EP0044304B1 - Sound damping in ventilation conduits - Google Patents

Sound damping in ventilation conduits Download PDF

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Publication number
EP0044304B1
EP0044304B1 EP80901859A EP80901859A EP0044304B1 EP 0044304 B1 EP0044304 B1 EP 0044304B1 EP 80901859 A EP80901859 A EP 80901859A EP 80901859 A EP80901859 A EP 80901859A EP 0044304 B1 EP0044304 B1 EP 0044304B1
Authority
EP
European Patent Office
Prior art keywords
conduits
sound damping
sound
framework
transverse connection
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.)
Expired
Application number
EP80901859A
Other languages
German (de)
French (fr)
Other versions
EP0044304A1 (en
Inventor
Lars Olof Andersson
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.)
Strangbetong AB
Original Assignee
Strangbetong AB
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 Strangbetong AB filed Critical Strangbetong AB
Publication of EP0044304A1 publication Critical patent/EP0044304A1/en
Application granted granted Critical
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • 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

Definitions

  • This invention relates to sound damping device comprising a set of parallel ventilation conduits in flooring elements of concrete which set of conduits at one end are connected to a feed conduit and at the other end are connected to an exhaust means leading to a room thereunder, at least two adjacent conduits being closed in the same end and connected by only one transverse connection, so that the conduits of the pair are connected in series for passing ventilation air to said exhaust means.
  • Parallel conduits in the direction of the span of prefabricated flooring elements of concrete are often used for branching off the ventilation system in a building.
  • some of the conduits in the framework elements are connected in one end to a feed conduit, and the air is thereafter passed on through the conduits to exhaust means connected to a conduit somewhere along its length or at its end.
  • the conduits can also be connected in series so that the ventilation medium is passed through a number of parallel conduits within the element. See for instance DE-C-800 331.
  • the invention relates to a construction which is so formed that the concrete elements will act as sound damping means for noise from fans and sound, which is transmitted from one room to another via the ventilation piping.
  • the object of the invention is to improve the sound damping effect of a concrete element of the form stated above.
  • the damping device is hereby characterized in that the transverse connection is placed at a distance of 0.5-2.0 m from the end closures of the conduits and that a plug of sound damping material, such as mineral wool, is placed in each conduit between the end closure of the conduit and the transverse connection.
  • the figure shows two embodiments of the invention, where a concrete slab is cut and taken apart in its two parts in order to show the conduits.
  • the figure is thus a perspective view showing a concrete slab 1, and the slab is cut transversely so that a small piece 2 has been parted, whereby the openings of five conduits 3, 4, 5, 6 and 7 can be seen.
  • a transverse connection 8 has been opened between the conduits 3 and 4 in that a cavity has been cut down into both conduit 3 and the conduit 4 from the upper side 9 of the slab before the concrete has been set.
  • the cavity is covered in the upper side 9 by means of plastics, a rubber plug or other suitable material.
  • the plug is shown by phantom lines and is denoted by 10. The plug only reaches the upper edge of the conduits 3 and 4 and it is thus seen, that a connection 8 is established between the two conduits 3 and 4 under the plug 10.
  • the distance between the left end of the slab and the transverse connection 8 can be anything between 0.5 to 2.0 m.
  • a plug of sound damping material (not shown) is inserted in the conduits between the end closure and the transverse connection 8.
  • a second embodiment of the transverse connection is also shown in the figure from which the connection between conduits 5, 6 and 7 can be seen.
  • This connection has been established in that a bore has been drilled transversely to the conduits 5, 6 and 7 and ending in the conduit 5.
  • the bore is parallel to the upper side 9.
  • the bore is plugged between the edge 11 of the slab and the conduit 7 by a plug 12 and this can be done after that the slab has been set by inserting an expander plug or the like in the bore. Concrete or plastics can also be used for this purpose. It is obvious that according to the two embodiments described any number of conduits can be connected though in the first case it has been described a connection between the two conduits and the second embodiment includes a connection between three conduits.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Duct Arrangements (AREA)
  • Building Environments (AREA)
  • On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
  • Pipe Accessories (AREA)

Abstract

The idea relates to arrangement and method in sound damping of ventilation conduits in framework elements. In order to achieve a better sound damping of sound from fans, which occurs in ventilating systems it has been shown that a good damping can be achieved if the ventilating air is circulated in two or more conduits before being let out in the room. For that purpose, a transverse connection is established between two separate parallel conduits so that these conduits are connected in series for the ventilating air, which hereby is passed in zigzag through the conduits in the framework elements. The arrangement, thus, is so formed, that the framework acts as sound damping means for noise from fans and sound, which is transmitted from one room to another via the ventilating piping. The parallel conduits (3, 4, 5, 6) in the framework are closed in their ends by means of concrete plugs, which normally are casted on the building place after the erection of the framework elements and which conduits have at least one connection (8) which is placed transversely between two conduits (3, 4) and which is placed at the end of the framework elements, which is opposite to the inlet end of the conduits for the ventilating air. Hereby two or more conduits may be connected in series by means of the transverse connection.

Description

  • This invention relates to sound damping device comprising a set of parallel ventilation conduits in flooring elements of concrete which set of conduits at one end are connected to a feed conduit and at the other end are connected to an exhaust means leading to a room thereunder, at least two adjacent conduits being closed in the same end and connected by only one transverse connection, so that the conduits of the pair are connected in series for passing ventilation air to said exhaust means.
  • Parallel conduits in the direction of the span of prefabricated flooring elements of concrete are often used for branching off the ventilation system in a building. Hereby some of the conduits in the framework elements are connected in one end to a feed conduit, and the air is thereafter passed on through the conduits to exhaust means connected to a conduit somewhere along its length or at its end. The conduits can also be connected in series so that the ventilation medium is passed through a number of parallel conduits within the element. See for instance DE-C-800 331.
  • The invention relates to a construction which is so formed that the concrete elements will act as sound damping means for noise from fans and sound, which is transmitted from one room to another via the ventilation piping.
  • The object of the invention is to improve the sound damping effect of a concrete element of the form stated above. The damping device is hereby characterized in that the transverse connection is placed at a distance of 0.5-2.0 m from the end closures of the conduits and that a plug of sound damping material, such as mineral wool, is placed in each conduit between the end closure of the conduit and the transverse connection.
  • The invention will now be described in connection with the accompanying drawing.
  • The figure shows two embodiments of the invention, where a concrete slab is cut and taken apart in its two parts in order to show the conduits.
  • The figure is thus a perspective view showing a concrete slab 1, and the slab is cut transversely so that a small piece 2 has been parted, whereby the openings of five conduits 3, 4, 5, 6 and 7 can be seen. A transverse connection 8 has been opened between the conduits 3 and 4 in that a cavity has been cut down into both conduit 3 and the conduit 4 from the upper side 9 of the slab before the concrete has been set. After that cavity has been cut and after that the concrete has set, the cavity is covered in the upper side 9 by means of plastics, a rubber plug or other suitable material. The plug is shown by phantom lines and is denoted by 10. The plug only reaches the upper edge of the conduits 3 and 4 and it is thus seen, that a connection 8 is established between the two conduits 3 and 4 under the plug 10.
  • The distance between the left end of the slab and the transverse connection 8 can be anything between 0.5 to 2.0 m. A plug of sound damping material (not shown) is inserted in the conduits between the end closure and the transverse connection 8.
  • A second embodiment of the transverse connection is also shown in the figure from which the connection between conduits 5, 6 and 7 can be seen. This connection has been established in that a bore has been drilled transversely to the conduits 5, 6 and 7 and ending in the conduit 5. The bore is parallel to the upper side 9. In order to establish a connection only between the conduits 5, 6 and 7 the bore is plugged between the edge 11 of the slab and the conduit 7 by a plug 12 and this can be done after that the slab has been set by inserting an expander plug or the like in the bore. Concrete or plastics can also be used for this purpose. It is obvious that according to the two embodiments described any number of conduits can be connected though in the first case it has been described a connection between the two conduits and the second embodiment includes a connection between three conduits.

Claims (1)

  1. Sound damping device comprising a set of parallel ventilation conduits (3, 4, 5, 6, 7) in flooring elements of concrete which set of conduits at one end are connected to a feed conduit and at the other end are connected to an exhaust means leading to a room thereunder, at least two adjacent conduits (3, 4; 4, 5) being closed at the same end and connected by only one transverse connection (8), so that the conduits of the pair are connected in series for passing ventilation air to said exhaust means, characterized in that the transverse connection (8) is placed at a distance of 0,5-2,0 m from the end closures of the conduits and that a plug of sound damping material, such as mineral wool, is placed in each conduit between the end closure of the conduit and the transverse connection (8).
EP80901859A 1979-10-05 1980-10-01 Sound damping in ventilation conduits Expired EP0044304B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE7908293 1979-10-05
SE7908293A SE422609B (en) 1979-10-05 1979-10-05 DEVICE AND PROCEDURE FOR SOUND MUTING OF VENTILATION CHANNELS IN BED CLOVER

Publications (2)

Publication Number Publication Date
EP0044304A1 EP0044304A1 (en) 1982-01-27
EP0044304B1 true EP0044304B1 (en) 1984-03-07

Family

ID=20338990

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80901859A Expired EP0044304B1 (en) 1979-10-05 1980-10-01 Sound damping in ventilation conduits

Country Status (8)

Country Link
EP (1) EP0044304B1 (en)
BE (1) BE888283A (en)
DE (1) DE3066852D1 (en)
DK (1) DK235981A (en)
FI (1) FI68697C (en)
NO (1) NO152947C (en)
SE (1) SE422609B (en)
WO (1) WO1981001026A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2033425A1 (en) * 1990-01-09 1991-07-10 Shlomo Avni Eavesdropping-proof room and sound dampening devices therefor

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE800331C (en) * 1949-03-26 1950-10-30 Buderus Eisenwerk Process for improving the thermal insulation properties of precast concrete components such as slabs, stones and the like. Like., with continuous cavities

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US640176A (en) * 1899-02-23 1900-01-02 Heinrich Lehmann Process of producing hollow walls and roofs of cast mortar.
FR1227466A (en) * 1959-03-13 1960-08-22 hollow reinforced concrete elements and method of assembly thereof
SE349842B (en) * 1970-12-21 1972-10-09 Straengbetong Ab

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE800331C (en) * 1949-03-26 1950-10-30 Buderus Eisenwerk Process for improving the thermal insulation properties of precast concrete components such as slabs, stones and the like. Like., with continuous cavities

Also Published As

Publication number Publication date
WO1981001026A1 (en) 1981-04-16
FI811637L (en) 1981-05-27
SE422609B (en) 1982-03-15
NO152947C (en) 1985-12-18
EP0044304A1 (en) 1982-01-27
BE888283A (en) 1981-07-31
DE3066852D1 (en) 1984-04-12
NO811847L (en) 1981-06-01
FI68697C (en) 1985-10-10
DK235981A (en) 1981-05-29
SE7908293L (en) 1981-04-06
NO152947B (en) 1985-09-09
FI68697B (en) 1985-06-28

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