Pulse jet air cleaner systems; evacuation valve arrangements; air cleaner components; and, methods

An air cleaner assembly comprising:

• (a) an air cleaner housing having an air flow inlet, an air flow outlet and an interior;
• (i) the housing including an outer sidewall;
• (b) a dust ejection port arrangement in outer sidewall of the housing;
• (i) the dust ejection port arrangement including a dust egress aperture arrangement in the outer sidewall oriented spaced radially from a lowermost portion of the housing sidewall, in use, by a radial arc of at least 30° around a central axis of the housing;
• and,
• (c) a dust receiver positioned exteriorly of the housing and oriented to receive dust from the dust egress aperture arrangement.

An air cleaner assembly comprising:

• (a) an air cleaner housing having an air flow inlet, an air flow outlet and an interior;
• (i) the housing including an outer sidewall;
• (b) a dust ejection port arrangement in the housing;
• (i) the dust ejection port arrangement including a dust egress aperture arrangement in the outer sidewall;
• (c) a dust receiver positioned exteriorly of the housing and oriented to receive dust from the dust egress aperture arrangement;
• (i) the dust receiver including first substantially tangential wall section and an opposite wall section.

An air filter cartridge comprising:

• (a) pleated media positioned in extension around a central filter interior in a configuration having radially outwardly directed pleat tips and radially inwardly directed pleat tips;
• (i) the radially outwardly directed pleat tips having a first protective polymeric coating thereon;
• and,
• (ii) the radially inwardly directed pleat tips being free of the first protective polymeric coating.

A method of operating a pulse jet air cleaner assembly to clean a filter cartridge positioned within a housing thereof;

• the method including steps of:
• (a) directing inlet flow of air to be filtered into a housing of the air cleaner assembly and into a cyclonic pattern around a filter cartridge therein;
• (b) filtering the air by passage of the air through the cartridge in direction from out-to-in and into an open filter interior;
• (c) selectively directing a pulse jet of air into the open filter interior of the filter cartridge and then through the filter cartridge from in-to-out;
• and,
• (d) directing dust in an interior of the housing through a dust egress arrangement positioned radially at least 30° above a lowermost portion of the housing.

A method of operating a pulse jet air cleaner assembly to clean a filter cartridge positioned within a housing thereof;

• the method including steps of:
• (a) directing inlet flow of air to be filtered into a housing of the air cleaner assembly and into a cyclonic pattern around a filter cartridge therein;
• (b) filtering the air by passage of the air through the cartridge in direction from out-to-in and into an open filter interior;
• (c) selectively directing a pulse jet of air into the open filter interior of the filter cartridge and then through the filter cartridge from in-to-out;
• and,
• (d) directing dust in an interior of the housing through a dust egress arrangement extending over a radial arc of at least 30° and into a dust receiver.

A method of operating a pulse jet air cleaner assembly including cleaning a filter cartridge positioned within a housing thereof;

• the method including steps of:
• (a) directing inlet flow of air to be filtered into a housing of the air cleaner assembly and into a cyclonic pattern around a filter cartridge therein;
• (b) filtering the air by passage of the air through the cartridge in direction from out-to-in and into an open filter interior;
• (c) selectively directing a pulse jet of air into the open filter interior of the filter cartridge and then through the filter cartridge from in-to-out;
• and,
• (d) directing dust in an interior of the housing through a dust egress arrangement and into a dust receiver having a first substantially tangentially extending sidewall section and a second, opposite, wall section.

A method of operating a pulse jet air cleaner assembly including a cartridge positioned within a housing thereof;

• the method including steps of:
• (a) directing inlet flow of air to be filtered into a housing of the air cleaner assembly;
• (b) filtering the air by passage through the filter cartridge in a filtering flow direction;
• and,
• (c) selectively directing cleaning pulse flow through the filter cartridge in a direction generally opposite the filtering flow direction;
• the step of directing cleaning pulse flow being in accord with a pulse control logic in which:
• (i) when a restriction condition Rc reaches a level of at least W, pulsing is conducted for a selected amount A2, when next Rc drops to Z2 or less, wherein Z2 <W;
• and,
• (ii) when a restriction condition Rc of at least W is not reached within a selected time period T, pulsing is conducted for a selected amount A1 when next Rc drops to Z1 or less;
• wherein A1<A2.

A method of operating a pulse jet air cleaner assembly including a cartridge positioned within a housing thereof;

• the method including a step of:
• (a) selectively directing cleaning pulse flow through the filter cartridge in a direction generally opposite to a filtering flow direction;
• the step of directing cleaning pulse flow being in accord with a pulse control logic including at least three (3) pulse event initiation and protocol types, including:
• (i) a base type wherein pulsing is initiated for a selected amount A1, if a restriction condition (Rc) does not reach a defined level W, within a selected time period T;
• (ii) at least one intermediate type, wherein pulsing is initiated for a selected amount A2 after the restriction condition (Rc) is observed to reach the defined level W, but only after the restriction condition (Rc) next reduces to no more than a selected level, which is less than W;
• and,
• (iii) a priority type, wherein pulsing is initiated for a selected amount A4 when the restriction condition (Rc) is observed to reach a level Y, without waiting for a reduced restriction condition (Rc) relative to Y, the next occur;
• wherein Y>W.

An air cleaner assembly comprising:

• (a) an air cleaner housing have an air flow inlet, an air flow outlet, and an interior;
• and, a dust ejection port arrangement;
• (b) a filter cartridge positioned in the housing interior;
• and,
• (c) a pulse jet arrangement configured to direct a cleaning pulse flow through the filter cartridge;
• in accord with a method including a step of:
• (i) selectively directing cleaning pulse flow through the filter cartridge in a direction generally opposite to a filtering flow direction;
• the step of directing cleaning pulse flow being in accord with a pulse control logic including at least three (3) pulse event initiation and protocol types, including:
• (A) a base type wherein pulsing is initiated for a selected amount A1, if a restriction condition (Rc) does not reach a defined level W, within a selected time period T;
• (B) at least one intermediate type, wherein pulsing is initiated for a selected amount A2 after the restriction condition (Rc) is observed to reach the defined level W, but only after the restriction condition (Rc) next reduces to no more than a selected level, which is less than W;
• and,
• (C) a priority type, wherein pulsing is initiated for a selected amount A4 when the restriction condition (Rc) is observed to reach a level Y, without waiting for a reduced restriction condition (Rc) relative to Y, the next occur;
• wherein Y>W.