Door hinge louver air return
The door hinge-shaped louver return air outlet is based on the LFK-3 type air outlet with an additional inner frame. The entire air outlet is in the form of a valve. The blade and the frame can be closed freely, which is beneficial for installation and supporting use with the filter. The return air from the room. The filter matched with this air outlet is fixed on the valve. Therefore, the valve can be opened as long as the bolts on both sides of the valve are gently moved by hand, and then the filter can be withdrawn from the valve; when closing, just push the valve up, spring on both sides The door bolt can be automatically locked, and the appearance is flat.