An air filter device and an operating method thereof. The air filter device comprises an air filter system and a powder distribution system. The air filter system comprises an air filter chamber (1), a clean air chamber (2), and a high-pressure jet pulse powder cleaning device (3). An entrance of the air filter chamber (1) is in communication with an air inlet pipe (4); an exit of the clean air chamber (2) is in communication with an air outlet pipe (6), and the air outlet pipe (6) is in communication with an exhaust fan (9). A plurality of bag filters or filter cartridges (10) are disposed in the air filter chamber (1). An opening end of each of the bag filters or filter cartridges (10) is in communication with the clean air chamber (2), and high-pressure jet pulse powder cleaning devices (3) are disposed above the opening end of the corresponding bag filters or filter cartridges (10). The powder distribution system includes a powder storage tank (13), which is in communication, via a powder delivery tube (15), with the air inlet pipe (4) of the air filter chamber (1). The operating method comprises a first powder distribution step and a second powder distribution step, which are respectively performed according to pressure detection status of the air filter chamber (1).

A smoke evacuating fryer, comprising a fryer body, an exhaust vent, a lid engaged on the fryer body, and a frying basket and a smoke evacuating and filtering apparatus provided within the fryer body An air intake gap is provided at a location where the lid and the fryer body are joined. The smoke evacuating and filtering apparatus is provided on the fryer body (1) and abuts against the frying basket. Air introduced into the air intake gap is passed over the frying basket, filtered by the smoke evacuating and filtering apparatus and then discharged via the exhaust vent.

Embodiments of the present application relate to the field of air purification devices, and disclose an air purification system and an Internet of things artificial intelligence control device, applied to both sides of an outdoor street and an associated space, comprising: a housing, an electrostatic dust removal air purifier, a controller, and a fan; The electrostatic dust removal air purifier, the controller and the fan are all disposed in the said housing; The front side of the housing is configured with an air inlet and an air outlet, herein the air inlet is for transmitting outdoor polluted air, and the air outlet is for transmitting purified air; The electrostatic dust removal air purifier and the fan are both connected to the said controller; The controller controls the fan to transmit outdoor air to the housing through the air inlet, and controls the electrostatic dust removal air purifier to purify the said outdoor air, after the air purification is completed, the purified air is discharged by the fan through the air outlet, so that the purification of the outdoor air is realized, to solve the technical problem due to the poor air circulation of the street canyons, the difficulty in diffusing pollutants, and the inability to reduce the pollution on both sides of the street.

Heat exchangers extract heat from an air stream and deliver the heat to another airstream. The heat exchangers are modified with a filtration system to allow the heat exchanger to effectively run within the poultry house environment. The poultry house is retrofitted with at least four flat-plate cross-flow heat exchangers. The heat exchangers operate to meet at least the minimum ventilation rates for the young birds. As birds grow, heat exchangers operate in conjunction with building exhaust fans for ventilation needs. Multiple heat exchangers are located throughout the house to provide appropriate ventilation.

There are disclosed a novel air cleaner of which the air-cleaning ability per unit volume is improved as compared to conventional air cleaners, and which operates with less power consumption in the case where the novel air cleaner has the same level of performance as a conventional air cleaner; and a humidifier and a deodorizing machine which include the same. The air cleaner includes a disc; a motor for rotating the disc; a filter A which is cylindrical as a whole, which is provided on the disc, and which surrounds an inner-side region including a rotational center of the disc, the filter A being bent into wave-shape such that irregularities of the wave are formed in radial direction of the disc; and at least one type of air resistor which is provided on the disc and provided on either an inner side or an outer side, or both inner and outer sides of the filter A.

An air purifying unit in which leakage of air flowing between a filter and a blowing fan is significantly reduced, and an air cleaning/ventilation device including the same, are provided. In addition, there are an air cleaning/ventilation device detachably installed in a window, used as a ventilation device, and used as an indoor air cleaning device.

It is advisable to remove harmful pathogens by filtering the air in a space using a set of filters over intakes. As the air travels through ductwork for that purpose the filters remove harmful pathogens. Harmful pathogens may include viruses or bacteria to name a few. Other pathogens may also be removed depending on the filtration media. This device is designed to be portable and caster wheels that can be locked have been placed on the air handler of the device.

The aroma-dispensing HVAC filter is a scented air filter capable of diffusing a pleasant odor throughout a building. The filter media is enclosed in an easily-opened, protective holder.

A filter unit for use in a filter box assembly, the filter unit comprising a particulate filter layer and a gas filter layer, the particulate filter layer being configured to bias towards the gas filter layer, exerting pressure thereon. There is also described filter box assemblies (including a duel filter assembly) comprising the filter unit, and a respiratory protective device comprising the filter unit. Also described is a method of manufacturing a filter unit with a gas filter layer and a particulate filter layer, wherein a force is applied to the particulate filter layer causing it to fix the gas filter layer in place. Also described is a method of manufacturing a dual filter assembly wherein a casing is twice reversibly attached to and detached from a support surface, filter units being added to the casing when the casing is attached to the surface.

The present invention relates to a backing net for a media pack. The backing net comprises a plurality of longitudinal beams and at least one vane and the longitudinal beam has first and second ends and is arranged to be mounted to the media pack in the longitudinal direction. The vane is attached to longitudinal beams and arranged to extend in the lateral direction of the media pack and adapted to direct an air flow passing through the backing net in a preferred direction. The invention further relates to a media pack with a backing net and a V-type filter having a plurality of media packs.