The present invention relates to an integrated
buoyancy and attitude adjustment
system for a manned submersible, comprising a manned submersible, a
ballast tank unit, a main pumping
assembly, an external circulation switch valve and a first switch valve, wherein one end of the external circulation switch valve is connected to the
ballast tank unit in a one-to-one correspondence, and the other end is connected to the main pumping
assembly, the other end of the main pumping
assembly is connected to the first switch valve, and the other end of the first switch valve is communicated with an
open sea environment; an internal circulation switch valve, wherein one end of the internal circulation switch valve is connected to the
ballast tank unit in a one-to-one correspondence, and the other end is connected to a pipeline between the main pumping assembly and the first switch valve; the external circulation switch valve cooperates with the main pumping assembly and the first switch valve to inject or
discharge seawater into or out of the
ballast tank unit; the internal circulation switch valve cooperates with the main pumping assembly, the first switch valve and the external circulation switch valve to complete water injection and drainage between each
ballast tank unit; the present invention overcomes the problems of complex design, high cost,
high energy consumption, short endurance and low reliability of the
buoyancy and attitude adjustment
system.