Burner and applications thereof

Patent metadata

Field	Value
Publication number	US-12474047-B2
Application number	US-202118002162-A
Country	US
Kind code	B2
Filing date	Nov 29, 2021
Priority date	Nov 3, 2020
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A burner includes a housing, a fan, a burning head and an ignition mechanism. An air inlet of the housing and an input end of the burning head form a pressure equalizing cavity. The ignition mechanism is arranged at an output end of the burning head. The burning head includes a main frame and at least one stable burning isolation strip, an interior of the main frame is divided into at least two ventilation areas by the stable burning isolation strip in a gas channel direction. A plurality of separation mechanisms is arranged in each ventilation area and divide the ventilation area into a plurality of through holes arranged in the gas channel direction, the through holes are used for allowing mixed gas to pass through and strengthening the mixing effect. The burning flame of a burning surface of the main frame can be divided into mutually independent flames by the stable burning isolation strip. The burner can be used in gas stoves, low-nitrogen combustion engines for a gas boiler, gas water heaters and gas heating water heaters.

First claim

The invention claimed is:

1 . A burner comprising a housing, a fan, a burning head and an ignition mechanism, wherein:
the housing comprises an air inlet, the air inlet and an input end of the burning head form a pressure equalizing cavity; the fan blows a mixed gas comprising a fuel gas and air through the burning head to uniformly mix the mixed gas; the ignition mechanism is arranged at an output end of the burning head and is configured to ignite the mixed gas; the burning head comprises a main frame and at least one stable burning isolation strip; an interior of the main frame is divided into at least two ventilation areas by the at least one stable burning isolation strip in a gas channel direction; a plurality of separation mechanisms are arranged in each ventilation area and divide each ventilation area into a plurality of through holes; and the plurality of through holes are configured to allow the mixed gas to pass through;
wherein:
one or more of the at least one stable burning isolation strip is attached to a surface of the main frame, or penetrates the main frame in a thickness direction, or extends into the main frame by a preset length and one or more of the at least two ventilation areas are embedded in the main frame, or
one or more of the at least two ventilation areas and one or more of the at least one stable burning isolation strip are integrally fixed on the main frame, or
one or more of the at least two ventilation areas and one or more the at least one stable burning isolation strip form an integral structure;
each through hole has a cross-sectional area S hole satisfying 0.1 mm 2 ≤S hole ≤9 mm 2 ;
each ventilation area comprises a plurality of through holes and has a cross-sectional area S n satisfying 30 mm 2 ≤S n ≤22500 mm 2 ;
a thickness d hole of each separation mechanism satisfies 0.03 mm≤d hole ≤3 mm;
the main frame has a wall thickness d outer satisfying 0.03 mm≤d outer ≤50 mm;
the ventilation areas have a height h satisfying 4 mm≤h≤1000 mm;
each stable burning isolation strip has a width D 1 equal to a total length of three to ten through holes, and satisfying 2 mm≤D 1 ≤50 mm; and
the stable burning isolation strip is continuous or discontinuous, and a discontinuous section has a width D 2 that equals a total length of one or two through holes.

2 . The burner according to claim 1 , further comprises a micro-channel rectifier arranged in the pressure equalizing cavity, and a secondary gas pressure equalizing mixing cavity is formed between the micro-channel rectifier and the burning head.

3 . The burner according to claim 1 , wherein an air outlet of the fan is connected to the air inlet of the housing, and a fuel gas outlet of a fuel gas pipeline is connected to the burner upstream from the air inlet of the fan or downstream from the air outlet of the fan.

4 . The burner according to claim 1 , further comprising a smoke pipe, wherein the air inlet of the fan is connected to a smoke outlet of the housing, the smoke pipe is connected to the air outlet of the fan, and the fuel gas outlet of the fuel gas pipeline is connected to the burnder downstream from the air inlet of the housing.

5 . A gas stove comprising the burner according to claim 1 , wherein the housing comprises an inner-ring burner housing and an outer-ring burner housing, the burning head comprises an outer-ring burning head and an inner-ring burning head, the outer-ring burning head is arranged in the outer-ring burner housing, the inner-ring burning head is arranged in the inner-ring burner housing, a preset distance is provided between the inner-ring burning head and the outer-ring burning head; the fuel gas channel comprises a main pipeline, and an inner-ring burner fuel gas pipe and an outer-ring burner fuel gas pipe which are connected to the main pipeline, fuel gas output from the inner-ring burner fuel gas pipe enters an input end of the inner-ring burner burning head by means of an inner-ring burner fuel gas distribution structure, and fuel gas output from the outer-ring burner fuel gas pipe enters an input end of the outer-ring burner burning head by means of an outer-ring burner fuel gas distribution structure.

6 . A low-nitrogen burning machine for a gas boiler comprising the burner according to claim 1 .

7 . A gas water heater comprising the burner according to claim 1 , wherein the smoke pipe is connected to the output end of the burning head and a burning cavity is formed therebetween, a heat exchanger is arranged in the burning cavity for absorbing heat of high-temperature smoke in the burning cavity and transferring the heat to water in a coil pipe, and the smoke pipe is in connection with the smoke outlet of the housing.

8 . A gas-fired heating and hot water combi-boiler comprising the burner according to claim 1 , wherein the smoke pipe is connected to the output end of the burning head and a burning cavity is formed therebetween, a main heat exchanger is arranged in the burning cavity for absorbing heat of high-temperature smoke in the burning cavity and transferring the heat to water in a coil pipe, a secondary heat exchanger is used for transferring heat of primary heat exchange water from the main heat exchanger to secondary heat exchange water, and the smoke pipe is connected to the smoke outlet of the housing.

Assignees

• Dalian Inst Chem & Physics Cas

Inventors

• Li Weizhen
• Zhang Jingcai
• Zhang Tao

Classifications

• F24C3/082

  on stoves · CPC title

• F23D2213/00

  Burner manufacture specifications · CPC title

• F23D14/62

  Mixing devices; Mixing tubes · CPC title

• F23D14/26

  with provision for a retention flame (pilot flame igniters F23Q9/00) · CPC title

• F23C6/02

  in parallel arrangement · CPC title