JP4720128B2 - Fan filter unit - Google Patents

Description

  The present invention relates to a filter mounting structure for a fan filter unit used in a clean room requiring a clean space such as a semiconductor factory or a food factory.

  Conventionally, this type of filter mounting structure is configured such that a filter can be attached and detached by combining joining members and hooks having different shapes (see, for example, Patent Document 1).

JP 2001-336815 A ([0001] to [0029], FIGS. 1 to 8)

  In such a conventional filter attaching / detaching method, it is necessary to attach the fixing bracket to the fan box first, and there is a problem that fine adjustment to improve the sealing performance is difficult after installation, and the fixing bracket is easy on site. It is required that the sealing performance can be improved even after installation.

  In addition, when a structure is used in which the joining member is hooked on the lower surface of the filter, when the fan filter unit is installed in the housing, the lower surface of the filter cannot be directly fixed to the housing, and another member is required for housing installation. There is a problem that it can be fixed directly to the housing.

  In addition, when installing multiple filters in a stack, there is a problem that there is no quick method to fix all the filters and fan boxes so that they are not laterally displaced. A structure that can be securely fixed is required.

The present invention solves such a conventional problem of filter attachment / detachment, and can be performed in a short time without removing the filter installation preparation work, and a chamber in which a plurality of filters are stacked. It is an object of the present invention to provide a filter mounting structure that can securely fix a filter to a housing in a space-saving manner and that can easily and directly fix a combined body of a chamber and a filter to a housing.

In order to achieve the above object, a fan filter unit of the present invention includes a chamber containing a fan unit including a fan and a motor, a filter including at least one sheet disposed on the downstream side of the fan unit, There is an elastic packing inserted between the filter and the chamber, and a fixing bracket having a U-shaped cross section. This fixing bracket has a chamber pressing portion that engages the surface of the chamber at one end, and a holding member at the other end. The filter holding portion that engages with the filter frame, and a side surface of the chamber and a central plate portion that is in contact with or close to the side surface of the filter, the filter is integrated with a C-shaped filter frame that is open on the outer peripheral side. Composed of
The fixing metal fitting hangs the filter holding portion on the upper end portion of the filter frame provided on the downstream filter, and then hangs the chamber holding portion on the top surface of the chamber to connect the filter and the chamber. It is something that is sandwiched and joined .

  As another means, the fixing bracket is provided with a pair of side surface pressing portions standing from both ends of the central plate portion, and the side surface pressing portions are provided close to the opposing side surfaces of the chamber and the filter.

  Another means is that the front end of the chamber pressing part is provided with an open-shaped square-shaped part.

  Another means is that a mounting hole is provided in the chamber pressing portion of the fixture, and a chamber adjusting bolt that is screwed into the mounting hole and press-contacted with the chamber surface is provided.

  The other means is provided with a filter adjusting bolt which is provided with a mounting hole in the filter holding portion of the fixing metal fitting and is screwed into the mounting hole and press-contacted with the back surface of the filter frame.

  In another means, a mounting hole for a chamber fixing bolt is provided on the side surface of the chamber, and an opening hole for allowing the chamber fixing bolt to pass through a central plate portion of the fixing bracket.

  As another means, the fixing bracket is composed of a chamber-side fixing bracket and a filter-side fixing bracket. The chamber-side fixing bracket is provided on the chamber pressing portion, the first center plate portion, and the first center plate portion. It consists of a first opening hole, and the filter side fixing bracket is made up of a filter holding part, a second center plate part, and a second opening hole provided in the second center plate part, and the first opening hole And a chamber fixing bolt that is screwed into a mounting hole provided on a side surface of the chamber through the second opening hole, and at least one of the first opening hole and the second opening hole is a long hole. .

  Further, the other means has a housing fixing flange provided at the lower end of the filter side fixing bracket, an opening provided in the housing fixing flange, and a housing fixing bolt for fixing to the housing through the opening. Is.

As a result, it is possible to remove and install the filter in a short time by omitting the preparatory work for installing the filter. In addition, when multiple filters are stacked, the filter can be securely fixed to the chamber in a space-saving manner. A fan filter unit capable of directly and simply fixing the combined body to the housing is obtained.

ADVANTAGE OF THE INVENTION According to this invention, the filter attachment structure which has the effect of being able to join a chamber and one sheet or a plurality of filters simultaneously and easily can be provided.

Also, when mounting the fan filter unit combines the chamber and filter housing, Ru prevents detachment and lateral displacement of the chamber and the filter.

In addition, small, Ru can be prevented from leaving or lateral deviation in a space-saving.

  Moreover, when attaching and detaching the chamber pressing portion to and from the chamber, an effect that can be easily attached and detached without applying force is obtained.

  Further, since the fixing pressure at the time of fixing can be adjusted by adjusting the tightening degree of the chamber adjusting bolt, an effect of improving the sealing performance at the time of fixing the chamber and the filter can be obtained.

  Further, an effect of saving the sealing performance when the chamber and the filter are fixed can be obtained without providing an extra protrusion on the top surface of the chamber.

  Further, when the chamber and the filter are fixed, there is an effect that the chamber and the filter are securely fixed without being unsafely detached.

  Even when the thickness of the filter is changed or when a plurality of filters are used, the effect of being able to be easily fixed is obtained by sliding the chamber side fixture and the filter side fixture according to the thickness of the filter.

  In addition, it is possible to obtain an effect that the chamber and the filter can be fixed with a single fixing bracket, and the fan filter unit main body to which the chamber and the filter are fixed can be easily fixed to the housing without trouble.

Front view of Embodiment 1 of the present invention External perspective view of the fixing bracket Front view External perspective view of fixing bracket of Embodiment 2 of the present invention Front view Side view of Reference Example 1 Front view of Embodiment 3 of the present invention Front view of Embodiment 4 of the present invention Front view of Embodiment 5 of the present invention Front view of Embodiment 6 of the present invention External appearance perspective view of the fixing metal fitting of Embodiment 7 of the present invention Front view of Embodiments 7 and 8 of the present invention External appearance perspective view of the fixing metal fitting of Embodiment 8 of the present invention

According to the first aspect of the present invention, the chamber pressing portion that engages with the surface of the chamber at one end, the filter pressing portion that engages with the filter frame at the other end, the side surface of the chamber and the side surface of the filter. The filter is formed integrally with a C-shaped filter frame whose outer peripheral side is open, and the fixing bracket is provided with the filter holding portion on the downstream filter. After hanging on the upper end of the filter frame, the chamber holding part is hung on the top surface of the chamber, and the filter and the chamber are sandwiched , and it is necessary to attach a fixing bracket to the chamber in advance. In addition, the chamber and one or more filters can be easily joined at the installation site.

In addition, the fixing bracket has a pair of side surface holding portions erected from both ends of the central plate portion, and the side surface holding portions are provided close to the opposing side surfaces of the chamber and the filter, and the horizontal direction of the chamber and the filter It has the effect | action that it can maintain position of this and can prevent detachment | leave and a horizontal shift.

In addition, since the opening of the chamber holder is provided with an open-back shape, it can be easily attached or detached by applying a little force against the elastic force of the packing when the chamber holder is engaged with or disengaged from the chamber. Has the effect of being able to

In addition, a mounting hole is provided in the chamber pressing portion of the fixing bracket, and a chamber adjusting bolt that is screwed into the mounting hole and press-contacted with the chamber surface is provided. When the chamber and the filter are fixed, the chamber adjusting bolt is tightened. The fixing pressure at the time of fixing is adjusted according to the condition, and the sealing property and the coupling force can be improved.

In addition, a mounting hole is provided in the filter retainer of the fixing bracket, and it has a filter adjustment bolt that is screwed into this mounting hole and press-contacts with the back surface of the filter frame. The fixing pressure is adjusted by the degree of tightening of the filter adjusting bolt, and the effect of improving the coupling force between the chamber and the filter and the sealing performance can be realized in a small space.

In addition, a mounting hole for the chamber fixing bolt is provided on the side of the chamber, and an opening hole is provided in the central plate portion of the fixing bracket for passing the chamber fixing bolt, so that the fixing bracket is not easily removed by careless operation. The filter and the chamber can be securely fixed.

The fixing bracket includes a chamber-side fixing bracket and a filter-side fixing bracket. The chamber-side fixing bracket includes a chamber pressing portion, a first center plate portion, and a first opening hole provided in the first center plate portion. The filter side fixing bracket is composed of a filter pressing portion, a second center plate portion, and a second opening hole provided in the second center plate portion, and the first opening hole and the second center plate portion. It has a chamber fixing bolt that is screwed into a mounting hole provided on the side surface of the chamber through the opening hole, and at least one of the first opening hole and the second opening hole is an elongated hole, Even when the thickness is changed or the number of filters is increased or decreased, the chamber side fixing bracket and the filter side fixing bracket can be adjusted and fixed by sliding them within the dimension range of the long hole. .

In addition, it has a housing fixing flange provided at the lower end of the filter side fixing bracket, an opening provided in the housing fixing flange, and a housing fixing bolt for fixing to the housing through the opening. With the two fixing brackets, the chamber and the filter can be coupled, and the fan filter unit main body to which the chamber and the filter are fixed can be easily fixed to the housing without taking time and effort.
Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
As shown in FIGS. 1 to 3, a fan unit 3 composed of a fan 1 and a motor 2 is built in a chamber 4, and a packing 5 made of an elastic material such as rubber is disposed downstream of the fan unit 3 and one or more filters 6. And the fan filter unit 7 is formed by connecting with a fixing bracket 11 having a U-shaped cross section.

The fixing fitting 11 is in contact with the side surface of the chamber 4 and the side surface of the filter 6, the chamber pressing part 10 that engages the surface of the chamber 4 at one end, the filter pressing part 10 that engages with the filter frame 12 at the other end, or It consists of the adjacent central plate part 9 and is connected so as to sandwich the surface of the chamber 4 and the C-shaped filter frame 12 provided on the side surface of the filter 6.

  In the above configuration, as shown in FIG. 3, first, the fixing bracket 11 is inclined and the filter holder 10 is engaged with the filter frame 12, and the chamber holder 8 is rotated with the filter holder 10 side as a fulcrum. By engaging the surface of the chamber 4 in a pressure contact state, the chamber 4 and the filter 6 can be sandwiched and coupled. At this time, since the packing 5 is interposed between the chamber 4 and the filter 6, the sealing property between the chamber and the filter 6 is reliably ensured by the elastic force of the packing 5.

  Further, by sticking a tape made of Teflon (registered trademark) or the like on the surface of the chamber 4 to the joint with the chamber pressing portion 8, the chamber pressing portion 8 is made to be smooth due to the smoothness of the tape surface when the fixture 11 is attached or detached. Since it slides easily, it is possible to reduce the force required for attaching and detaching, and workability is improved.

(Embodiment 2)
As shown in FIGS. 4 and 5, a pair of side surface holding portions 13 parallel to the left and right ends of the central plate portion 9 of the fixing bracket 11 a are projected. Slightly larger than the width dimension.

  In the above configuration, when the filter retainer 10 of the fixing bracket 11 a is engaged with the filter frame 12 and the chamber 4 and the filter 6 are sandwiched and coupled, the pair of side retainers 13 are close to the side surfaces of the chamber 4 and the filter 6. Therefore, the chamber 4 and the filter 6 are prevented from moving in the horizontal direction, and the chamber 4 and the filter 6 can be prevented from being detached or displaced.

( Reference Example 1 )
As shown in FIG. 6, the width a of the filter holder 10 a is slightly smaller than the opening width b of the filter frame 12, and the clearance is 2 mm or less, so that the filter holder 10 a The dimensions are such that they enter the inside through a slight gap.

  In the above configuration, the size of the filter holding portion 10 a is restricted by the opening portion of the filter frame 12, so that the fixing bracket 11 can be prevented from being displaced from side to side with respect to the filter 6.

  Further, when the fixing bracket 11 has the side pressing portion 13, the fixing bracket 11 can prevent the left and right movements of the chamber 4, and can surely prevent the positional deviation between the chamber 4 and the filter 6. it can.

(Embodiment 3 )
As shown in FIG. 7, an opening-shaped portion 8 a having an open shape is formed at the distal end portion of the chamber pressing portion 8.

  In the above-described configuration, when the fixing bracket 11 is attached to the chamber 4 by forming the dog-leg portion 8 a at the tip portion of the chamber pressing portion 8, the tip portion of the chamber pressing portion 8 contacts the surface of the chamber 4. Therefore, the chamber pressing portion 8 can be easily engaged without becoming difficult to enter or damaging the chamber 4. Further, when removing the fixing bracket 11, it can be easily removed by applying a fingertip to the dog-leg portion 8 a of the chamber pressing portion 8 and rotating it so as to pull it up.

(Embodiment 4 )
As shown in FIG. 8, a mounting hole 14 is provided in the chamber pressing portion 8 of the fixture 11, and a chamber adjusting bolt 15 that is screwed into the mounting hole 14 and press-contacted with the surface of the chamber 4 is provided.

  In the above configuration, by tightening the chamber adjustment bolt 15, the packing between the chamber 4 and the filter 6 is contracted and pressed, and the packing between the chamber 4 and the filter 6 can be pressed to improve the sealing performance.

(Embodiment 5 )
As shown in FIG. 9, a mounting hole 16 is provided in the filter holding portion 10 of the fixing bracket 11, and a filter adjusting bolt 17 that is screwed into the mounting hole 16 and press-contacted with the back surface 12 a of the filter frame is provided.

  In the above configuration, by tightening the filter adjustment bolt 17, the distance between the surface of the chamber 4 and the filter frame 12 is shortened, so that the sealing performance between the chamber 4 and the filter 6 can be improved and the filter adjustment is performed. Since the bolts 17 are provided in the C-shaped filter frame 12, no extra protrusion is generated on the outer peripheral portion of the fan filter unit 7, and space saving can be achieved.

(Embodiment 6 )
As shown in FIG. 10, a mounting hole 19 for the chamber fixing bolt 18 is provided on the side surface of the chamber 4, and an opening hole 20 through which the chamber fixing bolt 18 is passed is disposed in the central plate portion 9 of the fixing bracket 11.

  In the above configuration, when the chamber 4 and the filter 6 are fixed, the fixing metal 11 is securely fixed to the fan filter unit 7 by tightening with the chamber fixing bolt 18.

  Note that the fan filter unit 7 and the fixing bracket are formed by making the tip portion of the chamber pressing portion 8 into an open-shaped, U-shaped portion 8a and the tip portion of the filter holding portion 10 as a curved portion 10b having a curved structure. 11 can be prevented from being inadvertently detached, and can be easily attached / detached without applying a large force when attaching / detaching the chamber retainer 8 to / from the chamber 4. Can be fixed securely.

(Embodiment 7 )
As shown in FIGS. 11 and 12, the fixture 11 includes a chamber-side fixture 21 and a filter-side fixture 22, and the chamber-side fixture 21 includes the chamber holding portion 8, the first central plate portion 23, It consists of a first opening hole 24 provided in the first central plate portion 23, and the filter side fixing bracket 22 is provided in the filter holding portion 10, the second central plate portion 25, and the second central plate portion 25. And a chamber fixing bolt 18 that is screwed into a mounting hole 19 provided on the side surface of the chamber 4 through the first opening hole 24 and the second opening hole 26. 24 and the second opening hole 26 are elongated holes.

  In the above configuration, the chamber-side fixture 21 and the filter-side fixture 22 are slidable, and the chamber fixing bolts 18 are placed in the first opening hole 24 and the second opening hole 26 in accordance with the thickness of the filter. By sliding and adjusting and tightening, even if the thickness of one filter 6 changes or when a plurality of filters 6 are stacked, it can be easily and reliably fixed regardless of the thickness of the filter 6. .

(Embodiment 8 )
As shown in FIGS. 12 and 13, a housing fixing flange 27 provided at the lower end of the filter-side fixing bracket 22, an opening 28 provided in the housing fixing flange 27, and a housing 29 through the opening 28. A case fixing bolt 30 for fixing is provided.

  In the above configuration, when the fan filter unit 7 having the chamber 4 and the filter 6 fixed so as to be sandwiched between the chamber-side fixing bracket 21 and the filter-side fixing bracket 22 is fixed to the casing 29, the casing 29 surface and the casing are fixed. By abutting the flange 27 and fixing the casing 29 and the casing fixing flange 31 with the casing fixing bolt 30, the fan filter unit 7 main body can be easily fixed to the casing easily without trouble. Can do.

  The present invention can also be applied to applications in which only a plurality of filters are connected in a state where packing is interposed using a fixing bracket.

DESCRIPTION OF SYMBOLS 1 Fan 2 Motor 3 Fan unit 4 Chamber 5 Packing 6 Filter 8 Chamber pressing part 8a U-shaped part 9 Center plate part 10 Filter holding part 11 Fixing bracket 11a Fixing bracket 12 Filter frame 13 Side pressing part 14 Mounting hole 15 Chamber adjustment bolt 16 mounting hole 17 filter adjusting bolt 18 chamber fixing bolt 19 mounting hole 20 opening hole 21 chamber side fixing bracket 22 filter side fixing bracket 23 first central plate portion 24 first opening hole 25 second central plate portion 26 second Opening hole 27 Housing fixing flange 28 Opening 29 Housing 30 Housing fixing bolt

Claims (8)

A chamber containing a fan unit consisting of a fan and a motor;
A filter comprising at least one sheet disposed on the downstream side of the fan unit;
An elastic packing inserted between the filter and the chamber;
It has a bracket with a U-shaped cross section,
The fixing bracket includes a chamber pressing portion that engages the surface of the chamber at one end, a filter pressing portion that engages the filter frame at the other end, and a central plate that is in contact with or close to the side surface of the chamber and the side surface of the filter. And consists of
The filter is configured integrally with a C-shaped filter frame whose outer peripheral side is open,
The fixing bracket is configured to hang the filter holding portion on the upper end portion of the filter frame provided on the downstream filter, and then hang the chamber holding portion on the top surface of the chamber to connect the filter and the chamber. A fan filter unit that is sandwiched and joined. The fan filter unit according to claim 1, wherein the fixing bracket has a pair of side surface holding portions provided upright from both ends of the central plate portion, and the side surface holding portions are provided in close proximity to the opposing side surfaces of the chamber and the filter. The fan filter unit according to claim 1 or 2, wherein an opening-shaped dogleg portion is provided at a front end portion of the chamber pressing portion. The fan filter unit according to claim 1 or 2, wherein a mounting hole is provided in the chamber pressing portion of the fixing bracket, and a chamber adjusting bolt is provided which is screwed into the mounting hole and press-contacted with the chamber surface. The fan filter unit according to claim 1 or 2, further comprising: a filter adjusting bolt which is provided with a mounting hole in the filter holding portion of the fixing metal and is screwed into the mounting hole and press-contacted with the back surface of the filter frame. The fan filter unit according to claim 1 or 2, wherein a mounting hole for a chamber fixing bolt is provided on a side surface of the chamber, and an opening hole for allowing the chamber fixing bolt to pass through a central plate portion of the fixing bracket.
That . The fixture includes a chamber-side fixture and a filter-side fixture. The chamber-side fixture includes a chamber retainer, a first center plate, and a first opening hole provided in the first center plate. The filter-side fixture includes a filter holding portion, a second center plate portion, and a second opening hole provided in the second center plate portion, and the first opening hole and the second opening hole. The fan filter unit according to claim 6 , further comprising a chamber fixing bolt that is screwed into a mounting hole provided on a side surface of the chamber through which at least one of the first opening hole and the second opening hole is an elongated hole. A housing securing flange provided at the lower end of the filter side fixing bracket, the a housing fixed flange provided openings, of the through openings made with a casing fixing bolt for fixing to the housing claim 7, wherein Fan filter unit .

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