JPH1114060A - Gas cooking stove with temperature control function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a favorable temperature control even with a burner having a strong thermal power by providing an interlocking mechanism which forcibly operates a flow control valve such that the thermal power of the burner is made weaker than a high flame as interlocked with an igniting or extinguishing operation of the burner. SOLUTION: A lever 23 is provided with a connecting portion 23d which extends in a frontward direction by way of a spring joint 23c. A thermal power adjusting piece 7 is mounted on the front end of this connecting portion 23d. When this thermal power adjusting piece 7 is slid in a rightward direction, a flow control valve 15 is moved downwardly so as to reduce the gas rate. To the contrary, when the thermal power adjusting part 7 is slid in a leftward direction, the flow control valve 15 is moved upwardly so as to increase the gas rate. A gas cooking stove is provided with an interlocking mechanism which operation is interlocked with the igniting operation by an ignition/extinction button to forcibly operate the flow control valve 15 to weaken the thermal power of a large burner than a high flame. This interlocking mechanism consists of a force point portion 24a which faces a protruding portion 18b of a movable part 18 which is pivotally mounted on a side surface of an elevating portion 17a of a valve casing 17 and an interlocking lever 24 which is provided with a working point portion 24b which comes into contact with a pin 15a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas stove with a temperature control function which enables cooking of tempura and boiled food while maintaining the temperature at a constant level.

[0002]

2. Description of the Related Art A gas stove with a temperature control function is provided with a burner for supplying gas via a manually operated flow control valve and an electrically controlled temperature control valve such as an electromagnetic on-off valve, and is heated by the burner. A temperature sensor for detecting the temperature of the object to be cooked, and control means for controlling the burner, wherein when the temperature control mode is selected as the control mode of the control means, the temperature detected by the temperature sensor is maintained at a predetermined set temperature. The temperature control valve is controlled.

[0003] By the way, a gas stove may be provided with a standard burner having a thermal power of about 3000 kcal / h on a high heat and a large burner having a thermal power of about 4000 kcal / h on a high heat. Is controlled only by the standard burner.

[0004] In order to improve usability, it is desired that control can be performed in the temperature control mode even with a large burner. Here, large burners are frequently used for stir-fried foods and Chinese dishes that require strong heat, so the flow control valve for the large burner may be left in a fully open state that sets the large burner to high heat. Many. If control is performed in the temperature control mode in this state, if the temperature control valve is an electromagnetic on-off valve, the thermal power will suddenly decrease when the temperature control valve is closed, and it will be easy to misfire. Even if the valve is closed, the temperature greatly overshoots, resulting in poor temperature control.

[0005] Further, there is also known a type in which the temperature control valve is constituted by an electric valve capable of adjusting the flow rate. However, when the manual flow control valve is fully opened, the amount of change in the heating power with respect to the change in the unit opening of the temperature control valve is reduced. As a result, it becomes difficult to delicately adjust the heating power, and the accuracy of controlling the temperature deteriorates.

[0006]

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to make it possible to perform good temperature control even with a burner having a high thermal power.

[0007]

Means for Solving the Problems In order to solve the above problems,
A burner that supplies gas through a manual flow rate regulating valve and an electrically controlled temperature regulating valve, a temperature sensor that detects the temperature of the object to be heated by the burner, and a control unit that controls the burner. A gas stove with a temperature control function for controlling a temperature control valve such that a temperature detected by a temperature sensor is maintained at a predetermined set temperature when a temperature control mode is selected as a control mode of the control means. According to the first feature, there is provided an interlocking mechanism for forcibly operating the flow control valve so that the heating power of the burner becomes weaker than the high fire in conjunction with the ignition operation or the fire extinguishing operation of the burner. According to the feature, when the temperature control mode is selected, the notifying means is provided for notifying when the flow regulating valve is in a state of increasing the heat of the burner to a high value.

According to the first feature, the heat of the burner at the time of ignition becomes weaker than that of the strong fire, and control in the temperature control mode is performed in this state. Therefore, when an electromagnetic on-off valve is used as the temperature control valve, the amount of decrease in the thermal power caused by closing the valve is relatively small, thereby preventing misfiring and suppressing overshoot. When a valve is used, the amount of change in the heating power with respect to the change in the unit opening of the temperature control valve is reduced, the accuracy of temperature control is improved, and good temperature control can be performed.

According to the second feature, when the temperature control mode is selected in a state where the flow regulating valve sets the burner to a high heat, that is, in a state where the burner is left in a fully open state, the heat is controlled by the notification means. The user is informed that it is too strong. Then, since the user narrows the flow control valve from the fully opened state, good temperature control can be performed similarly to the first feature.

Therefore, in a gas stove provided with a standard burner and a large burner, the control in the temperature mode can be favorably performed even with the large burner, and the usability is improved.

[0011]

FIG. 1 shows a gas stove having a grill 1, a large burner 2 on the right side and a standard burner 3 on the left side. Temperature sensors 2a and 3a for detecting the temperature by contacting the pot bottom are provided. In addition, the thermal power of the large burner 2 with high heat is 4000k.
cal / h, and the thermal power of the standard burner 3 at high heat is about 3000 kcal / h.

On the front panel 4 of the stove, a fire extinguisher button 5 for a burner (not shown) for a grill, a fire extinguisher button 6 for a large burner 2, and a heating power adjuster for the large burner 2 thereon. 7, a point extinguishing button 8 for standard burners 3, the thermal coordinator 9 for standard burners 3 thereon, a temperature control switch 10 ₁ for a large burner 2, the temperature setting for large burners 2 thereunder Part 1
1 _1, a temperature control switch 10 ₂ for standard burner 3, the temperature setting unit 11 ₂ for standard burners 3 thereunder are provided.

FIG. 2 shows a gas supply path 12 for the large burner 2.
As shown in the figure, in order from the upstream side, the electromagnetic safety valve 13, the main valve 14, the flow regulating valve 15, the bypass orifice 16a
And a temperature control valve 16 comprising an electromagnetic on-off valve. The electromagnetic safety valve 13, the main valve 14, and the flow regulating valve 15 are the valve casing 1 of the valve unit shown in FIGS. 3 and 4.
7 A movable element 18 is provided at the front end of the valve casing 17 and is urged forward (to the right in FIG. 4) by a spring 18 a to be in contact with the back surface of the point fire button 6. The rod 19 is inserted into the valve casing 17 and the rear end of the rod 19 is connected to the electromagnetic safety valve 1.
The valve body 14a of the main valve 14 is attached to the intermediate portion of the rod 19 while facing the third valve body 13a.

The mover 18 includes a push-push mechanism 20
Thereby, the returning operation from the rear end position of the push-off operation is locked at the intermediate position. When the point fire extinguishing button 6 is pressed, the rod is pushed backward through the mover 18, the main valve 14 is opened, and the electromagnetic safety valve 13 is pressed and opened (the state of FIG. 4). The ignition switch is turned on and the large burner 2 is ignited. When the large burner 2 is ignited, the electromagnetic safety valve 13 is kept open by the electromotive force of the thermocouple 21 (see FIG. 2) facing the burner 2. In this state, the push operation of the fire extinguishing button 6 is released, and the mover 18 is returned to the intermediate position locked by the push-push mechanism 20.
In this intermediate position, the pressing of the electromagnetic safety valve 13 is released, but the main valve 14 is kept in the open state, and the large burner 2 is kept in the ignited state. When the point fire extinguishing button 6 is pressed again, the lock of the mover 18 at the intermediate position is released, and when the push operation is released, the mover 18 returns to the front start position.
4 is closed and the large burner 2 is extinguished.

The push-push mechanism 20 has a substantially heart-shaped cam groove 20 formed in the mover 18 as shown in FIG.
0 and an engaging element 201 that engages with the heart-cam type known in Japanese Patent Publication No. 1-59498. When the mover 18 is moved from the start position to the end position by the first push operation (ignition operation) of the point fire extinguishing button 6, the engagement element 201 is moved from the point a of the cam groove 200 to the position b.
When the push operation is released at the end position, the engaging element 201 shifts from the point b to the point c of the cam groove 200, and the movable element 18 is locked at the intermediate position. When the push operation (fire extinguishing operation) is performed, the engaging element 201 shifts from the point c to the point d of the cam groove 200, and when the pressing operation is released, the engaging element 201 is released.
Returns from point d to point a, and the mover 18 returns to the start position. Then, the cam groove 200 is formed in a deformed heart shape in which the longitudinal distance between the points a and d is shorter than the longitudinal distance between the points a and b, and the movable element 18 corresponds to the point d. The ignition switch is turned on when the vehicle is moved backward from the position where the ignition switch is turned on. Thus, the ignition switch is not turned on during the fire extinguishing operation.

The flow regulating valve 15 includes a valve casing 17
And a needle valve rotatably and vertically inserted into an upper end portion of a rising portion 17a extending upward. A cap 22 is mounted on the upper end of the rising portion 17a. An oblique guide hole 22a is formed in the cap 22, and a pin 15a attached to the upper end of the flow control valve 15 is engaged with the guide hole 22a. I have. A lever 23 is pivotally mounted on the upper surface of the cap 22 by a shaft 23a.
3, a fork portion 23b sandwiching the pin 15a is formed.
It is guided by 2a and moves up and down, so that the amount of gas supplied to the large burner 2 is increased or decreased.

The lever 23 includes a spring joint 23
A connecting portion 23d extending forward through the connector c is provided, and the thermal power adjuster 7 is attached to a front end of the connecting portion 23d.
When the thermal power regulator 7 is slid to the right in FIG. 1, the flow regulating valve 15 moves downward, the gas amount decreases, and the large burner 2
When the heat power is weakened, and the heat power regulator 7 is slid to the left, the flow control valve 15 moves upward, the gas amount increases, and the heat power of the large burner 2 increases.

The front wall of the cap 22 has a connecting portion 23d.
A slide guide hole 22b as shown in FIG. 6 for inserting a guide piece 23e extending rearward from the guide hole 23b is formed, and a step for stopping the slide to the right of the thermal power regulator 7 right before the low heat position is provided on the right side of the guide hole 22b. A portion 22c is formed to prevent the large burner 2 from misfiring due to sudden switching to the low fire position. When the thermal power adjuster 7 is lifted at the stop position by the step portion 22c, the guide piece 23e is tilted by the connecting portion 23d of the spring joint 23c, and the guide portion 23e is turned.
c, the heat power adjuster 7 can slide to the low heat position.

The valve configuration for the standard burner 3 is the same as the valve configuration for the large burner 2 described above. However, the valve unit for the large burner 2 is provided with an interlocking mechanism described below, whereas the valve unit for the standard burner 3 is not provided with an interlocking mechanism. This interlocking mechanism cooperates with the ignition operation of the large burner 2 by the fire extinguishing button 6 to forcibly operate the flow control valve 15 so that the heating power of the large burner 2 becomes weaker than the high fire. It comprises an interlocking lever 24 pivotally attached to the side surface of the rising portion 17a. Interlocking lever 24
Is a protruding portion 1 formed on the upper part of the mover 18 and protruding rearward.
8b, and a force point portion 24a at the lower end opposed to the pin 8a and an action point portion 24b at the upper end capable of abutting the pin 15a from behind. Then, when the mover 18 is pushed to a position behind the position corresponding to the point d by the pushing operation at the time of ignition of the point fire button 6, the projection 18b comes into contact with the power point portion 24a, and the interlocking lever 24 is moved. Rocked. At this time, the pin 15a engages with the uppermost portion behind the guide hole 22a, and the flow control valve 15
Is fully open, the action point 24b of the interlocking lever 24 contacts the pin 15a, and the pin 15a is pushed forward. As a result, the flow regulating valve 15 is guided by the guide hole 22a and moves downward, the gas amount is reduced, and the heating power of the large burner 2 is weakened as compared with the high heat. In the present embodiment, the large burner 2
Of the standard burner 3 is 3000
kcal / h. After the ignition, when the mover 18 returns to the intermediate position, the protrusion 18b separates from the power point portion 24a, the restriction of the flow control valve 15 by the interlocking lever 24 is released, and the flow control valve 15 is freely operated by the thermal power adjuster 7. become able to. Further, at the time of the fire extinguishing operation, since the mover 18 moves only to the position corresponding to the point d, the interlocking mechanism operates only at the time of the ignition operation.

The flow regulating valve 15 is forcibly operated so that the heat is weaker than the strong fire in conjunction with the fire extinguishing operation of the large burner 2, so that the fire of the large burner 2 does not become strong at the next ignition. good. For example, the push-push mechanism 20
Is formed in a normal heart shape such that the distance in the front-rear direction between points a and d is equal to the distance in the front-rear direction between points a and b. By swinging the interlocking lever 24, the flow control valve 15 is forcibly operated so that the heating power is weaker than the strong fire. When an ignition button and a fire extinguishing button are provided, the flow is adjusted by pressing the fire extinguishing button. What is necessary is just to forcibly operate the valve 15 so that the heating power is weakened more than the high heat.

Signals from the temperature sensor 2a for the large burner 2, the temperature control switch 10 ₁ and the temperature setting unit 11 ₁ are inputted to the control means 25 for the large burner 2 comprising a microcomputer. The control means 25 is activated at the time of ignition of the large burner 2 by the fire extinguishing button 6 and controls the post-ignition temperature control switch 10.
₁ executes the control in the depressed is the temperature control mode, when the temperature control switch 10 ₁ is not pressed to perform the control in the overheat prevention mode. In addition, even when the temperature control mode is selected, control in the overheat prevention mode is performed in order to cope with an abnormal rise in temperature due to empty cooking.

In the overheat prevention mode, when the temperature detected by the temperature sensor 2a rises abnormally (for example, 250 ° C.) due to empty cooking or the like, a normally closed fire extinguishing system intervening in a safety valve circuit connecting the thermocouple 21 and the electromagnetic safety valve 13. The switch 26 is turned off, the electromagnetic safety valve 13 is closed, and the large burner 2 is extinguished. The output of the thermocouple 21 is input to the control means 25, and the control means 25 is controlled according to the output from the thermocouple 21 and the output from the temperature sensor 2a.
May be used to control the energization of the electromagnetic safety valve 11 and stop the energization of the electromagnetic safety valve 11 when the temperature detected by the temperature sensor 2a abnormally rises in the overheat prevention mode.

[0023] In temperature control mode, the temperature when the temperature detected by the temperature sensor 2a is closed the temperature control valve 16 when it is set above the temperature set by the temperature setting unit 11 _1, the detected temperature is below the set temperature The adjusting electromagnetic valve 16 is opened. In this case, the flow control valve 15 is fully opened and the heat of the large burner 2 is 4000
If it is about kcal / h, the thermal power rapidly decreases from 4000 kcal / h to a minimum thermal power of about 400 kcal / h secured by the bypass orifice 15a due to the closing of the temperature control valve 16, and it becomes easy to misfire. In addition, the overshoot becomes large, resulting in poor temperature control. However, in the present embodiment, the heating power of the large burner 2 at the time of ignition is 30 at the maximum.
Since the temperature is regulated to 00 kcal / h, the amount of decrease in the thermal power caused by closing the temperature control valve 16 is relatively small, so that misfire is prevented, overshoot is suppressed, and good temperature control can be performed.

[0024] Also in a standard burner 3, overheating in the same manner as described above temperature control mode by the temperature sensor 3a and a control means for inputting a signal from the temperature control switch 10 ₂ and the temperature setting unit 11 ₂ which for a standard burner 3 Control in the prevention mode.

FIG. 7 shows a second embodiment, and the same members as those in the first embodiment are denoted by the same reference numerals.
In the second embodiment, the interlocking lever 24 of the first embodiment is used.
Instead, a position sensor 27 comprising a limit switch or the like for detecting when the thermal power regulator 7 for the large burner 2 is in the high-fire position is provided, and the signal from the sensor 27 is controlled. Input to means 25, and
Notification means 2 such as a buzzer controlled by control means 25
8 are provided.

The temperature control switch 10 for the large burner 2
_When the temperature control mode is selected by pressing ₁ , the control means 25
Is based on the signal from the position sensor 27, whether or not the thermal power adjuster 7 is in the high heat position,
Is determined to be in a state in which the heat of the large burner 2 is set to high heat, and if it is in the high heat position, the notification means 28 is operated. According to this, it is possible to urge the user to pay attention and to reduce the heating power, and a good temperature control is performed.

As shown in FIG. 8, a left step 22d is formed in the slide guide hole 22b on the front wall of the cap 22 in addition to the right step 22c, so that the thermal power of the large burner 2 is 300.
The sliding of the thermal power adjuster 7 toward the high-fire side is temporarily stopped at a medium-fire position where the pressure is about 0 kcal / h, and the thermal power adjuster 7 is lifted and slid to the high-fire position at the medium-fire position. Then, the connecting portion 23 for mounting the thermal power adjuster 7
The position sensor 27 is pushed by the connecting portion 23d when the heating power adjuster 7 is lifted at the medium heat position, and the position sensor 27 is thereafter located at a position on the high fire side from the medium heat position. 27 is continuously pressed. Therefore, the notification means 28 operates until the heating power of the large burner 2 is reduced to about 3000 kcal / h.

It is to be noted that a different sound is output by the notification means 28 in the case of high heat and in the case of non-high heat, for example, a short "pi, pi, pi" sound for notifying that the temperature control mode has been selected in the case of non-high heat. May be issued, and in the case of a high fire, an alarm sound of "Pee, Pee" may be emitted. Further, the notification means 28 may be a means for visually notifying such as an alarm lamp.

The method of the second embodiment can also be applied to a stove for performing point fire extinguishing and thermal power adjustment with a gas cock. That is, when the cock of the gas cock is rotated to the ignition position at the end of the rotation stroke and left as it is, the heat of the burner becomes strong, but when the temperature control mode is selected in this state, the notification means is activated and the user is informed. You only need to know that the firepower is too strong.

In the above-described embodiment, the electromagnetic on-off valve is used as the temperature control valve 16. However, an electric valve for adjusting the flow rate by driving the valve body with a motor is used as the temperature control valve. With the valve fully open and the temperature sensor 2
The electric valve may be controlled so that the detected temperature of a is maintained at a predetermined set temperature. Even when using a motor-operated valve, if the flow control valve 15 is in a state in which the heating power of the large burner 2 is set to a high value, the amount of change in the heating power with respect to a change in the unit opening of the motor-operated valve becomes too large, making it difficult to perform fine heating power adjustment. Therefore, the flow regulating valve 15 is forcibly operated in conjunction with the ignition operation or the fire extinguishing operation so that the heating power of the large burner 2 becomes weaker than the strong fire, or the flow regulating valve 15 is switched to the large burner 2 when the temperature control mode is selected.
It is desirable to operate the notifying means 28 as described above when there is a state in which the heating power of the above is set to a high fire.

In the above embodiment, the temperature control switch 1
Press 0 ₁ to select the temperature control mode, and set the set temperature in the temperature setting section 11 ₁ to a temperature suitable for cooking, for example, 180 degrees for tempura.
The temperature is set manually to 100 ° C in the case of ℃ and the water heater, but various cooking buttons such as a tempura button and a water heater button are provided, and when the cooking button is pressed, the temperature mode is selected and the set temperature is a temperature suitable for cooking. May be set automatically. Further, in the above-described embodiment, the control modes are the two types of the temperature control mode and the overheat prevention mode. However, the control mode may include a mode in which the burner is extinguished when the detected temperature rises to a predetermined temperature.

[0032]

As is apparent from the above description, according to the present invention, it is possible to prevent the control in the temperature control mode from being performed in the state of a strong fire, and to perform a good temperature control even with a burner having a strong heat. And the usability of the stove is improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a stove of the present invention.

FIG. 2 is a circuit diagram showing a gas circuit of a large burner and a control system thereof.

FIG. 3 is a perspective view of a burner unit provided in a gas circuit.

FIG. 4 is a sectional view of a burner unit.

FIG. 5 is a diagram showing a shape of a cam groove of the push-push mechanism.

FIG. 6 is a sectional view taken along the line VI-VI of FIG. 4;

FIG. 7 is a circuit diagram showing a gas circuit of a large burner and a control system thereof according to a second embodiment.

8 is a cross-sectional view of the second embodiment corresponding to FIG.

[Explanation of symbols]

2 Large burner 2a Temperature sensor 3 Standard burner 10 ₁ Temperature control switch for large burner 24 Interlocking lever (interlocking mechanism) 25 Control means 28 Notification means

Claims (3)

[Claims] 1. A burner for supplying gas through a manual flow control valve and an electrically controlled temperature control valve, a temperature sensor for detecting a temperature of an object to be heated by the burner, and a burner. A gas stove with a temperature control function for controlling a temperature control valve such that a temperature detected by a temperature sensor is maintained at a predetermined set temperature when a temperature control mode is selected as a control mode of the control means. The gas stove with a temperature control function according to any one of claims 1 to 3, further comprising an interlocking mechanism for forcibly operating the flow control valve so as to make the heat of the burner weaker than the high fire in conjunction with the ignition operation or the fire extinguishing operation of the burner. 2. A burner for supplying gas via a manual type flow control valve and an electrically controlled temperature control valve, a temperature sensor for detecting a temperature of an object to be heated by the burner, and a burner. A gas stove with a temperature control function for controlling a temperature control valve such that a temperature detected by a temperature sensor is maintained at a predetermined set temperature when a temperature control mode is selected as a control mode of the control means. The gas stove with a temperature control function according to any one of claims 1 to 3, further comprising a notification means for notifying when the flow control valve is in a state of increasing the heat of the burner when the temperature control mode is selected. 3. The temperature control function according to claim 1, wherein the gas stove includes a standard burner and a large burner having a higher thermal power than the standard burner, and the burner is a large burner. Gas stove with gas.