Automatic device for modulating the flow of combustion air and gas in gas heating apparatus

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EP 0 326 880 A3

(12)	EUROPEAN PATENT APPLICATION

(88)	Date of publication A3:
	07.11.1990 Bulletin 1990/45

(43)	Date of publication A2:
	09.08.1989 Bulletin 1989/32

(21)	Application number: 89101018.3

(22)	Date of filing: 20.01.1989

(51)	International Patent Classification (IPC)⁴: F24H 9/20

(84)	Designated Contracting States:
	AT BE CH DE ES FR GB GR LI LU NL SE

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Priority:

01.02.1988 IT 1926788

(71)	Applicant: ING. A. BERETTA S.p.A.
	I-22053 Lecco Como (IT)

(72)	Inventor:
	Pastorino, Giorgio I-22053 Lecco Como (IT)

(74)	Representative: Liesegang, Roland, Dr.-Ing. et al
	FORRESTER & BOEHMERT Franz-Joseph-Strasse 38 80801 München 80801 München (DE)

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References cited: :

(54)	Automatic device for modulating the flow of combustion air and gas in gas heating apparatus

(57) The automatic modulator device of the flow combustion air and gas for a gas heating apparatus provided with a suction fan (5) for the suction of burnt gas comprises a control means (6) for controlling the number of revolutions of the suction fan depending on the desired water temperature, a pneumatic circuit connecting the inlet (10) of sucked combustion air to the firebox (1), a venturi (7) arranged at the inlet of said pneumatic circuit and a transducer (14) controlling the metering of the combustible gas.

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