KR102413998B1 - Gas Range - Google Patents

Abstract

To provide a stove capable of obtaining stable ignition performance without surprising an operator even when primary gas pressure fluctuates.
The burner 13, the ignition electrode 7 attached to the burner, and the igniters 81 and 82 for applying a high voltage to the ignition electrode, the gas supply path 3 for supplying fuel gas to the burner, and the gas supply path It is opened and includes an electric flow control valve (6) for increasing or decreasing the amount of fuel gas supplied to the burner by the increase or decrease of the opening, and a controller (C) for controlling the igniter and the flow control valve, the controller, when controlling the ignition of the burner After energizing the igniter, the opening degree of the flow control valve is increased so that the amount of fuel gas supplied to the burner is gradually increased.

Description

stove {Gas Range}

The present invention relates to a burner, an ignition electrode attached to the burner, an igniter for applying a high voltage to the ignition electrode, a gas supply path for supplying fuel gas to the burner, and a gas supply path, It relates to a stove having an electric flow rate control valve for increasing/decreasing the amount of fuel gas supplied to a burner by increasing/decreasing, and a controller for controlling an igniter and a flow rate control valve.

Conventionally, when controlling the ignition of this type of stove burner, the igniter is energized and ignited while the opening degree of the flow control valve is maintained at the opening degree where the fuel gas amount supplied to the burner becomes a predetermined ignition gas amount. There is (for example, refer to patent document 1).

In the above stove, since an electric flow control valve is used, the amount of fuel gas increases or decreases according to the fluctuation of the primary gas pressure, unlike a gas mechanism using a proportional valve with a governor in which the combustion gas amount does not fluctuate even when the primary gas pressure fluctuates. However, the opening degree of the flow control valve during ignition control is set so that ignition can be reliably performed even when the primary gas pressure is low. However, it may surprise the user because it also accompanies a loud ignition sound.

JP 2013-204846 A

In view of the above, an object of the present invention is to provide a stove capable of obtaining stable ignition performance without surprising the user even when the primary gas pressure fluctuates.

In order to solve the above problems, the present invention provides a burner, an ignition electrode attached to the burner, an igniter for applying a high voltage to the ignition electrode, a gas supply path for supplying fuel gas to the burner, and a gas supply path, In the stove having an electric flow control valve for increasing or decreasing the amount of fuel gas supplied to the burner by increasing or decreasing the opening degree, and a controller for controlling the igniter and the flow control valve, the controller is configured to control the ignition of the burner. , when the opening degree of the flow control valve is increased to a predetermined opening degree capable of obtaining a predetermined amount of fuel gas that can be ignited even in a condition in which the burner is difficult to ignite, thereafter, the opening degree of the flow control valve is maintained at the predetermined opening degree.

According to the present invention, since the opening degree of the flow control valve is gradually increased during ignition control of the burner, the amount of fuel gas supplied to the burner is gradually increased. Accordingly, the burner is ignited where the amount of fuel gas supplied to the burner in which the primary gas pressure fluctuates reaches a predetermined ignitable amount. For this reason, it is possible to suppress the generation of a large spark accompanied by a loud ignition sound as in the prior art, and it is possible to obtain stable ignition performance without surprising the user. In addition, it is possible to suppress an unexpected increase in flame before transition to normal combustion control after ignition.

In the present invention, when the controller increases the opening degree of the flow control valve during ignition control of the burner to a predetermined opening degree capable of obtaining a predetermined amount of fuel gas that can be ignited even under conditions in which the burner is difficult to ignite, thereafter, the flow control valve It is preferable to maintain the opening degree of . In this case, it is possible to suppress an unexpected increase in the flame after ignition until normal combustion control is transferred.

Further, in the present invention, it is preferable that the controller increases the opening degree of the flow rate regulating valve from the opening degree corresponding to the lower limit fuel gas amount in which the burner is stable and combustible, during ignition control of the burner. In this case, it is possible to ignite faster than when the flow control valve is slowly opened in a state in which all of the flow control valves are closed, and it becomes possible to reduce a time lag from ignition operation to burner ignition.

To provide a stove capable of obtaining stable ignition performance without surprising an operator even when primary gas pressure fluctuates.

A burner, an ignition electrode attached to the burner, and an igniter for applying a high voltage to the ignition electrode, a gas supply path for supplying fuel gas to the burner, and an amount of fuel gas that is opened in the gas supply path and supplied to the burner by the increase or decrease of the opening degree and a controller for controlling the igniter and the flow control valve, the controller energizes the igniter during ignition control of the burner, and then adjusts the flow rate so that the amount of fuel gas supplied to the burner gradually increases Increase the opening of the valve.

1 is a schematic perspective view showing an embodiment of a stove of the present invention.
Fig. 2 is a circuit diagram showing a gas circuit of the stove shown in Fig. 1;
Fig. 3 is a graph showing the relationship between the opening degree and time of the flow control valve regarding ignition control by the controller shown in Fig. 2;

The stove 1 shown in Fig. 1 is of a built-in type incorporated into a system kitchen in which the drawings are omitted. The stove 1 includes a stove body 11 installed so as to enter an opening opened on the counter top of the system kitchen, a top plate 12 mounted on the counter top so as to cover the upper surface of the stove body 11, , a total of three burners 13 exposed on the top plate 12, #1 on the front left, #2 on the front right, and #3 on the rear center, and a grill 14 incorporated in the stove body 11. are being prepared The burner 13 heats an object to be cooked (not shown in the drawing) such as a pot placed on the container holder 2 placed on the top plate 12 to surround the burner 13 .

As shown in Fig. 2, the gas supply path 3 for the stove 1 includes three burners 13 of #1 to #3 shown in Fig. 1, and the grill 14 provided in the grill 14. Fuel gas is supplied to the burner 13 of #4 that heats the object to be cooked. A one-valve 4 is opened on the upstream side of the gas supply passage 3 , and the gas supply passage 3 branches into four branch passages 3a on the downstream side of the one-valve 4 . and each branch path 3a is connected to each one of the four burners 13 . In each branch path 3a, an electromagnetic safety valve 5 and an electric flow rate control valve 6 are provided. The flow control valve 6 is arranged on the downstream side of the branch path 3a rather than the electromagnetic safety valve 5 . Each flow rate control valve 6 is driven by a motor M to adjust the opening degree of the electric type. The amount of fuel gas supplied to the burner 13 through the branch path 3a is increased or decreased by the increase/decrease in the opening degree of the valve body of the flow rate control valve 6 . As the flow rate control valve 6, it has a needle valve body that advances and retreats in the axial direction through a feed screw mechanism by driving the motor M, or has a disk shape that rotates by rotation of the motor M. What has a rotating valve body can be used.

In addition, an ignition electrode 7 is provided on each burner 13, and a thermocouple for flame detection, which is omitted in the figure, is also provided. And, in the stove 1, an igniter 81 that simultaneously applies a high voltage to the ignition electrode 7 installed on the burners 13 of #1 to #3, and the ignition electrode installed on the burner 13 of #1 An igniter 82 for applying a high voltage to (7) is provided. In the stove 1, the motor M of the one valve 4, the electromagnetic safety valve 5, the flow control valve 6, and the igniters 81 and 82 are controlled by the controller C. For the controller C, for example, a microcomputer or the like is applicable.

In addition, as shown in Fig. 1, on the front panel 11a of the stove main body 11, the power switch 9 and the heat control knob for each of #1 to #4 of the burner 13 are one by one. A combined fire extinguishing button 100 (#1 to #4) is installed. Each point fire extinguishing button 100 is a push-push type, and the immersion state is released by a user pressing operation from the fire extinguishing position immersed in the front panel 11a, and the immersion state is released in front of the face panel 11a, and the combustion position is do. In this combustion position, the fire extinguishing button 100 is rotatable, and it is possible to control the fire power within the range of a large fire to a small fire by rotating the fire extinguishing button 100 . Both the pressing operation and the rotating operation of the ignition button 100 are detected by the operation detection switch D shown in FIG. The detection signal output by the operation detection switch (D) is input to the controller (C).

When the power switch 9 is turned ON, an ON signal is input to the controller C, and the stove 1 starts operation. When the ignition operation is performed by the user pressing the ignition button 100 in the extinguishing position, the detection signal output from the operation detection switch (D) is input to the controller (C), and the controller (C) ignites the burner (13). control. In this ignition control, a high voltage is applied to the ignition electrode 7 by energizing the igniter 81 , and a spark is continuously generated in the ignition electrode 7 . Then, when the ignition button 100 for the grill 14 is pressed, the igniter 82 is energized. Next, the controller C outputs an open signal to the electromagnetic safety valve 5 and opens the electromagnetic safety valve 5 . Then, when ignition control of any one of the burners 13 is performed in a state where none of the burners 13 are burning, the one-valve 4 is also opened. Thereafter, the controller C gradually increases the opening degree of the flow rate control valve 6 so that the amount of fuel gas supplied to the burner 13 gradually increases, as shown in FIG. 3 .

As described above, in the ignition control of the burner 13 by the controller C, the opening degree of the flow control valve 6 is gradually increased during ignition control of the burner 13, so the amount of fuel gas supplied to the burner 13 is This gradually increases. Accordingly, even when the primary gas pressure fluctuates, the burner 13 is ignited where the amount of fuel gas supplied to the burner 13 reaches a predetermined ignitable amount. For this reason, it is possible to suppress the generation of a large spark accompanied by a loud ignition sound as in the prior art, and it is possible to obtain stable ignition performance without surprising the user. In this case, it is preferable to increase the opening degree of the flow control valve 6 at a constant ratio from the valve opening. And, where the thermocouple is heated by ignition and the electromotive voltage rises to a predetermined level, the ignition control is terminated, and the thermal power of the burner 13 is adjusted according to the rotation operation of the ignition button 100. Normal combustion move to control.

In addition, the controller C controls the opening degree of the flow rate control valve 6 during ignition control of the burner 13, and a predetermined opening degree capable of obtaining a predetermined amount of fuel gas capable of being ignited even under a condition in which the burner 13 is difficult to ignite. When it is increased to (θ _H ), it is programmed to maintain the opening degree of the flow control valve 6 at a predetermined opening degree (θ _H ) thereafter. For this reason, it can suppress that a flame|flame becomes large without anticipation until transfer to normal combustion control after ignition. And, as a condition that is difficult to ignite, for example, when the movement of air such as an updraft occurs around the stove 1 by operating the range hood of the system kitchen, etc., and wind occurs, the burner is caused by wind pressure. In (13), disturbance is generated in the fuel gas ejected from the flame hole, etc. are exemplified.

And, the controller (C), at the time of ignition control of the burner 13, the opening degree of the flow control valve 6, the burner 13 is stable and combustible from the opening degree (θ _L ) corresponding to the lower limit of the fuel gas amount programmed to increment. For this reason, it is possible to ignite the flow rate control valve 6 more quickly than when it is gradually opened from the fully closed state, and it becomes possible to reduce the time lag from the ignition operation to the ignition of the burner 13 . And, with respect to the opening degree of the flow control valve 6, there is a relationship of θ _H > θ _L , and the “amount of fuel gas at the lower limit in which the burner 13 is stable and combustible” refers to the degree to which the disturbance occurs in the fuel gas. It means the amount of fuel gas supplied to the extent that it cannot be digested by the breeze. In addition, the size of the opening degree (θ _H , θ _L ) can be appropriately set according to the thermal power performance of the burner 13, etc., and the relationship between the opening degree (θ _H , θ _L ) and the amount of fuel gas is based on the experience values up to this can be set appropriately.

And, when the ignition control by the controller C is not transferred to the normal combustion control between about 10 seconds from the start of the ignition operation in consideration of emergency cases such as gas leakage, it is determined that the ignition is faulty. it is preferable When judging that there is an ignition error, the controller C closes the electromagnetic safety valve 5 and, at the same time, notifies an error by a notification device provided in the stove 1 and not shown in the drawings. In addition, although the ignition control by the controller C is generally applied to the burners 13 of #1 to #3, it is possible to perform similarly also to the burners 13 of #4 for a grill.

Although the embodiment of the present invention has been described with reference to the drawings, the present invention is not limited to the above embodiment. Various forms are possible with respect to the configuration or structure of the burner, the type, configuration and structure of the flow control valve, and the configuration and structure of the controller.

1: stove 13: burner
3: Gas supply path 6: Flow control valve
7: ignition electrode 81, 82: igniter
C: Controller θ _H , θ _L : Opening degree of flow control valve (6)

Claims (3)

burner and
An ignition electrode attached to the burner and an igniter for applying a high voltage to the ignition electrode;
a gas supply path for supplying fuel gas to the burner;
An electric flow control valve that is opened in the gas supply path and increases or decreases the amount of fuel gas supplied to the burner by the increase or decrease of the opening degree;
A controller for controlling the igniter and the flow control valve is provided,
In the stove, the controller increases the opening degree of the flow control valve so that the amount of fuel gas supplied to the burner gradually increases after energizing the igniter during ignition control of the burner,
When the controller increases the opening degree of the flow control valve to a predetermined opening degree that can obtain a predetermined fuel gas amount that can be ignited even in a condition in which the burner is difficult to ignite during ignition control of the burner, thereafter, when the opening degree of the flow control valve is increased A stove characterized in that it is maintained in an open way.
delete delete

Images