An air purifying system includes an air purifier mechanism, a controller, and a sensing device. The sensing device is configured to measure an air quality parameter of the air entering the housing via the air inlet to generate inlet air quality data, and to measure an air quality parameter of the purified air exiting the housing via the air outlet to generate outlet air quality data. The controller is configured to: receive the inlet air quality data and the outlet air quality data, compare the inlet air quality data and the outlet air quality data with their corresponding predetermined threshold ranges, and determine an action to be taken.

A method for operating an assistance system in a motor vehicle detects at least one odor profile using a respective odor sensor. The at least one odor profile is defined by concentrations of at least two odorous substances. The method carries out one or more assistance functions depending on the detected at least one odor profile.

An odor detection device includes an odor sensor for measuring an ambient odor, a fan that exhausts air around the odor sensor, and a substrate for controlling the fan and the odor sensor. Electric power supplied to the odor sensor, the fan, and the substrate is supplied from outside of the odor detection device, the substrate includes a connection unit capable of transmitting and receiving data to and from an external device that is a device separate from the odor detection device, and the fan is installed downstream of an airflow generated by the fan itself with respect to the odor sensor.

A cooking fume mitigation system may have an exhaust hood configured to capture fumes from a cooking appliance, the exhaust hood conveying fumes to a particulate removal stage which conveys fumes to an odor removal stage. The system may also have an inlet volatile organic compound (VOC) sensor upstream of the odor removal stage and an outlet VOC sensor downstream of the odor removal stage. The odor removal stage may include a carbon filter or an ultraviolet light source. The particulate removal stage may include a pocket filter or an electrostatic precipitator filter. The system may also have a controller that receives signals from the inlet and outlet VOC sensors and uses the signals to generate data indicative of a remaining life of the carbon filter.

An air conditioner installable on a window frame and having a ventilation function. The air conditioner comprises a cabinet comprising a first inlet hole, a second inlet hole and a third inlet hole, a first heat exchanger provided inside the cabinet to allow indoor air, which is introduced through the first inlet hole, to exchange heat, a second heat exchanger provided inside the cabinet to allow outdoor air, which is introduced through the second inlet hole, to exchange heat, and a third heat exchanger provided inside the cabinet to be located between the first heat exchanger and the second heat exchanger in a height direction of the cabinet, and provided to allow outdoor air, which is introduced through the third inlet hole, and condensed water, which is generated in the first heat exchanger, to exchange heat with each other.

An air purifier (100) includes a detection unit (130) and a control unit (110). The detection unit (130) periodically detects environment information. The environment information indicates information relating to an environment around the air purifier (100). The control unit (110) determines whether or not the environment information satisfies a specific condition a plurality of times during the specific time period (Ts) corresponding to an event within a prescribed period (Ta). In a case where the control unit (110) determines that the environment information satisfies the specific condition a plurality of times, the control unit switches a mode from a learning mode to an implementation mode. In the implementation mode, in a case where the environment information meets a trigger during the specific time period, the control unit (110) performs event operational control.

An air purifier (100) includes a control unit (110). The control unit (110) is configured to acquire occupancy information indicating whether or not a person is in a room. The control unit (110) is configured to switch operational control based on a type of pet specified by a user and the occupancy information. When a person is not in the room, the control unit (110) preferably performs operational control to increase an airflow compared to that when a person is in the room.

A demand control ventilation system is disclosed. Sensors positioned in the building measure a corresponding air quality parameter. Each air quality parameter is indicative as to a current demand required for ventilation of the building based on human activity conducted by occupants present in the building. A controller monitors each air quality parameter to determine whether any air quality parameter deviates beyond the corresponding air quality parameter threshold. The controller activates a graduated action when each air quality parameter deviates beyond the corresponding air quality parameter threshold to automatically adjust the ventilation of the building to maintain the current demand of the ventilation within the current demand threshold. The current demand threshold is a ventilation level of the ventilation of the building that satisfies the current demand based on human activity and prevents unnecessary energy consumption to satisfy the current demand.

Proposed is air-conditioning and air-cleaning equipment including: a first air conditioning housing configured to draw in outside air and the inside air of the building to form mixed air; a second air conditioning housing configured to receive the mixed air from the first air conditioning housing and to stagnate the mixed air in the second air conditioning housing; a third air conditioning housing configured to receive a part of the mixed air from the second air conditioning housing; a fourth air conditioning housing configured to receive partial mixed air from the third air conditioning housing and to purify the partial mixed air to form clean air; and a fifth air conditioning housing configured to receive the clean air from the fourth air conditioning housing and to expel the clean air into the interior of the building.

Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for monitoring air quality with multiple sensing devices. The methods, systems, and apparatus include actions of: obtaining first sensor data from a sensor that is not an air quality sensor, determining that the first sensor data satisfy a first air quality criterion, in response to determining that the first sensor data satisfy the first air quality criterion, obtaining second sensor data from an air quality sensor, determining that the second sensor data satisfy a second air quality criterion, and based on a determination that the second sensor data satisfy the second air quality criterion, activating an air quality device.