Filter cartridge with venturi nozzle

Patent metadata

Field	Value
Publication number	US-11235271-B2
Application number	US-202016736853-A
Country	US
Kind code	B2
Filing date	Jan 8, 2020
Priority date	Jan 10, 2019
Publication date	Feb 1, 2022
Grant date	Feb 1, 2022

Abstract

A filter cartridge for cleaning an air flow includes a base, a cover provided with a central recess, and at least one pleated filter element arranged between the cover and the base. The at least one filter element encloses an interior space. The cover has a venturi nozzle, and the venturi nozzle engages in the pleated filter element. The venturi nozzle is spread out in comb-like fashion in the region of its end engaging in the filter element.

First claim

What is claimed is:

1. A filter cartridge for cleaning an air flow, the filter cartridge comprising:
a base,
a cover provided with a central recess, and
at least one pleated filter element arranged between the cover and the base, wherein the at least one filter element encloses an interior space,
wherein the cover has a venturi nozzle, the venturi nozzle engages in the pleated filter element, and the venturi nozzle is spread out in comb-like fashion in the region of its end engaging in the filter element.

2. The filter cartridge according to claim 1 , wherein the venturi nozzle has a plurality of radial lamellae in the region of its end engaging in the filter element, wherein a respective radial lamella engages between two pleats of the pleated filter element.

3. The filter cartridge according to claim 1 , wherein the venturi nozzle has a choke point, such that the choke diameter is smaller than an inflow-side diameter and an outflow-side diameter of the venturi nozzle.

4. The filter cartridge according to claim 3 , wherein the inflow-side and outflow-side diameters are the same size.

5. The filter cartridge according to claim 3 , wherein the choke diameter corresponds approximately to the inner diameter of the internal space in the filter element.

6. The filter cartridge according to claim 1 , wherein the venturi nozzle has a narrowing inlet profile in the region of its end engaging in the filter element, and a widening outlet profile in the region outside the filter element.

7. The filter cartridge according to claim 1 , wherein the venturi nozzle is designed in accordance with DIN EN ISO 5167.

8. The filter cartridge according to claim 1 , wherein the filter element is brought into a cylindrical or frustum shape and has an oval, substantially round, or circular footprint in section.

9. The filter cartridge claim 1 , wherein the filter element is sealed off from the cover by an encapsulation material.

10. A filter cartridge for cleaning an air flow, the filter cartridge comprising:
a base,
a cover provided with a central recess, and
at least one pleated filter element arranged between the cover and the base, wherein the at least one filter element encloses an interior space,
wherein the cover has a venturi nozzle, the venturi nozzle engages in the pleated filter element, and the venturi nozzle has a choke point, such that the choke diameter is smaller than an inflow-side diameter and an outflow-side diameter of the venturi nozzle.

11. The filter cartridge according to claim 10 , wherein the inflow-side and outflow-side diameters are the same size.

12. The filter cartridge according to claim 10 , wherein the choke diameter corresponds approximately to the inner diameter of the internal space in the filter element.

13. The filter cartridge according to claim 10 , wherein the venturi nozzle has a narrowing inlet profile in the region of its end engaging in the filter element, and a widening outlet profile in the region outside the filter element.

14. The filter cartridge according to claim 10 , wherein the venturi nozzle is designed in accordance with DIN EN ISO 5167.

15. The filter cartridge according to claim 10 , wherein the filter element is brought into a cylindrical or frustum shape and has an oval, substantially round, or circular footprint in section.

16. The filter cartridge claim 10 , wherein the filter element is sealed off from the cover by an encapsulation material.

17. The filter cartridge according to claim 10 , wherein the venturi nozzle has a plurality of radial lamellae in the region of its end engaging in the filter element, wherein a respective radial lamella engages between two pleats of the pleated filter element.

Assignees

• Freudenberg Carl Kg

Inventors

• Kluck Stefan
• Schulz Karsten
• Schumacher Sascha

Classifications

• B01D46/521 Primary

  using folded, pleated material · CPC title

• B01D46/4281

  Venturi's or systems showing a venturi effect · CPC title

• B01D46/0001

  Making filtering elements · CPC title

• B01D46/2414

  End caps including additional functions or special forms · CPC title

• B01D46/71 Primary

  with pressurised gas, e.g. pulsed air · CPC title