JP2006029720A - Burner for gas cooking stove - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a burner for a gas cooking stove capable of adopting a manufacturing method allowing mass production even when forming a sideways opening communicated with a vertical opening in a burner body. <P>SOLUTION: The burner body 2 which is an integrated object of a burner base 3 and a mixing tube 5 is formed by integrally joining upper and lower housings 2a and 2b. Faying surfaces of the upper and lower housings 2a and 2b are formed along a lower horizontal line 10 extending along a vertical center of the mixing tube 5 to the vertical opening 8 and crossing a base end part of the burner base 3, a slanted line 11 continuous with the lower horizontal line 10, crossing the vertical opening 8 in an oblique upward direction, and forming the sideways opening 9 in the burner base 3, and an upper horizontal line 12 continuous with an upper end of the slanted line 11 and extending to a tip of the burner base 3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas stove burner.

  Conventionally, as shown in FIG. 9, the gas stove burner 1 has an annular burner cap in which a plurality of flame holes 6 are arranged on the outer edge end surface on a burner base 3 provided with an annular mixing chamber 4. 7, a disc-shaped cover 17 that covers the upper side of the burner cap 7 is attached to the burner cap 7, and a mixing tube that sucks primary air from the mixing chamber 4 as the gas is supplied 5 is continuously provided in a substantially horizontal direction, gas is mixed with primary air in the mixing tube 5 and the mixing chamber 4 to generate an air-fuel mixture, and the air-fuel mixture is burned in the flame hole 6 communicated with the mixing chamber 4. A flame is generated. In addition, in the combustion of the flame in the flame hole 6, in addition to the primary air, the cover 17 is formed from the air around the flame hole 6 and the upper and lower openings 8 provided at the center of the burner body 2 and the burner cap 7. By using the air supplied to the vicinity of the flame hole 6 through the space between the burner cap 7 and the secondary air as the secondary air, efficient combustion is ensured. In the arrangement of the gas stove burner 1 in the gas cooker, the upper portion of the gas stove burner 1 for burning the flame is passed through the top plate of the gas cooker and is positioned above the top plate. Thus, the gas stove burner 1 is installed inside the gas cooker.

  In the burner body 2 composed of the mixing tube 5 and the burner base 3 in such a gas stove burner 1, the upper and lower housings 2a and 2b manufactured separately by die casting are joined for mass production. It is generally formed by a manufacturing method such as integration. Here, since the burner body 2 has the mixing pipe 5 extending substantially in the horizontal direction, the upper half of the mixing pipe 5 is formed in the upper housing 2a and the lower half of the mixing pipe 5 is formed in the lower housing 2b. is doing. The mixing chamber 4 is specifically formed of an outer cylindrical wall 20, an inner cylindrical wall 19, and a bottom wall 21 that connects the lower ends of these walls 19, 20, but the upper housing 2a has an outer cylindrical wall 20 formed therein. The lower housing 2b is formed with an inner cylindrical wall 19 and a bottom wall 21. When the upper housing 2a and the lower housing 2b are joined together in the vertical direction, they are formed at the lower end of the outer cylindrical wall 20. The bottom wall 21 is joined (for example, refer patent document 1).

  By the way, in the gas cooker equipped with the gas stove burner 1, in recent years, the thickness has been reduced, or the top plate and the gas stove burner 1 have been designed to prevent intrusion of the broth into the gas cooker. A water stop treatment is performed between the two. Here, for example, in a gas cooker with a reduced thickness, there may be a case where there is not enough space between the bottom plate of the gas cooker and the gas stove burner 1. There is a risk that secondary air from the upper and lower openings 8 of the gas stove burner 1 cannot be sufficiently supplied to the flame hole 6 and efficient flame combustion cannot be ensured. For example, in a gas cooker that has been subjected to a water stop treatment between the top plate and the burner body 2, the air in the gas cooker heated by the combustion of the flame becomes warm air near the lower surface of the top plate. There was a risk that the gas cooker would be heated by boiling.

  In order to deal with these problems, the present applicant, after extensive research, provided a lateral opening that opens laterally at a portion near the lower surface of the top plate of the upper and lower opening 8 of the gas stove burner 1. The warm air trapped near the lower surface of the plate is introduced into the upper and lower openings 8 from the side openings, and the secondary air is preferentially used as the secondary air from the upper and lower openings 8 by using the rising force of the warm air itself. It was recalled that a reliable supply of air to the flame hole 6 and an efficient cooling of the gas cooker were possible at the same time. The side opening has a diameter while maintaining the airtightness of the mixing chamber 4 because of the structure of the gas stove burner 1 that the annular mixing chamber 4 is positioned around the upper and lower openings 8. It must be formed so as to penetrate the inner and outer directions and communicate with the upper and lower openings 8.

However, when the burner body 2 having the side openings is formed by joining and integrating the upper and lower housings 2a and 2b, the shape of the upper and lower housings 2a and 2b is complicated in order to form the side openings. Therefore, it is difficult to manufacture the upper and lower housings 2a and 2b by die casting due to manufacturing restrictions such as die cutting from the manufacturing mold. However, the present situation is that mass production of the gas stove burner 1 having such a side opening has not been achieved.
JP 2003-214606 A

  The present invention has been invented in view of the above-described conventional problems, and is a gas stove that can adopt a mass-produced manufacturing method while forming a side opening communicating with the upper and lower openings in the burner body. It is an object to provide a burner for use.

  In order to solve the above-described problem, a gas stove burner according to claim 1 of the present invention is formed with an annular mixing chamber 4 in the burner base 3 and the tip of the mixing tube 5 whose base end is open is mixed with the mixing chamber 4. An annular shape in which a flame hole 6 communicating with the mixing chamber 4 on the burner base 3 is arranged in a row on the outer edge end surface so as to communicate with the lower end of the burner base 3 from a substantially horizontal direction. The burner cap 7 is placed, and the burner base 3 and the burner cap 7 are provided with an upper and lower opening 8 that opens up and down at the center in the radial direction. A gas stove burner 1 having a side opening 9 that communicates, and a burner body 2 that is an integrated body of a burner base 3 and a mixing tube 5 is formed by joining and integrating upper and lower housings 2a and 2b. The mixing surfaces of the upper and lower housings 2a, 2b The lower horizontal line 10 extending across the base end of the burner base 3 to the upper and lower opening 8 along the center of the vertical direction, and the upper and lower opening 8 continuous across the lower horizontal line 10 and obliquely upward. It is characterized in that it is formed along an inclined line 11 for forming a side opening 9 in the burner base 3 and an upper horizontal line 12 extending continuously from the upper end of the inclined line 11 to the tip end portion of the burner base 3. .

  According to this, the lower horizontal line 10 extending from the joint surface of the upper and lower housings 2a and 2b to the upper and lower opening 8 across the base end of the burner base 3 along the vertical center of the mixing tube 5 and the lower horizontal line 10, an inclined line 11 that forms a side opening 9 in the burner base 3 across the upper and lower openings 8 obliquely upward, and a tip of the burner base 3 that is continuous with the upper end of the inclined line 11. In the burner base 3 of the burner body 2 formed by joining and integrating the upper and lower housings 2a and 2b, a side opening 9 communicating with the upper and lower openings 8 is formed. In other words, the gas stove burner 1 in which the side openings 9 are formed can be manufactured by the die-cast upper and lower housings 2a, 2b, and the gas stove in which the side openings 9 are formed. It is possible to achieve mass production of the burner 1.

  Further, the gas stove burner according to claim 2 is inclined in a substantially opposite direction to the inclined line 11 at a position adjacent to the inclined line 11 in the joint surface of the upper housing 2a and the lower housing 2b. The engaging surfaces 13 and 14 are formed, and the engaging surfaces 13 and 14 facing each other when the upper housing 2a and the lower housing 2b are joined are brought into surface contact with each other to engage with each other. According to this, if the joint surface of the upper and lower housings 2a, 2b includes the inclined line 11, the upper housing 2a and the lower housing 2b may be displaced in the inclined direction along the joint surface of the inclined line 11, but the upper housing 2a Further, engaging surfaces 13 and 14 that are inclined in a substantially opposite direction to the inclined line 11 are formed at positions adjacent to the inclined line 11 on the bonding surface of the lower housing 2b, and the upper housing 2a and the lower housing 2b are bonded to each other. By engaging the opposing engaging surfaces 13 and 14 in surface contact with each other, the joined upper housing 2a and lower housing 2b can be brought close to each other, and the upper housing 2a and lower housing 2b Positioning can be ensured without any deviation in the tilt direction. Therefore, the upper and lower housings 2a and 2b can be joined without a gap, and the required airtightness of the mixing chamber 4 can be secured.

  The present invention makes it possible to manufacture a gas stove burner provided with a side opening communicating with the upper and lower openings by means of a die-cast upper and lower housing, and mass production of the gas stove burner having a side opening is realized. It has the effect of being able to plan.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings.

  As shown in FIGS. 2 and 3, the gas cooker 15 of this example has a large, medium, and small gas stove 16 (a large gas stove 16a, a medium gas stove 16b, and a small gas stove). 16c) is provided, and each gas stove burner 1 constituting each gas stove 16a-16c has a flame generating section for burning an air-fuel mixture of gas and air to generate an annular flame. The gas cooker 15 is mounted on the top plate 15a. Here, the gas stove burners 1 constituting the large, medium, and small gas stoves 16a to 16c have the same basic structure although the diameters of the flame generating portions are different, and will be described in detail below. .

  As shown in FIGS. 3 and 4, the gas stove burner 1 includes a burner body 2 in which a horizontal tubular mixing tube 5 and a burner base 3 having a mixing chamber 4 to which the mixing tube 5 is connected, and a burner. A burner cap 7 having a flame hole 6 placed on the base 3 and serving as a flame generating portion, and a substantially horizontal disk-like shape attached to the burner cap 7 so as to cover substantially the entire upper surface of the burner cap 7 And a cover 17. In the gas stove burner 1 of this example, the mixing tube 5 and the burner base 3 are constituted by a burner body 2 formed by integrating them.

  The mixing tube 5 is a horizontal tubular portion of the burner body 2 whose base end is open and its tip communicates with the base end of the lower portion of the mixing chamber 4, and the burner base 3 is vertically opened to open up and down. This is a portion of the burner body 2 in which an annular mixing chamber 4 is provided so that 8 is formed in the center. A gas nozzle 18 for supplying gas is arranged so as to face the opening of the mixing pipe 5. When gas is supplied from the gas nozzle 18, primary air is introduced from the opening of the mixing pipe 5 by the inflow of gas into the mixing pipe 5. The air is sucked into the mixing tube 5, and the gas and the primary air are mixed in the mixing tube 5 and the mixing chamber 4 to generate an air-fuel mixture. Specifically, the mixing chamber 4 includes an inner cylinder wall 19 that forms the upper and lower openings 8 in the cylinder, and an outer cylinder wall that is disposed so as to overlap the radial direction of the inner cylinder wall 19 at a predetermined interval. 20 and an annular space portion that opens upward and is surrounded by a bottom wall 21 that connects lower ends of the inner cylinder wall 19 and the outer cylinder wall 20. That is, the mixing chamber 4 is opened upward on the upper surface of the burner base 3, and the burner cap 7 is placed on the upper opening edge of the mixing chamber 4 formed by the upper end surfaces of the inner cylinder wall 19 and the outer cylinder wall 20. An annular planar mounting surface 22 is provided. A concave step portion 23 is formed on the outer edge portion of the mounting surface 22 formed by the upper end surface of the outer cylindrical wall 20. In addition, a flange portion 24 protruding in the radially outward direction is integrally formed at the upper portion of the outer cylindrical wall 20, and an outer edge step portion 25 is formed on the outer edge portion of the flange portion 24 so as to be lowered by one step. . A packing 26 is disposed on the outer edge step portion 25.

  The burner base 3 is mounted on and fixed to the bottom plate of the gas cooker 15 and is installed in the gas cooker 15. At this time, the upper portion of the burner base 3 protrudes from the top plate 15 a of the gas cooker 15. Arranged in this way. Here, the top plate 15a of the gas cooker 15 is formed of a material such as glass, and the top plate 15a has a through-hole 27 through which the upper portion of the burner base 3 is inserted. The burner base 3 inserted into the through hole 27 is fixed to the top plate 15 a via a burner ring 28 attached to the edge of the through hole 27. Specifically, the burner ring 28 and the top plate 15 a are fixed in a watertight structure via a packing 29 provided on the burner ring 28, and the burner base 3 and the burner ring 28 are watertight via a packing 26 provided on the burner base 3. The burner base 3 and the top plate 15a are fixed in a watertight structure. Further, the virtues 30 are placed on the top plate 15 a of the gas cooker 15 so as to surround the through hole 27. The five virtues 30 include an annular leg 31 placed on the top plate 15a, and a plurality of claw parts 32 projecting upward and centrally from any location of the leg 31 to place a cooking tool such as a pan. The locking portion provided on the leg portion 31 is locked to the locked portion of the burner ring 28 attached to the top plate 15a, for example, to prevent rotation in the circumferential direction. It is placed on top.

  As shown in FIG. 4, the burner cap 7 is an annular block body having an upper and lower opening 8 that opens up and down at the center, and a plurality of flame holes 6 are arranged in the outer edge end face. Specifically, the burner cap 7 of this example is made of aluminum die-cast, and a connecting cylinder 34 that forms the upper and lower openings 8 is suspended from the center of the burner cap 7, and a flame is radially formed on the lower surface of the burner cap 7. A large number of hole grooves 35 are formed in the circumferential direction, and a plurality of radial secondary air supply grooves 36 are formed in the circumferential direction on the upper surface of the burner cap 7. The flame hole groove 35 is an air-fuel mixture passage for bringing the air-fuel mixture from the mixing chamber 4 of the burner base 3 to the flame hole 6, and the secondary air supply groove 36 is formed in the vicinity of the flame hole 6 from the upper and lower openings 8. It is an air flow path for supplying secondary air. Here, each of the flame hole groove 35 and the secondary air supply groove 36 opens to the outer edge end face of the burner cap 7, but the opening to the outer edge end face of the flame hole groove 35 constitutes the flame hole 6. . Moreover, the opening to the outer edge end surface of the secondary air supply groove 36 is provided between the adjacent flame holes 6. The burner cap 7 is placed on the burner base 3 by fitting the connecting cylinder 34 of the burner cap 7 inside the inner cylinder wall 19 of the burner base 3 so that the lower surface of the burner cap 7 is placed on the mounting surface of the burner base 3. This is done by placing it on 22.

  In the state where the burner cap 7 is placed on the burner base 3, as shown in FIG. 3, although the upper opening of the mixing chamber 4 of the burner base 3 is closed by the burner cap 7, the flame hole 6 forms the flame hole groove 35. The upper and lower openings 8 extending to the burner base 3 and the burner cap 7 are formed. Strictly speaking, the flame hole groove 35 is a concave groove that opens downward, and when the burner cap 7 is placed on the placement surface 22 of the burner base 3, the flame hole groove 35 faces the outer edge of the flame hole groove 35. In the vicinity of the opening, the lower opening of the flame hole groove 35 is substantially closed by the mounting surface 22 of the burner base 3 to form a hole, and this hole-shaped portion constitutes the flame hole 6. Thus, the gas mixture of the gas and primary air is supplied to each flame hole 6 from the mixing chamber 4 of the burner base 3 through the flame hole groove 35, and the mixture gas ejected from each flame hole 6 is supplied to the flame hole 6. By igniting an ignition flame generated in an ignition chamber 37 to be described later, combustion can be performed so that the flame is discharged outward from all the flame holes 6. Here, in the combustion of the air-fuel mixture in the flame hole 6, the amount of primary air that is insufficient is efficiently received by receiving the supply of secondary air. As the secondary air, not only the air around the flame hole 6, but also the air inside the gas cooker 15 that has passed through the upper part of the burner cap 7 from the upper and lower openings 8 to reach the vicinity of the flame hole 6 is used. .

  Further, when the burner cap 7 is placed on the burner base 3, a concave step portion 23 is provided between the lower end of the outer edge end surface of the burner cap 7 and the outer edge portion of the placement surface 22 of the burner base 3. A minute gap extending in the circumferential direction is formed, that is, the entire flame hole 6 of the burner cap 7 is communicated in the circumferential direction by the minute gap. This minute gap communicates not only with the flame hole 6 but also with an ignition chamber 37 to be described later. The ignition flame generated in the ignition chamber 37 is spread to the air-fuel mixture of each flame hole 6 (fired). Each flame hole 6 constitutes an auxiliary flame channel 38 for generating a flame. Here, a small chamber-like space 39 is formed between the adjacent flame hole grooves 35 on the lower surface of the burner cap 7, and the space 39 communicates with the auxiliary flame channel 38. Thus, the lift prevention effect and the fire transfer effect of the flame burning in the flame hole 6 are improved. The connecting cylinder 34 of the burner cap 7 is provided with a notch 34a in a part thereof, and a positioning projection 19a projecting inwardly from the inner peripheral surface of the inner cylinder wall 19 of the burner base 3 is provided in the notch 34a. By inserting the burner cap 7, the burner cap 7 is placed on the burner base 3 while being positioned in the circumferential direction. Specifically, the flame hole 6 of the burner cap 7 is provided at a portion of the outer edge of the burner cap 7 excluding a portion corresponding to the claw portion 32 of the virtues 30 and a portion corresponding to the claw portion 32 of the virtues 30. The burner cap 7 is formed with an ignition chamber 37 that generates an ignition flame. By positioning the burner cap 7 on the burner base 3 after positioning in the circumferential direction, the tip of the ignition plug 33 provided on the burner base 3 is surely positioned in the ignition chamber 37 of the burner cap 7 and the ignition chamber 37 Assures reliable ignition flame generation at the same time and allows the flame hole 6 of the burner cap 7 to be reliably disposed in a portion not corresponding to the claw portion 32 of the virtues 30, that is, the flame burned in the flame hole 6. The gas stove burner 1 can be used only for heating cooking utensils such as pots without being interrupted by the claw portions 32 of the five virtues 30, thereby improving the thermal efficiency of the gas stove burner 1. In the gas cooker 15 of this example, as shown in FIG. 2, a pan bottom temperature sensor 50 for detecting the pan bottom temperature and performing various controls in the medium-sized gas stove 16b is attached. Needless to say, it may be attached to the large and small gas stoves 16a and 16c.

  As described above, the gas cooker 15 of the present example is provided with a sealing structure between the burner base 3 and the top plate 15a so as to be waterproof. As described in the background art section, the gas cooker 15 The warm air inside has a structure that tends to be trapped near the lower surface of the top plate 15a. However, in the gas stove burner 1 of this example, the upper and lower openings 8 of the gas stove burner 1 communicate with the upper and lower openings 8 in the vicinity of the lower surface of the top plate 15a and open sideways. A side opening 9 is formed, and warm air trapped in the vicinity of the lower surface of the top plate 15a is introduced from the side opening 9 into the upper and lower openings 8, and the warming air itself is also used to give priority to the upper and lower openings 8. By using it as secondary air, it is possible to reliably supply the secondary air to the flame hole 6 even in the thin gas cooker 15 and to efficiently cool the gas cooker 15. It has the feature. Further, in the gas stove burner 1 having the side opening 9 described above, the burner body 2 which is an integral part of the burner base 3 and the mixing tube 5 is integrated with the upper and lower housings 2a and 2b. In other words, the burner body 2 can be manufactured by the die-cast upper and lower housings 2a and 2b, and the mass production of the gas stove burner 1 having the side openings 9 that could not be realized in the past was attempted. It has a special feature. In the following, in the burner base 3, the direction on the side where the mixing tube 5 is connected to the mixing chamber 4 with the upper and lower openings 8 as the center is referred to as the base end direction, and the side where the mixing tube 5 is connected to the mixing chamber 4. The direction on the opposite side is referred to as the tip direction and will be described.

  As shown in FIGS. 1, 5, and 6, the lower housing 2 b constituting the burner body 2 integrally forms the lower half of the mixing tube 5, the inner cylinder wall 19 and the bottom wall 21 constituting the mixing chamber 4. . In the inner cylinder wall 19 of the present example, the inner cylinder wall 19 is cut away obliquely upward from the center of the lower end of the inner cylinder wall 19 toward the distal end. 40 is provided. That is, according to the inner cylinder cutout portion 40, the lower end of the front half of the inner cylinder wall 19 is formed in an inclined shape that is positioned higher at the front end side. The bottom wall 21 continues from the lower end of the inner cylindrical wall 19 in the radially outward direction so as to form the mixing chamber 4. The lower end of the front half of the inner cylindrical wall 19 in this example is formed by the inner cylindrical notch 40. Since the bottom wall 21 of the present example is formed in an inclined shape, a lower horizontal portion 41 extending from a horizontal lower end is formed in the base end half of the inner cylindrical wall 19, and the inner cylindrical wall 19 In the front half, an inclined portion 42 is formed continuously from the inclined lower end. That is, the inclined portion 42 is a plate-like portion bent from the distal end of the lower horizontal portion 41 in the distal direction and obliquely upward such that the upper surface thereof faces the base end direction of the burner base 3 and obliquely upward. . Further, the bottom wall 21 of the present example is provided with an upper horizontal portion 43 that extends horizontally from the upper end of the inclined portion 42 in the distal direction. In the lower housing 2b of this example, a mounting edge 44 having an upper surface at the upper end level of the lower half of the mixing tube 5 is integrally formed. Further, hanging wall portions 45 connected to the mounting edge portion 44 are integrally formed from both end portions of the inclined portion 42 of the bottom wall 21 in the width direction of the burner base 3 orthogonal to the front end-base end direction in plan view. Yes. On the surface in the radially outward direction of the hanging wall portion 45, an engaging surface 14 is formed so as to form a substantially isosceles triangular oblique side together with the inclined portion 42 of the bottom wall 21 in a side view. That is, the engagement surface 14 is a planar portion facing the tip end direction of the burner base 3 and obliquely upward.

  On the other hand, the upper housing 2 a that constitutes the burner body 2 together with the lower housing 2 b integrally forms the upper half of the mixing tube 5 and the outer cylinder wall 20 that constitutes the mixing chamber 4. In addition, the horizontal plate-like flange part 24 which protrudes toward a radial outward direction is integrally formed in the upper part of the outer cylinder wall 20 of the upper housing 2a as mentioned above. Further, in the outer cylinder wall 20 of the present example, the outer cylinder is obliquely upward toward the tip from the lower end of the outer cylinder wall 20 to the connection portion of the flange portion 24 to the outer cylinder wall 20 at the tip half. An outer cylinder cutout 46 is provided to cut out the wall 20. That is, according to the outer cylinder notch portion 46, the lower end of the front half of the outer cylinder wall 20 is formed in an inclined shape that is located at a higher position toward the front end side, and the flange portion 24 extends from the upper end edge of the outer cylinder notch portion 46. The lower surface of this is continuous in a radially outward direction and horizontally. Further, at both ends in the radially outer direction of the burner base 3 at the tip half of the outer cylinder wall 20, a substantially isosceles triangle shape is seen in side view between the inclined lower end surface of the tip half of the outer cylinder wall 20. An engagement surface 13 is formed so as to form a hypotenuse of an approximately isosceles triangle shape with this lower end surface so as to form a space. That is, the engaging surface 13 is a planar portion facing the base end direction of the burner base 3 and obliquely downward. In this example, the inclined line 11 on the joint surfaces of the upper and lower housings 2a and 2b has an inclination of approximately 45 ° so as to rise in the distal direction, and the engagement surfaces 13 and 14 correspond to the proximal ends respectively. The inclination is approximately 45 ° so as to rise in the direction. Further, the upper housing 2a of this example is integrally formed with a mounting edge 47 having a lower surface at the lower end level of the upper half of the mixing tube 5. The mounting edge 47 is formed at a position facing the mounting edge 44 of the lower housing 2b.

  In order to join and integrate the upper and lower housings 2a and 2b so as to form the burner body 2, the upper end surface of the mixing tube 5 of the lower housing 2b is brought into contact with the lower end surface of the mixing tube 5 of the upper housing 2a. The inner cylindrical wall 19 of the lower housing 2b is inserted inside the outer cylindrical wall 20, and the engaging surfaces 13, 14 of the upper and lower housings 2a, 2b are brought into contact with each other as shown in FIG. The bottom wall 21 of the lower housing 2b is brought into contact with the lower end of the outer cylindrical wall 20 and the lower surface of the flange portion 24, and the mounting edges 44, 47 of the upper and lower housings 2a, 2b are brought into contact with each other. It is done by fastening with. Here, in detail, when the bottom wall 21 of the lower housing 2b is in contact with the lower end of the outer cylindrical wall 20 of the upper housing 2a and the lower surface of the flange portion 24, the base half of the outer cylindrical wall 20 is substantially omitted. The upper surface of the lower horizontal portion 41 of the bottom wall 21 of the lower housing 2b is brought into contact with the horizontal lower end, and the inclined portion 42 of the bottom wall 21 of the lower housing 2b is attached to the inclined lower end of the tip half of the outer cylinder wall 20. The upper surface of the upper horizontal portion 43 of the bottom wall 21 of the lower housing 2b is brought into contact with the substantially horizontal lower surface of the flange portion 24. In other words, the joint surfaces of the upper and lower housings 2a and 2b are lower horizontal lines extending across the base end of the burner base 3 to the upper and lower openings 8 along the vertical center of the mixing tube 5 as shown in FIG. 10 (the contact surface between the upper end surface of the mixing tube 5 of the lower housing 2b and the lower end surface of the mixing tube 5 of the upper housing 2a, and the substantially horizontal lower end and the lower portion of the base half of the outer cylindrical wall 20 of the upper housing 2a The bottom wall 21 of the housing 2b is in contact with the upper surface of the lower horizontal portion 41) and the lower horizontal line 10 and the upper and lower openings 8 are crossed diagonally upward and laterally to the burner base 3. An inclined line 11 (which is formed by a contact surface between the inclined lower end of the tip half of the outer cylindrical wall 20 of the upper housing 2a and the upper surface of the inclined portion 42 of the bottom wall 21 of the lower housing 2b so as to form the opening 9. The burner bar continuously to the upper end of the inclined line 11. 3 to the upper horizontal line 12 (consisting of a substantially horizontal lower surface of the flange portion 24 of the upper housing 2a and a contact surface between the upper surface of the upper horizontal portion 43 of the bottom wall 21 of the lower housing 2b) extending to the distal end portion of the upper housing 2a. It is formed along. According to this, the lower end of the inner cylinder wall 19 and the outer cylinder wall 20 can be connected to each other without a gap at the bottom wall 21, and the annular mixing chamber 4 having airtightness is formed. Specifically, the mixing chamber 4 is connected to the inner cylinder cutout portion 40 of the inner cylinder wall 19 and the outer cylinder cutout portion 46 of the outer cylinder wall 20 at the inclined portion 42 of the bottom wall 21 at the tip half. The depth from the upper opening is formed so that the tip becomes shallower. That is, at the tip half of the burner base 3, a side opening 9 that opens in the tip direction while communicating with the upper and lower openings 8 is provided so as to cut out the lower part of the tip half of the mixing chamber 4. . Specifically, the side opening 9 is formed so as to open a portion of the lower region from the lower surface of the flange portion 24 in the upper and lower openings 8 toward the tip of the burner base 3.

  As described above, in the gas stove burner 1 of this example, the burner body 2 having the side openings 9 is formed by joining and integrating the upper and lower housings 2a and 2b. That is, the gas stove burner 1 in which the side opening 9 is formed can be manufactured by the upper and lower housings 2a, 2b made of die casting, and mass production of the gas stove burner 1 in which the side opening 9 is formed is achieved. It is made to get. Further, the side openings 9 are formed so as to communicate with the upper and lower openings 8 in the lower region from the lower surface of the flange portion 24 of the burner body 2. Here, since the flange portion 24 of the burner body 2 is a portion that is inserted into a through hole 27 that is drilled in the top plate 15 a of the gas cooker 15, the side opening 9 provided up to the lower surface of the flange portion 24 has a ceiling. It is open near the lower surface of the plate 15a. Thus, warm air trapped in the vicinity of the lower surface of the top plate 15a is introduced into the upper and lower openings 8 from the side openings 9, and is also used as secondary air preferentially from the upper and lower openings 8 using the rising force of the warm air itself. In other words, even in the thin gas cooker 15, the secondary air can be reliably supplied to the flame hole 6 and the gas cooker 15 can be efficiently cooled. -ing

  Further, in the burner body 2 of the gas stove burner 1 of this example, the upper and lower housings 2a and 2b are positioned because the inclined surfaces 11 are provided on the joint surfaces of the upper and lower housings 2a and 2b as described above. When they are combined, the upper housing 2a and the lower housing 2b may be displaced in the inclination direction of the inclination line 11. However, in the burner body 2 of this example, as shown in FIG. 8, the upper housing 2a and the lower housing 2b are engaged with each other so as to form a hypotenuse of a substantially isosceles triangle shape together with the inclined line 11 in a side view. Surfaces 13 and 14 are formed, and when the upper and lower housings 2a and 2b are joined, the engaging surfaces 13 and 14 are brought into surface contact with each other, so that the upper and lower housings 2a and 2b joined by the fixture 48 are engaged. Such a fastening force can be applied between the engaging surfaces 13 and 14 engaged in the surface contact state, and the upper housing 2a and the lower housing 2b joined can be brought close to each other. Positioning that eliminates the shift in the tilt direction with respect to 2b is ensured. Accordingly, the upper and lower housings 2a and 2b can be joined without a gap, and the required airtightness of the mixing chamber 4 is ensured.

It is a sectional side view of the burner main body of the burner for gas stoves of the example of embodiment of this invention. It is a top view of a gas cooker same as the above. It is a sectional side view of the principal part of a gas cooker same as the above. It is a disassembled perspective view of the gas stove burner same as the above. It is the disassembled perspective view seen from the downward direction of the burner main body same as the above. It is the disassembled perspective view seen from the upper direction of the burner main body same as the above. It is a bottom view of a burner main body same as the above. It is a disassembled perspective view of the principal part of a burner main body same as the above. It is a sectional side view of the burner main body which shows the example of background art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gas stove burner 2 Burner body 2a Upper housing 2b Lower housing 3 Burner base 4 Mixing chamber 5 Mixing pipe 6 Flame hole 7 Burner cap 8 Vertical opening 9 Side opening 10 Lower horizontal line 11 Inclined line 12 Upper horizontal line 13 Engagement Surface 14 Engagement surface

Claims (2)

  An annular mixing chamber is formed in the burner base, and the top end of the mixing tube whose base end is open is connected to the base end of the burner base from a substantially horizontal direction so as to communicate with the lower portion of the mixing chamber. An annular burner cap in which a number of flame holes communicating with the mixing chamber are arranged on the outer edge end surface is placed on the burner base, and an upper and lower opening that opens up and down is provided at the radial center of the burner cap. A gas stove burner having a lateral opening that opens outward in the tip direction and communicates with the upper and lower openings. The burner body, which is an integral part of the burner base and the mixing tube, is joined to the upper and lower housings. The upper and lower housing joint surfaces are formed in one piece, and the lower horizontal line extends across the base end of the burner base to the upper and lower openings along the vertical center of the mixing tube. Open up and down For example, it is formed along an inclined line that forms a lateral opening in the burner base across the upper side and an upper horizontal line that extends continuously from the upper end of the inclined line to the tip of the burner base. Gas burner burner.   Engagement surfaces that incline in an approximately opposite direction with respect to the inclined line are formed at positions adjacent to the inclined line on the joint surface of the upper housing and the lower housing, respectively, and are opposed when the upper housing and the lower housing are joined. The gas stove burner according to claim 1, wherein the mating surfaces are brought into contact with each other and engaged with each other.

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