An air purification system includes an air purifier with a control unit and a filtration unit, at least one human-machine interface, at least one nomadic air sensor designed to be able to be coupled to the air purifier, or uncoupled from the air purifier, the control unit being designed to control the filtration unit according to at least one coupled operating mode taking into account measurement feedback from the air sensor, and one uncoupled operating mode not taking into account measurement feedback from the air sensor, wherein in the uncoupled operating mode of the air purifier, the human-machine interface is designed to display measurements from the nomadic air sensor.

An air quality system includes an air precleaner, a filter identification component, and a control module. The air precleaner has a precleaner housing and a filter disposed inside the precleaner housing. The filter identification component is positioned within the precleaner housing at a first position and is mounted on the filter. The control module is positioned within the precleaner housing at a second position and is configured to emit an electrical field and communicate with the filter identification component via the emitted electrical field.

In one or more embodiments, a vehicle VOC reduction system includes a VOC reducer to be in fluid communication with cabin air, a rechargeable battery unit at least partially powering the VOC reducer, and a transmitter to transmit commands to operate the VOC reducer.

An air-conditioning system of a motor vehicle to air-condition a vehicle interior may include a channel system through which air is flowable and an outside-air channel configured to let outside air into the channel system. The air-conditioning system may also include a system conveying device separating a suction area from a pressure area and a system filter device separating a raw area from a pure area. The system filter device may include a filter housing and a filter material. The air-conditioning system may additionally include a system outlet to let air into the vehicle interior and a sensor device, including a sensor housing, in which at least one analysis channel is arranged, through which air, a characteristic of which is measured, is flowable. The sensor device may also include at least one sensor inlet and at least one sensor outlet to let air in and out of the sensor device.

A vehicle cabin air filtration system has an electronic air filter which removes unwanted air particles from air prior to or after entry into a vehicle cabin. The vehicle cabin air filtration system also has a sensor configured to generate a signal indicative of a parameter and a controller operatively connected to the electronic air filter and the sensor. The controller receives the signal indicative of the parameter from the sensor, compares the parameter to a stored condition, and selectively activates or deactivates the electronic air filter based on the comparison.

Consumed energy and cost relating to control of a carbon dioxide concentration is reduced. Each of CO.sub.2 concentration control systems (100 to 105) includes a measuring unit (20) that measures a CO.sub.2 concentration, a CO.sub.2 absorption unit (30) that has a CO.sub.2 absorption material (31) for absorbing CO.sub.2 at a rate depending on the temperature thereof, and a control unit (10) that controls the temperature of the CO.sub.2 absorption material (31) by using exhaust heat of a power system (40), so as to control a CO.sub.2 absorption rate of the CO.sub.2 absorption material (31).

A carbon dioxide concentration control device (10) is provided with a control unit (15) that controls an absorption amount of carbon dioxide of a carbon dioxide absorbent (16) per unit hour, and a regeneration control unit (14) that generates the carbon dioxide absorbent (16), and a second drive energy supply unit (13) which is different from a first drive energy supply unit (11) that supplies power to the control unit (15) supplies power to the regeneration control unit (14), and thus a carbon dioxide concentration in a space is controlled to be an appropriate value for long periods of time.

An air filtration system for a passenger compartment of a motor vehicle includes a filter bed positioned downstream from a blower motor and upstream from one or more vents. The air filtration system additionally includes a heater coupled to the filter bed, a sensor configured to measure a functional capacity of the filter bed, and a controller configured to regenerate the filter bed using the heater as initiated by the real-time sensor.

An air-conditioning system of a motor vehicle comprises a channel system configured to allow air to flow therethrough during operation and at least one heat exchanger positioned within the main channel and configured to air-condition air supplied to a motor vehicle interior of the motor vehicle. The channel system comprises a main channel. The system further comprises a sensor device configured to measure an air characteristic of air to be analysed. The sensor device comprises an analysis channel which the air to be analysed can flow through, a generation device configured to generate electromagnetic waves penetrating the analysis channel, a sensor temperature-control space separated from the analysis channel, and a temperature-control channel configured to apply air-conditioned air to the generation device to control a temperature of the generation device. The generation device is at least partially arranged in the sensor temperature-control space.

An air-conditioning system comprises a channel system, a system conveying device positioned in the channel system and configured to convey air in the channel system, a sensor device comprising at least one analysis channel and configured to measure a characteristic of air flowing through the at least one analysis channel, and a suction jet pump comprising a motive-fluid inlet, a suction inlet, and a pump outlet. The system conveying device separates a suction area of the channel system arranged upstream of the system conveying device from a pressure area of the channel system arranged downstream from the system conveying device, and the sensor device further comprises a sensor outlet configured to release air from the sensor device. The motive-fluid inlet is fluidically connected to the pressure area via a suction jet branch-off point within the channel system, and the suction inlet is fluidically connected to the sensor outlet.