EP2138767B1 - Compact silencer for a condensation boiler - Google Patents

Compact silencer for a condensation boiler Download PDF

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Publication number
EP2138767B1
EP2138767B1 EP09162557.4A EP09162557A EP2138767B1 EP 2138767 B1 EP2138767 B1 EP 2138767B1 EP 09162557 A EP09162557 A EP 09162557A EP 2138767 B1 EP2138767 B1 EP 2138767B1
Authority
EP
European Patent Office
Prior art keywords
wall
silencer
baffle
aperture
conduit
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.)
Active
Application number
EP09162557.4A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2138767A2 (en
EP2138767A3 (en
Inventor
Lamberto Del Grosso
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.)
Baxi SpA
Original Assignee
Baxi SpA
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 Baxi SpA filed Critical Baxi SpA
Priority to PL09162557T priority Critical patent/PL2138767T3/pl
Priority to SI200931749T priority patent/SI2138767T1/sl
Publication of EP2138767A2 publication Critical patent/EP2138767A2/en
Publication of EP2138767A3 publication Critical patent/EP2138767A3/en
Application granted granted Critical
Publication of EP2138767B1 publication Critical patent/EP2138767B1/en
Priority to HRP20171646TT priority patent/HRP20171646T1/hr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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 GENERALĀ ; 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
    • F23L5/00—Blast-producing apparatus before the fire
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
    • F04D29/663—Sound attenuation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46—Details, e.g. noise reduction means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23D—BURNERS
    • F23D2210/00—Noise abatement

Definitions

  • the present invention relates to a silencer for a wall-mounted gas-fired condensation boiler in accordance with the introduction to the main claim.
  • a boiler of the stated type is known to comprise a burner which receives a mixture of gas and air through a conduit connected to a fan. This latter is operationally associated with a mixer member receiving the gas and the combustion air.
  • boiler manufacturers are faced with two apparently opposing requirements, i.e. to provide boilers of very low thermal power during heating but of high thermal power during hot water production. These requirements result in the construction of boilers with a high modulation range: currently a condensation boiler has a modulation range from 8 kW to 24 kW or from 10 to 28 kW, whereas the objective is to guarantee a variation from 2 kW to 24 kW or from 3 kW to 28 kW.
  • condensation boilers are becoming increasingly more important.
  • improving efficiency in small-dimension boilers intended for domestic heating by increasing the boiler power density results in "sound" problems linked to the generation of low frequency vibration or high frequency hissing. These problems derive from fluctuations in the pressure of the fuel/air mixture within the burner and variations in the flow of combustion air or of the air/fuel mixture through the conduits and members connected to the burner or combustion chamber.
  • silencers where the combustion air enters towards the mixer member.
  • known silencers present various complex geometries which are bulky and negatively affect the overall boiler dimensions, which cannot be reduced to enable it to occupy a dedicated space within a kitchen or compartment provided to contain it.
  • DE 10202702 which forms the basis for the preamble of the main claim, describes a heating device which comprises a housing into which an air inlet line and an exhaust gas outline open.
  • a fuel/air mixture branch preferably provided with a fuel fitting, is joined to the air inlet line.
  • the air inlet line is provided on its inlet side with a tubular extension and has a wedge-shaped section at least partly filled with sound-absorbing or sound-damping material and having a tapered end oriented in the flow direction of the air inlet line.
  • the wedge-shaped section has at least one region of more or less constant cross-section which is partly filled with sound-absorbing material.
  • FR 2043926 relates to a rotary pump mainly of the vortex type, mainly to use the fan to move the air or other gaseous medium.
  • the pump comprises a rotor consisting of an impeller or the like rotating within an annular duct which is incompletely filled, so as to promote the swirling motion of the air.
  • the pump also comprises a silencer interposed between the inlet ducts and the outlet and rotor.
  • GB1589007 relates to a boiler with a burner with combustion air fan for liquid or gaseous fuels with at least one combustion chamber gate, whose gate plate is formed as a base plate for the burner and has a protective plate spaced therefrom on the side of the combustion chamber, the free space thus created serving as a supply means for combustion air; the free space between the gate plate and the protective plate is formed as a spiral blower casing with a fan blower provided therein.
  • a part of the free space may advantageously be formed as a spiral casing, the chambers formed by such subdivision of the free space having a common connection for the flow of air.
  • EP 0126221 (A2 ) relates to a forced-draught burner which consists of a rotor housing having an air intake opening for the motor-driven compressor and an air blow-out opening in the vicinity of the housing for the combustion jet. On the intake side, there is arranged before the rotor housing an intake housing in whose lateral enclosing wall is located the outer intake opening. Within the intake housing, a flow guide web extends approximately in the form of a spiral from the outer intake opening to the inner intake opening.
  • An object of the present invention is to provide a silencer which is highly efficient but of reduced dimensions compared with known silencers, to enable it to be used within boilers of small dimensions (for example 700 mm height x 390 mm width x 290 mm depth).
  • Another object is to provide a silencer of the stated type which is of simple construction and easy to mount within a condensation boiler.
  • Figure 1 shows a condensation boiler 1 comprising an outer casing 2 containing a burner 3 which receives a mixture of air and gas via a mixing conduit 4. This is connected to a fan 5 itself connected to a mixer member 6 of known type, connected to a gas conduit 7. The mixer member 6 is connected to a silencer 9 to which atmospheric air flows.
  • the silencer 9 comprises a box body 12 having perimetral side walls 16 and 17, an upper wall 18, a lower wall 19 and an end wall 20 (all with reference to Figures 1 , 4 and 5 ) provided with an aperture 21.
  • the body 12 is not provided with the second end side wall but with an opening 23 thereat.
  • a baffle 24 is inserted (to form a perfect seal), defined by a first wall which is straight (or in any event such as to be able to be disposed longitudinally within a longitudinal cavity 30 of the body 12 bounded by the walls 16, 17, 18, 19 and 20) and is arranged slightly inclined to a central plane P through said body 12 perpendicular to the lower wall 19 so as to define within the body 12 a first conduit 31 (connected to the aperture 21) in combination with the upper wall 18, side wall 16 and end wall 20 thereof, against which the wall 25 rests.
  • the baffle 24 is associated with a wall 32 to be positioned against the end opening 23 of the body 12, to close it. In proximity to this wall 32, the baffle 24 presents an aperture or recess 36 bounded by said wall 32 and by a web 37 associated with the baffle 24 and directed, when the baffle is inserted into the body 12, towards the lower wall 19 and the side wall 17 thereof, against which it rests.
  • This web is connected to a second wall 39 separating from the first wall 25 of the baffle 24 and directed towards and resting on the said side wall 17 of the body 12 to define in combination with this latter wall, with the upper wall 18 and with the web 37, a second conduit 40 through which the air moves in the opposite direction to that through the conduit 31.
  • This second wall 39 is inclined to the first wall.
  • the wall 39 has a length less than the baffle and has its free end 39A spaced from that side wall 20 of the body 12 which faces it.
  • an aperture 42 is obtained directed towards another (third) conduit 44 lying below the wall 39 and bounded at one end by the web 37 and by the walls 17 and 19 of the body 12.
  • the web 37 rests on the perimetral wall 16 and, as already stated, on the lower wall 19 to close the conduit 44 at a through hole 50 provided in the wall 16.
  • the silencer 9 comprises an aperture 21 for its air entry, and substantially parallel conduits 31, 40 and 44 through which the air entering the box body 12 passes (arrows K, W and X respectively) until it reaches the hole 50 through which the air leaves the silencer (arrow Y).
  • This hole 50 is connected to the mixer member 6 so that the air which has passed through the silencer can reach this member and the fan 5 connected to it. Any resonance, hissing, etc. is damped within the silencer, with the result that the boiler is silent in use.
  • the body 12 can have a depth (distance between the wall 20 and the wall 32) between 180 and 270 mm, preferably between 210 and 230 mm, such as to enable it to be used in a boiler of less than 300 mm in depth.
  • the baffle 24 of the silencer 9 also performs the function of guiding the air flows within the body 12 (intake and delivery to the fan), so reducing pressure drops.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Exhaust Silencers (AREA)
  • Chimneys And Flues (AREA)
  • Combustion Of Fluid Fuel (AREA)
  • Incineration Of Waste (AREA)
EP09162557.4A 2008-06-25 2009-06-12 Compact silencer for a condensation boiler Active EP2138767B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PL09162557T PL2138767T3 (pl) 2008-06-25 2009-06-12 Kompaktowy tłumik akustyczny do kotła kondensacyjnego
SI200931749T SI2138767T1 (sl) 2008-06-25 2009-06-12 Kompaktni duŔilnik zvoka za kondenzacijski grelnik vode
HRP20171646TT HRP20171646T1 (hr) 2008-06-25 2017-10-27 Kompaktni priguŔivač za kondenzacijski bojler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20081143 ITMI20081143A1 (it) 2008-06-25 2008-06-25 Silenziatore compatto per caldaia a condensazione

Publications (3)

Publication Number Publication Date
EP2138767A2 EP2138767A2 (en) 2009-12-30
EP2138767A3 EP2138767A3 (en) 2014-03-05
EP2138767B1 true EP2138767B1 (en) 2017-08-02

Family

ID=40301844

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09162557.4A Active EP2138767B1 (en) 2008-06-25 2009-06-12 Compact silencer for a condensation boiler

Country Status (11)

Country Link
EP (1) EP2138767B1 (it)
DK (1) DK2138767T3 (it)
ES (1) ES2644876T3 (it)
HR (1) HRP20171646T1 (it)
HU (1) HUE036800T2 (it)
IT (1) ITMI20081143A1 (it)
LT (1) LT2138767T (it)
PL (1) PL2138767T3 (it)
PT (1) PT2138767T (it)
RU (1) RU2509964C2 (it)
SI (1) SI2138767T1 (it)

Families Citing this family (3)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
CN111288654A (zh) * 2018-12-06 2020-06-16 青岛ē»ęµŽęŠ€ęœÆ开发åŒŗęµ·å°”ēƒ­ę°“å™Øęœ‰é™å…¬åø 降å™Ŗč£…ē½®åŠē‡ƒę°”ēƒ­ę°“å™Ø
IT202100002357A1 (it) * 2021-02-03 2022-08-03 Ali Group S R L ā€œdispositivo antirisonanza in un forno a gas del tipo per la cottura degli alimenti nella ristorazione collettivaā€
EP4375573A1 (en) * 2022-11-23 2024-05-29 Ademco Inc. A silencer

Family Cites Families (8)

* Cited by examiner, ā€  Cited by third party
Publication number Priority date Publication date Assignee Title
FR2043926A5 (it) * 1969-05-02 1971-02-19 Manoury Leon
GB1589007A (en) * 1977-09-02 1981-05-07 Broetje A Boilers with burners with combustion air fans and at least one combustion chamber gate
DE3307284C2 (de) * 1983-03-02 1985-11-14 Hans Dr.h.c. 3559 Battenberg VieƟmann GeblƤsebrenner fĆ¼r HeizkesseltĆ¼ren
RU2018051C1 (ru) * 1991-06-19 1994-08-15 Š“Š¾Š¼ŠµŠ»ŃŒŃŠŗŠøŠ¹ Š·Š°Š²Š¾Š“ "ŠšŠ¾Š¼Š¼ŃƒŠ½Š°Š»ŃŒŠ½ŠøŠŗ" Š“Š¾Ń€ŠµŠ»ŠŗŠ°
FR2731265B1 (fr) * 1995-03-02 1997-05-09 Chaffoteaux Et Maury Bruleur a gaz presentant une discretion acoustique amelioree
JPH10259956A (ja) * 1997-03-19 1998-09-29 Fujitsu General Ltd ę²¹ćŸćęø©ę°“ćƒœć‚¤ćƒ©
DE10202702B4 (de) * 2001-01-24 2013-01-10 IfTA IngenieurbĆ¼ro fĆ¼r Thermoakustik GmbH HeizgerƤt mit einem GehƤuse
RU2210699C2 (ru) * 2001-09-28 2003-08-20 ŠŠŗцŠøŠ¾Š½ŠµŃ€Š½Š¾Šµ Š¾Š±Ń‰ŠµŃŃ‚Š²Š¾ Š¾Ń‚ŠŗрытŠ¾Š³Š¾ тŠøŠæŠ° "Š Š£ŠœŠž" Š’Š¾Š“Š¾Š³Ń€ŠµŠ¹Š½Ń‹Š¹ ŠŗŠ¾Ń‚ŠµŠ» (Š²Š°Ń€ŠøŠ°Š½Ń‚Ń‹)

Non-Patent Citations (1)

* Cited by examiner, ā€  Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2138767A2 (en) 2009-12-30
SI2138767T1 (sl) 2017-12-29
ES2644876T3 (es) 2017-11-30
LT2138767T (lt) 2017-11-27
RU2009124273A (ru) 2010-12-27
PT2138767T (pt) 2017-11-02
HRP20171646T1 (hr) 2017-12-15
RU2509964C2 (ru) 2014-03-20
HUE036800T2 (hu) 2018-07-30
DK2138767T3 (da) 2017-11-13
EP2138767A3 (en) 2014-03-05
ITMI20081143A1 (it) 2009-12-26
PL2138767T3 (pl) 2018-02-28

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