JPH0719451A - Device for regulating gas flow rate - Google Patents

Abstract

PURPOSE:To make a motor drive a needle valve by virtue of a simple constitution by designing a control circuit which turns on and off a burner according to, for example, manipulation of an ignition key and, when the burner fire is put out, causes the motor to drive the needle valve to the closing position. CONSTITUTION:A gas-flow-rate control valve has a gas passageway 17 one end 15 of which is connected to a main solenoid valve and the other end 16, to one of burners and in which a valve hole 18 is formed at an intermediate point; in the gas passageway 17 a needle valve 19 designed to be freely slid as a means of opening and closing the valve hole 18 is fitted at a position corresponding to the valve hole 18; as a means of at all times forcing the needle valve 19 toward the position of closure a spring 20 is provided. To the needle valve 19 a driving arm 21 is fixed, which is placed in contact with the cam surface 24 of a cam 23 rotated by a stepping motor 22; with rotational change of the position of the cam 23, the needle valve 19 is driven to and from the valve hole 18 so as to adjust the degree of opening of the valve hole 18. This constitution enables remodeling the driving mechanism of the needle valve 19 into a motor drive by a relatively simple alteration in design.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas amount controller for adjusting the amount of gas supplied to a burner with a needle valve.

[0002]

2. Description of the Related Art In the case of adjusting a relatively small amount of gas such as a burner for a stove, for example, an actual open sho 63-1667.
The amount of gas supplied to the burner and the like is adjusted using a needle type valve shown in Japanese Patent Publication No. 80, etc. In the case of this type of needle valve, a lubricant is used to smoothly move the valve. Therefore, for example, if the valve is left in the fully open position for a long time in a relatively low temperature state, the lubricant adhered to the periphery of the valve is apt to adhere, and the driving force of the motor becomes Although it may be configured so that both the closing directions are given, there is a problem that the cost increases due to an increase in the number of parts.

[0003]

SUMMARY OF THE INVENTION It is an object of the present invention to drive a needle valve with a motor having a relatively simple structure.

[0004]

According to the present invention, a needle valve is provided in a gas passage for supplying gas fuel to a burner, and the needle valve is always urged in a closing direction by a spring. A cam that opens and closes by a combination with a spring, a motor that drives this cam, and a control circuit that controls the motor and the like to blink the burner are provided, and this control circuit is used to operate the ignition key and the like. Accordingly, the burner is configured to blink, and the motor is driven to the closed position of the needle valve when the burner is extinguished.

According to the present invention, the control circuit drives the motor to the fully open position of the needle valve during the reception time for detecting the operation of the ignition key when the operation of the ignition key is detected and the burner is ignited. It is composed of.

[0006]

[Operation] During ignition operation of the burner, the control circuit detects this by operating the ignition key, and drives the motor during the ignition key reception time to drive the needle valve to the fully open position to activate the burner. The gas is supplied and the igniter is operated to perform the ignition operation.

When the fire is extinguished, the control circuit detects this by operating the ignition key or the fire extinguishing key, and operates the motor to drive the needle valve to the closed position.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described first with reference to FIG. 1. (1) is a cooker body, for example, a left stove (3) equipped with a burner (2) of standard thermal power on the upper surface, A right stove (5) equipped with a burner (4) and a heat retaining stove (7) equipped with a heat retaining burner (6) are arranged, and a grill (8) is incorporated on the left inside, and the right front On the operation panel
I am wearing (9).

On the other hand, each of the burners (2), (4) and (6) has a structure shown in FIG.
As shown in, the gas flow path (10) is provided with the original solenoid valve (11), the downstream of this original solenoid valve is branched to provide the branch passages (12), (12), (12) and (12). Gas amount control valve (13) (13) (13) in each branch passage
(13) is provided, and the burners (2) above are provided downstream of these control valves.
(4) It is connected to (6) and the grill burner (14).

The gas amount control valve (13) ...
As shown in, one end (15) is the above solenoid valve (11), the other end (16)
Is formed with a valve hole (18) in the middle of a gas flow path (17) communicating with any of the burners (2), (4), (6) and (14), and the valve hole (18) is located opposite to this valve hole. A needle valve (19) that opens and closes is slidably mounted, and a spring (20) that constantly biases the needle valve in the closing direction is provided.

A drive arm (21) is attached to the needle valve (19).
Fixed to the stepping motor (2
2) It comes into contact with the cam surface (24) of the cam (23) which is rotated, and drives the needle valve (19) from the valve hole (18) depending on the rotational position of the cam (23) to move the valve hole It is configured to adjust the aperture of (18).

Further, at the lower end of the operation panel (9), as shown in FIG. 4, the grill operation part (2) for the grill (8) is provided at the left end thereof.
5), on the right side, left stove operating part (26) for the left stove (3),
Furthermore, on the right side of the right stove operation unit (27) for the right stove (5),
A warming stove operating section (28) for the warming stove (7) is arranged at the right end.

Further, the grill operating portion (25) has, for example, 3
Menu key to select and set the type of automatic cooking (29) (29) (2
9) and a pair of timer keys (30) (30) for setting the cooking time
, And the heating power adjustment key (3
1) (31) (31) and ignition / fire extinguishing key to perform ignition or fire extinguishing operation
(32) is provided.

As with the grill operating section (25), the left stove operating section (26) selects a pair of timer keys (33) and (33), an ignition / fire extinguishing key (34), and fried food such as tempura. A tempura key (35), a water heater key (36) for selecting the water heater, a heat control knob (37) for setting the heat power by rotating operation, and a right stove operation part (27) and a heat-retaining stove operation part ( 28)
Ignition / fire extinguishing keys (38) (39) and heat power adjusting keys (40) (41) are provided respectively.

FIG. 5 is a block diagram of the control means (42) for performing the blinking operation of each burner (2) (4) (6) based on the operation of each key arranged on the operation panel (9). , For example, the input of the control circuit (43) composed of a microcomputer, the ignition / extinguishing keys (32) (34) (38) (39), menu key (29), hot water key (36)
, Etc., and the heating power setting detection circuit (44) that detects the set heating power from the rotational position of the heating power adjustment knobs (37) (40) (41), etc. are connected, and the output is the gas amount control valve ( 13) ··· Stepping motors 1 to 4 (22) · · The thermal power control motor drive circuit (45) for driving, the original solenoid valve (11), an igniter (not shown), etc. are controlled to control the burners (2). ) (4) (6) (14) is connected to a burner control circuit (46) for controlling blinking.

When the burners (2), (4), (6) and (14) are blinking, one of the ignition / extinguishing keys (32) (34) is operated at step S1 as shown in FIG. ) (38) (39) is turned on, the process proceeds to step S2, the control circuit (43) detects this, and drives the corresponding stepping motor (22) .. In the above ignition / extinguishing key (3
2) When a predetermined reception time (for example, 0.7 seconds) of (34) (38) (39) elapses, the process proceeds to step S4, and the heating power adjustment keys (37) (4)
0) (41), etc.
2).

Then, in step S5, the ignition / extinction key (3
2) When the OFF operation of (34) (38) (39) is detected, step S
Proceeding to step 6, the stepping motors (22) ... Are driven to the low heat position and the original solenoid valve (11) is closed.

Although omitted in the above embodiment, the ignition / extinguishing keys (32), (34), (38) and (39) OF are opened in step S5.
Even if the F operation is detected, if there is another burning burner, the original solenoid valve (11) is not closed in step S6.

In the above embodiment, the burners (2) (4) (6) (1
The flashing operation of 4) is configured to be performed by the ignition / extinguishing keys (32) (34) (38) (39), but it is also possible to provide an ignition key and a fire extinguishing key. good.

[0020]

With the structure according to the present invention, for example, a needle valve which has conventionally been manually operated can be changed to a motor drive by a relatively simple design change, and a lubricant that adheres to the needle valve at a low temperature or the like can be obtained. The malfunction of the valve due to the sticking can be surely prevented by the program setting of the microcomputer, for example.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment using the present invention.

FIG. 2 is a schematic view of a gas flow path showing an embodiment using the present invention.

FIG. 3 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 4 is a plan view showing an embodiment of the present invention.

FIG. 5 is a block diagram showing an embodiment of the present invention.

FIG. 6 is a flowchart showing an example of the present invention.

[Explanation of symbols]

 2 Burner 4 Burner 6 Heat insulation burner 10 Gas flow path 19 Needle valve 20 Spring 22 Stepping motor 32 Ignition / fire key 34 Ignition / fire key 38 Ignition / fire key 39 Ignition / fire key 43 Control circuit

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Mitsuaki Tabuchi 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Tottori Sanyo Electric Co., Ltd.

Claims (2)

[Claims] 1. A needle valve is provided in a gas flow path for supplying a gas fuel to a burner, and the needle valve is always biased by a spring in a closing direction. The needle valve is opened and closed by a combination with a spring. A cam for driving, a motor for driving this cam, and a control circuit for controlling the motor and the like to perform the blinking operation of the burner are provided. The control circuit is provided to blink the burner according to the operation of an ignition key or the like. And a gas amount control device configured to drive the motor to the closed position of the needle valve when the burner is extinguished. 2. The control circuit drives the motor to the fully open position of the needle valve during a reception time period for detecting the operation of the ignition key when the operation of the ignition key is detected and the burner is ignited. The gas amount adjusting device according to claim 1, wherein the gas amount adjusting device is configured to: