JP2014085039A - Burner for cooking stove - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner for a cooking stove capable of achieving miniaturization while suitably maintaining distribution of mixed gas in a burner body.SOLUTION: A burner body 2 is constituted by a base body part 4 and a spacer 5. The base body part 4 includes an outer cylinder 7 and an inner cylinder 8. The spacer 5 includes a placing part 14 for placing a burner head 3, and a connection part 12 connected to the outer cylinder 7. The burner head 3 has a hanging cylinder 34 in its center part. In the outer cylinder 7, the side on which an ignition plug 6 is arranged is eccentric to the inner cylinder 8 in a direction approaching to the inner cylinder 8. The inner cylinder 8 projects upward from an upper end of the outer cylinder 7.

Description

  The present invention relates to a burner for a stove used for a gas stove.

  Conventionally, a mixing pipe that supplies a mixed gas of fuel gas and primary air, a burner body that is connected to the mixing pipe, and a ring that is placed on the burner body and forms a number of flame holes along the outer periphery There is known a stove burner including a burner head of this type and a spark plug adjacent to the burner body (see Patent Document 1 below).

  In this type of stove burner, a recess for accommodating the spark plug is formed in a part of the outer peripheral portion of the burner body, and the burner head covers the electrode provided at the upper end of the spark plug from above. The exposure of the spark plug is small. Thereby, in the stove burner provided so as to be exposed from the top plate of the gas stove, the appearance can be improved and inadvertent contact with the electrodes can be prevented.

JP-A-6-185707

  However, in the above-described conventional stove burner, the distribution space of the mixed gas formed inside the burner body is reduced by providing the recess for accommodating the spark plug in the outer periphery of the burner body. In order to prevent this, it is necessary to increase the outer diameter of the burner body, but the burner head also has a larger diameter in accordance with the size of the burner body, making it difficult to make the stove burner compact.

  In view of the above, an object of the present invention is to provide a stove burner that can be downsized while maintaining a good distribution of the mixed gas in the burner body.

  The present invention relates to a mixing pipe for generating a mixed gas of fuel gas and primary air, a burner body connected to the mixing pipe, and a plurality of flame holes placed on the burner body along the outer periphery. In a stove burner comprising an annular burner head to be formed and a spark plug adjacent to the burner body, the burner body includes a base portion connected to a downstream end portion of the mixing tube, and an upper portion of the base portion. A spacer connected to the outer cylinder, and the base portion includes an annular air-fuel mixture passage formed by an outer cylinder and an inner cylinder provided inside the outer cylinder, and the spacer mounts the burner head. And a connecting part connected to the outer cylinder of the base part. The burner head extends downward from the central part along the axis and is connected to the inner cylinder. A drooping cylinder, and the outer cylinder has the spark plug Provided eccentrically with respect to the inner tube in the direction in which the side is location closer to the inner cylinder, the inner cylinder is characterized in that is provided to protrude above the upper end of the outer cylinder.

  According to the present invention, by arranging the outer cylinder eccentrically with respect to the inner cylinder in the base portion, a space for attaching the spark plug can be secured below one side of the spacer, and a compact stove burner can be configured.

  A spacer is connected to the upper end of the base portion, and an inner cylinder that protrudes above the upper end of the outer cylinder is provided inside the spacer. Thereby, even if a part of the air-fuel mixture passage becomes narrow due to the eccentricity of the outer cylinder, a sufficient distribution space of the mixed gas between the spacer and the inner cylinder can be ensured above it.

  Further, since the inner cylinder protrudes above the upper end of the outer cylinder, the visibility of the inner cylinder is improved when the burner head is removed from the upper part of the burner body by cleaning or the like. Thereby, when setting a burner head to a burner body after completion | finish of cleaning, an inner cylinder can be visually observed reliably and the operation | work which connects a drooping cylinder to an inner cylinder can be performed easily. Furthermore, since the length of the inner cylinder in the height direction is relatively long, the drooping cylinder of the burner head can be made shorter, and the weight can be reduced.

  Further, in the present invention, the spacer of the burner body is formed by die casting and provided at least partly exposed from the top plate of the stove, and the base portion of the burner body is formed of a metal plate material. It is preferable to be provided at a position below the top plate.

  By forming the spacer by die casting, the aesthetic appearance is improved, and a high deformation strength is obtained, which is suitable for exposing from the top plate. In addition, since the base portion is formed of a metal plate material, the outer cylinder and the inner cylinder are thinned, and the mixture passage is reduced due to eccentricity.

  Further, in the present invention, at least a part of the spark plug is accommodated in an interior surrounded by a peripheral wall of the spacer. According to this, the spark plug is hidden by the peripheral wall of the spacer, and the appearance can be further improved.

The perspective view which shows the burner for stove of embodiment of this invention. The principal part sectional drawing of the burner for stove of this embodiment. The top view of the burner body in this embodiment. The figure which looked at the protrusion part in this embodiment in front. The perspective view of the burner head in this embodiment. The bottom view of the burner head in this embodiment. The figure which looked at the protrusion part and receiving part in this embodiment in front. Explanatory sectional drawing which expands and shows the protrusion part and receiving part in FIG. The figure which shows the modification of a receiving part. Explanatory sectional drawing of the receiving part of FIG.

  An embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the stove burner of the present embodiment includes a mixing tube 1, a burner body 2, and a burner head 3.

  The mixing tube 1 generates a mixed gas of the fuel gas and the primary air by taking in the fuel gas ejected from a gas nozzle (not shown) together with the primary air.

  As shown in FIG. 2, a burner body 2 is connected to the downstream end of the mixing tube 1. The burner body 2 includes a base portion 4 formed of a metal plate material and a spacer 5 formed by die casting. A spark plug 6 is provided inside the spacer 5.

  The base portion 4 of the burner body 2 includes an outer cylinder 7 and an inner cylinder 8 provided inside the outer cylinder, and an annular space formed between the outer cylinder 7 and the inner cylinder 8 is a mixing tube 1. An air-fuel mixture passage 9 that communicates with the air-fuel mixture is formed.

  As shown in FIGS. 2 and 3, the outer cylinder 7 of the base portion 4 is provided eccentrically in a direction in which the side on which the spark plug 6 is disposed approaches the inner cylinder 8. Further, as shown in FIG. 2, the base portion 4 is formed with an annular bottom raised portion 10. The lower end of the inner cylinder 8 is caulked and connected to the upper end of the bottom raised portion 10. The upper end of the inner cylinder 8 protrudes upward from the upper end of the outer cylinder 7.

  A spacer 5 is connected to the upper end of the outer cylinder 7. As shown in FIG. 3, the spacer 5 is bent so that the upper end of the outer cylinder 7 is inserted into the connecting part 12, which is a communication opening formed in the bottom part 11, and the upper end part of the outer cylinder 7 is expanded. The base part 4 is connected by a bent part 13 formed by processing.

  The spacer 5 includes an annular placement portion 14 on which the burner head 3 is placed on the upper end surface. The mounting portion 14 is formed concentrically with the inner cylinder 8 of the base portion 4, but the connecting portion 12 of the spacer 5 is eccentric with respect to the mounting portion 14 so as to correspond to the outer cylinder 7 of the base portion 4. Is provided.

  As shown in FIG. 2, the spacer 5 is exposed from the top plate 15 that closes the upper surface of the stove body (not shown). The top plate 15 is provided with a burner opening 16, and an annular closing plate 17 that closes a gap formed between the burner opening 16 and the spacer 5. Since the spacer 5 is formed by die casting, it has a high aesthetic appearance and a high deformation strength, which is suitable for exposing from the top plate 15.

  A spark plug housing portion 19 for housing the spark plug 6 is provided inside the outer peripheral wall 18 of the spacer 5. The spark plug housing portion 19 forms a vertically long space along the inner surface of the outer peripheral wall 18 of the spacer 5. Inside the spark plug housing portion 19, a plug body 20 of the spark plug 6 is housed. Thereby, the spark plug 6 can be provided with almost no exposure, and the appearance can be improved.

  The spark plug housing part 19 is provided in a relatively wide space formed by decentering the outer cylinder 7 of the base body part 4 with respect to the inner cylinder 8. The spark plug 6 is attached to the spacer 5 by being screwed to a support piece 21 extending downward from a part of the outer peripheral wall 18 of the spacer 5.

  In this embodiment, as shown in part in FIGS. 1 and 3, the thermocouple 22 is incorporated at a position adjacent to the spark plug housing portion 19 of the spacer 5. The thermocouple 22 is supported by the spacer 5 via a support member 23. Since the outer cylinder 7 is eccentric with respect to the inner cylinder 8, not only the spark plug 6 but also a space for providing the thermocouple 22 can be sufficiently secured.

  Furthermore, as shown in FIGS. 2-4, the hollow protrusion part 24 which protrudes from the mounting part 14 continuously above the ignition plug accommodating part 19 is provided. As shown in FIG. 4, the protruding portion 24 includes a pair of vertical wall portions 25 facing each other with a predetermined interval in the circumferential direction of the mounting portion 14, an upper wall portion 26 covering the upper side of the spark plug 6, The electrode 28 of the spark plug 6 is housed in a space surrounded by the rear wall portion 27 (see FIG. 2).

  Further, the outer side surface (the side facing the back wall portion 27) of the projecting portion 24 that is the radially outer side of the mounting portion 14 is opened by the window portion 29. On the upper surface of the upper wall portion 26 of the projecting portion 24, a plurality of grooves to be an ignition flame hole 30 described later are formed.

  Since the electrode 28 of the spark plug 6 is accommodated in the protruding portion 24, the electrode 28 of the spark plug 6 is not exposed even if the burner head 3 is removed as shown in FIG. Thus, the electrode 28 is not accidentally contacted during cleaning or the like, and damage to the electrode 28 can be reliably prevented. In addition, it is possible to prevent the simmered juice from adhering to the spark plug 6 and its electrode 28, and to suppress the occurrence of corrosion of the electrode 28 and maintain high ignition performance over a long period of time.

  The burner head 3 is formed in an annular shape as shown in FIG. 5, and includes an annular wall 31 that is suspended from the outer periphery of the lower surface as shown in FIG. 2. As shown in FIG. 6, the annular wall 31 is formed with a plurality of grooves arranged along the circumferential direction and extending in the radial direction. When these grooves are brought into contact with the mounting portion 14 of the spacer 5 as shown in FIG. 2, many cooking flame holes 32 are formed along the outer periphery of the burner head 3.

  Further, the burner head 3 is formed with a receiving portion 33 that receives the protruding portion 24 of the spacer 5 so as to cover the upper portion and the periphery when the burner head 3 is placed on the placing portion 14 of the spacer 5. As shown in FIGS. 5 and 6, the receiving portion 33 is formed to protrude outward from the annular wall 31 (the outer peripheral end where the cooking flame hole 32 is formed) of the burner head 3. The receiving portion 33 is formed in a shape in which the width dimension along the circumferential direction of the burner head 3 gradually decreases in the protruding direction.

  A drooping cylinder 34 concentric with the annular wall 31 is provided on the inner periphery of the burner head 3. As shown in FIG. 2, the hanging cylinder 34 is inserted into the inner cylinder 8 of the base portion 4 of the burner body 2 when the burner head 3 is placed on the placement portion 14 of the spacer 5. At this time, the drooping cylinder 34 and the inner cylinder 8 form a hollow portion 35 that vertically penetrates the central portion of the burner body 2 and the burner head 3. The hollow portion 35 is provided with a pan bottom temperature sensor 36. An annular cover plate 37 is provided on the upper part of the burner head 3 to prevent foreign matter from entering the hollow portion 35.

  An annular space formed between the hanging cylinder 34 of the burner head 3 and the inner surface of the spacer 5 constitutes a distribution chamber 38 that communicates with the mixture passage 9. The mixed gas that has entered the distribution chamber 38 from the mixing pipe 1 through the mixture passage 9 is distributed in the circumferential direction of the burner head 3 and is ejected from the cooking flame hole 32.

  As shown in FIG. 2, in the base portion 4 of the burner body 2, when the outer cylinder 7 is eccentric with respect to the inner cylinder 8, one side in the radial direction of the air-fuel mixture passage 9 becomes wider and the other side (ignition The plug 6 side) becomes narrower. Therefore, in the present embodiment, the base portion 4 is formed of a metal plate material. Thereby, the outer cylinder 7 and the inner cylinder 8 become thin, and it is reduced that the air-fuel mixture passage 9 becomes narrow due to eccentricity.

  In addition, in the present embodiment, the outer cylinder 7 of the base body portion 4 is substantially enlarged upward by the spacer 5, and the inner cylinder 8 of the base body portion 4 facing it extends upward from the outer cylinder 7. The distribution space of the mixed gas can be sufficiently secured, and the distribution failure of the mixed gas with respect to the cooking flame hole 32 is prevented.

  Further, in the base portion 4, the inner cylinder 8 extends above the outer cylinder 7, whereby the vertical dimension of the drooping cylinder 34 of the burner head 3 can be shortened. Weight reduction is possible.

  As shown in FIGS. 6 and 7, the receiving portion 33 is formed in a concave shape corresponding to the protruding portion 24, and as shown in FIG. 2, the upper wall portion 26 covers the upper wall portion 26 of the protruding portion 24. The outer peripheral surface of the protrusion 24 is located on the same circumference as the outer peripheral surface of the annular wall 31 of the burner head 3. On the other hand, the upper wall covering portion 39 extends to the outside of the protruding portion 24.

  As shown in FIG. 8, the upper portion of the groove formed in the upper wall portion 26 is closed by the lower surface of the upper wall covering portion 39, and the ignition flame hole 30 is formed. In this way, the ignition flame hole 30 formed between the upper wall portion 26 of the projecting portion 24 and the upper wall covering portion 39 of the receiving portion 33 is positioned above the spark plug 6.

  Furthermore, a tip drooping portion 40 extending downward is provided at the tip of the upper wall covering portion 39. The inner surface of the tip drooping portion 40 is an inclined surface that inclines in a direction gradually moving away from the protruding portion toward the radially outer side of the burner head 3. A target 41 for forming a spark discharge with the electrode 28 of the spark plug 6 is formed on the inner surface of the tip drooping portion 40.

  As shown in FIG. 8, the tip drooping portion 40 guides the mixed gas flowing through the ignition flame hole 30 downward. Thereby, the exit of the ignition flame hole 30 is substantially formed between the lower end portion of the tip drooping portion 40 and the outer end surface of the upper wall portion 26 of the protruding portion 24. And the exit of the ignition flame hole 30 will be in the state opened so that it might face downward between the protrusion part 24 and the front-end | tip drooping part 40. FIG. The flame formed from the outlet of the ignition flame hole 30 configured as described above is located outside the cooking flame hole 32.

  Moreover, the opening area of the exit of the ignition flame hole 30 is large because the inner surface of the tip drooping portion 40 is the inclined surface. As a result, flame separation from the outlet of the ignition flame hole 30 can be prevented, and the flame during ignition can be stably obtained.

  The mixed gas flows through the passage of the ignition flame hole 30 on the upper surface side of the projecting portion 24 from between the drooping cylinder 34 which is a part of the distribution chamber 38 and the rear wall portion 27, thereby forming an electrode inside the projecting portion 24. It is jetted downward from a position higher than the electrode 28 on the outer side in the radial direction of the burner head 3 beyond the electrode 28. As described above, the mixed gas passes through a completely different passage from the spark plug housing portion 19 toward the electrode 28 of the spark plug 6, so that the spark plug is affected by the negative pressure inside the stove body. Even if the accommodating portion 19 has a negative pressure, it is possible to reliably ignite at the outlet of the ignition flame hole 30. Further, since the target 41 is formed on the inner surface of the tip drooping portion 40, the spark discharge by the electrode 28 of the spark plug 6 is formed across the outlet of the ignition flame hole 30. As a result, the mixed gas ejected from the outlet of the ignition flame hole 30 can be reliably ignited.

  Further, since the upper wall covering portion 39 of the receiving portion 33 extends to the outside of the protruding portion 24, a flame from the outlet of the ignition flame hole 30 is formed outside the cooking flame hole 32. Thereby, even if the flame formed at the exit of the ignition flame hole 30 is small, it can be reliably transferred to the cooking flame hole 32.

  As shown in FIGS. 4 to 7, on both sides of the upper wall covering portion 39 along the circumferential direction of the burner head 3, there are side hanging portions 42 that extend downward so as to cover the substantially upper half of the protruding portion 24. Is formed. The inner surface (a part of the inner surface of the side portion) of the side hanging portion 42 abuts against both vertical wall portions 25 of the protruding portion 24 from the outside.

  Thus, since the receiving part 33 surrounds the ignition flame hole 30 by the tip drooping part 40 and the side drooping part 42 provided in the upper wall covering part 39, the simmered soup or the like is used for the ignition flame hole 30. Therefore, it is possible to prevent the ignition flame 30 from being clogged and to prevent the occurrence of ignition failure. In addition, since the front and lower hanging parts 40 and the side hanging parts 42 surround the ignition flame hole 30, diffusion of the mixed gas is prevented and ignition can be performed with a relatively small amount of mixed gas.

  Further, as shown in FIG. 7, it is formed between the side inner surface located below the side hanging portion 42 of the receiving portion 33 and the lower half outer surface of the vertical wall portions 25 of the projecting portion 24. Due to the gap, a fire transfer flame hole 43 that forms a flame larger than the ignition flame hole 30 is formed.

  Thus, since the ignition flame hole 30 and the fire transfer flame hole 43 are formed between the protrusion 24 and the receiving portion 33, the structure is simple and the manufacture is easy. Moreover, since the flame hole 43 for fire transfer is formed between the ignition flame hole 30 and the cooking flame hole 32, the fire transfer from the ignition flame hole 30 to the cooking flame hole 32 can be performed more smoothly. Can do.

  Further, the outer surface of the side hanging part 42 is inclined so that the size of the upper part side of the receiving part 33 is small (see FIG. 7), and the outer surface of the tip hanging part 40 is also below the burner head 3. It is made into the shape which inclines in the direction which leaves | separates gradually from an outer periphery (refer FIG. 8).

  By the way, as shown in FIG. 2, in the receiving part 33 protruding from the outer periphery of the burner head 3, an upward flame like the cooking flame hole 32 is obtained by forming the ignition flame downward. I can't. For this reason, the cooking flame formed on the outer periphery of the burner head 3 may be interrupted at the receiving portion 33 (ignition flame hole 30), and the amount of heat may be reduced at the receiving portion 33. Even in this case, in the present embodiment, a relatively large flame can be formed on both sides of the receiving portion 33 by the flame transfer flame hole 43, so that a reduction in the amount of heat at the receiving portion 33 portion is compensated. Thus, the heat distribution on the outer periphery of the burner head 3 can be made uniform.

  Further, as shown in FIGS. 5 and 6, the receiving portion 33 is formed in a shape in which the width dimension along the circumferential direction of the burner head 3 gradually decreases in the projecting direction, so that a cooking flame hole is formed. 32 and the burning of the receiving part 33 by the flame from the flame hole 43 for a fire transfer can be reduced. Accordingly, it is possible to prevent a decrease in thermal efficiency due to the provision of the receiving portion 33 and to improve the heat distribution. Further, as shown in FIGS. 7 and 8, the receiving portion 33 according to the present embodiment has the outer surface of the side hanging portion 42 and the outer surface of the tip hanging portion 40 inclined so that the receiving portion 33 is turned. Is not only reduced, but also reduces the adhesion of boiled spilled juice and provides a beautiful appearance.

  In addition, as shown in FIG. 2, when the burner head 3 is correctly placed on the placement portion 14 of the spacer 5, the pair of protrusions 24 fit into the receiving portion 33 and the protrusion 24 is provided in the receiving portion 33. When the burner head 3 is placed on the placement portion 14 provided in the spacer 5, the burner head 3 is positioned.

  On the other hand, although not shown, when the protruding portion 24 is in an erroneous setting state where it is not received by the receiving portion 33, the posture of the burner head 3 on the burner body 2 is inclined, so that the erroneous setting state can be easily recognized. At this time, although not shown, by installing the stove burner so that the protruding portion 24 is located on the front side of the stove, it is easy for the user to see the state where the receiving portion 33 is detached from the upper portion of the protruding portion 24. It is possible to confirm the wrong set.

  In addition, in the present embodiment, the ignition flame hole 30 is formed by the upper wall portion 26 of the projecting portion 24 and the upper wall covering portion 39 of the receiving portion 33. Not formed. Therefore, according to the above configuration, it is possible to reliably prevent the stove burner from being used when the burner head 3 is incorrectly set with respect to the burner body 2.

  The burner body 2 is formed so that the protrusion 24 is positioned on the same straight line as the mixing pipe 1 (same straight line as the ejection axis of the gas nozzle outside the figure) when viewed in plan as shown in FIG. It is preferable that According to this, the mixed gas that has flowed into the distribution chamber 38 (see FIG. 2) of the burner body 2 through the mixing pipe 1 is sufficiently dispersed until reaching the ignition flame hole 30, and each cooking flame. Since the combustion flame from the holes 32 becomes uniform, a good heat distribution can be obtained.

  Further, in the present embodiment, as shown in FIG. 2, an example is provided in which the outlet of the ignition flame hole 30 is opened substantially downward by providing a tip drooping portion 40 on the upper wall covering portion 39. As shown in FIG. 9 and FIG. 10, the upper wall covering portion 39 may be provided so as to protrude outward from the protruding portion 24 without providing the tip hanging portion 40. Further, in this case, the electrode 28 of the spark plug 6 is extended outward from the window portion 29 of the protruding portion 24, and the target 41 is provided on the lower surface of the distal end portion of the upper wall covering portion 39. As a result, the outlet of the ignition flame hole 30 is opened toward the radially outer side of the burner head 3, and a spark discharge from the electrode 28 of the spark plug 6 is formed across the mixed gas ejected from the opening. Therefore, it can be surely ignited. Further, the upper wall covering portion 39 can suppress the entry of the simmered juice into the ignition flame hole 30.

  In the present embodiment, as shown in FIGS. 3 and 6, a groove is provided on the upper surface of the upper wall portion 26 of the protruding portion 24, and the upper surface of the groove is received on the lower surface of the upper wall covering portion 39 of the receiving portion 33. Although an example in which the ignition flame hole 30 is formed by covering is shown, a groove is provided on the lower surface of the upper wall covering portion 39 of the receiving portion 33, and the lower surface of the groove is formed on the projecting portion 24. The ignition flame hole 30 may be formed in contact with the upper surface.

  DESCRIPTION OF SYMBOLS 1 ... Mixing pipe, 2 ... Burner body, 3 ... Burner head, 6 ... Spark plug, 4 ... Base part, 5 ... Spacer, 7 ... Outer cylinder, 8 ... Inner cylinder, 9 ... Mixture passage, 12 ... Connection part, 14... Mounting part, 34.

Claims (3)

A mixing tube for generating a mixed gas of fuel gas and primary air, a burner body connected to the mixing tube, and an annular tube mounted on the burner body to form a number of flame holes along the outer periphery In a stove burner comprising a burner head and a spark plug adjacent to the burner body,
The burner body includes a base portion connected to the downstream end portion of the mixing tube, and a spacer connected to the base portion.
The base portion includes an annular mixture passage formed by an outer cylinder and an inner cylinder provided inside the outer cylinder,
The spacer includes a mounting portion for mounting the burner head, and a connecting portion connected to the outer cylinder of the base portion,
The burner head includes a cylindrical drooping cylinder that extends downward along the axis from the center thereof and is connected to the inner cylinder,
The outer cylinder is provided eccentric to the inner cylinder in a direction in which the side on which the spark plug is disposed approaches the inner cylinder,
The burner for a stove, wherein the inner cylinder is provided so as to protrude upward from the upper end of the outer cylinder. The spacer of the burner body is formed by die casting, and at least a part thereof is exposed from the top plate of the stove,
The burner body burner according to claim 1, wherein the base portion of the burner body is formed of a metal plate and is provided at a position below the top plate of the stove.   The stove burner according to claim 1 or 2, wherein at least a part of the spark plug is accommodated in an interior surrounded by a peripheral wall of the spacer.

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