EP0794385A1 - Sortie de fumées pour la connexion d'une installation de chauffage central à une cheminée ouverte - Google Patents

Sortie de fumées pour la connexion d'une installation de chauffage central à une cheminée ouverte Download PDF

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Publication number
EP0794385A1
EP0794385A1 EP97200663A EP97200663A EP0794385A1 EP 0794385 A1 EP0794385 A1 EP 0794385A1 EP 97200663 A EP97200663 A EP 97200663A EP 97200663 A EP97200663 A EP 97200663A EP 0794385 A1 EP0794385 A1 EP 0794385A1
Authority
EP
European Patent Office
Prior art keywords
stack
pipe
pressure
heating apparatus
connecting pipe
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Withdrawn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
EP97200663A
Other languages
German (de)
English (en)
Inventor
Jacob Joseph Marijnen
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.)
Radson Alutherm NV
Original Assignee
Radson Alutherm NV
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 Radson Alutherm NV filed Critical Radson Alutherm NV
Publication of EP0794385A1 publication Critical patent/EP0794385A1/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Withdrawn legal-status Critical Current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
    • F23L11/00—Arrangements of valves or dampers after the fire
    • F23L11/02—Arrangements of valves or dampers after the fire for reducing draught by admission of air to flues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J11/00—Devices for conducting smoke or fumes, e.g. flues 

Definitions

  • the invention relates to an assembly of a central heating apparatus, a stack and a connecting piece, the heating apparatus being provided with a fan for the forced supply of combustion air, and with a flue gas discharge connection.
  • the connecting piece according to the known proposal is intended for admixing air in the flow of flue gas when the temperature of the flue gases is too low.
  • the object aimed at by admixing this air is the prevention of condensation in the stack.
  • the means for admixing air are either formed by a second air supply fan by means of which additional air is blown under pressure into the flue gas duct, or by a constriction in the flue gas duct so that, through acceleration of the flow rate, a reduced pressure is created in the flue gas duct, whereby ambient air is drawn in.
  • central heating apparatus typically comprises a fan by means of which the combustion air is fed to a burner at a certain excess pressure.
  • this excess pressure there also prevails an excess pressure in the combustion chamber as well as in the subsequent flue gas drafts.
  • the combustion air supply fan present it is very well possible that there also prevails an excess pressure in the flue gas exhaust pipe or stack to which the central heating apparatus is connected.
  • the buildings in which, for heating purposes, the heating apparatus is installed often do not possess a suitable space for installing the heating apparatus in such a manner that, also, a direct flue gas exhaust pipe, to which no other apparatus are connected, can open into the outside air.
  • a heater room in which a former atmospheric heating apparatus to be replaced was installed and where a stack duct connection of such an atmospheric heating apparatus was also located.
  • stack ducts are mostly of the open type, i.e. the stack duct to which the central heating apparatus is to be connected is provided with more than one connecting opening, for connecting the flue gas outlets of, for instance, a sanitary water heater, gas hearth or like gas or oil-fired appliances.
  • the object of this invention is to adapt the assembly of the type mentioned in the opening paragraph so that the stack can be a stack of the open type without entailing the danger of the formation of super-atmospheric pressure in the stack, and hence without involving the danger of flue gases ending up, via the other stack connections, in the building to be heated.
  • the assembly of the invention is characterized in that, for connecting the central heating apparatus to a stack of the open type, the connecting piece comprises a length of inlet pipe which opens, via an opening, into a length of stack connecting pipe, to which stack connecting pipe there is also connected a length of pressure-equalizing pipe which is in open communication with the space in which the heating apparatus is installed, while at the location of the opening where the inlet pipe opens into the stack connecting pipe, a flue gas guide plate is provided which is arranged so that the flue gases are guided into the stack connecting pipe without the flow rate of the flue gases being considerably increased, so that, as a result of the open communication via the pressure-equalizing pipe, the pressure in the stack connecting pipe is equal to, or, resulting from the chimney draft, less than, the pressure prevailing in the space in which the heating apparatus is installed.
  • the pressure prevailing in the stack of the open type is equal to or less than the pressure prevailing in the space in which the central heating apparatus is installed. Since downstream of the stack connecting pipe, the pressure in the stack duct can never be higher than at the location of the stack connecting pipe - after all, at the location of the stack connecting pipe the greatest flow resistance is yet to be overcome -, the pressure in the other parts of the open stack duct is lower than the pressure prevailing in the stack connecting pipe, and, accordingly, lower than the pressure prevailing in the space in which the heating apparatus is installed.
  • the connecting piece forming part of the assembly according to the invention it is effected that the pressure prevailing in the open stack duct is in each case lower than the pressure prevailing in the spaces in which other connecting openings of the stack duct are located. Hence, flue gases present in the stack duct are thus prevented from flowing into the other spaces of the building via the other connecting openings of the stack duct.
  • a heat pump comprising a combustion engine by means of which a compressor of the heat pump is driven.
  • the exhaust gases of the combustion engine are discharged, via a heat exchanger and a stack connecting piece, to a conventional chimney of a building.
  • the present invention addresses an altogether different problem. Hitherto, it has been impossible to connect a modern central heating apparatus, comprising a burner, a heat exchanger and a fan for feeding, under pressure, combustion air to the burner, to a so-called open stack.
  • a modern central heating apparatus comprising a burner, a heat exchanger and a fan for feeding, under pressure, combustion air to the burner, to a so-called open stack.
  • DE-A-31 50 151 provides no clue whatsoever.
  • the drawing shows a schematic side elevation of the assembly of a central heating apparatus 1, a connecting piece 2 and a part of an open stack 3.
  • the central heating apparatus 1 comprises a closed case 4 having a combustion air feed opening 5 and a flue gas discharge opening 6.
  • the heating apparatus 1 comprises a combustion air supply fan 7 which feeds, under pressure, the combustion air supplied via the combustion air feed opening 5 and necessary for the combustion of the fuel, to a burner 8. From the burner 8, the hot flue gases are passed along a heat exchanger 9 to be subsequently discharged to the flue gas discharge opening 6 via an internal flue gas discharge duct 10 included in the closed case 4.
  • such central heating apparatus 1 of the closed type has its combustion air feed opening 5 connected to a combustion air supply pipe, and its flue gas discharge opening 6 to a flue gas discharge pipe that directly opens into the outside air, without any other connecting openings being present in the flue gas discharge pipe.
  • the central heating apparatus 1 is connected to a stack 3 of the open type, i.e. a stack provided with other connecting openings 11 to which other apparatus can be connected, such as for instance a heater or a gas hearth.
  • the assembly comprises a connecting piece 2 of a particular construction, connecting the flue gas discharge opening 6 to the open stack 3.
  • the connecting piece 3 comprises an inlet pipe 12 which, via an opening 13, opens into a stack connecting pipe 14, to which stack connecting pipe 14 there is also connected a pressure-equalizing pipe 15 which is in open communication with the space A in which the heating apparatus 1 is installed.
  • a flue gas guide plate 16 is arranged, disposed so that the flue gases are guided into the stack connecting pipe 14 without involving a considerable increase of the flow rate of the flue gases. It is thus provided that due to the open communication via the pressure-equalizing pipe 15, the pressure in the stack connecting pipe 14 is less than or equal to the pressure prevailing in the space A in which the heating apparatus 1 is installed.
  • the inlet pipe 12 extends perpendicularly to the stack connecting pipe 14.
  • the pressure-equalizing pipe 15 extends in line with the stack connecting pipe 14.
  • the flue gas guide plate 16 is constructed as a substantially L-shaped plate part 16, bent over at right angles and having a first leg 16a attached, on the side of the opening 13 proximal to the pressure-equalizing pipe 15, to the pressure-equalizing pipe 15.
  • a second leg 16b of the L-shaped plate part 16 extends through at least a part of the length of the stack connecting pipe 14.
  • the second leg 16b of the flue gas guide plate 16 is arranged in the stack connecting pipe 14 so that there is no constriction that has to be passed by the flue gases, so that the flue gases hardly, if at all, undergo an acceleration of the flow rate. This prevents the occurrence of a venturi or injector action whereby, due to a considerable decrease of the flow rate, a super-atmospheric pressure could as yet occur in the open stack duct 3.
  • a temperature sensor 17 can be connected in the pressure-equalizing pipe 15, which sensor is connectable to, for instance, a control of the heating apparatus 1.
  • a control of the heating apparatus 1 When, for instance as a result of a stack stoppage, flue gas leaves the connecting piece 2 via the pressure-equalizing pipe 15, this is sensed by the temperature sensor 17.
  • the signal fed by the temperature sensor 17 to the control of the heating apparatus 1 as a result of the increase of temperature can for instance have as a result that the control switches off the heating apparatus directly, so that the chance that more flue gases flow into the space A where the central heating apparatus 1 is installed is precluded.
  • the inlet pipe 12 need not necessarily extend perpendicularly to the stack connecting pipe 14, and the flue gas guide plate part 16 need not necessarily have a straight L-shape.
  • the two legs 16a, 16b may very well be interconnected via a blending transition.
  • the position of the second leg 16b relative to the longitudinal center line of the stack connecting pipe 14 may vary. At any rate, the position should be chosen so that the flue gases do not have to pass a considerable constriction, so that the occurrence of a venturi or injector effect is prevented, which effect could result in an increase of pressure downstream of the constriction.
EP97200663A 1996-03-05 1997-03-05 Sortie de fumées pour la connexion d'une installation de chauffage central à une cheminée ouverte Withdrawn EP0794385A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1002536A NL1002536C2 (nl) 1996-03-05 1996-03-05 Uitlaatstuk ten behoeve van aansluiting van een centraal-verwarmings- toestel op een open schoorsteen.
NL1002536 1996-03-05

Publications (1)

Publication Number Publication Date
EP0794385A1 true EP0794385A1 (fr) 1997-09-10

Family

ID=19762447

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97200663A Withdrawn EP0794385A1 (fr) 1996-03-05 1997-03-05 Sortie de fumées pour la connexion d'une installation de chauffage central à une cheminée ouverte

Country Status (2)

Country Link
EP (1) EP0794385A1 (fr)
NL (1) NL1002536C2 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060345A2 (fr) * 1981-03-17 1982-09-22 Buderus Aktiengesellschaft Dispositif dans le conduit de fumée des chaudières de chauffage à huile ou à gaz
DE3150151A1 (de) * 1981-12-18 1983-06-30 Fichtel & Sachs Ag, 8720 Schweinfurt Waermepumpen-heizungsanlage
FR2550318A1 (fr) * 1983-08-04 1985-02-08 Gaz De France Chaudiere a gaz a condensation raccordee a une installation de ventilation mecanique controlee et a debit de refoulement controle

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0060345A2 (fr) * 1981-03-17 1982-09-22 Buderus Aktiengesellschaft Dispositif dans le conduit de fumée des chaudières de chauffage à huile ou à gaz
DE3150151A1 (de) * 1981-12-18 1983-06-30 Fichtel & Sachs Ag, 8720 Schweinfurt Waermepumpen-heizungsanlage
FR2550318A1 (fr) * 1983-08-04 1985-02-08 Gaz De France Chaudiere a gaz a condensation raccordee a une installation de ventilation mecanique controlee et a debit de refoulement controle

Also Published As

Publication number Publication date
NL1002536C2 (nl) 1997-09-08

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