HK1062324A1 - Gas controller - Google Patents

Abstract

When a gas burner is operated to ignite, a gas control device having an annular fire power adjustment dial installed around an ON/OFF button is moved together with the press-in operation of the ON/OFF button to force the fire power adjustment dial to rotate toward the strong fire side, which may, in the valve-opening position, adversely affect the operability of the fire power adjustment dial for the operator. The gas control device of this invention can perform an ignition operation by a press-in operation of an ON/OFF button (5) from a valve-closing position to a valve-opening position. A forcing rotation apparatus (51) is provided to be moved together with and force a fire power adjustment dial (7) to rotate in order to enable the fire power of the gas burner to become a predetermined fire power. The forcing rotation is ended before the ON/OFF button reaches the valve-opening position. In addition, in the valve-opening position, the retention between the ON/OFF button and the fire power adjustment dial due to the forcing rotation apparatus can be released.

Description

Gas control device

Technical Field

The present invention relates to a gas control device that controls supply of fuel gas to a gas burner provided in a gas range, for example.

Background

Such a gas control device is disclosed in, for example, japanese patent No. 2742356. The device includes, for example, an ignition and extinguishing button provided on a front panel of a gas range and movable in a front-rear direction, and a valve opening position for opening a gas passage connected to a gas burner, an ignition position for operating an ignition device of the gas burner, and a valve closing position for closing the gas passage are provided at 3 positions different in the front-rear direction of the ignition and extinguishing button.

When the ON/OFF button is pressed at the OFF position, the ON/OFF button is moved to the ignition position to open the gas passage and actuate the ignition mechanism of the gas burner. When the pressing of the ignition/extinguishing button is released after the ignition of the gas burner is confirmed, the ignition/extinguishing button is protruded to move to the valve opening position.

In the valve-opening position, the heating power of the gas burner is adjusted by an annular heating power adjusting knob provided around the on/off fire button. Firepower adjust knob and flow regulator linkage, this flow regulator set up in the gas passageway, adjust the gaseous gas flow of fuel who supplies with the gas burner through the open area who changes the gas passageway.

When the gas burner is stopped, the ignition and extinguishing button in the valve opening position is pushed to move to the valve closing position, the gas passage is closed, and the gas burner is extinguished.

Here, in order to reliably ignite the fuel gas at the time of the ignition operation of the gas burner, it is preferable to supply the fuel gas into the mixing pipe of the gas burner so that the heating power of the gas burner is, for example, in a strong or moderate state.

Therefore, the above-described device is provided with a reset device which forcibly rotates the heating power adjustment knob to a position where the heating power of the gas burner is strong in conjunction with the push operation of the ignition button when the gas burner is extinguished.

The device is provided with the reset mechanism, so that the fire power adjusting knob cannot rotate at the position of the fire extinguishing button for closing the valve.

Therefore, the following technical means are provided. That is, when the point fire extinguishing button is pressed, the fire power adjustment knob is forcibly rotated by, for example, a forced rotation mechanism using a cam mechanism so that the fire power of the gas burner is strong or moderate, and the fire power adjustment knob is freely rotated at the off-valve position of the point fire extinguishing button.

However, if only the forced rotation mechanism is provided, when the heating power is adjusted by rotating the heating power adjustment knob at the valve opening position, the heating power adjustment knob may be deteriorated in operability when the forced rotation mechanism is in the engaged state, and the feeling of the rotation operation of the cooker may be adversely affected.

Disclosure of Invention

In view of the above, an object of the present invention is to provide a gas control device that does not affect the sense of rotation operation when the heating power is adjusted at the valve opening position of the gas burner.

In order to solve the above problems, a gas control device of the present invention includes an ignition and extinguishing button movable in a front-rear direction, a closed valve position for closing a gas passage connected to a gas burner and a valve opening position for keeping the gas passage open, and a ring-shaped heating power adjusting knob capable of adjusting heating power by adjusting a supply amount of fuel gas to the gas burner is provided around the ignition and extinguishing button, wherein an ignition operation is configured to be moved from the closed valve position to the valve opening position by a pressing operation of the ignition and extinguishing button, and a forced rotation mechanism is provided to forcibly rotate the heating power adjusting knob to change the heating power of the gas burner to predetermined heating power in conjunction with the pressing operation of the ignition and extinguishing button from the closed valve position to the valve opening position, the forced rotation of the fire power adjustment knob by the forced rotation mechanism is completed before the fire ignition button reaches the valve opening position, and the engagement relationship between the fire ignition button and the fire power adjustment knob by the forced rotation mechanism is released at the valve opening position.

In the present invention, when an operation point fire extinguishing button is pushed from a closed position to perform an ignition operation, a gas passage is opened and fuel gas flows into a gas burner. In this case, the fire power adjustment knob is rotated by the forced rotation mechanism. When the ignition operation is finished, the ignition/extinguishing button reaches the valve-opening position. At this time, the fire power adjusting knob is already rotated to a predetermined position, and the gas passage can be kept open.

When the fire power adjusting knob is rotated at the valve opening position of the fire extinguishing button, the fuel gas flow rate of the fuel gas supplied to the gas burner is increased or decreased to adjust the fire power of the gas burner. In this case, the engagement between the fire ignition button and the fire power adjustment knob by the forced rotation mechanism is already released, so that the operability of the fire power adjustment knob is not impaired, and the sense of rotation operation of the cooker is not adversely affected.

When the fire extinguishing button is operated to move from the valve-open position to the valve-closed position in order to extinguish the fire of the gas burner, the gas passage is closed, and the supply of the fuel gas to the gas burner is stopped.

Here, the forced rotation mechanism may be constituted by, for example, a projection piece fitted in a radial hole provided in an outer peripheral surface of the ignition button in a state of being biased outward, and a cam groove provided in an inner peripheral surface of the fire power adjustment knob, and the projection piece may be accommodated in the hole and separated from the cam groove as the ignition button moves from the off position to the open position, and the projection piece may not be engaged with the cam groove in the open position.

As described above, the gas control device according to the present invention has the effect of preventing adverse effects on the sense of rotation operation of the cooking person without impairing the operability of the heating power adjustment knob.

Brief description of the drawings

Fig. 1 is a perspective view showing a gas range equipped with a gas control device of the present invention.

Fig. 2 is a sectional view showing the gas control apparatus of the present invention in the closed position.

Fig. 3(a) is a diagram illustrating the position of the fire power adjustment knob with respect to the fire extinguishing button when the gas burner is in a weak fire state. (b) The figure is a diagram illustrating the position of the rotating body when the gas burner is in a weak fire.

Fig. 4 is an exploded perspective view illustrating the construction of the fire extinguishing button and the fire power adjusting knob.

Fig. 5(a) to (d) are views illustrating the position of the 1 st projection of the fire extinguishing button with respect to the fire power adjusting knob.

Fig. 6(a) to (e) are views for explaining the rotational position of the rotary body at the valve opening position and the position of the 2 nd projecting piece with respect to the heating power adjustment knob.

Fig. 7 is an explanatory diagram of forced rotation of the fire power adjustment knob at the time of ignition operation.

Fig. 8 is a sectional view showing the gas control device of the present invention in the ignition position.

Fig. 9 is a sectional view showing the gas control device of the present invention in the valve open position.

Fig. 10(a) is a diagram of the position of the fire power adjustment knob with respect to the fire extinguishing button when the gas burner is on a strong fire. (b) The figure is a diagram illustrating the position of the rotating body when the gas burner is in a strong fire.

Fig. 11(a) is a diagram of the position of the fire power adjustment knob with respect to the fire extinguishing button when the gas burner is on a medium fire. (b) The figure is a diagram illustrating the position of the rotating body when the gas burner is in the middle fire.

Fig. 12(a) is a diagram of the position of the fire power adjustment knob with respect to the fire extinguishing button when the gas burner is on a small fire. (b) The figure is a diagram illustrating the position of the rotating body when the gas burner is on a small fire.

Fig. 13 is a diagram illustrating a modification of the forced rotation of the fire power adjustment knob at the time of the ignition operation.

Detailed Description

Referring to fig. 1, a gas control device 1 is incorporated in a gas range 2, for example. In this case, the gas range 2 has a box-shaped range body 21, and 2 gas burners 23a, 23b are provided in the range body 21, and face 2 openings provided in a panel 22 covering the upper surface of the range body 21.

The range body 21 is further provided therein with a grill 25 which is positioned between front panels 24 provided at both ends of the front of the range body 21, and a ceramic plate type gas burner (not shown). The gas control device 1 of the present invention can control the supply of the fuel gas to the 2 gas burners 23a and 23b and the ceramic plate gas burner.

Referring to fig. 2, the gas control device 1 has a valve housing composed of 2 parts 11a and 11b connected to each other in an overlapping manner. In the 1 st part 11a of the valve housing located on the lower side, a 1 st internal passage 12a extending in the longitudinal direction of the valve housing is provided, and a gas inflow portion 13 communicating with the 1 st internal passage 12a is opened.

The solenoid valve 3 is provided in the 1 st internal passage 12a on the downstream side of the gas inflow portion 13. The solenoid valve 3 has a magnet case 31, and an electromagnet excited by a signal from a control unit (not shown) provided in the cooker body 21 and an attraction piece attracted by the electromagnet are accommodated in the magnet case 31.

The 1 st valve element 32 protruding from the magnet housing 31 to the downstream side of the 1 st internal passage 12a is connected to the adsorption sheet. In the closed state of the electromagnetic valve 3, the 1 st valve element 32 is seated on the valve seat of the valve seat member 34 provided in the 1 st internal passage 12a by the urging force of the spring 33 interposed between the 1 st valve element 32 and the magnet housing 31 via the seal material 34 a.

The valve opening operation of the solenoid valve 3 is performed by an operating rod 4 inserted into the 1 st internal passage 12a via a sealing material 41 and movable forward and backward in the longitudinal direction of the 1 st internal passage 12 a. Further, a 2 nd valve element 42 is provided on the operating rod 4, and the 2 nd valve element 42 constitutes a main valve together with a valve seat 43 provided in the 1 st internal passage 12 a. In the main valve-closed state, the 2 nd valve element 42 is seated on the valve seat 43 by the spring 44 interposed between the 2 nd valve element 42 and the valve seat member 34.

The operation lever 4 is moved in the front-rear direction by a push operation of the ignition and extinguishing button 5 protruding from the front panel 24 (see fig. 1). The ignition and extinguishing button 5 is formed in a cylindrical shape, and a pressing rod 5a that presses the operation rod 4 in accordance with the movement of the ignition and extinguishing button 5 is connected to the end surface on the 1 st internal passage 12a side.

Further, one end of the pressing rod 5a is connected to a heart-shaped cam mechanism 5b provided on the lower side of the 1 st portion 11 a. In this case, when the operating point fire extinguishing button 5 is pressed in order to perform an ignition operation from a closed valve position (a state shown in fig. 1) for closing the 1 st internal passage 12a while protruding from a front end surface of a fire power adjustment knob described later, the operating lever 4 is pressed backward (rightward in fig. 2) by the pressing lever 5a to open the main valve, and then the discharge unit (not shown) as an ignition device is moved to an operating ignition position while pushing the valve body 32 to the suction piece side.

When the pressing of the fire extinguishing button 5 is released at the ignition position, the main valve is guided by the heart-shaped cam mechanism 5b to move forward (left side in fig. 2) and is kept open, and reaches a valve opening position where the 1 st internal passage 12a is opened. When the fire extinguishing button 5 is further pushed from the valve opening position to perform the fire extinguishing operation, the heart cam mechanism 5b is reset to return to the fire extinguishing position.

Further, a gas outflow port 14 is provided in the 1 st portion 11a at the upstream side of the main valve, the gas outflow port 14 coincides with one end of a 2 nd inner passage 12b of a substantially L-shape provided in the 2 nd portion 11b, and the inner passages 12a and 12b of the 1 st and 2 nd portions constitute a gas passage.

On the outer peripheral surface of the 2 nd portion 11b, 4 communication passages 15a, 15b, 15c, and 15d of the 1 st, 2 nd, 3 rd, and 4 th are provided at predetermined intervals and spaced from each other. The gas outflow portion 16 connected to the upper portion of the 2 nd portion 11b communicates with the 2 nd internal passage 12b through the communication passages 15a, 15b, 15c, and 15 d. In this case, the hole diameters of the communication passages 15a, 15b, 15c, and 15d increase in order toward the front.

Then, the fuel gas flowing out of the gas outflow portion 16 is supplied to a gas nozzle (not shown) that injects the fuel gas into each mixing pipe of the gas burners 23a and 23b and the ceramic plate gas burner. In this case, in order to adjust the gas amount of the fuel gas supplied to the gas nozzle, a flow rate adjustment valve 6 is provided in the 2 nd inner passage 12 b.

As shown in fig. 2 and 3, the flow rate control valve 6 includes a cylindrical rotor 61 rotatably provided in the 2 nd internal passage 12b via a seal material 61 a. On the outer peripheral surface of the rotating body 61, 4 circumferentially disposed long grooves 62a, 62b, 62c, 62d of 1 st, 2 nd, 3 rd and 4 th are formed corresponding to the 1 st, 2 nd, 3 rd and 4 th communication passages 15a, 15b, 15c and 15d, respectively. In this case, the respective long grooves 62a, 62b, 62c, 62d are formed so as to have a width dimension that matches the hole diameter of the respective communication passages 15a, 15b, 15c, 15d and so as to be offset in the circumferential direction.

In the present embodiment, the orifice plate member 63 is attached to the outer peripheral surface of the 2 nd portion 11b in line with the communication passages 15a, 15b, 15c, and 15d, and the orifice plate member 63 has 4 small holes 63a, 63b, 63c, and 63d formed therein for adjusting the gas flow rate of the fuel gas flowing through the communication passages 15a, 15b, 15c, and 15d to the gas outflow portion 16 to a predetermined amount. Then, the rotating body 61 is rotated to appropriately align the respective long grooves 62a, 62b, 62c, and 62d with the respective communication passages 15a, 15b, 15c, and 15d, thereby adjusting the gas flow rate of the fuel gas flowing to the gas outflow portion 16.

The rotation angle of the rotating body 61 is adjusted by a fire power adjustment knob 7 provided around the fire extinguishing button 5. As shown in fig. 4, the fire power adjustment knob 7 is configured by attaching an annular cover 70b to a hollow cylindrical base 70 a.

The end of the fire power adjusting knob 7 on the 1 st internal passage 11a side is provided with a gear at a predetermined pitch, and the gear 71 meshes with a gear 72 fitted to one end of the rotating body 61 protruding from the 2 nd portion 11 b. This allows the rotation body 61 to rotate in synchronization with the rotation operation of the fire power adjustment knob 7.

Here, in order to reliably ignite the fuel gas when the gas burners 23a and 23b are operated to ignite, it is preferable to supply the fuel gas to the gas burners 23a and 23b so that the heating power of the gas burners 23a and 23b becomes, for example, high or medium.

In addition, in view of safety, a so-called child lock mechanism may be provided in order to operate the discharge unit without causing a child or the like to erroneously touch the fire extinguishing button 5.

Referring to fig. 2 to 6, in the present embodiment, the cam groove 73 is formed on the inner circumferential surface in the front direction of the heating power adjustment knob 7 protruding from the front panel 24, and the 1 st projecting piece 51 paired with the cam groove 73 is provided on the outer circumferential surface of the ignition and ignition button 5 moving in the front-rear direction in the hollow heating power adjustment knob 7 to constitute the forced rotation mechanism. In this case, the 1 st projecting piece 51 is fitted into a radial hole 52 provided on the outer peripheral surface of the spot fire extinguishing button in a state of being biased radially outward by a spring 53.

Thus, when the ignition button 5 is pushed from the off-valve position for ignition of the gas burners 23a and 23b, the 1 st projecting piece 51 becomes the driving piece, and the heating power adjustment knob 7 having the cam groove 73 formed as the driven piece is rotated to a predetermined position.

In this case, since the heating power adjustment knob 7 is rotated by the pushing operation of the ignition and extinguishing button 5, it is not necessary to increase the biasing force of the spring 17 that is compressed between the ignition and extinguishing button 5 and the 1 st part 11a, for example, and the structure of the gas control apparatus can be simplified.

However, when the heating power adjustment knob 7 is rotated to adjust the heating power at the valve opening position, the protruding piece 51 interferes with the cam groove 73, which may deteriorate the operability of the heating power adjustment knob 7 and adversely affect the feeling of the rotational operation of the cooker.

In the present embodiment, the height of the wall surface of the cam groove 73 is formed to decrease from one side to the other side in accordance with the pushing operation of the ignition and extinguishing button 5. When the click fire button 5 is pushed in from the closed position, the 1 st projecting piece 51 is accommodated in the hole 52 and reaches the flat portion 74 extending in the longitudinal direction from the cam groove 73 in accordance with the movement of the click fire button 5.

When the operating point fire extinguishing button 5 is further pushed, the 1 st projecting piece 51 accommodated in the hole 52 moves along the flat portion 74 and reaches the ignition position. Then, when the discharge unit is operated, the gas burners 23a and 23b are ignited, and the pressing of the ignition and extinguishing button 5 is released, the ignition and extinguishing button 5 is guided by the heart-shaped cam mechanism 5b to slightly return to the open valve position by the biasing force of the spring 5 c.

A rotation guide passage 75 flush with the flat portion 74 is formed on the inner peripheral surface of the heating power adjustment knob 7 corresponding to the valve opening position, and the heating power adjustment knob 7 is rotatable clockwise or counterclockwise along the rotation guide passage 75. In this case, the 1 st projecting piece 51 is completely accommodated in the hole 52 and does not engage with the cam groove 73.

Accordingly, the forced rotation of the fire power adjustment knob 7 by the forced rotation mechanism in conjunction with the pushing operation of the ignition and extinguishing button 5 from the closed position to the open position is completed before the ignition and extinguishing button 5 reaches the ignition position, and the engagement relationship between the projecting piece 51 of the ignition and extinguishing button 5 and the cam groove 73 of the fire power adjustment knob 7 is released at the open position.

Then, the rotation body 61 is rotated so that the gas flow rate is decreased when the heating power adjustment knob 7 is rotated clockwise, and the gas flow rate is increased when the heating power adjustment knob is rotated counterclockwise.

In this case, since the rotation range of the heating power adjustment knob 7 is restricted, the convex portion (not shown) provided on the outer peripheral wall of the base portion 70a of the heating power adjustment knob 7 is rotated counterclockwise until it engages with the stopper (not shown) provided on the cooktop 21, and the rotation body 61 is disposed such that the respective elongated grooves 62b, 62c, and 62d of the 2 nd, 3 rd, and 4 th correspond to the respective communication passages 15b, 15c, and 15d of the 2 nd, 3 rd, and 4 th, respectively, to maximize the amount of gas flowing into the gas outflow portion 16.

On the other hand, a rotation stopper 76 that contacts the projection 56 provided at one end of the fire extinguishing button 5 is provided in the rotation guide passage 75 at a position where only the 1 st long groove 62a coincides with the 1 st communication passage 15a (see fig. 6).

Thus, in the valve-open position, the heating power adjustment knob 7 is rotatable within the heating power adjustment range between the small heating power in which the heating power of the gas burners 23a and 23b is small when the gas flow rate flowing through the gas outflow portion 16 is minimum and the strong heating power in which the heating power of the gas burners 23a and 23b is strong when the gas flow rate flowing through the gas outflow portion 16 is maximum, and the one end portion of the rotation guide 75 and the rotation stopper 76 constitute the rotation range restriction mechanism.

Here, in order to facilitate the adjustment of the heating power by the cook, for example, the rattling sound may be emitted at positions where the heating power of the gas burners 23a and 23b is weak or medium.

As shown in fig. 3, a 2 nd projection piece 54 is provided on the outer peripheral surface of the fire extinguishing button 5 with respect to the 1 st projection piece 51. In this case, the 2 nd projecting piece 54 having a smaller diameter than the 1 st projecting piece 51 is fitted into a radial hole 55 provided on the outer peripheral surface of the spot fire extinguishing button 5 in a state of being biased radially outward by a spring 56.

Further, radial 1 st and 2 nd recesses 77 and 78 engageable with the 2 nd projecting piece 54 only are formed at predetermined positions of the rotation guide path 75. For example, the heating power adjustment knob 7 is rotated counterclockwise from the minimum flow rate (in this case, the heating power of the gas burners 23a and 23b is small), and when the 2 nd projecting piece 54 is engaged with the 1 st recessed portion 77, a click sound is generated. In this case, the 2 nd water groove 62b matches the 2 nd communication passage 15b except for the 1 st water groove 62a, and the gas flow rate to the gas outflow portion 16 is increased, so that the heating power of the gas burners 23a and 23b is reduced.

Further rotating the fire power adjustment knob 7 in the counterclockwise direction makes a click sound once the 2 nd concave portion 78 is engaged with the 2 nd projecting piece 54. In this case, the 3 rd water groove 62c matches the 3 rd communication passage 15c except for the 1 st and 2 nd water grooves 62a and 62b, and the gas flow rate to the gas outflow portion 16 is increased, so that the heating power of the gas burners 23a and 23b becomes medium.

The cam groove 73 is formed so that the fire power adjustment knob 7 can be rotated clockwise beyond the range of fire power adjustment in the off-valve position of the fire extinguishing button 5. When the heating power adjustment knob 7 is rotated to one end of the cam groove 73 after exceeding the heating power adjustment range, the 1 st projecting piece 51 engages with a wall surface 73a that is perpendicular to the pressing direction of the operation button 5 formed at one end of the cam groove 73.

Thus, it is not necessary to provide a separate operation portion for the child lock mechanism, and the ignition button 5 does not move even when pushed from the off position to the ignition position, and a lock position is formed in which the ignition mechanism of the gas burner is not operated.

Next, the operation of the gas control device 1 of the present invention will be described using the gas burner 23 a. When the fire extinguishing button 5 is pressed from the closed position shown in fig. 2, the fire power adjusting knob 7 is rotated by the action of the 1 st projecting piece 51 and the cam groove 73.

Here, fig. 7 shows an operation example of the heating power adjustment knob 7 when the ignition button 5 is operated to perform the ignition operation after the ignition is turned off at a position where the heating power of the gas burner 23a is weak.

When the operating point fire extinguishing button 5 is pushed in, the projecting piece 51 of the operating button 5 abuts on the cam groove 73. When the fire power adjusting knob 7 abuts on the cam groove 73, the fire power adjusting knob 7 rotates in accordance with the movement of the ignition and extinguishing button 5. Thus, the 1 st projecting piece 51 reaches the flat portion 74 extending in the longitudinal direction from the cam groove 73 while being accommodated in the hole 52.

In this case, the rotary body 61 is rotated by the gear 72, and at this position, the respective elongated grooves 62b, 62c, and 62d of the 1 st, 2 nd, and 3 rd coincide with the respective communication passages 15b, 15c, and 15d of the 1 st, 2 nd, and 3 rd, respectively, and the fuel gas having the gas flow rate at which the heating power of the gas burner 23a is moderate flows into the gas outflow portion 16 (see fig. 6(d) and 11).

When the pushing operation of the ignition button 5 is continued, the operating lever 4 is pushed in the backward direction by the push rod 5a to open the main valve, and the valve element 32 is pushed to the ignition position through the adsorption piece side as shown in fig. 8.

After reaching the ignition position, the gas burner 23a is operated by the discharge unit for ignition. When the flame detection element 26 (see fig. 1) provided near the gas burner 23a detects a flame of the gas burner 23a, the electromagnetic valve 3 is excited by a signal from the control unit and is kept in an open state.

When the pressing of the ignition fire extinguishing button 5 is released after the ignition of the gas burner 23a is confirmed, the ignition fire extinguishing button 5 is guided by the heart-shaped cam mechanism 5b to the valve opening position shown in fig. 9. In the valve-opening position, the main valve is kept open by the pressing action of the operating lever 4, and the heating power adjustment knob 7 is rotatable within the heating power adjustment range.

In order to increase the heating power of the gas burner, when the convex portion of the outer peripheral wall of the base portion 70a of the heating power adjustment knob 7 is rotated counterclockwise from the neutral position until the convex portion engages with the stopper provided in the burner body 21, the respective elongated grooves 62b, 62c, and 62d of the 2 nd, 3 rd, and 4 th slots coincide with the respective communication passages 15b, 15c, and 15d of the 2 nd, 3 rd, and 4 th slots, respectively, and the fuel gas having the strong heating power of the gas burner 23a flows into the gas outflow portion 16 (see fig. 6(e) and 10).

On the other hand, when the heating power adjustment knob 7 is rotated clockwise again until the 2 nd projecting piece 54 engages with the 1 st recessed portion 77 to generate the rattling sound in order to reduce the heating power of the gas burner 23a from the intermediate heating, the respective long grooves 62a, 62b of the 1 st and 2 nd correspond to the respective communication passages 15a, 15b of the 1 st and 2 nd, respectively, and the fuel gas having the weak heating power of the gas burner 23a flows into the gas outflow portion 16 (see fig. 6(c) and 3).

When the heating power adjustment knob 7 is rotated clockwise until the 1 st projecting piece 51 comes into contact with the rotation stopper 76, only the 1 st long groove 62a coincides with the 1 st communication passage 15a, and the fuel gas having the minimum gas flow rate at which the heating power of the gas burner 23a is small flows into the gas outflow portion 16 (see fig. 6 b and 12).

When the ignition and extinguishing button 5 is pushed in from the valve-open position to the rear when the gas burner 23a is extinguished, the heart-shaped cam mechanism b is returned, and the ignition and extinguishing button 5 is biased by the spring 5c and retreats to the closed valve position protruding from the fire power adjustment knob 7 shown in fig. 2.

In this case, the operating lever 4 released from the pressing by the pressing lever 5a is biased by the spring 34 to move backward, and closes the main valve. When the main valve is closed, the supply of the fuel gas to the gas burner 23a is stopped to extinguish the fire. When the control unit recognizes that the flame has been extinguished through the flame detection element 26, the valve solenoid valve 3 is closed.

Finally, when the heating power adjustment knob 7 is rotated clockwise along the cam groove 73 beyond the heating power adjustment range in the closed position, the 1 st projecting piece 51 engages with the wall 73a of the cam groove 73, and the ignition and extinguishing button 5 cannot be pressed, so that the child lock state is established.

In the present embodiment, when the ignition operation is performed by pressing the operation point fire extinguishing button 5, the heating power adjustment knob 7 is rotated to the position where the heating power of the gas burners 23a and 23b becomes middle by the forced rotation mechanism, but the present invention is not limited thereto.

For example, as shown in fig. 13(a), the heating power adjustment knob 7 may be configured to be rotated to a position where the heating power of the gas burners 23a and 23b becomes strong.

Further, as shown in fig. 13(b), when the heating power adjustment knob 7 is at a position where the heating power is strong immediately after the extinction of the gas burners 23a and 23b, the ignition operation may be performed in this state directly at the next ignition operation, and the heating power adjustment knob 7 may be rotated to a position where the heating power of the gas burners 23a and 23b is medium only when the extinction of the gas burners 23a and 23b is performed on the side of low heating power with respect to the position where the heating power is medium.

Claims (2)

1. A gas control device having an ignition and extinguishing button movable in a front-rear direction, a closed valve position for closing a gas passage connected to a gas burner and an open valve position for keeping the gas passage open, a fire power adjusting knob capable of adjusting fire power by adjusting a supply amount of fuel gas to the gas burner being provided around the ignition and extinguishing button,

the ignition operation is configured to be moved from a closed valve position to an open valve position by a push operation of the ignition/extinguishing button,

and a forced rotation mechanism for forcibly rotating the fire power adjustment knob in conjunction with a push-in operation of the fire ignition button from the closed valve position to the open valve position to change the fire power of the gas burner to a predetermined fire power, wherein the forced rotation of the fire power adjustment knob by the forced rotation mechanism is completed before the fire ignition button reaches the open valve position, and the engagement relationship between the fire ignition button and the fire power adjustment knob by the forced rotation mechanism is released at the open valve position.

2. The gas control device according to claim 1, wherein the forced rotation mechanism is constituted by a projecting piece which is fitted in a radial hole provided in an outer peripheral surface of the fire extinguishing button in a state of being biased outward and projects from the radial hole, and a cam groove which is provided in an inner peripheral surface of the fire power adjustment knob, and the projecting piece is retracted into the hole and separated from the cam groove as the fire extinguishing button moves from the off-valve position to the open-valve position, and the projecting piece is not engaged with the cam groove in the open-valve position.