EP3222928B1 - Ventilation unit - Google Patents

Ventilation unit Download PDF

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Publication number
EP3222928B1
EP3222928B1 EP16162162.8A EP16162162A EP3222928B1 EP 3222928 B1 EP3222928 B1 EP 3222928B1 EP 16162162 A EP16162162 A EP 16162162A EP 3222928 B1 EP3222928 B1 EP 3222928B1
Authority
EP
European Patent Office
Prior art keywords
filter
air
plate
airflow
ventilation unit
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
EP16162162.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3222928A1 (en
Inventor
Håkan Thorn
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.)
Purmo Group Sweden AB
Original Assignee
Sigarth 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 Sigarth AB filed Critical Sigarth AB
Priority to LTEP16162162.8T priority Critical patent/LT3222928T/lt
Priority to PL16162162T priority patent/PL3222928T3/pl
Priority to DK16162162.8T priority patent/DK3222928T3/da
Priority to EP16162162.8A priority patent/EP3222928B1/en
Publication of EP3222928A1 publication Critical patent/EP3222928A1/en
Application granted granted Critical
Publication of EP3222928B1 publication Critical patent/EP3222928B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
    • F24F13/081—Air-flow control members, e.g. louvres, grilles, flaps or guide plates for guiding air around a curve
    • 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
    • F24F13/02—Ducting arrangements
    • 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
    • F24F13/02—Ducting arrangements
    • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
    • 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/28—Arrangement or mounting of filters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/0052—Details for air heaters
    • F24H9/0057—Guiding means
    • F24H9/0063—Guiding means in air channels

Definitions

  • the present invention relates to a device in a ventilation unit, comprising an air intake, a duct, and a filter, arranged after the duct as seen in a direction of an airflow from the inlet.
  • Ventilation units in connection with radiators are well known, e. g. from WO0031474A1 .
  • Air is drawn from an air intake, and is intended to pass via a radiator into a room, the device comprising a supply air filter, in order to keep dust and pollution from entering into the room with the outside air.
  • the required heating is provided by the abovementioned radiator, and the supply air is hence conducted into the radiator.
  • the supply air When the supply air has been heated by the radiator, it will rise by convection, and it will mix with the rest of the air present in the room.
  • a typical flow of air through an intake could amount to 8-10 litres per second.
  • the air filter will generally not give rise to a great drop in pressure in the airflow.
  • the filter In order to provide a large filter area for contact with the air supply, while the filter still fits into a fairly compact housing in or close to the radiator, the filter is often pleated, with a large number of valleys and ridges.
  • DE3632268A1 discloses a ventilation unit arranged behind a radiator 6, which comprises a hatch 18 disposed adjacent to, but after a filter 21 seen in the flow direction of the air.
  • the hatch has no air distribution function but a closing and opening function for the air intake.
  • WO2015/122832A1 discloses an air intake unit arranged for lowering the noise level from a ventilation plant.
  • An air permeable porous material 29 (similar to a filter) is used for noise reduction.
  • the air flowing through the air intake duct does not necessarily flow through the permeable porous material 29, given that a divider 31 is located like a lid over the greater part of the filter material 29.
  • This solution is also arranged such as if the air should pass the filter and not pass around it, the divider 31 is more or less arranged inside a duct part of the air intake.
  • JP2010249368A a filter is arranged for filtering of dust in a valve/air intake.
  • An anvil 6 for an outer lid 4 is disposed in a hole 7a in the center of the filter 7.
  • the anvil does not have an air distributing effect for a better use of the filter but is instead interfering the effective filter area.
  • GB2464746A a construction designed for noise reduction is disclosed. Air flows through a duct 10 against a porous particulate material 12. The air is spread by means of baffles 16 before the filter.
  • the document shows the technique for lowering speed of the air flowing through a filter, by widening the duct and by incorporating a greater filter area, and/or using air dividers for distributing air.
  • a filter housing 11 is arranged with a protecting plate 18.
  • the plate 18 is arranged perpendicular to the filters 30 of the filter housing and has the function of protecting the filters from direct hit from a water jet or the like.
  • a problem with the present ventilation units is that the air passes through only a limited part of the filter directly in front of a duct leading the air to the filter. Dust, pollen and other pollution particles will be concentrated to that part of the filter, and the filter is not used in an optimal way. In many cases the filter will have to be cleaned or exchanged more often, in order to maintain a high quality of the filtered air, than if all of the filter had been used for filtering the air.
  • a general concern in ventilation units is also a desire to reduce noise, both external noise, such as traffic noise, and noise arising from the units itself, e. g. from the air flow.
  • Another concern is the desire to maintain a high sense of comfort to the inhabitants of the room, by avoiding a sense of draft from the ventilation.
  • a room 1 with a mechanical ventilation system is shown in principle.
  • the ventilation system includes an exhaust fan 2, which draws air from the room 1.
  • the exhaust fan 2 may include a device for recovery of heat, although that is not an object of the present invention.
  • the exhaust fan 2 reduces the air pressure inside the room 1, thus causing fresh air to enter from the outside through the air intake 3 in a wall 4.
  • the air intake 3 may include one or more ducts 5, in various configurations, directing an air flow towards a filter 6 in a ventilation unit 7. From the filter 6, the air flow is led through a radiator, which has been omitted from the drawings, for the sake of clarity. The air will be heated in the radiator and will enter the room at a comfortable temperature.
  • Fig. 2 discloses the ventilation unit 7 in greater detail, with a series of interconnected ducts 5 directing the airflow towards the filter 6.
  • the ducts 5 are embedded in an insulation material 8, e. g. mineral wool or glass wool.
  • the insulation material 8 serves not only to reduce an undesired heat transfer through the wall 4, but it will also reduce the noise from the air flow and noise from the outside.
  • the plate 10 is formed from any airtight material, which is durable and easy to clean.
  • the plate 10 is made of metal, but other materials such as plastics, glass, or rubber are possible alternatives.
  • the plate 10 is positioned adjacent to the filter 6, either in direct contact with the filter 6 or at a short distance therefrom. In a preferred embodiment the distance between the plate 10 and the filter 6 is approximately 2.5 mm. The distance may be greater, but is limited by the internal dimensions of the ventilation unit 7.
  • the airflow from the duct 5 exits from the socket 9 reaches the surface of the plate 10.
  • the airflow will then be deflected and spread out approximately radially towards the edges of the plate 10.
  • the airflow will be directed along the surface of the filter 6, and will gradually move through the filter 6.
  • the motion of the airflow along the filter 6 will result in that the airflow is spread out over a larger area, and the filter 6 will be better utilized. Dust, pollution, and other particles will be filtered by a larger filter area, resulting in a lower contamination per area unit of the filter 6.
  • Fig 3 shows a front view of the filter 6 in the ventilation unit 7.
  • the approximate positions of the socket 9 and of the plate 10 have been indicated, although their respective positions are on the farther side of the filter 6.
  • the diameter of the plate 10 is larger than the diameter of the socket 9 in the preferred embodiment, in order to ensure a sufficient spreading of the airflow over the filter area.
  • the filter 6 will not be completely blocked by the plate 10.
  • the plate 10 will at most only come in contact with the outer ends of the ridges of the filter 6, thereby allowing a part of the airflow to enter into the valleys between the ridges where the filter is more or less covered by the plate 10. Hence air will pass through the filter 6 even in the area behind the plate 10.
  • the section from the side of the socket 9 and the plate 10 in Fig. 4 shows the fastening clips 11 for fastening the plate 10 at the outer end of the socket 9.
  • the fastening clips 11 are metal bands that are attached to one side of the plate, preferably by welding. The ends of the metal bands are crimped in order to mesh with corresponding indentations or grooves 12.
  • the plate 10 is slightly angled in relation to the socket 9 in order to be approximately parallel with the filter 6, which is also arranged with an angle to a vertical plane. As the clips 11 are slightly resilient, the plate 10 may be removed for cleaning and then remounted again.
  • another advantage of the deflection of the airflow is that the speed of the filtered airflow will be lowered. Since the volume of the airflow is constant, but the filter area which is actively filtering the airflow is significantly larger than without the plate 10, the air will move into the radiator and further into the room at a lower speed than without the plate 10. The sense of a draft from the ventilation unit will be greatly reduced. Also the lower speed of the airflow through the radiator will allow for a better heating of the air. An improved heating of the air will result in a supply air temperature which will be more pleasant.
  • the plate 10 limits the airflow in case of sudden gusts of wind into the intake. This reduces both the risk of sudden drafts in the room as well as noise from the wind. The need for a separate flow limiting equipment is hence eliminated. Also, there is a general noise reduction by up to 3 dB by the provision of the plate 10.
  • the fastening of the plate on the socket could be varied with a number of different releasable fastening means that are already known in the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Ventilation (AREA)
EP16162162.8A 2016-03-24 2016-03-24 Ventilation unit Active EP3222928B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
LTEP16162162.8T LT3222928T (lt) 2016-03-24 2016-03-24 Ventiliacinis blokas
PL16162162T PL3222928T3 (pl) 2016-03-24 2016-03-24 Jednostka wentylacyjna
DK16162162.8T DK3222928T3 (da) 2016-03-24 2016-03-24 Ventilationsenhed
EP16162162.8A EP3222928B1 (en) 2016-03-24 2016-03-24 Ventilation unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16162162.8A EP3222928B1 (en) 2016-03-24 2016-03-24 Ventilation unit

Publications (2)

Publication Number Publication Date
EP3222928A1 EP3222928A1 (en) 2017-09-27
EP3222928B1 true EP3222928B1 (en) 2021-04-28

Family

ID=55628876

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16162162.8A Active EP3222928B1 (en) 2016-03-24 2016-03-24 Ventilation unit

Country Status (4)

Country Link
EP (1) EP3222928B1 (pl)
DK (1) DK3222928T3 (pl)
LT (1) LT3222928T (pl)
PL (1) PL3222928T3 (pl)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE544319C2 (sv) 2020-03-10 2022-04-05 Sigarth Ab En ventilationsanordning anordnad för montering mellan en vägg och vid en vägg anordnad radiator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1215527B (de) * 1961-10-11 1966-04-28 Gustav Kull Filter zum Einbau in Schutzbauwaende
DE3632268A1 (de) * 1986-09-23 1988-04-07 Alois Laternser Verfahren und vorrichtung zum belueften eines raumes
FI112821B (fi) 1998-11-19 2004-01-15 Rettig Laempoe Oy Tuloilmalaite lämpöpatterien yhteydessä
GB0819534D0 (en) * 2008-10-24 2008-12-03 Marine Systems Technology Ltd Noise reduction in ducted air systems
JP5404146B2 (ja) * 2009-04-14 2014-01-29 東芝キヤリア株式会社 給気シャッター
SE541076C2 (sv) * 2014-02-11 2019-03-26 Lindab Ab Ventilationsdon med ljuddämpning.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
DK3222928T3 (da) 2021-07-12
EP3222928A1 (en) 2017-09-27
PL3222928T3 (pl) 2022-01-24
LT3222928T (lt) 2021-07-12

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