Support and drainage materials, filter including the materials, and methods of use are disclosed.

A robot purifier including: a purifying part which draws, purifies, and discharges air; and a driving part which is located at a lower end of the purifying part and is capable of autonomous driving, wherein the purifying part is capable of rotating 360 degrees horizontally, and the purifying part also is capable of rotating vertically such that an air intake direction and an air discharge direction in the vertical and horizontal directions is controllable.

A prefilter for a filter of a vacuum device 1 includes a frame extending in an axial direction between first and second axial extents. The frame includes a base located at the first axial extent, a first cylindrical ring extending axially from the base toward the second axial extent, a plurality of ribs extending from the first cylindrical ring towards the second axial extent and defining openings between the ribs, and a second cylindrical ring portion positioned at the second axial extent of the frame. The prefilter also includes a mesh layer comprising a plurality of mesh openings, the mesh layer coupled to the frame and configured to cover the openings to prevent debris larger than a size of the mesh openings from passing therethrough. The prefilter also includes an engagement feature coupled to the frame and configured to engage the filter to fasten the frame to the filter.

A toroidal trap for capturing stray particles directed inside the hole of the toroid shape and enabling gas to transit internally through and exit from a generally toroidal encasement. A filter is removably attached proximate to the hole and it receives the captured particles, the removability enabling the filter medium to be cleaned or replaced. At least one blower is situated within the encasement to drive air or gas past the filter medium and inside the encasement to exit exterior of the toroidal encasement. A method of using the aforementioned toroidal trap comprising the steps of activating the trap, directing particles at a target through the hole, depositing stray particles onto a filter medium and either repositioning the trap or the target depending on user preference.

According to the present disclosure, features, components and techniques useable for providing air cleaner arrangements are provided. Many of the features relate to an axial seal arrangement provided on a filter cartridge. A typical filter cartridge, for use with these features, is a filter cartridge having opposite flow ends. Example media arrangements that fit this characterization are described. Seal arrangements provided with an axial housing sealing engagement surface are shown. A seal arrangement is provided. Also, air cleaner assemblies having advantageous features therein are provided. Further, air cleaner housings are described, with selected, preferred features for engagement with filter cartridges.

A vent assembly has a vent housing having a first axial end, a second axial end, and an airflow pathway extending from the first end towards the second end. An environmental opening is towards the second axial end for fluid communication with an external environment. An enclosure opening is towards the first axial end for fluid communication with an interior of an enclosure. A perimetric support surface surrounds the airflow pathway. A support brace extends across the airflow pathway. The support brace has a lateral support surface offset in the axial direction from at least a portion of the perimetric support surface. Filter media is disposed laterally across the airflow pathway. The filter media has a perimeter region supported by the perimetric support surface around the airflow pathway and a central region supported by the lateral support surface such that the filter media is non-planar.

A wearable air purification system including: a support assembly, including: a first earpiece arranged to engage a first ear of a user, the first earpiece including an air filter; a second earpiece arranged to engage a second ear of the user; and a support member connecting the first earpiece to the second earpiece, the support member being arranged to be worn around the user's head; an air delivery mask connected to the support assembly, the air delivery mask being shaped to bound an air delivery region that contains the user's nose and/or mouth. In use, the air delivery mask includes an outlet in the air delivery region and an air channel configured to deliver a flow of air from the air filter to the outlet. Also, a motor is arranged to drive an impeller to pump air through the air channel to the air delivery region, the motor being housed in the first earpiece and being radially offset from a centre of the air filter.

An air conditioner with an air purifying function includes a housing having an air inlet and an air outlet thereon. An air conditioning assembly and an air purifying assembly are disposed in the housing. The air conditioning assembly includes an air conditioning flue. A first fan and a heat exchanger are disposed in the air conditioning flue. The air conditioning flue connects with the air inlet and the air outlet respectively. The air purifying assembly includes an air purifying flue. A second fan and an air filter screen are disposed in the air purifying flue. The air purifying flue connects with the air inlet and the air outlet respectively.

Systems and methods are described for a screen assembly for gas-air mixers in HVAC systems, such as for furnaces. A screen assembly can comprise a mesh screen, a housing, and a pressure tap. The mesh screen can allow for the intake of an air supply while also blocking unwanted foreign matter such as dust or leaves. The housing can receive the air supply and direct it into a gas-air mixer or other component. The pressure tap can be coupled to a gas valve or regulator in order to modulate the flow of gas when air flow is restricted.

A filter cartridge for a filter apparatus, including: a filter element that encloses an clean space within the filter element, at least partially; wherein the filter element has an outflow opening in flow communication with the clean space in the filter element; wherein the filter element has a longitudinal axis extending through the filter element and through the outflow opening; wherein a hollow base for connecting to a housing-side fastening element is arranged on or in the clean space; wherein an interior of the hollow base is sealed off from the clean space in a flow-tight manner.