A laundry appliance includes a cabinet that defines an interior volume with a laundry basket rotatably mounted therein. The laundry basket defines a chamber for the receipt of articles for treatment. The laundry appliance also includes a heating system in thermal communication with the chamber whereby heated air flows from the heating system to the chamber. An air filter is positioned between the laundry basket and the heating system upstream of the heating system, whereby a flow of return air from the chamber passes through and is filtered by the air filter before flowing to the heating system. The laundry appliance also includes a brush in contact with the air filter along one edge of the air filter and a motor operatively connected to the air filter. The motor is configured to rotate the air filter past and across the brush to thereby clean the air filter.

A laundry appliance includes a cabinet that defines an interior volume with a laundry basket rotatably mounted therein. The laundry basket defines a chamber for the receipt of articles for treatment. The laundry appliance also includes a heating system in thermal communication with the chamber whereby heated air flows from the heating system to the chamber. An air filter is positioned between the laundry basket and the heating system upstream of the heating system, whereby a flow of return air from the chamber passes through and is filtered by the air filter before flowing to the heating system. The laundry appliance also includes a brush in contact with the air filter along one edge of the air filter and a motor operatively connected to the air filter. The motor is configured to rotate the air filter past and across the brush to thereby clean the air filter.

The present invention relates to a surface treating appliance comprising, a regenerative filter having at least one filter, the regenerative filter being removably mounted to the surface treating appliance, the at least one filter being movable from a filtration zone to a regeneration zone, the filtration zone being spaced from the regeneration zone, and a control mechanism for moving the at least one filter between the regeneration zone and the filtration zone in response to the regenerative filter being removed from or mounted onto the surface treating appliance.

The present invention relates to a surface treating appliance comprising, a regenerative filter having at least one filter, the regenerative filter being removably mounted to the surface treating appliance, the at least one filter being movable from a filtration zone to a regeneration zone, the filtration zone being spaced from the regeneration zone, and a control mechanism for moving the at least one filter between the regeneration zone and the filtration zone in response to the regenerative filter being removed from or mounted onto the surface treating appliance.

A regenerative filter having a length of filter material, first and second perforated filter supports, a filter regenerator, and an intermediate duct, a first end of the filter material being wound around the first perforated filter support to form a first scroll type filter through which air to be filtered can pass, a second end of the filter material being wound around the second perforated filter support to form a second scroll type filter through which air to be filtered can pass, the filter material is movable in both directions between the first and second perforated filter supports by passing a single layer of filter material through the filter regenerator as it moves between them, the intermediate duct being arranged to take airflow which has passed through the first scroll type filter to the second scroll type filter for filtration during use of the regenerative filter.

The present invention relates to a regenerative filter comprising, a length of material having a first support tail and a filter portion, a first end of the material being wound around a first perforated support to form a first scroll type filter through which air to be filtered can pass, and a second end of the material being fixed to a filter support, the regenerative filter being arranged such that the material is movable in both directions between the first perforated support and the filter support, passing through a filter regenerator generator as it moves between them, the first end of the material forms the first support tail which extends from the first perforated support to at least the filter regenerator when the material is unwound from the first perforated support, the first support tail having a more open structure than the structure of the filter portion.

An air filtration equipment, the air filtration equipment is installed in an ventilation area at an interface between indoor and outdoor spaces of a fixed space, the equipment including: a sensor configured to sense information on inhalable particles in outside air; at least one filtering layer configured to filter out inhalable particles in air entering from the ventilation area into the indoor space; and a control device connected with the sensor and the at least one filtering layer and configured to control the at least one filtering layer to expand according to the information sensed by the sensor, such that the expanded at least one filtering layer covers the ventilation area. Also, a screen window and a window are provided.

An air filtration equipment, the air filtration equipment is installed in an ventilation area at an interface between indoor and outdoor spaces of a fixed space, the equipment including: a sensor configured to sense information on inhalable particles in outside air; at least one filtering layer configured to filter out inhalable particles in air entering from the ventilation area into the indoor space; and a control device connected with the sensor and the at least one filtering layer and configured to control the at least one filtering layer to expand according to the information sensed by the sensor, such that the expanded at least one filtering layer covers the ventilation area. Also, a screen window and a window are provided.

An air filter system in accordance with the present invention includes a filter housing that defines an airflow channel. A supply roll of a filter medium, and a take-up roll for receiving the filter medium from the supply roll are positioned parallel to each other in the airflow channel. A plurality of wire mesh diverter-screens are positioned between the supply roll and the take-up roll to establish a tortuous path for statically positioning the filter medium across the airflow channel. Periodically, the take-up roll can be rotated to draw replacement filter medium into position on the tortuous path.

A control unit is provided for monitoring the efficacy of an air filter in the ducting of an operating HVAC system. Specifically, the control unit monitors airflow velocity in the ducting to evaluate and control the power requirements that are necessary for the HVAC system to maintain a constant airflow velocity in the ducting of the system. In accordance with the present invention, the power requirements are measured and evaluated during the duty cycle of an air filter, to thereby determine when the air filter needs to be removed or replaced.