EP 0025622 A1 19810325 - Device for heating a fluid.
Title (en)
Device for heating a fluid.
Title (de)
Vorrichtung zum Erwärmen eines Fluids.
Title (fr)
Dispositif pour chauffer un fluide.
Publication
Application
Priority
NL 7906945 A 19790918
Abstract (en)
A device for heating a fluid, for example, in a central heating boiler, comprising a heat exchanger (7) in the fluid conduit, a liquid or gaseous fuel burner (2) associated with said heat exchanger (1) and a housing (5) enveloping the heat exchanger (1) and the burner (2) to form a combustion channel having an inlet (6) for the combustion air and an outlet (7) for the exhaust gases, as well as a blowing apparatus (8) for producing a forced transport of combustion gases through the channel, wherein a pressure-difference switch (9) communicates on the one hand through a conduit (14) with a measuring point (P1) of the channel near the blowing apparatus and on the other hand throuwh a further conduit (17) with a second measuring point (P2) further remote from the blowing apparatus (8) in the channel, said switch (9) controlling a valve (4) in the fuel supply and in the further conduit a second valve (18) controlled by the pressure-difference switch (9) is included, said second valve (18) establishing a communication between the other side of the pressure-difference switch (9) with the atmosphere when the fuel valve (4) is closed in order to providing a sufficiently high pressure difference for overcoming the resistances in the various valves.
IPC 1-7
IPC 8 full level
CPC (source: EP)
F23N 1/065 (2013.01); F23N 5/187 (2013.01); F23N 2225/02 (2020.01); F23N 2225/04 (2020.01); F23N 2225/06 (2020.01); F23N 2233/02 (2020.01); F23N 2233/06 (2020.01)
Citation (search report)
- DE 2011717 A1 19701203
- FR 2295353 A1 19760716 - SAUNIER DUVAL [FR]
- US 3042769 A 19620703 - CAMPBELL NED G
- THE STEAM ENGINEER, vol. 26, March 1957, no. 305, London, GB A. LINFORD: "The instrumentation and automatic control of small industrial boiler plants", pages 197-200.
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
DOCDB simple family (application)
EP 80200824 A 19800901; NL 7906945 A 19790918