AIR LIFT APPARATUS HAVING AIR SUPPLY APPARATUS HAVING COIL SPRING SHAPE

摘要

The present invention provides an air lift apparatus having an air supply device in a coil spring shape, capable of easily supplying air up to the bottom surface of a fish farm by applying a relatively smaller air pressure. According to one embodiment of the present invention, the air supply apparatus comprises: a cylindrical core member placed at the center and made of a metallic material; a sheath member placed close to the outer circumference of the core member to water-tightly surround the core member; and an air dispersion member placed by being spaced apart from the sheath member in a predetermined distance to form an air supply path (S) between an outer circumferential surface of the sheath member and an inner circumferential surface of the air dispersion member. Therefore, the air supply device can have a coil spring shape formed by winding a shape of the core member in the coil spring shape.