Combustion apparatus incorporating a noise reduction arrangement

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(11)

EP 2 187 124 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	21.12.2011 Bulletin 2011/51

(43)	Date of publication A2:
	19.05.2010 Bulletin 2010/20

(21)	Application number: 09014219.1

(22)	Date of filing: 13.11.2009

(51)

International Patent Classification (IPC):

F23M 3/08^(2006.01)

(84)	Designated Contracting States:
	AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
	Designated Extension States:
	AL BA RS

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Priority:

15.11.2008 GB 0820946

(71)	Applicant: Ideal Stelrad Group Limited
	Kingston-Upon-Hull East Yorkshire HU5 4JN (GB)

(72)	Inventors:
	Kirby, Neil Richard John Little Weighton, Cottingham East Yorkshire, HU20 3US (GB) Hickman, Peter Graham Cherry Burton, East Riding of Yorkshire HU17 7RH (GB)

(74)	Representative: Wilson Gunn
	5th Floor Blackfriars House The Parsonage Manchester M3 2JA Manchester M3 2JA (GB)

(54)	Combustion apparatus incorporating a noise reduction arrangement

(57) A combustion apparatus such as a boiler comprises a standing wave arm (15, 15') for establishing a standing wave connected to a flue gas outlet (14) of a burner (10) of the device. A gas flue outlet system (17) is connected to the standing wave arm at the zero pressure point or mid-point (16) of the standing wave. The standing wave arm (15, 15') is configured to generate a standing wave in proportion to one half of the wavelength of a resonant frequency to be attenuated.

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