 2a as the valve body 2, the burner controller 4 burns at the current gas amount (burning power of the burner 1) and this gas amount. When the set time of a preset forgetting-off timer is reached, the burner controller 4 is controlled so as to reduce the gas amount to the minimum and burned with the minimum small fire power, and further left with the minimum small fire. After that, after burning to the set value of the timer forgetting to turn off with the minimum small fire, it is controlled to automatically shut off the gas.
[0018]
FIG. 3 shows a flowchart of the above control in the case of a large burner. By detecting the position of the closing member 2a as the valve body 2 after ignition, it is determined whether the current thermal power of the burner 1 is thermal power 1 to thermal power 5, and if it is thermal power 1, the thermal power is burned for 15 minutes. When the power is 2, the power is controlled to be 5 when the power is burned for 30 minutes. When the power is 3, the heat is burned for 45 minutes. If it is controlled to become thermal power 5 and if it is thermal power 4, it is controlled to become thermal power 5 when burned with this thermal power for 60 minutes, and if it is in thermal power 5, it will extinguish when burned with this thermal power for 4 hours Is done. Even when the thermal power is controlled to be reduced from the thermal power 1 to the thermal power 4 to the thermal power 5, the fire is extinguished when the thermal power 5 burns for 4 hours. In this case as well, safety can be ensured because the heating power is once reduced to the minimum small fire by the forgetting to extinguish timer, and the food to be cooked can be prevented from being cooled because it continues to burn for the set time with the minimum small fire.
[0019]
【The invention's effect】
According to a first aspect of the present invention, a valve body for controlling the gas flow rate to the burner, a position detection sensor for detecting the position of the opening / closing degree of the valve body, and an electric signal from the position detection sensor to the burner. A burner forget-to-extinguish prevention device with a burner controller that can recognize the amount of gas to be supplied and a forget-to-extinguish timer that extinguishes only when the burner is forgotten to be extinguished. The setting time of the forget-to-extinguish timer is changed by the burner's heating power so that the setting time becomes longer as the heating power of the burner is smaller , and the burner controller automatically sets the burner to the minimum small fire when the setting time of the forgetting-off timer is reached. and it controls to extinguish by forgetting timer setting time with minimal small fire to control the heating power so that a short time as the heating power of the burner is large Because it is controlled to be extinguished, it is possible to ensure safety by avoiding inadvertent heating with a large heating power, and the smaller the burning power of the burner, the longer the fire extinguishes, so the smaller the heating power. It is easy to use because it is not inadvertently extinguished when cooking.
[0020]
Moreover, when it is time to forget to extinguish according to the heating power, it is temporarily set to the minimum small fire, and is extinguished at the set time of the minimum small fire forgetting to extinguish. It can prevent from cooling down.
[Brief description of the drawings]
FIG. 1 is a system diagram of an entire gas stove according to an embodiment of the present invention.
FIG. 2 is a flowchart for explaining the operation of the example of the above.
FIG. 3 is a flowchart for explaining the operation of another example of the above.
FIG. 4 is a cross-sectional view as seen from the front of the body incorporating the solenoid valve, flow rate adjusting unit and governor.
5 is a cross-sectional view seen from the side of FIG. 4. FIG.
6 is a plan view of FIG. 4. FIG.
7 is a cross-sectional view illustrating a cross-sectional position in FIG.
FIGS. 8A to 8E are operation explanatory views of a section taken along line XX in FIG. 7, and FIGS. 8A to 8E are views of a section taken along line YY in FIG. It is operation | movement explanatory drawing.
9A is a cross-sectional view of a closing member as the valve body, FIG. 9B is a cross-sectional view taken along the line ZZ in FIG. 9A, and FIG. 9C is a cross-sectional view taken along the line WW in FIG. .
[Explanation of symbols]
1 Burner 2 Valve body 3 Position detection sensor 4 Burner controller

Claims (1)

A valve body that controls the gas flow rate to the burner, a position detection sensor that detects the position of the degree of opening and closing of the valve body, and a burner controller that can recognize the amount of gas supplied to the burner by an electrical signal from the position detection sensor; , A burner forget-to-extinguish prevention device equipped with a forget-to-extinguish timer that extinguishes only when the burner is forgotten to be extinguished. The burner controller changes the setting time of the forgetting to extinguish timer according to the burner power , and the burner controller automatically controls the heating power so that the burner becomes the minimum small fire when the forgetting to extinguish timer setting time is reached. forgetting prevention equipment of a gas burner, characterized in that the control so as to extinguish by forgetting to turn off the timer of the set time of the fire.

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