Patent ID: 7025493

Claim:
A chemical supply system, comprising: at least two supply pipes for supplying at least two different chemicals; a mixing unit connected to the supply pipes for mixing at least two different chemicals to form a chemical mixture, the mixing unit including: an external housing wherein the at least two different chemicals are combined and filtered, one portion of the external housing being connected to one supply pipe and another portion of the external housing being connected to another supply pipe, and an inlet pipe having a plurality of inlet holes floated within the external housing and coupled to an exhausting unit; the exhausting unit positioned at least partially inside the mixing unit for exhausting the chemical mixture externally; and a filtering unit provided between the mixing unit and the exhausting unit for filtering the chemical mixture to prevent chemical particles having more than a predetermined size from being exhausted from the external housing, wherein the at least two supply pipes and an outlet pipe are installed at a first end of the external housing, a mixing fan is installed at a second end of the external housing, and a diameter of the external housing steadily decreases from the first end to the second end.