| 摘要 |
PURPOSE: A pneumatic hatching apparatus is provided, which enhances hatching rate of the aquarium fish and survival rate of the hatched fish. CONSTITUTION: A pneumatic hatching apparatus comprises: a case(2) in which the top of the pneumatic room is shut tightly by a cover; a first flow hole(31) in which the water of the inside tank flows in the bottom part of the pneumatic room; a first switching part(32) opening and closing the first flow hole; a second flow hole(41) which is slotted so that water can flow in; a second opening and closing part(42) opening and closing the second flow hole; an air pump supplying the pneumatic pressure to the pneumatic room; a three way valve which is operated so that the pneumatic room can communicate with atmospheric air; and a controller changing the way valve. |
