JP4516368B2 - Stove burner - Google Patents

Description

  The present invention relates to a structure of a stove burner, and more particularly to a structure of a portion that ignites gas.

  In general, an ignition flame hole of a stove burner discharges a gas mixed with primary air into a spark gap of an ignition device, gives discharge energy to the atmosphere to ignite, and forms an ignition flame in the ignition flame hole. Fire is transferred to the main flame hole. However, if the discharge speed of the gas discharged from the ignition flame hole is too high, the ignition flame is difficult to ignite, and even if ignited, the ignition flame does not lift and transfer to the main flame hole, resulting in poor ignition performance. For this reason, it is desirable to discharge a low-speed gas from the ignition flame hole at a uniform flow rate as much as possible. In particular, burners with increased primary air for the purpose of improving combustibility tend to increase the speed of the gas discharged from the flame holes, and in the ignition flame holes, the gas flow rate is reduced to form an ignition flame. Is important.

Even in the conventional stove burner, a device has been devised to slow down the flow rate of the gas discharged from the ignition flame hole, but the ignition flame hole is subdivided finely, or the flow rate is increased in the vicinity of the ignition flame hole. It has been devised to provide resistance for slowing down (see, for example, Patent Document 1, Patent Document 2, Patent Document 3, and Patent Document 4), and the amount of gas discharged from the ignition flame hole to some extent. Although the discharge speed can be slowed to improve the ignition performance, it cannot be said that the discharge speed has been sufficiently slowed down, and even with a burner with an increased primary air volume, the ignition flame is easy to lift and difficult to transfer The ignition performance was not good.
Japanese Patent No. 3138416 JP-A-1-269812 JP-A-1-142325 Japanese Patent Laid-Open No. 5-60311

  The present invention has been invented in view of the above-mentioned conventional problems, and a burner for a stove that can improve the ignition performance by sufficiently reducing the discharge speed of the gas from the ignition flame hole. The issue is to provide.

In order to solve the above-mentioned problem, the burner A for a stove according to the present invention is for a stove in which a burner cap 4 is placed on a burner body 2 having an annular mixing chamber 1 and a large number of main flame holes 5 are provided on the periphery. In the burner, an ignition flame hole 6 is provided in a part of the periphery, and an ignition device 7 for generating an ignition spark is provided in the vicinity of the ignition flame hole 6, and the ignition flame hole 6 and the mixing chamber 1 are provided between them. the retention space 8 which the discharge flow rate Ru is decelerated gas from the ignition flame holes 6 by residence of gas is provided, a communicating hole 9 with communicating the mixing chamber 1 and the retention space 8 at the communication hole 9 The ignition flame hole 6 is characterized by a positional relationship that is not positioned in a straight line in the radial direction.

  According to the above configuration, the mixed gas mixed with the primary air flows into the staying space 8 from the mixing chamber 1 through the communication hole 9 and is discharged from the ignition flame hole 6 through the staying space 8. Then, the gas is ignited by ignition by the igniter 7, and an ignition flame is formed in the ignition flame hole 6, and a fire is transferred. At this time, the gas flows from the mixing chamber 1 into the retention space 8 through the communication hole 9 and is discharged from the ignition flame hole 6 so that the gas stays in the retention space 8, thereby reducing the gas flow velocity. The discharge speed of the gas from the ignition flame hole 6 can be reduced, and the communication hole 9 that is the entrance to the retention space 8 and the ignition flame hole 6 that is the exit from the residence space 8 are aligned in the radial direction. Due to the non-positional relationship, the gas flowing in from the communication hole 9 once stays in the retention space 8 and then is discharged from the ignition flame hole 6 so that the gas flow rate is further decelerated and the ignition flame hole 6 The discharge speed can be reduced. Accordingly, the gas discharge speed from the ignition flame hole 6 can be sufficiently reduced to discharge the gas from the ignition flame hole 6. Thereby, even if the primary air amount is increased, the ignition performance can be improved without lifting the ignition flame.

  It is also preferable that the opening area of the communication hole 6 is smaller than the opening area of the ignition flame hole 6. In this case, the gas is more easily retained in the retention space 8, the discharge speed of the gas discharged from the ignition flame hole 6 is further decreased, and the ignition performance is improved.

  An ignition flame hole 6 is provided in a concave curved surface 30 provided on the outer periphery of the burner cap 4 so as to be recessed toward the inner peripheral side from other portions. The flange portion 23 is continuously extended so as to protrude, and the ignition spark target 22 of the ignition device 7 is provided on the flange portion 23. The ignition flame hole 6 is one, whereas the two communication holes 9 are provided. It is also preferable that the flame hole 6 is a vertically long opening that is long in the vertical direction. In this case, by providing the ignition flame hole 6 on the concave curved surface 30 and the flange portion 23, the gas discharged from the ignition flame hole 6 when ignited by the ignition device 7 is the concave curved surface 30 or the flange portion 23. Ignition by the ignition device 7 is reliably performed by staying in a portion surrounded by the igniter and the ignition performance is improved. In addition, the presence of the heel portion 23 can prevent the soup from adhering to the ignition device 7 to deteriorate the ignition performance. Further, since the number of the ignition flame holes 6 is one and the number of the communication holes 9 is two, the gas separately flowing from the two communication holes 9 stays in the retention space 8 and then merges. By discharging the gas from the ignition flame hole 6, the gas tends to stay in the retention space 8, the discharge speed of the gas discharged from the ignition flame hole 6 is reduced, and the ignition performance is improved. Further, by making the ignition flame hole 6 vertically long and long, a long flame is formed above and below the ignition flame hole 6 when ignited, and stability of performance is improved.

  Since the present invention is configured as described above, the gas that has flowed from the mixing chamber into the retention space through the communication hole stays in the retention space, and the sufficiently decelerated gas is discharged from the ignition flame hole. An ignition flame is formed in the ignition flame hole, and there is an effect that the ignition performance can be improved without lifting the ignition flame even if the primary air amount is increased.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. As shown in FIG. 1 and FIG. 2, the stove burner A is composed mainly of a burner cap 4 that is detachably mounted on the mixing chamber 1 of the burner body 2. The stove burner A has a large burner A1, a standard burner A2, and a small burner A3. In the case of the gas stove B in FIG. 3, the large burner A1, the standard burner A2, and the small burner A3 are added one by one. Three stove burners A are installed. The stove burner A is exposed on the top plate 10 from the opening 11 of the top plate 10 such as a glass top plate, and an annular burner ring is provided between the burner body 2 and the edge of the opening 11 of the top plate 10. 12 is interposed to prevent the broth from dropping from the top plate 10. The virtue 13 is placed on the top plate 10 so as to surround the portion exposed on the top plate 10 of the stove burner A, and a pan or the like can be placed on and supported by the virtue 13. . The standard burner A2 includes a pan bottom temperature sensor S and is exposed upward from a through hole at the center of the cover 26 described later. When the pan bottom temperature sensor S is installed on the standard burner A2, the pan bottom contacts the pan bottom to detect the temperature of the pan bottom, and various controls of the combustion of the standard burner A2 can be performed according to the detected temperature.

  The burner A has a large burner A1, a standard burner A2, and a small burner A3. These burners have basically the same structure, and in the following description, an example of the large burner A1 will be described. As shown in FIGS. 1 and 2, the burner body 2 integrally has a mixing tube 15. In this example, the burner body 2 is made of aluminum (aluminum die cast product). A gas nozzle 14 that discharges gas as fuel is disposed at the base end of the mixing tube 15. When gas is discharged from the gas nozzle 14, primary air is sucked from the base end of the mixing tube 15, and the gas and primary gas are mixed in the mixing tube 15. It is designed to be mixed with air. The burner body 2 is formed in an annular shape, and secondary air for combustion is supplied even through the inner peripheral side of the burner body 2. The burner body 2 is provided with an annular mixing chamber 1, which is in communication with a mixing tube 15. A burner base 16 is provided on the upper surface of the burner body 2, and the burner cap 4 is mounted on the burner base 16. In the case of this example, the burner cap 4 is made of aluminum.

  The burner cap 4 has a plurality of main flame hole grooves 3 radially formed in the circumferential direction on the lower surface, and the main flame hole groove is formed by placing the burner cap 4 on the burner base 16 of the burner body 2. 3, the main flame hole 5 is formed. Further, the upper surface of the burner base 16 is provided with a step portion 17 over the entire circumference, and the flame holding hole is provided over the entire periphery of the step portion 17 by placing the burner cap 4 on the burner base 16. 18 is formed. The flame holding hole 18 is formed with a gas whose flow rate is reduced and the flow rate is reduced from the mixing chamber 1 through the inflow groove 19 and the reservoir space 20. When gas is supplied from the mixing chamber 1 and ignited, a main flame having a large flame is formed in the main flame hole 5 and a small flame holding flame is formed in the flame holding hole 18 over the entire circumference. ing. In the portion corresponding to the five virtue claws 13a of the five victories 13, the interval between the adjacent main flame holes 5 is widened. ing.

  Further, an ignition flame hole 6 is provided in a part of the periphery of the burner cap 4 (in this example, a position corresponding to one virtuoso claw 13a of the virtues 13), and an ignition flame is formed in the ignition flame hole 6 Gas emitted from the flame holding hole 18 and the main flame hole 5 can be ignited. In the portion where the ignition flame hole 6 is provided, a concave curved surface 30 is provided on the outer peripheral surface of the burner cap 4, and the ignition flame hole 6 is provided at a position corresponding to the central portion of the concave curved surface 30. An ignition device 7 is attached to a portion corresponding to the ignition flame hole 6 to generate an ignition spark and ignite the gas emitted from the ignition flame hole 6. The ignition device 7 is mainly composed of an ignition plug 21 and an ignition spark target 22. The spark plug 21 is attached to the burner body 2, and the electrode 21a of the spark plug 21 protrudes upward. Above the portion of the burner cap 4 where the ignition flame hole 6 is provided, a flange portion 23 is provided so as to protrude outwardly so as to prevent boiling water or the like from entering the ignition flame hole 6. An ignition spark target 22 is provided on the lower surface of the electrode, and the electrode 21a of the ignition plug 21 and the ignition spark target 22 are opposed to each other with a predetermined gap therebetween. When gas is discharged from the ignition flame hole 6 and ignition spark is generated by the ignition device 7, the gas discharged from the ignition flame hole 6 is ignited to form an ignition flame.

  The burner cap 4 is provided with the concave curved surface 30 which is recessed from the outer circumference as described above and the ignition flame hole 6 is provided in the concave curved surface 30 as described above, but the burner base 16 of the burner body 2 also has this concave. A concave curved surface 30 ′ is provided so as to be continuous with the curved surface 30. The concave curved surfaces 30 and 30 ′ are formed in a shallow arc shape centering on the ignition spark target 22 of the flange portion 23. The ignition flame hole 6 provided in the concave curved surface 30 has a vertically long shape that is long in the vertical direction. Further, an edge 23 a is suspended from the periphery of the lower surface of the flange 23. When the concave curved surfaces 30, 30 'and the flange 23 are provided as described above, when the ignition device 7 ignites, the gas emitted from the ignition flame hole 6 tends to stay and the ignition device 7 can reliably ignite. This improves the ignition performance. Moreover, if the collar part 23 is provided, it can prevent that boiled juice etc. adhere to the ignition device 7, and ignition performance does not deteriorate. Moreover, if the edge part 23a is drooping to the collar part 23, it can prevent that boiled juice etc. do not turn to the lower surface of the collar part 23, and one layer soup etc. adhere to the ignition device 7. If the ignition flame hole 6 is vertically long, a long ignition flame is formed in the ignition flame hole 6 in the vertical direction, and the stability of performance can be improved.

  Further, in the present invention, as shown in FIGS. 5 and 6, a staying space 8 is provided between the ignition flame hole 6 and the mixing chamber 1, and the staying space 8 and the mixing chamber 1 are connected to the communication hole 9. The gas supplied from the mixing chamber 1 flows into the retention space 8 through the communication hole 9 and is temporarily retained in the retention space 8 to be discharged from the ignition flame hole 6. Yes. The staying space 8 is sufficiently deeper than the pooling space 20 and has a large volume. Two communication holes 9 are provided. Further, the communication hole 9 serving as the inlet and the ignition flame hole 6 serving as the outlet are in a positional relationship that is not positioned on a straight line in the radial direction. The area of the communication hole 9 (the total area of the plurality of communication holes 9) is smaller than the area of the ignition flame hole 6.

  Accordingly, the ignition gas supplied from the mixing chamber 1 flows into the staying space 8 from the communication hole 9 as shown by the arrow in FIG. 6, stays in the staying space 8, and is discharged from the ignition flame hole 6. The gas flow is sufficiently decelerated in the staying space 8 and discharged from the ignition flame hole 6. At this time, the communication hole 9 and the ignition flame hole 6 are not aligned in a straight line in the radial direction, and the number of the communication holes 9 on the inlet side is two, whereas the number of the ignition flame holes 6 is one. And the area of the communication hole 9 on the inlet side is smaller than the area of the ignition flame hole 6 on the outlet side, the gas flow is further decelerated in the staying space 8 so that the flow rate is slow and uniform. Discharge from the ignition flame hole 6. As a result, the gas emitted from the ignition flame hole 6 is reliably ignited, and the ignition flame formed in the ignition flame hole 6 is stabilized without being lifted, and exits from the main flame hole 5 and the flame holding hole 18 from the ignition flame. Make sure to transfer to gas.

  Further, a concave groove 25 for supplying secondary air is provided radially on the upper surface of the burner cap 4 at a position between the adjacent main flame holes 5, and for combustion supplied from the central opening of the burner body 2. The secondary air is supplied to both sides of the main flame hole 5 through the concave groove 25. As a result, the amount of secondary air for combustion supplied from the outer periphery of the burner body 2 on the top plate 10 is sufficiently reduced by supplying secondary air from the inner peripheral side through at least the concave groove 25. The secondary air is supplied for stable combustion. Further, a cover 26 is installed on the upper surface of the burner cap 4 to prevent the soup from adhering to the upper surface of the burner cap 4. The cover 26 is attached by being driven into.

It is a disassembled perspective view of an example of the stove burner of this invention. It is sectional drawing of the state which installed the burner for stoves same as the above. It is a top view of the whole gas stove which installed the burner for stove same as the above. The burner cap same as the above is shown, (a) is a plan view and (b) is a bottom view. It is the perspective view which expanded the part of the flame hole for ignition of a burner cap same as the above. It is a bottom view explaining the effect | action of the part of the ignition flame hole same as the above.

Explanation of symbols

A burner for stove
DESCRIPTION OF SYMBOLS 1 Mixing chamber 2 Burner body 4 Burner cap 5 Main flame hole 6 Ignition flame hole 7 Ignition device 8 Retention space 9 Communication hole

Claims (3)

In a stove burner in which a burner cap is placed on a burner body having an annular mixing chamber and a large number of main flame holes are provided at the periphery, an ignition flame hole is provided at a part of the periphery and the ignition flame hole annexed igniter for generating an ignition spark in the vicinity, provided the retention space by staying gas Ru slow down the discharge flow rate of the gas from the ignition flame holes between the ignition flame holes and the mixing chamber, A burner for a steamer characterized in that the mixing chamber and the staying space are communicated with each other through a communication hole, and the communication hole and the ignition flame hole are not positioned in a straight line in a radial direction.   The stove burner according to claim 1, wherein the opening area of the communication hole is smaller than the opening area of the ignition flame hole.   An ignition flame hole is provided on a concave curved surface provided on the outer periphery of the burner cap so as to be recessed on the inner peripheral side from the other portion, and the flange portion protrudes outward from the upper portion of the outer periphery of the burner cap at the position of the concave curved surface. The ignition spark target of the ignition device is provided in the collar, and there are two ignition holes for the ignition flame hole, and the ignition flame hole is a vertically long opening that is long in the vertical direction. The stove burner according to claim 1 or 2, characterized by the above-mentioned.

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