JPH1122921A - Gas burner - Google Patents

Abstract

(57) [PROBLEMS] To simplify the configuration of a control mechanism capable of variably controlling the inflow ratio of a mixed gas into both ends in the longitudinal direction of a mixing chamber, to form the control mechanism inexpensively, and to improve the reliability thereof. Provide a gas burner to get. The gas burner is provided with an air inlet and a nozzle at one end of a mixing tube, and connected to a substantially central portion in the longitudinal direction of a mixing chamber having an elongated flame port plate at the other end of the mixing tube. By rotating the operating member at the connecting portion between the mixing pipe and the mixing chamber, the operation member is rotated about the rotation axis, and the mixed gas to the longitudinal ends of the mixing chamber is changed by changing the division ratio of the space of the connecting portion. And a control plate capable of controlling the inflow ratio of the air. The control plate is formed, for example, in a substantially disk shape and has a rotating shaft having an operation handle fixed in a diametric direction. The operation unit is provided with an indicator capable of grasping the position of the control plate from outside the mixing tube.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a long gas burner used for industrially baking foods and the like, and more particularly to a gas burner capable of individually controlling the amount of heat generated at both longitudinal ends. .

[0002]

2. Description of the Related Art Conventionally, when food or the like is industrially baked or dried, a long infrared radiation burner (hereinafter, referred to as a gas burner) that burns with gas has been used.
Examples of this type of gas burner include Utility Model Registration No. 2
No. 535347.

In this gas burner, as shown in FIG. 6, a distribution box 54 for partitioning the mixing chamber 53 is provided at the longitudinal center of the mixing chamber 53 (distribution chamber), and the mixed gas from the mixing chamber 53 to the distribution box 54 is provided. A first slide plate 55 for controlling the flow rate of the mixed gas is provided, and the flow direction of the mixed gas supplied into the mixing chamber 53 from the outside via the mixing pipe 52 is controlled, so that both sides in the longitudinal direction of the mixing chamber 53 are controlled. A second slide plate 56 for changing the ratio of the flow of the mixed gas to the section is provided.

An operation rod 57 provided in the mixing chamber 53 is provided at one end of the first slide plate 55 in the longitudinal direction.
One end of the operation rod 57 is connected, and the operation part 57a pulled out from one side wall of the mixing chamber 53 of the operation rod 57 is operated to move the operation rod 57 forward and backward. Thereby, the ventilation hole provided on the upper surface of the distribution box 54 and the first slide plate 5
The opening area changes due to the overlap with the ventilation holes provided in 5, and the inflow ratio of the mixed gas from the opening to the distribution box 54 is variably controlled.

[0005]

However, in this gas burner 51, a control mechanism for variably controlling the ratio of the mixed gas flowing into the mixing chamber 53 includes a distribution box 54,
Since the first slide plate 55, the second slide plate 56, the operation rod 57, and the like are required, the number of components of the control mechanism increases, and a large number of ventilation holes are formed in the distribution box 54 and the first slide plate 55. However, the control mechanism tends to be complicated and expensive, for example, the component shape becomes complicated and the component cost increases.

Further, the above-mentioned control mechanism includes a distribution box 54.
And a plurality of members including the first slide plate 55 and the second slide plate 56, and the like, are configured to control the diverting ratio by a sliding operation, and these members are positioned relatively close to the flame port plate 58 of the mixing chamber 53. The sliding portion of each member is easily heated to a high temperature depending on the temperature at the time of combustion of the gas burner 51. For example, the sliding portion is thermally deformed due to long-term use and the sliding operation is not smoothly performed. There was a problem that reliability was poor.

The present invention has been made in view of such circumstances, and an object of the present invention is to provide a control capable of variably controlling a ratio of a mixed gas flowing into both longitudinal ends of a mixing chamber. It is an object of the present invention to provide a gas burner which can be formed at a low cost by simplifying the structure of a mechanism and can improve the reliability thereof.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, an air inlet and a nozzle are provided at one end of a mixing pipe, and the other end of the mixing pipe is provided. In a gas burner in which the longitudinal center of a mixing chamber having a long flame port plate is connected to the mixing chamber, the operation member is rotated at the connection between the mixing pipe and the mixing chamber to rotate about a rotation axis. In addition, a control plate capable of controlling the ratio of the mixed gas flowing into both ends in the longitudinal direction of the mixing chamber by changing the division ratio of the space of the connecting portion is provided.

With this configuration, the control plate is tilted, for example, by rotating the operating member provided on the mixing tube, and the space division ratio of the connecting portion between the mixing tube and the mixing chamber changes. Thus, the inflow ratio of the mixed gas into both longitudinal ends of the mixing chamber is variably controlled. Therefore, the inflow ratio can be controlled by the tilting operation of one substantially plate-shaped control plate by the operation member, and the configuration of the control mechanism is simplified, and the operation member is provided in the mixing pipe located farther from the flame port plate. Accordingly, the operation member is less affected by the temperature at the time of combustion or the like, and a stable operation of the control mechanism for a long period can be obtained.

According to a second aspect of the present invention, the control plate is formed in a substantially disk shape, the rotation shaft is fixed in the diametric direction, and the operation handle is provided at a protruding portion of the rotation shaft from the mixing tube. It is characterized by having been done. With this configuration, the rotary shaft fixed in the diameter direction of the substantially disk-shaped control plate can be directly rotated by the operation handle, and the position adjustment of the control plate becomes smoother. Stable control can be performed.

The invention according to claim 3 is characterized in that the operation member is provided with an indicator capable of grasping the position of the control plate from outside the mixing tube. With this configuration, the state of the control plate can be easily grasped from the outside of the mixing tube, and the mixed gas can be constantly and stably supplied to both longitudinal ends of the mixing chamber.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. 1 to 5 show one embodiment of a gas burner according to the present invention, and FIG.
FIG. 2 is an enlarged view of a portion A in FIG. 1, FIG.
Is a perspective view of the control plate unit, and FIG. 5 is a cross-sectional view of a support portion of the control plate unit.

In FIG. 1 to FIG. 5, a gas burner 1 has a substantially cylindrical mixing pipe 2 having a diameter gradually increasing from a substantially upstream side 2a to a downstream side 2b, and an opening at a downstream side 2b of the mixing pipe 2. And a mixing chamber 3 connected to the mixing chamber 4. Mixing tube 2
The air damper portion 5 having a large diameter is formed on the upstream side 2a, and a pair of air suction ports whose opening degree can be adjusted by an air damper (not shown) is provided on a side wall of the air damper portion 5, and a center of the air damper portion 5 is provided. The part is provided with a nozzle 7. The mixing pipe 2 mixes the air sucked from the air suction port with the gas supplied from the nozzle 7 to generate a mixed gas, and supplies the mixed gas into the mixing chamber 3.

The opening 4 on the downstream side 2b of the mixing tube 2
Is opened upward, which is a direction orthogonal to the axial direction of the mixing tube 2, and a central portion in the longitudinal direction of the mixing chamber 3 is connected to the opening 4. The mixing chamber 3 is formed in an elongated gutter shape by the mixing chamber case 8 and has an opening 8a formed on the upper surface, and a connection hole 8b connected to the opening 4 of the mixing pipe 2 is formed in the center of the bottom surface. ing. The mixing chamber case 8 of the mixing chamber 3 and the mixing pipe 2 are formed into a predetermined shape by casting, and the joint between the opening 4 and the connection hole 8b is fixed with a screw 6 or the like via a packing 26. Thereby, the mixing pipe 2 and the mixing chamber 3 are integrated.

A flame plate 9 made of ceramics or the like and formed with a large number of flame ports 9a is disposed in an opening 8a on the upper surface of the mixing chamber 3, and above the connecting hole 8b of the mixing chamber 3. Is provided with a pressure equalizing plate 10. This equalizing plate 10
Are fixed by two equalizing plate fixing screws 12 to two equalizing plate fixing portions 11a and 11b formed along the longitudinal direction of the bottom surface of the mixing chamber case 8, and the equalizing plate 1
The upper end of the partition plate 13 is fixed to the lower surface of the substantially central portion of the longitudinal direction 0 by welding or the like.

A control plate unit 14 is disposed below the partition plate 13 at a downstream portion 2b of the mixing tube 2 which is a connecting portion between the mixing tube 2 and the mixing chamber. As shown in FIG. 4, the control plate unit 14 has a control plate 15, and an operation member 16 including a rotation shaft 17 and an operation handle 18 connected to the control plate 15. The control plate 15 is formed of a single substantially disk-shaped plate body, has a flat fixing portion 15a in a diameter portion thereof, and has both sides bent at a predetermined angle in the same direction.

The control plate 15 is formed by pressing a stainless steel plate, for example, and is tilted by a predetermined angle in the direction of arrow A or the direction of arrow B in FIG. Then, the fixing portion 1 of the control plate 15
A rotation shaft 17 having a substantially circular cross section of the operation member 16 is fixed to 5a.

The rotary shaft 17 has a D-cut notch 17a having a screw hole 19 (see FIG. 2) in a part of its outer peripheral surface.
Is formed, and a pair of screw holes 19 of the notch 17a
The control plate fixing screws 20 are screwed through holes provided in the fixing portion 15a of the control plate 15, respectively.
The control plate 15 is fixed to the control panel. Further, the tip of the rotating shaft 17 is taken out of the downstream side 2b of the mixing tube 2, and
An operation handle 18 is fixed to the tip. By rotating the operation handle 18 in the direction of arrow C or in the direction of arrow D as shown in FIG.
Rotate in the same direction.

The rotating shaft 17 is rotatably supported on the side wall 21 on the downstream side 2b of the mixing tube 2 as shown in FIG. That is, a hole 21 a having a counterbore 21 b is formed in the side wall 21, and the rotary shaft 17 is inserted through the hole 21 a from outside the side wall 21, and a flange 17 b provided on the rotary shaft 17 is fitted with the seal packing 22. Counterbore 2 through
1b. The rotating shaft 17 is supported by the side wall 21 with the hole 21 a sealed by the seal packing 22 by fixing the rotating shaft fixing plate 23 to the outer surface of the side wall 21 with the screw 24.

On the surface of the rotating shaft fixing plate 23, there is provided an indicator 2 comprising a plurality of scales from which the rotating state of the rotating shaft 17, ie, the tilting state of the control plate 15, can be visually recognized from the outside.
5 (see FIG. 3) is provided. Also, the rotating shaft 17
Is configured to be able to stop at an arbitrary position by the co-tightening frictional force between the flange portion 17b and the seal packing 22, and the control plate 15 is provided with the upper edge and the partition plate 13 as shown in FIGS. Is set so as to have a predetermined gap with the lower end edge of the.

Next, the operation of the gas burner 1 will be described. The gas burner 1 is used, for example, for baking food and the like, and a plurality of gas burners 1 are arranged adjacent to a gas stand (not shown). When baking food or the like, first, a gas cock (not shown) is opened to supply gas into the mixing pipe 2 through the nozzle 7, and an appropriate amount of the air suction port of the air damper unit 5 is opened.
Inhale air inside.

The gas and air supplied into the mixing pipe 2 are mixed in the mixing pipe 2 to become a mixed gas, which is divided and supplied to the mixing chamber 3 from the opening 4 of the mixing pipe 2, and a large number of the flame port plates 9 are provided. From the flame outlet 9a. This gas mixture is ignited by an ignition mechanism (not shown) and burns, and the flame plate 9 glows red and infrared rays are radiated from its surface. As a result, the gas burner 1 is brought into a combustion state, and foods and the like placed on the grill above the gas burner 1 are burned.

When the gas burner 1 is burning,
The mixed gas supplied from the mixing pipe 2 into the mixing chamber 3 is controlled by the control plate unit 14 as follows. That is, the control plate 15 of the control plate unit 14 is disposed inside the downstream side 2b of the mixing tube 2, and the mixed gas flowing through the mixing tube 2 at this position is as shown by arrows E and F in FIG. It is diverted and flows on both sides of the partition plate 13 from both sides of the control plate 15, and both ends 3a, 3b in the longitudinal direction of the mixing chamber 3 (see FIG. 1).
Respectively.

The position (angle) of the control plate 15 is adjusted by the rotation of the rotary shaft 17 by the rotation of the operation handle 18 of the operation member 16. For example, when the combustion amount in the right portion of the gas burner 1 (the right end 3b side of the mixing chamber 3) is small, the operation handle 18 is rotated in the direction of arrow C to rotate the rotary shaft 17 in the same direction. , Control board 1
5 is tilted in the direction of arrow a.

As a result, the flow rate of the mixed gas flowing as indicated by the arrow on the right side of the control plate 15 becomes larger than the flow rate of the mixed gas flowing as indicated by the arrow E. At this time, the flow rate of the mixed gas flowing into the right end 3b of the mixing chamber 3 is controlled by the control plate 15
Is approximately the sum of the flow rate of the mixed gas flowing through the gap between the control plate 15 and the partition plate 13 as indicated by the arrow.

Conversely, when the amount of combustion on the left side of the gas burner 1 (on the left end 3a side of the mixing chamber 3) is small, the operation handle 18 is rotated in the direction of arrow D to rotate the rotary shaft 17 in the same direction. Then, the control plate 15 is tilted in the direction of arrow B. Thereby, the flow rate of the mixed gas flowing as indicated by the arrow E on the left side of the control plate 15 becomes larger than the flow rate of the mixed gas flowing as indicated by the arrow.

By the tilting of the tilting plate 15 in the direction of arrow a or in the direction of arrow b, the flow rate ratio of the mixed gas flowing on both sides of the control plate 15 is adjusted and supplied to the longitudinal ends 3a, 3b of the mixing chamber 3. The flow rate of the mixed gas to be heated is optimized, for example, the amount of combustion in the longitudinal direction of a plurality of gas burners 1 provided adjacent to the gas table can be appropriately set, and uneven heating of a heated object such as food on the gas table can be achieved. Is reduced.

After the amount of combustion at both ends 3a and 3b in the longitudinal direction of the mixing chamber 3 is set to a predetermined value by rotating the operating handle 18, for example, the position of the operating handle 18 is confirmed by the indicator 25, And record the location.

As described above, in the gas burner 1 of the above embodiment, the control plate 15 of the control plate unit 14 disposed inside the downstream side 2b of the mixing pipe 2 is connected to the operation handle 18 provided outside the mixing pipe 2. By rotating and tilting the rotary shaft 17 by rotating the rotary shaft 17, it is possible to adjust the inflow ratio of the mixed gas in the mixing pipe 2 into both longitudinal end portions 3a and 3b of the mixing chamber 3, so that the control plate unit is provided. 14 can be composed of one control plate 15 and operation member 16, and the configuration of the control plate unit 14 can be simplified. As a result, it is possible to reduce the number of components of the control plate unit 14 as compared with the related art, and to make the control plate unit 14 itself inexpensive, for example, by simplifying the shape of each component and reducing its manufacturing cost. Becomes possible.

Further, since the control plate 15 is formed in a substantially disk shape and the rotating shaft 17 is fixed to a diameter portion thereof, the control plate 15 can be directly and smoothly rotated by rotating the operation handle 18. And the tilting operation of the control plate 15 can be easily performed.

Further, since the rotating shaft 17 of the operating member 16 for tilting the control plate 15 and the like are provided in the mixing tube 2,
The position where the operating member 16 and the control plate 15 are disposed is farther than the flame port plate 9, and is less affected by the flame (combustion temperature) during combustion of the gas burner 1 as compared with the conventional example.
Thermal deformation of the rotating shaft 17 is reliably prevented, and the control plate 15
Can be stably performed over a long period of time, and a highly reliable gas burner 1 can be obtained.

Since the indicator 25 is attached to the rotating shaft fixing plate 23 of the operating member 16, the tilting position of the control plate 15 can be grasped at a glance from the outside of the mixing pipe 2, and the operating handle 18 can be operated. By recording the stop position and the like, the combustion state in the longitudinal direction of the gas burner 1 can be easily set or maintained in the best state, and the usability of the gas burner 1 is improved. It becomes possible.

Furthermore, the amount of combustion at both longitudinal end portions 3a and 3b of the mixing chamber 3 can be appropriately set by the tilting operation of the control plate 15, so that a plurality of gas burners 1 are placed on a gas table adjacent to the gas table. Uneven heating of an object to be heated such as food. In particular, in a gas stand in which a plurality of gas burners 1 are arranged adjacent to each other in two rows,
Due to the interference of the adjacent gas burner 1, only the central part of the gas table becomes high temperature, and the object to be heated tends to have uneven heating. However, according to the gas burner 1, since the amount of combustion at both ends 3a and 3b in the longitudinal direction can be individually set, the amount of combustion near the center of the gas table is small and the amount of combustion near the periphery is small. , The uneven heating of the object to be heated can be effectively reduced.

In the above embodiment, the rotation shaft 17
Is supported on the side wall 21 of the mixing tube 2 in a cantilever state, but both ends of the rotating shaft 17 may be supported on the side wall 21, or the indicator 25 may be provided on the outer surface of the side wall 21 of the mixing tube 2. Is also good. Further, in the above embodiment, the case where the mixing pipe 2 and the mixing chamber 3 are formed by casting has been described. However, the mixing pipe 2 and the mixing chamber 3 may be formed by, for example, drawing a steel plate. Furthermore, the shape of the control plate 15 in the above embodiment is also an example, and it goes without saying that various changes can be made without departing from the scope of the present invention, for example, by forming the control plate 15 into a substantially rectangular shape.

[0035]

As described in detail above, claims 1 to 3
According to the invention described above, a control mechanism for controlling the flow rate of the mixed gas flowing from the mixing pipe to both ends in the longitudinal direction of the mixing chamber is provided at a connection portion between the mixing pipe and the mixing chamber; And an operation member for rotating the rotation shaft fixed to the control plate to tilt the control plate, so that the configuration of the control mechanism can be simplified and the control mechanism can be formed at low cost.

Further, since the control plate and the operation member are provided in the mixing pipe separated from the flame plate of the gas burner, the control mechanism is less affected by heat at the time of combustion of the gas burner, and is stable for a long time. It can be operated, and its effects can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a gas burner according to the present invention.

FIG. 2 is an enlarged view of a portion A in FIG.

FIG. 3 is a side view of a main part of the same.

FIG. 4 is a perspective view of the control plate unit.

FIG. 5 is a cross-sectional view of the supporting portion.

FIG. 6 is a sectional view showing a conventional gas burner.

[Explanation of symbols]

 1 gas burner 2 mixing pipe 2a upstream 2b downstream 3 mixing chamber 3a, 3b・ ・ ・ End 5 ・ ・ ・ ・ ・ ・ Air damper 9 ・ ・ ・ ・ ・ ・ Flame plate 10 ・ ・ ・ ・ ・ ・ Equalizing plate 13 ・ ・ ・ ・ ・ ・ Partition plate 14 ・ ・ ・ ・ ・ ・Control plate unit 15 Control plate 16 Operating member 17 Rotating shaft 17b Flange 18 Operation handle 22 ····· Seal packing 23 ····· Rotating shaft fixing plate 25 ····· Indicator

Claims (3)

[Claims] An air inlet and a nozzle are provided at one end of a mixing tube, and a substantially central portion in a longitudinal direction of a mixing chamber having an elongated flame port plate is connected to the other end of the mixing tube. In the connecting portion between the mixing tube and the mixing chamber, the operation member is rotated to rotate around a rotation axis, and the division ratio of the space of the connecting portion is changed to both ends in the longitudinal direction of the mixing chamber. A gas burner provided with a control plate capable of controlling the inflow ratio of the mixed gas. 2. The control plate according to claim 1, wherein the control plate is formed in a substantially disc shape, a rotation shaft is fixed in a diametrical direction, and an operation handle is provided on a projection of the rotation shaft from the mixing tube. The gas burner according to claim 1, wherein 3. A gas burner according to claim 1, wherein said operating member is provided with an indicator capable of grasping the position of the control plate from outside the mixing tube.