The present invention provides an air filtering system for use in a building and an HVAC system, wherein the air filtering system includes: an outside-air inlet; a first filtering stage at the downstream of the outside-air inlet; a second filtering stage at the downstream of the first filtering stage; a collection module for collecting outside-air quality information; and a control module in communication with the collection module, wherein the control module adjusts an operation state of the first filtering stage and/or the second filtering stage based on the air quality information collected by the collection module. The system of the present invention has the advantages of energy saving, low maintenance cost, etc.

The present invention provides an air filtering system for use in a building and an HVAC system, wherein the air filtering system includes: an outside-air inlet; a first filtering stage at the downstream of the outside-air inlet; a second filtering stage at the downstream of the first filtering stage; a collection module for collecting outside-air quality information; and a control module in communication with the collection module, wherein the control module adjusts an operation state of the first filtering stage and/or the second filtering stage based on the air quality information collected by the collection module. The system of the present invention has the advantages of energy saving, low maintenance cost, etc.

An environmental control system for a building, the system including a vent. The vent includes one or more louvers configured to change position between an open position and a closed position to permit air from the air duct to enter a zone of the building or stop the air from entering the zone and a vent circuit configured to operate the one or more louvers based on one or more control commands. The system includes a controller device including a processing circuit configured to receive a selection of an operating profile from a plurality of predefined operating profiles for the vent, each of the plurality of predefined operating profiles indicating an intended use of the zone, determine, based on the operating profile, the one or more control commands, and cause the vent circuit to operate the one or more louvers based on the one or more control commands.

An environmental control system for a building, the system including a vent. The vent includes one or more louvers configured to change position between an open position and a closed position to permit air from the air duct to enter a zone of the building or stop the air from entering the zone and a vent circuit configured to operate the one or more louvers based on one or more control commands. The system includes a controller device including a processing circuit configured to receive a selection of an operating profile from a plurality of predefined operating profiles for the vent, each of the plurality of predefined operating profiles indicating an intended use of the zone, determine, based on the operating profile, the one or more control commands, and cause the vent circuit to operate the one or more louvers based on the one or more control commands.

A pollution monitoring system and a method is disclosed. The pollution monitoring system comprises an on-board sensor unit having a plurality of sensors, configured for monitoring air quality by measuring pollution data in the air and a power control unit connected with the on-board sensor unit for controlling the operation of the on-board sensor unit. The pollution monitoring system further comprises microcontroller configured for generating control signals to be transmitted to the power control unit for controlling operation of on-board sensor unit. The microcontroller is configured for receiving information from a base station regarding operation of the on-board sensor unit. Further, the pollution monitoring system comprises an air purification unit configured for receiving the pollution data from the microcontroller and enabling activation or deactivation of the air purification unit based on comparison of the pollution data with predefined threshold values.

A pollution monitoring system and a method is disclosed. The pollution monitoring system comprises an on-board sensor unit having a plurality of sensors, configured for monitoring air quality by measuring pollution data in the air and a power control unit connected with the on-board sensor unit for controlling the operation of the on-board sensor unit. The pollution monitoring system further comprises microcontroller configured for generating control signals to be transmitted to the power control unit for controlling operation of on-board sensor unit. The microcontroller is configured for receiving information from a base station regarding operation of the on-board sensor unit. Further, the pollution monitoring system comprises an air purification unit configured for receiving the pollution data from the microcontroller and enabling activation or deactivation of the air purification unit based on comparison of the pollution data with predefined threshold values.

A method, an air treatment device and a system associated with determining a degree of utilized capacity of a filter for processing air present in an ambient volume. Determining a total accumulated pollutant amount in the filter. Comparing the determined total accumulated pollutant amount to a reference pollutant amount to determine the degree of utilized capacity. The reference pollutant amount is a pollutant amount present in the filter when the air treatment device produces a predetermined clean air flow. The accumulated pollutant amount in the filter is determined based on data obtained from a sensor arranged to measure a current pollutant concentration in the ambient volume and/or pollutant concentration data indicative of a current pollutant concentration in the ambient volume and an estimated volume of air processed by the air treatment device. The volume is estimated based on a current air flow through the filter.

A method, an air treatment device and a system associated with determining a degree of utilized capacity of a filter for processing air present in an ambient volume. Determining a total accumulated pollutant amount in the filter. Comparing the determined total accumulated pollutant amount to a reference pollutant amount to determine the degree of utilized capacity. The reference pollutant amount is a pollutant amount present in the filter when the air treatment device produces a predetermined clean air flow. The accumulated pollutant amount in the filter is determined based on data obtained from a sensor arranged to measure a current pollutant concentration in the ambient volume and/or pollutant concentration data indicative of a current pollutant concentration in the ambient volume and an estimated volume of air processed by the air treatment device. The volume is estimated based on a current air flow through the filter.

A three-dimensional printing system for manufacturing three-dimensional articles includes an apparatus, a filtration system, and a controller. The apparatus is a fabrication system that generates ignitable powder dust in an inert atmosphere fluid stream. The filtration system receives the fluid stream and has a plurality of filter units in a parallel arrangement including at least a first filter unit and a second filter unit. The controller is configured to control the filtration unit and to thereby individually operate the plurality of filter units in two states including a filtration state and an oxidation state. When one of the plurality of filter units is operating in the filtration state another of the plurality of filter units is operating in the oxidation state.

An airborne pathogen extraction system that provides for continuous airborne pathogen particle extraction from a specifically targeted area in a room or a specifically targeted area proximate to a user. The pathogenic particles are filtered and/or disinfected before the air is returned proximate to the originating location, or are directed an area away from the user(s). The airborne pathogen extraction systems and methods lower the chances of contagion or infection from airborne pathogens, such as viruses.