Filter device and method of cleaning-off a filter element of a filter device

A filter device comprising:

• at least one filter element adapted to filter a raw fluid and having a raw fluid side and a clean fluid side, said at least one filter element having a clean fluid outlet arranged on said clean fluid side and extending in a first plane, through which clean fluid is conducted out of said at least one filter element;
• at least one clean fluid collecting channel into which the clean fluid outlet opens;
• and
• at least one compressed-air cleaning-off device adapted to generate a pressure pulse for cleaning-off foreign matter adhering to the at least one filter element and to conduct the same through the clean fluid outlet to the at least one filter element,
• wherein the compressed-air cleaning-off device is adapted to conduct the pressure pulse at least approximately along the first plane to the clean fluid outlet,
• wherein the compressed-air cleaning-off device comprises a compressed-air supply channel operationally coupled to a clean fluid collecting channel outlet and adapted to charge the clean fluid collecting channel with pressure pulses;
• and
• two or more filter elements, wherein the filter elements are arranged following each other with respect to the direction of flow of the clean fluid flowing away from the filter element downstream of the clean fluid outlet, wherein the two or more filter elements are arranged one after the other along the clean fluid collecting channel.

A filter device comprising:

• at least one filter element adapted to filter a raw fluid and having a raw fluid side and a clean fluid side, said at least one filter element having a clean fluid outlet arranged on said clean fluid side and extending in a first plane, through which clean fluid is conducted out of said at least one filter element;
• at least one clean fluid collecting channel into which the clean fluid outlet opens;
• and
• at least one compressed-air cleaning-off device adapted to generate a pressure pulse for cleaning-off foreign matter adhering to the at least one filter element and to conduct the same through the clean fluid outlet to the at least one filter element,
• wherein the compressed-air cleaning-off device is adapted to conduct the pressure pulse at least approximately along the first plane to the clean fluid outlet,
• wherein the compressed-air cleaning-off device comprises a compressed-air supply channel operationally coupled to a clean fluid collecting channel outlet and adapted to charge the clean fluid collecting channel with pressure pulses;
• and
• at least two clean fluid collecting channels, each having at least one filter element associated with the clean fluid collecting channel, wherein the at least two clean fluid collecting channels open into a common clean fluid plenum, wherein a corresponding compressed-air supply channel of the compressed-air cleaning-off device is associated with each of the at least two clean fluid collecting channels.