Refrigerant direct cooling visualization test control platform and test method

The invention discloses a refrigerant direct cooling visualization test control platform and a test method, the refrigerant direct cooling visualization test control platform comprises a first-stage compression circulation loop and a second-stage compression circulation loop, and a shared evaporative condenser is arranged between the first-stage compression circulation loop and the second-stage compression circulation loop; the second-stage compression circulation loop comprises a test loop, a bypass loop and a second-stage compressor; the test loop is connected in parallel with the bypass loop; the test loop comprises a first electromagnetic expansion valve and a visual test body which are connected in sequence; a high-speed monitoring camera is correspondingly arranged on the outer side of the visual test body; the bypass loop comprises a second electromagnetic expansion valve and a bypass flow channel which are connected in sequence; the bypass flow channel and the visual test body are connected with the s