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

Patent metadata

Field	Value
Publication number	US-9956515-B2
Application number	US-201715600870-A
Country	US
Kind code	B2
Filing date	May 22, 2017
Priority date	Jul 11, 2012
Publication date	May 1, 2018
Grant date	May 1, 2018

Abstract

The invention relates to an air filter element, particularly for 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. An air filter element for filtering an air flow, comprising:
an adsorption filter layer including:
a plurality of individual adsorption layers, comprising at least:
a first adsorption layer having:
a first carrier stratum layer as a flat layer of a first flat sheet of filter medium or synthetic grid; and
a bulk layer of activated carbon particles arranged on one side of the first carrier stratum layer, the bulk layer of activated carbon particles layered onto the first carrier stratum layer and fixed to the first carrier stratum layer by an adhesive;

a second adsorption layer stacked directly onto and against the first adsorption layer, the second adsorption layer having:
a second carrier stratum layer as a flat layer of a second flat sheet of filter medium or synthetic grid, the second flat sheet separate from the first flat sheet; and
a bulk layer of activated carbon particles arranged on one side of the second carrier stratum layer, the bulk layer of activated carbon particles layered onto the second carrier stratum layer and fixed to the second carrier stratum layer by an adhesive;

wherein the plurality of individual adsorption layers are stacked directly onto and against 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 a stacked plurality of separate individual adsorption layers, forming the adsorption filter layer of the air filter element;

a circumferential sealing element operable for sealably separating a raw side from a clean side of a filter housing when the air filter element is installed into the filter housing.

2. The air filter according to claim 1 , wherein
the circumferential sealing element is arranged on a frame or on a lateral strip arranged on and sealing the one or more lateral sides of the air filter element.

3. The air filter element according to claim 2 , wherein
the frame is made of a plastic material.

4. The air filter element according to claim 1 , wherein
between 4 and 20 of individual adsorption layers are arranged one above the other.

5. An air filter element for filtering an air flow, 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 the air filter element is installed into the filter housing;
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.

6. The 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.

7. The air filter element according to claim 1 , comprising
an inflow-sided prefilter layer having a porosity configured to separate dust from the airflow.

8. The air filter element according to claim 7 , wherein
the inflow-sided prefilter layer is an unfolded or zigzag-folded filter medium made of cellulose, synthetic foam or synthetic fleece.

9. An air filter element for filtering an air flow, 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 the air filter element is 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).

10. The air filter element according to claim 8 , 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.

11. The air filter element according to claim 10 , comprising
a plurality of the separate partial filter elements, each according to claim 10 ;
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 a frame or a 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.

12. The air filter element according to claim 11 , wherein
the sealing element includes a circumferential sealing profile comprising any of: a foamed, closed-pore polymer or a closed-pore polyurethane foam.

13. An air filter element for filtering an air flow, 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 the air filter element is 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 cellul

Assignees

• Mann & Hummel Gmbh

Inventors

• Stinzendoerfer Joachim
• Gohle Angelika
• Handstein Michael

Classifications

• B01D2275/10

  Multiple layers · CPC title

• B01D46/10

  Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces · CPC title

• B60H3/06

  Filtering · CPC title

• B60H3/0658

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

• B01D2259/4566

  for use in transportation means · CPC title