JPH0552520U - Surface burning burner - Google Patents

Abstract

(57) [Summary] [Structure] A porous member 11 forming a combustion surface on the front surface,
A casing 2 extending from the vicinity of the outer periphery of the porous member 11 toward the rear surface, a mixed gas chamber 40 formed by the porous member 11 and the casing 2, and a combustion gas mixture supplied to the mixed gas chamber 40. In the surface combustion burner 1 having an opening 9 for forming the casing 2, the casing 2 is composed of a tubular portion and a bottom portion 5, and the porous member 1 is provided on the front end side of the tubular portion.
1 is supported, and the bottom portion 5 is detachably attached to the rear end portion thereof by using an appropriate locking means such as a screw 8. [Effect] Member materials such as a porous material and a packing having a relatively short life can be easily replaced, maintenance is easy, and the life of the burner itself can be extended. Also, the overall shape can be made compact.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a surface-combustion burner, and more particularly to a surface-combustion burner in which the life of the burner itself is improved by making it possible to easily replace each member that constitutes the burner.

[0002]

[Prior art]

 Conventionally, a planar porous member made of, for example, ceramic, having pores communicating enough on the front and back sides to allow the combustion gas mixture to diffuse is provided, and the combustion gas mixture is supplied to the back surface thereof to diffuse the combustion gas mixture. Meanwhile, a surface combustion burner is known, which reaches the front surface of the planar porous member and is ignited and burned in the vicinity of the front surface. This type of surface combustion burner heats and heats a flat porous member to incandescent, and most of the energy is released as radiant heat, and the thermal conductivity of a porous member such as ceramic is usually small. Since the backside temperature does not rise so much even if the combustion temperature of the burner is considerably raised, it is possible to prevent the occurrence of flashback, and it is used in a wide range of fields as a burner with high thermal efficiency, not limited to household burners. ..

A typical configuration of the surface combustion burner will be described with reference to FIGS. 2 and 3. In the surface combustion burner 10 shown in FIG. 2, the square or circular planar porous member 11 has a heat resistance. It is mounted on the front side of a cylindrical casing 13 via a packing 12. The front end of the casing 13 is bent inward in an L-shaped cross section to form a flange 14, and the flange 14 positions the porous member 11 in the front direction.

Inside the casing 13, combustion gas distribution means 20 for diffusing the combustion gas mixture and distributing it uniformly on the back surface of the planar porous member 11 is located. The combustion gas distribution means 20 is made of the same material as the casing 13, and includes a baffle plate 21 positioned in parallel with the planar porous member 11 and an annular member 22 fixed to the outer peripheral portion of the baffle plate 21 by an appropriate means. It consists of The annular member 22 has a U-shaped cross-sectional shape as shown in FIG. 2, and forms a circulation path 26 therein, and the baffle plate 21 is sandwiched between the inner peripheral wall portion 23 thereof. A plurality of openings 24 and 25 are formed in the front and the rear, respectively. The shape of the outer peripheral portion of the annular member 22 is the same as the shape of the inner peripheral wall portion of the casing 13, and is press-fitted into the casing 13 from the rear side so that the back surface of the planar porous member 11 is the front surface thereof and the flange of the casing. It is supported while being pressed against 14.

The combustion gas distribution unit 20 is supported by a back plate 30 having the same shape as the inner peripheral wall portion of the casing 13. The outer peripheral edge portion of the back plate 30 constitutes a bent portion 31, and the front end of the bent portion 31 and the rear end portion of the casing 13 are welded 35 over the entire circumference thereof. Further, a cylindrical tube 32 is fixed to the central portion of the back plate 30 by an appropriate means, and the cylindrical tube 32 is connected to a combustion gas supply source through an appropriate piping means (not shown).

Therefore, the casing 13, the flat porous member 11 and the back plate 30 form a mixed gas chamber 40 which is a closed space, and the mixed gas chamber 40 constitutes the combustion gas distributing means 20. The circulation path 26 defined by the member 22 and the casing 13, the front mixed gas chamber 41 defined by the planar porous member 11 and the baffle plate 21, the baffle plate 21 and the back plate 30 are defined. It is divided into a rear mixed gas chamber 42.

The combustion of this surface combustion burner is performed as follows. A combustion gas mixture from an appropriate gas source is press-fitted into the rear mixed gas chamber 42 from the cylindrical member 32. The injected combustion gas mixture collides with the baffle plate 21 and changes its flow direction, enters the circulation path 26 from the opening 25 provided in the inner peripheral wall portion 23 of the annular member 22, changes its direction again, and then the opening 24 Flows into the front mixed gas chamber 41. Meanwhile, the combustion gas and the air are well mixed and homogenized. The homogenized combustion gas mixture passes from the back surface of the planar porous member 11 through the continuous pores to the front surface, where it is ignited and burned. Due to the combustion, the front surface of the planar porous member 11 becomes incandescent, and radiant heat is emitted.

FIG. 3 shows another example of the surface combustion burner. This surface combustion burner 50 is also similar to the surface combustion burner 10 shown in FIG. 2 in that the planar porous member 11 is mounted on the front side of the cylindrical casing through the heat resistant packing 12, Thing structure is different. The casing 51 has a bottomed tubular shape with a front opening, and a front end integrally has a flange 52 that is bent outward in an L-shape and has a plurality of openings 53 in the peripheral portion. A cylindrical tube 55 as an inlet for combustion gas is fixed to the bottom portion 54 by an appropriate means.

Combustion gas distribution means 60 is inserted in the casing 51. The combustion gas distribution means 60 is the same as the surface combustion shown in FIG. 2 except that the annular member 62 has a substantially L-shaped cross section. It has the same structure as the combustion gas distribution means 21 of the burner 10, and detailed description thereof will be omitted. In this burner, after the combustion gas distribution means 60 is inserted into the casing 51, a flat porous member 11 having the same shape as the inner peripheral surface of the casing 51 is arranged, and a predetermined width is further provided thereon. Place heat resistant packing 12. Finally, it is made of the same heat-resistant material as the casing 51 and has an opening 57 having a width capable of simultaneously covering both the flange 52 portion of the casing 51 and the heat-resistant packing 12 and facing the opening 53 in the peripheral portion. The fastening piece 56 is attached to the front surface portion of the casing 51, and is integrally fixed to the casing 50 with the screw 70.

The combustion of the surface combustion burner is carried out in substantially the same manner as the surface combustion burner 10 shown in FIG.

[0011]

[Problems to be solved by the device]

 The surface combustion burner as described above is extremely effective in terms of effective utilization of heat and safety. However, since the heat of combustion generated during combustion is extremely high, it cannot always be said that the equipment has a sufficient life. In particular, the porous material is usually a sintered body of long fibers made of an alloy of iron, chromium, silicon, aluminum, yttrium, etc., and has a heat resistance of 1200 ° C or higher. The same packing that has high heat resistance, such as ceramic fiber sheet, is used.However, in this type of combustion equipment, combustion state and non-combustion state are frequently repeated, and as a result, the entire device is heated. And cooling can be repeated frequently. As a result, among the materials forming the burner, the porous material and the heat-resistant packing are quickly fatigued, and the life of the burner itself is affected.

In the burner of the type shown in FIG. 2, the porous material and the heat-resistant packing are enclosed in the front end position of the casing 13 integrally formed with the L-shaped flange 14, and the back side is sealed. Since the front end of the bent portion 31 of the outer peripheral edge of the face plate 30 and the rear end of the casing 13 are weld-stopped 35 over the entire circumference thereof, it is practical to disassemble the burner and replace the internal member. It is not possible and even if the combustion gas distribution means 20 inserted in the casing 13 or its interior endures sufficient use, if the porous material or the heat-resistant packing is damaged, the entire burner must be replaced. It has the inconvenience of having to do it.

In the case of the type shown in FIG. 3, since the fastening plate 56 is detachably attached to the casing 51 with the screw 70, the porous material and the heat resistant packing are damaged. At this time, the screw 70 is released to remove the fastening plate 56 from the casing 51, so that only the porous material and the heat-resistant packing can be replaced. However, since the screwed position is close to the combustion position on the front surface of the burner, the screwed part is exposed to extremely high temperature, and in the same way, heating and cooling are frequently repeated, As a result, the screw itself is damaged, and it becomes impossible to disengage the screw and it becomes impossible to replace the porous material and the heat-resistant packing.

Further, in the burner having the above-described structure, when the screw fastening portion is formed in or very close to the high temperature combustion portion, for example, when the screw engaging portion is formed on the inner side surface of the casing 51, The heat damage generated in the screw engagement part is likely to cause gas leakage from it, and in order to avoid it, the screw engagement part must be positioned away from the combustion part, Therefore, the flange 52 is forced to have an outwardly extending shape, and the overall shape of the burner is inevitably large.

An object of the present invention is to eliminate the above-mentioned structural inconveniences of the conventional surface combustion burner. More specifically, the burner itself can be easily disassembled and assembled. Therefore, it is intended to facilitate the maintenance of the burner by facilitating the exchange of the internal member and to obtain the burner having a long life. The present invention also aims at obtaining a compact surface combustion burner as a whole.

[0016]

[Means for Solving the Problems]

 In order to solve the above problems and achieve the object, the present invention provides a porous member having a combustion surface on the front surface, a casing extending from the vicinity of the outer periphery of the porous member toward the rear surface, and the porous member. In a surface combustion burner having a mixed gas chamber formed by a casing and a casing, and an opening for supplying a combustion gas mixture to the mixed gas chamber, the casing includes a tubular member and a bottom member, A surface combustion burner, characterized in that the porous member is supported on the front end side of the tubular member, and the bottom member is detachably attached to the rear end portion thereof by using an appropriate locking means. Disclose.

It is a preferable embodiment that a screw connection is used as the locking means. Further, as the material constituting the casing, the porous member, etc. constituting the burner according to the present invention, the material used for the burner having the conventional structure can be used as it is.

[0018]

【Example】

 Hereinafter, the present invention will be described in more detail based on the description of one embodiment. FIG. 1 shows a sectional view of an embodiment of a surface combustion burner 1 according to the present invention. Since this embodiment has the same shape as the surface combustion burner 10 described above with reference to FIG. 2 except for the shapes of the casing and the back plate, the same members are designated by the same reference numerals. In addition, detailed description thereof will be omitted.

In the surface combustion burner 1, the casing 2 in which the porous member 11 and the heat-resistant packing 12 are mounted on the front side has a flange 3 which is bent toward the inside at the front end in an L-shaped cross section and has a rear portion. The end is open. A plurality of screw holes 4 and 4 are engraved at appropriate intervals at the open end of the casing 2. The open end portion of the casing 1 is closed by a back plate 5 (bottom member) having the same shape as the outer peripheral portion. That is, a plurality of openings 6 are formed in the vicinity of the outer peripheral edge of the back plate 5 at positions facing the screw holes 4 and 4 provided in the casing 2, and the second packing made of a heat resistant material is formed. The screw member 8 is integrally attached to the casing 1 with the screw member 7 sandwiched. Reference numeral 9 is an inlet for the combustion gas mixture, which is fixed to the back plate 5 by an appropriate means.

The surface combustion burner 1 has the same combustion action as the burner shown in FIGS. 2 and 3, and the description thereof will be omitted. In the surface combustion burner according to the present invention, the casing 2 and the back plate 5 can be easily separated by releasing the engagement of the screw 8. As shown in the figure, since the screw engaging portion is located at the position completely opposite to the surface combustion portion, the high temperature in the combustion area is hardly conducted to the screw engaging portion, and the screw member 8 becomes high temperature. Can be avoided. As a result, even if combustion and non-combustion of the burner are repeated frequently, the deterioration and damage of the screw members will not occur for a long period of time, and the most severely damaged porous member or heat-resistant packing needs to be replaced at any time. The burner life can be extended as a result.

Further, since the screwed portion is located at the rear end portion of the casing, that is, at a position where it is not exposed to high temperature, heat damage is not considered, and therefore, as shown in FIG. 3, a flange extending outward is not used. It is not necessary to form and use that part as a screwed part, but it is possible to form a screw hole in the casing itself and use that part as a screwed part, and as a result, it is a surface combustion burner with the same combustion area. , It is possible to make the whole shape compact.

In the above-described embodiment, the shape of the mixed gas chamber has the above-described circulation path 26 defined by the annular member 22 constituting the combustion gas distribution means 20 and the casing 13, and the planar porous member 11. The mixed gas chamber 41 is divided into the front mixed gas chamber 41 and the rear mixed gas chamber 42 defined by the baffle plate 21 and the back plate 30. However, this is not limited to this. This is merely an example, and the point is that if the shape is such that it can be removably attached to the open end side of the member forming the casing by the back plate equivalent body, the shape can be any conventionally known shape. It will be easily understood that it can be used.

Further, the locking means is not limited to screw connection, and any means capable of removably mounting the back plate equivalent body in a sealed state on the open end side of the casing, for example, a hook-shaped clamp or the like. Any means of can be used.

[0024]

[Effect of the device]

 Since the surface-burning burner according to the present invention has the above-described structure, it is possible to easily replace easily damaged members such as porous material and packing, which facilitates maintenance and extends the life of the burner itself. The life can be extended. Also, the overall shape can be made compact.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of a surface combustion burner according to the present invention.

FIG. 2 is a sectional view showing a conventional example.

FIG. 3 is a sectional view showing another conventional example.

[Explanation of symbols]

1 ... Surface combustion burner, 2 ... Casing, 3 ... Flange,
5 ... Back plate, 8 ... Screw, 11 ... Porous material, 12 ... Packing, 20 ... Combustion gas distribution means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Mitsuru Tobitano 6-18, 2-1116 Minamioi, Shinagawa-ku, Tokyo

Claims (1)

[Scope of utility model registration request] 1. A porous member having a combustion surface on its front surface,
A casing extending from the vicinity of the outer periphery of the porous member toward the rear surface, a mixed gas chamber formed by the porous member and the casing, and an opening for supplying a combustion gas mixture to the mixed gas chamber. In the surface combustion burner, the casing is composed of a tubular member and a bottom member, the porous member is supported on the front end side of the tubular member, and an appropriate locking means is used at the rear end thereof. A surface combustion burner, wherein the bottom member is detachably mounted.