Rich-lean combustion apparatus

Patent metadata

Field	Value
Publication number	US-9803856-B2
Application number	US-201415035681-A
Country	US
Kind code	B2
Filing date	Nov 13, 2014
Priority date	Nov 15, 2013
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

A rich-lean combustion apparatus includes a first plate and a second plate provided to face each other to allow a rich mixture to flow therebetween through a rich mixture passage, a third plate provided to allow a lean mixture to flow through a lean mixture passage formed between the second plate and the third plate, a first burner port member for combusting the rich mixture, and a second burner port member for combusting the lean mixture, wherein, between the first plate and the second plate, a mixture inlet into which some of air supplied from a ventilator and a fuel gas injected from a nozzle are introduced, a mixture passage introduction portion and a mixture passage diffuser for allowing the rich mixture flowed into through the mixture inlet to flow to the rich mixture passage, an air inlet into which the remaining of the air supplied from the ventilator is introduced, and an air passage introduction portion through which the air flowed into through the air inlet flows are formed, and wherein a plurality of air through-holes are formed to pass through the second plate to allow the air of the air passage introduction portion to be spouted into an air passage formed between the second plate and the third plate, and a plurality of distribution holes are formed to pass through the second plate to allow some of a mixture passing the mixture passage diffuser to be spouted into the lean mixture passage.

First claim

The invention claimed is:

1. A rich-lean combustion apparatus comprising:
a first plate 110 and a second plate 120 provided to face each other to allow a rich mixture to flow therebetween through a rich mixture passage 173 ;
a third plate 130 provided to allow a lean mixture to flow through a lean mixture passage 176 formed between the second plate 120 and the third plate 130 ;
a first burner port member 140 configured to combust the rich mixture; and
a second burner port member 150 configured to combust the lean mixture,
wherein, between the first plate 110 and the second plate 120 , a mixture inlet 161 into which some of air supplied from a ventilator 300 and a fuel gas injected from a nozzle 710 are introduced, a mixture passage introduction portion 171 and a mixture passage diffuser 172 for allowing the rich mixture flowed into through the mixture inlet 161 to flow to the rich mixture passage 173 , an air inlet 162 into which the remaining of the air supplied from the ventilator 300 is introduced, and an air passage introduction portion 174 through which the air flowed into through the air inlet 162 flows are formed, and
wherein a plurality of air through-holes 121 are formed to pass through the second plate 120 to allow the air of the air passage introduction portion 174 to be spouted into an air passage 175 formed between the second plate 120 and the third plate 130 , and a plurality of distribution holes 122 are formed to pass through the second plate 120 to allow some of a mixture passing the mixture passage diffuser 172 to be spouted into the lean mixture passage 176 .

2. The rich-lean combustion apparatus of claim 1 , wherein one side of the air passage introduction portion 174 is formed to extend from the air inlet 162 in a horizontal direction and the other side thereof is formed to occlude a flow of air, and the air through-hole 121 is formed in plurals along a length direction of the air passage introduction portion 174 and spaced apart from each other.

3. The rich-lean combustion apparatus of claim 2 , wherein a recessed groove 133 is concavely formed at a position of the third plate 130 corresponding to the distribution hole 122 in a direction thereof.

4. The rich-lean combustion apparatus of claim 3 , wherein at the third plate 130 , at least one dispersion embossed portion is formed at a lower portion of the recessed groove 133 so as to disperse the air spouted through the air through-hole 121 in the horizontal direction.

5. The rich-lean combustion apparatus of claim 1 , wherein the first plate 110 and the second plate 120 are made of a steel material having a surface coated with aluminum, and the third plate 130 , the first burner port member 140 , and the second burner port member 150 are made of a stainless material.

6. The rich-lean combustion apparatus of claim 1 , wherein a second burner port 151 is formed at the second burner port member 150 by spacing parts of a plurality of burner plates 152 apart from each other,
wherein the second burner port member 150 includes:
a plurality of upper recessed grooves 153 concavely formed at a surface coming in contact with the third plate 130 ; and
a plurality of lower recessed grooves 154 concavely formed and spaced from the upper recessed grooves 153 in a downward direction,
wherein a plurality of upper embossed portions 131 protruding to be insertable into the upper recessed grooves 153 and a plurality of lower embossed portions 132 protruding to be insertable into the lower recessed grooves 154 are formed at the third plate 130 , and
wherein the second burner port member 150 is interposed between the second plate 120 and the third plate 130 to be fixed by an insertion-coupling between the upper recessed grooves 153 and the upper embossed portions 131 , and between the lower recessed grooves 154 and the lower embossed portions 132 .

7. The rich-lean combustion apparatus of claim 6 , wherein the upper recessed groove 153 has a shape which is opened in an upward direction and is closed in a downward direction, and the lower recessed groove 154 has a shape which is closed in the upward direction and is opened in the downward direction.

Assignees

• Kyungdong Navien Co Ltd

Inventors

• Kim Sung Ki
• Min Myoung Gee

Classifications

• F23D14/045

  with a plurality of burner bars assembled together, e.g. in a grid-like arrangement · CPC title

• F23D2203/00

  Gaseous fuel burners · CPC title

• F23D2209/10

  Flame flashback · CPC title

• F23D14/08 Primary

  with axial outlets at the burner head · CPC title

• F23D14/10

  with elongated tubular burner head · CPC title