CZ286822B6 - Filtering casing - Google Patents

Abstract

The proposed filtering casing (R) has a jacket (1) in which a filter element (9) with a frame (13) bears, optionally via a sealing section (10) against a bearing angle (6). The jacket (1) is provided with an attachment flange (32.1) for attaching to air distribution system. In the jacket (1) corners, corner angles (16) reach in detachable manner into pockets (19) that are attached to the jacket (1), whereby a threaded pin (2O) passing through the corner angle (16) tightens thereof on the other side of the sealing section (10) to the filter element (9) frame (13). The filter element (9) bears, optionally through the mediation of a supporting foot (23) against a diagonal strut (15) with which an outlet element (25) is connected through the mediation of cross beam (30).

Description

Filter housing

Technical field

BACKGROUND OF THE INVENTION The invention relates to a filter housing with a housing in which the filter element with the frame, optionally over a sealing profile, abuts a contact angle, the housing being provided with a connecting flange for connection to an air distribution system and detachably extending into the corners of the housing The angle bracket extends through the corner bracket by means of which the corner bracket on the other side of the sealing profile is pulled to the filter insert frame.

BACKGROUND OF THE INVENTION

Filter housings are known in a number of different shapes and designs. They are used primarily in hospitals, intensive care stations and operating theaters, in the manufacture of electronic components, in nuclear technology and in biologically clean rooms. These filter housings are used to filter out any impurities from the air introduced into the space.

In the prior art filters, due to the problems of mounting the filter element, large filter housings are used in which relatively small filter elements are present. This loses considerable space.

Maintenance of such filter housings is also problematic, since either the entire system must be shut down during dismantling or contaminated air enters the clean room during maintenance work, which is undesirable.

SUMMARY OF THE INVENTION

This object is solved and the drawbacks of known filter housings of this kind largely eliminate a filter housing with a housing in which the filter element with the frame or over the sealing profile abuts the contact angle, the housing being provided with a connecting flange for connection to an air distribution system. the corners of the housing detachably engage corner angles in the pockets that are attached to the housing, the corner angular extending through a bolt through which the corner angular on the other side of the sealing profile is pulled to the filter cartridge frame.

Due to this special corner angle, the attachment of the filter element inside the filter housing is greatly facilitated. In addition, the dimensions of the filter element can almost correspond to the internal dimensions of the filter housing, so that no space is lost. Thus, a relatively large filter element can be used with a relatively small filter housing.

The individual corner angles preferably consist of two horizontal arms extending perpendicular to each other and vertical arms extending into the pockets, while a screw pin is mounted in the horizontal arms.

This situation occurs when the filter element is inserted into the filter housing, where the filter element abuts the contact angles. The screw pin can be pulled down from below against the filter element frame.

To guide this bolt, the corner bracket is provided with a threaded sleeve through which the bolt pivots. It is also possible to make the thread directly in the corner angle.

-1 CZ 286822 B6

The principle of the solution of the filter housing according to the invention consists in that the screw pin, possibly by means of a support foot, bears against a diagonal strut which bridges the filter element.

Thus, the diagonal strut bridges the filter cartridge and is pressed against the frame of the filter cartridge in two opposite corners by the respective bolt pins. The diagonal strut serves to hold the outlet insert, the diagonal strut also at least interfering with the air outlet of the filter element.

It is advantageous if the output insert is connected to the diagonal strut by means of a cross beam according to DE-OS 43 36 806.9. Particular emphasis is placed on this solution and its features in connection with the cross beam. In this way, the concealed attachment of the outlet insert is achieved in the simplest way. Due to the cross beam, the respective drain plate is mounted at multiple locations so that it is possible for the drain plate and the entire outlet insert to be arranged flat on the housing of the filter housing.

Another aspect of the invention relates to improved maintenance. In the case of a filter housing with a housing in which the filter element with the frame or over the sealing profile abuts the contact angle, and the housing is provided with a connecting flange for connection to an air distribution system, according to the invention the rod outside the connecting flange is connected to the adjusting lever. The shut-off flap can be operated from the outside or from the bottom of the filter element. A rotating rod protrudes downward from the shutter to which the adjusting lever is mounted. This adjusting lever is accessible from below through a plug-in opening in the housing of the filter housing and can be manually adjusted. This manual actuation of the adjusting lever allows the maintenance box to be completely closed on the air inlet side, so that no more air is supplied to the maintenance insert. As a result, no air pollution in the clean room can occur. Maintenance work, ie removing the filter element and cleaning it, can then be carried out without any problems. After the cleaned filter element has been fitted, it is only necessary to open the shut-off flap by hand again, so that the filter housing is immediately fully operational. No pneumatic or electric set-up motors with demanding wiring are required, and inspection holes and the like can also be omitted. This has a very positive effect on the production of the filter housing and especially on its price.

Preferably, the adjusting lever extends below the filter insert into the housing.

A further advantage of the solution according to the invention is that no sealant, for example a silicone sealant, is used in the entire filter housing. This applies especially to the air supply area. This also has a favorable effect on the production of the filter housing.

Overview of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The invention is illustrated by the following non-limiting examples, which are described in the accompanying drawings, which show:

1 shows a section through a filter housing according to the invention; FIG.

FIG. 2 is a side view of the filter housing of FIG. 1;

FIG. 3 is a cross-sectional view of another embodiment of a filter housing according to the invention;

FIG. 4 is a partial side view of the filter housing of FIG. 3;

FIG. 5 is a partial bottom view of the filter housing of FIG. 3, without the outlet insert;

FIG. 6 is a perspective view of the fasteners in the filter housing of FIGS. 1 to 4.

-2GB 286822 B6

DETAILED DESCRIPTION OF THE INVENTION

The filter housing R according to the invention has, according to FIG. 1, a rectangular or square casing 1, for example on the ceiling.

The upper cover plate 2 is joined on all sides by side walls 4, which are preferably made integrally with the upper cover plate 2 from which they are bent. In this case, only the corners of these side walls 4 are connected to each other. Approximately in the middle of each side wall 4, a bend 5 is formed into which the contact angle 6 is inserted and received therein.

The side walls 4 together define an insertion opening 7, the peripheral edge 8 of which extends from the outside. This insertion opening 7 is fitted with a filter insert 9 which abuts the abutment angle 6 with a U-shaped sealing profile 10. with the contact angle 6 forms a control groove 11 into which the tube 12 opens. With this tube 12 the tightness of the seating of the filter element 9 on the contact angle 6 can be checked. If the sealing profile 10 does not fit tightly on the contact angle 6, air can enter the control groove. 11, from where it is discharged through the tube 12 to the other side of the filter element 9. If a corresponding measuring device is connected to the tube 12, this air leakage can be detected.

The filter element 9 is further provided with a wooden frame 13 on the periphery, the inner edge edges of which are sealed by a sealing profile 10. The filter frame 14 is surrounded by a wooden frame 13.

A diagonal strut 15 is used to hold the filter element 9, which is pressed against the wooden frame 13 at two diagonally opposite corners. This is provided by the special corner angles 16 shown in FIG. 6. Each of the corner angles 16 consists of two angles extending approximately perpendicular to each other, with both the horizontal arms 17.1 and 17.2 and the vertical arms 18.1 being connected to each other. and 18.2. In the working position, the vertical arms 18.1 and 18.2 extend into the pockets 19.1 and 19.2, which are attached to the inner sides of the adjacent side walls 4. For simplicity, the pockets 19 are each formed by a profile whose one strip is bent by almost 180 °. This creates a plug-in hole into which the vertical arms 18.1 and 18.2 of the corner bracket 16 can be inserted.

A corner pin 16 of the corner bracket 16 is provided with a bolt head 21 with a hexagonal bore 22 at one end. At the opposite end, the bolt pin 20 is provided with a support foot 23 which is pressed against the diagonal strut 15 in its operating position. It is also possible for an internal threaded hole to be formed directly in the corner bracket 16 so that the threaded sleeve 24 can then be used as a counter nut.

The diagonal strut 15 serves to hold the output insert 25, as described, for example, in DE-OS 43 36 806.9. The outlet insert 25 is provided with an outlet plate 26 with air slots not shown here, which are arranged in the manner of a clock dial, the air slots being provided with air guide plates 27 which extend between the insert plates 28 and the support plates 29. Through corresponding openings the crossbeam 30 is inserted in the support plates 29, from which the threaded pin 31 protrudes approximately in the middle. The threaded pin 31 is screwed into the diagonal strut 15, whereby the entire outlet insert 25 is retained in the insertion hole 7. 8.

The filter housing R is, according to FIGS. 1 and 2, provided with a rectangular connection flange 32 for connection to an air distribution system (not shown).

-3GB 286822 B6

Preferably, however, a round connection flange 32.1 is disposed in the side wall 4.3 according to FIGS. 3 to 5 and in which a shut-off flap 33 is provided. This shut-off flap 33 is provided with two pivot pins 34.1 and 34.2 which are both rotatably mounted. in the walls of the connecting flange 32.1. The pivot pin 34.2 is connected to a pivot rod 35 which extends into an angle cover 36, which is disposed somewhat below the filter element 9 on the side wall 4.3. In the angle cover 36, an adjusting lever 37 extends from the pivot rod 35. 5, accessible through the slot 7. By turning this adjusting lever 37, the closing flap 33 can be opened or closed. The position of the adjusting lever 37 relative to the filter insert 9 or the wooden frame 13 is preferably chosen such that the wooden frame 13 normally prevents adjusting the adjusting lever 37. In order to adjust the adjusting lever 37, the adjusting lever 37 must be lifted a little to be able to slide along the upper edge of the wooden frame 13.

The angle cover 36 can also be opened downward as indicated in FIG. 5. In this way, the shut-off flap 33 can be closed before removal of the outlet insert 25.

In Fig. 4 it is indicated that the shutter flap 33 is provided with a rubber flap seal 38 to allow the flange 32.1 to close tightly.

In addition to checking the tightness of the seating by means of the tube 12, another differential pressure tube can be used. This measuring tube (not shown) extends through the contact angle 6 and extends downwardly beyond the filter element 9. If a corresponding measuring instrument is connected to this measuring tube, the pressure in the filter housing R upstream of the filter element 9 can be measured and compared with the pressure behind the filter element. 9.

Claims (2)

PATENT CLAIMS A filter housing with a housing in which the filter element with the frame, optionally over a sealing profile, abuts a contact angle, the housing being provided with a connecting flange for connection to the air distribution system and extensibly extending into the corners of the housing attached to the housing , the corner bracket extends through the corner bracket by which the corner bracket on the other side of the sealing profile is pulled to the filter insert frame, characterized in that the screw bracket (20), possibly by means of a support foot (23), bears diagonally a brace (15) bridging the filter element (9), the outlet element (25) being connected to the diagonal brace (15) by means of a cross beam (30). Filter housing according to claim 1, characterized in that a shut-off flap (33) is provided in the connecting flange (32.1) and connected to the adjusting lever (37) by means of a pivot rod (35) outside the connecting flange (32.1). this adjusting lever (37) extends below the filter element (9) into the housing (1).