KR20190065120A - Gas Range - Google Patents

Abstract

The present invention provides a cooking stove capable of obtaining stable ignition performance without troubling an operator even when a primary gas pressure fluctuates. According to the present invention, the cooking stove comprises: a burner (13); an igniter (81, 92) for applying a high voltage to an ignition electrode (7) and an ignition electrode attached to the burner; a gas supply passage (3) for supplying a fuel gas to the burner; an electric flow rate control valve (6) installed on the gas supply passage, and increasing and decreasing an amount of the fuel gas supplied to the burner by the increase or decrease of an opening degree; and a controller (C) for controlling the igniter and the flow rate control valve. The controller increases the opening degree of the flow rate control valve so as to gradually increase an amount of the fuel gas to be supplied to the burner after energizing with the igniter when controlling an ignition of the burner.

Description

Gas Range {Gas Range}

The present invention relates to a burner comprising a burner, an ignition electrode attached to the burner, an igniter for applying a high voltage to the ignition electrode, a gas supply passage for supplying fuel gas to the burner, An electric flow rate regulating valve for increasing or decreasing the amount of fuel gas supplied to the burner by an increase or decrease, and a controller for controlling the igniter and the flow rate regulating valve.

Conventionally, during the ignition control of this type of stove burner, the opening degree of the flow rate control valve is made to be energized (energized) by ignition while keeping the amount of the fuel gas supplied to the burner at the opening degree at which the gas amount becomes the predetermined ignition gas amount (See, for example, Patent Document 1).

Since the electrically operated flow rate regulating valve is used in the furnace, the amount of the fuel gas is increased or decreased in accordance with the fluctuation of the primary gas pressure, unlike the gas appliance using the proportional valve with the governor in which the amount of combustion gas does not fluctuate even if the primary gas pressure fluctuates. However, when the primary gas pressure is high, the amount of the fuel gas at the time of ignition control becomes large, and a large flame is generated at the moment of ignition when the primary gas pressure is high so that the primary gas pressure can be reliably ignited even if the primary gas pressure is low. And it also surprises the user because it also accompanies big dashes.

JP 2013-204846 A

SUMMARY OF THE INVENTION In view of the above, it is an object of the present invention to provide a furnace capable of obtaining a stable ignition performance without causing a user to be surprised even when the primary gas pressure fluctuates.

According to an aspect of the present invention, there is provided a burner comprising a burner, an ignition electrode attached to the burner, an igniter for applying a high voltage to the ignition electrode, a gas supply passage for supplying fuel gas to the burner, An electric flow rate control valve for increasing or decreasing the amount of fuel gas supplied to the burner by increasing or decreasing the degree of opening of the burner, and a controller for controlling the igniter and the flow rate control valve. In the furnace, And the opening degree of the flow rate control valve is increased so that the amount of the fuel gas supplied to the burner gradually increases after the energization with the igniter.

According to the present invention, since the opening degree of the flow control valve is gradually increased in the ignition control of the burner, the amount of the fuel gas supplied to the burner gradually increases. Therefore, the burner is ignited at a different amount of the fuel gas supplied to the burner in which the primary gas pressure fluctuates from a predetermined amount that can be ignited. As a result, it is possible to suppress the occurrence of large sparks accompanied by a large-scale tone sound as in the conventional art, and stable ignition performance can be obtained without causing the user to be surprised.

In the present invention, when the burner ignition control is performed, the controller increases the opening degree of the flow rate control valve to a predetermined degree at which a predetermined amount of fuel gas capable of ignition can be obtained even under a condition where the burner is difficult to ignite, Is maintained at the predetermined degree. In this case, it is possible to suppress the unexpected increase in the flame from the ignition to the normal combustion control.

Further, in the present invention, the controller preferably increases the opening degree of the flow rate control valve from the degree of opening corresponding to the lower limit fuel gas amount at which the burner can be stably burned at the time of controlling the ignition of the burner. In this case, the flow control valve can be ignited faster than when the flow control valve is opened slowly, and it is possible to reduce the time lag from the ignition operation to the ignition of the burner.

Even when the primary gas pressure varies, it is possible to obtain a stable ignition performance without causing the operator to be surprised.

A burner, an igniter attached to the burner, an igniter for applying a high voltage to the ignition electrode, a gas supply passage for supplying fuel gas to the burner, And a controller for controlling the igniter and the flow rate regulating valve. The controller controls the flow rate of the fuel gas supplied to the burner to gradually increase after the energization of the igniter is performed during the control of the ignition of the burner. Increase valve opening.

1 is a schematic perspective view showing one embodiment of a furnace of the present invention.
2 is a circuit diagram showing a gas circuit of the furnace shown in Fig.
Fig. 3 is a graph showing the relationship between the opening-time of the flow control valve relating to the ignition control by the controller shown in Fig. 2;

The furnace 1 shown in Fig. 1 is a built-in recognition incorporated in a system kitchen in which the drawings are omitted. The furnace 1 is provided with a furnace body 11 provided so as to enter an opening provided in a counter top of the system kitchen and a top plate 12 placed on the counter top so as to cover the upper surface of the furnace body 11 Three burners 13 in total of # 1 on the front side, # 2 on the front side and # 3 on the rear side, and a grill 14 embedded in the stove body 11, which are exposed on the top plate 12, Respectively. The burner 13 heats the object to be cooked (not shown) such as a pot placed on the container base 2 placed on the top plate 12 so as to surround the burner 13.

2, the gas supply path 3 for the furnace 1 is constituted by three burners 13 of # 1 to # 3 shown in FIG. 1 and a plurality of burners 13 of the grill 14 And the fuel gas is supplied to the burner 13 of # 4 which heats the object to be cooked. The original valve 4 is provided on the upstream side of the gas supply path 3 and the gas supply path 3 is branched from the downstream side of the original valve 4 to the four branch paths 3a And each branch path 3a is connected to each one of the four burners 13. [0034] An electromagnetic safety valve 5 and an electric flow rate control valve 6 are provided in each branch passage 3a. The flow control valve 6 is disposed on the downstream side of the branch passage 3a with respect to the electromagnetic safety valve 5. [ Each flow control valve 6 is of the electric type driven by the motor M to adjust its opening degree. The amount of the fuel gas supplied to the burner 13 through the branch passage 3a is increased or decreased by increasing or decreasing the opening degree of the valve body of the flow rate control valve 6. [ The flow rate control valve 6 may be a valve having a needle valve body that moves in the axial direction through a feed screw mechanism by driving of the motor M or a needle valve body which rotates by the rotation of the motor M A valve having a rotary valve body can be used.

Each burner 13 is provided with an ignition electrode 7, and a thermocouple for flame detection (not shown) is also provided. The furnace 1 is provided with an igniter 81 for applying a high voltage to the ignition electrode 7 attached to the burners 13 of # 1 to # 3 and an igniter 81 for applying a high voltage to the ignition electrode 7 attached to the burner 13 of # And an igniter 82 for applying a high voltage to the motor 7 is provided. In the furnace 1, the controller C controls the original valve 4, the electronic safety valve 5, the motor M of the flow rate control valve 6 and the igniters 81 and 82. The controller C is, for example, a microcomputer.

1, a power control switch 9 is provided on the front panel 11a of the stove body 11, one for each of # 1 to # 4 of the burner 13, (# 1 to # 4) are also provided. Each of the ignition buttons 100 is of a push-push type and is released from the immersed state by the user's pressing operation from the extinguishing position immersed in the front panel 11a, protruded forward of the surface panel 11a, do. In this combustion position, the ignition button 100 is rotatable, and the turning control of the ignition button 100 enables the control of the fire power within the range of a large fire to a small fire. Both the depressing operation and the depressing operation of the depressurization button 100 are detected by the operation detection switch D shown in Fig. The detection signal output from 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 furnace 1 starts operating. The detection signal outputted from the operation detection switch D is inputted to the controller C and the controller C is switched to the ignition state of the burner 13 in response to the ignition operation of the ignition button 100, Control is performed. In this ignition control, a high voltage is applied to the ignition electrode 7 by energizing the igniter 81, and a spark is generated continuously to the ignition electrode 7. When the ignition button 100 for the grill 14 is depressed, the igniter 82 is energized. Subsequently, the controller C outputs an opening signal to the electronic safety valve 5 and opens the electronic safety valve 5. Then, When the ignition control of any one of the burners 13 is carried out in a state in which none of the burners 13 is burned, the original valve 4 is also changed. Thereafter, as shown in Fig. 3, the controller C gradually increases the opening degree of the flow control valve 6 so that the amount of the fuel gas supplied to the burner 13 gradually increases.

As described above, in the ignition control of the burner 13 by the controller C, since the opening degree of the flow control valve 6 is gradually increased during the ignition control of the burner 13, the amount of fuel gas supplied to the burner 13 This gradually increases. Therefore, even when the primary gas pressure fluctuates, the amount of the fuel gas supplied to the burner 13 is ignited in the burner 13 at a different amount from the predetermined amount that can be ignited. Therefore, it is possible to suppress the generation of large sparks accompanied by large-scale tone sounds as in the conventional art, and stable ignition performance can be obtained without causing the user to be surprised. In this case, it is preferable that the opening degree of the flow control valve 6 is increased at a constant rate from the valve opening. The ignition control is terminated when the thermocouple is heated by the ignition and the ignition voltage is raised to a predetermined level. The ignition control is ended and the normal combustion is performed in which the thermal power of the burner 13 is adjusted in accordance with the turning operation of the ignition button 100 Control.

The controller C also controls the opening degree of the flow rate control valve 6 so that the amount of the predetermined fuel gas which can be ignited is obtained even under the condition that the burner 13 is difficult to ignite at the time of the ignition control of the burner 13. [ there is increased to (θ _H), is programmed so that after maintaining the opening degree of the flow control valve 6 to a predetermined opening degree (θ _H). Therefore, it is possible to prevent the flame from becoming large without being expected until the transition to the normal combustion control after the ignition. As conditions under which it is difficult to ignite, for example, when a movement of air such as a rising air current occurs in the vicinity of the furnace 1 by, for example, operating a range hood of the system kitchen, and winds are generated, And disturbance is generated in the fuel gas ejected from the air hole of the combustion chamber 13.

The controller C controls the opening degree of the flow rate control valve 6 from the opening degree &thetas; _L corresponding to the lower limit fuel gas amount at which the burner 13 can be stably burned at the time of the ignition control of the burner 13 . Therefore, the flow rate control valve 6 can be ignited more quickly than when the flow rate regulating valve 6 is gradually opened from the fully closed state, and the time lag from the ignition operation to the ignition of the burner 13 can be reduced. The opening degree of the flow control valve 6 is in the relationship of? _H >? _L , and the "amount of the fuel gas at the lower limit at which the burner 13 is stable and combustible" means that the disturbance The amount of fuel gas supplied is such that it is not extinguished by the breeze. In addition, the opening size, can be appropriately set depending on the thermal performance of the burner 13, the opening degree of relationship (θ _H, θ _L) and the amount of fuel gas in (θ _H, θ _L) is, according to experience to this And can be appropriately set.

Then, the ignition control by the controller C is judged to be an ignition failure when the normal combustion control is not performed within about 10 seconds from the start of the ignition operation in consideration of an emergency such as gas leakage . The controller C closes the electronic safety valve 5 and at the same time performs an error notification by a notifying device provided in the furnace 1 that omits the illustration. The ignition control by the controller C is generally applied to the burners 13 of # 1 to # 3, but it is also possible to apply the same to the burners 13 of the burner # 4.

Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to the above embodiments. The configuration and structure of the burner, the type, composition and structure of the flow rate control valve, the structure and structure of the controller, and the like are possible.

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

Claims (3)

The 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 a fuel gas to the burner,
An electric flow rate control valve provided in the gas supply passage for increasing or decreasing the amount of fuel gas supplied to the burner by increasing or decreasing the opening degree,
In a furnace having a controller for controlling an igniter and a flow rate control valve,
Wherein the controller increases the opening degree of the flow control valve so that the amount of the fuel gas supplied to the burner gradually increases after the igniter is energized in the ignition control of the burner. The method according to claim 1,
The controller increases the opening degree of the flow rate control valve to a predetermined degree at which a predetermined amount of fuel gas capable of ignition can be obtained even under a condition that the burner is difficult to ignite at the time of controlling the ignition of the burner, Is kept at an opening degree. 3. The method according to claim 1 or 2,
Wherein the controller increases the opening degree of the flow rate control valve from the degree of opening corresponding to the lower limit of the fuel gas amount at which the burner can be stably burned at the time of ignition control of the burner.

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