Patent ID: 7662345

Claim:
A fluid handling apparatus comprising an apparatus body and a plurality of fluid handling subassemblies arranged on the apparatus body, each of the fluid handling subassemblies comprising: an injecting section for injecting a fluid; a fluidized section for receiving the fluid from the injecting section to allow the fluid to continuously flow downwards; a fluid housing chamber for receiving the fluid from the fluidized section; a wall portion formed between the fluid housing chamber and the injecting section and between the fluid housing chamber and the fluidized section; an opening, formed in the wall portion wherein said opening is a slit which passes through said wall portion, for allowing the fluid to enter the fluid housing chamber; and a surface-area increasing means, arranged in the fluidized section, for increasing an area of a contact surface with the fluid in the fluidized section, wherein the opening extends from a lower end, which is positioned in the vicinity of the lower end of the fluidized section, to an upper end, which is higher than the upper end of the fluidized section, for allowing the injecting section and the fluidized section to be communicated with the fluid housing chamber.