EP0418976A1 - Cheminée - Google Patents

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Publication number
EP0418976A1
EP0418976A1 EP90202475A EP90202475A EP0418976A1 EP 0418976 A1 EP0418976 A1 EP 0418976A1 EP 90202475 A EP90202475 A EP 90202475A EP 90202475 A EP90202475 A EP 90202475A EP 0418976 A1 EP0418976 A1 EP 0418976A1
Authority
EP
European Patent Office
Prior art keywords
shaft
discharge
section
supply shaft
supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP90202475A
Other languages
German (de)
English (en)
Inventor
Robert Charles Lauret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ubbink Nederland BV
Original Assignee
Ubbink Nederland BV
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ubbink Nederland BV filed Critical Ubbink Nederland BV
Publication of EP0418976A1 publication Critical patent/EP0418976A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/02—Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/04—Balanced-flue arrangements, i.e. devices which combine air inlet to combustion unit with smoke outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/001—Details arrangements for discharging combustion gases
    • F24C15/002—Details arrangements for discharging combustion gases for stoves of the closed type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J2211/00—Flue gas duct systems
    • F23J2211/10—Balanced flues (combining air supply and flue gas exhaust)

Definitions

  • the invention relates to a chimney, comprising a supply shaft with an entrance for ambient air and a discharge shaft with an exit for waste gases, the supply shaft projecting through a wall and de­bouching in an appliance with a blower which discharges towards the discharge shaft also projecting through the wall, said wall being either the roof or a wall of a building.
  • the invented chimney has been developed for use with closed appli­ances with a gas burner and a fan for discharging the waste gases, i.e. the combustion gases, from the closed appliance and to force them through the discharge shaft towards the ambient air, while fresh air and therefore oxygen flows through the supply shaft to­wards the gas burner.
  • the invented chimney is also applicable in systems for the ventilation of chambers, in which contaminated air is exhausted from the chamber by a fan, while fresh air flows through the supply shaft towards the chamber to be ventilated.
  • a disadvantage of the known chimneys is that, due to changes in the force and direction of the wind and due to varying thermal draught, the discharge through the discharge shaft and the supply through the supply shaft are not constant, and this affects either the operation of a gas burner in a closed gas appliance, or the ventilation of closed chamber so that this operation does not always take place to the desired extent.
  • the invented chimney is preferably characterized in that the jet nozzle is a shaft portion that converges towards the pressure equalization chamber.
  • the distance between the exit of the jet nozzle and the entrance of the second­ary discharge shaft inside the pressure equalization chamber is such that the discharge from the primary discharge shaft remains volumetrically more equalized in spite of the varying influence of wind on the secondary supply shaft and on the secondary discharge shaft.
  • a secondary supply shaft 1 extends from its entrance member 2, which is in communication with ambient air, to a pressure equaliz­ation chamber 3 from which a primary supply shaft 4 extends to a closed gas appliance (not drawn) or chamber to be ventilated so as to supply it with fresh air.
  • a fan (not drawn) exhausts waste gases from the closed gas appli­ance or the chamber to be ventilated and forces these gases through a primary discharge shaft 5 towards a jet nozzle 6.
  • the jet nozzle 6 has e.g. a truncated, conical constriction to­wards the pressure equalization chamber 3, resulting in that the thrust is partially converted there into flow rate, resulting in that the total flow rate in the jet nozzle is raised.
  • the jet nozzle 6 debouches into the pressure equalization chamber 3 at such a distance from the entrance of a secondary discharge shaft 7 that the circulation of gases from the pressure equaliz­ation chamber 3 and through the primary supply shaft 4, onwards through the gas appliance (not drawn) or the chamber to be ven­tilated (not drawn), both fitted with a fan, via the primary dis­charge shaft with jet nozzle 6 up to again inside the pressure equalization chamber 3 remains equalized, in spite of changes in the air flow through the secondary supply shaft 1 towards the pressure equalization chamber and changes in the flow of gases from the pressure equalization chamber 3 at least substantially through the secondary discharge shaft 7 to the ambient air.
  • the invention provides a secondary and a primary cir­cuit, separated from one another by the pressure equalization chamber 3 and the jet nozzle 6. Furthermore the circulation through the primary supply shaft 4, the closed gas appliance or the chamber to be ventilated, the primary discharge shaft 5 and the jet nozzle 6 are increasingly determined by the operation of the fan pertaining to the closed gas appliance or to the chamber to be ventilated and therefore to a lesser extent by the influence of the wind.
  • the secondary supply shaft 1 and the secondary discharge shaft 7 are juxtaposed, in an­other embodiment according to fig. 2 the secondary discharge shaft 7 can be disposed coaxially within the secondary supply shaft 1.
  • An advantage of the latter embodiment is heat transfer from the secondary discharge shaft 7 heated by combustion gases to the air flowing inwards through the secondary supply shaft.
  • Optimum circulation necessitates the feature that in the embodi­ment according to fig. 1 the free cross-section of the secondary supply shaft 1 is virtually equal to the free cross-section of the primary supply shaft 4. Furthermore for optimum circulation it is desireable that the free cross-section of the secondary discharge shaft 7 is virtually equal to the free cross-section of the primary discharge shaft 5. Moreover it is desireable for optimum operation that the free cross-section of the primary discharge shaft 5 is at least virtually equal to the free cross-section of the primary supply shaft 4.
  • jet nozzle 6 An additional advantage of the jet nozzle 6 is that its truncated, conical exterior 8 faces with its narrow end the entrance of the secondary discharge shaft 7. As a result, liquid condensed from the hot waste gases on the cooler wall of the secondary discharge shaft 7 will drip onto the conical outer wall 8 of the jet nozzle 6 and therefore it will not end up, through the primary discharge shaft 5 into the fan (not drawn) of the closed gas appliance (not drawn) or the chamber to be ventilated (also not drawn).
  • the separation into a secondary supply shaft 1 and a primary supply shaft 4 also yields the advantage that liquid that has possibly entered the secondary supply shaft 1 from the ambient air will not inevitably end up in the primary supply shaft 4. This implies that said liquid will not end up in the chamber to be ven­tilated (not drawn) or the closed gas applicance (not drawn). This favourable effect is enhanced in that the primary supply shaft 4 projects beyond the bottom of the pressure equalization chamber 3.
  • the pressure equalization chamber 3 comprises a discharge channel 9 for discharging the liquid collected in the pressure equalization chamber.
  • a nozzle 10 conically expanding from the secondary discharge shaft 7, is disposed at the exit of the secondary discharge shaft. After all, the flow rate of the waste gases flowing through the secondary discharge shaft will be partially converted into thrust in the nozzle 10 on account of its conical shape, thus decreasing the influence of wind on the outflow of waste gases to the ambient air.
  • an entrance member 2 conically converging towards the secondary supply shaft 1 is dis­posed at the entrance of the secondary supply shaft. After all, on account of said conical shape of the nozzle, the pressure of the wind will be partially converted into speed with which the air will be flowing faster through the supply shaft 1.
  • partitions 11, 12 and 13 In order to prevent the inflow of rain water and snow and also to counteract that waste gases would mix with air flowing towards the secondary supply shaft 1, partitions 11, 12 and 13 according to figure 1 have been used, these partitions being a part of the sys­tem as extensively described in Dutch patent application 87 03097 of the present Applicant. Therefore said publication is referred to for further details and it is merely stated here that preferively two partitions 14 and 15, perpendicular to one another, are disposed above the entrance of the entrance member 2 in order to guide the wind more equally into said entrance. Partition 14 is disposed in the plane of the drawing and partition 15 is disposed perpendicularly thereto.
  • the entrance member 2 receives air that flows between the parti­tions 11 and 12, whereas the nozzle 10 extends closed between the partitions 11 and 12 so as to avoid that waste gases end up in the entrance member 2.
  • the waste gases flow through nozzle 10 up to between the partitions 12 and 13, and are blown away from that space.
  • Partition 13 serves to prevent rain and snow from reaching nozzle 10.
  • the nozzle 10 on the secondary discharge shaft 7 extends coaxially through a hood having a cap 21 and a sleeve 16 and being mounted on the second­ary supply shaft 1.
  • a partition 17 seals the sleeve 16 against the nozzle 10 so that waste gases from nozzle 10 can only flow out through openings in the sleeve without contaminating the air flow­ing into the supply shaft 1.
  • radial guiding partitions 20 each extend from sleeve 16 to­wards the nozzle 10 and provide a more equalized influence of wind during the supply of air towards the supply shaft 1.
  • the secondary supply shaft 1 and the secondary discharge shaft 7 extend through a wall (not drawn), such as a roof or the wall of a building accommodating closed gas appliances and/or chambers to be ventilated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Jet Pumps And Other Pumps (AREA)
EP90202475A 1989-09-21 1990-09-19 Cheminée Withdrawn EP0418976A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8902362 1989-09-21
NL8902362A NL8902362A (nl) 1989-09-21 1989-09-21 Schoorsteen.

Publications (1)

Publication Number Publication Date
EP0418976A1 true EP0418976A1 (fr) 1991-03-27

Family

ID=19855339

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90202475A Withdrawn EP0418976A1 (fr) 1989-09-21 1990-09-19 Cheminée

Country Status (2)

Country Link
EP (1) EP0418976A1 (fr)
NL (1) NL8902362A (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685689A1 (fr) * 1994-06-03 1995-12-06 Muelink & Grol B.V. Dispositif combiné d'admission d'air et d'échappement de fumées pour appareils de combustion étanches
NL9500223A (nl) * 1995-02-07 1996-09-02 Gastec Nv Systeem voor luchttoevoer en rookgasafvoer voor verbrandingstoestellen.
NL9500191A (nl) * 1995-02-02 1996-09-02 Fasto Nefit Bv Element voor het koppelen van een verbrandingsinrichting met een luchttoevoerkanaal en een rookgasafvoerkanaal, en verbrandingsinrichting voorzien van een dergelijk koppelelement.
NL1001070C2 (nl) * 1995-08-25 1997-02-27 Gastec Nv Trekonderbreker- en injectieinrichting.
EP0809074A1 (fr) 1996-05-24 1997-11-26 Ubbink B.V. Structure d'evacuation sans formation de givre
NL1017351C2 (nl) * 2001-02-13 2002-08-14 Ubbink Nederland Bv Dakdoorvoersysteem.
WO2002075215A1 (fr) * 2001-03-20 2002-09-26 Schiedel Gmbh & Co. Tete de cheminee

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB958645A (en) * 1962-07-06 1964-05-21 Webasto Werk Baier Kg W Improvements in and relating to means for discharging the exhaust from air heaters
NL8701374A (nl) * 1987-06-12 1989-01-02 Dru Bv Verwarmingssysteem voorzien van een gesloten verwarmingsinrichting met gebalanceerde thermische trek en een mechanische aanvoer van verbrandingslucht en een afvoer van rookgassen.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB958645A (en) * 1962-07-06 1964-05-21 Webasto Werk Baier Kg W Improvements in and relating to means for discharging the exhaust from air heaters
NL8701374A (nl) * 1987-06-12 1989-01-02 Dru Bv Verwarmingssysteem voorzien van een gesloten verwarmingsinrichting met gebalanceerde thermische trek en een mechanische aanvoer van verbrandingslucht en een afvoer van rookgassen.

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0685689A1 (fr) * 1994-06-03 1995-12-06 Muelink & Grol B.V. Dispositif combiné d'admission d'air et d'échappement de fumées pour appareils de combustion étanches
NL9400908A (nl) * 1994-06-03 1996-01-02 Muelink & Grol Bv Systeem van luchttoevoerkanaal en verbrandingsluchtafvoerkanaal in combinatie met een verbrandingshaard van het in hoofdzaak gesloten type.
NL9500191A (nl) * 1995-02-02 1996-09-02 Fasto Nefit Bv Element voor het koppelen van een verbrandingsinrichting met een luchttoevoerkanaal en een rookgasafvoerkanaal, en verbrandingsinrichting voorzien van een dergelijk koppelelement.
NL9500223A (nl) * 1995-02-07 1996-09-02 Gastec Nv Systeem voor luchttoevoer en rookgasafvoer voor verbrandingstoestellen.
NL1001070C2 (nl) * 1995-08-25 1997-02-27 Gastec Nv Trekonderbreker- en injectieinrichting.
EP0764816A1 (fr) * 1995-08-25 1997-03-26 Gastec N.V. Dispositif pour limiter le tirage et injecteur de fumées
EP0809074A1 (fr) 1996-05-24 1997-11-26 Ubbink B.V. Structure d'evacuation sans formation de givre
NL1017351C2 (nl) * 2001-02-13 2002-08-14 Ubbink Nederland Bv Dakdoorvoersysteem.
EP1469136A1 (fr) * 2001-02-13 2004-10-20 Ubbink B.V. Système de traversée de toit
WO2002075215A1 (fr) * 2001-03-20 2002-09-26 Schiedel Gmbh & Co. Tete de cheminee
CZ300694B6 (cs) * 2001-03-20 2009-07-22 Schiedel Gmbh & Co. Komínová hlava
HRP20030245B1 (en) * 2001-03-20 2011-10-31 Schiedel Gmbh & Co. Chimney stack

Also Published As

Publication number Publication date
NL8902362A (nl) 1991-04-16

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