JP2019007542A - Combustion gas quantity control device, and, driving method therefor - Google Patents

Abstract

To provide a combustion gas quantity control device capable of surely adjusting a flow rate of a combustion gas without electrifying a heavy current, and a driving method therefor.SOLUTION: A combustion gas quantity control device comprises: a magnetic substance piece 3 which is moved together with a diaphragm valve 2 from a valve closed state to a valve opened state; a gas passage 14a which consists of a gas exit 14 and passes a combustion gas that passes between a valve seat 1b and the diaphragm valve; a valve body for gas quantity adjustment (needle) 5 which is inserted into the gas exit while keeping a predetermined clearance with an inner peripheral surface of the gas exit and moved together with the diaphragm valve from the valve closed state to the valve opened state; a yoke 7 to which a coil 6 that is electrified to generate a magnetic field is externally fitted and sucked with the magnetic substance piece in an electromagnetic manner by electrifying the coil; a motor 8 which moves the yoke in a moving direction of the diaphragm valve from the valve closed state to the valve opened state; and energizing means (first energizing means) 11 for energizing the diaphragm valve from a valve opened state side to a valve closed state side.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a combustion gas amount control device used in a gas cooker and the like, and a driving method thereof.

  For example, in gas cookers such as gas stoves and gas grills, a combustion gas amount control device that controls the flow rate of combustion gas (fuel gas) is used to adjust the amount of heating during cooking.

  As one of such combustion gas amount control devices, Patent Document 1 discloses a suction coil for opening an electromagnetic valve from a closed state against a biasing force, and an electromagnetic valve opened by the suction coil. A gas solenoid valve having a holding coil that closes and holds the valve against an urging force is disclosed.

  In such a gas solenoid valve, when the valve is moved from the closed state to the open state against the closing bias force for keeping the solenoid valve closed, the suction valve is energized with a suction current. After the valve is opened and the solenoid valve is opened, the holding coil is energized with a holding current, and the solenoid valve is closed and held in the open state against the urging force.

  In general, the holding current is smaller than the suction current. When the solenoid valve is opened from the closed state, a large suction current is applied. After opening the valve, a small holding current is applied to the holding coil. Therefore, it is necessary to energize a large current when opening the solenoid valve from the closed state. However, after the solenoid valve is opened once, only a relatively small current as a holding current is energized. Since the electromagnetic valve can be held in the open state, it is possible to configure a gas device with low power consumption, which is meaningful.

Japanese Patent Publication No. 6-31645

  By the way, in a circuit that conducts a large current, if the contact resistance of a contact portion or the like in each part of the energization path in the circuit increases, a voltage drop due to the contact resistance increases, and in some cases, there may be a problem in circuit operation. There is.

Further, when a dry battery, particularly a manganese battery is used as a power source, there is a possibility that the internal resistance of the dry battery increases due to intermittently supplying a large current in a pulsed manner. Therefore, it is desirable to avoid intermittently supplying a large current in a pulsed manner as much as possible.
Therefore, the above-described conventional technology has room for improvement in these points.

  The present invention solves the above-described problems, does not require energization of a large current, can avoid inconveniences caused by energizing a large current, and is a combustion gas (fuel gas). An object of the present invention is to provide a combustion gas amount control device and a driving method thereof that can reliably adjust the flow rate.

In order to achieve the above object, the combustion gas amount control device of the present invention comprises:
A housing having a valve chamber, and a valve seat formed on the peripheral edge of the upstream region of the gas outlet provided on one end wall of the valve chamber;
A diaphragm valve disposed at a position facing the valve seat of the valve chamber;
A combustion gas amount control device comprising:
A magnetic piece that moves with the diaphragm valve from a closed state in which the diaphragm valve is in contact with the valve seat to an open state in which the diaphragm valve is separated from the valve seat;
A gas passage configured by the gas outlet and configured to pass the combustion gas that has passed between the valve seat and the diaphragm valve in the valve open state;
A gas amount adjusting valve element inserted into the gas outlet with a predetermined gap between the gas outlet and the inner peripheral surface, the valve opening state to the valve opening state. , A valve body for adjusting the amount of gas moving together with the diaphragm valve,
A yoke in which a coil that generates a magnetic field by energization is fitted, and a yoke that electromagnetically adsorbs to the magnetic piece by energizing the coil;
A motor that moves the yoke in the moving direction of the diaphragm valve from the closed state to the open state;
And an urging means for urging the diaphragm valve from the valve open state side to the valve close state side.

  Further, in the combustion gas amount control apparatus of the present invention, the second urging force urges the diaphragm valve from the valve closing state side to the valve opening state side against the urging force of the urging means. Preferably, it is provided with second urging means whose urging force is smaller than the urging force by the urging means.

Further, the driving method of the combustion gas amount control device of the present invention is:
A method for driving the above-described combustion gas amount control device of the present invention,
The valve closing state is shifted to the valve opening state by a valve opening command from the outside of the combustion gas amount control device, and the valve opening state from the valve opening state by the valve closing command from the outside of the combustion gas amount control device. When configured to transition to a closed state,
The diaphragm valve and the valve seat are in contact with each other and the magnetic piece and the yoke are in contact with each other until the valve opening command is issued when the combustion gas is shut off. It is characterized by being.

A combustion gas amount control device according to the present invention includes a casing having a valve chamber, and a valve seat formed on a peripheral edge of an upstream region of a gas outlet provided on one end wall of the valve chamber, Combustion gas amount control device comprising a diaphragm valve disposed at an opposing position, comprising a magnetic piece that moves with the diaphragm valve from a closed state to an open state, and a gas outlet. A gas passage for allowing the combustion gas that has passed between the valve seat and the diaphragm valve to pass through, and a gas amount adjusting valve body inserted into the gas outlet, from the closed state to the open state. The valve body for adjusting the amount of gas that moves together with the diaphragm valve, the coil that generates a magnetic field when energized, and the yoke that electromagnetically adsorbs to the magnetic material piece by energizing the coil are opened from the closed state. Diaphragm over valve condition Since it has a motor that moves the yoke in the moving direction of the valve and a biasing means that biases the diaphragm valve from the open state to the closed state, there is no need to energize a large current. It is possible to avoid the inconvenience caused by energizing a large current.
Further, it is possible to reliably adjust the flow rate of the combustion gas by driving the motor that switches between the flow state and the cut-off state of the combustion gas.

  That is, according to the present invention, in the valve-closed state, the yoke is moved by the motor so that the magnetic piece and the yoke are in contact with each other, and then the coil is energized to make the magnetic piece and the yoke electromagnetic. After the magnets are attracted to each other, the yoke that is attracting the magnetic pieces is moved by the motor so that the diaphragm valve shifts from the closed state to the open state. Like a solenoid valve, it is not necessary to apply a large current to the coil and attract the magnetic piece only by magnetic force in a state where the yoke and the magnetic piece are separated from each other.

  As a result, inconvenience caused by energizing a large current (for example, when the contact resistance at the contact portion increases, the voltage drop due to contact resistance increases, or when the dry battery (especially manganese battery) is used as a power source, It is possible to avoid the occurrence of inconveniences such as the internal resistance of the dry battery increasing by intermittently supplying a large current in a pulsed manner, resulting in troubles in circuit operation, etc., and highly reliable combustion A gas amount control device can be realized.

  Further, in the combustion gas amount control device of the present invention, second biasing means for biasing the diaphragm valve from the valve closing state side to the valve opening state side against the biasing force of the biasing means, When the urging force is provided with the second urging means that is smaller than the urging force by the urging means, the position of the gas amount adjusting valve element is stabilized when adjusting the flow rate of the combustion gas. As a result, it is possible to appropriately adjust the flow rate of the combustion gas, and the present invention can be implemented more effectively.

  Further, the driving method of the combustion gas amount control device of the present invention is such that when the combustion gas amount control device of the present invention described above is driven, the valve is in a closed state by a valve opening command from outside the combustion gas amount control device. The valve is opened in the combustion gas shut-off state when it is configured to shift to the valve open state, and from the valve open state to the valve closed state by a valve closing command from the outside of the combustion gas amount control device. Until the command is issued, the diaphragm valve and the valve seat are in contact with each other and the magnetic piece and the yoke are in contact with each other, so that the contact between the diaphragm valve and the valve seat is not It will be reliably maintained and reliability can be improved.

It is principal part sectional drawing which shows the structure of the combustion gas amount control apparatus concerning embodiment of this invention. It is principal part sectional drawing which shows the gas closed state at the time of adsorption | suction of a magnetic body piece (iron piece) of the combustion gas quantity control apparatus concerning embodiment of this invention. It is principal part sectional drawing which shows the gas flow state (The valve opening state through which combustion gas flows by a large flow rate) of the combustion gas quantity control apparatus concerning embodiment of this invention. It is principal part sectional drawing which shows the gas closed state at the time of magnetic substance piece (iron piece) detachment | leave of the combustion gas quantity control apparatus concerning embodiment of this invention. It is principal part sectional drawing which shows the gas flow state (The valve opening state through which combustion gas flows by a small flow rate) of the combustion gas amount control apparatus concerning embodiment of this invention.

  Hereinafter, the embodiment of the present invention will be shown and the features thereof will be described in more detail.

[Embodiment]
FIG. 1 is a cross-sectional view of an essential part showing a combustion gas amount control device A according to an embodiment of the present invention.

  The combustion gas amount control device A according to the present embodiment is used as a device for controlling the flow of combustion gas (fuel gas) serving as fuel for gas appliances such as gas stoves, gas grills, and gas water heaters. is there. A description will be given below.

As shown in FIG. 1, the combustion gas amount control apparatus A includes a casing 1 having a valve chamber 1 a, a valve seat 1 b, a gas inlet 4, and a gas outlet 14.
The gas inlet 4 is provided on the lower surface side of the housing 1, and the gas outlet 14 is provided on one end wall 1c of the valve chamber 1a. The valve seat 1 b is formed on the peripheral edge on the upstream side of the gas outlet 14.

  In addition, the casing 1 includes a diaphragm valve 2 disposed so as to face the valve seat 1b of the valve chamber 1a. A protective plate 22 for protecting the diaphragm valve 2 is disposed on one main surface side of the diaphragm valve 2, and a pressure receiving plate 23 for receiving a biasing force of a biasing means 11 described later is disposed on the other main surface side. Yes.

  Further, the combustion gas amount control device A moves together with the diaphragm valve 2 from the closed state in which the diaphragm valve 2 is in contact with the valve seat 1b to the open state in which the diaphragm valve 2 is separated from the valve seat 1b. A magnetic piece (iron piece) 3 is provided.

  The gas outlet 14 constitutes a gas passage 14a through which the combustion gas (fuel gas) that has passed between the valve seat 1b and the diaphragm valve 2 in the opened state is passed. That is, in the valve open state, the combustion gas that has passed between the valve seat 1b and the diaphragm valve 2 is supplied from the gas outlet 14 as the gas passage 14a to a gas appliance such as a gas stove, a gas grill, or a gas water heater. The

  In addition, the combustion gas amount control device A is a gas inserted into the gas outlet 14 (gas passage 14a) in such a manner that a predetermined gap exists between the gas outlet 14 (gas passage 14a) and the inner peripheral wall of the gas outlet 14 (gas passage 14a). An amount adjusting valve body (needle) 5 is provided.

  The gas amount adjusting valve element (needle) 5 is configured to move together with the diaphragm valve 2 from the closed state to the opened state.

  Further, the combustion gas amount control device A according to the present embodiment includes a yoke 7. The yoke 7 is fitted with a coil 6 that generates a magnetic field when energized. The coil 6 is energized through a power supply lead wire 6a.

  Further, the combustion gas amount control device A includes a motor 8 that moves the yoke 7 in the moving direction of the diaphragm valve 2 from the valve closing state to the valve opening state. In the present embodiment, a stepping motor is used as the motor 8.

  Further, the combustion gas amount control device A according to the present embodiment has a spring (first spring) as an urging means (first urging means) for urging the diaphragm valve 2 from the valve opening state side to the valve closing state side. ) 11.

  Furthermore, in this embodiment, the second urging means (which urges the diaphragm valve 2 from the valve closing state side to the valve opening state side) repels the urging force of the first urging means (first spring) 11. (Second spring) 12 is provided. As the second biasing means (second spring) 12, a biasing force smaller than the biasing force of the first biasing means (first spring) 11 is used.

  Further, as shown in FIG. 1, the housing 1 is provided with an integrated nut 10 connected to the yoke 7, and the nut 10 does not rotate with respect to the housing 1. It has been stopped.

  Further, a motor shaft 8a that is rotationally driven by the motor 8 is disposed in the housing 1, and the screw 21 formed on the multi-shaft 8a is screwed into the nut 10 and rotated. The nut 10 and the yoke 7 are configured to move in a predetermined direction, that is, the valve open state side and the valve close state side.

  In the combustion gas amount control apparatus A according to the present embodiment, in a valve-closed state, the yoke 7 is moved by the motor 8 to adsorb the magnetic body piece (iron piece) 3 and the yoke 7 to each other, and then the diaphragm valve To move the yoke 7 in a state where the magnetic body piece (iron piece) 3 is attracted to the valve open state side (right side in FIG. 1) by the motor 8 so that 2 moves from the valve closed state to the valve open state. As in the gas solenoid valve of Patent Document 1 described above, a large current is passed through the coil while the yoke and the magnetic piece are separated, and the magnetic piece is attracted only by magnetic force. It is not necessary to apply the electric current to the coil 6 so as to maintain the adsorption.

  As a result, inconvenience caused by energizing a large current (for example, when the contact resistance at the contact portion increases, the voltage drop due to contact resistance increases, or when the dry battery (especially manganese battery) is used as a power source, It is possible to avoid the occurrence of inconveniences such as the internal resistance of the dry battery increasing by intermittently supplying a large current in a pulsed manner, resulting in troubles in circuit operation, etc., and highly reliable combustion A gas amount control device can be realized.

  Further, in the combustion gas amount control apparatus A according to the present embodiment, the combustion gas flow rate is reliably and accurately adjusted by driving the motor 8 that switches between the combustion gas flow state and the cut-off state. be able to.

  Furthermore, in the combustion gas amount control apparatus A according to the present embodiment, as described above, the diaphragm valve 2 is moved to the closed state side by repelling the urging force of the first urging means (first spring) 11. Since the second urging means (second spring) 12 having a smaller urging force than the first urging means (first spring) 11 that urges the valve to the valve open state side is provided, the flow rate of the combustion gas Therefore, the position of the gas amount adjusting valve body (needle) 5 that moves together with the diaphragm valve 2 can be stabilized, and the flow rate of the combustion gas can be adjusted appropriately.

<Driving method of combustion gas amount control device>
Next, a driving method of the combustion gas amount control device A (FIG. 1) will be described.
When a valve opening command is issued from the outside of the combustion gas amount control device A, the combustion gas amount control device A according to the present embodiment shifts from the valve closing state to the valve opening state, and the combustion gas amount control device A When a valve closing command is issued from the outside of the control device A, the valve opening state is shifted to the valve closing state.

  In the combustion gas amount control device A according to the present embodiment, in the state where the combustion gas (fuel gas) is shut off, until the valve opening command is issued, as shown in FIG. And the valve seat 1b are in contact with each other, and the drive of the motor 8 is controlled so that the magnetic piece 3 and the yoke 7 are in contact with each other.

  In the state shown in FIG. 2, when a valve opening command is issued from the outside of the combustion gas amount control device A, the coil 6 is energized to electromagnetically connect the yoke 7 and the magnetic piece (iron piece) 3. Adsorb.

  Incidentally, the value of the energization current to the coil 6 for electromagnetically adsorbing the yoke 7 and the magnetic piece (iron piece) 3 maintains the state where the magnetic piece (iron piece) 3 and the yoke 7 are in contact with each other. Therefore, it is not necessary to energize a large current unlike the adsorption current in the prior art as disclosed in Patent Document 1.

  Note that the combustion gas amount control device A according to the present embodiment includes the nut 10 in the housing 1 disposed so as not to rotate with respect to the housing 1 as described above. Then, by rotating the motor 8 in the valve opening direction from the state shown in FIG. 2, the screw 21 formed on the motor shaft 8a is screwed into the nut 10, and the nut 10 is moved to the right as shown in FIG. The diaphragm valve 2 moves in the valve opening direction (right direction in FIG. 3) together with the magnetic piece (iron piece) 3 electromagnetically attracted to the yoke 7 connected to the nut 10. Then, the valve opens.

  FIG. 3 shows a valve open state where the gap between the inner peripheral surface 14b of the gas outlet 14 and the outer peripheral surface 5a of the gas amount adjusting valve element (needle) 5 is large, that is, the combustion gas is large. The valve opening state is shown in which flow is made at a flow rate.

  Then, from the valve open state shown in FIG. 3 (the state in which the combustion gas flows at a large flow rate), the motor 8 is rotated in the valve closing direction while the coil 6 is kept energized. As shown, the gap between the inner peripheral surface 14b of the gas outlet 14 and the outer peripheral surface 5a of the gas amount adjusting valve element (needle) 5 is small, that is, the valve opening in which combustion gas flows at a low flow rate. It becomes a state.

  That is, according to the combustion gas amount control apparatus A according to the present embodiment configured as described above, the motor 8 is rotated in the valve opening direction and the valve closing direction while the coil 6 is kept energized. Thus, the flow rate of the combustion gas flowing through the gas outlet 14 (gas passage 14a) can be adjusted from the large flow rate state shown in FIG. 3 to the small flow rate state shown in FIG.

  As described above, the combustion gas amount control device A of the present embodiment closes the diaphragm valve 2 against the urging force of the urging means (first urging means (first spring) 11). Since the urging force is biased from the state side to the valve-opening state side and the urging force is smaller than the urging force of the first urging means (first spring) 11, the second urging means (second spring) 12 is provided. When adjusting the flow rate of the combustion gas, the position of the gas amount adjusting valve body (needle) 5 that moves together with the diaphragm valve 2 is stabilized, so that the flow rate of the combustion gas can be adjusted more appropriately. It becomes possible to do.

  Further, in the valve open state shown in FIG. 3 or FIG. 5, when a valve closing command is issued from outside the combustion gas amount control device A, the coil 6 is first de-energized and the yoke 7 and Adsorption to the magnetic piece (iron piece) 3 cannot be maintained, and the urging force of the first urging means (first spring) 11 causes the diaphragm valve 2 to close together with the magnetic piece (iron piece) 3 in the valve closing direction (FIG. 3 or 5 (to the left in FIG. 5), the diaphragm valve 2 and the valve seat 1b come into contact with each other and the state of FIG. 4 is reached, and the flow of the combustion gas is blocked.

  In the combustion gas amount control device A according to the present embodiment, after reaching the state shown in FIG. 4, the motor 8 is rotated in the valve closing direction, and the yoke 7 is moved in the left direction in FIG. As shown in FIG. 2, the diaphragm valve 2 and the valve seat 1b are in contact with each other, and the magnetic piece (iron piece) 3 and the yoke 7 are in contact with each other.

  Then, in the state shown in FIG. 2, the power supply to the coil 6 is cut off until a valve opening command is issued from the outside of the combustion gas amount control device A.

  As a result, the diaphragm valve 2 and the valve seat 1b are in contact with each other and the magnetic piece (iron piece) 3 and the yoke 7 are in contact until the valve opening command is issued in the shut-off state of the combustion gas. Is reliably maintained, and reliability can be improved.

  As described above, by driving the combustion gas amount control device A by the method of the present invention, the combustion gas is reliably passed and blocked, and the combustion gas flow rate is reliably adjusted. Can do.

  However, the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention.

A Combustion gas amount control device 1 Case 1a Valve chamber 1b Valve seat 1c End wall on one side of case 2 Diaphragm valve 3 Magnetic piece (iron piece)
4 Gas inlet 5 Gas quantity adjusting valve (needle)
5a Outer surface of valve body (needle) for gas amount adjustment 6 Coil 6a Lead wire for energizing coil 7 Yoke 8 Motor 8a Motor shaft 10 Nut 11 Biasing means (first biasing means) (first spring)
12 Second urging means (second spring)
14 Gas outlet 14a Gas passage 14b Inner peripheral surface of gas outlet (gas passage) 21 Screw 22 Protection plate 23 Pressure receiving plate

Claims (3)

A housing having a valve chamber, and a valve seat formed on the peripheral edge of the upstream region of the gas outlet provided on one end wall of the valve chamber;
A diaphragm valve disposed at a position facing the valve seat of the valve chamber;
A combustion gas amount control device comprising:
A magnetic piece that moves with the diaphragm valve from a closed state in which the diaphragm valve is in contact with the valve seat to an open state in which the diaphragm valve is separated from the valve seat;
A gas passage configured by the gas outlet and configured to pass the combustion gas that has passed between the valve seat and the diaphragm valve in the valve open state;
A gas amount adjusting valve element inserted into the gas outlet with a predetermined gap between the gas outlet and the inner peripheral surface, the valve opening state to the valve opening state. , A valve body for adjusting the amount of gas moving together with the diaphragm valve,
A yoke in which a coil that generates a magnetic field by energization is fitted, and a yoke that electromagnetically adsorbs to the magnetic piece by energizing the coil;
A motor that moves the yoke in the moving direction of the diaphragm valve from the closed state to the open state;
A combustion gas amount control device comprising: an urging means for urging the diaphragm valve from the valve open state side to the valve close state side.   Repelling the urging force of the urging means, the second urging means for urging the diaphragm valve from the valve closing state side to the valve opening state side, the urging force being exerted by the urging means The combustion gas amount control device according to claim 1, further comprising a second urging means smaller than the urging force. A method for driving the combustion gas amount control device according to claim 1, comprising:
The valve closing state is shifted to the valve opening state by a valve opening command from the outside of the combustion gas amount control device, and the valve closing state from the valve opening state by the valve closing command from the outside of the combustion gas amount control device. When configured to transition to a valve state,
The diaphragm valve and the valve seat are in contact with each other and the magnetic piece and the yoke are in contact with each other until the valve opening command is issued when the combustion gas is shut off. A method for driving a combustion gas amount control device, characterized in that:

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