CLOSED TYPE TISSUE DEHYDRATION SYSTEM AND CONTROL METHOD THEREFOR

A closed type tissue dehydration system and a control method therefor. In the system, a treating fluid inlet/outlet is connected to paraffin containers and reagent containers through valves; the closed type tissue dehydration system also comprises a first three-way valve (V1), a second three-way valve (V2), a third three-way valve (V3), and a fourth three-way valve (V4); and a first port (NC) of the third three-way valve (V3) and a first port (NC) of the fourth three-way valve (V4) are both connected to a gas inlet/outlet, a second port (NO) of the fourth three-way valve (V4) is respectively connected to a gas inlet and a gas outlet, a second port (NO) of the third three-way valve (V3) is connected to the gas outlet, a first port (NC) and a common port of the second three-way valve (V2) are respectively connected to the gas inlet and an inlet of a gas pump, a second port (NO) and a common port of the first three-way valve (V1) are respectively connected to the gas outlet and an outlet of the gas pump, and a f