EP2198205A1 - Schalldämpfer für einen ventilatorkonvektor - Google Patents

Schalldämpfer für einen ventilatorkonvektor

Info

Publication number
EP2198205A1
EP2198205A1 EP07838828A EP07838828A EP2198205A1 EP 2198205 A1 EP2198205 A1 EP 2198205A1 EP 07838828 A EP07838828 A EP 07838828A EP 07838828 A EP07838828 A EP 07838828A EP 2198205 A1 EP2198205 A1 EP 2198205A1
Authority
EP
European Patent Office
Prior art keywords
set forth
sound absorbing
fan
coil unit
fan coil
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
EP07838828A
Other languages
English (en)
French (fr)
Other versions
EP2198205A4 (de
EP2198205B1 (de
Inventor
Eric C. Pitisci
Frederic C. Albert
Didier G. Joly
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.)
Carrier Corp
Original Assignee
Carrier Corp
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 Carrier Corp filed Critical Carrier Corp
Publication of EP2198205A1 publication Critical patent/EP2198205A1/de
Publication of EP2198205A4 publication Critical patent/EP2198205A4/de
Application granted granted Critical
Publication of EP2198205B1 publication Critical patent/EP2198205B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • 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
    • F24F2013/242—Sound-absorbing material

Definitions

  • This invention relates generally to air conditioning systems and, more particularly, to a method and apparatus for reducing sound emanating from the return air opening of a fan coil unit.
  • Fan coils are commonly provided in air conditioning systems to provide a heat exchange relationship between air that is being returned to the unit from a space to be conditioned, and a medium, in a liquid, vapor or gaseous form, which has been "conditioned" in a closed loop air conditioning system.
  • the fan coil therefore includes a heat exchanger coil through which the medium is circulated and over which the return air is circulated by way of the fan.
  • the fan draws the return air into the fan coil unit and over the heat exchanger coil, it necessarily produces a good amount of noise which then tends to emanate in the direction of the space from which the return air is flowing.
  • the fan coil may be connected to the space by way of a duct, in which case the sound may be somewhat attenuated by the air in the duct, but the fan coil may connect directly to the space without an attached duct, in which case, there tends to be no attenuation of the emitted sound. In either case, it is desirable to reduce the amount of sound that is transmitted to the space to be conditioned.
  • one or more sound attenuating elements are placed in the return air inlet duct of the fan coil unit such that they absorb sound as it emanates from the fan toward the inlet opening.
  • the sound absorbing elements are so placed within the duct that there are portions thereof between the entire fan and the entire inlet opening, as seen along axially extending lines.
  • the sound absorbing elements include a central element extending across a central portion of the inlet duct and a pair of spaced peripheral elements located on opposite walls thereof.
  • the inlet duct is rectangular
  • the centrally located element is cylindrical in form
  • the peripheral elements include elements which are triangular in form.
  • FIG. 1 is an exploded perspective view of a fan coil unit in accordance with the prior art.
  • FIG. 2 is a perspective view of ducted fan coil unit in accordance with the prior art.
  • FIG. 3 is a fan coil unit with the present invention incorporated therein.
  • FIG. 4 is a front perspective view thereof.
  • FIG. 5 is a side view thereof.
  • FIG. 6 is a perspective view of the internal components thereof.
  • FIG. 7 is a longitudinal side view of a fan coil unit with the present invention incorporated therein. Detailed Description of the Invention
  • FIG. 1 Shown in Fig. 1 is a typical ducted fan coil unit 11 in accordance with the prior art.
  • the fan coil unit 11 includes an outer casing 12 in which there is disposed a heat exchanger (not shown) through which refrigerant is circulated and over which air is circulated by way of one or more fan assemblies 13 disposed within the casing 12 as shown.
  • a filter 14 is preferably placed on the upstream side of the fan assemblies 13 to filter out any solid impurities that may be in the air stream.
  • On the upstream side of the casing 12 is a return air plenum 16 having a plurality of openings 17 which are fluidly connected to return air ducts (not shown).
  • a supply air plenum 18 On the downstream side of the casing 12 is a supply air plenum 18 with openings 19 which are fluidly connected to supply air ducts (not shown) from supplying conditioned air to spaces within a building.
  • FIG. 2 the same type of fan coil in 11 is shown but without the return air plenum 16. That is, there is no return air plenum 16 nor any return air ducts. Rather, the filter 14 at the upstream end of the casing interfaces directly with the space from which the return air is flowing. Thus, there is no attenuation of the sound which tends to emanate upstream from the fan assembly 13, and directly into the space from which the return air is flowing.
  • Fig. 3 There is shown in Fig. 3 a similar fan coil unit without a return air plenum 16 or return air ducts.
  • a sound attenuator assembly 21 is connected thereto for purposes of attenuating the sound that would otherwise would emanate toward the origin of the return air flow.
  • the sound attenuator assembly 21 is connected directly to the upstream end of the fan coil unit such that all air passing into the fan coil unit 11 passes first through the sound attenuator assembly 21.
  • the sound attenuator assembly 21 is more fully shown in Figs. 4-6.
  • the assembly includes a rectangular casing 22 having an inlet opening 23 leading to an inlet duct 25 and having an outlet 24 at its end. It includes an upper wall 26 and a lower wall 27. As will be seen in Fig. 4, there is disposed within the casing 22 a centrally located, transversely extending, acoustical insulation member 28. Also disposed within the casing 22 are upper and lower wall peripheral acoustical insulation members 29 and 31. These members are shown in greater detail in Figs. 5 and 6.
  • the acoustical insulation member 28 is cylindrical in form and extends transversely across a central portion of the casing 22 with its ends being secured to the sides of the casing.
  • the peripheral acoustical insulation members 29 and 31 are generally triangular in shape and are mounted in an upstream position with respect to the insulation member 28 as shown. They may me mounted directly to the respective upper wall 26 and lower wall 27 or may be attached to the respective acoustical insulation members 32 and 33, which, in turn, are connected directly to the respective upper wall 26 and lower wall 27.
  • the respective positions of the various acoustical insulation members will be more fully described hereinafter.
  • a filter 34 may be placed on the upstream end of the sound attenuator assembly 21 to either augment or replace the filter 14 that is provided at the inlet end of the fan coil unit 11 as shown in Fig. 3.
  • FIG. 7 Shown in Fig. 7 is a longitudinal profile of a fan coil unit 11 having a sound attenuator assembly 21 attached to its upstream end thereof.
  • a centrifugal fan or blower 36 is positioned with the casing 12 to draw air in through the sound attenuator assembly 21 and pass the air through a heat exchanger coil 37 after which it flows to a supply air plenum 18, through the supply air ducts, and finally to a spaced to be conditioned.
  • the sound attenuator assembly 21 with its elements 28, 29 and 31 are provided.
  • the relative positioning of those elements, and to some extent their shape, are designed to absorb, deflect, or attenuate the sound waves which are traveling along an axial direction as indicated by the dashed lines.
  • the sound absorbing elements 28, 29 and 31 are so placed within the duct that there are portions thereof between the entire fan and the entire inlet opening as seen along the axially extending lines. At the same time, however, this arrangement results in a relatively low pressure drop through the assembly 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
EP07838828.7A 2007-09-25 2007-09-25 Schalldämpfer für einen ventilatorkonvektor Not-in-force EP2198205B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2007/020698 WO2009041937A1 (en) 2007-09-25 2007-09-25 Sound attenuator for a fan coil

Publications (3)

Publication Number Publication Date
EP2198205A1 true EP2198205A1 (de) 2010-06-23
EP2198205A4 EP2198205A4 (de) 2014-04-09
EP2198205B1 EP2198205B1 (de) 2018-11-28

Family

ID=40511710

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07838828.7A Not-in-force EP2198205B1 (de) 2007-09-25 2007-09-25 Schalldämpfer für einen ventilatorkonvektor

Country Status (4)

Country Link
EP (1) EP2198205B1 (de)
CN (1) CN101809375A (de)
ES (1) ES2701871T3 (de)
WO (1) WO2009041937A1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8087492B2 (en) 2010-03-08 2012-01-03 Huntair, Inc. Methods and systems for integrating sound attenuation into a filter bank
SI24277A (sl) * 2013-01-22 2014-07-31 Timplast D.O.O. Naprava za prezračevanje z rekuperacijo prednostno nadometni stropni razdelilec
US10829228B2 (en) 2017-01-17 2020-11-10 Itt Manufacturing Enterprises, Llc Fluid straightening connection unit
US11768007B2 (en) 2020-02-02 2023-09-26 Johnson Controls Tyco IP Holdings LLP Sound attenuator integral with a housing of a terminal unit

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3330379A (en) * 1964-11-12 1967-07-11 Loren Cook Company Device for attenuating sound waves and the combination thereof with a curb and ventilator
GB1344268A (en) * 1970-11-05 1974-01-16 Sound Attenuators Ltd Sound attenuating unit
US6419576B1 (en) * 2001-03-22 2002-07-16 Air Handling Engineering Ltd. Sound attenuating inlet silencer for air supplying fan
WO2005073640A1 (ja) * 2004-01-28 2005-08-11 Takayasu Co., Ltd. 送風ダクトの騒音低減方法
WO2007012537A1 (de) * 2005-07-29 2007-02-01 BSH Bosch und Siemens Hausgeräte GmbH Schalldämpfer, insbesondere für ein hausgerät

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6342005B1 (en) * 1999-09-30 2002-01-29 Carrier Corporation Active noise control for plug fan installations

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3330379A (en) * 1964-11-12 1967-07-11 Loren Cook Company Device for attenuating sound waves and the combination thereof with a curb and ventilator
GB1344268A (en) * 1970-11-05 1974-01-16 Sound Attenuators Ltd Sound attenuating unit
US6419576B1 (en) * 2001-03-22 2002-07-16 Air Handling Engineering Ltd. Sound attenuating inlet silencer for air supplying fan
WO2005073640A1 (ja) * 2004-01-28 2005-08-11 Takayasu Co., Ltd. 送風ダクトの騒音低減方法
WO2007012537A1 (de) * 2005-07-29 2007-02-01 BSH Bosch und Siemens Hausgeräte GmbH Schalldämpfer, insbesondere für ein hausgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2009041937A1 *

Also Published As

Publication number Publication date
EP2198205A4 (de) 2014-04-09
ES2701871T3 (es) 2019-02-26
WO2009041937A1 (en) 2009-04-02
CN101809375A (zh) 2010-08-18
EP2198205B1 (de) 2018-11-28

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