FR2519118A2 - Gas extractor fresh air intake device for gas heater - uses pressure temp. transducers to control vane which directs flow between gas extraction and air intake - Google Patents

Gas extractor fresh air intake device for gas heater - uses pressure temp. transducers to control vane which directs flow between gas extraction and air intake Download PDF

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Publication number
FR2519118A2
FR2519118A2 FR8124368A FR8124368A FR2519118A2 FR 2519118 A2 FR2519118 A2 FR 2519118A2 FR 8124368 A FR8124368 A FR 8124368A FR 8124368 A FR8124368 A FR 8124368A FR 2519118 A2 FR2519118 A2 FR 2519118A2
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FR
France
Prior art keywords
tube
sensors
air
gas
air intake
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.)
Granted
Application number
FR8124368A
Other languages
French (fr)
Other versions
FR2519118B2 (en
Inventor
Michel Zveguintzoff
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.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval Eau Chaude Chauffage SDECC SA
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
Priority claimed from FR7907117A external-priority patent/FR2452059A1/en
Application filed by Saunier Duval Eau Chaude Chauffage SDECC SA filed Critical Saunier Duval Eau Chaude Chauffage SDECC SA
Priority to FR8124368A priority Critical patent/FR2519118A2/en
Publication of FR2519118A2 publication Critical patent/FR2519118A2/en
Application granted granted Critical
Publication of FR2519118B2 publication Critical patent/FR2519118B2/fr
Granted legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • 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

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Combustion (AREA)

Abstract

The burnt gas extractor/fresh air admission device comprises a gas evacuation hood with an offset vertical chimney on which is mounted a distribution box of parallelepipedic shape having an air inlet in its lower face. A pressure transducer mounted near the air inlet monitors the flow rate and two transducers (23) made from silica resistances or positive temperature coefficient resistances are placed in the air tube (22). The transducers are mounted on a printed circuit board mounted in guides so as to be readily removable. The printed circuit has a central hole through which air passes. The transducers are used to control a vane (3) which directs the flow, driven by a fan (5), to either extract gases or draw in fresh air.

Description

L'invention concerne un dispositif d'évacuation des gaz brûles et d'admission d'air frais pour appareils étanches a gaz utilisant un boTtier répartiteur d'air muni d'orifices pour le passage de l'air de combustion en direction des brûleurs.The invention relates to a device for evacuating burnt gases and for admitting fresh air for gas-tight devices using an air distributor box provided with orifices for the passage of combustion air towards the burners.

Le dispositif d'évacuation conformément au brevet principal est essentiellement constitué d'une hotte ayant un profil en forme de L, d'une chambre collectride, disposée immédiatement au-dessus du corps de chauffe de l'appareil dont le couvercle supérieur est faiblement incline sur l'horizontale, d'une cheminée verticale d'évacuation surmontant ledit couvercle, et d'un boltier répartiteur d'air disposé a plat a la partie supérieure de la cheminée.Sur une paroi verticale de la cheminée est monté le ventilateur d'extraction et son moteur d'entrainement a axe horizontal, coiffant un orifice prévu sur la cheminée, et dont la tubulure de sortie traverse le bottier répartiteur d'air pour s'emmancher sur le conduit intérieur du coude orientable d'évacuation des gaz brûlés, le ventilateur étant ainsi avantageusement logé dans l'espace creux entre le couvercle de la chambre collectrice, la cheminee et le répartiteur d'air,son axe étant horizontal ce qui améliore sa longévité. Des orifices sont prévus sur la paroi inférieure du bottier répartiteur d'air pour le passage de l'air de combustion en direction des brûleurs,- extérieurement a la hotte. Sur ces orifices sont en outre rapportés des petits tubes de prise d'air notamment pour la surveillance du débit.The evacuation device according to the main patent consists essentially of a hood having an L-shaped profile, of a collectride chamber, disposed immediately above the heating body of the apparatus, the upper cover of which is slightly inclined on the horizontal, a vertical exhaust chimney surmounting said cover, and a boltier air distributor arranged flat at the top of the chimney.On a vertical wall of the chimney is mounted the fan extraction and its drive motor with horizontal axis, covering an orifice provided on the chimney, and the outlet tube of which passes through the air distributor casing to be fitted onto the inner duct of the orientable elbow for evacuating the burnt gases, the fan thus advantageously being housed in the hollow space between the cover of the collecting chamber, the chimney and the air distributor, its axis being horizontal which improves its longevity. Holes are provided on the lower wall of the air distributor housing for the passage of combustion air towards the burners, - outside the hood. On these orifices are also reported small air intake tubes, in particular for monitoring the flow rate.

Selon l'invention la mesure du débit d'air traversant ces orifices est assuree par deux capteurs, connus en soi, constitués de résistances au silicium ou de thermistances a coefficient de température positif, disposes à l'intérieur du tube de prise d'air et a proximité de son embouchure vers la chambre étanche, le tube ayant pour objet de guider la veine d'air de façon homogène' pour assurer la détection de façon plus précise.According to the invention, the measurement of the air flow rate passing through these orifices is provided by two sensors, known per se, consisting of silicon resistors or thermistors with a positive temperature coefficient, arranged inside the air intake tube. and near its mouth towards the sealed chamber, the tube having the object of guiding the air stream in a homogeneous way to ensure detection more precisely.

D'autres caractéristiques et avantages de l'invention apparaftront à la lecture de la description qui va suivre d'une forme de réalisation en référence aux dessins annexés qui représentent - figure 1 : une vue en perspective de la hotte d'évacuation.Other characteristics and advantages of the invention will become apparent on reading the description which follows of an embodiment with reference to the appended drawings which represent - FIG. 1: a perspective view of the exhaust hood.

- figure 2 : une variante de réalisation du montage des capteurs,
vue en coupe à plus grande échelle.- Figure 2: an alternative embodiment of the mounting of the sensors,
sectional view on a larger scale.

Cette hotte coiffe le bloc à ailettep non représenté qui constitue le corps de chauffe de l'appareil. Elle présente un profil en forme de L dont la partie inférieure de forme rectangulaire, fixée au bloc'à ailettes, forme la chambre collectrice 10 dont le couvercle supérieur 11 est faiblement incline sur l'horizontale.This hood covers the not shown fin block which constitutes the heating body of the device. It has an L-shaped profile, the lower rectangular part of which is fixed to the fin block, forms the collecting chamber 10, the upper cover 11 of which is slightly inclined to the horizontal.

Une cheminée verticale d'évacuation 12 prolonge vers le haut ladite chambre collectrice . Sur le sommet de la hotte est fixé un bottier répartiteur d'air 15 de forme parallélépipédique et d'épaisseur réduite qwS,en plus, a une surface équivalente à la surface de base de la hotte. La face supérieure de ce bottier est percee d'un orifice 16 pour l'évacuation des gaz brûlés et l'admission d'air frais. Cet orifice est coiffé d'un coude de raccordement orientable 3, connu en soi, dont le conduit interieur 4 de plus petit diametre traverse de façon étanche tout le bottier 15 pour s'emmancher sur le tube de sortie du ventilateur d'extraction 5.Par contre le conduit extérieur du coude orientable couvre la totalité de l'orifice 16 pour que l'air frais admis par l'espace annulaire compris entre les deux conduits coaxiaux pénètre dans le boiter répartiteur 15.A vertical exhaust chimney 12 extends upwards said collecting chamber. On the top of the hood is fixed an air distributor casing 15 of parallelepiped shape and reduced thickness qwS, in addition, has an area equivalent to the base surface of the hood. The upper face of this case is pierced with an orifice 16 for the evacuation of the burnt gases and the admission of fresh air. This orifice is capped with an orientable connection elbow 3, known per se, whose inner duct 4 of smaller diameter passes through the entire casing 15 in leaktight manner to be fitted onto the outlet tube of the exhaust fan 5. On the other hand, the external duct of the orientable elbow covers the whole of the orifice 16 so that the fresh air admitted by the annular space comprised between the two coaxial ducts enters the distribution box 15.

Le ventilateur d'extraction 5 est fixé a la paroi latérale de la cheminée 12 au--dessus de l'orifice 13. Le moteur 7 d'entrainement de la turbine dudit ventilateur est lui-même monté sur le capot du ventilateur d'extraction 5. Il occupe ainsi l'espace creux disponible entre le couvercle 11 de la chambre collectrice 10, la cheminee 12 et le boitier répartiteur d'air 15. Il est à axe horizontal ce gui le rend aisément accessible et démontable et lui garantit un bon fonctionnement. t'ensemble précédemment décrit, que constitue la hotte et le bottier répartiteur d'air, est fixé au dossier 9 de l'appareil contre lequel est destine à s'appliquer de façon etanche le capot extérieur 20. The exhaust fan 5 is fixed to the side wall of the chimney 12 above the orifice 13. The motor 7 for driving the turbine of said fan is itself mounted on the hood of the exhaust fan 5. It thus occupies the hollow space available between the cover 11 of the collecting chamber 10, the chimney 12 and the air distribution box 15. It is on a horizontal axis, this mistletoe makes it easily accessible and removable and guarantees it good operation. the assembly described above, which constitutes the hood and the air distributor, is fixed to the backrest 9 of the device against which is intended to be applied in a sealed manner to the outer cover 20.

Au moins un orifice de passage d'air 17 est prevu sur la paroi inferieure du boftier 15 pour le passage de l'air de combustion en direction des brûleurs extérieurement a la hotte 1. Un tube d'air 22 est rapporté sur cet orifice 17 ; il a pour objet de guider de façon homogène la veine drair pour permettre la surveillance du débit de façon correcte. A cet effet il porte deux capteurs 23 constitues de thermistances a coefficient de température positif, qui sont disposés l'un en face de l'autre a l'embouchure du tube. Ces capteurs sont fixes sur un circuit imprimé 24 monté sur des glissières ou supports analogues, de façon à être aisément accessible et démontable. Ce circuit imprimé est évidemment percé d'un orifice central découpe sur lequel dépassent les capteurs, cet orifice venant coTncider avec la section interne du tube 22.At least one air passage orifice 17 is provided on the lower wall of the box 15 for the passage of the combustion air towards the burners outside the hood 1. An air tube 22 is attached to this orifice 17 ; its purpose is to guide the prairie vein evenly to allow correct flow monitoring. To this end, it carries two sensors 23 made up of thermistors with a positive temperature coefficient, which are arranged one opposite the other at the mouth of the tube. These sensors are fixed on a printed circuit 24 mounted on slides or similar supports, so as to be easily accessible and removable. This printed circuit is obviously pierced with a central cut-out orifice on which the sensors protrude, this orifice coming to coincide with the internal section of the tube 22.

Selon une variante de réalisation montrée à la figure 2, le conduit 22 se présente sous la forme d'un venturi constitue de deux parties assemblées par un jeu de vis 25. La partie supérieure 26 a profil convergent est fixee a l'orifice 17 du boftier répartiteur d'air 15, tandis que la partie inférieure divergente 27 débouche à l'extérieur de la hotte. La plaquette 24 qui porte les deux capteurs 23 est "pincée" entre ces deux parties 26 et 27 de telle sorte que les capteurs se trouvent au niveau du col du venturi, c'est-à-dire dans une zone où la vitesse de l'air est plus grande ce qui augmente donc leur sensibilite. According to an alternative embodiment shown in Figure 2, the conduit 22 is in the form of a venturi consists of two parts assembled by a set of screws 25. The upper part 26 with a converging profile is fixed to the orifice 17 of the boftier air distributor 15, while the divergent lower part 27 opens to the outside of the hood. The plate 24 which carries the two sensors 23 is "pinched" between these two parts 26 and 27 so that the sensors are located at the neck of the venturi, that is to say in an area where the speed of the the air is larger which increases their sensitivity.

Claims (4)

RevendicationsClaims 1. Dispositif d'évacuation des gaz brûlés et d'admission d'air1. Device for evacuating burnt gases and air intake frais pour appareils de chauffage étanches a gaz comportant charges for gas tight heaters with une hotte d'évacuation des gaz brplés à cheminee verticale an exhaust hood for burned gases with a vertical chimney décentrée sur laquelle est rapporté un bottier répartiteur off-center to which a distributor boot is attached de forme parallélépipédique et d'épaisseur réduite muni sur of parallelepiped shape and reduced thickness provided on sa paroi inférieure d'au moins un orifice de passage d'air its bottom wall of at least one air passage orifice conformément aux revendications 1 et 3 du brevet principal, according to claims 1 and 3 of the main patent, orifice sur lequel peut être rapporte un petit tube de prise orifice to which a small intake tube can be attached de pression d'air notamment pour la surveillance du debit  air pressure, in particular for flow monitoring caractérisé par le fait que deux capteurs (23) connus en soi characterized in that two sensors (23) known per se constitués pgr des résistances au silicium ou des thermis made up of silicon resistances or thermis tances à coefficient de température positif sont disposés tances with positive temperature coefficient are arranged à l'intérieur du tube d'air (22) et à proximité de son embou-  inside the air tube (22) and close to its nozzle chure vers la chambre étanche pour detecter la veine d'air to the sealed chamber to detect the air stream guidée de façon homogene dans ledit tube. homogeneously guided in said tube. 2. Dispositif selon la revendication 1 caractérisé par le fait2. Device according to claim 1 characterized by the fact que les capteurs (23) sont fixés sur un circuit imprimé possé that the sensors (23) are fixed on a printed circuit poss dant un orifice découpé sur lequel dépassent les capteurs, in a cut out hole on which the sensors protrude, orifice que l'on fait coTncider avec la section interne du orifice which is made to coincide with the internal section of the tube 22. tube 22. 3. Dispositif selon les revendications 1 et 2 caracterisé par3. Device according to claims 1 and 2 characterized by le fait que le circuit imprimé (24) portant les capteurs (23) the fact that the printed circuit (24) carrying the sensors (23) est monté sur un tube (22) ayant la forme d'un venturi pour is mounted on a tube (22) having the shape of a venturi for que ces capteurs se trouvent dans le tube au niveau du col that these sensors are in the tube at the neck du venturi. venturi. 4. Dispositif selon la revendication 3 caractérisé par le fait4. Device according to claim 3 characterized in that que le tube (22) en forme de venturi est formé par l'assem that the venturi-shaped tube (22) is formed by the assembly blage d'une partie supérieure (26) à profil. convergent blocking of an upper part (26) in profile. converge et d'une partie (27) à profil divergent entre lesquelles and of a part (27) with divergent profile between which se trouve *pince " le circuit imprimé (24) portant les is * clamp "the printed circuit (24) carrying the capteurs (23).  sensors (23).
FR8124368A 1979-03-21 1981-12-29 Gas extractor fresh air intake device for gas heater - uses pressure temp. transducers to control vane which directs flow between gas extraction and air intake Granted FR2519118A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR8124368A FR2519118A2 (en) 1979-03-21 1981-12-29 Gas extractor fresh air intake device for gas heater - uses pressure temp. transducers to control vane which directs flow between gas extraction and air intake

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7907117A FR2452059A1 (en) 1979-03-21 1979-03-21 DEVICE FOR EXHAUSTING BURNED GASES AND FOR SUPPLYING FRESH AIR FOR GAS WATERTIGHT APPLIANCES
FR8124368A FR2519118A2 (en) 1979-03-21 1981-12-29 Gas extractor fresh air intake device for gas heater - uses pressure temp. transducers to control vane which directs flow between gas extraction and air intake

Publications (2)

Publication Number Publication Date
FR2519118A2 true FR2519118A2 (en) 1983-07-01
FR2519118B2 FR2519118B2 (en) 1984-04-06

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FR8124368A Granted FR2519118A2 (en) 1979-03-21 1981-12-29 Gas extractor fresh air intake device for gas heater - uses pressure temp. transducers to control vane which directs flow between gas extraction and air intake

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354649A2 (en) * 1988-08-11 1990-02-14 General Motors Corporation Close-coupled mass airflow meter and throttle plate assembly
CN109764922A (en) * 2018-12-27 2019-05-17 苏州化工仪表有限公司 A kind of thermal type gas quality flow meter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074566A (en) * 1975-11-01 1978-02-21 Nippon Soken, Inc. Intake air amount detecting device for an internal combustion engine
FR2417923A7 (en) * 1978-02-17 1979-09-14 Vaillant Sarl FUEL SOURCE OF HEAT
FR2452059A1 (en) * 1979-03-21 1980-10-17 Saunier Duval DEVICE FOR EXHAUSTING BURNED GASES AND FOR SUPPLYING FRESH AIR FOR GAS WATERTIGHT APPLIANCES
DE3044553A1 (en) * 1979-11-27 1981-07-02 Hitachi, Ltd., Tokyo AIR INLET DEVICE FOR AN INTERNAL COMBUSTION ENGINE

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4074566A (en) * 1975-11-01 1978-02-21 Nippon Soken, Inc. Intake air amount detecting device for an internal combustion engine
FR2417923A7 (en) * 1978-02-17 1979-09-14 Vaillant Sarl FUEL SOURCE OF HEAT
FR2452059A1 (en) * 1979-03-21 1980-10-17 Saunier Duval DEVICE FOR EXHAUSTING BURNED GASES AND FOR SUPPLYING FRESH AIR FOR GAS WATERTIGHT APPLIANCES
DE3044553A1 (en) * 1979-11-27 1981-07-02 Hitachi, Ltd., Tokyo AIR INLET DEVICE FOR AN INTERNAL COMBUSTION ENGINE

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0354649A2 (en) * 1988-08-11 1990-02-14 General Motors Corporation Close-coupled mass airflow meter and throttle plate assembly
EP0354649A3 (en) * 1988-08-11 1991-12-18 General Motors Corporation Close-coupled mass airflow meter and throttle plate assembly
CN109764922A (en) * 2018-12-27 2019-05-17 苏州化工仪表有限公司 A kind of thermal type gas quality flow meter

Also Published As

Publication number Publication date
FR2519118B2 (en) 1984-04-06

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