Abstract: An air purifier having a polygonal casing defining one or more inside corners, a cylindrical air filter extending along a center axis within the polygonal casing with a space formed between a radially outwards facing surface of the filter and at least one of the one or more the inside corners of the casing, and a filter cleaner at least partly located in the space. The filter cleaning has a cleaning member, a gear mechanism, at least one UV light source, a motor configured to drive the gear mechanism to thereby drive the radially outwards facing surface of a cylindrical air filter past the cleaning member and the at least one UV light source, and a filter cleaner housing encasing the motor, the cleaning member and the gear mechanism.

Abstract: A method of training a comfort model used for controlling a heating, ventilation, and air-conditioning, HVAC, system. The method includes: a user device providing a plurality of user feedbacks, each of the plurality of user feedbacks is provided at a respective point in time and describes a thermal comfort of a user using the user device; at each point in time associated with the plurality of user feedbacks, each of a plurality of HVAC devices detecting running parameters; and for each of the plurality of user feedbacks: inputting the running parameters of each of the plurality of HVAC devices detected at the respective point in time into the comfort model to generate a predicted thermal comfort, determining a loss value by comparing the predicted thermal comfort with the thermal comfort described by the respective user feedback, and training the comfort model to reduce the loss value.

Abstract: A heating, ventilation, and air-conditioning, HVAC, system and a method of controlling a HVAC system, The method includes: successively for at least two HVAC devices of a plurality of HVAC devices: controlling the HVAC device in accordance with a set target temperature value which is different from an environmental temperature value, wherein the other HVAC devices of the plurality of HVAC devices are deactivated or running with unvarying running parameters, and for at least two environmental sensors of a plurality of environmental sensors, determining whether environmental parameters detected by the environmental sensor change; correlating at least one environmental sensor to the HVAC devices for which a change of the environmental parameters is determined; and controlling the HVAC system to change at least one environmental parameter associated with the at least one environmental sensor using the HVAC devices correlated with the at least one environmental sensor.

Abstract: A method of controlling a heating, ventilation, and air-conditioning, HVAC, system.

Abstract: An air purifier having a polygonal casing defining one or more inside corners, a cylindrical air filter extending along a center axis within the polygonal casing with a space formed between a radially outwards facing surface of the filter and at least one of the one or more the inside corners of the casing, and a filter cleaner at least partly located in the space. The filter cleaning has a cleaning member, a gear mechanism, at least one UV light source, a motor configured to drive the gear mechanism to thereby drive the radially outwards facing surface of a cylindrical air filter past the cleaning member and the at least one UV light source, and a filter cleaner housing encasing the motor, the cleaning member and the gear mechanism.

Abstract: An air purifier and a filter cleaner are provided. The filter cleaner is configured to be mounted in an air purifier. The filter cleaner comprises a motor, a cleaning member and a gear mechanism. The motor is configured to drive the gear mechanism to drive a radially outwards facing surface of a cylindrical air filter or a filter holding case past the cleaning member. The air purifier can comprise a polygonal casing and the cylindrical air filter can be located inside the polygonal casing so that a space is formed between the radially outwards facing surface of the cylindrical air filter and the inside corners of the polygonal casing. The filter cleaner can be located in the space between the corner and the filter.

Abstract: An air purifier and a filter cleaner are provided. The filter cleaner is configured to be mounted in an air purifier. The filter cleaner comprises a motor, a cleaning member and a gear mechanism. The motor is configured to drive the gear mechanism to drive a radially outwards facing surface of a cylindrical air filter or a filter holding case past the cleaning member. The air purifier can comprise a polygonal casing and the cylindrical air filter can be located inside the polygonal casing so that a space is formed between the radially outwards facing surface of the cylindrical air filter and the inside corners of the polygonal casing. The filter cleaner can be located in the space between the corner and the filter.

Abstract: An air purifier and a filter cleaner in which the air filter can be placed in its operational position during the cleaning. The filter cleaner is configured to perform mechanical cleaning of the air-filter by making a cleaning member contact the surface of the air-filter for a first period of time, and to perform sterilization of the air-filter by applying UV light on the air-filter for a second period of time.