The invention provides a photocatalyst air purifier.The photocatalyst air purifier comprises a shell, a photocatalyst layer, a luminous device, a fan and a control device.The shell is provided with an air flow inlet and an air flow outlet, and the photocatalyst layer is arranged inside the shell and is located between the air flow inlet and the air flow outlet and has a plurality of pores.The light-emitting device is arranged in the interior of the shell, the air flow generated by the fan enters the interior of the shell through the air flow inlet, and is discharged to the exterior of the shell through a plurality of pores of the photocatalyst layer and the air flow outlet.The control device is electrically connected to the light-emitting device to control the light-emitting device to irradiate the light source to the photocatalyst layer intermittently.Therefore, the invention can achieve the energy-saving effect under the excellent Photocatalyst purification effect through intermittent illumination of light source.本創作提供一種光觸媒空氣淨化機。光觸媒空氣淨化機包含殼體、光觸媒層、發光裝置、風扇以及控制裝置。殼體具有氣流入口以及氣流出口，光觸媒層設置於殼體的內部並位於氣流入口與氣流出口之間且具有多個孔隙。發光裝置設置於殼體的內部，風扇所產生的氣流通過氣流入口進入至殼體的內部，並通過光觸媒層的多個孔隙以及氣流出口，以排出至殼體的外部。控制裝置電性連接至發光裝置以控制發光裝置間歇性照射光源至光觸媒層上。藉此，本創作能通過間歇性照射光源，以在獲致優良的光觸媒淨化效果之下同時達到節能的功效。
