Patent ID: 11885527
Assignee: KHANFILTER, INC.
Field: Chemical engineering (Chemistry)
Classification: CPC F  B | IPC F

Claim 0:
1. An air purification device comprising:
a housing which comprises a main passage section through which air is introduced from a room through a main inlet port and is discharged to an outside through a main outlet port, and a bypass passage section partitioned from the main passage section, through which air is introduced from the room through a bypass inlet port and is discharged to an outside through a bypass outlet port;
a main inlet port damper configured to open and close the main inlet port;
a main outlet port damper configured to open and close the main outlet port;
a bypass damper configured to open and close the bypass passage section;
a filter disposed within the main passage section;
a heater configured to heat the filter;
a regenerative circulation pipe of which both ends are respectively disposed on the main inlet port side and the main outlet port side to communicate with the main passage section;
a circulation fan installed in the regenerative circulation pipe to blow air in the regenerative circulation pipe into the main passage section; and
a controller configured to control the bypass damper so as to open the bypass passage section when the main passage section is closed due to a malfunction of the main inlet port damper or the main outlet port damper,
wherein, after the main inlet port damper and the main outlet port damper are operated to open the inlet and outlet passages, when continuously receiving a detection signal indicating that the main inlet port damper or the main outlet port damper is closed for a preset time, the controller determines that the main passage section is closed and operates the bypass damper to open the bypass passage.