EP3222928A1 - Ventilation unit - Google Patents
Ventilation unit Download PDFInfo
- Publication number
- EP3222928A1 EP3222928A1 EP16162162.8A EP16162162A EP3222928A1 EP 3222928 A1 EP3222928 A1 EP 3222928A1 EP 16162162 A EP16162162 A EP 16162162A EP 3222928 A1 EP3222928 A1 EP 3222928A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- filter
- plate
- air
- airflow
- duct
- 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
Links
- 238000009423 ventilation Methods 0.000 title claims abstract description 19
- 239000000428 dust Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 240000008574 Capsicum frutescens Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011491 glass wool Substances 0.000 description 1
- 238000007373 indentation Methods 0.000 description 1
- 238000005399 mechanical ventilation Methods 0.000 description 1
- 239000011490 mineral wool Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- -1 pollution Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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.
- 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.
- the object of the invention is attained if the device intimated above is characterized in that a plate is arranged between the duct and the filter approximately transversal to the direction of the airflow.
- 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)
- Ventilation (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
- 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 - In order to provide an efficient ventilation and particularly easy intake of supply air in a mechanical air extraction system, without causing chilly draughts in cold seasons, it is evidently necessary to heat the incoming air.
- The required heating is provided by the abovementioned radiator, and the supply air is hence conducted into the radiator. 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. 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.
- 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.
- It is hence an object of the present invention to provide a ventilation unit where the filter is utilized in a more efficient way, while the noise and draft are kept at a minimum level.
- The object of the invention is attained if the device intimated above is characterized in that a plate is arranged between the duct and the filter approximately transversal to the direction of the airflow.
- The present invention will now be described in greater detail hereinbelow, with reference to the accompanying drawings. In the accompanying drawings:
- Fig. 1
- is a schematic view showing the principle of a ventilation system for a room;
- Fig. 2
- is a section through the the ventilation unit with a device according to the invention;
- Fig. 3
- is a front view of the filter according to the invention; and
- Fig. 4
- is a sectional view of the duct and a plate included in the invention.
- In
Fig. 1 aroom 1 with a mechanical ventilation system is shown in principle. The ventilation system includes anexhaust fan 2, which draws air from theroom 1. Theexhaust 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 theroom 1, thus causing fresh air to enter from the outside through theair intake 3 in awall 4. Theair intake 3 may include one ormore ducts 5, in various configurations, directing an air flow towards afilter 6 in aventilation unit 7. From thefilter 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 theventilation unit 7 in greater detail, with a series of interconnectedducts 5 directing the airflow towards thefilter 6. Theducts 5 are embedded in aninsulation material 8, e. g. mineral wool or glass wool. Theinsulation material 8 serves not only to reduce an undesired heat transfer through thewall 4, but it will also reduce the noise from the air flow and noise from the outside. - At the end of the series of
ducts 5, there is asocket 9, to which aplate 10 is attached. Theplate 10 is formed from any airtight material, which is durable and easy to clean. In a preferred embodiment, theplate 10 is made of metal, but other materials such as plastics, glass, or rubber are possible alternatives. - The
plate 10 is positioned adjacent to thefilter 6, either in direct contact with thefilter 6 or at a short distance therefrom. In a preferred embodiment the distance between theplate 10 and thefilter 6 is approximately 2.5 mm. The distance may be greater, but is limited by the internal dimensions of theventilation unit 7. - The airflow from the
duct 5 exits from thesocket 9 reaches the surface of theplate 10. The airflow will then be deflected and spread out approximately radially towards the edges of theplate 10. The airflow will be directed along the surface of thefilter 6, and will gradually move through thefilter 6. The motion of the airflow along thefilter 6 will result in that the airflow is spread out over a larger area, and thefilter 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 thefilter 6. -
Fig 3 . shows a front view of thefilter 6 in theventilation unit 7. The approximate positions of thesocket 9 and of theplate 10 have been indicated, although their respective positions are on the farther side of thefilter 6. The diameter of theplate 10 is larger than the diameter of thesocket 9 in the preferred embodiment, in order to ensure a sufficient spreading of the airflow over the filter area. - As the
filter 6 is pleated in a preferred embodiment, thefilter 6 will not be completely blocked by theplate 10. Theplate 10 will at most only come in contact with the outer ends of the ridges of thefilter 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 theplate 10. Hence air will pass through thefilter 6 even in the area behind theplate 10. - The section from the side of the
socket 9 and theplate 10 inFig. 4 , shows thefastening clips 11 for fastening theplate 10 at the outer end of thesocket 9. Thefastening 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 orgrooves 12. Theplate 10 is slightly angled in relation to thesocket 9 in order to be approximately parallel with thefilter 6, which is also arranged with an angle to a vertical plane. As theclips 11 are slightly resilient, theplate 10 may be removed for cleaning and then remounted again. - Apart from the better utilization of the
filter 6, 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 theplate 10, the air will move into the radiator and further into the room at a lower speed than without theplate 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. - Further advantages are that 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 theplate 10. - The above described device for a ventilation unit may be varied concerning the materials used or the dimensions and proportions shown in the drawings, as long as the same or similar objectives of the invention are attained.
- 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.
Claims (6)
- Device in a ventilation unit (7), comprising an air intake (3), a duct (5), and a filter (6), arranged after the duct (5) as seen in a direction of an airflow from the intake (3), characterized in that a plate (10) is arranged between the duct (5) and the filter (6) approximately transversal to the direction of the airflow.
- Device according to claim 1, characterized in that the plate (10) is larger than the cross-section of the duct (5).
- Device according to claim 1 or 2, characterized in that the plate (10) is attached to a socket (9) at the open end of the duct (5), allowing the airflow to pass over the surface of the plate (10) and past its edges towards the filter (6).
- Device according to claim 3, characterized in that the plate (10) is releasably attached to the socket (9).
- Device according to any of claims 1 to 4, characterized in that the filter (6) is pleated.
- Device according to claim 5, characterized in that the plate (10) is arranged in contact with the filter (6).
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL16162162T PL3222928T3 (en) | 2016-03-24 | 2016-03-24 | Ventilation unit |
DK16162162.8T DK3222928T3 (en) | 2016-03-24 | 2016-03-24 | VENTILATION UNIT |
EP16162162.8A EP3222928B1 (en) | 2016-03-24 | 2016-03-24 | Ventilation unit |
LTEP16162162.8T LT3222928T (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 true EP3222928A1 (en) | 2017-09-27 |
EP3222928B1 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 (en) |
DK (1) | DK3222928T3 (en) |
LT (1) | LT3222928T (en) |
PL (1) | PL3222928T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3879188A1 (en) | 2020-03-10 | 2021-09-15 | Sigarth AB | Ventilation device for placement behind a centrally connected radiator |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1215527B (en) * | 1961-10-11 | 1966-04-28 | Gustav Kull | Filter for installation in protective walls |
DE3632268A1 (en) * | 1986-09-23 | 1988-04-07 | Alois Laternser | Method and apparatus for ventilating a room |
WO2000031474A1 (en) | 1998-11-19 | 2000-06-02 | Rettig Lämpö Oy | Supply air device in connection with radiator |
GB2464746A (en) * | 2008-10-24 | 2010-04-28 | Marine Systems Technology Ltd | Noise reduction in ducted air systems |
JP2010249368A (en) * | 2009-04-14 | 2010-11-04 | Toshiba Carrier Corp | Air supply shutter |
WO2015122832A1 (en) * | 2014-02-11 | 2015-08-20 | Lindab Ab | Ventilation device with varying air velocity |
-
2016
- 2016-03-24 EP EP16162162.8A patent/EP3222928B1/en active Active
- 2016-03-24 LT LTEP16162162.8T patent/LT3222928T/en unknown
- 2016-03-24 DK DK16162162.8T patent/DK3222928T3/en active
- 2016-03-24 PL PL16162162T patent/PL3222928T3/en unknown
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1215527B (en) * | 1961-10-11 | 1966-04-28 | Gustav Kull | Filter for installation in protective walls |
DE3632268A1 (en) * | 1986-09-23 | 1988-04-07 | Alois Laternser | Method and apparatus for ventilating a room |
WO2000031474A1 (en) | 1998-11-19 | 2000-06-02 | Rettig Lämpö Oy | Supply air device in connection with radiator |
GB2464746A (en) * | 2008-10-24 | 2010-04-28 | Marine Systems Technology Ltd | Noise reduction in ducted air systems |
JP2010249368A (en) * | 2009-04-14 | 2010-11-04 | Toshiba Carrier Corp | Air supply shutter |
WO2015122832A1 (en) * | 2014-02-11 | 2015-08-20 | Lindab Ab | Ventilation device with varying air velocity |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3879188A1 (en) | 2020-03-10 | 2021-09-15 | Sigarth AB | Ventilation device for placement behind a centrally connected radiator |
Also Published As
Publication number | Publication date |
---|---|
DK3222928T3 (en) | 2021-07-12 |
EP3222928B1 (en) | 2021-04-28 |
PL3222928T3 (en) | 2022-01-24 |
LT3222928T (en) | 2021-07-12 |
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