EP1530109A2 - Ventilator and method for controlling the air flow through a ventilator - Google Patents

Abstract

A pair of guide baffles (28) extend inward from a lower end of one side towards the outlet opening. An air channel is formed between the guide baffles and a mounting (14) to which the fan blower (12) is set. The air flow channel creates a construction on air flow to raise air pressure within the air flow channel to create mono-directional air flow in the channel and through the outlet opening. An independent claim is also included for a control method for air flow.

Description

The invention relates to a fan system and a method for control the air flow of a fan system.

The present invention relates in particular, but not exclusively, to on a fan air flow control to mitigate the noise at a fan in a clean room facility.

In modern manufacturing and testing facilities, it is common for the amount of to control circulating air particles in a clean room facility, to ensure the quality of the output of the clean room facility. Regardless of whether it is semiconductor wafers, CDs or memory floppy disk drives act, effective fan systems are required, to not only the particle content within the clean room in acceptable But also to circulate the air inhaled by workers allow. As such, fan systems tend to be relatively powerful to be.

However, such powerful fan systems cause excessive noise. Insulating material has been used to cover the insides of the housing to mitigate the noise generated by the wind turbine fans. However, such an elementary method often does not attenuate the noise to a satisfactory level for workers in the clean room facility. The problem associated with the noise in a clean room facility worsens in tight spots or surrounds, such as in a multi-level chip manufacturing facility. Where there is a low clear height, the noise from fan systems may be quite pronounced.
The invention has for its object to provide fan systems of the type mentioned, in which the disadvantages mentioned no longer occur.

To solve this problem, the features of claims 1 and 30 are provided. Advantageous Ausführungsfbrmen and expedient developments of Invention are described in the subclaims.

• ein Kopfteil mit einer Einlassöffnung,
• mindestens eine Seite, die die Ventilator-Anlage umschließt,
• eine Auslassöffnung,
• ein auf einem Gebläse-Gestell sitzendes Windradgebläse, wobei das Windradgebläse dem Einblasen von Luft durch die Einlassöffnung und dem Ausstoßen von Luft durch die Auslassöffnung dient,
• mindestens ein Paar Leitstangen, die sich von einem niedrigeren Ende von mindestens einer Seite zur Auslassöffnung nach innen erstrecken, wobei das genannte Paar Leitstangen und das Gebläse-Gestell einen dazwischen liegenden Luftstromkanal bilden. Der Luftstromkanal bildet eine Verengung des Luftstromes, um den Luftdruck innerhalb des Luftstromkanals anzuheben und dadurch im Wesentlichen einen Luftstrom mit reduzierter Turbulenz in einer Richtung im Luftstromkanal und durch die Auslassöffnung zu schaffen, so dass der Lärm aus besagter Ventilator-Anlage abgeschwächt wird.

According to a preferred form, a fan system according to the invention comprises:

• a head part with an inlet opening,
• at least one side enclosing the fan unit,
• an outlet opening,
• a fan blower seated on a fan frame, the fan blower serving to inject air through the inlet port and expel air through the outlet port,
• at least one pair of guide rods extending inwardly from a lower end of at least one side to the outlet opening, said pair of guide rods and the fan frame forming an airflow channel therebetween. The airflow channel narrows the airflow to raise the air pressure within the airflow channel and thereby provide substantially reduced turbulence airflow in one direction in the airflow channel and through the outlet port so as to mitigate noise from said fan assembly.

There may be two pairs of baffles arranged in the fan unit be, with the baffles are each vertical. The guide baffles can set the outlet opening. The guide baffles can at an angle of 90 ° and 60 °, preferably 90 ° to at least one Be arranged side. The baffle plates can be perforated. The perforation can spread over the entire baffle plates or just over one Part of it extend, and the baffle plates can be covered by a cloth be. In addition, or alternatively, the baffles can be bent or flat.

The outlet opening may take the form of: circular, triangular, square, rectangular, pentagonal or octagonal.

There may also be at least one pair of plates in the fan unit are arranged and located between the upper end and at least extend one side and are each connected thereto, wherein at least a pair of plates defines an enclosed space behind it. It can two pairs of plates may be present, with the plates each perpendicular stand. At least one of the plates can be perforated. The perforations can spread over the entire area or over part of at least one the plates extend. The plates can be curved or flat, and the Plates can be covered by a cloth. The enclosed space can with be filled with a noise insulating material.

A noise insulating material may be used to form an inner surface of one or more of the following parts: at least one side, the Headboard, the guide baffles and the plates.

On the surface of the fan frame, a noise insulating material can be attached be. The surface can be a bottom. The Blower rack can be in the form of a reverse floor with related Side walls are present, the noise insulating material is in the ground.

The headboard may have a central opening. The central opening can be a Inlet cover, wherein the inlet opening in the inlet cover is arranged.

A filter may be located below the outlet opening.

At least one side may consist of four vertical sides, wherein the Pages also each perpendicular to the headboard.

Furthermore, a method for controlling the air flow is provided.

Brief description of the drawings

Figur 1:

Eine perspektivische Vorderansicht in aufgelösten Einzelteilen einer bevorzugten Form der hier vorliegenden, als Teil einer Ventilator-Anlage ausgebildeten Erfindung.

Figur 2:

Ein erhöhter Querschnitt der Anordnung gemäß Figur 1 beim Einbau.

Figur 3:

Ein vollständiger Querschnitt längs den Geraden A-A und entlang der Richtung der Pfeile A-A gemäß Figur 2.

Figur 4:

Eine der Figur 3 entsprechende Ansicht einer alternativen Ausführungsform.

Figur 5:

Darstellung der Orte, wo die Geschwindigkeit des Luftstromes gemessen wurde.

Figur 6:

Ein Diagramm mit dem Vergleich der durchschnittlichen Geschwindigkeit des Luftstromes und dem Geräuschpegel der bevorzugten Form der hier vorliegenden Erfindung mit den Werten der nicht bevorzugten Form.

Figur 7:

Ein erhöhter Querschnitt einer alternativen Ausführungsform Verkörperung des unteren Teils der zusammengebauten Anordnung gemäß Figur 1.

In order that the invention may be clearly understood and readily practiced, by way of non-limiting example only, preferred embodiments of the present invention will be described, the description of which is made with reference to the accompanying illustrative drawings.

FIG. 1:

An exploded front perspective view of a preferred form of the present invention as part of a fan unit.

FIG. 2:

An elevated cross-section of the arrangement according to FIG. 1 during installation.

FIG. 3:

A complete cross section along the straight line AA and along the direction of the arrows AA according to FIG. 2.

FIG. 4:

A view corresponding to Figure 3 of an alternative embodiment.

FIG. 5:

Representation of the places where the speed of the air flow was measured.

FIG. 6:

A graph comparing the average velocity of the air stream and the noise level of the preferred form of the present invention with the values of the non-preferred form.

FIG. 7:

An elevated cross section of an alternative embodiment of embodiment of the lower part of the assembled arrangement according to FIG. 1.

Description of the preferred embodiments

In the following description, numerous specific details are set forth, such as. Guide baffles and baffles to a thorough understanding to allow the invention. In other case studies well-known items, such as the motors for the blower frame and not shown and / or described channels connected to the fan systems so as not to obscure the invention.

FIG. 1 shows a perspective exploded view of individual parts a preferred embodiment of the present invention as part of a Fan unit. The fan system includes four vertical side walls 22 and an annular head portion 17 having a central opening 10. Although the fan unit is shown in a square shape, it can be one have any shape, such as cylindrical, triangular, rectangular, pentagonal, octagonal, etc.

The central opening 10 is shown in square. She can also do another take appropriate form, e.g. round, triangular, rectangular, five-cornered, octagonal, etc. Preferably, the shape of the central opening 10 is similar to that of FIG Shape of the fan system.

The air inlet cover 11 lies above the central opening 10 and closes it from. The cover 11 covers the central opening 10 and is in dimensions larger than opening 10, so that they are the head part 17 along the outer surface the opening 10 touched. The cover 11 is safe, removable and largely flush sealed connected to the head part 17. The cover 11 is also annular and has a central air inlet opening 18. The inlet opening 18 is shown around. It can be any shape ever as required or desired, e.g. triangular, quadrangular, rectangular, five angular, octagonal, etc. There may be more than one inlet port 18 give.

A wind turbine fan 12 is mounted on a fan blower frame 14, the associated side walls 15 may have. As alternative For this, the frame 14 may be flat. The frame 14 may also be reversible. Attached to the fan frame 14 extend from there four rods 13 upwards, which are also releasably connected to the air inlet cover 11. A motor for generating rotational movements for the wind turbine fan 12 is Not shown, but required for normal operation of the fan system. The frame 14 may be larger in size than the outlet opening 19 in the horizontal plane, making it over the outer surface of the Outlet opening 19 extends. The frame 14 may also be in dimensions smaller than the outlet opening 19 in the horizontal plane. The dimensions of the frame 14 may be of the dimensions of the wind turbine 12th be dependent. The size of the wind turbine fan 12 may differ from the power requirements dependent on a user. The frame 14 does not have to be individual be prepared wind turbine fan rack.

In this way, the wind turbine fan 12 in the fan system located and may be mounted on its frame 14. The frame 14 can from the head part 17 via the connection of the rods 13 with the inlet cover 11 hang down, and the inlet cover 11 can from the headboard 17 are supported. As a result, in the case of care, maintenance or Replacement works the fan 12 easily removed through the central opening 10 become. The central opening should be a corresponding size to have.

The fan unit automatically blows outside air through the air inlet 18, such as represented by the arrows 1 in Figure 2. The air is passing through the outlet 19 ejected, as shown by the arrows 2 in Figure 2. About the outlet opening 19, a filter 32 for removing large particles or contaminants. The Auslaßöffimng 19 is square shown. It can take any suitable or desired form, such as. circular, triangular, rectangular, pentagonal, octagonal, etc. Es may be more than one outlet port 19. The filter 32 may be spaced can be arranged in front of the outlet opening 19, or he can directly lie next to the outlet opening 19.

In Figure 1, the baffles 28 are at strategic locations within the Fan system attached to mitigate the noise there and they can are also located along the path of the airflow. The baffles 28 extend inwardly from the lower end of side 22. At least a pair of the guide baffles 28 are on opposite sides of the outlet opening 19 is mounted and extends inwardly from the side walls 22 to the outlet port 19. The baffles 28 of the pair are substantially identical, opposite, parallel and coplanar. The Guide baffles 28 form with the side walls at an angle of 90 ° 60 °, preferably 90 °. There are preferably also two such pairs of baffle plates 28, each of which is perpendicular to a bottom of baffle plates 28 to form around the outlet opening 19 around. The guide baffles 28 may also define the outlet opening 19. The guide baffles 28 can be flat, as shown, or they can be curved be. If they are curved, they can down to the outlet opening 19 to be curved. This is illustrated in FIG.

FIG. 3 shows a complete cross-section along the straight lines A-A in FIG Figure 2 and highlights the guide baffles 28. The guide baffles 28 are arranged so that they the expelled air from the fan blower 12th can record (see dashed circle) and the air flow 3 inside the fan system with a minimum of turbulence to and through the Outlet opening 19 can conduct.

Furthermore, at least one pair of plates 26 for further attenuation of provided by the air flow 3 generated by the wind turbine 12 noise be.

Preferably, there are two pairs of plates 26, each perpendicular to one another standing. The plates 26 extend between the head part 17 and the sides 22 and are preferably at an angle between 30 ° and 60 °, preferably 45 °, to the sides 22, and therefore at an angle between 60 ° and 30 °, preferably 45 °, to the header 17. Each panel 26 may be a metal panel and can be a matrix with holes or perforations over have their entire surface or parts thereof.

There may be noise insulating materials 6 and / or for example in the form of Sponge, fiberglass, rock wool, linen cloth, etc. on the plates 26 and / or the guide baffles 28 and / or the head part 17 on one of the air streams 1, 2 and 3 opposite inner surface are attached. The plates 26 are preferably attached at the above angles to the by to attenuate the airflow 3 noise generated by the wind turbine fan 12 and / or to assist in the regulation of the airflow 3.

As mentioned above, each plate 26 may contain perforations. The size of the Perforations can determine if the air is passing through the air Perforations slows down. Since the plates 26 between the head part 17th and extending the sides 22, there is a gap 31 between each plate, the head part 17 and the side 22 generated. Due to the gap 31 behind the plates 26, the air pressure in gap 31 increases and is so that with the on the perforations on the part of the air flow 3 -loading air pressure identical with the highest speed. This will make the air pressed out through the perforations in the plates 26, where the air flow 3 not so fast. The gap 31 may be insulated or a be equipped with other material caused by the air turbulence To reduce noise. The plate 26 may also be completely or partially be perforated.

Noise insulating materials may be used to seal the gap 31 partially or completely completed. The noise insulating material may consist of the following consist of: sponge, fiberglass, rock wool, linen cloth, etc. If desired, the head part of the air flow 3 opposite insulation be provided with a protective layer to the insulating material against Displacement and decay continue to increase over time.

In order to further reduce the noise level, the insulating material 16 also attached to a lower surface of the fan blower frame 14 to reduce the noise generated by airflow 3 and blower 12, continue to absorb. The insulating material 16 may be applied to other surfaces of the Frames 14 are attached. If the frame 14 is an inverted one Floor acts (as shown), the insulating material 16 can within of the soil 14 are located. The frame 14 preferably has sides that extend extend vertically at a height greater than or equal to the thickness of the insulating material 16 are.

One or more of the baffles 28 may be porous, if desired. The porosity may be due to perforations over the area of the baffles 28 can be achieved. The perforations can spread over their entire Surface or only part of it.

If isolated, the baffles 28 and the plates 26 may be over the entire Insulating material or over part or the perforations a cloth cover will be placed to increase the likelihood of a relocation and to reduce pollution of the air. The perforations can helpful in the attachment of the insulating material of the baffles 28 and the Be plates 26.

The guide baffles 28 direct the airflow 3 to the outlet opening 19, and they can be flat or curved.

The side walls 22 may have insulation 36 over their entire inner surfaces or have a part of it. The insulating material 36 may have a larger Have thickness as the / the insulating materials 6 and / or 16. It can off Sponge, fiberglass, rock wool, linen cloth and can be a cloth cover to have. Some or all of the insulating materials 6, 16, 36 may, if required or desired, have reinforcing frame.

Since the fan frame 14 as shown on the outer surface of the Auslassöffimng 19, the guide baffles 28 and the blower rack generate 14 between them one or more air flow channels 20 through which the air is blown to the outlet port 19 and thus through the filter 32. Preferably, the air flow channels extend around the outer surface of the Outlet opening 19 around.

The outlet airflow 2 may circulate through the filter 32. this is also valid for the embodiment as shown in Figure 7. The air flow channels 20 create a constriction of the air flow, and therefore form a high pressure zone. The air flows from high pressure to low pressure. This will be the forced all air to flow through the channels 20, which causes that the air flow is very strong only in one direction through the outlet opening 19 moves, since the air is generally not from low pressure to High pressure flows. As a result, the turbulence in the channels 20 and the Outlet 19 significantly reduced. The noise as such becomes considerable attenuated, and the airflow throughput is increased.

FIG. 6 shows a diagram in which the average velocity v of the Air flow and the noise level N of a fan system of the present here Invention compared with the values without the present invention become. The average velocity v of the air flow is at 24 different points measured in the installation of the fan, as illustrated in FIG. In Fig. 6 (a) is a conventional fan unit whereas Figures 6 (b) and 6 (c) are here shown present invention. The average speed v of Air at both 6 (b) and 6 (c) is higher, and the noise level is N. lower than in 6 (a). As such, the pressure loss of the fan systems. 6 (b) and 6 (c) smaller than in Fig. 6 (a). That's why energy savings can be made with the Time to be achieved.

Finally, and most importantly, the noise level becomes N in Decibels from a fan unit of the preferred form present here Invention compared with a non-preferred form, and is at measured a spot 1.5 meters below the outlet of the plant. As the Measuring at a location 1.5 meters below a fan system can show it is an embodiment of the present invention that the Fan system can be operated with less noise than a fan system according to the prior art.

While the present invention in particular with reference to the Figures 1 to 7 with emphasis on a method and system for mitigating of the noise in a fan unit, it should be different from even understand that the figures are for illustrative purposes only and can not be considered as if they restricted the invention. Furthermore it is obvious that the procedure and the plant according to the here present benefits for many applications in which an air flow control is required. It is intended that many changes and modifications with the usual skill in this field can be performed without departing from the spirit and scope of the invention to deviate, as described.

LIST OF REFERENCE NUMBERS

(1)

Intake air flow

(2)

Outlet air flow

(3)

Internal airflow

(6)

insulating material

(10)

Central opening

(11)

Air inlet cover

(12)

fan

(13)

rods

(14)

Blower-frame

(15)

Pages of 14

(16)

insulating material

(17)

headboard

(18)

Air inlet opening

(19)

air outlet

(20)

Air flow channels

(22)

side walls

(26)

plates

(28)

Leit baffles

(31)

Gap behind 26

(32)

filter

(36)

insulating material

Claims (30)

Fan system comprising: a head part with an inlet opening, at least one side enclosing the fan unit, an outlet opening, a fan blower seated on a rack, the fan blower serving to inject air through the inlet port and expel air through the outlet port, at least one pair of baffles extending inwardly from a lower end of the at least one side to the outlet opening, wherein between the at least one pair of baffles and the frame is formed an airflow channel that creates a restriction of the airflow to the air pressure to raise within the air flow channel and thereby produce a substantially directed airflow with reduced turbulence in the air flow channel and through the outlet opening, so that the noise is attenuated from said fan unit. Fan system according to claim 1, characterized in that the frame is a fan frame. Fan system according to claim 1 or 2, characterized in that two pairs of guide baffles are mounted within the fan system, wherein the guide baffles are each perpendicular. Fan system according to claim 3, characterized in that the guide baffles define the outlet opening. Fan system according to one of claims 1 to 4, characterized in that the guide baffles are arranged at an angle between 90 ° and 60 ° to at least one side. Fan system according to claim 5, characterized in that the angle is 90 °. Fan system according to one of claims 1 to 6, characterized in that the guide baffles are perforated. Fan system according to claim 7, characterized in that the perforations extend only over part of the guide baffles. Fan system according to claim 7, characterized in that the perforations extend over the entire baffle plates. Fan system according to claim 8 or 9, characterized in that the perforations are covered by a cloth. Fan system according to one of claims 1 to 10, characterized in that the outlet opening is circular, triangular, square, rectangular, pentagonal or octagonal. Fan system according to one of claims 1 to 11, characterized in that the guide baffles are curved. Fan system according to one of claims 1 to 12, characterized in that it comprises at least one pair of plates which are mounted in the fan unit and extend between the head part and at least one side, wherein each of the at least one pair of plates defines a closed gap between each of at least one pair of plates, the header and at least one side. Fan system according to claim 13, characterized in that the plates are at an angle between 30 ° and 60 ° to the head part. Fan system according to claim 14, characterized in that the angle is 45 °. Fan system according to one of claims 13 to 15, characterized in that two pairs of plates are present and the plates are each vertical. Fan system according to one of claims 13 to 16, characterized in that at least one pair of plates is perforated. Fan system according to claim 17, characterized in that the perforations extend over the entire plates of the at least one pair. Fan system according to claim 17, characterized in that the perforations extend only over part of the plates of the at least one pair. Fan system according to one of claims 17 to 19, characterized in that the perforations are covered by a cloth. Fan system according to one of claims 13 to 20, characterized in that the plates are curved. Fan system according to one of claims 13 to 21, characterized in that the closed intermediate space is at least partially filled with noise insulating material. Fan system according to one of claims 1 to 22, characterized in that a noise insulating material is used to cover an inner surface of one or more of the following parts: at least one side, head part, baffle plates and plates. Fan system according to one of claims 1 to 23, characterized in that a noise insulating material is attached to the surface of the fan frame. Fan system according to one of claims 1 to 24, characterized in that the fan frame in the form of an inner bottom with associated side walls, and that the noise insulating material is located in the ground. Fan system according to one of claims 1 to 25, characterized in that the head part has a central opening, which has an inlet cover, wherein the inlet opening is located in the inlet cover. Fan system according to one of claims 1 to 26, characterized in that it has a filter mounted below the outlet opening. Fan system according to one of claims 1 to 27, characterized in that at least one side comprises four respective vertical side walls, and that the side walls are each also arranged perpendicular to the head part. Fan system according to one of claims 1 to 28, characterized in that the deflector plates used in the fan system are designed as scattering baffles or baffle plates. Method for controlling the air flow using a fan system comprising: a headboard with an inlet opening, at least one side for enclosing the fan system, an outlet opening, a fan blower mounted on a fan frame, the fan blower having the function of blowing air through the inlet port and expelling air through the outlet port, at least one pair of guide rods extending inwardly from a lower end of the at least one side to the outlet opening, wherein an airflow channel is formed between the at least one pair of guide rods and the fan frame, and the airflow channel narrows the airflow to increase the air pressure within the air flow is generated to provide substantially a flow of air in one direction and with reduced turbulence in the air flow channel and through the outlet opening, so that the noise is attenuated in said fan unit.

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