Patent ID: 11961378
Assignee: nan
Field: Chemical engineering (Chemistry)
Classification: CPC B  G | IPC B  G

Claim 15:
16. The aspirating smoke sensing apparatus according to claim 11, wherein the charge collector comprises a bias electrode, a collecting electrode, and a collecting electric field formed by the bias electrode and the collecting electrode, and a negative pressure fluid field; the collecting electrode comprising a plurality of sub-collecting electrodes, and the charge collector is specifically configured to:
the negative pressure fluid field being an air path model for endowing particles in the air sample with kinetic energy to move forward formed, which is formed between the negative pressure source for air path detection and an annular narrow jet orifice of the air sample in the charge collecting electrode;
receive a control parameter sent by the controller;
adjust a voltage of the bias electrode according to the control parameter, so that the charged particles with different particle-sizes in the unipolar charged air sample fall onto sub-collecting electrodes corresponding to particle-size grades of the charged particles.