DK178180B1 - Decentralized ventilation system for air ventilation in rooms of buildings - Google Patents

Abstract

Disclosed herein is a decentralized ventilation system for the rooms of buildings comprising a ventilation unit suitable for being mounted in an area below a window of the room (such as the sill area). The ventilation unit comprises a counter-flow heat exchanger and an air-filter unit with a filter supply unit upstream to the counterflow heat exchanger.

Description

Decentralized ventilation system for air ventilation in rooms of buildings Technical field of the invention

The present invention relates to decentralized ventilation systems for rooms of buildings.

Background of the invention

Ventilation is a necessity for the health and comfort of occupants of all buildings. Ventilation supplies air for occupants to breathe, and removes moisture, odours, and indoor pollutants like carbon dioxide. Ventilation design for apartment buildings is inherently more complex than what is required for single-family homes. Most apartments have limited exposure of walls and windows to the outside environment. Additionally, the natural physical forces that move air are more pronounced in taller buildings. This includes infiltration and exfiltration, the unintentional and uncontrollable flow of air through cracks and leaks in the building envelope. There are two primary forms of intentional ventilation; natural and mechanical. Low-rise buildings (3 stories and under) often utilize natural ventilation, that is, air supplied and vented through operable windows. High-rise buildings (over 3 stories) often use mechanical ventilation systems in the form of fans, air-inlets, ducts and registers, but may also rely on operable windows when mechanical systems fail to provide adequate ventilation.

Mechanical ventilation systems are capable of providing a controlled rate of air exchange and should respond to the varying needs of occupants and pollutant loads, irrespective of climate vagaries. While some systems filter supply air, others have provisions for energy recovery from the exhaust air stream. In some countries, especially in parts of Canada and Scandinavia, mechanical systems are being incorporated into virtually all new apartment building construction and are also being included in many building renovation programs. There is an increasing demand for ventilation systems that does not ruin the look of the building fagade. Hence, systems that are positioned on the fagade are not accepted.

The typical apartment buildings mechanical ventilation system has a central supply system which conditions the air (e.g., heats, cools, and filters) and individual exhaust air fans serving each apartment. However, the individual residents seldom agree on how the central supply should be set.

From the residents’ perspective, adequate ventilation may be defined as whatever air is needed to remove odours and to provide a healthy and comfortable environment. Hence, they may not be aware of the importance of ventilation in reducing odourless pollutants, such as moisture or carbon monoxide.

Residents, who are responsible for their heating and or cooling bill, will be more sensitive to the energy cost associated with ventilation. Furthermore, if residents are unhappy with existing mechanical ventilation systems, for reasons like noise from associated fans, drafts produced by high air velocities, the location of registers, or discomfort from ventilation temperature, they may turn off, or otherwise undermine the operation of their systems.

EP2172713 discloses a ventilating apparatus that comprises: a blower fan; a filter, which collect dust and the like contained in an air flow generated by the blower fan; and a control unit that uses a time input value, which is for outputting a filter sign, to increase a target rotational speed of the blower fan with a prescribed frequency.

WO2011132995 discloses a ventilation device for windows with an air purifying function, comprising a heat exchange unit, which is installed at a window and doorframe to perform heat exchange between outdoor air and indoor air; and an air purification part, which is provided in the heat exchange unit to purify the indoor air.

It is therefore desirable to provide a system which can eliminate some or all of the above problems.

Summary of the invention

Disclosed herein is a decentralized ventilation system for the rooms of buildings comprising a ventilation unit suitable for being mounted in an area below a window of the room (such as the sill area). The position of the ventilation system is crucial in order to maximize the heat uniformity within the room. The inventors have proven that the sensation of draft felt by the inhabitants of a room can be completely removed when a ventilation system according to the present invention is installed, and have been able to decrease the temperature difference at the floor and ceiling considerably.

The system comprises an air intake port facing the outside of the building, an air exhaust port facing a room of the building, an air exhaust port facing the outside of the building, an air intake port facing a room of the building, and a ventilation unit.

The system comprises a ventilation unit comprising a supply air fan in air (stream) communication with an air intake port facing the outside of the building and also in air communication with an air exhaust port facing a room of the building.

In one or more embodiments, the air intake port facing the outside of the building is also a part of the system arranged below the window.

In one or more embodiments, the air exhaust port facing a room of the building is also a part of the system arranged below the window.

The ventilation unit also comprises an exhaust air fan in air communication with an air exhaust port facing the outside of the building and also in air communication with an air intake port facing a room of the building.

In one or more embodiments, the air exhaust port facing the outside of the building is also a part of the system arranged below the window.

In one or more embodiments, the air intake port facing a room of the building is also a part of the system arranged below the window.

The ventilation unit comprises a counter-flow heat exchanger comprising a first plurality of intake air flow channels in air communication with the air intake port facing the outside of the building and the air exhaust port facing a room of the building. Furthermore, the counter-flow heat exchanger comprises a second plurality of intake air flow channels in air communication with the air exhaust port facing the outside of the building and the air intake port facing a room of the building.

The counter-flow heat exchanger is adapted such that one individual channel of the first plurality of intake air flow channels is, at least along a portion of the individual channel, in intimate contact with at least one individual channel of the second plurality of intake air flow channels, such that heat from the air stream flowing through the first plurality of intake air flow channels can be transferred to the air stream flowing through the second plurality of intake air flow channels. The reverse situation is also possible.

The ventilation unit also comprises a first air-filter unit for filtering the air entering the air intake port facing the outside of the building, and situated upstream to the counter-flow heat exchanger.

The advantage of an air-filter unit upstream to the counter-flow heat exchanger is that the first plurality of intake air flow channels will not clog by any particles carried with the air entering the air intake port facing the outside of the building.

In the present context, the terms “upstream” and “downstream” are to be understood as in relation to the air stream flowing through the system. As an example, an airstream that enters the air intake port facing the outside of the building and continues its flow through the first air-filter unit, then enters the counter-flow heat exchanger via the first plurality of intake air flow channels, and finally exits the air exhaust port facing a room of the building. Here, the first air-filter unit is situated upstream to the air exhaust port facing a room of the building; and the air exhaust port facing a room of the building is situated downstream to the first air-filter unit.

The ventilation unit comprises a second air-filter unit for filtering the air entering the air intake port facing a room of the building, and situated upstream to the counterflow heat exchanger. The advantage of an air-filter unit upstream to the counter-flow heat exchanger is that the second plurality of intake air flow channels will not clog by any particles carried with the air entering the air intake port facing a room of the building.

The general advantage of using a counter-flow heat exchanger compared to other heat exchangers is that it provides fresh air and improved climate control, while saving energy by reducing the need for further heating sources inside the building.

The first and second air-filter unit may be of the same type or may be of different types.

a) The first air-filter unit for filtering the air entering the air intake port facing the outside of the building comprises: - an enclosure with an inlet adapted for receiving an air stream to be filtered from the air intake port facing the outside of the building, and for passing on a filtered air stream through an outlet to the plurality of intake air flow channels in air communication with the air exhaust port facing a room of the building; - a supply unit for supplying a filter material; - a filter support frame positioned within the enclosure and mounted to the enclosure so as to outline the inlet; - a take-up reel for advancing filter material; - a filter material on said supply unit, extending from said supply unit, and around at least a part of the filter support frame to the take-up reel; wherein the filter support frame extends from the inlet and into the enclosure; wherein the filter support frame comprises a distal end from the inlet, a proximal end from the inlet, and a body part; and/or b) The second air-filter unit for filtering the air entering the air intake port facing a room of the building comprises: - an enclosure with an inlet adapted for receiving an air stream to be filtered from the air intake port facing a room of the building, and for passing on a filtered air stream through an outlet to the plurality of intake air flow channels in air communication with the air exhaust port facing the outside of the building; - a supply unit for supplying a filter material; - a filter support frame positioned within the enclosure and mounted to the enclosure so as to outline the inlet; - a take-up reel for advancing filter material; - a filter material on said supply unit, extending from said supply unit, and around at least a part of the filter support frame to the take-up reel; wherein the filter support frame extends from the inlet and into the enclosure; wherein the filter support frame comprises a distal end from the inlet, a proximal end from the inlet, and a body part.

By installing an air-filter unit according to the above in the system, the air-stream entering into the building can be filtered in an energy efficient manner, since the air-stream passes through an increased filter surface area compared to the conventional systems with air filters mounted perpendicular to the inlet, and hence the air-stream. The increased filter surface area reduces the energy needed to force the air-stream through the filter.

Another advantage with using the air-filter unit in the system of the present invention is that the air-filter unit allows for an automatic exchange of filter material - thereby reducing the need for system service.

In one or more embodiments, the filter material extends from the supply unit and around at least a part of the body part of the filter support frame to the take-up reel.

In one or more embodiments, the distal end of the filter support frame is impermeable to the airstreams. This is advantageous because the air stream is then directed through the filter material that is situated around the body of the filter support frame.

In one or more embodiments, the body part of the filter support frame is tubular. The tubular shape increases the surface area of filter material around the filter support frame, and furthermore facilitates the drawing/sliding of the filter material over the body part of the filter support frame, when replacement is needed due to contamination or clogging/choking.

In a preferred embodiment, the body part has an essentially circular cross-section to further improve the sliding effect. The cross-section is in the same plane as the filter material is drawn over the body part during replacement. An essentially circular cross-section is to be understood as also covering an oval cross-section. The oval cross-section is especially good for situations where there is little space for installation of the system. This shape allows for a thinner system where the surface area of the support frame is retained.

In one embodiment, the body part has a circular cross-section to further improve the sliding effect.

It may be difficult to obtain full coverage of filter material around the filter support frame, when the filter material extends from the supply unit and around at least a part of the filter support frame to the take-up reel.

In one or more embodiments, the air-filter unit further comprises a guide unit arranged for guiding the filter material around the body part of the filter support frame. Such a unit reduces the risk of air stream leaving the support frame unfiltered. In one embodiment, the guide unit is in the form of an air sluice chamber. In one embodiment, the guide unit is a part of the filter support frame.

In one or more embodiments, the air-filter unit further comprises a drive-motor for operating the take-up reel.

In one or more embodiments, the air-filter unit further comprises a drive-motor control unit configured to control the frequency and length of filter material advancement by activation/deactivation of the drive-motor.

In one or more embodiments, the drive-motor control unit is configured to receive information about the energy consumption of the ventilation system, and wherein the energy consumption exceeds a predetermined level, the drive-motor control unit is configured to activate the drive-motor. This is advantageous because the energy consumption of the ventilation system (especially the energy consumption of the fans) is an indicator of how well the air filter functions. The more contaminated or clogging/choked that the filter is the more energy is needed to force the air-stream through the filter.

In another embodiment, the support frame is arranged to form individual channels spanning the length from the proximal end to the distal end. This allows the air-stream to be guided across the entire surface area of the filter material.

In one embodiment, the filter material is in the form of a filter bag assembly comprising a plurality of filter bags.

The individual filter bag has an open end and a closed end, and the filter bag assembly is mounted such that the open end of the individual filter bag is facing the filter support frame when in contact therewith. This is to allow the air-stream to flow through the support frame and into the individual filter bags to further increase the surface area of the filter system. The filter bags may be rolled up on the supply system, and will only expand when coming into contact with, i.e. being rolled on or slided over the support frame, where the air-stream is flowing through.

In one embodiment, the individual filter bags have at least four sidewalls of filter material extending from an open end of the filter bag assembly to a closed end of the filter bag assembly, wherein the sidewalls connect to close the filter bag assembly, two of the sidewalls of filter material being opposed to each other across the filter bag and being spaced from each other at the open end of the filter bag assembly.

In one or more embodiments, the ventilation unit further comprises a reservoir for collecting condensed water. The reservoir is situated upstream to the counter-flow heat exchanger, and is adapted to collect condensed water from the second plurality of intake air flow channels in air communication with the air exhaust port facing the outside of the building. It is a general problem that water in gas form in the warm airstream will condense as liquid (condensed) water in the second plurality of intake air flow channels as the airstream is cooled. The cooler airstream cannot hold as much water in gas form. The reservoir may be equipped with an indicator, that signals when the reservoir needs to be emptied, and may also be adapted to turn off the ventilation unit until the reservoir is emptied.

In one or more embodiments, the reservoir for collecting condensed water comprises a porous mass, such as a natural or synthetic sponge. The porous mass will absorb the condensed water from the second plurality of intake air flow channels via capillary attraction. At times where the airstream from the air intake port facing a room of the building is relatively dry, the airstream will, when passing the wetted porous mass, release some of the water to the airstream, thereby emptying the reservoir.

In one or more embodiments, the ventilation unit further comprises a heat exchanging unit, such as a radiator or a convector, situated downstream to the plurality of intake air flow channels in air communication with the air intake port facing the outside of the building, and situated upstream to the air exhaust port facing a room of the building; the heat exchanging unit being adapted for cooling/heating the airstream received from the second plurality of intake air flow channels in air communication with the air intake port facing the outside of the building.

In one or more embodiments, the ventilation system further comprises a controller for controlling the flow of air through the system in response to input data.

In one or more embodiments, the ventilation unit further comprises a controller for controlling the flow of air through the system in response to input data.

In one or more embodiments, the ventilation unit further comprises means for measuring the air flow through the first plurality of intake air flow channels.

In one or more embodiments, the ventilation unit further comprises means for measuring the air flow through the second plurality of intake air flow channels.

In one or more embodiments, the ventilation unit further comprises means for measuring the air flow between the first plurality of intake air flow channels and the air exhaust port facing the outside of the building.

In one or more embodiments, the ventilation unit further comprises means for measuring the air flow between the second plurality of intake air flow channels and the air exhaust port facing a room of the building.

In one or more embodiments, the controller, in response to air flow input data, regulates the fan speed of the supply air fan and/or the exhaust air fan. This is advantageous because the energy consumption per unit airstream flow can be held constant. This is a parameter that is regulated by authorities in many countries.

In one or more embodiments, the controller is configured to receive information about the energy consumption of the ventilation system, and wherein the energy consumption exceeds a predetermined level, the controller is configured to activate the drive-motor. This is advantageous because the energy consumption of the ventilation system (especially the energy consumption of the fans) is an indicator of how well the air filter functions. The more contaminated or clogging/choked that the filter is the more energy is needed to force the air-stream through the filter.

In one or more embodiments, the supply air fan is situated downstream to the first plurality of intake air flow channels in air communication with the air exhaust port facing a room of the building.

In one or more embodiments, the exhaust air fan is situated downstream to the second plurality of intake air flow channels in air communication with the air exhaust port facing the outside of the building.

Brief description of the figures

Figure 1 shows a vertical cross section through the part of a building fagade where the window is situated and the relative position of a ventilation unit according to the invention;

Figure 2 shows a system in accordance with various embodiments of the invention;

Figure 3 shows a front view of a building fagade where the outer face of the air exhaust port and the air intake port of the invention is shown below the window; and

Figure 4 shows an air-filter unit in accordance with various embodiments of the invention; and

Figure 5 shows a filter bag assembly in accordance with various embodiments of the invention.

Detailed description of the invention

Figure 1 shows a vertical cross section through the part of a building fagade where the window 100 is situated and the relative position of a ventilation unit 200 according to the invention. A preferred position of the air exhaust port 320 and the air intake port 420 facing the room of the building is shown.

Figure 2 shows a system in accordance with various embodiments of the invention. The ventilation unit 200 comprises a supply air fan 300 in air communication with both an air intake port 310 facing the outside of the building and an air exhaust port 320 facing a room of the building.

The ventilation unit 200 also comprises an exhaust air fan 400 in air communication with both an air exhaust port 410 facing the outside of the building and an air intake port 420 facing a room of the building.

Both the supply air fan 300 and the exhaust air fan 400 are situated downstream to a counter-flow heat exchanger 500 comprising a first plurality of intake air flow channels 510 in air communication with the air intake port 310 facing the outside of the building and the air exhaust port 320 facing a room of the building; and a second plurality of intake air flow channels 520 in air communication with the air exhaust port 410 facing the outside of the building and the air intake port 420 facing a room of the building. The downstream position of the fans is advantageous because it evens the flow distribution across all the intake air flow channels. If the fans were positioned upstream to the counter-flow heat exchanger 500, the airstream would be pushed unevenly through the intake air flow channels.

The ventilation unit 200 also comprises a first air-filter unit 600 for filtering the air entering the air intake port 310 facing the outside of the building, and situated upstream to the counter-flow heat exchanger 500; and a second air-filter unit 700 for filtering the air entering the air intake port 420 facing a room of the building, and situated upstream to the counter-flow heat exchanger 500.

It is preferred that the air-filter units 600, 700 are identical, although especially adapted for fitting at their individual sites within the ventilation unit 200, with a filter support frame especially constructed so as to provide an increased surface area of filter material available for filtering an air-stream compared to conventional filters. As seen from figure 4, the air-filter units 600, 700 comprises an enclosure 601, 701, either, for air-filter unit 600, adapted for receiving an air stream to be filtered from the air intake port 310 facing the outside of the building, and for passing on a filtered air stream through an outlet 604 to the plurality of intake air flow channels 510 in air communication with the air exhaust port 320 facing a room of the building; or for air-filter unit 700, adapted for receiving an air stream to be filtered from the air intake port 420 facing a room of the building, and for passing on a filtered air stream through an outlet 704 to the plurality of intake air flow channels 520 in air communication with the air exhaust port 410 facing the outside of the building.

The air-filter units 600, 700 further comprise a supply unit 608, 708 for supplying a filter material 603, 703; a filter support frame 606, 706 positioned within the enclosure 601,701 and mounted to the enclosure so as to outline the inlet 602, 702; and a take-up reel 610, 710 for advancing filter material 603, 703.

The filter material 603, 703 on the supply unit 608, 708 extends from said supply unit 608, 708, and around the filter support frame 606, 706 to the take-up reel 610, 710. A small part of the filter support frame is not covered by filter material, since different parts of the filter will have to pass each other to move around the support frame. The part not covered by filter material is minimized by a support frame 618, 718 arranged for guiding the filter material around the body part 616, 716 of the filter support frame 606, 707.

The filter support frame extends from the inlet 602, 702 and into the enclosure 601, 701.

The filter support frame 606, 706 comprises a distal end 612, 712 from the inlet 602, 702, a proximal end 614, 714 from the inlet 602, 702, and a body part 616, 716. The distal end 612, 712 of the filter support frame 606, 706 is impermeable to the airstreams. The body part 616, 716 of the filter support frame 606, 706 is tubular and has an essentially circular cross-section.

The preferred embodiment as disclosed in Figure 4 also comprises a drive-motor 617, 717 for operating the take-up reel 610, 710, and a drive-motor control unit 618, 718 configured to control the frequency and length of filter material advancement by activation/deactivation of the drive-motor 617, 717. The drive-motor control unit 620, 720 may also be configured to receive information from a ventilation system about the energy consumption, and wherein the energy consumption exceeds a predetermined level, the drive-motor control unit 620, 720 may be configured to activate the drive-motor 617,717.

The ventilation unit 200 further comprises a reservoir 800 for collecting condensed water. The reservoir is situated upstream to the counter-flow heat exchanger 500, and is adapted to collect condensed water from the second plurality of intake air flow channels 520 in air communication with the air exhaust port 410 facing the outside of the building.

The ventilation unit 200 further comprises a heat exchanging unit 900, such as a radiator or a convector, situated downstream to the plurality of intake air flow channels 520 in air communication with the air intake port 310 facing the outside of the building, and situated upstream to the air exhaust port 320 facing a room of the building, the heat exchanging unit 900 being adapted for cooling/heating the airstream received from the second plurality of intake air flow channels 520 in air communication with the air intake port 310 facing the outside of the building.

Figure 5 shows a preferred filter bag assembly. The filter material 603, 703 is in the form of a filter bag assembly 622, 722 comprising a plurality of filter bags 624, 724. The individual filter bag 624, 724 has an open end 626, 726 and a closed end 628, 728 and the bag assembly 622, 722 is mounted such that the open end 626, 726 of the individual filter bag 624, 724 is facing the filter support frame 606, 706 when in contact therewith.

The ventilation system and/or ventilation unit further comprises a controller 950 for controlling the flow of air through the system in response to input data. In Figure 2, the controller 950 is positioned within the ventilation unit 200.

The ventilation system and/or ventilation unit further comprises means 990 for measuring the air flow between the first plurality of intake air flow channels 510 and the air exhaust port 410 facing the outside of the building. In Figure 2, the means 990 is positioned within the ventilation unit 200.

The ventilation system and/or ventilation unit further comprises means 970 for measuring the air flow between the second plurality of intake air flow channels 520 and the air exhaust port 320 facing a room of the building.

The controller 950, in response to air flow input data, regulates the fan speed of the supply air fan 300 and/or the exhaust air fan 400. This is advantageous because the energy consumption per unit airstream flow can be held constant. This is a parameter that is regulated by authorities in many countries.

The controller 950 is configured to receive information about the energy consumption of the ventilation system, and wherein the energy consumption exceeds a predetermined level, the controller 950 is configured to activate the drive-motor 617, 717. This is advantageous because the energy consumption of the ventilation system (especially the energy consumption of the fans) is an indicator of how well the air filter 603, 703 functions. The more contaminated or clogging/choked that the air filter is the more energy is needed to force the air-stream through the filter.

Figure 3 shows a front view of a building fagade where the outer face of the air exhaust port (410) and the air intake port (310) of the invention is shown below the window. This is the preferred position of both the air exhaust port and the air intake port.

References 100 Window 200 Ventilation unit 300 Supply air fan 310 Air intake port facing the outside of the building 320 Air exhaust port facing a room of the building 400 Exhaust air fan 410 Air exhaust port facing the outside of the building 420 Air intake port facing a room of the building 500 Counter-flow heat exchanger 510 Intake air flow channel 520 Intake air flow channel 600 First air-filter unit 601 Enclosure 602 Inlet 603 Filter material 604 Outlet 606 Filter support frame 608 Supply unit 610 Take-up real 612 Distal end 614 Proximal end 616 Body part 617 Drive motor 618 Guide unit 620 Drive motor control unit 622 Filter bag assembly 624 Individual filter bag 626 Open end 628 Closed end 700 Second air-filter unit 701 Enclosure 702 Inlet 703 Filter material 704 Outlet 706 Filter support frame 708 Supply unit 710 Take-up real 712 Distal end 714 Proximal end 716 Body part 717 Drive motor 718 Guide unit 720 Drive motor control unit 722 Filter bag assembly 724 Individual filter bag 726 Open end 728 Closed end 800 Collecting means 900 Heat exchanging unit 950 Controller 970 Means for measuring the air flow between the second plurality of intake air flow channels and the air exhaust port facing a room of the building 990 Means for measuring the air flow between the first plurality of intake air flow channels and the air exhaust port facing the outside of the building

Claims (7)

1. Ventilationssystem tis rum i bygninger, ventilationssystemet omfattende en ventilationsenhed (200) velegnet til montering I et område onder et vmdue i rummet, ventilationsenheden {200} omfattende; ~ en luftindblæsnfngweniilator (300) I? luftførbindeis© med an luftindtagsåbrarig <310>, der vender ud mod ydersiden af bygningen, og an luftait^ksåhnirig (320), der vante ind mod et rum i bygningen; - art luftudbiæsningsventiialdr >(40Cr i luftforbindelse mad en lyiaftræksébttlrig (410). der vender ud mod ydersiden af bygningen o# an fyftihdtaisåbning (420), der vender ind mod ét rum s bygningen; - en modstrømsvarrneveksler (500) omfattende en førsta flerhed af luftindfagskanaier {510} i luftforbindelse med luftindtagsåbningen (310), der vender ud mod ydersiden af bygningen og i u haft r asks åbningen (320), der vender ind mod et rum i bygningen; og en anden flerhed af lufiindtagskanaler (520) i iuffforbindeise med luftaftræksåbningen (410), der vender ud mod ydersiden af bygningen, og luftindtagsåbningen (420), der vender ind mod ét mm I bygningen; - en forste iuftfilterenhed (500) til filtrering af luften, der kommer ind gennem iufundiagsåbningen (310), der vender ud mod ydersiden af bygningen, øg placeret for modstrsmsyaifneyeksleren (500); og - en ariden luftfifterenhed (700) til filtrering af luften, der kommer ind gennem luftlteagsåbningeo (420), der vender pd mod et rum i bygningen, og placeret opstrøms for moterømsvarme veksleren (500); kendetegnet ved, at a) den første iuftfilterenhed (500) ti« filtrering af luften, der kommer ind gennem luftindtagsåbningen (310), der vender ipd trod ydersiden af bygningen omfattet;: - et hus (601) med et indløb (602) tilpasset til at modtage én luftstrøm, som skal filtreres, fra luftindtagsåbningen (310), der vender ud mod ydersiden af bygningen, og til at sende en filtreret, luftstrøm videre gennem et udløb (504) fil flerheden af Iuftindtagskanaler {510}.. f luftforbindeise med iuftaftræksåbningen (320), der vender ind mod et rum i bygningen) - en forsyningsenhed (508) tilforsyning af filtermateriale (603); - et fiiterstativ {606} placeret inde i huset (601) og monteret på Huset for at Indramme indløbet (602); - en trækspole (610) til fremføring af filtemiåterlale (603); - et filtermaieriale {603} på nævnte forsyningsenhed (606), der strikker sis fra nævnte forsyningsenhed (606), og rundt ® i det mindste; en del af tlfterstatlvsi (606) til trækspolen (610); hvor flfterstativei strækker sig fra Indløbet (602) og ind i huset (601); hvor fslterstativei (606) omfatter en distal ende (612) fra indløbet (602), en proximal ende (614) fra Indløbet (602), og en hovedlegemesdel (616); og/eller b) den anden luftriiterenhed (700) tit filtrering af den luft, der kommer ind gennem luftindtagsåbningen (420), der vender ind mod et rum i bygningen, omfatter; - et hus (701) med et indløb {702} tilpasset tii atmodtap en luSsfrøm, som skal filtreres, fra luftindtagsåbningen (420), der vender Ind med et rum i bygningen, og tii at sende en filtreret luftstrøm videre gennem et aftræk (704) ti flerheden af iuÉndtagskanater (520) i luftforbindeise med luftahræksåbnlhgén (410), der vender ud mod ydersiden af bygningen; ~ en torsyningsenhed (70S) til forsyning af filtermafenale (703); - et fiéfstatlv {706} placeret inde I huset (701) og monteret på huset for it forme indløbet (702): - en trækspole (710) til fremføring af filiermaferiaie (703); - et filtermateriale (703) på nævnte forsyningsenhed (708), der strækker sig fra nævnte forsyningsenhed (70S),, og rundt om i det mindste en del af filterstativet (706} tii trækspolen (710); hvor filterstativet strækker sig fra indløbet (702) og ind i huset (701): hvor ftfcersiativet (706) omfatter m distal ende (712) fra Indløbet (702), en proximal ende (714) fra indløbet (702), og en hovedSegemesdel (716);1. Ventilation system for rooms in buildings, the ventilation system comprising a ventilation unit (200) suitable for installation In an area underneath a heating duct in the room, the ventilation unit {200} comprising; ~ an air blower ventilator (300) I? air conduit ice © with an air intake area <310> facing the outside of the building, and an air intake unit (320) accustomed to a room in the building; - type of air vent valve (40Cr in air connection with a vent extractor (410) facing the exterior of the building and a fifth room opening (420) facing one room's building; - a countercurrent heat exchanger (500) comprising a front flow exchanger (500)) air intake ducts {510} in air communication with the air intake opening (310) facing the outside of the building and having the opening (320) facing a space in the building; and a second plurality of air intake ducts (520) the air vent opening (410) facing the outside of the building and the air intake opening (420) facing one mm into the building; - a first air filter unit (500) for filtering the air entering through the air vent opening (310); facing the exterior of the building, an increase positioned for the resistive air exchanger (500), and - an arid air fan unit (700) for filtering the air entering through the air vent orifice (420), which there towards a room in the building, and located upstream of the engine room heat exchanger (500); characterized in that (a) the first air filter unit (500) comprises filtering the air entering through the air intake opening (310) facing ipd despite the exterior of the building: - a housing (601) with an inlet (602) adapted to receive one air stream to be filtered from the air inlet opening (310) facing the outside of the building, and to pass a filtered air stream through an outlet (504) file the plurality of air intake ducts {510}. with the air extraction opening (320) facing a room in the building) - a supply unit (508) supplying filter material (603); - a fixture rack {606} located inside the housing (601) and mounted on the housing to frame the inlet (602); - a tensioning spool (610) for advancing filament return (603); - a filter material {603} on said supply unit (606) knitting sis from said supply unit (606), and at least ®; a portion of the impeller (606) for the tow coil (610); wherein the flange tripod extends from the inlet (602) and into the housing (601); wherein the filter base (606) comprises a distal end (612) from the inlet (602), a proximal end (614) from the inlet (602), and a main body portion (616); and / or b) comprising the second air riser unit (700) for filtering the air entering through the air intake opening (420) which faces into a space in the building; - a housing (701) having an inlet {702} adapted to counterfeit a vent stream to be filtered from the air intake opening (420) which enters a space in the building, and to pass a filtered air stream through a vent (704) (10) the plurality of extraction ducts (520) in air connection with air opening (410) facing the outside of the building; a torsion unit (70S) for supplying filter mafenale (703); - a fixture plate {706} located inside the housing (701) and mounted on the housing for the IT molding inlet (702): - a pull coil (710) for advancing filament furniture (703); - a filter material (703) on said supply unit (708) extending from said supply unit (70S), and around at least a portion of the filter stand (706} to the draw coil (710), the filter frame extending from the inlet ( 702) and into the housing (701): wherein the front (706) comprises a distal end (712) from the inlet (702), a proximal end (714) from the inlet (702), and a main segment portion (716); 2, Ventilationssystem ifølge krav 1, hvor ventilationsenheden (200) endvidere omfatter én beholder (800) til opsamling af kondensvand, placeret opstrøms før mødstrsmsvarrneveksleren .(500), og tilpasset til opsamling af kondensvand fra flerheden af luftindtagskanaler (620} i luftforbindelse med iuftmdtagsåbningen (410), der vender ud mod ydersiden af bygningen,2, Ventilation system according to claim 1, wherein the ventilation unit (200) further comprises one container (800) for collecting condensation water, located upstream of the condensate heat exchanger (500), and adapted for collecting condensation water from the plurality of air intake ducts (620} in air connection with the air inlet (410) facing the outside of the building, 3. Ventilationssystem ifølge krav 2, hvor beholderen (SQG| til opsamling af kondensvand omfatter m porøs masse, såsom en naturlig eller syntetisk svamp,Ventilation system according to claim 2, wherein the container (SQG | for collecting condensate water comprises a porous mass such as a natural or synthetic sponge 4. Vénfliaffonssystem Ifølge ethvert sf kravene 1 til 3, hvor den første og/elier anden iuftfilterenhed (600, 700) endvidere omfatter en styreenhed (618, 718) anbragt til at: lede Itermateriaiet rendt om hovedlegemesdelen (818, 716) af iferstativei (806, 708).4. Airflow system according to any of claims 1 to 3, wherein the first and / or second air filter unit (600, 700) further comprises a control unit (618, 718) arranged to: guide the Iterate material directed around the main body portion (818, 716) of the 806, 708). 5. Ventilationssystem ifølge krav 4, hvor den fønste og/elier anden lufffiiterenhed (600, 700} endvidere omfatter en kontrolenhed (820, 720) til en drivmctor konfigureret ti! af kontrollere hyppigheden og længden af filterm aterlalefremdriften ved aktive ri ng/ci ea kis verl ng af drivmotoren (817, 717),Ventilation system according to claim 4, wherein the detected and / or other airflow unit (600, 700) further comprises a control unit (820, 720) for a driver configured to control the frequency and length of the filter material operation at active travel. extending the drive motor (817, 717), 6. Ventilationssystem ifølge krav 5, hvor driv-motorens kontrolenhed (620, 720} er konfigureret til at modtage Information fra et ventilationssystem om energfofbruget, og hvor energiforbruget overstiger et forudbestemt niveau, pr dnymøtorens kontrolenhed (820, 720) konfigureret il at aktivere drivmotoren (817, :717),Ventilation system according to claim 5, wherein the drive motor control unit (620, 720} is configured to receive Information from a ventilation system about the energy consumption, and wherein the energy consumption exceeds a predetermined level, per the driver's control unit (820, 720) configured to activate the drive motor. (817,: 717), 7. Ventilationssystem ifølge ethvert af kravene 1 fil 6, hvor filtermaienalet (603, 783) er i form af en samling af fslterposer (622, 722) omfattende en flerhed af filterposer (624, 724); hvor den enkelte fliterpose (62^ 724) her en aben ende (626, 726) og en lukket ende (628, 728); hvor samlingen af filterposer (522, 722) er monteret således, at den åbne ende (628, 726) af den enkelte fliterpose (824, 724) vender ud mod nlterstativet (606, 706), når den er i kontakt dermed, S) Veotilaflonssysfem ifølge ethvert af kravene 1 til 7, hvor ventilationsenheden (200¾ endvidere omfatter en vamsevekslerenhed (S00) placeret nedstrsms for flerheden af iuftirsdtagskanalerne (510) i luftforbindelse med lL!ftiridla|Såfeningen (310). der vender iid mod ydersiden af bygningen, og 'tjiaderel Opsi8SaiS for iuftaftræksåhntngén (320), der vender ind mod et rum i bygningen, varmevekslerenheden (iQ0) er indrettet SI at kaie/varme luftstrømmen fra den anden flerhed sfltiÉiEiåagdkanafér i tuftindfagsåbningen (310), der vender ud mod ydersiden af byøntngmVentilation system according to any one of claims 1 file 6, wherein the filter maize number (603, 783) is in the form of a collection of filter bags (622, 722) comprising a plurality of filter bags (624, 724); wherein the single flutter bag (62 ^ 724) here has an open end (626, 726) and a closed end (628, 728); wherein the assembly of filter bags (522, 722) is mounted such that the open end (628, 726) of the individual flutter bag (824, 724) faces the support rack (606, 706) when in contact therewith, S) Veotilaflon system according to any one of claims 1 to 7, wherein the ventilation unit (200¾ further comprises a heat exchanger unit (S00) located downstream of the plurality of air ducts (510) in air communication with the llfiridla | the soap ring (310) facing the outside and the outside of the building. The open air extraction vent (320) facing a room in the building, the heat exchanger unit (iQ0) is arranged to mop / heat the air flow from the second plurality of air ducts in the outside vent opening (310) facing the outside