JP4625928B2 - Gas equipment thermal power control device - Google Patents

Description

  The present invention relates to a thermal power adjusting device that is provided in a gas appliance such as a table stove or a grill having a gas burner and can manually adjust the thermal power of the gas burner.

  For example, in a table stove, a gas burner provided on the stove part and the grill can be burned, and a pan or a fish placed in the grill can be cooked by heating. In addition, such a gas appliance is provided with a thermal power adjusting device that adjusts the thermal power by manually adjusting the gas flow rate to the gas burner. This thermal power control device includes a needle valve that is provided in a gas flow path in the gas pipe main body and changes the opening degree of the gas flow path by movement in the axial direction, and an operation member that moves the needle valve in the axial direction. ing. As the operation member, a lever type (thermal power adjustment lever) provided on the gas pipeline main body through a mounting base plate so as to be rotatable is often used. This is because the pin protruding from the side of the needle valve is passed through the vertical guide hole provided at the base end of the thermal power adjustment lever and through the oblique guide hole of the mounting base plate, thereby rotating the thermal power adjustment lever. The needle valve can be moved in the axial direction together with the pin by the guide of the vertical guide hole and the oblique guide hole accompanying the operation.

In such a thermal power control device, if the thermal power is throttled rapidly, the gas flow path is rapidly throttled by the needle valve, so the decrease in the primary air suction amount in the gas burner cannot catch up, and the balance of the primary air ratio May collapse and extinguish the fire.
Therefore, the applicant of the present application urges the needle valve to a low-fire position by a coil spring as disclosed in Patent Document 1 and solves such a problem, and causes the sliding surface between the needle valve and the gas flow path to become viscous. Grease is applied and the operating force of the thermal power adjustment lever is transmitted directly to the needle valve by the shape of the vertical guide hole from the high heat position to the middle point due to the shape of the oblique guide hole. This is a thermal power control device in which the needle valve is slowly moved to a low heat position by balancing the biasing force of the coil spring and the resistance of the viscous grease.

JP 2004-278811 A

  However, in the case of using viscous grease, it is necessary to manage the viscosity of the viscous grease in order to keep the balance between the biasing force of the coil spring and the resistance of the viscous grease constant.

  Accordingly, the present invention provides a thermal power control apparatus for a gas appliance that can be adjusted from a high fire side to a low fire side without deteriorating usability or extinguishing the fire, and does not require viscosity management of viscous grease. It is for the purpose.

In order to achieve the above object, according to a first aspect of the present invention , a low resilience member is accommodated in a guide sleeve arranged coaxially with a needle valve, and the needle valve is moved in the direction of constricting the gas flow path by the low resilience member. When the operation member is operated from the low heat side to the high fire side, the needle valve is interlocked with the operation member, while when the operation member is operated from the high fire side to the low fire side, the operation member and the needle valve are interlocked. The needle valve is moved to the low heat side only by the urging force of the low-repulsion body.
The invention according to claim 2, in addition to the purpose of claim 1, to obtain a suitable foam material is obtained by a configuration in which the foam body, made of a silicon-based gel.

According to the first aspect of the present invention, appropriate adjustment from the high fire side to the low fire side can be reliably performed without using viscous grease. For this reason, the viscosity management of the viscous grease as in the past becomes unnecessary, and the mass productivity can be improved.
In addition , the guide sleeve can effectively prevent dust from adhering to the low resilience body, and can also be expected to retain its shape during compression / restoration. Therefore, the dust resistance and durability of the low resilience body are improved.
According to the second aspect of the invention, in addition to the effect of the first aspect, a suitable low resilience body capable of maintaining the same characteristics over a wide temperature range can be obtained.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view showing a thermal power control device in a table stove that is an example of a gas appliance. The thermal power control device 1 is provided in a gas flow path 3 formed in a gas pipe body 2 and moves in an axial direction. It has a possible needle valve 4 and a heating power adjusting lever 5 as an operation member for moving the needle valve 4 in the axial direction by a sliding operation in the left-right direction in FIG. 6 is an inlet for fuel gas in the gas pipe main body 2, 7 is an outlet to the gas burner side, and a nozzle 9 connected to the burner body 8 of the gas burner is connected to the outlet 7. As the fuel gas is ejected, the primary air is sucked from the intake port 10 of the burner body 8.

  The needle valve 4 is a shaft body having a circular cross section with a pin 11 projecting in the radial direction on the upper side surface, and a tapered portion 12 is formed at the lowermost position. Depending on the position in the axial direction, the gas flow path is formed. The flow rate of the gas to the gas burner side can be changed by adjusting the opening of the valve seat 13 provided at 3. An O-ring 14 is externally mounted on the lower portion of the needle valve 4 and grease is applied to the sliding surface between the needle valve 4 and the gas flow path 3 so that the sealing performance on the sliding surface is ensured. It has become.

  Further, an inverted L-shaped mounting base plate 15 whose upper plate portion 16 covers the upper side of the needle valve 4 is fixed above the gas pipe body 2, and the upper plate portion 16 of the mounting base plate 15 and the needle valve 4 are fixed. Between the two, a cylindrical low-repulsion body 17 is interposed. The low resilience member 17 is made of a silicon-based gel that can maintain a stable elasticity even in a range of about −20 ° C. to 200 ° C., and the needle valve 4 within a cylindrical guide sleeve 18 provided on the lower surface of the upper plate portion 16. The needle valve 4 is urged in the throttle direction of the gas flow path 3 by its elasticity. Note that the guide sleeve 18 is formed long and downward so as to be covered also on the upper part of the needle valve 4, and the pin 11 of the needle valve 4 is made to enter the slit 19 formed in the axial direction. As a result, the needle valve 4 is prevented from rotating.

  On the other hand, the thermal power adjustment lever 5 is held on the front panel of the table stove on the front side of the guide sleeve 18 so as to be slidable in the left-right direction, and has a horizontal portion 20 on the right side, and the left side is linear as it goes to the left. A pin 11 that has a second horizontal portion 22 that is lower than the horizontal portion 20 via a lower inclined portion 21 and protrudes forward from the guide sleeve 18 is brought into contact with the upper side. Therefore, the lower position of the needle valve 4 urged downward by the low resilience member 17 is determined by the position of the pin 11 with respect to the heating power adjustment lever 5. The horizontal portion 20 is provided with an operation portion (not shown) that protrudes to the outside of the front panel.

In the thermal power control apparatus 1 configured as described above, when the thermal power is changed to a strong fire, the thermal power control lever 5 is slid to the left in FIG. Then, the pin 11 rises in the slit 19 of the guide sleeve 18 by the guide of the inclined portion 21, compresses the low resilience body 17 as shown in FIG. Raise to the upper limit position located above. Therefore, the opening degree of the gas flow path 3 is increased, the amount of fuel gas supplied to the gas burner is increased, and a strong fire is caused.
On the other hand, when the thermal power is changed from high to low, if the thermal power adjustment lever 5 is slid to the right, the urging force does not immediately appear due to the characteristics of the low-repulsion body 17, so the thermal power control lever 5 moves away from the pin 11 and the interlock is cut off Thereafter, the needle valve 4 is slowly lowered by the expression of the urging force of the low resilience body 17. When the pin 11 reaches the lowest position where it abuts against the second horizontal portion 22 as shown in FIG. 5B, the opening of the valve seat 13 is minimized by the taper portion 12 and a low heat is generated.

  Note that this is not limited to high to low fire, but the same applies to the case of changing from a high fire to a medium fire or from a medium fire to a low fire. The form of descending only with the urging force of the same does not change. Therefore, in the operation from the high-fire side to the low-fire side, the balance between the supply amount of the fuel gas to the gas burner and the suction amount of the primary air is not lost even if the thermal power adjustment lever 5 is rapidly slid, and there is a risk of extinguishing the fire. Disappear. In addition, since the low resilience body 17 does not change in elasticity from low temperature to high temperature, the moving speed of the needle valve 4 becomes equal even at the first ignition in the morning or at the reignition immediately after use.

Thus, according to the thermal power control apparatus 1 of the said form, the needle valve 4 is urged | biased by the low resilience body 17 to the throttle direction of the gas flow path 3, and the operation from the low heat side of the thermal power control lever 5 to the high fire side is carried out. In some cases, the needle valve 4 is interlocked with the thermal power adjustment lever 5, while when the thermal power adjustment lever 5 is operated from the high fire side to the low fire side, the interlock between the thermal power adjustment lever 5 and the needle valve 4 is cut off, and the low-repulsion body 17 Since the needle valve 4 is moved to the low-fire side only by the urging force, the adjustment from the high-fire side to the low-fire side can be reliably performed without being affected by the temperature. In addition, since the needle valve 4 can be moved slowly from the high-fire side to the low-fire side without using viscous grease, it is not necessary to manage the viscosity of the viscous grease as in the prior art, and the mass productivity of the apparatus can be improved. it can.
Further, since the low resilience body 17 is accommodated in the guide sleeve 18 disposed coaxially with the needle valve 4, the guide sleeve 18 effectively prevents dust from adhering to the low resilience body 17 and is compressed. / Preservation of shape during restoration can be expected. Therefore, the dust resistance and durability of the low resilience body 17 are improved.
Furthermore, since the low-repulsion body 17 is made of a silicon gel, a suitable low-repulsion body that can maintain the same characteristics over a wide temperature range can be obtained.

Note that the low resilience is not limited to a silicon-based gel, and other materials such as a flexible urethane foam can be used as long as the biasing force does not immediately appear like a coil spring.
In addition, the interlocking between the operating member and the needle valve and the blocking thereof are not limited to the contact structure between the inclined portion of the heating power adjusting lever that slides and the pin of the needle valve as in the above-described form. In this way, using the guide of the pin by the guide plate of the heating power adjustment lever that rotates and the fixed guide hole provided in the fixed guide plate of the mounting base plate, the interlocking when moving to the high fire side and the low fire side You may cut off at the time of movement. Therefore, in this case, the movement to the low heat side is not always limited to the interlocking, and the structure of the fixed guide hole may block at least from the medium heat to the low heat.
In addition, the gas appliance is not limited to a table stove, and the present invention can be applied to, for example, a built-in stove or a single gas grill as long as it is provided with a manual heating power control device.

It is explanatory drawing of a thermal-power adjustment apparatus.

Explanation of symbols

1 .... Heat power control device, 2 .... Gas pipe body, 3 .... Gas flow path, 4 .... Needle valve, 5 .... Heat power control lever, 11 .... Pin, 15 .... Mount base plate, ... Low resilience, 18 ... Guide sleeve, 20 ... Horizontal part, 21 ... Inclined part.

Claims (2)

A thermal power control apparatus for a gas appliance, comprising a needle valve that is provided in a gas flow path and changes an opening degree of the gas flow path by movement in an axial direction, and an operation member that moves the needle valve in the axial direction. And
The accommodating the foam body to the needle valve and the guide sleeve disposed coaxially, urges toward aperture of the gas channel the needle valve by the foam body, high heat from the low heat side of the operating member When the operation member is operated to the side, the operation member is interlocked with the needle valve, while when the operation member is operated from the high fire side to the low fire side, the operation member and the needle valve are disconnected from each other, and the low repulsion is performed. The apparatus for adjusting a thermal power of a gas appliance, wherein the needle valve is moved to a low-fire side only by an urging force of a body. The thermal power control apparatus for a gas appliance according to claim 1, wherein the low resilience body is made of silicon gel.

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