Method for determining utilized capacity of an air filter

1. A method for determining a degree of utilized capacity of a filter arranged in an air treatment device adapted to process air present in an ambient volume, wherein said air treatment device comprises a fan adapted to induce an air flow drawn from said ambient volume through said filter, the method comprising:

determining a total accumulated pollutant amount in the filter; and

comparing the determined total accumulated pollutant amount in the filter to a reference pollutant amount to determine said degree of utilized capacity, said reference pollutant amount is a pollutant amount present in said filter when said air treatment device produces a predetermined clean air flow;

wherein the total accumulated pollutant amount in the filter is determined based on:

data obtained from a sensor arranged to measure a current pollutant concentration in said ambient volume and/or pollutant concentration data indicative of a current pollutant concentration in said ambient volume; and

an estimated volume of air processed by the air treatment device, said volume being estimated based on a value indicative of a current air flow through said filter.

2. The method according to claim 1 , wherein said reference pollutant amount is based on an accelerated pollutant loading test of said filter.

3. The method according to claim 1 , wherein said value indicative of the air flow through said filter is at least in part dependent on a value indicative of a current accumulated pollutant amount in said filter.

4. The method according to claim 1 , wherein said value indicative of the air flow through said filter is based on data indicative of the performance of said fan.

5. The method according to claim 1 , wherein said value indicative of the air flow through said filter is based on data from a sensor arranged to measure said air flow.

6. The method according to claim 1 , wherein said total accumulated pollutant amount in the filter comprises at least one of a particle amount or a gas molecule amount.

7. The method according to claim 1 , wherein the current pollutant concentration is based on at least one of a particulate matter concentration value or a VOC-concentration value.

8. The method according to claim 1 , wherein said estimated volume of processed air is estimated over a certain period of time based on a multiplication of said value indicative of the current air flow through said filter and a length of said period of time.

9. The method according to claim 1 , further comprising the step of determining a remaining filter lifetime, wherein the determination of remaining lifetime is based on said current pollutant concentration level being substantially constant during the estimated remaining lifetime.

10. The method according to claim 1 , wherein the pollutant concentration data indicative of a current pollutant concentration in said ambient volume is outdoor concentration data representative for a geographical area where the air treatment device is located.

11. The method according to claim 10 , wherein the concentration data is collected by an external information provider and transferred to the air treatment device.

12. An air treatment device adapted to process air present in an ambient volume and further adapted to receive a filter, said device comprising:

a fan adapted to induce an air flow drawn from said ambient volume through said filter; and

circuitry;

wherein said circuitry is adapted to execute at least one of:

determining a total accumulated pollutant amount in the filter; and

comparing the determined total accumulated pollutant amount to a reference pollutant amount to determine a degree of utilized capacity, said reference pollutant amount being a pollutant amount present in said filter when said air treatment device produces a predetermined clean air flow;

wherein the accumulated pollutant amount in the filter is determined based on:

at least one of data obtained from a sensor arranged to measure a current pollutant concentration in said ambient volume or pollutant concentration data indicative of a current pollutant concentration in said ambient volume; and

an estimated volume of air processed by the air treatment device, said volume being estimated based on a value indicative of a current air flow through said filter.

13. A system comprising:

an air treatment device adapted to process air present in an ambient volume and further adapted to receive a filter, said device comprising:

a fan adapted to induce an air flow drawn from said ambient volume through said filter;

circuitry; and

a server;

wherein at least one of said circuitry and said server is adapted to execute at least one of:

determining a total accumulated pollutant amount in the filter; and

comparing the determined total accumulated pollutant amount to a reference pollutant amount to determine a degree of utilized capacity, said reference pollutant amount being a pollutant amount present in said filter when said air treatment device produces a predetermined clean air flow;

wherein the accumulated pollutant amount in the filter is determined based on:

at least one of data obtained from a sensor arranged to measure a current pollutant concentration in said ambient volume or pollutant concentration data indicative of a current pollutant concentration in said ambient volume; and

an estimated volume of air processed by the air treatment device, said volume being estimated based on a value indicative of a current air flow through said filter.