NO345856B1 - Air purifying device - Google Patents
Air purifying device Download PDFInfo
- Publication number
- NO345856B1 NO345856B1 NO20190732A NO20190732A NO345856B1 NO 345856 B1 NO345856 B1 NO 345856B1 NO 20190732 A NO20190732 A NO 20190732A NO 20190732 A NO20190732 A NO 20190732A NO 345856 B1 NO345856 B1 NO 345856B1
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- Prior art keywords
- air
- low noise
- fan
- purifying device
- air purifying
- Prior art date
Links
- 239000011888 foil Substances 0.000 claims description 46
- 238000009987 spinning Methods 0.000 claims description 10
- 238000009298 carbon filtering Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000007787 solid Substances 0.000 claims description 4
- 241000237858 Gastropoda Species 0.000 claims description 3
- 230000001815 facial effect Effects 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 2
- 238000001914 filtration Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000035699 permeability Effects 0.000 description 5
- 239000002245 particle Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000009429 electrical wiring Methods 0.000 description 2
- 239000004744 fabric Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 230000005465 channeling Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000004883 computer application Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/52—Particle separators, e.g. dust precipitators, using filters embodying folded corrugated or wound sheet material
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/0328—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air
- F24F1/035—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing with means for purifying supplied air characterised by the mounting or arrangement of filters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/02—Self-contained room units for air-conditioning, i.e. with all apparatus for treatment installed in a common casing
- F24F1/04—Arrangements for portability
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- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Electrostatic Separation (AREA)
Description
The present invention relates to air purifying device for domestic homes and the likes.
Air purifiers has traditionally been used to combat smell and smoke, pollen and dust, in homes, public rooms and offices. A major drawback in existing technology is noise emission. Neither axial fans nor blowers are capable of delivering high pressure at the air flow rates recommended for normal sized living rooms (+300 m3/h) without significant noise emission, without increasing the product size to impractical large measures and hence high related costs. High Clean Air Delivery Rate (CADR) from small neat products also results in unnecessary high power consumption.
All the existing fan realizations suffer from noise arising from turbulence around the impeller blades, except one technique where the filter/filters themselves are spinning and air is partly centrifuged through the filter by the related pressure field. Typically these purifiers has to be installed in large rooms with high ceiling due to a significant draught caused by air being thrown tangentially out of the spinning fan/filter. The annoying drought arise when the high tangential flow separates from the symmetrically spinning field resulting in high momentum advection through the room. At hot weather, draught are often welcome even in private homes, but under normal temperatures these air purifiers has to be arranged in a remote position to people with limited popularity as a conseq uence.
In EP 1027129 B1 it is shown air filters incorporating filtering media and a centrifugal fan, the centrifugal fan preferably being attachable to the rotor plate of a common ceiling fan.
In CN 109595706A describes a noise-reduced air purifier comprising a rotating fan unit with a radial fan attached in a longitudinal direction and rotating around a longitudinal center axis by means of a motor where the fan blade provides an axial fan shape at an air intake and a radial fan shape at an air outlet and a filter are mounted radially on the outside of the radial fan
It is a goal of the present invention to provide an air fan/filtering unit also for use in domestic homes, either as a ceiling mounted device or as a device arranged for being placed on a table/floor, and solving all or some of the problems described above by reducing the secondary effects caused by tangential air speeds.
It is provided a low noise emitting air purifying device.
It is in a first embodiment of the invention provided an air filtering unit for ceiling mount, preferably at a light/electrical connection point/outlet. The unique design of the filtering unit allows higher air flow than traditional air fan flow, but with significantly less noise and less tangential air movement out of the fan/filter unit. Thus enabling a purifying capacity of equal or higher than comparable air fan/filter units also for the sub micro particles.
In further embodiments of the invention it is provided air fan/filtering units constructed for being arranged at tables or placed on the floor. Such devices face additional challenges, in that the rotating elements of the air filter device must be shielded from the environment. Such devices with shielding comprising unique features for partially or completely removal of operation noise are provided. The traditional problem related to tangential movement of air out of the units often prohibit the devices to be arranged in the vicinity of people, due to the draught becoming unacceptable strong One embodiment according to the present invention comprise a casing holding a horizontally mounted fan/filter unit, and that directs the air stream partially or completely vertically upwards.
Common to all embodiments is that unwanted draught and noise is reduced without making tradeoffs like increasing size or reducing throughput.
Alternative embodiments of the invention comprise additional features such as carbon filtering, ionizing, light, heating, scent addition, humidification, loudspeakers and others.
Key feature of the various embodiments of the present invention comprise a low noise emitting air purifying device assembly which is arranged on the downstream side of the filters, utilizing a low noise air directing device jet effect that will throw the air in a backward direction relative the spinning direction of the fan/filter. The low noise air directing device jet effect helps the motor propelling the rotating assembly hence reducing the power consumption and eliminating a portion of the resistance against the spinning of the assembly.
Additional features and advantages of the present invention are described in, and will be apparent from, the following brief description of the figures and the following detailed description, wherein:
Fig, 1 – Ceiling fan assembly, side view
Fig. 2 – Ceiling fan assembly, oblique view from below
Fig. 3 – Ceiling fan assembly, cross section oblique view from above
Fig. 4 – Ceiling fan assembly, cross section side view
Fig. 5 – Ceiling fan assembly, view from below
Fig. 6 – Ceiling fan assembly, cross section, exploded view
Fig. 7 – Ceiling fan assembly, cross section, partially exploded view
Fig. 8 - Table fan assembly, side view
Fig. 9 – Table fan assembly, view from above
Fig. 10 - Table fan assembly, cross section side view
Fig. 11 - Table fan assembly, cross section oblique view from above
Fig. 12A – Table fan assembly exploded view, longitudinal formed outer foils
Fig. 12B – Table fan assembly exploded view, concentric cylinder shaped solid cover Fig. 13A – Floor fan assembly principle, longitudinal formed outer foils
Fig. 13B – Floor fan assembly principle, air director mesh
Fig. 14A-B - air director mesh, inside
Fig. 15A-C - air director mesh, outside
Fig. 16A-B – Caps embodiment and cross section side view
Fig. 16A-B – Helmet embodiment cross section side views
In the following description the use of specific terms shall be interpreted widely and at least in the meaning as defined in the following:
CMH: Cubic Meter per Hour
CADR: Clean Air Delivery Rate, typically 3 values are measured: Smoke, pollen and dust. CADR is normally measured according to the ANSI/AHAM AC-1 standard, giving a value of the fraction volume of a standard 28,5 M3 room that is filtered to remove all particles of either smoke, pollen or dust in the particular fraction multiplied by the flow throughput. In other words, the rate of delivered cleaned air.
Air: The device of the invention is primarily adaptable to be used for air filtering, but the device and system may be used in any type of gaseous environment. When the term “air” is used in this document, it shall be understood to comprise the meaning of any type of gas.
Now the present invention will be described in more detail, with references to the figures where appropriate.
Figure 1 to 7 illustrates a first embodiment of the present invention, wherein the ceiling mounted air fan/filter assembly 1 comprising a rotating fan assembly consisting of at least a set of circularly mounted fan blades 3 each mounted in a longitudinal direction 100 providing an axial fan shape at an intake section (40) and a radial fan shape at the exit section(41), and when the fan/filter assembly rotates (20) around a longitudinal center axis 38, it is a spinner of the entering air.
The air flow generated by the fan blade 3 is distributed along the inside of a filter 4 comprised in the air fan/filter assembly 1. The filter 4 may be formed as a circular concentric sleeve of for example a pleated shaped filter media, mounted outside the circle of longitudinal fan blades 3. Other filter materials may be used. The filter 4 is rotationally mounted to the fan blades 3, and rotates around the longitudinal center axis 38 together with the fan blades 3.
The fan blades 3 may be shaped to meet the entering air flow 10 with matching foil angle and to pre-spin the air to exert radial pressure to the filter 4. The air is partly pushed by the blades 3 and partly pulled into the inner duct 13 by the suction generated by the rotating filter 4 and outer frame 2. The figures illustrate an embodiment wherein the air is pulled into the fan/filter assembly 1 only from the underside, and the top side of the fan/filter assembly 1 is closed by a circularly formed end cap 36. It should be understood that in a different embodiment, the end cap may be air permeable, formed as a mesh, or a plate, or other, comprising openings to let air through in a similar way, and wherein the fan blades 3 are formed to propel air from both longitudinal openings of the fan/filter assembly 1, from below and from above, when the fan/filter assembly 1 is rotating. The fan blade assembly may comprise one or more armor rings 34 providing an even distance between the blades 3.
The air fan/filter assembly 1 further comprise a set of longitudinal formed outer foils 2 arranged around the filter 4 and fan blades 3. The outer foils 2 being rotationally connected to the filter 4 and the fan blades 3, and arranged to have a generally tangential direction relative the outside of the filter 4, wherein an inner side edge 50 are arranged closer to the outside of the filter 4, and an outer side edge 51 being arranged to lie radially outside the inner side edge 50 of the neighbor outer foil 2 in the opposite spinning direction 20. The inflow area/distance 52 defined by the area between all the inner side edges 50 of the outer foils 2 are larger than the outflow area defined by the area/distance 53 between all the outer side edges 51 of the outer foils 2, and thus create a plurality of low noise air directing devices, wherein the outflow area form a type of outlet nozzle 53.
The outer foils 2 may be hinged to a frame 35, 39, 39’, and the nozzle openings 53 may be changed by altering the foil 2 direction relative the outside of the filter 4, and thereby altering the outflow areas. The changing of the angle of the outer foils may be continuous, or according to a set of predefined angles, and the changing of the angle may be provided by a manually operated arrangement or an automatic or remotely operated arrangement.
The outer foils 2 assembly may comprise one or more foil armor rings 35 for maintenance of the outer foils 2 form and the distance between them.
The outer foils 2 assembly distance between them may be provided in a non-periodical pattern which may enhance noise reduction further.
When the air fan/filter assembly 1 rotates air flow 10 is pulled into the inner duct 13 of the air fan/filter assembly 1 from the below (optionally from both below and above), and the energy imposed on the air flow by the fan blades 3, is partly used to push the air through 11 the filter, and partly to increase the air flow speed through 12 the low noise air directing device outlet openings of the outer foils 2. The air is thus thrown out of the air fan/filter assembly 1 in the opposite direction of the spinning direction 20 of the air fan/filter assembly 1.
The effect of the low noise air directing device jet generating outer foils 2 is that all or a portion of the tangential air flow speed exiting from the filter 4 is eliminated, thus draught and noise is also eliminated/reduced.
The present invention can provide the same Clean Air Delivery Rate , CADR, with a smaller product size (diameter) and less power consumption than compared with prior art devices. The result is that highly effective pollen and dust filtering may be provided for domestic homes with limited ceiling height.
Without a static exit grille and the noise related to air passing such openings, the roof embodiment of the present invention open for use of lower grade, higher permeability filters, enabling to shift a much higher volume of pollen cleaned air without adding noise. For the table and floor embodiments, higher permeability through the filter 4 will further eliminate noise components as the velocity of the reverse jets are increased. Hence, the tangential velocity and in turn the exit velocity through the exit vents are reduced.
In one embodiment of the present invention, the outer foils 2 may be arranged slightly diagonal (not shown) to the longitudinal direction 100, in order to divert the air flow upwards or downward. In an even further embodiment the outer foils 2 may be designed in a fishbone pattern out from an “equator”-level 101 (not shown) and in that manner throw air upward from the upper half portion of the outer fouls 2, and downwards from the lower half portion of the outer foils 2.
In a further embodiment of present invention, the outer foils may alter between two or more positions/orientations such that the air flow when exiting the air fan/filter assembly 1 may be altered.
The position/orientation may be dynamically changeable by mechanical manual switch, remotely controlled, or automatically changing.
In an even further embodiment the outer foils 2 may alter its position/orientation/angle between different mode of operations such as for example between: a position providing a first tangential air velocity by the -jet effect, and a position providing a second lower tangential air velocity. In a further embodiment it is possible to provide a plurality of positions. In the latter mode of operation it would be possible to operate the air fan/filter assembly 1 in a way imitating a traditional ceiling fan.
In yet a further embodiment of the present invention it is provided outer foils 2 designed in various patterns to enable a multitude of various exiting air flow patterns, and in this way using the customized low noise air directing effect to meet custom needs related to sir flow pattern exiting the air fan/filter assembly 1.
In an even further embodiment the low noise air directing device of the outer foils 2 may be substituted by a concentric cylinder shaped solid cover 124, 125 comprising a plurality of jet nozzles 150, as illustrated in figures 12B, 14A and B, and figure 15A, 15B and 15C. Figure 14 A and 14B illustrates one embodiment of a section of such concentric cylinder material seen from the inside 125, the side facing the filter where the air stream is lead into 151 the nozzles 150, and figure 15A, 15B and 15C illustrates a similar example embodiment section from the outside 124 where the air flow jets out 152 of the jet nozzles 150. Figure 12B illustrates the concentric cylinder shaped cover 124, 125 arranged in a table version air fan/filter assembly 80 as described below, but the concentric cylinder shaped cover 124, 125 may also be implemented both in the ceiling mounted air fan/filter assembly 1 described above and the floor mounted air fan/filter assembly 131 described below.
Further it may be provided a ceiling bracket 30 for mounting the air fan/filter assembly 1 to a ceiling connection point comprising: electrical wiring for providing the motor and controller with power, controller, communication module and connectors 31, and a motor 32 provided with a motor axle 33 for driving and controlling the air fan/filter assembly 1.
The connection between the fan blades 3, the filter 4, and the outer foils 2 may be provided by a circular end collar 37 in the bottom end of the air fan/filter assembly 1, and/or the end cap 36 in the top end of the air fan/filter assembly 1.
Figure 6 and figure 7 illustrates the air fan/filter assembly 1 in two versions of exploded views. Under maintenance as shown in figure 7 it may be possible to remove the filter 4 by dismounting the circular end collar 37 and then pull the filter out of the air fan/filter assembly 1. A new filter may be inserted and the circular end collar 37 reattached. The fan blades and outer foils are attached to the end cap 36.
Figure 8 to 12 illustrates an embodiment of the present invention in a table version air fan/filter assembly 80. The same principles as above apply, with the addition of an optional mesh 121 arranged around the air fan/filter assembly 80. for protection of accidental contact between the spinning outer foils and a person/animal. An air permeable fabric/cover 122 may additionally be arranged outside the mesh 121. Center cones 102 is provided for additional channeling of air stream when input from both above and below. Motor 32 may be arranged in the stand 105, as well as other components for control an, power and cabling (not shown).
Figure 11 illustrates how the air stream 11 flows through the filter 4, and the rest pressure of the air is channeled through the low noise air directing device jet generating outer concentric device 2, 124, 125, and is thrown in a direction 12 opposite to the rotating direction of the fan/filter assembly 80. The direction of the exit air 12 is illustrated with the arrowhead 22 symbol for movement towards the reader opposite the rotating direction 20.
In yet a further embodiment the table version air fan/filter assembly 80 may be provided as a free hanging device from the ceiling, hanging for example in a power cord, or a line (battery powered).
A bottom cap 123 and a top cap 123’ is provided statically arranged to protect the underside as well as the top side of the air fan/filter assembly 80. The bottom cap 123 and a top cap 123’ comprise in its inner portion a mesh covered opening corresponding in diameter to the inner diameter of the filter 4. The bottom cap 123 and a top cap 123’ inner portion lets the air flow into the air fan/filter assembly 80. the mesh covers openings may also comprise a highly air permeable filter (not shown) for avoiding larger size dust particles to be blown into the filter 4 of the air fan/filter assembly 80. The bottom cap 123 and a top cap 123’ is connected to the stand 105, the bottom cap 123 directly, and the top cap 123’ via the mesh 121/sleeve 122 and the bottom cap 123.
The mesh 121 may be designed with only non-vertical mesh elements, as vertical elements have a louder noise pattern when a horizontal airstream passes through the mesh 121. Diagonal mesh elements will have lower noise pattern.
The mesh 121 and sleeve are statically connected to the stand 105.
It is also within the scope of the invention to provide a protection mesh 121, as described for the table version, also on the ceiling mounted air fan/filter assembly 1.
Figure 13A, illustrates a principle sketch for a floor mounted casing 130 wherein the air fan/filter assembly 131 is only partially shown. A snail house like collector channel 132 is arranged around the air fan/filter assembly 131 to collect the air stream from the low noise air directing formed outer foils, and lead the air stream towards an opening in the top of the casing 130. The top opening 137 comprise air directing foils 133 to direct the air flow for example directly upwards.
In a further embodiment the floor mounted casing 130 may be partially or fully covered by a high permeability fabric or cover (not shown) to prevent any accidental items to come into the air outlets 136, 137.
The floor mounted casing 130 is provided in two embodiments, one with above defined fan/filter assembly 1 as described in figure 13A, and one wherein the fan/filter assembly 1 is provided without the outer low noise air directing device jet, but with an air director mesh 135 to reduce the output velocity of the fan/filter assembly as described in figure 13B.
The an air director mesh 135 arranged between the casing 130 and the rotating assembly 131 will reduce the tangential velocity, wherein the air director mesh 135 is designed for optimal even throughput over the air director mesh 135. By choosing a fine mesh it is possible to dampen the noise generating turbulence and at the same time reduce the tangential velocity. In other words: Present invention is balancing the normal and the tangential permeability by the mesh size and form to avoid noise generating turbulence when air stream passes the air director mesh 135 threading.
The permeability of the air director mesh 135 is balanced such that the radial flow throughput is evenly distributed over the desired exit opening 136, 137.
The reduce exit velocity gives significantly decrease potential noise from turbulence, which in turn provides freedom to the design of the exit grille 133, 136 such that the shape/form can be chosen according to desired design criteria of the casing. The balanced air director mesh for even distribution of air partially conserves the local velocity direction.
In a further embodiment of the floor mounted assembly, the air fan/filter assembly 131 may be provided without the outer foils 2. Such version may throw the air in a vertical upward direction, and since the draught or inconvenience effects may be ignored provided a device able to purify a higher volume of air. The casing 130 and directing foils 133 controls the exiting air flow form the air fan/filter assembly 131.
The floor mounted air fan/filter assembly 131 comprise a fan having an axial fan which provides an operation mode of a radial fan. A unique feature with present invention is that the filter 4 is mounted around the fan/impeller 3 being rotational connected. The air fan/filter assembly 131 may further comprise a filter/mesh module covering the air intake orifice 134 in order to catch larger dust particles.
The floor mounted air fan/filter assembly 131 may have an air intake orifice 134 on both sides of the fan, similarly to the table version air fan/filter assembly 80, and thus optionally be provided with two filter/mesh modules covering each air intake orifices 134.
The filter/mesh module may comprise a self-cleaning function.
Common for all the above described embodiments is the possibilities to combine one or more of additional features such as: carbon filtering, ionizing, light, heating, scent addition, humidification, loudspeakers and others.
Carbon filtering may for example be incorporated with the filter 4 in a sandwich type arrangement, such that the carbon filter rotates with the filter 4.
Lighting may be an additional feature, which when implemented with the ceiling mounted low noise emitting air purifying device according to the invention may be provided with a socket for lighting device. The socket may be arranged on the top- or bottom-side of the motor 32, and may use same power source/supply as the motor 32.
All embodiments of the present invention may comprise one or more of: electrical wiring for providing the motor and controller with power, controller, communication module and connectors 31, and a motor 32. Controller and communication module may communicate with a remote device either over a wired or a wireless communication channel. The remote device may be one of or similarly to: simple physical switch, Smart phone APP, cloud service and cloud connected computer application, Wireless communication any be any type of communication protocol, including Wi-Fi and Bluetooth.
In an even further embodiment a very narrow implementation of the present invention is arranged in a headgear, such as a helmet, caps, protection hood or the like to provide a constant stream of purified air towards the facial area of the parson wearing the headgear. The air may be delivered concentrated without or very low noise. One example of such implementation is illustrated in figure 16.
The present invention can also be described as a first device embodiment of a low noise emitting air purifying device comprising:
a rotating fan assembly 1, 80, 131 comprising:
a radial fan, the radial fan comprising a plurality of fan blades 3 rotating around a longitudinal center axis 38, wherein the fan blades 3 are mounted in a longitudinal direction 100 providing an axial fan shape at an intake section 40 and a radial fan shape at the exit section 41, a filter 4 mounted radially outside the radial fan, wherein the filter 4 is rotationally connected to the radial fan, and
the low noise emitting air purifying device further comprising:
a low noise air directing device arranged peripherally to the fan assembly, and
a motor 32 for rotating the fan assembly in a rotating direction 20.
A second device embodiment of the low noise emitting air purifying device according to the first device embodiment, wherein the air directing device direct the airflow with a directional distribution to provide optimal flow distribution.
A third device embodiment of the low noise emitting air purifying device according to the first or second device embodiment, wherein the air directing device is rotationally connected to the fan assembly 1, 80, 131.
A fourth device embodiment of the low noise emitting air purifying device according to any one of the first to third device embodiment, wherein the air directing device comprising: nozzle openings 53, 150 for providing air jet flow 12 in a direction opposite to the rotating direction 20 of the rotating fan assembly 1, 80, 131 to reduce power consumption and exit air velocity.
A fifth device embodiment of the low noise emitting air purifying device according to the fourth device embodiment, wherein the nozzle openings 53, 150 are provided with a nonperiodical pattern.
A sixth device embodiment of the low noise emitting air purifying device according to any one of the first to fifth device embodiment, wherein the air directing device comprising:
a plurality of longitudinal formed outer foils 2 arranged around the filter 4 and fan blades 3, wherein the outer foils are arranged to direct the airflow out of the air purifying device in a defined pattern, and
the outer foils 2 are rotational connected to the rotating fan assembly 1, 80, 131.
A seventh device embodiment of the low noise emitting air purifying device according to the sixth device embodiment, wherein the outer foils 2 are hinged to a frame 35, 39, 39’, and the nozzle openings 53 may be altered between two or more outflow areas.
An eighth device embodiment of the low noise emitting air purifying device according to the seventh device embodiment, wherein the changing of the angle of the outer foils 2 is continuous, and the changing of the angle may be provided by a manually operated arrangement, or an automatic, or a remotely operated arrangement.
A ninth device embodiment of the low noise emitting air purifying device according to the fourth or fifth device embodiment, wherein the air directing device comprising a concentric cylinder shaped solid cover 124, 125 having nozzle openings 150 for providing the air jet flow 152 having a direction 12 opposite to the rotating direction 20 of the rotating fan assembly 1, 80, 131.
A tenth device embodiment of the low noise emitting air purifying device according to any one of the first to ninth device embodiment, further comprising a ceiling bracket 30 for mounting the air fan/filter assembly 1 to a ceiling connection point.
An eleventh device embodiment of the low noise emitting air purifying device according to any one of the first to ninth device embodiment, further comprising a stand 105 for arranging the air fan/filter assembly 80 on a table.
An twelfth device embodiment of the low noise emitting air purifying device according to any one of the first to ninth device embodiment, comprising:
a floor mounted casing 130 having a front side 138 and a back side 139, wherein at least one of the front side 138 and the back side 139 comprise an air intake orifice 134, two sides 141, 142, a bottom side 143 and a top side 144, wherein
the top side 144 comprising an opening 137, and the floor mounted casing 130 further comprise a collector channel 132 wherein the rotating fan assembly 131 is horizontally mounted.
A thirteenth device embodiment of the low noise emitting air purifying device according to the twelfth device embodiment, wherein the collector channel 132 having a snail house like design and being arranged around the rotating fan assembly 131 to collect the air stream from the rotating fan assembly 131 and lead the air stream towards the opening 137 in the top side 144 of the casing 130, and
the top side 144 comprising air directing foils 133 arranged to direct the air flow, for example directly upwards.
An fourteenth device embodiment of the low noise emitting air purifying device according to any one of the first to second device embodiment, comprising:
a floor mounted casing 130 having a front side 138 and a back side 139, wherein at least one of the front side 138 and the back side 139 comprise an air intake orifice 134, two sides 141, 142, a bottom side 143 and a top side 144, wherein the top side 144 comprising an opening 137, and
the floor mounted casing 130 further comprise a collector channel 132 wherein the rotating fan assembly 131 is horizontally mounted.
A fifteenth device embodiment of the low noise emitting air purifying device according to the fourteenth device embodiment, wherein the side 141, 142 being arranged upstream relative the top side 14 in the spinning direction 20 of the rotating fan assembly 131 comprising air outlets 136.
A sixteenth device embodiment of the low noise emitting air purifying device according to any one of the fourteenth to fifteenth device embodiment, further comprising one or more air director mesh 135 arranged between the casing 130 and the rotating assembly 131 for the radial flow throughput to be evenly distributed over the desired exit openings 136, 137.
A seventeenth device embodiment of the low noise emitting air purifying device according to any one of the fourteenth to sixteenth device embodiment, wherein
the top side 144 comprising air directing foils 133 arranged to direct the air flow, for example directly upwards.
A eighteenth device embodiment of the low noise emitting air purifying device according to any one of the first to seventeenth device embodiment, further comprising one or more of carbon filtering, ionizing, light, heating, scent addition, humidification, and loudspeaker.
A nineteenth device embodiment of the low noise emitting air purifying device according to any one of the first to ninth and twelfth to eighteenth device embodiment, wherein the low noise emitting air purifying device is arranged in a headgear to send purified air towards the facial area of a person wearing the headgear.
Claims (18)
1. Low noise emitting air purifying device comprising:
a rotating fan assembly (1, 80, 131) comprising:
a radial fan, the radial fan comprising a plurality of fan blades (3) rotating around a longitudinal center axis (38), c h a r a c t e r i z e d b y
the fan blades (3) are mounted in a longitudinal direction (100) providing an axial fan blade shape at an intake section (40) and a radial fan blade shape at an exit section (41) such that the fan blades (3) is shaped to meet the entering air flow (10) with matching foil angle and to pre-spin the air to exert radial pressure to the filter (4), a filter (4) mounted radially outside the radial fan, wherein the filter (4) is rotationally connected to the radial fan, and
the low noise emitting air purifying device further comprising:
a low noise air directing device arranged peripherally to the fan assembly, and a motor (32) for rotating the fan assembly in a rotating direction (20) wherein the air directing device is rotationally connected to the fan assembly (1, 80, 131).
2. Low noise emitting air purifying device according to claim 1, wherein the air directing device direct the airflow with a directional distribution to provide optimal flow distribution.
3. Low noise emitting air purifying device according to any one of claim 1 to 2, wherein the air directing device comprising: nozzle openings (53, 150) for providing air jet flow (12) in a direction opposite to the rotating direction (20) of the rotating fan assembly (1, 80, 131) to reduce power consumption and exit air velocity.
4. Low noise emitting air purifying device according to claim 3, wherein the nozzle openings (53, 150) are provided with a non-periodical pattern.
5. Low noise emitting air purifying device according to any one of claim 1 to 4, wherein the air directing device comprising:
a plurality of longitudinal formed outer foils (2) arranged around the filter (4) and fan blades (3), wherein the outer foils are arranged to direct the airflow out of the air purifying device in a defined pattern, and
the outer foils (2) are rotational connected to the rotating fan assembly (1, 80, 131).
6. Low noise emitting air purifying device according to claim5, wherein the outer foils (2) are hinged to a frame (35, 39, 39’), and the nozzle openings (53) may be altered between two or more outflow areas.
7. Low noise emitting air purifying device according to claim 6, wherein the changing of the angle of the outer foils (2) is continuous, and the changing of the angle may be provided by a manually operated arrangement, or an automatic, or a remotely operated arrangement.
8. Low noise emitting air purifying device according to claim 3 or 4, wherein the air directing device comprising a concentric cylinder shaped solid cover (124, 125) having nozzle openings (150) for providing the air jet flow (152) having a direction (12)opposite to the rotating direction (20) of the rotating fan assembly (1, 80, 131).
9. Low noise emitting air purifying device according to any one of claim 1 to 8, further comprising a ceiling bracket (30) for mounting the air fan/filter assembly (1) to a ceiling connection point.
10. Low noise emitting air purifying device according to any one of claim 1 to 8, further comprising a stand (105) for arranging the air fan/filter assembly (80) on a table.
11. Low noise emitting air purifying device according to any one of claim 1 to 8, comprising:
a floor mounted casing (130) having a front side (138) and a back side (139), wherein at least one of the front side (138) and the back side (139) comprise an air intake orifice (134), two sides (141, 142), a bottom side (143) and a top side (144), wherein the top side (144) comprising an opening (137), and the floor mounted casing (130) further comprise a collector channel (132) wherein the rotating fan assembly (131) is horizontally mounted.
.
12. Low noise emitting air purifying device according to claim 11, wherein the collector channel (132) having a snail house like design and being arranged around the rotating fan assembly (131) to collect the air stream from the rotating fan assembly (131) and lead the air stream towards the opening (137) in the top side (144) of the casing (130), and
the top side (144) comprising air directing foils (133) arranged to direct the air flow, for example directly upwards.
13. Low noise emitting air purifying device according to any one of claim 1 to 2, comprising:
a floor mounted casing (130) having a front side (138) and a back side (139), wherein at least one of the front side (138) and the back side (139) comprise an air intake orifice (134), two sides (141, 142), a bottom side (143) and a top side (144), wherein the top side (144) comprising an opening (137), and
the floor mounted casing (130) further comprise a collector channel (132) wherein the rotating fan assembly (131) is horizontally mounted.
14. Low noise emitting air purifying device according to claim 13, wherein
the side (141, 142) being arranged upstream relative the top side (14) in the spinning direction (20) of the rotating fan assembly (131) comprising air outlets (136).
15. Low noise emitting air purifying device according to claim 13 or 14, further comprising one or more air director mesh (135) arranged between the casing (130) and the rotating assembly (131) for the radial flow throughput to be evenly distributed over the desired exit openings (136, 137).
16. Low noise emitting air purifying device according to any one of claim 13 to 15, wherein the top side (144) comprising air directing foils (133) arranged to direct the air flow, for example directly upwards.
17. Low noise emitting air purifying device according to any one of claim 1 to 16, further comprising one or more of carbon filtering, ionizing, light, heating, scent addition, humidification, and loudspeaker.
18. Low noise emitting air purifying device according to any one of claim 1 to 8 and 11 to 17, wherein the low noise emitting air purifying device is arranged in a headgear (160) to send purified air towards the facial area of a person wearing the headgear.
Priority Applications (14)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20190732A NO345856B1 (en) | 2019-06-14 | 2019-06-14 | Air purifying device |
| NO20191358A NO345512B1 (en) | 2019-02-22 | 2019-11-15 | Method, device and system for air filtering and purifying |
| CN202080015868.2A CN113453782A (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| KR1020217030354A KR20210126757A (en) | 2019-02-22 | 2020-02-21 | air filter device |
| JP2021547694A JP2022520637A (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| PCT/NO2020/050047 WO2020171718A1 (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| BR112021016471A BR112021016471A2 (en) | 2019-02-22 | 2020-02-21 | air filter device |
| US17/432,865 US20220090820A1 (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| AU2020226138A AU2020226138A1 (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| EP20759716.2A EP3930873A4 (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| CA3131087A CA3131087A1 (en) | 2019-02-22 | 2020-02-21 | Air filter device |
| NO20200240A NO345778B1 (en) | 2019-06-14 | 2020-02-27 | An air purifying device for cleaning air of virus dust, pollen and the like |
| PCT/NO2020/050158 WO2020251372A1 (en) | 2019-06-14 | 2020-06-12 | A head-mounted wearable air-purifying device comprising a motorized rotating filter |
| ZA2021/06913A ZA202106913B (en) | 2019-02-22 | 2021-09-17 | Air filter device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NO20190732A NO345856B1 (en) | 2019-06-14 | 2019-06-14 | Air purifying device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| NO20190732A1 NO20190732A1 (en) | 2020-12-15 |
| NO345856B1 true NO345856B1 (en) | 2021-09-13 |
Family
ID=74186319
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20190732A NO345856B1 (en) | 2019-02-22 | 2019-06-14 | Air purifying device |
| NO20200240A NO345778B1 (en) | 2019-06-14 | 2020-02-27 | An air purifying device for cleaning air of virus dust, pollen and the like |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| NO20200240A NO345778B1 (en) | 2019-06-14 | 2020-02-27 | An air purifying device for cleaning air of virus dust, pollen and the like |
Country Status (1)
| Country | Link |
|---|---|
| NO (2) | NO345856B1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| NO345778B1 (en) | 2021-08-02 |
| NO20200240A1 (en) | 2020-12-15 |
| NO20190732A1 (en) | 2020-12-15 |
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