JP2000227207A - Burner for portable combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burner for a portable combustor which is miniaturized, and ensure a high heat amount. SOLUTION: A burner for a portable combustor includes a mixed gas supply camber 28 communicated with a mixed gas supply hole 24 produced from fuel gas and all and a burner port plate 22 having a plurality of burner ports 21 each for injecting mixed gas. In the burner, a mixed gas diffusion member 25 is disposed at the supply hole 24 in the mixed gas supply chamber 28, and a porous member 26 is disposed on the side of the mixed gas supply camber 28 at least in the burner ports 21 of the burner port plate 22. Hereby, the mixed gas supplied into the mixed gas supply chamber 28 from the supply hole 24 is uniformly diffused, and hence the velocity of the mixed gas injected from the flame holes with the porous member 26 is restricted and mixing time of the gas and air in the mixed gas is lengthened and hence fresh air is prevented from invading into the mixed gas supply chamber 28 through the burner ports 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burner for a portable combustor, and more particularly, to a portable burner used for cooking or water heating outdoors, for example, in camping, mountain climbing, or field work. The present invention relates to a burner for a combustor.

[0002]

2. Description of the Related Art In general, a portable combustor of this kind is mounted on a gas cylinder as a fuel supply source to adjust a fuel gas amount, and mixes fuel gas supplied from the gas cylinder with air. A supply pipe having a mixed gas passage,
2. Description of the Related Art There is known a burner having a plurality of burners for ejecting a mixed gas, and a burner mounted on an outer peripheral portion of the burner.

[0003] In the portable combustor configured as described above, it is desired to reduce the size of the burner in order to make the burner easier to carry.

[0004]

However, when the size of the burner is reduced, the volume of the burner is reduced, so that the calorific value is reduced and a desired caloric value cannot be obtained. Therefore, it is necessary to increase the flow rate of the mixed gas by making the flame hole as large as possible. However, when the gas flow rate is increased, the velocity of the gas ejected from the burner flame increases, exceeding the burning rate, and there is a trade off problem that a part of the gas is ejected in an unburned state. .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a burner for a portable combustor which is small and can obtain a high calorific value.

[0006]

To achieve the above object, a burner of a portable combustor according to the present invention comprises a mixed gas supply chamber communicating with a supply port of a mixed gas generated by fuel gas and air; A burner for a portable combustor comprising a flame plate having a plurality of flame holes for ejecting the mixed gas,
A mixed gas diffusion member is provided at the supply port in the mixed gas supply chamber, and a porous member is provided at least on the side of the mixed gas supply chamber in the flame holes of the flame hole plate. And

In the present invention, the mixed gas diffusing member may be of any shape or structure as long as it diffuses the mixed gas supplied from the supply port into the mixed gas supply chamber. It is better to form it with a net-like member that is bent in a hemispherical shape toward the supply chamber (claim 2).

The porous member has a structure that prevents air from entering the mixed gas supply chamber through the flame hole and suppresses the velocity of the mixed gas ejected from the flame hole. Any material may be used, but it is preferable that the porous member be formed of a plurality of mesh members facing each other at intervals or formed of a sintered body. ).

In addition, as long as the above-mentioned burner plate has a plurality of burner holes, the shape of the burner plate and the shape of the burner hole may be arbitrary. For example, the burner plate may be formed in a truncated cone shape. Then, a flame hole can be formed in the conical portion (inclined portion). In such a case, it is preferable to gradually increase the diameter of the flame hole from the inner peripheral side to the outer peripheral side.

According to the burner of the portable combustor of the present invention configured as described above, the mixed gas supplied from the supply port into the mixed gas supply chamber is uniformly diffused into the supply chamber by the mixed gas diffusion member. Can be. Moreover, while suppressing the velocity of the mixed gas ejected from the flame hole by the porous member, the mixing time of the gas and air in the mixed gas is lengthened, and external air is introduced into the mixed gas supply chamber through the flame hole. It can be prevented from entering. Therefore, the size can be reduced, and the gas combustion efficiency can be improved.

[0011]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIG. 1 is a schematic sectional view showing an example of a use state of a portable combustor having a burner of the present invention, FIG. 2 is a sectional view showing a first embodiment of the burner, and FIG. 2 is an enlarged sectional view of a part III in FIG. 2, and FIG. 4 is an exploded perspective view of the burner.

The portable combustor includes a gas regulator 2 mounted on a fuel supply source, for example, a supply port of a liquefied petroleum gas (LPG) cylinder 1, and is detachably connected to the gas regulator 2. , Supplied fuel gas, that is, vaporized L
Mixed gas passage 11 for mixing PG (LPG gas) with air
And a plurality of mixed gas jetting flame holes 21 for jetting the mixed gas generated by the feeding pipe 10.
And a burner 20 attached to the outer peripheral portion of the burner 20.

As shown in FIGS. 1, 2 and 4, the burner 20 is formed in a truncated conical shape, and has a conical portion (inclined portion).
A mixed gas supply chamber 28 is constituted by a flame hole plate 22 having a large number of flame holes 21 formed therein and a bottom plate 23 closing a lower end opening of the flame hole plate 22. Above the provided mixed gas supply port 24, that is, on the mixed gas supply chamber 28 side, a mixed gas diffusion member 25 formed of a hemispherical net-like member bent toward the inside of the mixed gas supply chamber 28 is provided. I have.

In this case, the flame holes 21 are provided in a staggered manner in the radial direction of the flame hole plate 22, and the diameter of the hole gradually increases from the inner peripheral side to the outer peripheral side of the flame hole plate 22.
That is, as shown in FIG. 4, a first group of flame holes 21a drilled on the innermost concentric circle of the flame hole plate 22, and a second group of flame holes drilled concentrically on the outside thereof. 21b, third group of flame holes 2 drilled on concentric circles outside the second group of flame holes 21b
Assuming that 1c and the fourth group of flame holes 21d formed on the outermost concentric circle, the relationship between the diameters of the flame holes 21a to 21d of each group is 21a <21b <21c <21d. As described above, by gradually increasing the diameter of the flame holes 21 (21a to 21d) toward the outer peripheral side, the amount of the mixed gas injected from each of the flame holes 21 on the inner peripheral side and the outer peripheral side is made equal, and The height of the flame can be the same.

In addition, near the inner lower surface of the flame hole plate 22, air is prevented from entering the burner from the outside, and
A porous member 26 is provided, which suppresses the velocity of the mixed gas passing through the gas and increases the mixing time of the gas and air in the mixed gas. As shown in FIG. 3, the porous member 26 includes a plurality of, for example, two truncated conical net-like members 2.
6a and 26b are stacked with a slight gap s (interval). In this case, the porous member 26, ie, 2
The mesh members 26a and 26b are arranged on the entire area near the inside of the flame hole plate 22. However, the mesh members 26a and 26b do not necessarily need to be arranged on the entire area of the flame hole plate 22; The member 26 (mesh members 26a and 26b) may be provided. The flame hole plate 22, the porous member 26, ie, the two net members 26a and 26b, and the mixed gas diffusion member 25
At the same time as being fixed by the rivets 27, the flame hole plate 22 and the mesh members 26 a and 26 b are caulked and fixed to the edge of the bottom plate 23.

By configuring the burner 20 as described above, the mixed gas supplied through the supply pipe 10 passes through the mixed gas diffusion member 25, so that the mixed gas can be diffused and made uniform. it can. Also, the porous member 26
As a result, the mixing time of the gas and the air is lengthened, and the gas is mixed to form the flame holes 21 (21a to 21a).
21d). Further, the porous member 26 can prevent external air from entering the mixed gas supply chamber 28 through the flame hole 21. Accordingly, the burner 20 can be reduced in size, and a high calorific value and a high calorific value can be obtained.

In the above description, the porous member 26 is
Although the description has been made of the case where the porous member 26 is formed by the three net members 26a and 26b,
May be formed.

The supply pipe 10 is provided on the bottom plate 2 of the burner 20.
The tube base 12 is fixed (fixed) to a supply port 24 provided in the tube 3 by caulking, and a tube auxiliary portion 13 foldably connected to the tube base 12. In this case, a concave spherical engaging recess 14 is provided on the inner wall surface of the mixed gas passage 11 provided in the tube base 12, and the engaging concave A small notch 15 is provided. Further, a ring receiver 16 fixed to the distal end portion of the tube base portion 12 by caulking is provided with a locking receiving portion 17 that opens to the distal end side.

Further, the tube body auxiliary portion 13 includes a tube base portion 12.
A mixed gas passage 11 communicating with the mixed gas passage 11 is provided, and a spherical bulging portion 40 slidably fitted in the engaging concave portion 14 and a neck portion 41 that can be stored in the cutout portion 15 are provided. Is provided. Furthermore, on the outer periphery of the neck 41,
A ring-shaped stopper member 42 that can be engaged and disengaged from the lock receiving portion 17 is slidably loosely fitted. The stopper member 42 always bears a spring member 43 that urges the elastic force toward the locking receiving portion 17 side. That is, the stopper member 4
The stopper member 42 is constantly pressed toward the lock receiving portion 17 by the elastic force of the spring member 43 contracted between the end portion 2 and the distal end side step portion 44 provided in the tube body auxiliary portion 13. Further, a female screw portion 1 that is screwed with a male screw portion 3a of a supply port 3 provided in the gas amount controller 2 is provided at a distal end portion of the tube body auxiliary portion 13.
In the vicinity of the female screw portion 13a, a plurality of, for example, four air introduction holes 45 for introducing outside air into the mixed gas passage 11 of the supply pipe body 10 are provided in the circumferential direction. It is configured to generate a mixed gas.

The supply tube 10 configured as described above is
As shown in FIG. 1, the stopper member 42 is engaged with the locking receiving portion 17 of the tube base 12, and is held by the elastic force of the spring member 43, so that the tube base 12 and the tube auxiliary portion 13 are held. Are connected in a straight line. And the pipe auxiliary part 13 can be attached to the supply port 3 of the gas amount controller 2 and used for use. After use, after the tube auxiliary part 13 is removed from the supply port 3 of the gas amount controller 2, the engagement between the stopper member 42 and the lock receiving part 17 is prevented against the elastic force of the spring member 43. Is released, and the tube assisting portion 13 can be rotated in the direction of the arrow A in FIG. 1 to fold the neck 41 into a state in which the neck 41 is accommodated in the cutout portion 15 of the tube base 12.

The key 30 is provided with a substantially L-shaped base member 31 fixed to the outer peripheral portion of the burner 20 with a fixing screw 36, and a keyhole-shaped engagement provided on a vertical piece 31a of the base member 31. An intermediate member 32 having a square shaft 38 that is rotatably and lockably engaged with the hole 34, is foldably pivotally attached to a distal end portion of the intermediate member 32 with a pivot pin 39, and is provided on the intermediate member 32. The support member 35 mainly includes a plurality of (for example, four) support members 35 each of which includes a distal end member 33 that is engaged with the stopper portion 32a and held in an expanded state.

In operation, the intermediate member 32 is attached to the rectangular portion of the engagement hole 34 of the base member 31 in use.
Are engaged and the tip member 33 is engaged with the stopper portion 32a of the intermediate member 32, and is deployed and erected. When not in use (when carrying), the square shaft 38 of the intermediate member 32 is engaged with the circular portion of the engagement hole 34 of the base member 31 as shown by a two-dot chain line in FIG. 3
In a state where the engagement between the stopper portion 32a and the tip member 33 is released, the intermediate member 32 and the tip member 33 are connected to the burner 2.
It is folded near the bottom of 0.

The gas amount controller 2 has a gas amount adjusting valve mechanism (not shown) and an adjusting knob 4 for adjusting the valve mechanism.

In the portable combustor configured as described above, the length of the tube base 12 of the supply tube 10 is made to correspond to the height of the folded virtues 30 so that the height direction (vertical direction) ) Can be made as small as possible, and in the width direction (horizontal direction), the tip of the base member 31 and the tip of the tube body auxiliary portion 13 project slightly from the burner 20. Therefore, the overall volume can be reduced. Therefore, it can be stored in a case or the like having substantially the same size as the cigarette case as a set together with the gas amount controller 2, and can be carried in a state of being put in a pocket of clothes.

Second Embodiment FIG. 5 is a sectional view showing a second embodiment of the burner according to the present invention, and FIG. 6 is an enlarged sectional view of a portion VI in FIG.

In the second embodiment, a sintered body 2 obtained by sintering a large number of particles 26c such as a metal powder or a green compact, for example, instead of the porous member in place of a plurality of mesh members 26a and 26b.
6A. By forming the porous member from the sintered body 26A in this manner, the mixed gas supply chamber 28
When the mixed gas in the gas blows out from the flame hole 21, the sintered body 26
Since the gas flows by bypassing the cavity 26d between the A particles 26c, the velocity of the gas can be suppressed, and the mixing time of the gas and the air can be lengthened. Also, the porous member 26A
Accordingly, it is possible to prevent external air from entering the mixed gas supply chamber 28 through the flame hole 21.

Since the other structure of the burner 20 is the same as that of the first embodiment, the same portions are denoted by the same reference numerals and description thereof will be omitted.

◎ Other Embodiments In the above embodiment, the case where the mixed gas supply pipe 10 is formed so as to be foldable by the pipe base 12 and the pipe auxiliary section 13 has been described. As shown, the supply pipe body 10A may be formed by an integral tubular member having the mixed gas passage 11 and the air introduction hole 45.

In the above embodiment, the case where the shape of the burner 20 is formed as a truncated cone is described.
The shape of the burner 20 does not necessarily have to be a truncated cone, but may be, for example, a hemisphere.

[0031]

As described above, according to the present invention, the mixed gas supplied from the supply port into the mixed gas supply chamber can be uniformly diffused into the supply chamber by the mixed gas diffusion member. The porous member suppresses the velocity of the mixed gas ejected from the flame hole, increases the mixing time of the gas and air in the mixed gas, and allows external air to enter the mixed gas supply chamber through the flame hole. Therefore, the size can be reduced and the gas combustion efficiency can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing an example of a portable combustor having a burner according to the present invention.

FIG. 2 is a sectional view showing a first embodiment of a burner according to the present invention.

FIG. 3 is an enlarged sectional view showing a part III in FIG. 2;

FIG. 4 is an exploded perspective view of the burner.

FIG. 5 is a sectional view showing a second embodiment of the burner according to the present invention.

FIG. 6 is an enlarged sectional view showing a VI part in FIG. 5;

[Explanation of symbols]

 Reference Signs List 20 burner 21, 21a to 21d flame hole 22 flame hole plate 23 bottom plate 24 supply port 25 mixed gas diffusion member 26, 26A porous member 26a, 26b mesh member 26c particle 26d cavity s gap (interval)

Claims (4)

[Claims] 1. A portable combustor comprising: a mixed gas supply chamber communicating with a supply port of a mixed gas generated by fuel gas and air; and a flame plate having a plurality of flame holes for ejecting the mixed gas. In the burner, a mixed gas diffusion member is disposed at the supply port in the mixed gas supply chamber, and a porous member is disposed at least on the side of the mixed gas supply chamber at the flame hole of the flame hole plate. A portable burner burner, characterized in that: 2. The portable burner according to claim 1, wherein the mixed gas diffusion member is formed of a net-like member that is bent in a hemispherical shape toward the mixed gas supply chamber. Combustor burner. 3. The burner for a portable combustor according to claim 1, wherein said porous member is formed of a plurality of mesh members facing each other at intervals. 4. The burner for a portable combustor according to claim 1, wherein said porous member is formed of a sintered body.