Patent EP0130742A2 successfully refreshed from Google Patents.
EP0130742A2
Expired / Lapsed
EP
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High load gas combustion apparatus
Assignee: Panasonic Holdings Corp
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Filing: 1984-06-21
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Granted: —
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Expires: 2004-06-21
Abstract
Abstract A high load gas combustion apparatus for use mainly in domestic combustors which require a low noise level and compactness. Some of air for burning supplied from a fan is suctioned to fuel gas jetted through a nozzle to produce a mixture in a mixing tube section, which is then introduced to a mixture chamber defined by a burner body having a uniform shape in the lengthwise direction. The mixture flows into a downstream combustion chamber at a relatively low speed through a flame port section which is incorporated in the burner body on the downstream side of the mixture chamber, and which comprises a number of flame ports having a large opening ratio. The majority of air is supplied to air chambers on both sides of the mixture chamber partitioned by the burner body therefrom. The air chambers and the combustion chamber are partitioned by an air jet plates which includes a number or air ports arranged in zigzag form in the oblique portion thereof and a number of flame retention air ports arranged in the lengthwise direction of the flame port section. Some of the air supplied to the air chambers is supplied under reduced pressure to a flame retention chamber, which is constituted by a recess formed in a part of the burner body on either side of the flame port section, through small gaps formed between the air jet plates and the side wall of the recess, and then flows into the combustion chamber at a lower speed from both sides of the flame port section through the flame retention air ports, thus ensuring flame retension. The majority of the air supplied to the air chambers flows into the combustion chamber through the air ports so as to cross the direction of flow of the mixture for producing steady flames along the air ports arranged in zigzag form, thus greatly enlarging the combustion reaction area.
Inventors
- 👤 Fumitaka Kikutani
- 👤 Masahiro Indou
- 👤 Koro Furumai
- 👤 Kazuo Fujishita
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 09:59
CPC Classifications
F; F23; F23D; F23D14/00; F23D14/26; F23D14/30; F23D14/34; F23D14/36; F23D14/46; F23D14/48; F23D14/58; F23D14/62
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
177 words
A high load gas combustion apparatus comprising; a fan adapted to supply air for burning; a nozzle adapted to jet fuel; a mixing tube section adapted to suction and mix primary air supplied from said fan with fuel in the downstream side of said nozzle; a mixture chamber communicating with said mixing tube section; a flame port section including a number of flame ports provided on the downstream side of said mixture chamber; a combustion chamber provided on the downstream side of said flame port section; air jet plates provided on both sides of said flame port section to extend in the lengthwise direction thereof and supply secondary air to said combustion chamber; each of said air jet plates having a number of air ports arranged in zigzag form extending in the lengthwise direction of said flame port section for jetting secondary air to cross the flow of a mixture jetted into said combustion chamber through said flame ports; and said air ports being continuously arranged so as to produce a continuous flame zone in zigzag form.
Claim 2
Dependent Claim
177 words
A high load gas combustion apparatus comprising; a fan adapted to supply air for burning; a nozzle adapted to jet fuel; a mixing tube section adapted to suction and mix primary air supplied from said fan with fuel in the downstream side of said nozzle; a mixture chamber communicating with said mixing tube section; a flame port section including a number of flame ports provided on the downstream side of said mixture chamber; a combustion chamber provided on the downstream side of said flame port section; air jet plates provided on both sides of said flame port section to extend in the lengthwise direction thereof and supply secondary air to said combustion chamber; each of said air jet plates having a number of air ports arranged in zigzag form extending in the lengthwise direction of said flame port section for jetting secondary air to cross the flow of a mixture jetted into said combustion chamber through said flame ports; and said air ports being continuously arranged so as to produce a continuous flame zone in zigzag form.
Claim 3
Dependent Claim
214 words
A high load gas combustion apparatus comprising; a fan adapted to supply air for burning; a nozzle adapted to jet fuel; a mixing tube section adapted to suction and mix primary air supplied from said fan with fuel on the downstream side of said nozzle; a mixture chamber communicating with said mixing tube section; a flame port section including a number of flame ports provided on the downstream side of said mixture chamber; a combustion chamber provided on the downstream side of said flame port section; air jet plates provided on both sides of said flame port section to extend in the lengthwise direction thereof and supply secondary air to said combustion chamber; each of said air jet plates having a number of air ports arranged in zigzag form extending in the lengthwise direction of said flame port section for jetting secondary air to cross the flow of a mixture jetted into said combustion chamber through said flame ports; said air ports being continuously arranged so as to produce a continuous flame zone in zigzag form; and a number of flame retention air ports arranged in the lengthwise direction of said flame port section to jet secondary air for flame retention at a relatively low speed substantially parallel to the flow of said mixture.
Claim 4
Dependent Claim
214 words
A high load gas combustion apparatus comprising; a fan adapted to supply air for burning; a nozzle adapted to jet fuel; a mixing tube section adapted to suction and mix primary air supplied from said fan with fuel on the downstream side of said nozzle; a mixture chamber communicating with said mixing tube section; a flame port section including a number of flame ports provided on the downstream side of said mixture chamber; a combustion chamber provided on the downstream side of said flame port section; air jet plates provided on both sides of said flame port section to extend in the lengthwise direction thereof and supply secondary air to said combustion chamber; each of said air jet plates having a number of air ports arranged in zigzag form extending in the lengthwise direction of said flame port section for jetting secondary air to cross the flow of a mixture jetted into said combustion chamber through said flame ports; said air ports being continuously arranged so as to produce a continuous flame zone in zigzag form; and a number of flame retention air ports arranged in the lengthwise direction of said flame port section to jet secondary air for flame retention at a relatively low speed substantially parallel to the flow of said mixture.
Claim 5
Dependent Claim
307 words
A high load gas combustion chamber comprising; a fan adapted to supply air for burning; a nozzle adapted to jet fuel; a mixing tube section adapted to suction and mix primary air supplied from said fan with fuel on the downstream side of said nozzle; at least one mixture chamber communicating with said mixing tube section; a flame port section including a number of flame ports provided on the downstream side of said mixture chamber and having a large opening ratio; a combustion chamber provided on the downstream side of said flame port section; a burner body of a uniform shape in the lengthwise direction incorporating said flame port section, surrounding said mixture chamber and provided with recesses on both side of said flame port section; a plurality of air chambers provided on both sides of said mixture chamber while being partitioned by said burner body and supplied with secondary air from said fan; flame retention chambers formed of each of said recesses and supplied with some of the secondary air from said air chamber in a depressurized condition; air jet plates adapted to form a partition between said combustion chamber and said air chambers'as well as between said combustion chamber and said flame retention chambers; a number of air ports arranged continuously in said air jet plates in zigzag form for jetting secondary air into said combustion chamber from said air chambers to cross the flow of a mixture jetted into said combustion chamber from said mixture chamber through said flame ports, thereby to produce a continuous flame zone; and a number of flame retention air ports arranged on said air jet plates in the lengthwise direction of said flame port section to jet secondary air for flame retention into said combustion chamber from said flame retention chambers substantially parallel to the flow of said mixture.
Claim 6
Dependent Claim
307 words
A high load gas combustion chamber comprising; a fan adapted to supply air for burning; a nozzle adapted to jet fuel; a mixing tube section adapted to suction and mix primary air supplied from said fan with fuel on the downstream side of said nozzle; at least one mixture chamber communicating with said mixing tube section; a flame port section including a number of flame ports provided on the downstream side of said mixture chamber and having a large opening ratio; a combustion chamber provided on the downstream side of said flame port section; a burner body of a uniform shape in the lengthwise direction incorporating said flame port section, surrounding said mixture chamber and provided with recesses on both side of said flame port section; a plurality of air chambers provided on both sides of said mixture chamber while being partitioned by said burner body and supplied with secondary air from said fan; flame retention chambers formed of each of said recesses and supplied with some of the secondary air from said air chamber in a depressurized condition; air jet plates adapted to form a partition between said combustion chamber and said air chambers'as well as between said combustion chamber and said flame retention chambers; a number of air ports arranged continuously in said air jet plates in zigzag form for jetting secondary air into said combustion chamber from said air chambers to cross the flow of a mixture jetted into said combustion chamber from said mixture chamber through said flame ports, thereby to produce a continuous flame zone; and a number of flame retention air ports arranged on said air jet plates in the lengthwise direction of said flame port section to jet secondary air for flame retention into said combustion chamber from said flame retention chambers substantially parallel to the flow of said mixture.
Claim 7
Dependent Claim
73 words
A high load gas combustion apparatus according to claims 1 to 3, said flame port section being so constructed that elongated flat plates are bent into zigzag form with a small curvature in the direction perpendicular to the direction of flow of said mixture so as to form an S-like flame port and an inverted S-like flame port which make contact with each other at the central part of said flame port section.
Claim 8
Dependent Claim
40 words
A high load gas combustion apparatus according to claims 1 to 3, said flame port section being so constructed that a porous flat plate is bent into polygonal or parabolic form and arranged to project into the combustion chamber side.
Claim 9
Dependent Claim
58 words
A high load gas combustion apparatus according to claims 1 to 3, said air ports arranged in zigzag form being further so arranged that a diverging angle of said air ports at the crest portion is smaller than that at the root portion with said crest portion projecting toward the downstream side in the form of a spire.
Claim 10
Dependent Claim
92 words
A high load gas combustion apparatus according to claims 1 to 3, said air jet plates each having a number of small projections between said air ports and said flame retention air ports to form a number of small gaps between the recess of said burner body constituting said flame retention chambers and the side wall of said recess on the air chambers side for communicating said air chambers with said flame retention chambers, so that secondary air is supplied to said flame retention chambers from said air chambers under reduced pressure.
Claim 11
Dependent Claim
42 words
A high load gas combustion apparatus according to claims 1 to 3, said flame retention air ports being disposed between said flame port section and those of said air ports arranged in zigzag form which are located near said flame port section.
References Cited (Backward Citations)
No citation records indexed.
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