Air purifier filter system, an air purifier and a method for controlling an air purifier

An air purifier, comprising:

• a fan;
• a housing for receiving an air purifier filter unit;
• a read circuit for reading a machine readable identifier of the air purifier filter unit or an input for receiving information read from the machine readable identifier of the air purifier filter unit, wherein the machine readable identifier stores type information identifying a filter type of the air purifier filter unit for removal of a target pollutant and stores performance information of the air purifier filter unit, over a period of time, specific to the target pollutant;
• and
• a processor which is adapted to derive information from the machine readable identifier concerning the filter type and the performance information specific to the target pollutant to be filtered by the air purifier filter unit from a plurality of different pollutants that can be filtered by the air purifier filter unit, wherein the performance information comprises a combination of a cumulative air flow and a cumulative amount of the target pollutant through the air purifier filter unit over the period of time, and further wherein, the performance information is used in estimating a lifetime of the air purifier filter unit for the target pollutant, a write circuit configured to update the performance profile stored on the machine readable identifier over the period of time as the air purifier filter unit removes the target pollutant, and to derive advice on changing the air purifier filter unit based on the filter type and the performance information for use when the air purifier filter unit is to be used for filtering the target pollutant.

An air purifier system, comprising:

• a removable filter, wherein the removable filter is able to filter a plurality of different pollutants according to a type of the removable filter;
• a machine readable identifier attached to the removable filter that stores type information indicating the type of the removable filter for removing a target pollutant and storing a performance profile indicating performance, over a period of time, of the type of the removable filter for filtering the target pollutant from the plurality of different pollutants, wherein the indication of the performance comprises a combination of a cumulative air flow and a cumulative amount of the target pollutant through the removable filter over the period of time, and further wherein, the indication of the performance is used in an estimation of a lifetime of the removable filter for the target pollutant;
• a reader circuit configured to read the type information and the performance profile from the machine readable identifier;
• a write circuit configured to update the performance profile stored on the machine readable identifier over the period of time as the air purifier filter removes the target pollutant;
• and
• a controller configured to receive the type information and the performance profile from the reader circuit, to predict an end of life of the removable filter based on the received type information and the received performance profile for the target pollutant, and to notify a user via a user interface when to change the removable filter based on the predicted end of life of the removable filter.