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EP-4741036-A1 - A FILTER CARTRIDGE AND AN AIR TREATMENT MACHINE

EP4741036A1EP 4741036 A1EP4741036 A1EP 4741036A1EP-4741036-A1

Abstract

The disclosure relates to a pulse filter cartridge (10) for an air treatment machine (100), the filter cartridge (10) being configured to surround a body (110) of the air treatment machine (100), the filter cartridge (10) comprising: a filter media (20) surrounding an inner space (22); and a first end pan (40) arranged at a first end (10') of the filter cartridge (10); wherein the first end pan (40) comprises a guiding section (50) on the inner side (41), the guiding section (50) being configured to be arranged in abutment with a correspondingly shaped end section (120) of the body (110), and the first end pan (40) further comprises a fastening section (60) on the outer side (42) for interaction with a fastening arrangement (140) of the air treatment machine (100), the fastening section (60) being shaped so as to, when mating with the fastening arrangement (140), position the filter cartridge (10) in a predetermined rotational orientation on the body (110).

Inventors

  • Haist, Ralf
  • HERTLE, Waldemar
  • PERSSON, ULF
  • PAPACCIO, Mailin

Assignees

  • Camfil Aktiebolag

Dates

Publication Date
20260513
Application Date
20251028

Claims (15)

  1. A pulse filter cartridge (10) for an air treatment machine (100), the filter cartridge (10) being configured to surround a body (110) of the air treatment machine (100), the filter cartridge (10) comprising: - a filter media (20) surrounding an inner space (22); and - a first end pan (40) arranged at a first end (10') of the filter cartridge (10), an inner side (41) of the first end pan (40) being configured to face the body (110) and an outer side (42) of the first end pan (40) being configured to interact with a fastening arrangement (140) of the air treatment machine (100); wherein the first end pan (40) of the filter cartridge (10) comprises a guiding section (50) on the inner side (41), the guiding section (50) being configured to be arranged in abutment with a correspondingly shaped end section (120) of the body (110), thereby ensuring a centralized position of the filter cartridge (10) on the body (110), and wherein the first end pan (40) further comprises a fastening section (60) on the outer side (42) for interaction with the fastening arrangement (140) of the air treatment machine (100), the fastening section (60) being shaped so as to, when mating with the fastening arrangement (140), position the filter cartridge (10) in a predetermined rotational orientation on the body (110).
  2. The pulse filter cartridge (10) according to claim 1, wherein the first end pan (40) is completely closed.
  3. The pulse filter cartridge (10) according to claim 1 or 2, wherein the guiding section (50) and the fastening section (60) are integrally formed in the first end pan (40).
  4. The pulse filter cartridge (10) according to any one of the preceding claims, wherein the fastening section (60) is a protrusion extending from the outer side (42) of the first end pan (40) and the guiding section (50) is a recess formed on an inner side of the protrusion.
  5. The pulse filter cartridge (10) according to any one of claims 1-3, wherein the fastening section (60) is a recess formed on the outer side (42) of the first end pan (40) and the guiding section (50) is a protrusion extending from the inner side (41) of the first end pan (40).
  6. The pulse filter cartridge (10) according to any one of the preceding claims, wherein the peripheral shape of the fastening section (60) has a discrete rotational symmetry.
  7. The pulse filter cartridge (10) according to any one of the preceding claims, wherein the peripheral shape of the guiding section (50) has a discrete rotational symmetry.
  8. The pulse filter cartridge (10) according to any one of the preceding claims, wherein the first end pan (40) is manufactured by press forming, hydroforming, molding, roll forming or additive manufacturing.
  9. An air treatment machine (100) for air pollution control, the air treatment machine (100) comprising: - a pulse filter cartridge (10) according to any one of the preceding claims; - a body (110) configured to be surrounded by the filter cartridge (10); and - a fastening arrangement (140) for attaching the filter cartridge (10) to the air treatment machine (100), wherein the body (110) comprises an end section (120) having a shape corresponding to the shape of the guiding section (50) of the filter cartridge (10), the filter cartridge (10) being arranged with the guiding section (50) in abutment with the end section (120) of the body (110) to thereby ensure a centralized position of the filter cartridge (10) on the body (110), and wherein the fastening arrangement (140) is mating with the fastening section (60) of the filter cartridge (10) to position the filter cartridge (10) in a predetermined rotational orientation on the body (110).
  10. The air treatment machine (100) according to claim 9, wherein the fastening arrangement (140) comprises: - an attachment part (142) configured to engage with the fastening section (60) of the first end pan (40) of the filter cartridge (10); and - a clamping element (144) connected to the air treatment machine (100) and pivotally arranged in relation to the attachment part (142), wherein the clamping element (144) is configured to, in a closed position, press the attachment part (142) against the first end pan (40) of the filter cartridge (10) and thereby attach the filter cartridge (10) to the air treatment machine (100).
  11. The air treatment machine (100) according to claim 10, wherein the attachment part (142) has a shape corresponding to the peripheral shape of the fastening section (60) of the filter cartridge (10).
  12. The air treatment machine (100) according to claim 10 or 11, wherein the attachment part (142) encircles the fastening section (60) of the filter cartridge (10).
  13. The air treatment machine (100) according to any one of claims 10-12, wherein the fastening arrangement (140) further comprises: - a pivot shaft (146) connected to the air treatment machine (100), wherein the attachment part (142) and the clamping element (144) are pivotally connected to the pivot shaft (146).
  14. The air treatment machine (100) according to any one of claims 10-13, wherein the shape of the attachment part (142) has a discrete rotational symmetry.
  15. The air treatment machine (100) according to any one of claims 10-14, wherein the body (110) is compartmentalized.

Description

Technical field The present disclosure relates to a filter cartridge for an air treatment machine and an air treatment machine for air pollution control. More specifically, the disclosure relates to a pulse filter cartridge for an air treatment machine and an air treatment machine for air pollution control as defined in the introductory parts of the independent claims. Background art Air treatment machines for air pollution control, such as dust, mist and fume collectors, may comprise one or more filter cartridges to clean the air. Such machines may be used for example in industrial environments relating to metal processing, pharmaceutical processing, mining, food processing, chemical processing and other industries. Different types of filter cartridges may be used and one common type is the so-called pulse filter. A pulse filter, also called self-cleaning filter, comprises a filter media surrounding an inner volume. The particulate matter accumulate on an external surface of the filter media and pulses of compressed air is provided at regular intervals to the inner volume. The compressed air pulses will dislodge the accumulated particulate matter from the filter media surface and the particulate matter will fall into a collection hopper by gravity. This way, the pulse filter can be used for a longer time with minimal downtime due to service and maintenance or change of filter. Pulse filter cartridges used in air treatment machines are today typically attached to the machine by means of nuts and washers on a threaded axle extending through a center hole of and end pan of the filter cartridge. A problem with the prior art solution is that it is complicated and cumbersome to mount and dismount the filter cartridges since it requires separate tools and comprises multiple separate parts. Furthermore, the fastening arrangement including the threaded axle and the center hole in the end pan may cause leakages and thus quality issues. There is therefore a need for an improved way of attaching pulse filter cartridges in air treatment machines. Summary It is an object of the present disclosure to mitigate, alleviate or eliminate one or more of the above-identified deficiencies and disadvantages in the prior art and solve at least the above-mentioned problem. An object of the present disclosure is to achieve a pulse filter cartridge which is easier to mount and dismount in an air treatment machine. A further object of the present disclosure is to achieve a pulse filter cartridge which is less prone to leakage and thereby has an improved performance. According to a first aspect there is provided a pulse filter cartridge for an air treatment machine, the filter cartridge being configured to surround a body of the air treatment machine, the filter cartridge comprising: a filter media surrounding an inner space; a first end pan arranged at a first end of the filter cartridge, an inner side of the first end pan being configured to face the body and an outer side of the first end pan being configured to interact with a fastening arrangement of the air treatment machine; wherein the first end pan of the filter cartridge comprises a guiding section on the inner side, the guiding section being configured to be arranged in abutment with a correspondingly shaped end section of the body, thereby ensuring a centralized position of the filter cartridge on the body, and wherein the first end pan further comprises a fastening section on the outer side for interaction with the fastening arrangement of the air treatment machine, the fastening section being shaped so as to, when mating with the fastening arrangement, position the filter cartridge in a predetermined rotational orientation on the body. The pulse filter cartridge comprises a first end and a second end. The first end pan is arranged at the first end and an annular second end pan is typically arranged at the second end. The second end is thus at least partly open. The pulse filter cartridge will hereinafter be referred to as the filter cartridge but it is to be understood that it is a pulse filter cartridge. The filter cartridge is thus configured to allow the particulate matter to accumulate on an external surface of the filter media and it is configured to get pulses of compressed air provided at regular intervals to the inner space. The filter cartridge is thus configured to be arranged in the air treatment machine such that contaminated air to be treated flows from the exterior of the filter media into the inner space and out through the opening at the second end of the filter cartridge. When particulate matter from the contaminated air has been accumulated on the exterior of the filter media, a pulse of compressed air will be provided inside the inner space and the particulate matter will thereby loosen from the exterior of the filter media and can be collected below the filter cartridge. The filter cartridge comprising a first end pan with a guiding section and a faste