Air filter operable for filtering cabin air in vehicles, agricultural machinery, construction equipment and other work machines

Patent metadata

Field	Value
Publication number	US-9669343-B2
Application number	US-201615062641-A
Country	US
Kind code	B2
Filing date	Mar 7, 2016
Priority date	Jul 11, 2012
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

The invention relates to an air filter element of a passenger compartment for the driver's cab of agricultural and work machines, in particular with spraying and atomizing devices for pesticides and fertilizers, having an adsorption filter layer with activated carbon, a fine filter layer in particular for separating aerosols and a circumferential sealing for separating the raw side from the clean side during installation into a filter housing.

First claim

What is claimed is:

1. A passenger compartment air filter element for filtering an air flow in a driver's cab of agricultural and work machines, comprising:
an adsorption filter layer including:
a plurality of individual adsorption layers, each having:
a carrier stratum layer of a flat layer of filter medium or synthetic grid; and
a bulk layer of activated carbon particles arranged on one side of the carrier stratum layer, the bulk layer of activated carbon particles layered onto the carrier stratum layer and fixed to the carrier stratum layer by an adhesive;

wherein the plurality of individual adsorption layers are layered directly upon immediately adjacent individual absorption layers, onto either the carrier stratum layer or the bulk layer of active carbon of the immediately adjacent individual absorption layers, to form the adsorption filter layer;

a circumferential sealing element operable for sealably separating a raw side from a clean side of a filter housing when installed into the filter housing;
an inflow-sided prefilter layer having a porosity configured to separate dust from the airflow;
a fine filter layer configured for separating aerosols from the air flow, the fine filter layer arranged downstream of the adsorption filter layer at an outflow side of the adsorption filter layer;
wherein at least one of the following layers is embodied as a separate partial filter element: the prefilter layer, the plurality of individual adsorption filter layers and/or the fine filter layer.

2. The passenger compartment air filter element according to claim 1 , wherein
the fine filter layer is a zigzag-folded filter medium of glass fiber fleece;
wherein the fine filter layer includes at least one cover strata made of a spunbonded fleece.

3. A passenger compartment air filter element for filtering an air flow in a driver's cab of agricultural and work machines, comprising:
an adsorption filter layer including:
a plurality of individual adsorption layers, each having:
a carrier stratum layer of a flat layer of filter medium or synthetic grid; and
a bulk layer of activated carbon particles arranged on one side of the carrier stratum layer, the bulk layer of activated carbon particles layered onto the carrier stratum layer and fixed to the carrier stratum layer by an adhesive;

wherein the plurality of individual adsorption layers are layered directly upon immediately adjacent individual absorption layers, onto either the carrier stratum layer or the bulk layer of active carbon of the immediately adjacent individual absorption layers, to form the adsorption filter layer;

a circumferential sealing element operable for sealably separating a raw side from a clean side of a filter housing when installed into the filter housing;
an inflow-sided prefilter layer having a porosity configured to separate dust from the airflow;
wherein the inflow-sided prefilter layer is an unfolded or zigzag-folded filter medium made of cellulose, synthetic foam or synthetic fleece;
wherein the prefilter filter layer comprises two layers, in combination:
a spunbond fleece layer of polyamide (PA), polyester (PES) or polypropylene (PP); and
a meltblown fleece layer of polyamide (PA), polyester (PES) or polypropylene (PP).

4. The passenger compartment air filter element according to claim 3 , wherein
at least one of the following layers is embodied as a separate partial filter element: the prefilter layer, the plurality of individual adsorption filter layers and/or a fine filter layer configured to separating aerosols from the air flow and arranged downstream of the adsorption filter layer at an outflow side of the adsorption filter layer.

5. The passenger compartment air filter element according to claim 4 , comprising:
a frame or a lateral strip arranged directly on and fixed onto one or more lateral sides of the air filter element;
wherein the circumferential sealing element is arranged on the frame or on the lateral strip;
a plurality of the separate partial filter elements, each according to claim 4 ;
wherein the plurality of separate partial filter elements forming the passenger compartment filter element are stacked adjacently one above the other and sealingly connected and secured together by the frame or the lateral strip surrounding and joining common narrow sides of the plurality of separate partial filter elements;
wherein the frame or the lateral strip is injection molded onto, or welded to or glued onto the narrow sides of the plurality of separate partial filter elements.

6. The passenger compartment air filter element according to claim 5 , wherein
the sealing element includes a circumferential sealing profile comprising any of: a foamed, closed-pore polymer or a closed-pore polyurethane foam.

7. The passenger compartment air filter element according to claim 5 , wherein
the plurality of individual adsorption filter layers are joined together by a first sealingly circumferential lateral strip secured to the plurality of individual adsorption filter layers and circumferentially surrounding and joining together the plurality of individual adsorption filter layers forming a first partial filter element;
wherein the prefilter layer includes a second sealingly circumferential lateral strip secured to the prefilter layer and circumferentially surrounding the prefilter layer forming the second partial filter element;
wherein the fine filter layer includes a third sealingly circumferential lateral strip secured to the fine filter layer and circumferentially surrounding the fine filter layer forming the second partial filter element;
wherein an additional circumferential lateral strip or plastic frame is overlaid directly onto and secured to the first, second and third circumferential lateral strips, joining together the first, second and third partial filter elements to form a complete filter element;
wherein the circumferential sealing element is arranged on the additional circumferential lateral strip or plastic frame.

8. The passenger compartment air filter element according to claim 1 , wherein
the fine filter layer is a zigzag-folded filter medium of glass fiber fleece;
wherein the fine filter layer includes at least one cover strata made of a spunbonded fleece.

9. The passenger compartment air filter element according to claim 5 , wherein
the plurality of individual adsorption filter layers are joined together by a first sealingly circumferential lateral strip secured to the plurality of individual adsorption filter layers and circumferentially surrounding and joining together the plurality of individual adsorption filter layers forming a first partial filter element;
wherein the prefilter layer includes a second sealingly circumferential lateral strip secured to the prefilter layer and circumferentially surrounding the prefilter layer;
wherein an additional circumferential lateral strip or plastic frame is overlaid directly onto and secured to the first and second circumferential lateral strips, joining together the first and second partial filter elements to form a complete filter element;
wherein the circumferential sealing element is arranged on the additional circumferential lateral strip or plastic frame.

10. The passenger compartment air filter element according to claim 5 , wherein
the prefilter layer is a zigzag folded filter medium forming the first partial filter element;
wherein the plurality of individual adsorption layers are each flat, unpleated layers;
wherein plurality of individual adsorption layers are stacked directly onto and against each other forming a flat multilayer adsorption filter as a second partial filter element of the passenger compartment air

Assignees

• Mann & Hummel Gmbh

Inventors

• Stinzendoerfer Joachim
• Gohle Angelika
• Handstein Michael

Classifications

• B01D46/521

  using folded, pleated material · CPC title

• B60H3/0658

  Filter elements specially adapted for their arrangement in vehicles (B60H3/0608 takes precedence) · CPC title

• B01D46/0036 Primary

  by adsorption or absorption · CPC title

• B01D2259/4566

  for use in transportation means · CPC title

• B60H2003/0691

  Adsorption filters, e.g. activated carbon · CPC title