Filter cartridge and an assembly of a filter housing and at least one such filter cartridge

• US 7,445,711 B2
• Filed: 10/23/2003
• Issued: 11/04/2008
• Est. Priority Date: 10/23/2002
• Status: Active Grant

• Current Assignee: Indufil BV (Indufil B)
• Original Assignee: Indufil BV (Indufil B)
• Inventors: Pas, Peter Alexander Josefus, Greter, Frits Nicolaas Johannes Jacobus
• Primary Examiner(s): KIM, SUN U
• Application Number:
  US10/532,410
• Publication Number:
  US 20060006110A1
• Time in Patent Office: 1,839 Days
• Field of Search: 210/295, 210/314, 210/316, 210/323.1, 210/323.2, 210/335, 210/348, 210/417, 210/338, 210/437, 210/497.01, 210/304, 210/456
• US Class Current: 210/314
• CPC Class Codes: B01D 2201/0438 mounted substantially vertically on plates at the lower side of the filter elements
• CPC Class Codes: B01D 2201/188 Multiple filtering elements having filtering areas of different size
• CPC Class Codes: B01D 29/15 arranged for inward flow filtration
• CPC Class Codes: B01D 29/52 in parallel connection
• CPC Class Codes: B01D 29/902 containing fixed liquid displacement elements or cores
• CPC Class Codes: B01D 46/0005 Mounting of filtering elements within casings, housings or frames B01D46/2422 takes precedence
• CPC Class Codes: B01D 46/2411 Filter cartridges
• CPC Class Codes: B01D 46/58 connected in parallel

Abstract

The invention relates to an assembly with a filter housing and at least one filter cartridge. The at least one filter cartridge is tubular, has a tube wall provided with a filter and comprises a central discharge channel with a discharge connection for discharge of filtered medium. The tube wall has a filter through which the medium to be filtered is able to flow transversely to the tube wall. The filter housing has a filter chamber, surrounded by a side wall, in which the at least one filter cartridge is accommodated with the longitudinal direction parallel to the side wall. The invention furthermore is directed to a filter cartridge intended for such an assembly.

Claims

1. An assembly comprising a filter housing and at least one filter cartridge,

wherein the at least one filter cartridge is tubular, has a tube wall and a central discharge channel with a discharge connection for discharging filtered medium,

wherein the tube wall comprises filter means through which medium to be filtered is able to flow transversely to the tube wall;

wherein the filter housing comprises a filter chamber surrounded by a side wall, in which the at least one filter cartridge is accommodated with the longitudinal direction parallel to the side wall;

wherein the filter chamber has at least one outlet per filter cartridge to which the discharge connection of the respective filter cartridge is connected;

wherein the side wall of the filter chamber is provided with at least one inlet for feeding in the medium to be filtered, which inlet opens into the filter chamber at a level that is traversed by the at least one filter cartridge; and

wherein when viewed in the transverse direction of the filter cartridge and at the level of the inlet, the shortest distance (X) from the filter cartridge to the side wall is, viewed in the transverse direction of the filter cartridge and below or above the level of the inlet, greater than the shortest distance (Y) from the filter cartridge to the side wall.

2. The assembly according to claim 1, wherein when viewed in the longitudinal direction of the filter cartridge, the relative enlargement (X minus Y) of the shortest distance from the filter cartridge to the side wall at the level of the inlet extends over a length of approximately the height of the inlet or more.

3. The assembly according to claim 1, wherein the shortest distance X from the filter cartridge to the side wall is defined by the equation:

$X\ge <br><br>\frac{1}{2}<br><br>\left(\frac{A}{2<br><br>Q}\right)$

where

A=surface area of inlet, and

Q=height of the region with larger shortest distance X.

4. The assembly according to claim 1, wherein the shortest distance X from the filter cartridge to the side wall is defined by the equation:

$X\ge <br><br>\left(\frac{A}{2<br><br>Q}\right)$

where

A=surface area of inlet, and

Q=height of the region with larger shortest distance X.

5. The assembly according to claim 3, wherein the inlet is circular with a diameter D₁ and wherein the shortest distance X is given by X≧

½

$\frac{\mathrm{\Pi <br><br>}<br><br><br><br>D_1}{8}.$

6. The assembly according to claim 1, wherein A<

B(Y), preferably A≦

2B(Y)

where;

A=surface area of inlet, and

B=as a function of Y, the surface area of the internal cross-section of the filter housing minus the sum of the cross-sectional surface areas of the filter cartridges at a level above or below the inlet.

7. The assembly according to claim 1, wherein a single cylindrical filter cartridge is provided that is arranged centrally in the cylindrical filter housing, and where:

$A<<br><br>\frac{\mathrm{\Pi <br><br>}}{4}<br><br>\left(D_3^2-D_2^2\right),$

where

A=surface area of inlet

D₃=internal diameter of filter housing

D₂=external diameter of filter cartridge.

8. The assembly according to claim 1, where:

$Y<<br><br>\frac{\sqrt{A}}{3.5},$

where

A=surface area of inlet.

9. The assembly according to claim 1, wherein the inlet is circular with diameter D₁;

and where

$Y<<br><br>0.75<br><br>\left(\frac{D_1}{4}\right).$

10. The assembly according to claim 1, wherein the filter housing is cylindrical with internal diameter D₃ and, at least conceptually for the purposes of the design, contains a single centrally arranged cylindrical filter cartridge and wherein the inlet is circular with diameter D₁, or at least has a surface area that is equal to a circular surface of diameter D₁, and wherein the following applies for the diameter D₂ of the filter cartridge, D₃ and D₁:

D₁²=2(D₃²−

D₂²).

11. The assembly according to claim 1, wherein:

A is less than or equal to the sum of the internal cross-sectional surface areas of the filter cartridges,

where

A=surface area of inlet.

12. The assembly according to claim 1, wherein the enlargement (X minus Y) of the shortest distance from the filter cartridge to the side wall at the level of the inlet has been obtained by constriction of the tube wall at that level.

13. The assembly according to claim 1, wherein the enlargement (X minus Y) of the shortest distance from the filter cartridge to the side wall at the level of the inlet has been obtained by making the side wall recessed at that level.

14. The assembly according to claim 1, wherein the tube wall is impermeable to the medium to be filtered in the region where the shortest distance from the filter cartridge to the wall has been enlarged.

15. The assembly according to claim 1, wherein the assembly comprises 3, 4 or more of said filter cartridges, which are arranged next to one another, parallel to one another.

16. The assembly according to claim 1, wherein the level of the inlet is located in the region from 25% to 75% of the length of the filter cartridge.

17. The assembly according to claim 1, wherein the filter means are equipped to filter a medium in the form of a fluid.

18. The assembly according to claim 1, wherein the filter means are equipped to filter a gaseous medium.

19. The assembly according to claim 1, wherein the filter cartridge is made as a fine filter on the one side of the inlet and is made as a coarse filter on the other side.

20. The assembly according to claim 19, wherein the fine filter is at least 5 times finer than the coarse filter.

23. The assembly according to claim 3, wherein the inlet is circular with a diameter D₁ and wherein the shortest distance X is given by X≧

$\frac{\mathrm{\Pi <br><br>}<br><br><br><br>D_1}{8}.$

24. The assembly according to claim 7, wherein a single cylindrical filter cartridge is provided that is arranged centrally in the cylindrical filter housing, and where:

$A<br><br>\underset{\_}{<<br><br>}<br><br>2<br><br>\frac{\mathrm{\Pi <br><br>}}{4}<br><br>\left(D_3^2-D_2^2\right).$

25. The assembly according to claim 1, wherein the inlet is circular with diameter D₁;

and where

$Y<<br><br>0.4<br><br>\left(\frac{D_1}{4}\right).$

26. The assembly according to claim 1, wherein the inlet is circular with diameter D₁;

and where

$Y<<br><br>0.15<br><br>\left(\frac{D_1}{4}\right).$

21. A filter cartridge intended for use with a filter housing, wherein the filter cartridge is tubular, has a tubular wall and a central discharge channel with a discharge connection for discharging filtered medium, wherein the tube wall comprises filter means through which medium to be filtered is able to flow transversely to the tube wall;

wherein the filter housing comprises a filter chamber surrounded by a side wall, in which the at least one filter cartridge is accommodated with the longitudinal direction parallel to the side wall;

wherein the filter chamber has at least one outlet per filter cartridge to which the discharge connection of the respective filter cartridge is connected;

wherein the side wall of the filter chamber is provided with at least one inlet for feeding in the medium to be filtered, which inlet opens into the filter chamber at a level that is traversed by the at least one filter cartridge; and

wherein when viewed in the transverse direction of the filter cartridge and at the level of the inlet, the shortest distance (X) from the filter cartridge to the side wall is, viewed in the transverse direction of the filter cartridge and below or above the level of the inlet, greater than the shortest distance (Y) from the filter cartridge to the side wall.

22. A diesel engine provided with a fuel filter comprising a filter cartridge, wherein the filter cartridge is tubular, has a tubular wall and a central discharge channel with a discharge connection for discharging filtered medium, wherein the tube wall comprises filter means through which medium to be filtered is able to flow transversely to the tube wall;

wherein the filter housing comprises a filter chamber surrounded by a side wall, in which the at least one filter cartridge is accommodated with the longitudinal direction parallel to the side wall;

wherein the filter chamber has at least one outlet per filter cartridge to which the discharge connection of the respective filter cartridge is connected;

wherein the side wall of the filter chamber is provided with at least one inlet for feeding in the medium to be filtered, which inlet opens into the filter chamber at a level that is traversed by the at least one filter cartridge; and

wherein when viewed in the transverse direction of the filter cartridge and at the level of the inlet, the shortest distance (X) from the filter cartridge to the side wall is, viewed in the transverse direction of the filter cartridge and below or above the level of the inlet, greater than the shortest distance (Y) from the filter cartridge to the side wall.