Filtration and purification device

A filtration and purification device, comprising:

• a main body having an inlet end and an outlet end;
• and
• at least one filtration passage layer disposed in the main body, wherein the at least one filtration passage layer comprises a plurality of purification chambers, a convergence chamber, and a circulation channel, wherein the purification chambers are arranged in parallel and bottoms of the purification chambers are in communication with the convergence chamber, and the circulation channel is in communication with the convergence chamber, wherein each of the purification chambers comprise at least one flow-guiding unit, at least one filtration unit, at least one gas sensor, and an outlet valve, wherein the circulation channel has an inlet valve disposed between the convergence chamber and the circulation channel, and each of the outlet valves is disposed between the corresponding purification chamber and the convergence chamber, and wherein each of the outlet valves controls the communication between the corresponding purification chamber and the convergence chamber, and the inlet valve control the communication between the convergence chamber and the circulation channel;
• wherein when the at least one flow-guiding unit is driven, a gas is introduced into each of the purification chambers from the inlet end of the main body, and the at least one filtration unit filters the gas and obtain a purified gas, wherein when the purified gas is introduced into the convergence chamber, the at least one gas sensor detects a gas quality of the purified gas to determine if a gas quality of the purified gas reaches a threshold for breathing, wherein when the purified gas does not reach the threshold for breathing, the inlet valve of the circulation channel is opened, so that the purified gas is capable of being introduced back to the at least one filtration passage layer, and wherein when the purified gas reaches the threshold for breathing, the purified gas is discharged out of the filtration and purification device from the outlet end.