System, control device, method for determining loading status of air filter of air filter device

A control device for an air filtration system for filtering air of an enclosed volume, the control device configured to determine a loading status of at least one air filter of an air filter device of the air filtration system, the control device comprising an electronic control unit in signal or data communication with a memory having instructions stored therein, the instructions, when executed by the electronic control unit, causes the electronic control unit to obtain

• a first parameter indicative of a level of particulate pollution in an external air external to the enclosed volume;
• a second parameter indicative of a level of particulate pollution in a recirculated air;
• a third parameter indicative of a flow of the external air in a channel;
• a fourth parameter indicative of a flow of the recirculated air in the recirculation channel;
• and
• a fifth parameter indicative of an efficiency of the at least one filter of the air filter device,
• wherein the electronic control unit is configured to output the loading status of the at least one air filter of the air filter device based on, the first parameter, second parameter, third parameter, fourth parameter, and fifth parameter as inputs.

A method for operating an air filtration system for filtering air of an enclosed volume, wherein the air filtration system comprises

• a channel for receiving external air external to the enclosed volume;
• a recirculation channel for receiving recirculated air from the enclosed volume, the recirculation channel connected to the channel at a junction to provide the recirculated air from the enclosed volume to the channel;
• an air filter device for filtering an air flow into the enclosed volume, the air flow comprising at least one of the external air and the recirculated air, wherein the air filter device is arranged in relation to the channel and/or the recirculation channel;
• and
• an electronic control unit for determining a loading status of at least one air filter of the air filter device, wherein the method comprises the steps of
• obtaining, by the electronic control unit, a first parameter indicative of a level of particulate pollution in the external air;
• obtaining, by the electronic control unit, a second parameter indicative of a level of particulate pollution in the recirculated air;
• obtaining, by the electronic control unit, a third parameter indicative of a flow of the external air in the channel;
• obtaining, by the electronic control unit, a fourth parameter indicative of a flow of the recirculated air in the recirculation channel;
• obtaining, by the electronic control unit, a fifth parameter indicative of an efficiency of the at least one air filter of the air filter device;
• and
• outputting, by the electronic control unit, the loading status of the at least one air filter of the air filter device based on, the first parameter, second parameter, third parameter, fourth parameter, and fifth parameter as inputs.