WO2003014631B1 - Sound damper for exhaust air from a fan device - Google Patents

Sound damper for exhaust air from a fan device

Info

Publication number
WO2003014631B1
WO2003014631B1 PCT/SE2002/001173 SE0201173W WO03014631B1 WO 2003014631 B1 WO2003014631 B1 WO 2003014631B1 SE 0201173 W SE0201173 W SE 0201173W WO 03014631 B1 WO03014631 B1 WO 03014631B1
Authority
WO
WIPO (PCT)
Prior art keywords
sound
air
outlet duct
wall
sound damper
Prior art date
Application number
PCT/SE2002/001173
Other languages
French (fr)
Other versions
WO2003014631A1 (en
Inventor
Leif Lundberg
Original Assignee
Keyvent Ab
Leif Lundberg
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 Keyvent Ab, Leif Lundberg filed Critical Keyvent Ab
Publication of WO2003014631A1 publication Critical patent/WO2003014631A1/en
Publication of WO2003014631B1 publication Critical patent/WO2003014631B1/en

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F7/00—Ventilation
    • F24F7/007—Ventilation with forced flow
    • 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
    • F04D29/664—Sound attenuation by means of sound absorbing material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/02—Energy absorbers; Noise absorbers
    • F16L55/033—Noise absorbers
    • F16L55/0336—Noise absorbers by means of sound-absorbing materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Duct Arrangements (AREA)
  • Building Environments (AREA)

Abstract

Sound damper (10) for extraction air from a fan assembly (20), including a sound-damping layer at an outlet duct (12) for the xtracted air. The outlet duct (12) is perforated (14) and enclosed at a distance by an outer wall (28) that includes the sound-damping layer (36).

Claims

AMENDED CLAIMS[received by the International Bureau on 03 December 2002 (03.12.02); Original claims 1-4 replaced by amended claims 1-4 (1 page)]AMENDED CLAIMS
1. Sound damper (10) at a fan assembly (20 for extraction air, including sound- damping layers at a perforated outlet duct (12) for the extracted air characterised in that the outlet duct (12) is enclosed at a distance by an outer wall (28) to form a free space and allow admittance of surrounding air therebetween, said outer wall (28) comprising the sound- damping layer (36).
2. Sound damper according to claim 1 characterised in that a non- perforated ducting section (18) that tapers towards the cross-section of the outlet duct (12) in the direction of the flow (19) of extracted air is arranged between the fan assembly (20) and the outlet duct (12).
3. Sound damper according any of the previous claims characterised in that the outer wall (28) includes a box construction consisting of board-shaped wall elements where each, from the inside and outwards, contains an inner perforated surface layer (32), the sound-damping layer (36) and an outer surface layer (30).
4. Sound damper according any of the previous claims characterised in that the outer wall (28) is arranged with an air entrance (40) at an end opposite to the outlet end (16) of the outlet duct (12) viewed in an outlet direction (19) of the extraction air to thereby facilitate said admittance of air.
PCT/SE2002/001173 2001-08-07 2002-06-18 Sound damper for exhaust air from a fan device WO2003014631A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0102665A SE522922C2 (en) 2001-08-07 2001-08-07 Silencer for evacuation air at fan unit
SE0102665-7 2001-08-07

Publications (2)

Publication Number Publication Date
WO2003014631A1 WO2003014631A1 (en) 2003-02-20
WO2003014631B1 true WO2003014631B1 (en) 2004-04-08

Family

ID=20284983

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/001173 WO2003014631A1 (en) 2001-08-07 2002-06-18 Sound damper for exhaust air from a fan device

Country Status (2)

Country Link
SE (1) SE522922C2 (en)
WO (1) WO2003014631A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9039352B2 (en) * 2012-11-05 2015-05-26 General Electric Company Sound attenuating chimney element for a turbomachine system
US9610045B2 (en) 2015-07-31 2017-04-04 Medtronic, Inc. Detection of valid signals versus artifacts in a multichannel mapping system
CN206674171U (en) * 2017-04-13 2017-11-24 深圳麦博电器有限公司 One kind vibration audio amplifier

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL262265A (en) * 1960-03-11 1900-01-01
US3511336A (en) * 1969-06-10 1970-05-12 Rink Corp Sound attenuator for air flow
CH529930A (en) * 1971-03-04 1972-10-31 Turbon Ventilatoren Und App Ba Fan, in particular axial fan
HU182491B (en) * 1977-04-08 1984-01-30 Fuetoeber Epueletgep Termekek Sound-damping deviceparticularly for reducing noise spreading in air duct
US5663535A (en) * 1995-08-28 1997-09-02 Venturedyne, Ltd. Sound attenuator for HVAC systems

Also Published As

Publication number Publication date
SE0102665L (en) 2003-02-08
WO2003014631A1 (en) 2003-02-20
SE0102665D0 (en) 2001-08-07
SE522922C2 (en) 2004-03-16

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