The present invention relates to a multi-modes heat exchanger and air ventilation system and method. The system's different modes are possible with the rotation of fan assemblies allowing airflow into specific ducts, thus acting both as fans and as valves. Each air handing unit is connected to a centralized network which allows the control of multiple units simultaneously in response to interior or exterior air characteristics.

An air purification piece and an air purification module including same. The air purification piece includes a substrate piece and a purification coating (4), which is provided on the outer surface of the substrate piece; the substrate piece comprises a first support piece (11), a second support piece (12) and a heating component (2), which is provided between the first support piece (11) and the second support piece (12).

The method to control cleanroom conditions, including zone particle concentration, occupancy status, and heating, ventilation, and air conditioning (HVAC) system conditions, includes detecting a zone particle concentration, an occupancy status, and HVAC system conditions. The cleanroom includes the HVAC system in communication with the zone of the cleanroom and with a computer processor as a control unit of the cleanroom. The zone particle concentration, the occupancy status, and the HVAC system conditions are communicated to the computer processor, and a desired zone particle concentration is determined based on a range of desired HVAC system conditions with model predictive control. A first control signal to the HVAC system based on the occupancy status, the zone particle concentration, and the desired zone particle concentration is determined. The first control signal is communicated to the HVAC system, and the HVAC system activates according to the first control signal.

A method monitors an air-conditioner having a semi-conductor gas sensor, the method including: determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a first threshold when the fan is in operation; starting operation of the fan as a provisional operation if the detection value is equal to or greater than a second threshold when the fan is not in operation; stopping the provisional operation of the fan; determining that a refrigerant leakage has occurred on condition that the detection value is equal to or greater than a third threshold after stopping the provisional operation of the fan; and taking a predetermined action for outputting alarm information and/or limiting supply of refrigerant to the heat exchanger when a refrigerant leakage is determined to have occurred.

An indoor air quality control method using an intelligent air cleaner is disclosed. An indoor air quality control method using an intelligent air cleaner according to an embodiment of the present invention can predict indoor dust concentration progress on the basis of output values of a learning model having received dust concentration data as input values when the dust concentration data of an indoor place where the air cleaner is located is received from the air cleaner, and determine whether ventilation is required by comparing the predicted progress with outside dust concentration data received from the Meteorological Administration server. Accordingly, indoor dust concentration changes can be predicted and an appropriate ventilation time can be recommended. The intelligent air cleaner and the indoor air quality control method using the same of the present invention can be associated with artificial intelligence modules, devices related with the 5G service, and the like.

A method for indoor biological detection of a monitored space is provided including collecting and entering monitored space information to determine density and location of sensors for monitoring air for an aerosol plume, distributing the sensors throughout the space, monitoring air and detecting and characterizing a plume event, determining a source location, collecting and preparing an air sample upon the detection of the plume event, and assaying the air sample to identify a hazardous release utilizing a field screening device. The method continues with the steps of initiating a precautionary response for the hazardous release characterizing the plume as biological or non-biological and initiating a protective response. A system is also provided.

A communication unit is provided for an air treatment apparatus. The communication unit includes a receiver, a transmitter, and a storage. The receiver receives measurement data sent from a measuring apparatus separate from the air treatment apparatus. The measuring apparatus is movable. The transmitter transmits, to a server, the measurement data associated with specific information of the air treatment apparatus. The storage stores the measurement data therein. If a storage process in which the measurement data is stored in the storage is completed, the transmitter transmits, to the measuring apparatus, information indicating that the storage process has been completed.

A device detects that a first wearable device has connected to a network. The device receives user preferences from the first wearable device. The device identifies a set point corresponding to a climate parameter. The device receives climate information corresponding to the climate parameter from one or more sensors. The device determines whether the climate information is within a threshold percentage of the set point, and based on the determination that the climate information is not within the threshold percentage of the set point, the device adjusts the set point.

There is an air purification system comprising, at least one housing, at least one pump configured to pump a biological purification solution through the housing. at least one fan configured to draw air into the housing. Air is cleaned and flows in a direction transverse to the direction of flow of the enhanced fluid. There can be at least one sensor which determines a level of biological impurities or contaminants in the air. There can also be at least one controller configured to control a rate of movement of said at least one fan based upon a level of impurities detected by the sensor. In at least one embodiment there can be at least one clean room which is configured to clean the air through at least one air purification system comprising one having an enhanced fluid or one that uses UV light and at least on HEPA filter.

A heating, ventilation and air conditioning (HVAC) unit can flow conditioned air into an indoor space through a first flow pathway, and receive returned air from the indoor space through a second flow pathway. A sensor module is positioned in the second flow pathway to receive the return air from the indoor space and determine that a quantity of volatile organic compounds (VOCs) in the return air exceeds a threshold VOC quantity. In response, the HVAC unit can flow a quantity of the return air out of the second flow pathway and into the atmosphere, and draw, into the second flow pathway, an equal quantity of air from the atmosphere. The HVAC unit can flow a remainder of the return air and the drawn quantity of air from the atmosphere into the first flow pathway to be conditioned and flowed into the indoor space.