A filter may remove PM.sub.2.5 and/or other airborne pollutants, which filter has fibers of an average diameter of no more than 500 nm, the fibers of at least 90 wt. % polyacrylonitrile, relative to all fibers in the filter; and a catalyst of at least 90 wt. % TiO.sub.2, relative to all catalytic metals in the filter, dispersed onto the fibers. The fibers need not be charged. The TiO.sub.2 may be condensed or precipitated onto the fibers out of a liquid containing the TiO.sub.2 and the fibers by simple methods. The catalyst may be activated by UV irradiation to decompose particulate matter having an average particle size of 2.5 μm or less, i.e., PM.sub.2.5, and/or other airborne pollutants from air. Such filters may be implemented around areas of vehicle traffic, e.g., as elements of traffic lights, and may be used to controllably purify polluted air.

A filter may remove PM.sub.2.5 and/or other airborne pollutants, which filter has fibers of an average diameter of no more than 500 nm, the fibers of at least 90 wt. % polyacrylonitrile, relative to all fibers in the filter; and a catalyst of at least 90 wt. % TiO.sub.2, relative to all catalytic metals in the filter, dispersed onto the fibers. The fibers need not be charged. The TiO.sub.2 may be condensed or precipitated onto the fibers out of a liquid containing the TiO.sub.2 and the fibers by simple methods. The catalyst may be activated by UV irradiation to decompose particulate matter having an average particle size of 2.5 μm or less, i.e., PM.sub.2.5, and/or other airborne pollutants from air. Such filters may be implemented around areas of vehicle traffic, e.g., as elements of traffic lights, and may be used to controllably purify polluted air.

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.

An ambient air purification device has a filter device arranged in a filter receiving region of its housing. The filter device has a main filter element and a prefilter element, each having a circumferential frame device. A clamping force generating device is provided in the housing to exert an axial clamping force on the frame device of the main filter element resting, when mounted, at the frame device of the prefilter element. The clamping force is transmitted to the frame device of the prefilter element and presses the latter seal-tightly via a seal against a circumferential contact shoulder of the filter receiving region to seal the filter device in the filter receiving region. The frame device of the main filter element is sealed indirectly by the frame device of the prefilter element in relation to the housing and has no seal location of its own in relation to the housing.

An air purification system is provided which includes measurement of a concentration of a target pollutant within the air. A gas sensor is used for sensing a concentration of the pollutant (although it will detect other pollutants as well due to cross-sensitivity). A filter is provided which selectively removes the target pollutant while having a significantly smaller effect in reducing other pollutants to which the sensor is cross-sensitive. A gas sensor response is obtained before filtering, a gas sensor response after filtering, and the sensitivity characteristics of the gas sensor to the pollutant are processed, thereby to determine a gas concentration of the pollutant in the air before filtering. In this way, the concentration measurement is better than a direct measurement with the gas sensor as a result of a low selectivity of the gas sensor.

The object of the present invention is to reduce the exposure of polluted air to a baby, and in particular to minimize the pollutions inhaled by a baby when strolling, walking or transporting a baby in an exterior environment. The object is attained by providing a portable device for filtering air, said device being adapted to be arranged in association with a top end of a baby-transporting device. With such an air-filtering device, air from outside of the baby-transporting device may be filtered and purified before being provided in a well-distributed manner to the area of the baby-transporting device where a baby is positioned.

A filter may remove PM.sub.2.5 and/or other airborne pollutants, which filter has fibers of an average diameter of no more than 500 nm, the fibers of at least 90 wt. % polyacrylonitrile, relative to all fibers in the filter; and a catalyst of at least 90 wt. % TiO.sub.2, relative to all catalytic metals in the filter, dispersed onto the fibers. The fibers need not be charged. The TiO.sub.2 may be condensed or precipitated onto the fibers out of a liquid containing the TiO.sub.2 and the fibers by simple methods. The catalyst may be activated by UV irradiation to decompose particulate matter having an average particle size of 2.5 μm or less, i.e., PM.sub.2.5, and/or other airborne pollutants from air. Such filters may be implemented around areas of vehicle traffic, e.g., as elements of traffic lights, and may be used to controllably purify polluted air.

A vehicle including at least one filter for trapping particles in a vehicle's outside surrounding air. The filter includes a first part and a second part. The first part includes a first cilia layer. An air inlet is arranged in one end of the filter. The first cilia layer is arranged to trap at least some particles in the air flowing into the filter via the air inlet when the first cilia layer is electrostatically charged by an electromagnetic field. The filter is connected to a vehicle chassis and such that one of the first and second parts faces the vehicle chassis and the other part faces ground.

A vehicle including at least one filter for trapping particles in a vehicle's outside surrounding air. The filter includes a first part and a second part. The first part includes a first cilia layer. An air inlet is arranged in one end of the filter. The first cilia layer is arranged to trap at least some particles in the air flowing into the filter via the air inlet when the first cilia layer is electrostatically charged by an electromagnetic field. The filter is connected to a vehicle chassis and such that one of the first and second parts faces the vehicle chassis and the other part faces ground.

The present invention relates to an air shower gate and, more specifically, to an air shower gate installed at an indoor/outdoor entrance/exit so as to remove microdust, hazardous materials, and odor from people entering/exiting same, and configured to monitor the quality of indoor/outdoor air such that, through air purification or ventilation, a comfortable and clean indoor environment can be maintained and managed. An air shower gate according to the present invention has the following advantages: Dust and the like gathered on clothes during outdoor activities can be removed, and indoor and outdoor spaces are separated by an air curtain, thereby enabling the user to move in/out conveniently without having to open/close a door. Inflow of dust into the indoor space is prevented by the air curtain, and indoor air is filtered to perform an air purifying function.