KR0182671B1 - Burner - Google Patents

Abstract

An object of the present invention is to provide a go-low burner which can prevent intrusion into the auxiliary chamber even when exhaust gas flows back from the central air passage during ignition, and facilitates ignition operation. Burner body (2) having an annular, the annular burner head (3) which is detachably mounted on the annular head portion 21 and forms an annular flame hole row (11) on the outer circumference, and the center formed in the center An air passage (4), a heat-closing cylinder (41) attached coaxially to the upper side of the central air passage (4), and a pot bottom temperature sensor (5) installed in the center of the central air passage (4); And a communication port 20 which is provided in a part of the annular flame hole row 11 and communicates with the lower part of the annular head portion 21, and which faces the communication port 20, and the ignition electrode 14 or the thermocouple 13 In the go-ro burner (1) having an auxiliary chamber (12) mounted thereon, the lower side of the central air passage (4) and Between the auxiliary chamber 12, a shielding member 7 is provided which prevents the exhaust gas flowing back from the central air passage 4 from entering the auxiliary chamber 12.

Description

Goro burner

1 is a cross-sectional view of the goro burner.

2 is an enlarged view of the main part of FIG.

3 is a perspective view of the burner body and the burner head.

4 is a perspective view of a flame arrestor and a shield member.

* Explanation of symbols for main parts of the drawings

1: goro burner 2: burner body

3: burner head 4: central air passage

5: pot bottom temperature sensor 6: flame prevention plate

7 shielding member 11 ring flame hole heat

12: auxiliary room 13: thermocouple (fire sensor)

14: ignition electrode (ignition device) 20: communication port

21: burner body annular head 27: inner circumference wall

The present invention relates to the improvement of the ignition property during ignition in a gourd burner having a pot bottom temperature sensor.

The go-ro burner provided with a pot bottom temperature sensor is detachably mounted to a burner body having an annular head, and forms a row of flame holes in an outer circumference. The central part of the go-ro burner is a cylindrical central air passage, and a pot bottom temperature sensor composed of a support and a thermosensitive cap elastically supported by the support is installed at the shaft center 6 of the air passage. The upper side of the burner head is equipped with a heat shield to prevent the flame from the annular flame hole heats the heat cap.

In addition, a part of the annular flame hole row is formed with an auxiliary flame hole in which the flame hole row is arranged on the inner circumferential side in order to provide a ignition electrode of the ignition device, a thermocouple as an ignition (ignition) sensor and the like. An auxiliary chamber opened outward is provided outside the auxiliary flame hole, and the ignition electrode and a thermocouple are attached to the auxiliary chamber. Therefore, an annular protrusion formed with a slit in the form of a comb teeth protrudes from the outer peripheral portion of the burner head lower side, and the annular protrusion has a portion corresponding to the auxiliary chamber formed into the inner peripheral side, and the outer portion thereof is a concave portion. The recess forms a space of the auxiliary chamber.

On the upper side of the annular head of the burner body, an annular installation surface is formed in which the lower surface of the annular protrusion abuts. A ring flame hole row is formed. The annular head of the burner body is provided with a communication port for forming the ignition electrode of the ignition electrode in the auxiliary chamber and inserting and mounting the thermocouple of the thermocouple from the lower side.

In the go-ro burner equipped with the pot bottom temperature sensor, combustion exhaust from the annular flame hole heat immediately after ignition flows backward through the central air passage through the gap between the pot bottom and the upper end of the heat shield, and enters into the auxiliary room while depriving oxygen. It may generate a state. This is a characteristic of ignition caused by the weak airflow in the central air passage immediately after ignition. When the oxygen deficiency causes the flame of the auxiliary flame hole to lift, the heating of the thermocouple as a misfire sensor is not smooth, and the safety valve which maintains the ON state of the valve by the electromotive force of the thermocouple closes, making it impossible to maintain ignition. have.

SUMMARY OF THE INVENTION An object of the present invention is to provide a gourd burner which can prevent the intrusion into the auxiliary chamber even when exhaust or the like flows back from the central air passage during ignition, and the ignition operation can be smoothed.

It is an object of the invention as claimed in claims 2 and 3 to provide a gourd burner capable of preventing a reverse flow of exhaust from the central air passage into the auxiliary chamber with a simple configuration.

The present invention includes a burner body having an annular head, an annular burner head detachably mounted on the annular head and forming an annular flame hole row on an outer circumference thereof, and formed in the center of the annular head and the annular burner head. A central air passage, a heat-closing passage attached coaxially to the upper side of the central air passage, a pot bottom temperature sensor installed at the center of the central air passage and the heat-closing passage, and the flame hole row installed at an inner circumferential side. The central air passage in the go-ro burner is provided on the outside of the auxiliary flame hole and having a communication port connected to the lower side of the annular head, and having an auxiliary chamber equipped with an ignition device or a misfire sensor facing the communication hole. To back the central air passage between the gas and the auxiliary chamber to support exhaust of gas into the auxiliary chamber. Characterized in that the closing member is installed.

The go-ro burner according to claim 2 is characterized in that the shield member is a partition plate extending downward from the lower end of the central air passage.

The go-ro burner according to claim 3 is characterized in that the partition plate is made of one sheet metal and has a return plate portion inclined toward the central air passage.

The go-ro burner according to claim 4 is characterized in that the lower end of the partition plate extends below the lower end of the annular head.

The go-ro burner of the present invention prevents the combustion exhaust that flows back along the central air passage immediately after the shielding member enters the auxiliary chamber. For this reason, the flame from the auxiliary flame hole immediately lifts due to the oxygen deficiency immediately after ignition, thereby preventing the heating thermocouple from being generated. As a result, the problem that the safety valve closes immediately after ignition does not occur, and the ignition operation is smooth.

In the configuration described in claims 2 to 4, the combustion exhaust flowing back from the central air passage can be prevented from entering the auxiliary chamber with a simple configuration.

The go-ro burner of this invention is demonstrated based on FIG. 1 thru | or FIG.

The go-ro burner 1 is provided with the burner body 2 which has the annular head part 21 as a sheet metal material, and the forged-shaped annular burner head 3 which detachably attached to the said annular head part 21 was provided. The burner head 3 extends from the upper end of the cylinder portion 3A inserted into the inner circumference of the annular head 21 and from the upper end of the cylinder portion 3A to cover the annular head 21. It consists of an umbrella part 3B.

The inner side of the annular head 21 and the cylinder part 3A is a cylindrical shape, and becomes the central air path 4 for supplying combustion secondary air. The cylindrical heat shield 41 is attached to the upper side of the burner head 3 on the same axis as the central air passage 4 by three legs 42. Between the heat shield 41 and the upper surface of the burner head 3, a part of the air rising in the central air passage 4 is discharged along the upper surface of the burner head 3 as secondary air for combustion. An annular gap 43 is provided. In the center of the central air passage (4), the pot bottom temperature sensor (5) of the pot bottom (A) to be manufactured is installed in a concentric circle.

Pot bottom temperature sensor (5) of the support cylinder 51, the support cylinder 51 of the small diameter inserted into the switch (H) attached to the bracket 50 arranged horizontally below the annular head 21 An intermediate diameter central body 52 attached to the upper end and the thermal cap 54 is attached to the upper end of the central body 52 and elastically supported by the spring 53. The temperature sensor 55 is attached to the thermosensitive cap 54, and the lead wire 56 extends downward through the central body 52 and the support cylinder 51.

By joining the burner body 2 and the burner head 3, an annular flame hole row 11 formed of an annular main flame hole is formed on the outer peripheral side, and a part of the annular flame hole row 11 It is arranged to enter the side to form an auxiliary flame hole, the auxiliary chamber 12 is provided on the outside. The thermocouple 13 (see FIG. 3) as a misfire (ignition) sensor provided toward the auxiliary chamber 12 and the ignition electrode 14 of the ignition device are inserted into a holder H attached to the bracket 50. have. On the upper side of the bracket 50, there is attached a flame prevention plate 6 for partitioning the lower space of the communication port 20 to be described later and the other lower space of the burner body (2). In addition, the auxiliary chamber 12 is installed as described above, and the ignition electrode 14 and the thermocouple 13 are disposed toward the auxiliary chamber 12 so that boiling broth is placed on the ignition electrode 14 and the thermocouple 13. This is to prevent the malfunction from being dropped and attached.

As shown in FIG. 3, the burner body 2 overlaps the upper and lower plates formed by press-forming a metal plate punched into a predetermined shape, and welds or spots the flange portion 2A to the outer periphery of the annular head 21. The inner periphery (2B) of the () is wound and tightened to manufacture. In the present embodiment, the outer peripheral flange portion 2A is the lowermost end of the annular head portion 21.

From a part of the lower part of the annular head part 21, the mixing pipe part 22 is extended toward radial outer periphery, and the front end of the mixing pipe part 22 is a supply port of fuel gas and primary air for combustion.

The annular head 21 has an inner space at the upper portion of the annular head as a passage of the mixer of fuel gas and primary air, and a lower portion of the annular head portion 21 at the cylindrical skirt portion 2S. On the upper side of the annular head portion 21, a plurality of ejection openings 24 are formed in an annular inner ring, and an annular mounting surface 25 for placing the annular protrusion 31 of the burner head 3 on the outer ring. ) Is installed in reverse cone shape. The annular head 21 is a concave in which a part of the annular head 21 is deformed in the up and down direction on the side opposite to the direction in which the mixing pipe part 22 is extended to form a flat end and a communication hole 20 with the lower side is opened. The part 26 is formed. The recess 26 forms a lower space of the auxiliary chamber 12. In this embodiment, the communication port 20 is fan-shaped, and the flat end is formed to be inclined slightly downward.

The ignition electrode 14 is installed to face the communication port 20, the front end is located below the communication port 20, the flame between the ground electrode 30 protruding on the lower side of the burner head (3) The discharge interval is formed. The thermocouple 13 is installed in parallel with the ignition electrode 14 in a state where an upper end portion, which is a temperature sensing portion, protrudes from the communication port 20 into the upper auxiliary chamber 12.

Covered lead wires are connected to the thermocouple 13 and the ignition electrode 14, and these coated lead wires are connected to an electric device (not shown). Further, the tip of the ignition electrode 14 may be arranged above the communication port 20, of course.

In the burner head 3, the annular protrusion 31 is formed along the periphery of the outer peripheral part of the lower surface of the umbrella part 3B. The corresponding part of the auxiliary chamber 12 of the annular protrusion 31 enters into the inside, and the outer side is made into the recessed part 32, and forms the upper space of the auxiliary chamber 12. As shown in FIG. The annular protrusion 31 has a plurality of comb teeth 33 arranged in a radial direction, and the comb teeth 33 and 33 are slit rows of a predetermined depth. When the burner head 3 is placed on the burner body 2, the lower side of the annular protrusion 31 made of comb teeth 33 and 33 abuts the annular installation surface 25 and the slit row is mainly an annular main flame. A ring flame hole row 11 formed of holes is formed. Further, a few slits toward the auxiliary chamber 12 between the annular flame hole rows 11 are ignited by the ignition electrode 14 to form an auxiliary flame hole 15 for heating the thermocouple 13.

On the lower side of the umbrella portion 3B, elongated combs 34 and 34 are formed to partition the concave portion 32. The long combs 34, 34 are sandwiched between end walls 28 and 28 between the annular mounting surface 25 and the recess 26 and are positioned at the regular positions where the burner head 3 in contact with the burner body 2 is placed. It is a positioning mechanism for determining.

The flame prevention plate 6 is roughly arranged horizontally with a space G between the inner peripheral wall 27 of the skirt portion 2S of the annular head 21 and about 1 mm below the communication port 20. Radial side wall plates 62 and 63 installed on both sides of the vacancy-shaped bottom plate 61, the bottom plate 61, the inner wall plate 65 and the inner wall plate 65 in the direction of the center are the central air passage. It has the support plate part 66 formed to bend to the center side which is (4) side. The flame prevention plate 6 has the respective flanks 67 and 68 in the burner body 2 at the lower side of the communication port 20 with the flange portion 2A and the bracket 50 at the outer circumference of the annular head 21. A flameproof compartment 60 is formed to be sandwiched between and fixed and to surround the communication port 20 from the lower side.

In the flameproof section 60, when the burner head 3 is incorrectly set, the flame from the auxiliary flame hole 15 is formed downward through the communication port 20, and the wiring of the ignition electrode 14 and the thermocouple 13 is carried out. In order to prevent damage from occurring in contact with the part, the section is shielded by the flame arrester 6 and is successively passed through the gap G only downward. Moreover, this space | interval G is provided in order to supply secondary air for combustion to an auxiliary flame | hole hole from the lower side.

Denoted at 7 is a shielding member provided between the central air passage 4 and the auxiliary chamber 12 to prevent exhaust of the backflow of the central air passage 4 downward into the auxiliary chamber 12. In this embodiment, as shown in FIG. 4, the shielding member 7 is made of one press-formed metal partition plate, and is formed from an upper plate portion 71 provided so as to overlap the inner wall plate 65, and from the lower end of the upper plate portion 71. FIG. It becomes the return board part 72 extended inclined to the center side, and the lower board part 73 extended slightly lower than the return board part 72. As shown in FIG. The shield member 7 is integrally formed by spot welding the upper plate portion 73 to the inner wall plate 65 of the flame arrestor plate 6. The lower end of the lower plate part 73 is comprised so that it may protrude downward from the outer peripheral flange part 2A which is the lowest end of the annular head part 21. As shown in FIG.

Next, the operation of the shield member 7 will be described. When the ignition operation is performed during the use of the furnace, spark discharge is generated at the ignition electrode 14 to ignite the mixture gas ejected from the auxiliary flame hole 15, and the flame is formed in the entire annular flame hole column 11 mainly composed of the main flame hole. It moves and burns. The thermocouple 13 is heated by the flame of the auxiliary flame hole 15 to warm up, maintains the electronic safety valve open by electromotive force, and normal combustion continues. The secondary flame for combustion is supplied to the main flame hole of the annular flame hole row 11 from the outer periphery and the inner periphery of the flame. The secondary air for combustion from the inner circumference flows along the upper side of the burner head 3 through the annular spacing 43 with a portion of the rising air flow in the central air passage 4 and in the annular flame hole row 11. It is supplied above the main flame hole.

In the initial stage of ignition, since the temperature of burner components such as burner body 2 and burner head 3 is low, there is no rising air in the central air passage 4 and conversely, flame exhaust from the annular flame hole row 11 is performed. A part of the inlet penetrates into the heat shield 41 through the gap between the bottom of the pot and the heat shield 41, flows back to the central air passage (4) to the lower side of the go-ro burner (1). When the reversed exhaust gas enters into the auxiliary chamber 12 through the flameproof compartment 60 and the communication port 20 together with the secondary air for combustion from the gap G to the auxiliary flame hole 15, the secondary flame hole ( The oxygen concentration of the secondary air for combustion supplied to the flame of 15) decreases. For this reason, the flame of the auxiliary flame | hole hole 15 lifts, and heating of the thermocouple 13 becomes inadequate, and the output of the thermocouple 13 falls. As a result, it becomes in the same state as misfire and the safety valve malfunctions, which causes the valve to open and cannot maintain the ignition state.

The shielding member 7 prevents the exhaust which has flowed back through the central air passage 4 into the auxiliary chamber 12. For this reason, invasion of the exhaust gas into the auxiliary chamber 12 is prevented and the lift of the flame of the auxiliary flame hole 15 can be prevented. As a result, there is no malfunction of the safety valve and it can move smoothly from the ignition to the holding state. In particular, since the downdraft is deflected toward the center of the central air passage 4 by the plate portion 72, the effect of preventing the inflow of exhaust gas into the auxiliary chamber 12 is large. In addition, since the lower end of the lower plate portion 73 protrudes downward from the outer periphery flange portion 2A, the deflected downward exhaust air flow is reliably prevented from stopping in the annular head portion 21 and into the auxiliary chamber 12. Exhaust prevention effect of exhaust is big.

The shielding member 7 is not limited to the shape of the above embodiment, but the lower side of the burner body 2 needs to be separated for the smooth rise of the secondary air for combustion. It is preferable to be as compact as possible. In this embodiment, it is possible to prevent intrusion into the auxiliary chamber 12 of the exhaust gas flowing back from the central air passage 4 in a compact and simple configuration.

In addition, in the above embodiment, the flame prevention plate 6 is installed, but the operation and effect of the present invention can be achieved only by the shielding member 7. In addition, the present invention can be applied to the case of using a flame rod or a temperature resistive element as a misfire sensor instead of the thermocouple 13. Moreover, even in the case where only the ignition electrode 14 is mounted in the auxiliary chamber 12, the ignition property can be improved.

Claims (4)

A burner body having an annular head, an annular burner head detachably mounted on the annular head and forming an annular flame hole row at an outer circumference, and a central air cylinder formed at the center of the annular head and the annular burner head; A furnace, a heat shield passage coaxially attached to the upper side of the central air passage, a pot bottom temperature sensor installed at a center of the central air passage and the heat passage, and an auxiliary portion which is a part of the flame hole row disposed at the inner circumferential side; A go-ro burner having a communication port provided outside the flame hole and connected to the lower side of the annular head, and having an auxiliary chamber equipped with an ignition device or a misfire sensor facing the communication port. Between the auxiliary chamber, a shielding member is provided to prevent exhaust of the central air passage from flowing back into the auxiliary chamber. A stove burner, characterized in that. The go-ro burner according to claim 1, wherein the shielding member is a partition plate extending downward from a lower end of the central air passage. 3. The governing burner according to claim 2, wherein the partition plate is made of one sheet metal and has a return plate portion inclined toward the central air passage. The gourd burner according to claim 2, wherein a lower end of the partition plate extends below the lower end of the annular head.