WO2016089257A1 - Cleanroom with directional air vent - Google Patents
Cleanroom with directional air vent Download PDFInfo
- Publication number
- WO2016089257A1 WO2016089257A1 PCT/SE2014/000144 SE2014000144W WO2016089257A1 WO 2016089257 A1 WO2016089257 A1 WO 2016089257A1 SE 2014000144 W SE2014000144 W SE 2014000144W WO 2016089257 A1 WO2016089257 A1 WO 2016089257A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cleanroom
- air
- air vent
- directional
- directional air
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/04—Ventilation with ducting systems, e.g. by double walls; with natural circulation
- F24F7/06—Ventilation with ducting systems, e.g. by double walls; with natural circulation with forced air circulation, e.g. by fan positioning of a ventilator in or against a conduit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
- F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- 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
- F24F3/167—Clean rooms, i.e. enclosed spaces in which a uniform flow of filtered air is distributed
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Ventilation (AREA)
Abstract
The invention relates to a cleanroom (1), to which air that has passed an air filter is supplied by a fan system through a directional air vent (6a1-2, 6b1-2, 6c1-2), and from which air leaves through another directional air vent (6a1-2, 6b1-2, 6c1-2). A first directional air vent (6a1-2, 6b1-2, 6c1-2) is provided for blowing air into the cleanroom that is directed towards a first adjacent corner of the cleanroom, and a second directional air vent (6a1-2, 6b1-2, 6c1-2) is provided for sucking air out of the cleanroom that is directed towards a second adjacent corner of the cleanroom. This reduces the risk of stagnation occurring in the corners. In one embodiment, a directional air vent (6a1-2, 6b1-2, 6c1-2) directed towards an adjacent corner of the cleanroom, is arranged near the adjacent corner. One solution is that precisely one directional air vent (6a1-2, 6b1-2, 6c1-2) is directed towards an adjacent corner for every corner of the cleanroom. The cleanroom may further comprise an air vent (5a-c) lacking directionality.
Description
Cleanroom with directional air vent
The present invention relates to a cleanroom with a directional air vent according to the introductory portions of the independent claims.
Background of the invention
A cleanroom is constituted by a closed space to which is connected a fan system that pumps air into the cleanroom via a filter. A certain minimum air flow is continuously flowing in order to force contaminated air out. The air flow passes through the cleanroom via air vents and the flow is normally slow and laminar. This means that stagnant air may occur in the corners, where particles may accumulate and a locally heightened particle density may build up. These stagnant areas are undesired and may generate sudden elevations of the particle density if the air in the corners is stirred.
An object of the invention is therefore to provide a cleanroom with a directional air vent that reduces the risk of sections of the room with stagnant air.
These and other objects are attained by a a cleanroom with a directional air vent according to the characterising portions of the independent claims.
Summary of the invention
The invention relates to a cleanroom 1, to which air that has passed an air filter is supplied by a fan system through at least one directional air vent 6al-2, 6b 1-2, 6c 1-2, and from which air leaves through at least one other directional air vent 6a 1-2, 6b 1-2, 6c 1-2. At least a first directional air vent 6al-2, 6b 1-2, 6cl -2 is provided for blowing air into the cleanroom that is directed towards a first adjacent corner of the cleanroom, and at least a second directional air vent 6al-2, 6b 1-2, 6c 1-2 is provided for sucking air out of the cleanroom that is directed towards a second adjacent corner of the cleanroom. Advantageously, this reduces the risk of stagnation occurring in the corners.
In a particularly advantageous embodiment, at least one directional air vent 6a 1-2, 6b 1-2, 6c 1-2 directed towards an adjacent corner of the cleanroom, is arranged near the adjacent corner. An
effective solution is that precisely one directional air vent 6al-2, 6bl-2, 6cl-2 is directed towards an adjacent corner for every corner of the cleanroom.
The cleanroom may further comprise at least one air vent 5a-c lacking directionality. Brief description of the drawings
Fig. 1 shows a schematic cross section through a cleanroom with regular air vent seen from above
Fig. 2 shows a schematic cross section through a cleanroom with air vents according to the invention seen from above
Fig. 3 shows a schematic cross section through a cleanroom with air vents according to the invention seen in a side view
Fig. 4 shows an intermediate wall in a cleanroom with air vents according to the invention Fig. 5 shows an air vent according to the invention Description of a preferred embodiment
Fig. 1 shows a schematic cross section through a cleanroom 1 seen from above. The air flow through the cleanroom comes from regular air vent opening 5a-c arranged as is known in the art. The cleanroom is divided in two parts, an operator part 2 and an entrance sluice 3. The two parts are separated by an intermediate wall 4. On the wall of the operator part sits furthest from the intermediate wall, a first air vent 5a is arranged, and air from a fan system having passed a filter blows out of the air vent 5a and into the operator part.
A second air vent 5b is arranged on the intermediate wall, and air from the first air vent passes through the operator part and leaves it through the second air vent. The air vent reaches the entrance sluice and the air moves from the second air vent into the entrance sluice. The first and second air vents are arranged opposite to each other such that the air from the first moves in a laminar fashion from the first to the second.
A third air vent 5c is arranged in the entrance sluice opposite to the second air vent. Air flowing out of the second air vent in the entrance sluice moves in a laminar fashion towards the third air vent and flows out of the cleanroom through it.
The air vent openings are selected with such a small total area that a small positive pressure relative to the surroundings is up kept in the entrance part and yet somewhat higher pressure is achieved in the operator part. It is these pressure differences that cause the continuous air flow from the operator part to the entrance part, and further from the entrance part to the surroundings. The air vent openings are also selected to have such a large total area, that turbulence and noise does not occur when air passes through the air vent openings, as this could be annoying to an operator in the operator part. This makes the air flow through the whole cleanroom laminar, and it is this laminar flow that is illustrated by the dashed arrows in the figure. As the illustration shows, there is little air movement in the corner areas of the cleanroom and stagnation occurs near the corners, which is illustrated by dotted areas. In these areas, particles may accumulate and particle densities may build up to undesirably high levels.
Even if the air flow through the cleanroom, when undisturbed, is well illustrated by the figure, and operator moving through the cleanroom or goods being transported into or out of the room may disturb the air flow. At such a disturbance, air with an elevated particle density may suddenly move out of the corned areas and give rise to an undesired raise of the particle density.
Fig. 2 shows a schematic cross section through a cleanroom both with regular air vents 5a-c and with air vents 6al-2, 6bl-2, 6cl-2 according to the invention seen from above. The cleanroom according to the invention is structured in the same way as the regular cleanroom in figure 1, but differentiates from it by the added air vents 6a 1-2, 6b 1-2, 6c 1-2 and their positioning and directionalities.
On the wall of the operator part of the cleanroom that sits furthest from the intermediated wall are, in addition to the first air vent 5a, two first directional air vents 6a 1-2 arranged. From the first air bent opening, air flows directly against the intermediate wall, while from the two first directional air vents 6al-2, the air flow is directed towards respective adjacent corner of the room, such that stagnation may not occur in these corners.
On the intermediate wall, the second air vent and a further pair of air vents 6b 1-2 are arranged,
having openings facing the operator part and the entrance sluice, respectively. The second pair of air vents has air vent openings on both sides of the intermediate wall, directed towards adjacent corners of the operator part and the entrance sluice, respectively. On the side of the intermediate wall that faces the entrance sluice, the outgoing flows from the second pair of air vents are well directed towards respective corner, while on the side of the intermediate wall that faces the operator part, the corresponding directionality is smaller but it is still present, such that the air movement in the operator part has a component of motion that reaches all the corners of the operator part.
On the wall of the entrance sluice that is arranged farthest from the intermediate wall, a regular air vent 5c is provided, and further a third pair of openings 6c 1-2 with directional air vents. The directional air vents on the sluice wall are directed towards respective adjacent corner, such that the air tend to move along the outer walls and into all the corners of the room.
The figure schematically illustrates that the air movement near the centre of the room is nearly linear, while the directional air vents 6a 1-2, 6b 1-2, 6c 1-2 cause air movement that extends into each corner and then out of the next corner, such that stagnation may not occur in either corner.
Fig. 3 shows a schematic cross section through a cleanroom according to the invention seen in a side view. The cross section is selected in such a fashion that only the directional air vents are illustrated, as these most clearly illustrates the basic principle of the invention. What in fig. 2 is illustrated as three pairs of directional air vents, are in reality constituted by three upper pairs of directional air vents and three pairs of directional air vents situated directly below the upper ones, that obviously may not be viewed as seen from directly above.
In the figure, a first upper directional air vent 6a and a first lower directional air vent are illustrated, where the upper one is directed such that the out flowing air is directed upwards and the lower one is directed such that the out flowing air is directed downwards. The purpose is to direct the air into the corners, in the horizontal as well as in the vertical direction.
A second upper opening 6b and a second lower opening 6b are arranged on the intermediate wall, both having directional air vents. The air vents on both sides of the second upper opening are directed upwards and the air vents on both sides of the second lower opening are directed downwards. The purpose is, in a corresponding way, to direct the air into the corners, in the
horizontal as well as in the vertical direction.
On the wall of the entrance sluice that sits farthest from the intermediate wall, there are also corresponding upper and lower openings 6c, the upper one directed upwards and the lower one directed downwards. The figure illustrate schematically with dashed arrows how the air movement from the directional air vent is forced into the corners and runs along the roof and floor, is the way that constitutes the purpose if the air vent distribution.
Fig. 4 shows the intermediate wall in the cleanroom with directional air vents 6b 1-2 according to the invention, and a regular opening 5 for air flowing through it. The wall is provided with a glass window 8 in its upper portion and the wall is partitioned in a right portion and a left portion, with a sliding door in between. The sliding door does not extend all the way to the floor, but leaves a slot 5 at the bottom that constitutes the regular air vent opening. The regular air vent opening has no significant directionality.
On the lower portion of the intermediate wall, four directional air vent 6al -2 are arranged, two on the left side and two on the right side. The lower one of the left air vents is directed in an angled fashion downwards and to the left and the upper one is directed in an angled fashion upwards and to the left. The lower one of the right air vents is directed in an angled fashion downwards and to the right and the upper one is directed in an angled fashion upwards and to the right. The perspective view in the illustrations of figs. 2 and 3 are such that these angled air flows canot be shown in a good way, but in fig. 4 it is clarified that the air flow from the directional air vents are directed towards respective adjacent corner, even though the directionality is lesser for air influx into a directional air vent than airflow out of a directional air vent.
Fig. 5 shows a directional air vent 6 according to the invention. The directional air vent is constituted by a essentially flat circular element that is placed over an opening for air flux through a wall. A series of parallel openings 7 extend across the air vent, and from the essentially flat element, portions that are angled upwards sits along each opening. The upwards angled portions force air passing through the openings to flow in a given direction, which in the figure is downwards. Obviously, other types of air vent openings may be used, but the illustrated type is commonly used.
The disclosed embodiment presents directional air vents adjacent to each corner of both parts of
the cleanroom, one air vent directed towards each corner. Obviously, one may reduce the number of corners towards which air vents are directed, but this would clearly diminish the effect. One may further direct several air vents towards each corner in order to improve on the effect. The design may be used with directional air vents only or in combination with air vents lacking directionality.
Claims
Claims
1 A cleanroom (1), to which air that has passed an air filter is supplied by a fan system through at least one directional air vent (6al-2, 6bl-2, 6cl-2), and from which air leaves through at least one other directional air vent (6al-2, 6bl-2, 6cl-2), characterised in that at least a first directional air vent (6a 1-2, 6b 1-2, 6c 1-2) is provided for blowing air into the cleanroom that is directed towards a first adjacent corner of the cleanroom, and where at least a second directional air vent (6al-2, 6bl-2, 6cl-2) is provided for sucking air out of the cleanroom that is directed towards a second adjacent corner of the cleanroom.
2 A cleanroom (1) according to claim 1, characterised in that at least one directional air vent (6al-2, 6bl-2, 6cl-2) directed towards an adjacent corner of the cleanroom, is arranged near the adjacent corner.
3 A cleanroom (1) according to any one of the previous claims, characterised in that at least one directional air vent (6al-2, 6b 1-2, 6c 1-2) is directed towards an adjacent corner for every corner of the cleanroom.
4 A cleanroom (1) according to claim 3, characterised in that precisely one directional air vent (6al-2, 6bl-2, 6cl-2) is directed towards an adjacent corner for every corner of the cleanroom.
5 A cleanroom (1) according to any one of the previous claims, characterised in that the cleanroom further comprises at least one air vent (5a-c) lacking directionality.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2014/000144 WO2016089257A1 (en) | 2014-12-01 | 2014-12-01 | Cleanroom with directional air vent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SE2014/000144 WO2016089257A1 (en) | 2014-12-01 | 2014-12-01 | Cleanroom with directional air vent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016089257A1 true WO2016089257A1 (en) | 2016-06-09 |
Family
ID=56092078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SE2014/000144 WO2016089257A1 (en) | 2014-12-01 | 2014-12-01 | Cleanroom with directional air vent |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2016089257A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108014A (en) * | 2019-05-17 | 2019-08-09 | 太原理工大学 | Angie type automatic control supply air system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4409889A (en) * | 1981-11-02 | 1983-10-18 | Burleson Maurice L | Modular clean room |
| US5256105A (en) * | 1992-03-02 | 1993-10-26 | Clean Air Technology, Inc. | Washable seamless clean room |
| JPH09150027A (en) * | 1995-11-29 | 1997-06-10 | Sanki Eng Co Ltd | Filter unit for tunnel-type clean room |
| JP2005325591A (en) * | 2004-05-14 | 2005-11-24 | Penta Ocean Constr Co Ltd | Cleanable room structure, and method for cleaning the room |
| SE1300757A1 (en) * | 2013-12-06 | 2015-06-07 | Qleanair Scandinavia Ab | Clean room with directional valve opening |
-
2014
- 2014-12-01 WO PCT/SE2014/000144 patent/WO2016089257A1/en active Application Filing
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4409889A (en) * | 1981-11-02 | 1983-10-18 | Burleson Maurice L | Modular clean room |
| US5256105A (en) * | 1992-03-02 | 1993-10-26 | Clean Air Technology, Inc. | Washable seamless clean room |
| JPH09150027A (en) * | 1995-11-29 | 1997-06-10 | Sanki Eng Co Ltd | Filter unit for tunnel-type clean room |
| JP2005325591A (en) * | 2004-05-14 | 2005-11-24 | Penta Ocean Constr Co Ltd | Cleanable room structure, and method for cleaning the room |
| SE1300757A1 (en) * | 2013-12-06 | 2015-06-07 | Qleanair Scandinavia Ab | Clean room with directional valve opening |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108014A (en) * | 2019-05-17 | 2019-08-09 | 太原理工大学 | Angie type automatic control supply air system |
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