RU2574431C2 - Air filter - Google Patents

Air filter Download PDF

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Publication number
RU2574431C2
RU2574431C2 RU2013150601/05A RU2013150601A RU2574431C2 RU 2574431 C2 RU2574431 C2 RU 2574431C2 RU 2013150601/05 A RU2013150601/05 A RU 2013150601/05A RU 2013150601 A RU2013150601 A RU 2013150601A RU 2574431 C2 RU2574431 C2 RU 2574431C2
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RU
Russia
Prior art keywords
filter
air
air filter
ventilation pipe
hole
Prior art date
Application number
RU2013150601/05A
Other languages
Russian (ru)
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RU2013150601A (en
Inventor
Сеппо ВАРТИАЙНЕН
Original Assignee
Евен Ой
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to FI20115385A priority Critical patent/FI123461B/en
Priority to FI20115385 priority
Application filed by Евен Ой filed Critical Евен Ой
Priority to PCT/FI2012/050176 priority patent/WO2012143600A1/en
Publication of RU2013150601A publication Critical patent/RU2013150601A/en
Application granted granted Critical
Publication of RU2574431C2 publication Critical patent/RU2574431C2/en

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Abstract

FIELD: process engineering.
SUBSTANCE: invention relates to air filter for air conditioning system. Air filter (1) comprises disc-shape filtering element (2) with drive assembly (3), preferably, motor connected with filtering element to run the latter. Filtering element (2) is configured to be communicated with vent pipeline (4) so that it is located outside the vent pipeline opening (4a) at the first distance (s) therefrom and concentrically with said vent pipeline. Air cleaned by the air filter is forced into vent pipeline via said opening. Claimed filter comprises also the circular bead (5) located outside the vent pipeline opening (4a) at second distance (k) therefrom and concentrically with vent pipeline. Said bead (4) expands toward the opening (4a). Preferable, said bead (5) is shaped to truncated cone.
EFFECT: efficient cleaning, simple design.
8 cl, 2 dwg

Description

FIELD OF THE INVENTION
The invention relates to an improved air filter according to the restrictive part of paragraph 1 of the claims.
State of the art
From the previously published European patent application EP 2275187, the author of which is the present applicant, there is known an air filter designed for an air conditioning system and comprising a disk filter element and a drive unit, preferably an electric motor, which is connected to the filter element to ensure its rotation. The filter element is connected to the ventilation pipe, in particular mounted outside the opening of the ventilation pipe, at a distance from it and concentrically with the ventilation pipe. Air enters the ventilation pipe through the air filter and the specified hole.
The problem with the air filter is that the rotating filter element returns the main part of the contaminants into the air, thus causing them to circulate, for example, in the air of the room.
One solution to this problem is to install a collecting tank near the air filter, in particular as described in the aforementioned European patent application. This makes it possible to collect and remove liquid droplet-like contaminants with the help of a collection tank, however, small solid particles swirl in the air flows of the collection tank and filter element and again propagate in the room air. In the worst case, at least part of the openings of the filter element are clogged with small particles of contaminants.
Disclosure of invention
The objective of the invention is to eliminate the disadvantages associated, in particular, with the above air filter. Another object of the invention is the provision of a new and improved air filter, with which the air supplied to the ventilation system can be effectively cleaned of fine particulate matter.
The improved air filter according to the invention is characterized by the features presented in paragraph 1 of the claims. Preferred embodiments of the invention are presented in the dependent claims.
The invention relates to an air filter, which is designed for an air conditioning system and contains a disk filter element and a drive unit, preferably an electric motor, which is connected to the filter element to ensure its rotation, while the specified filter element is installed relative to the ventilation pipe so that it located outside the opening of the ventilation pipe at a first distance from it, concentrically with the ventilation pipe, while the specified ventilation pipe through the holes enters the air cleaned by the air filter. According to the invention, the air filter also contains an annular flange, which is located outside the opening of the ventilation pipe at a second distance from it, concentrically with the ventilation pipe.
In a first preferred embodiment of the invention, one end of the shoulder has a diameter that is equal to or greater than the diameter of the ventilation pipe, in particular than the diameter of the hole.
In a second preferred embodiment of the invention, the bead is made expandable in the direction of the hole.
In a third preferred embodiment, the bead is in the shape of a truncated cone.
In a fourth preferred embodiment of the invention, the first distance is greater than the second distance, with the filter element mounted inside a shoulder limited area / space.
An advantage of the invention is the effective removal of particulate matter, in particular dust, from the exhaust air. The invention is particularly effective in the case of a high content of contaminants, while the air filter is not clogged with contaminants. Instead, they can be diverted from the filter element along with the air flow in the radial direction through the gap between the shoulder and the ventilation pipe.
Another advantage of the invention lies in the fact that the filter element can be made of any breathable filter material.
Another advantage of the invention is the ease of cleaning the air filter.
The advantage of the invention is also a simple and lightweight construction.
Brief Description of the Drawings
The following is a more detailed description of the invention and its advantages with reference to the accompanying drawings, which show:
FIG. 1 is a partial cross-sectional view of an air filter according to the invention, which is connected to a ventilation duct, and
FIG. 2 is a partial cross-sectional front view of the air filter of FIG. one.
Identical parts are indicated by the same reference numbers in the drawings.
The implementation of the invention
A preferred air filter for an air conditioning system is shown in FIG. 1. The air filter 1 contains a disk filter element 2 and a drive unit 3, which is connected to the filter element 2 to ensure its rotation. The filter element 2 is installed in connection with the ventilation pipe 4. In this embodiment, the filter element 2 is made in the form of a perforated plate 20.
In the embodiment shown in FIG. 1, the drive unit 3, preferably an electric motor 31, has a rotary shaft 32 that is attached to the central part of the disk filter element 2, in particular a round perforated plate 20. The drive unit 3, the perforated plate 20, and thus the entire air filter 1 by means of fasteners 10 are attached to the ventilation duct 4, preferably on the central axis AA of the ventilation duct. In this case, the air filter is installed concentrically with the ventilation pipe 4.
The filter element 2 of the air filter 1, in particular the perforated plate 20, is connected to the ventilation pipe 4, in this case it is connected to the hole 4a or to the outlet of the ventilation pipe, while the filter element is located outside the hole 4a at a small distance s from it so that the space or gap 41 defined by the first distance s is at the same time located between the edge 4b of the outlet 4a and the wall w or a similar surface. In this illustrative embodiment, air must be vented from the room using exhaust duct 4.
In one preferred embodiment, the air filter 1 comprises fasteners 7 including a first fastening sleeve or tube 71, in the center of which, using the corresponding levers 72, in particular four levers having a 90 degree shift relative to each other, a second fastening sleeve or tube is attached 73, inside which the drive unit 3 is mounted and fixed, in particular an electric motor 31. The first mounting sleeve 71 has a diameter that allows it to be located inside the ventilation pipe 4 and shove the inner wall of the ventilation duct 4, to which it may be fixedly attached (and detached and released, respectively). In the plane perpendicular to the central axis A-A of the ventilation pipe 4 and the air flow direction, the levers 72 have a relatively small surface area and do not oppose the flow, therefore, the aerodynamic drag created by the levers for air flow in the pipeline is low. Obviously, other known methods of using fasteners 7 can also be used.
In addition, the air filter 1 according to the invention comprises an annular collar 5. The collar 5 is located outside of the opening 4a of the ventilation pipe 4 at a second distance k from the opening 4a, or from the plane of the opening, or wall, or some other structure. Thus, between the shoulder 5 and the hole 4a of the ventilation pipe 4, in particular the edge 4b of the hole, an annular gap 6 is formed, the width of which is equal to the specified second distance k. The shoulder 5 is installed in the ventilation pipe 4 concentrically, in particular with respect to the hole 4a and, therefore, the filter element 2; 20. Therefore, the ventilation pipe 4, in particular its opening, has a central axis A-A coinciding with the perpendicular central axis of both the filter element 2, in particular the perforated plate 20, and the shoulder 5.
The bead 5 has a free space 50 inside from the central axis A-A to the bead itself. Through this space 50 and the rotating filter element 2; 20, air passes from the air filter 1 into the ventilation pipe 4 through its opening 4a and at the same time through the gap 6. Rotating filter element 2; 20 is installed in the space formed by the shoulder 5 and the hole 4a.
In a preferred embodiment, the shoulder 5 is made expandable from the first end 51 to the second end 52 in the direction of the ventilation pipe 4, in particular in the direction of the hole 4a. The first end 51 of the shoulder 5 has a diameter h1 smaller than the diameter b2 of the second end 52. The second end 52 of the shoulder 5 is located close to the opening 4a of the ventilation pipe, i.e. at a second distance k from the hole 4a or from a plane tangent to the hole 4a. Accordingly, the first end 51 of the shoulder 5 is removed from the hole 4a by a distance that is the sum of the width of the shoulder le and the second distance k. In this case, between the second end 52 of the shoulder and the hole 5a of the ventilation pipe or between the corresponding plane and the edge 4b of the hole, an annular gap 6 is formed, the width of which is equal to the specified second distance k.
In a preferred embodiment, the second end 52 of the shoulder 5 has a diameter h2 equal to or greater than the diameter b of the ventilation pipe 4, in particular the diameter of the hole 4a. This makes it possible to obtain an annular gap 6 around the periphery of the hole 4a, i.e. along the edge of the hole 4b and outside the hole, while the tangential air flow generated by the rotating filter element will undoubtedly be directed to the exit of the ventilation pipe 4, in particular from the hole 4a.
In a preferred embodiment, the bead 5 is in the shape of a truncated cone.
In a most preferred embodiment, the filter element 2; 20 and flange 5 are located relative to each other so that the distance from the filter element 2; 20 to the hole 4a, i.e. the first distance s was greater than the distance from the shoulder to the hole 4a, i.e. than the second distance k. As a result of this, the filter element 2; 20 is located in a space 50 defined by a shoulder 5, i.e. inside shoulder 5.
In principle, the air filter 1 operates as follows. The filter element 2, in particular the perforated plate 20, is driven by a drive unit 3, in particular an electric motor 31, at high speed, for example, 500-3000 rpm, while in the case of a simultaneously operating ventilation system, air passes through the holes of the filter element 2 into the ventilation pipe 4, and at the same time, air through the gap 6 leaves the air filter. Airborne contaminants, such as particles, collide with the edges of the openings 23 of the rotating filter element 2 or with an air cushion created by the rotating filter element. The air bag created by the rotating filter element consists of a tangential air stream tv (see FIG. 2), with which the impurities under the action of centrifugal force radially move to the periphery 22 of the filter element 2 and are discarded through the gap 6 from the filter element. Since the tangential air flow that occurs when the filter element 2, in particular the perforated plate 20 rotates, near the periphery of the filter element 2 or within the space 41, is more powerful than the bypass stream iv created by the suction of exhaust air in this particular area, the result there will be a sealing stream in the peripheral region of the rotating filter element 2, preventing the bypass flow of untreated air through the gap 41 into the exhaust air duct d 4. Thus, it is not allowed to get contaminants behind the filter element 2; 20 and into the ventilation duct 4. On the other hand, contaminants - at least a part of them - adhere to the filter element and accumulate on it, therefore, they must be periodically removed.
As for the air flow entering through the hole in the first end 51 of the shoulder 5, the part of the total air flow passing through the gap 6 is about 5-20%, while the remaining 95-80% pass through the filter element 2; 20 and in purified form move through the ventilation pipe 4.
Flange 5 affects the tangential air flow tv of the rotating filter element 2; 20. Using the shoulder 5, the air flow tv and contaminants contained therein, for example, solid and light particles, are removed from the air filter 1 through an annular gap 6 between the shoulder and the building surface, in particular the surface of the wall or roof, which coincides with the opening 4a .
Since the filter element 2; 20 is located in a space 50 defined by a shoulder 5, i.e. inside the shoulder 5, the tangential air flow generated by the rotating filter element 2; 20, and contaminants, possibly contained therein, are directed by the shoulder 5 into the annular gap 6 and then removed from the air filter 1.
In the above embodiments, it is important to prevent small particles of contaminants, such as particles of particle size class 0.1-10 microns, from entering the ventilation duct. In accordance with this, the air filter 1 is installed, for example, in the air intake at the inlet of the air duct outside the building, it is important to efficiently and immediately remove impurities in the immediate vicinity of the air filter. It should be noted that even with a high content of particles, such as dust particles, the air filter will not become clogged, since the particles have a well-defined exit path from the air filter through the annular gap 6, for example, to the outer space. In addition, the air flow exiting through the gap 6 from the air filter is strong and therefore carries away light and solid particles, preferably far away from the air filter. If the air filter is a closed unit, it is prone to clogging with a large number of particles.
In an alternative preferred embodiment of the invention, the annular gap 6 is connected to the corresponding collector channel, which, in turn, is connected to a particle collector or similar particle trap. The collector channel may comprise, for example, an annular channel located around the gap 6, and an additional channel connected to the annular channel and including a particle collector, which is most preferably simple to replace and / or clean.
In a preferred embodiment, the perforated plate 20 is a rectilinear panel 21 of constant thickness. Its periphery 22 is round and provided with holes 23. The perforated plate has holes 23, most preferably located on the panel 21 in an area 231 that is bounded by radii R, r (see Fig. 2), while the radius R is less than the radius a / 2 panels (a = diameter of perforated plate). The first radius is, for example, about 70-90% of the panel diameter, and the second radius, for example, 10-20% of the panel diameter.
In a preferred embodiment, the perforated plate 20 is made of metal, in particular stainless steel sheet. Alternatively, the perforated plate may be made, for example, from an aluminum sheet. It should be noted that other commonly used metals and / or metal alloys can also be used. In addition, it should be noted that other solid, preferably flexible, materials, in particular plastics such as acrylic and polycarbonate, can also be used to make the perforated plate.
In general, the perforated plate 20 forming the filter element 2 can be used in various ways. The shape, size, number and location of the holes in the perforated plate 20 may vary, as well as the ratio of the diameters of the perforated plate and the holes, depending on the specific application. Various configurations of a perforated plate are described in European patent application EP 2275187, the author of which is the present applicant.
In a preferred embodiment, the disk filter element 2 is made of breathable rigid material. Permeability to air is ensured by the presence of small structural holes in the material, i.e. holes, which have a diameter in the range of, for example, from 10 μm to 10 mm, while the number of holes is sufficient so as not to create a large pressure difference between the sides of the filter element during operation of the air filter. Examples of materials for the filter element are, in particular, a dense metal or plastic mesh and filter cloth or the like.
The invention is not limited only to the above examples of embodiments, on the contrary, there are many possible modifications within the concept of the invention, which is defined by the claims.

Claims (8)

1. An air filter (1) intended for an air conditioning system, comprising a disk filter element (2; 20) and a drive unit (3), preferably an electric motor, which is connected to the filter element to ensure its rotation, wherein said filter element installed in conjunction with the ventilation pipe (4) so that the filter element (2) is located outside the hole (4a) of the ventilation pipe (4) at a first distance (s) from it and concentrically with the ventilation pipe, at the same time, air (A), cleaned by an air filter, enters the specified ventilation pipe through the hole, characterized in that the air filter also contains an annular flange (5), which is located outside the ventilation pipe hole (4a) at a second distance (k) from it and concentric with the ventilation pipe (4).
2. The air filter according to claim 1, characterized in that the second end (52) of the flange (5) has a diameter (h2) that is equal to or greater than the diameter (a) of the ventilation pipe (4), in particular than the diameter of the hole (4a).
3. The air filter according to claim 1, characterized in that the collar (5) is made expanding in the direction of the hole (4a).
4. The air filter according to claim 1, characterized in that the collar (5) has the shape of a truncated cone.
5. The air filter according to claim 1, characterized in that the first distance (s) is greater than the second distance (k), while the filter element (2; 20) is located in a space (50) bounded by a shoulder (5).
6. The air filter according to one of the preceding paragraphs, characterized in that the disk filter element (2) is a perforated plate (20), which is a rectilinear panel with a constant thickness.
7. An air filter according to claim 6, characterized in that the perforated plate (20) is made of metal, preferably of steel sheet.
8. The air filter according to one of p. 1-5, characterized in that the disk filter element (2) is made of breathable rigid material.
RU2013150601/05A 2011-04-20 2012-02-22 Air filter RU2574431C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
FI20115385A FI123461B (en) 2011-04-20 2011-04-20 Air Filter
FI20115385 2011-04-20
PCT/FI2012/050176 WO2012143600A1 (en) 2011-04-20 2012-02-22 Improved air filter

Publications (2)

Publication Number Publication Date
RU2013150601A RU2013150601A (en) 2015-05-27
RU2574431C2 true RU2574431C2 (en) 2016-02-10

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU655407A1 (en) * 1977-10-28 1979-04-05 Институт Металлургии И Обогащения Ан Казахской Сср Apparatus for cleaning gases from dispersed particles
SU1278547A2 (en) * 1984-04-29 1986-12-23 Центральный Научно-Исследовательский И Проектно-Конструкторский Институт По Проектированию Оборудования Для Целлюлозно-Бумажной Промышленности Conditioner
RU2011403C1 (en) * 1992-03-26 1994-04-30 Савенков Николай Владимирович Filter
CN101865482A (en) * 2009-04-18 2010-10-20 张惠生 Rotary oil smoke purifier
EP2275187A2 (en) * 2009-07-14 2011-01-19 Jeven AB Air filter and air filtering arrangement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU655407A1 (en) * 1977-10-28 1979-04-05 Институт Металлургии И Обогащения Ан Казахской Сср Apparatus for cleaning gases from dispersed particles
SU1278547A2 (en) * 1984-04-29 1986-12-23 Центральный Научно-Исследовательский И Проектно-Конструкторский Институт По Проектированию Оборудования Для Целлюлозно-Бумажной Промышленности Conditioner
RU2011403C1 (en) * 1992-03-26 1994-04-30 Савенков Николай Владимирович Filter
CN101865482A (en) * 2009-04-18 2010-10-20 张惠生 Rotary oil smoke purifier
EP2275187A2 (en) * 2009-07-14 2011-01-19 Jeven AB Air filter and air filtering arrangement

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