The present disclosure relates to a portable air purifier and the fan module provided therin. In the disclosed invention, the portable air purifier includes a fan module that is disposed between a discharge surface and a filter, and suctions air having passed through the filter, in an axial direction, and discharges the air in a direction between the axial direction and a radial direction.

The present application discloses an air purifier, including: a first body including a first housing; and a second body detachably connected to the first body and including a second housing, where buckles are arranged on the first housing, and snap-fit members are arranged on the second housing; the number of the buckles is greater than the number of the snap-fit members; and the first body in butt joint is enabled to rotate relative to the second body, so that the buckles can be hooked with the snap-fit members or separated from the snap-fit members. In the air purifier, a larger number of buckles are hooked with a smaller number of snap-fit members, so that disassembly and assembly operations can be simplified. Because the first body and the second body are detachable, the second body can be operated independently when the filter screen is detached.

The present application discloses an air purifier, including: a first body including a first housing; and a second body detachably connected to the first body and including a second housing, where buckles are arranged on the first housing, and snap-fit members are arranged on the second housing; the number of the buckles is greater than the number of the snap-fit members; and the first body in butt joint is enabled to rotate relative to the second body, so that the buckles can be hooked with the snap-fit members or separated from the snap-fit members. In the air purifier, a larger number of buckles are hooked with a smaller number of snap-fit members, so that disassembly and assembly operations can be simplified. Because the first body and the second body are detachable, the second body can be operated independently when the filter screen is detached.

A system for airflow control includes at least two apparatus. The apparatus configures to create the required airflow to direct, remove and deactivate pathogenic aerosols in the air by working together. The apparatus can equip with low power fan.

An air treatment device includes a casing with an air inlet and an air outlet. Air flows through the casing and an air treatment section in the casing. The air treatment section includes a fan for generating a flow of air from the air inlet to the air outlet, a filtering means arranged within the flow of air, a first pressure sensor to measure a first pressure in the flow of air, a second pressure sensor to measure a second pressure in a room or cabin surrounding the air treatment device, and a control unit. The control unit is configured to adapt a speed of the fan based on the measured first pressure and the measured second pressure to control a flow of air through the air treatment device.

An air treatment device includes a casing with an air inlet and an air outlet. Air flows through the casing and an air treatment section in the casing. The air treatment section includes a fan for generating a flow of air from the air inlet to the air outlet, a filtering means arranged within the flow of air, a first pressure sensor to measure a first pressure in the flow of air, a second pressure sensor to measure a second pressure in a room or cabin surrounding the air treatment device, and a control unit. The control unit is configured to adapt a speed of the fan based on the measured first pressure and the measured second pressure to control a flow of air through the air treatment device.

A humidification and air cleaning apparatus is provided that may include a water tank having a discharge port which is open toward an upper side, and a discharge grill disposed at the water tank and covering the discharge port. The discharge grill may have a plurality of vanes disposed at the discharge port and spaced apart from each other, and when viewed from a top, overlap each other to cover the discharge port. An edge of a vane may overlap an edge of an adjacent vane, thereby minimizing scattering of droplets to an indoor space while minimizing resistance of discharged air.

There is provided an air filter for use in a heating, ventilation, and air conditioning (HVAC) system, the air filter including: a front portion comprising a molded filtering material, the molded filtering material defining a plurality of pockets arranged over a front face of the front portion; and a rear portion joined to the front portion, the rear portion defining a plurality of holes therethrough. In another aspect, there is provided a method for determining performance of an air filter in a heating, ventilation, and air conditioning (HVAC) system, the method including: receiving a first temperature reading from a primary sensor measuring the temperature of return air in the HVAC system; receiving a second temperature reading from a secondary sensor measuring the temperature of supply air in the HVAC system; determining a temperature differential between the first temperature and the second temperature; outputting an indication of poor performance of the air filter where the temperature difference is greater than a predetermined value.

There is provided an air filter for use in a heating, ventilation, and air conditioning (HVAC) system, the air filter including: a front portion comprising a molded filtering material, the molded filtering material defining a plurality of pockets arranged over a front face of the front portion; and a rear portion joined to the front portion, the rear portion defining a plurality of holes therethrough. In another aspect, there is provided a method for determining performance of an air filter in a heating, ventilation, and air conditioning (HVAC) system, the method including: receiving a first temperature reading from a primary sensor measuring the temperature of return air in the HVAC system; receiving a second temperature reading from a secondary sensor measuring the temperature of supply air in the HVAC system; determining a temperature differential between the first temperature and the second temperature; outputting an indication of poor performance of the air filter where the temperature difference is greater than a predetermined value.

An air cleaner is provided that may include a main body having at least one cylindrical filter and at least one filter frame that forms a mounting space for the at least one filter, and a cylindrical case coupled to an outside of the main body, the cylindrical case having at least one suction inlet through which air is suctioned toward the at least one filter, so that air may be suctioned in 360-degree directions. If the cylindrical case is opened, the at least one filter may be extracted to the outside in a radial direction from the mounting space, thereby facilitating attachment/detachment of the at least one filter.