An apparatus and a method are provided for a heating, ventilation, and air conditioning (HVAC) home air filter to remove airborne molecular contaminants and volatile organic compounds (VOCs) from air within residential spaces. The HVAC home air filter comprises a supportive frame having a shape and size suitable to orient the HVAC home air filter within a residential HVAC system. A filter medium is retained within the supportive frame to remove the airborne molecular contaminants and VOCs from air flowing through the residential HVAC system. The filter medium comprises a combination of media layers configured to exhibit a relatively high filtration efficiency and a low air pressure drop across the filter medium. The supportive frame comprises a plurality of elongate sections and corner sections disposed along perimeter edges of the filter medium to support the filter medium within the residential HVAC system so as direct air through the filter medium.

A filter bondable to a grille is provided. The filter is fixable alone to the grille so as not to separate therefrom without using another element such as a hook and loop fastener. The filter is constituted by a filter body and ears integrally connected to the outer edge of the filter body. The filter is bondable to the grille by bringing the filer body into abutment with the front surface of the grille, and bending the ears relative to the filter body until the ears abut against the side surface of the grille. By forming the ears at the filter, and bringing the ears into abutment with the side surface of the grille so as to be bonded thereto, it is possible to increase the attachment strength of the filter relative to the grille, compared to conventional filters each constituted by only a filter body.

A filter is treated with a reduced amount of a halo active aromatic sulfanomide compound of Formula (I):

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wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, and R.sub.5 are independently selected from hydrogen, COOR′, CON(R″).sub.2, alkoxy, CN, NO.sub.2, SO.sub.3R″, halogen, substituted or unsubstituted phenyl, sulfonamide, halosulfonamide, and substituted or unsubstituted C.sub.1-C.sub.12 alkyl; R′ is hydrogen, an alkali metal, an alkaline earth metal, substituted C.sub.1-C.sub.12 alkyl, or unsubstituted C.sub.1-C.sub.12 alkyl; and R″ is hydrogen or substituted or unsubstituted C.sub.1-C.sub.12 alkyl, where the two R″ groups in CON(R″).sub.2 may be independently selected; X is halogen; M is an alkali or alkaline earth metal; and n is the number of water molecules per molecule of the sulfonamide compound. The compound effectively suppresses odors pre-use, in use, and post-use for extended periods of time.

An air conditioner is provided that includes a filter, a filter cleaning unit having a space formed therein to place foreign matter separated from the filter, a moving mechanism to make the filter cleaning unit move along the filter, the moving mechanism including a first gear having a closed loop section shape with gear teeth formed at at least one of an outside circumference or an inside circumference, a gear guide to guide the first gear to rotate while maintaining at least one linear portion, a second gear engaged with the first gear, a drive source to make the second gear rotate, a third gear engaged with the linear portion of the first gear, and a connection mechanism connected both to the third gear and the filter cleaning unit to make the filter cleaning unit move, thereby permitting to make the moving mechanism compact and enhancing reliability.

Disclosed herein is an air conditioner that determines the replacement time of a filter. The air conditioner may include a filter for filtering particles in air that is suctioned, a first camera disposed so as to monitor the state of the filter, and a controller for analyzing an image of the filter acquired from the first camera through a deep neural network model trained using machine learning in order to determine a pollution level of the filter. The controller may be configured to determine the time at which the filter is to be replaced based on at least the pollution level of the filter, and may be further configured to use information collected from other electronic devices in an Internet-of-Things environment connected as a 5G communication environment in order to determine the time at which the filter is to be replaced.

Contaminants present in air ducts or other components of HVAC systems may be carried by moving air passing through the HVAC system and ultimately delivered as air contaminants to rooms in which such contaminated air may be breathed in by humans. An air filter system is described for removing air contaminants from moving air passing through a register or grille between an air duct of a HVAC system and a room. The air filter system includes one or more air filters within an interface housing or secured by a frame that is attached or adhered to the register or grille so that the air filter removes at least some of the air contaminants in the moving air passing from the air duct through the register or grille before it enters the room. Methods for assembling and manufacturing air filter systems are also described.

A vehicle system includes: a heating, ventilation, and air conditioning (HVAC) system including: a passenger cabin air filter; and a blower configured to draw air through the passenger cabin air filter and blow air into a passenger cabin of a vehicle; an olfaction sensor configured to measure an amount of a chemical in air in a duct of the HVAC system downstream of the passenger cabin air filter; and a filter module configured to determine and indicate whether to replace the passenger cabin air filter based on the amount of the chemical in the air measured by the olfaction sensor.

A gas purifying and processing method for exercise environment is provided and includes steps: (a) providing a purification device for exercise environment in an exercise environment, wherein the purification device for exercise environment includes a main body, a purification unit, a gas guider and a gas detection module; (b) detecting a particle concentration of the suspended particles contained in the purified gas in real time by the gas detection module; and (c) detecting, issuing an alarm and/or notification, and notifying an exerciser to stop exercising, and feeding back to the purification device to adjust an airflow rate of the gas guider by the gas detection module, wherein the gas guider discharge a gas at the airflow rate within 3 minutes to reduce the particle concentration of the suspended particles to less than 0.75 μg/m.sup.3, wherein the airflow rate is at least 800 ft.sup.3/min, and the main body maintains a breathing distance ranged from 60 cm to 200 cm.

A rigid, channel-framed, non-compressible, non-nestable, pleated air filter, comprising: a tightly-pleated air filter media comprised of a nonwoven fibrous web and with an upstream face and a downstream face, wherein the tightly-pleated air filter media comprises a plurality of upstream (and downstream) pleat tips and upstream (and downstream) pleat valleys, the tightly-pleated air filter media comprising a plurality of upstream (and downstream) linear bridging filaments that are at least substantially parallel to each other and are oriented at least substantially orthogonal to the pleat direction and are extrusion-bonded to at least some of the upstream (and downstream) pleat tips, and, a channel frame comprising four major frame portions, with each major frame portion being mounted on one of the four major edges of the pleated air filter media.

The present invention comprises: a first filter, and a second filter positioned in the slipstream of the first filter in the airflow direction; a dust amount sensor positioned before the first filter in the airflow direction, having a hole part through which dust passes, and transmitting, per unit of time, each of a first total, which is the amount of dust in a first size range, and a second total, which is the amount of dust in a second size range smaller than the first size range, of the dust passing through the hole part; and a control unit for outputting the service signal of the first filter if the accumulated value of the first total transmitted from the dust amount sensor exceeds a first set value, and outputting the service signal of the second filter if the accumulated value of the second total transmitted from the dust amount sensor exceeds a second set value, wherein the optimum service time of each of the first filter and the second filter, which are capable of filtering dust of different sizes, can be independently calculated such that the unnecessary service of one of the first filter and the second filter can be blocked, and the optimum service time according to the indoor quality can be indicated.