JP2005257153A - Stove burner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the reduction of secondary air supplied to a burning part of an internal burner port due to the influence of draft caused by flames from an external burner port. <P>SOLUTION: In a stove burner comprising a burner main body 31 comprising a hollow base part 32, a plurality of hollow column parts 33 which stand on the upper surface of the base part at intervals in the peripheral direction, and a hollow annular head part 34 supported on the upper side of the base part via these column parts, wherein an external burner port 35 and an internal burner port 36 are provided on the external and internal peripheral parts of the head part, and secondary air is supplied to a burning portion of the internal burner port via an air passage 37 constituted by spaces among the column parts between the base part and head part, an annular hood part 38 positioned below the external peripheral burner port 35 and protruding outward is provided on the outer periphery of the head part 34 to shut off the influence of draft caused by flames from the external burner port 35 on air streams toward the air passage. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a burner for a stove having an external flame hole and an internal flame hole located radially inward from the external flame hole.

  Originally, in this type of stove burner, the burner body connected to the mixing tube is formed in a hollow ring shape, and the outer flame hole and the inner flame hole on the inner circumference side are provided in the burner body. However, in this case, there is a problem that boiled spilled juice falls into the stove body through the inner diameter part of the burner body (the space surrounded by the burner body).

  Therefore, conventionally, the burner main body has a hollow base portion connected to the mixing tube, a plurality of hollow strut portions erected on the upper surface of the base portion with a circumferential interval, and through these strut portions. It is supported on the upper side of the base part, and is configured to have a hollow annular head part in which the air-fuel mixture from the mixing tube is supplied via the internal space of the base part and the internal space of the column part. A stove burner is also known in which an outer flame hole and an inner flame hole are provided on the outer peripheral side and the inner peripheral side, respectively (see, for example, Patent Document 1).

  In this burner, the boiled juice falling on the inner diameter portion of the head portion can be received by the base portion, and the falling of the boiled juice into the stove body is prevented. When the base is provided, unlike the case where the burner body is formed in an annular shape, secondary air cannot be supplied from the stove body to the combustion portion of the air-fuel mixture ejected from the internal flame hole. Secondary air is supplied from the outside of the burner body to the combustion portion of the internal flame hole via an air passage formed by a gap between the support portions between the base portion and the head portion.

  The hollow annular head portion is provided with only an external flame hole, and a cylindrical second head portion that is integral with or separated from the base portion is disposed in a space surrounded by the head portion. A stove burner is also known in which an internal flame hole is provided in the head portion of this. Even in this case, secondary air is supplied from the outside of the burner body to the combustion portion of the internal flame hole through an air passage formed by a gap between each support portion between the base portion and the head portion.

However, the air from the outside of the burner body tends to flow toward the external flame hole by the draft of the flame of the external flame hole, and the secondary air supplied to the combustion portion of the internal flame hole tends to be insufficient. In addition, the simmered juice that has fallen on the base part flows out of the base part through the air passage, but the outer end part of the air passage located on the outer peripheral side of the base part receives heat from the flame of the external flame hole. In order to receive, boiled juice is easily stuck to the outer end of the air passage. Since the spilled boiled sorghum can not be easily removed, the clogged stubs at the outer end of the air passage prevent the boiled spilled juice from being discharged from the air passage, and the spilled scum gradually accumulates in the air passage. Thus, the air passage is narrowed, and this also tends to cause shortage of secondary air supplied to the combustion portion of the internal flame hole.
JP 55-33528 A

  In view of the above points, the present invention can sufficiently supply secondary air to the combustion portion of the internal flame hole through an air passage formed by a gap between each support portion between the base portion and the head portion. In addition, an object of the present invention is to provide a stove burner that can suppress sticking of boiled spilled juice to the air passage.

  In order to solve the above-mentioned problem, in the present invention, a burner for a stove having an external flame hole and an internal flame hole located radially inward from the external flame hole, the hollow base portion connected to the mixing pipe A plurality of hollow struts erected on the upper surface of the base portion with circumferential spacing, and supported by the upper side of the base portion via these strut portions, and the air-fuel mixture from the mixing tube A burner body having a hollow annular head portion supplied via an internal space and an internal space of a support column is provided, and an external flame hole and an internal flame hole are provided on the outer peripheral side and the inner peripheral side of the head portion, respectively. Alternatively, an external flame hole is provided on the outer peripheral side of the head part, a cylindrical second head part is arranged in a space surrounded by the head part, and an internal flame hole is provided in the second head part. Between the struts between the base part and the head part in the combustion part of the air-fuel mixture ejected from the flame hole In supplies the secondary air through the air passage formed in the air gap, the outer periphery of the head portion, and is positioned below the external burner ports, it is provided eave portion of the annular projecting outward.

  According to said structure, the air from the outside of a burner main body is divided into the flow which goes to an external flame hole, and the flow which goes to an air path by a collar part. Since the air flow toward the air passage is formed on the lower side of the flange, air smoothly flows into the air passage without being affected by the draft due to the flame of the external flame hole above the flange. Therefore, the secondary air is sufficiently supplied to the combustion portion of the air-fuel mixture ejected from the internal flame hole via the air passage.

  In addition, the collar portion also functions as a heat shield member that prevents heat from the flame of the external flame from reaching the outer end portion of the air passage, and the squeezed juice is less likely to stick to the outer end portion of the air passage. Therefore, the narrowing of the air passage due to the accumulation of sticky soot can be effectively prevented, and secondary air can be satisfactorily supplied over a long period to the combustion portion of the air-fuel mixture ejected from the internal flame hole.

  In addition, it is desirable to form a concave groove extending in the radial direction of the base portion on the bottom surface of each air passage. According to this, the simmered juice falling on the base member is smoothly discharged to the outside of the base member through the concave groove. And even if the boiled spilled juice is stuck, the place where the stuck candy is deposited is a concave groove, so that the shortage of secondary air supply due to the narrowing of the air passage can be prevented as much as possible.

  Moreover, you may place the soup saucer for burners in the upper surface part of the base part which faces the space enclosed with a head part. According to this, the boiled juice dropped on the inner diameter portion of the head portion is received by the burner juice tray, and the boiled juice does not flow into the air passage unless overflowing from the juice tray. Therefore, sticking of boiled juice to the air passage can be prevented, and the burner body can be easily maintained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a plan view of the burner according to the first embodiment of the present invention, FIG. 2 is a cross-sectional view of the burner according to the first embodiment cut along the line II-II in FIG. 1, and FIG. 3B is a sectional view taken along the line IIIb-IIIb of FIG. 3A, FIG. 4 is a sectional view of the burner of the third embodiment, and FIG. 5 is the fourth embodiment. FIG. 6 is a cross-sectional view of the burner of the fifth embodiment.

  Referring to FIG. 2, reference numeral 1 denotes a stove body, and 2 is a top plate that covers the upper surface of the stove body 1. The top plate 2 is provided with an opening 4 for allowing the burner 3 provided on the stove body 1 to face. The top plate 2 is formed of a thick plate made of metal such as aluminum or a glass plate, and has a ring 5 attached to the peripheral edge of the opening 4 so as to project on the packing 5 into the opening 4. 6 and 7 virtues are placed.

  The burner 3 includes a mixing tube 30 that is fixed to the stove body 1 via a frame 1 a and a burner body 31 that is continuous with the mixing tube 30. The downstream end of the mixing tube 30 faces the inner peripheral space of the juice receiving tray 6, and the burner body 31 is detachably attached to the downstream end of the mixing tube 30 while being exposed above the juice receiving tray 6.

  Referring also to FIG. 1, the burner main body 31 includes a hollow disk-shaped base portion 32 having a diameter larger than the inner diameter of the soup pan 6, and a plurality of erected on the upper surface of the base portion 32 with an interval in the circumferential direction. A hollow supporting column 33 and a hollow annular head unit 34 supported on the upper side of the base unit 32 through the supporting column 33 are provided. A cylindrical inflow port 32 a that is fitted to the downstream end of the mixing tube 30 is suspended from the central portion of the lower surface of the base portion 32, and the burner body 31 is attached to and detached from the downstream end of the mixing tube 30 at the inflow port 32 a. Can be installed freely. Then, an air-fuel mixture (mixed gas of fuel gas and primary air) from the mixing pipe 30 is supplied to the internal space of the head portion 34 via the internal space of the base portion 32 and the internal space of the support column portion 33. ing.

  The head part 34 is composed of a lower half part formed integrally with the base part 32 and the column part 33, and an upper half part composed of a burner cap 34a detachably mounted on the lower half part. On the lower surface of the burner cap 34a, a large number of teeth are suspended from the outer peripheral portion and the inner peripheral portion, respectively. Thus, in the head portion 34, an external flame hole constituted by a gap between teeth on the outer peripheral portion of the burner cap 34a and an external flame hole constituted by a gap between teeth on the inner peripheral portion of the burner cap 34a. 35 and an internal flame hole 36 positioned radially inward from the inner space 35, and the air-fuel mixture supplied to the internal space of the head portion 34 is ejected from the external flame hole 35 and the internal flame hole 36. An ignition target 34b is screwed to the burner cap 34a at one location around the burner cap 34a. An ignition plug 8 facing the target 34b is provided, and a gas mixture discharged from the external flame hole 35 is ignited by a spark discharge between the ignition plug 8 and the target 34b, and an internal flame hole is caused by the flame of the external flame hole 35. The air-fuel mixture from 36 is ignited and ignited.

  Secondary air is supplied from the outside of the burner body 31 to the combustion portion of the air-fuel mixture ejected from the external flame hole 35 (hereinafter referred to as the combustion portion of the external flame hole 35), and is ejected from the internal flame hole 36. A burner of the air-fuel mixture (hereinafter referred to as a combustion portion of the internal flame hole 36) is burnered via an air passage 37 formed by a gap between the support portions 33 between the base portion 32 and the head portion 34. Secondary air is supplied from the outside of the main body 31.

  Here, on the outer periphery of the head portion 34, an annular flange portion 38 is formed so as to be positioned below the external flame hole 35 and project outward. Therefore, the air from the outside of the burner body 31 is divided into a flow toward the combustion portion of the external flame hole 35 and a flow toward the air passage 37 by the flange portion 38 as indicated by an arrow in FIG. Since the air flow toward the air passage 37 is formed on the lower side of the flange portion 38, the air smoothly flows into the air passage 37 without being influenced by the draft of the external flame hole 35 above the flange portion 38. Flows in. Therefore, the secondary air is sufficiently supplied to the combustion portion of the internal flame hole 36 via the air passage 37, and the combustion failure due to the shortage of the secondary air does not occur.

  In addition, when spilled from the cooking container on Gotoku 7 occurs, the simmered juice may fall into the space surrounded by the head part 34 (hereinafter referred to as the inner diameter part of the head part 34). The boiled juice is received by the base portion 32 and discharged from the base portion 32 to the juice receiving tray 6 through the air passage 37. And in order to discharge | emit boiled juice easily, the upper surface of the base part 32 is formed in the convex surface which inclines below toward radial direction outward.

  By the way, if there is no flange 38, the outer end portion of the air passage 37 located on the outer peripheral side of the base member 32 is heated by the heat from the flame of the external flame hole 35. Boiled spilled juice easily sticks to the part. The sticky boiled sorghum juice cannot be easily removed, and the sticky sticky remains at the outer end of the air passage 37. Then, when the spilled boiled juice from the air passage 37 is hindered by the stick with the stick at the outer end portion of the air passage 37, and the spilling is repeated, the stick with the stick gradually accumulates in the air passage 37. The secondary air that is narrowed and supplied to the combustion portion of the internal flame hole 36 may be insufficient.

  On the other hand, in the present embodiment, since the flange portion 38 exists, it is possible to prevent heat from the flame of the external flame hole from reaching the outer end portion of the air passage 37, and boiled soup is formed at the outer end portion of the air passage 37. It becomes difficult to stick. Therefore, the narrowing of the air passage 37 due to the accumulation of sticky soot can be effectively prevented, and secondary air can be satisfactorily supplied to the combustion portion of the internal flame hole 36 over a long period of time.

  The flange portion 38 is formed with a notch 38a at one location for receiving the spark plug 8, and a through hole through which a flame detecting element (not shown) such as a thermocouple is inserted adjacent to the notch 38a. 38b is formed.

  By the way, it is conceivable to form the flange only in the portion where the air passage 37 exists, but in this case, air is introduced into the combustion portion of the external flame hole 35 from the gap between the flanges by the draft due to the flame of the external flame hole 35. And the inflow efficiency of air into the air passage 37 is deteriorated. Further, the heat of the flame of the external flame hole 35 reaches the outer end portion of the air passage 37 through the gaps between the flanges, and it becomes impossible to effectively prevent the boiled juice from sticking. Therefore, it is necessary to form the collar portion 38 in an annular shape that extends over substantially the entire circumference of the head portion 34.

  FIG. 3 shows a second embodiment. The difference from the first embodiment is that a concave groove 37 a extending in the radial direction of the base member 32 is formed on the bottom surface of the air passage 37. According to this, the boiled juice falling on the base member 32 is smoothly discharged to the outside of the base member 32 along the concave groove 37a. And even if the boiled spilled juice sticks, the place where the sticky rice cake accumulates is the concave groove 37a, so that the supply of secondary air due to the narrowing of the air passage 37 can be prevented as much as possible. The concave groove 37 a is desirably formed over a portion facing the inner diameter portion of the head portion 34 in order to suppress accumulation of wrinkles with sticking at the inner end portion of the air passage 37.

  FIG. 4 shows a third embodiment. In this device, the upper surface portion of the base portion 32 facing the inner diameter portion of the head portion 34 is recessed, and the burner soup pan 39 is detachably mounted on this portion. Therefore, the boiled juice dropped on the inner diameter portion of the head portion 34 is received by the burner juice receiving tray 39, and the boiled juice does not flow into the air passage 37 unless it overflows from the juice receiving tray 39. Therefore, it is possible to prevent the boiled juice from sticking to the air passage 37, and the burner body 31 can be easily maintained.

  In the above embodiment, the upper half portion of the head portion 34 is configured by the detachable burner cap 34a. However, the upper half portion can be integrally formed with the lower half portion. Further, in the above embodiment, the internal flame hole 36 is provided on the inner peripheral surface of the head portion 34, but the internal flame hole may be provided in a portion near the inner peripheral edge of the upper surface of the head portion 34.

  Moreover, in the said embodiment, although the external flame hole 35 and the internal flame hole 36 are provided in the head part 34, like 4th Embodiment shown in FIG. 5, and 5th Embodiment shown in FIG. A cylindrical second head portion 34 ′ is disposed on the inner diameter portion 34, only the outer outer flame hole 35 is provided on the head portion 34, and the inner flame hole 36 is provided on the second head portion 34 ′. May be. Note that the upper end of the second head portion 34 'is composed of a detachable burner cap 34'a, and an internal flame hole is formed by a number of gaps between teeth provided on the outer periphery of the lower surface of the burner cap 34'a. 36 is formed.

  Even in this case, the combustion part of the internal flame hole 36 is provided in two parts from the outside of the burner body 31 through the air passage 37 formed by the gaps between the support parts 33 between the base part 32 and the head part 34. Secondary air is supplied. Further, an annular flange portion 38 is provided on the outer periphery of the head portion 34 so as to be positioned below the outer flame hole 35 and project outward, so that the combustion portion of the inner flame hole 36 is interposed via the air passage 37. The secondary air is sufficiently supplied, and the sticking of the boiled juice to the outer end of the air passage 37 is suppressed.

  Here, in the fourth embodiment, the second head portion 34 ′ is integrally projected at the center of the upper surface of the base portion 32 so as to communicate with the internal space of the base portion 32, and mixed from the mixing tube 30. Gas is ejected from the internal flame hole 36 through the internal space of the base portion 32 and the internal space of the second head portion 34 '. On the other hand, in the fifth embodiment, although the second head portion 34 ′ is integrally projected at the center of the upper surface of the base portion 32, the base portion 32 is continuous with the lower end of the second head portion 34 ′. The communication pipe part 34 ′ b is integrally formed so as to penetrate the base part 32 and protrude downward, and the lower end part of the communication pipe part 34 ′ b is connected to the mixing pipe 30 ′ different from the mixing pipe 30. Removably connected. Accordingly, the burner 3 according to the fifth embodiment is a parent-child burner that supplies the air-fuel mixture from the separate mixing tubes 30 and 30 ′ to the external flame hole 35 and the internal flame hole 36. In this case, the inlet 32a of the base portion 32 connected to the mixing tube 30 is provided in a portion away from the center portion of the lower surface.

  In the case of the parent-child burner method, the base portion 32 is formed in a hollow ring shape, and the second head portion 34 ′ formed separately from the base portion 32 is fitted to the inner periphery of the base portion 32. Also good. In this case, the outer diameter of the burner cap 34 ′ a at the upper end of the second head portion 34 ′ is made larger than the inner diameter of the base portion 32, and the simmered juice dropped on the burner cap 34 ′ a is dropped onto the base portion 32. So that

  Further, in the fourth and fifth embodiments, a concave groove 37a extending in the radial direction of the base member 32 may be formed on the bottom surface of the air passage 37 as in the second embodiment. As in the third embodiment, the burner soup pan 39 may be detachably mounted on the upper surface portion of the base portion 32 facing the inner diameter portion of the head portion 34. However, the juice receiving tray 39 is formed in an annular shape so that the second head portion 34 ′ is inserted into the inner periphery thereof. Then, the outer diameter of the burner cap 34 ′ a at the upper end of the second head portion 34 ′ is made larger than the inner diameter of the burner soup tray 39, and the spilled juice dropped on the burner cap 34 ′ a is dropped onto the soup pan 39. To be.

  In the fourth and fifth embodiments, although not shown in the drawing, for example, to transfer the fire from the external flame hole 35 to the internal flame hole 36 at a position close to the target 34b on the inner peripheral side of the head portion 34, for example. It is desirable to provide a flame transfer flame hole.

The top view of the burner of 1st Embodiment of this invention. Sectional drawing in the stove mounting state of the burner of 1st Embodiment cut | disconnected by the II-II line | wire of FIG. (a) Sectional drawing of the burner of 2nd Embodiment, (b) IIIb-IIIb sectional view taken on the line of Fig.3 (a). Sectional drawing of the burner of 3rd Embodiment. Sectional drawing of the burner of 4th Embodiment. Sectional drawing of the burner of 5th Embodiment.

Explanation of symbols

  3 ... burner for stove, 30 ... mixing tube, 31 ... burner main body, 32 ... base part, 33 ... column part, 34 ... head part, 34 '... second head part, 35 ... external flame hole, 36 ... internal flame Hole, 37 ... air passage, 37a ... groove, 38 ... buttock, 39 ... burner tray for burner.

Claims (4)

A stove burner having an external flame hole and an internal flame hole located radially inward from the external flame hole, and a hollow base portion connected to the mixing pipe, and a circumferential interval on the upper surface of the base portion A plurality of hollow struts that are erected and supported on the upper side of the base portion via these strut portions, and the air-fuel mixture from the mixing tube passes through the internal space of the base portion and the internal space of the strut portion Combustion portion of an air-fuel mixture that has a burner body having a hollow annular head portion to be supplied, has an outer flame hole and an inner flame hole on the outer peripheral side and inner peripheral side of the head portion, respectively, and is ejected from the inner flame hole In which secondary air is supplied via an air passage formed by a gap between each support portion between the base portion and the head portion,
A burner for a stove, characterized in that an annular flange portion is provided on the outer periphery of the head portion so as to be positioned below the external flame hole and project outward. A stove burner having an external flame hole and an internal flame hole located radially inward from the external flame hole, and a hollow base portion connected to the mixing pipe, and a circumferential interval on the upper surface of the base portion A plurality of hollow struts that are erected and supported on the upper side of the base portion via these strut portions, and the air-fuel mixture from the mixing tube passes through the internal space of the base portion and the internal space of the strut portion A burner body having a hollow annular head portion to be supplied, providing an external flame hole on the outer peripheral side of the head portion, and disposing a cylindrical second head portion in a space surrounded by the head portion, An internal flame hole is provided in the second head portion, and a secondary portion is provided via an air passage formed by a gap between each support portion between the base portion and the head portion in the combustion portion of the air-fuel mixture ejected from the internal flame hole. In what supplies air,
A burner for a stove, characterized in that an annular flange portion is provided on the outer periphery of the head portion so as to be positioned below the external flame hole and project outward.   The stove burner according to claim 1 or 2, wherein a concave groove extending in a radial direction of the base portion is formed on a bottom surface of each air passage.   The burner for a stove according to claim 1 or 2, wherein a soup pan for a burner is placed on an upper surface portion of the base portion facing a space surrounded by the head portion.

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