FILTER APPARATUS

Abstract

A filter apparatus connected a container, where the container includes a container neck and is filled with a filling material. The filter apparatus includes a filtrate riser tube in the container, which extends from the base region of the container to the container neck, a container connector head, which is fastened to the container neck and defines passages connected to a liquid inlet line and an inlet filter, and a connector unit with a sealing piston in the connector unit, which is arranged so as to be lowerable to connect the liquid inlet line to the filter material in the container and the filtrate riser tube to the filtrate outlet line.

Claims

1. A filter apparatus apparatus a container including a container neck where the container is filled with a filter material, the filter apparatus comprising; a filtrate riser tube in the container, which extends from the base region of the container to the container neck; a container connector head, which is fastened to the container neck and affords passages, which are connected to a liquid inlet line and an inlet filter and a connector unit with a sealing piston in the connector unit, which is arranged to be lowerable in order to connect the liquid inlet line to the filter material in the container and the filtrate riser tube to the filtrate discharge line.

2. The filter apparatus as claimed in claim 1, wherein the container is produced in a blow-molding process and has a spherical or bottle-shaped shape.

3. The filter apparatus as claimed in claim 1, wherein the filtrate riser tube is inserted into a layer of a hydrophilic foam material or filter fleece arranged on the base of the container and, on the inserted end section, affords holes for the entry of filtered filtrate into the filtrate riser tube.

4. The filter apparatus as claimed in claim 1, wherein the upper end region of the filtrate riser tube is held in a stopper, which closes the container neck, wherein the upper end of the filtrate riser tube protrudes out of the stopper.

5. The filter apparatus as claimed in claim 4, wherein the stopper consists of a foamed material or filter fleece, through which the liquid to be filtered can flow.

6. The filter apparatus as claimed in claim 1, wherein the container connector head is either screwed onto the container neck or is pushed on up to an abutment and releasably locked.

7. The filter apparatus as claimed in claim 1, wherein the sealing piston is arranged centrally in a connector unit of the container connector head and is mounted in the container connector head so as to be vertically slidable and is sealingly connected to the filtrate riser tube in the lowered position.

8. The filter apparatus as claimed in claim 1, wherein the upper end of the sealing piston is in drive connection with an eccentric, which can move the sealing piston upwardly and downwardly by a lever which is pivotally mounted on the connector unit of the container connector head.

9. The filter apparatus as claimed in claim 1, further comprising an elongate blind bore formed in the sealing piston, wherein the elongate blind bore extends from the lower end of the sealing piston and is connected at the upper, closed end region to a transverse bore extending in the transverse direction through the sealing piston.

10. The filter apparatus as claimed in claim 1, further comprising two passages, which are provided with external hose connections, extend spaced above one another transversely through the connector unit of the container connector head to the sealing piston.

11. The filter apparatus as claimed in claim 10, whereinc the upper passage is connected to the transverse bore in the sealing piston, in the lowered position of the sealing piston, so that filtrate can flow out.

12. The filter apparatus as claimed in claim 1, wherein the lower passage is connected, in the lowered position of the sealing piston, to an annular gap, which extends around the sealing piston and extends to the lower end of the container connector head so that supplied liquid can flow out of the annular gap through the stopper into the interior of the container.

13. The filter apparatus as claimed in claim 1, further comprising a venting passage with a venting valve extends from the exterior through the connector unit of the container connector head to an annular gap and that the venting valve affords an actuating head, which opens the venting valve, when a pressure force is exerted.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Further details of the invention will be apparent from the following description of one preferred embodiment and with reference to the drawings, in which:

[0028] FIG. 1 shows an embodiment of the filter apparatus in accordance with the invention and

[0029] FIG. 2 shows an enlarged view of the filter apparatus of FIG. 1.

[0030] FIG. 3 shows a fragmentary view of the filter apparatus of FIG. 2.

[0031] FIG. 4 shows an enlarged view of the filter apparatus of FIG. 1.

[0032] FIG. 5 shows an enlarged view of the sealing piston of the filter apparatus of FIG. 1.

[0033] FIG. 6 shows an enlarged view of the filter riser tube of the filter apparatus of FIG. 1.

DETAILED DESCRIPTION

[0034] The container/filter bottle (1) with the transparent bottle (36), the container neck (12) with its beads or screwthreads (33) and the container connector head (2) secured to it.

[0035] The lower end of the filtrate riser tube (3) is positively connected to the perforated base (4) and its upper end is firmly connected in a locking manner (34) in the container connector head (2) and to a groove (10).

[0036] A separate, external connector unit (14) is pushed with a receiving groove (22) into the receiving collar (23) on the container connector head (2) and can be sealingly secured by means of an eccentric lever (15).

[0037] The filter bottle (1) is filled with filter medium (6). When using different filter media, these can be separated by separation layers (37).

[0038] For the purpose of connecting the connector unit (14), the eccentric lever (15) is pivoted to the right through 180 from the illustrated position and the eccentric pressure pin (16), which is secured in the eccentric (24), thereby pulls a sealing piston (21) upwardly and releases the squeezed container lip seal (17). The connector unit (14) with the horseshoe-shaped groove (22) can thus be released from the receiving collar (23) on the container connector head or pushed onto it.

[0039] The filtration process is initiated with the container connector head (2) with the connector unit (14) connected. The container lip seal (17) produces a sealing, positive connection. The liquid flows via the liquid inlet connector (31), which can also be constructed in the form of a coupling, externally of the sealing piston (21) via annular gap (32) and kidneys (29) through an upper filter screen (5) and perforated openings in the container connector head into the filter medium downwardly towards the perforated base (4).

[0040] The liquid flows through the perforated base to the openings (8) in the filtrate riser tube (3). These openings can also have other geometries. The liquid is conducted through the filtrate riser tube (3) upwardly to a bore in the sealing piston (35) and is there conducted further to the connector unit via a filtrate bore (27) and filtrate groove (26) via the connector (18).

[0041] The lower end of the sealing piston (21) engages, sealed by an 0-ring, in the filtrate riser tube (3). The stepped construction of the bore (35) can be constructed to geometrically match the filtrate riser tube (3) to form connections free of the risk of confusion.

[0042] Sealing with respect to the surroundings is prevented by the four sealing rings (20). Air situated in the container (1) can be guided via a positioned air outlet opening (30), inlet kidneys (29) and annular gap (32) to the venting valve (19). Air or air-water mixture can be conducted via a line (39) to the exterior by pressing the venting valve.

[0043] Used or depleted filter medium (6) can be detected by means of conductivity, volumetric or other measuring techniques. For the purpose of disconnection of the filter bottle (1), the eccentric lever (15) is fully pivoted, as described above, and the pressure collar (28) on the sealing piston (21) thus releases the container lip seal (17).

[0044] The filter container (1) with the container connector head (2) can be separated from the connector unit (14). As a result of the sealing piston (21) being pulled upwardly, the four O-rings (20) seal the filtrate outlet (18) and also the liquid inlet (31). Discharge of liquid in the disconnected state is thus prevented.