JPH0539300Y2 - - Google Patents

Description

[Detailed explanation of the idea]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion apparatus equipped with a silent member.

[0002]

[Prior Art] Conventionally, a combustion device has a gas burner unit facing a combustion chamber, which is equipped with a combustion section having a large number of flame holes on the front side of a diffusion chamber into which a premixture of air and gas is forcibly introduced. It is generally known that in such a combustion device, if the premixture supplied to the combustion section is not in a rectified state, flame turbulence will occur.
It is also known that noise is generated due to this, and in addition, a system was developed in which a wire mesh or other siren member with a rectifying effect was installed on the back side of the combustion section to prevent the generation of such noise. It is known from the publication No.-43736. In addition, the silent member is composed of a laminated wire mesh or other perforated plate with numerous pores, and each perforated plate is provided with holes larger than the pores at positions that do not overlap with each other to prevent dust etc. from adhering to the perforated plate. Even if
The applicant had previously proposed a system in which the air-fuel mixture could be supplied to the combustion section through each vent hole.
No. 61-132064).

【0003】

[Problem to be solved by the invention] However, the perforated plates constituting the silent member have a relatively large area, and there is a risk that the perforated plates may loosen and come into close contact with each other. If a
In particular, when the holes are closely contacted, each hole is blocked by another stacked porous plate, and a passage for supplying the air-fuel mixture to the combustion section through the holes cannot be formed. The object of the present invention is to obtain a combustion device free of such defects.

[0004]

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a combustion section having a large number of flame holes on the front side of a diffusion chamber into which a premixture of air and gas is forcibly introduced. This is a gas burner unit that faces the combustion chamber, and has a
In the case where a silent part with a rectifying effect is provided, the silent member is composed of a laminated wire mesh or other perforated plate with numerous pores, and each perforated plate has holes that are sufficiently large compared to the pores. are provided at positions that do not overlap with each other, and protrusions are formed on the perforated plates to maintain the distance between the laminated perforated plates at the portions where the holes are provided.

[0005]

[Function] In the combustion device configured as described above, each perforated plate is spaced apart by the protrusion at the part where each perforated hole is provided, so there is always a space between each perforated plate at each perforated part. An interval is formed. Therefore, even if the pores of the perforated plate become clogged with dust, the perforated holes of each perforated plate do not overlap each other, but are still in communication through the gaps between each perforated plate. Through this, the air-fuel mixture can be continuously supplied to the combustion section.

[0006]

[Embodiment] The present invention will be explained with reference to an illustrative embodiment. In the figure, reference numeral 1 indicates a gas burner unit equipped with a combustion section 4 having a large number of flame holes 4a on the front surface of a diffusion chamber 2 into which a premixture of air and gas is forcibly introduced. A combustion plate 4b made of ceramic material or the like having a large number of flame holes 4a is attached to the front opening 3 of the combustion chamber.

[0007] A blower fan 5 and a gas nozzle 6 facing the negative pressure part of the blower fan 5 are communicated with the diffusion chamber 2, and the air from the blower fan 5 and the gas supplied from the gas nozzle 6 are mixed. and made it possible to supply this.

[0008] Reference numeral 7 indicates a combustion chamber provided at the front of the combustion section 4 of the gas burner unit 1, and the one shown is of a water heater type with a water heat exchanger 8 facing inside the combustion chamber 7.

[0009] In the drawings, reference numeral 9 indicates a gas control section interposed in a gas passage connected to the gas nozzle 6, and reference numeral 10 indicates a silent member provided on the back surface of the combustion section 4.

[0010] The configuration so far is not particularly different from what is conventionally known.

[0011] In the present invention, the silent member 10 is composed of a perforated plate 10a having numerous pores a such as laminated wire mesh, and each perforated plate 10a is provided with a hole a. In comparison, sufficiently large punching holes 15 are provided at positions that do not overlap each other, and a protrusion 14 is formed on each perforated plate 10a to maintain a distance between the stacked perforated plates 10a at the portion where each punched hole 15 is provided, In the embodiment shown in FIGS. 1 to 3, the perforated plate 10a is made of a wire mesh, and two pieces of this wire mesh are attached to a metal frame 13 formed in a rectangular shape that is approximately the same shape as the combustion section 4. Same type of packing 1
2, the upper wire mesh is provided with five holes 15, and around the holes 15 is provided a folded piece extending downward to form the protrusion 14, and the lower wire mesh is made of Five holes 15 in the upper wire mesh
The projections 14 are formed by providing five holes 15 at positions that do not overlap with each other, and by providing folding pieces extending upward around the holes 15. A protrusion 14 was interposed in the center portion including the punched hole portion to form an interval of about 5 mm between the wire meshes.

[0012] The extraction holes 15 are the pores a of the perforated plate 10a.
Even if the diffusion chamber 2 becomes clogged with dust,
The premixed air from the air can be supplied to the combustion section 4 side through this.In this case, each vent hole 15 is blocked by the other perforated plate 10a, but the protrusion 14
are formed along the direction in which the premixture flows, so they are less likely to get clogged. Therefore, even if the pores a in the part excluding the protrusion 14 become clogged with dust, etc., the premixture will flow in one direction. Holes 15 in the perforated plate 10a of
- Pore a of protrusion 14 - Pore a of protrusion 14 of the other perforated plate 10a - Flows through the path of extraction hole 15, combustion part 4
Supplied on the side.

[0013] The perforated plate 10a is not limited to a wire mesh, but may be a porous sintered metal plate or the like.

[0014] In addition, in this embodiment, wire meshes with different mesh sizes as each perforated plate 10a are used, for example, 10# and 20# wire meshes with a linear diameter of 0.5 mm are used, and the pore positions are shifted. Even if the pores a of each perforated plate 10a are relatively large, the pores a of the silent member 10 as a whole made up of laminated perforated plates 10a are made relatively small to reduce clogging and improve the rectification effect. I made it. However, this may also be done by shifting the pitch of the mesh of the 10# wire mesh by 1/2 or by shifting the direction of the mesh of the wire mesh by 45 degrees.

[0015] Note that the protrusion 14 does not need to cover the entire circumference of the extraction hole 15, and may be formed of a plurality of protrusions spaced at appropriate intervals.

[0016] In the embodiment shown in FIGS. 4 and 5, the silent member 10 is constituted by a perforated plate 10a having countless pores a made of two laminated wire meshes, and the two perforated plates 10a are In addition, holes 15 which are sufficiently larger than the pores a are provided at positions that do not overlap with each other. To explain this, a wire mesh constituting the perforated plate 10a is attached to a rectangular metal frame 13 having approximately the same shape as the combustion section 4, and two of the wire meshes are attached to the metal frame 13.
3 and the same type of packing 12, and holes 15 are provided near both sides of the upper wire mesh in the longitudinal direction, and 1 is placed in the center of the lower wire mesh.
Two parallel protrusions 14, 14 are provided in the upper wire mesh at positions corresponding to the punch holes 15 provided in the lower wire mesh, and two protrusions 14, 14 are provided in the lower wire mesh and in the upper wire mesh. Two protrusions 14, 14 are provided at positions corresponding to the holes 15 provided in the wire mesh, and the peripheral edge between each wire mesh is a packing 12, and each hole in the center is formed downward from the upper perforated plate 10a. A distance of about 5 mm was maintained between the protrusions 14, 14 which bulge out from the top and the protrusions 14, 14 which bulged upward from the lower perforated plate 10a.

[0017] In the drawing, 11 is a punching plate laminated on the back surface of the perforated plate 10a.

[0018] Also in this embodiment, each porous plate 1
It is preferable to shift the positions of the pores in the perforated plate 1 as in the embodiments shown in FIGS. 1 to 3.
0a is not limited to a wire mesh, but may also be a porous sintered metal plate or the like.

[0019]

[Effect of the invention] In the combustion device having the above configuration, the silent member is composed of a laminated wire mesh or other perforated plate with numerous pores, and each perforated plate has a size sufficiently large compared to the pores. In addition to providing the punched holes in positions that do not overlap each other, we also formed protrusions on each perforated plate to maintain the spacing between the laminated perforated plates in the area where each perforated plate was provided. , the distance is maintained by the protrusion. Therefore, the perforated plate does not loosen and the communication between the perforations is cut off, and the perforated perforations provided in each perforated plate can always be maintained in a state of communication through the intervals. Even if dust or the like adheres to the pores of the plate, the premixed gas can continue to be supplied to the combustion section through each hole.

[Brief explanation of the drawing]

[Figure 1] Cutaway side view of an example of implementing the present invention

[Figure 2] Exploded slope view of the main parts of Figure 1

[Figure 3] Cutaway side view of a part of it

[Figure 4] Exploded slope view of main parts of another embodiment

FIG. 5 is a cross-sectional view taken along line A-A in FIG. 4;

[Explanation of symbols]

1...Gas burner unit 2... Diffusion room 4... Combustion part 5...Blower fan 10...Silent member 10a...Porous plate 14...protrusion 15...Drilling hole a... Pore.

Claims (1)

[Scope of utility model registration request] A gas burner unit is equipped with a combustion section having a large number of flame holes on the front side of a diffusion chamber into which a premixture of air and gas is forcibly introduced, and the back side of the combustion section is placed facing the combustion chamber. In the case where a silent member with a rectifying effect is provided, the silent member is composed of a laminated wire mesh or other perforated plate with numerous pores, and each perforated plate has a sufficient number of holes compared to the pores. A combustion device comprising large punched holes provided at positions that do not overlap each other, and a protrusion formed on a perforated plate to maintain a distance between the laminated perforated plates at the portion where the punched holes are provided.