CN105283710B - stove burner - Google Patents

Abstract

The present invention relates to a stove burner, comprising: a burner head (3); a mixing tube (5) connected to the burner head; and a gas nozzle (6) having a nozzle hole (6a) for ejecting gas toward an inlet (5a) of the mixing pipe, wherein the burner has a cylindrical air damper (7) for restricting the amount of primary air sucked into the mixing pipe, and wherein the central axis of the air damper is aligned with the hole axis of the nozzle hole, so that the gas mixture having a uniform air-fuel ratio is ejected from the plurality of flame ports (3a) in the outer peripheral portion of the burner head. The bottom end portion of the air damper (7) is mounted on the gas nozzle (6) so that the central axis of the air damper (7) coincides with the hole axis of the nozzle hole (6 a). The primary air is sucked into the mixing pipe (5) through an axial gap formed between the front end of the air damper (7) and the inlet portion (5a) of the mixing pipe (5), and the air damper (7) is positioned axially forward relative to the gas nozzle (6).

Description

stove burner

technical field

The present invention relates to a stove burner comprising: a burner head having a plurality of flame ports on the outer periphery; a mixing tube connected to the burner head; and a gas nozzle having a nozzle for ejecting gas toward the inlet of the mixing tube hole.

Background technique

Conventionally, as such a stove burner, a stove burner having a cylindrical air damper for controlling the amount of primary air sucked in from the inlet of the mixing tube is known (for example, refer to Patent Document 1). In this stove burner, a part of the air damper is inserted into the mixing tube, and the primary air is sucked into the mixing tube through the axial gap formed between the end of the air damper protruding from the mixing tube and the gas nozzle. Tube.

Furthermore, in Patent Document 1, it is described that a mechanism for pressing and fixing the air damper by screws radially screwed in from the outer surface of the mixing tube is provided, and that the air damper is moved in conjunction with an operator arranged on the stove top. A linkage mechanism in which the damper moves in the axial direction, so that the amount of suction of primary air can be adjusted by operating the operator. Furthermore, recently, the user is required not to operate outside the stove and change the intake volume of the primary air without authorization, so that the method of moving the air damper through the interlocking mechanism is no longer used.

However, in order to spray a mixture of uniform air-fuel ratio (a mixture of gas and primary air) from the multiple flame ports on the outer periphery of the burner head for good combustion, it is necessary to align the central axis of the air damper with the hole of the nozzle hole. The axes are aligned. However, when the air damper is fixed to the mixing tube by screws as in the above-mentioned conventional example, the air damper is tilted depending on how the screws are fastened, and the center axis of the air damper is tilted with respect to the hole axis of the nozzle hole. Furthermore, even with the structure using the above-mentioned interlocking mechanism, the air damper is inclined only by the amount of the sliding gap with respect to the mixing tube, so it is difficult to align the central axis of the air damper with the hole axis of the nozzle hole.

Prior art literature

patent documents

Patent Document 1: Japanese Publication No. 60-5229

Contents of the invention

Summary of the invention

The problem to be solved by the invention

The present invention is proposed in view of the above points, and its purpose is to provide a stove burner, which can make the central axis of the air damper coincide with the hole axis of the nozzle hole, so that Multiple flame ports at the top spray out the air-fuel mixture with uniform air-fuel ratio.

means of solving problems

In order to solve the above-mentioned problems, the stove burner of the present invention has: a burner head having a plurality of flame ports on the outer periphery; a mixing tube connected to the burner head; The gas nozzle hole, the stove burner is equipped with a cylindrical air damper to limit the amount of primary air sucked into the mixing tube. It is characterized in that: the central axis of the air damper is consistent with the hole axis of the nozzle hole The bottom end is installed on the gas nozzle, the primary air is sucked into the mixing tube through the axial gap formed between the front end of the air damper and the inlet of the mixing tube, and the air damper is located axially forward relative to the gas nozzle.

According to the present invention, by installing the bottom end of the air damper on the gas nozzle, the positional relationship of the air damper relative to the gas nozzle is ensured, so that the central axis of the air damper can be accurately aligned with the hole axis of the nozzle hole . Therefore, the primary air sucked in through the gap in the axial direction between the tip of the air damper and the inlet portion of the mixing tube is uniformly distributed over the entire periphery of the airflow ejected from the nozzle hole. As a result, air-fuel mixture with a uniform air-fuel ratio can be ejected from the plurality of flame ports on the outer peripheral portion of the burner head, resulting in a good combustion state.

Furthermore, as a method of attaching the bottom end of the air damper to the gas nozzle, a method in which the bottom end of the air damper is screwed to the outer periphery of the gas nozzle, and the bottom of the air damper The end is formed with a curved edge bent radially inward, and the curved edge is sandwiched between a nozzle holding member for screwing the gas nozzle and a flange formed on the outer periphery of the nozzle or a flange formed on the outer periphery of the gas nozzle Part and the pressing member screwed on the outer periphery of the gas nozzle from the axial front. In particular, by screwing the bottom end of the air damper to the outer peripheral surface of the gas nozzle, the air damper advances and retreats in the axial direction through its rotation, thereby changing the distance between the front end of the air damper and the inlet of the mixing tube. The amount of clearance in the axial direction can adjust the suction amount of primary air, which is beneficial.

Description of drawings

Fig. 1 is a perspective view of a stove burner according to a first embodiment of the present invention.

Fig. 2 is a sectional view taken along line II-II in Fig. 1 .

Fig. 3 is a sectional view of a stove burner according to a second embodiment.

Fig. 4 is a perspective view of an air damper provided in a stove burner according to a second embodiment.

Fig. 5 is a sectional view of a stove burner according to a third embodiment.

Reference signs:

1: Burner support seat 2: Stove burner

3: Burner head 3a: Flame port

3b: Annular ridge 3c: Annular wall

4: Burner cover 4a: Back plate

4b: fixed chip 5: mixing tube

5a: Inlet section 6: Gas nozzle

6a: Nozzle hole 6b: Wedge

6c: Flange 6c': Segment

6d: Cylindrical part 61: Nut

7: Air damper 7a: Bend lip

71: First cylindrical member 71a: Tongue portion

71b: hole 72: second cylindrical member

72a: Vertical hole 72b, 72c: Horizontal hole

11: Base part 11a: Gas channel

12: pillar part 13: upper plate part

13a: support barrel

detailed description

Referring to FIGS. 1 and 2 , 1 indicates a burner support seat provided in a stove body (not shown), and a stove burner 2 is supported by the burner support seat 1 . The burner support base 1 has: a base part 11, which is used as a nozzle holding member for installing the gas nozzle 6 described later; a pillar part 12, which is erected at one end of the base part 11; It protrudes to face the base portion 11 .

The stove burner 2 is equipped with: a burner head 3, which has a plurality of flame ports 3a on the outer periphery, and is circular in plan view; a burner cover 4, which is placed on the burner head 3, and is in the shape of a disc; a mixing tube 5, and a gas nozzle 6 having a nozzle hole 6 a for ejecting gas toward the inlet 5 a at the lower end of the mixing tube 5 . The gas nozzle 6 is screwed to the upper surface of the base portion 11 of the burner support base 1 , and gas is supplied to the gas nozzle 6 through the gas passage 11 a formed in the base portion 11 .

Moreover, the support cylinder part 13a concentric with the gas nozzle 6 (the hole axis|shaft of the nozzle hole 6a) is formed in the upper plate part 13 of the burner support base 1. As shown in FIG. Then, the burner head 3 is supported while being centered on the burner support base 1 by fitting the mixing tube 5 into the support cylinder portion 13 a such that the gas nozzle 6 and the mixing tube 5 are coaxially located. In addition, the mixing tube 5 does not have a Venturi tube (Venturi) whose diameter is reduced with respect to the inlet part 5a, and primary air is sucked in from the inlet part 5a by the radial venturi effect (radial venturi effect) mentioned later.

The burner head 3 has an annular raised portion 3b protruding upward from an opening edge portion at the upper end of the mixing tube 5 and an annular wall 3c protruding upward from an upper peripheral portion. In the circumferential direction of the annular wall 3c, a plurality of groove-shaped flame ports 3a recessed downward from the upper end surface thereof are formed at intervals.

A back plate 4 a facing the upper end surface of the protruding portion 3 b at a predetermined distance is attached to the lower surface of the burner cover 4 . In the circumferential direction of the outer periphery of the back plate 4a, a plurality of fixed pieces 4b are vertically provided at intervals, and the lower ends of these fixed pieces 4b are abutted against the outer peripheral surface of the raised portion 3b, so that the burner cover 4 is positioned relative to the burner head 3. fixed core.

When the gas is ejected from the gas nozzle 6, the gas flow flowing into the burner head 3 through the mixing tube 5 hits the bottom of the back plate 4a and spreads radially, causing the so-called Venturi effect, thereby inhaling from the inlet 5a of the mixing tube 5. Air once. Then, the mixture of gas and primary air is ejected from the flame ports 3 a on the outer periphery of the burner head 3 , and the mixture is bunsen-combusted by supplying secondary air from the outside of the burner head 3 .

In addition, the stove burner 2 has a cylindrical air damper 7 to restrict the amount of primary air sucked into the mixing tube 5 to an appropriate amount according to the type of gas. In this embodiment, the bottom end (lower end) of the air damper 7 is attached to the gas nozzle 6 . Furthermore, the primary air is sucked into the mixing tube 5 through the axial gap formed between the front end (upper end) of the air damper 7 and the inlet portion 5a of the mixing tube 5, and the air damper 7 is positioned axially forward with respect to the gas nozzle 6. . Hereinafter, this point will be described in detail.

The gas nozzle 6 has a cylindrical portion 6d smaller in diameter than the flange portion 6c between the wedge portion 6b forming the tip of the nozzle hole 6a and the intermediate flange portion 6c seated on the base portion 11 . External threads are formed on the outer peripheral surface of the cylindrical portion 6d. Also, internal threads corresponding to the external threads are formed on the inner peripheral surface of the air damper 7, and the bottom end portion of the air damper 7 is screwed to the outer periphery of the cylindrical portion 6d.

As mentioned above, if the bottom end of the air damper 7 is installed on the gas nozzle 6, the positional relationship of the air damper 7 relative to the gas nozzle 6 can be ensured, and the central axis of the air damper 7 can be aligned with the nozzle hole 6a. The bore axes are exactly the same. Therefore, the primary air sucked in through the axial gap between the front end of the air damper 7 and the inlet portion 5a of the mixing tube 5 is uniformly distributed over the entire periphery of the airflow ejected from the nozzle hole 6a. As a result, an air-fuel mixture with a uniform air-fuel ratio can be ejected from the plurality of flame ports 3a on the outer peripheral portion of the burner head 3, resulting in a good combustion state.

In addition, in this embodiment, since the air damper 7 is screwed to the gas nozzle 6, the air damper 7 can be moved forward and backward in the axial direction by the rotation thereof. Therefore, the intake amount of primary air can be adjusted by changing the gap amount in the axial direction between the front end of the air damper 7 and the inlet portion 5 a of the mixing tube 5 .

Next, a second embodiment shown in FIGS. 3 and 4 will be described. The basic structure of the stove burner 2 of the second embodiment is not particularly different from the above-mentioned first embodiment, and the same components and parts as those of the first embodiment are assigned the same reference numerals as above.

The second embodiment differs from the first embodiment in the portion where the air damper 7 is attached to the gas nozzle 6, and the configuration of the air damper 7, which will be described in detail below. In the second embodiment, an annular curved edge portion 7 a curved radially inward is formed at the bottom end (lower end) of the air damper 7 . Furthermore, the bottom end portion of the air damper 7 is attached to the gas nozzle 6 by sandwiching the bent edge portion 7 a between the base portion 11 and the flange portion 6 c of the gas nozzle 6 . Furthermore, in the structure shown in FIG. 3 , a step portion 6c' protruding from the base portion 11 by the plate thickness of the bent edge portion 7a is formed on the outer peripheral portion of the lower surface of the flange portion 6c, and the step portion 6c' and the The curved edge portion 7a is sandwiched between the base portions 11 . In addition, the gas nozzle 6 does not have the cylindrical portion 6d of the first embodiment.

In the second embodiment, the bottom end of the air damper 7 is also installed on the gas nozzle 6. Therefore, the same as the first embodiment, the central axis of the air damper 7 can be aligned with the hole of the nozzle hole 6a. The shafts are aligned, so that a mixture with a uniform air-fuel ratio can be sprayed from the plurality of flame ports 3a on the outer peripheral portion of the burner head 3 .

In addition, in the second embodiment, the air damper 7 is composed of the first cylindrical member 71 forming the bottom end side (lower side) of the curved edge portion 7a and the front end side (upper side) of the first cylindrical member 71 which is externally inserted. ) The second cylindrical member 72 constitutes. Tongue portions 71 a protruding radially outward are bent at two places in the circumferential direction on the upper end of the first cylindrical member 71 . In addition, a vertical hole 72a into which the tongue piece 71a can be inserted from below and two upper and lower holes extending from one edge of the vertical hole 72a in the circumferential direction to one side in the circumferential direction are formed at two places in the circumferential direction of the second cylindrical member 72 . Sectional horizontal holes 72b, 72c. Then, the length of the air damper 7 can be switched to three stages by selectively engaging the tongue portion 71a with the upper end of the vertical hole 72a, the upper horizontal hole 72b, and the lower horizontal hole 72c. Thus, the amount of axial gap between the front end of the air damper 7 (the upper end of the second cylindrical member 72 ) and the inlet portion 5 a of the mixing tube 5 can be changed, thereby adjusting the amount of suction of primary air into the mixing tube 5 .

Furthermore, the second cylindrical member 72 is formed with a larger diameter close to the diameter of the lower end of the mixing tube 5 , and when a large amount of boil-over occurs, the boil-over soup may intrude into the air damper 7 from the second cylindrical member 72 . For this reason, a hole 71b is formed in the lower portion of the peripheral surface of the first cylindrical member 71, and the boiled soup that has invaded into the air damper 7 can be discharged through the hole 71b.

Next, a third embodiment shown in FIG. 5 will be described. The basic structure of the stove burner 2 of the third embodiment is not particularly different from the above-mentioned first embodiment, and the same components and parts as those of the first embodiment are assigned the same reference numerals as above.

The third embodiment differs from the first embodiment in that an air damper 7 is attached to a portion of the gas nozzle 6 . This difference is described in detail below. In the third embodiment, at the bottom end (lower end) of the air damper 7 is formed a radially inwardly curved edge portion 7 a that can be seated on the flange portion 6 c of the gas nozzle 6 . In addition, there is a nut 61 corresponding to a pressing member, and this nut 61 is screwed onto the external thread on the outer peripheral surface of the cylindrical portion 6 d of the gas nozzle 6 from the axial front (upper side). Then, the bent edge portion 7 a is sandwiched between the flange portion 6 c and the nut 61 to attach the bottom end portion of the air damper 7 to the gas nozzle 6 .

In this way, in the third embodiment, the bottom end of the air damper 7 is also mounted on the gas nozzle 6. Therefore, as in the first embodiment, the central axis of the air damper 7 can be aligned with the nozzle hole 6a. The axes of the holes are consistent, so that the mixture with uniform air-fuel ratio can be sprayed from the multiple flame ports 3a on the outer periphery of the burner head 3 .

Furthermore, in the third embodiment, various kinds of air dampers 7 with different lengths are prepared, and an air damper 7 of an appropriate length corresponding to the type of gas is selected and installed on the gas nozzle 6, so that the primary air sucked into the mixing tube 5 The amount of air can be limited to an appropriate amount for the type of gas.

As mentioned above, although embodiment of this invention was described referring drawings, this invention is not limited to this. For example, in the second embodiment, the air damper 7 may not be composed of two components, but prepare various air dampers 7 with different lengths as in the third embodiment, and select an air damper 7 of an appropriate length corresponding to the gas type. The damper 7 is installed on the gas nozzle 6, or, in the third embodiment, the air damper 7 can also be composed of two components as in the second embodiment, and the length of the air damper 7 can be changed corresponding to the type of gas. . Furthermore, in the third embodiment, the nut 61 screwed to the outer periphery of the gas nozzle 6 from the axial front is used as the pressing member, but the pressing member may be constituted by a spring washer or the like with internal threads formed on the inner periphery. In addition, in the above-mentioned embodiment, the venturi portion is not formed in the mixing tube 5, and the stove burner 2 that sucks primary air from the inlet portion 5a of the mixing tube 5 by the radial Venturi effect is applied to the present invention, but Stove burners incorporating a mixing tube having a venturi section are also suitable for use in the present invention.

Claims (3)

1. a kind of furnace combustor, possesses：Burner head, has multiple flame holes in peripheral part；Mixing tube, is connected to burner Head；And gas nozzle, the nozzle bore of combustion gas is sprayed with the inlet portion towards mixing tube, the furnace combustor possesses tubular Air damper, be used to limit the primary air amount for being sucked into mixing tube, it is characterised in that：

Be arranged on gas nozzle for bottom in its center axis mode consistent with the hole axle of nozzle bore by air damper, and one Secondary air is sucked into mixing tube by the axial gap generated between the front end of air damper and the inlet portion of mixing tube, Air damper is located at axially front relative to gas nozzle；

The gap value between the front end of air damper and the inlet portion of mixing tube can be changed on the direction of principal axis of air damper, To adjust the traffic attraction of primary air.

2. furnace combustor as claimed in claim 1, it is characterised in that

The bottom of the air damper is screwed on the periphery of the gas nozzle.

3. furnace combustor as claimed in claim 1, it is characterised in that

The air damper bottom formed towards radially inner side bending bending edge, and will bending edge be clamped into for Be spirally connected the gas nozzle nozzle retaining feature and be formed between the flange part of gas nozzle periphery.