Fine dust measurement module and fine dust measurement device

A fine dust measurement device comprising:

• a first fine dust measurement module comprising a first fluid inlet;
• a second fine dust measurement module comprising a second fluid inlet;
• a third fine dust measurement module comprising a third fluid inlet;
• and
• an outlet connected to each of the first fine dust measurement module, the second fine dust measurement module, and the third fine dust measurement module,
• wherein the first fluid inlet is a fluid inlet into which fluid including fine dust with particles of various diameters flows,
• wherein the first fine dust measurement module further comprises:
• a first channel through which first fine dust, of the fine dust introduced through the fluid inlet, with first particles having a diameter greater than or equal to a first diameter passes;
• a second channel through which second fine dust, of the fine dust introduced through the fluid inlet, with second particles having a diameter less than the first diameter passes;
• a flow ratio control nozzle provided in the first channel and configured to control a flow ratio between a first portion of the fluid flowing into the first channel and a second portion of the fluid flowing into the second channel;
• and
• a fine dust sensor configured to sense the second fine dust passing through the second channel, and
• wherein the first channel comprises:
• a first region provided on a same plane as the second channel;
• a second region connected to the first region and provided on a different plane than the second channel;
• and
• a third region connected to the second region and provided on the same plane as the second channel.

A fine dust measurement module comprising:

• a fluid inlet into which fluid including fine dust with particles of various diameters flows;
• a first channel through which first fine dust, of the fine dust introduced through the fluid inlet, with first particles having a diameter greater than or equal to a first diameter passes;
• a second channel through which second fine dust, of the fine dust introduced through the fluid inlet, with second particles having a diameter less than the first diameter passes;
• a flow ratio control nozzle provided in the first channel and configured to control a flow ratio between a first portion of the fluid flowing into the first channel and a second portion of the fluid flowing into the second channel;
• a fine dust sensor configured to sense the second fine dust passing through the second channel;
• a second merged region in which the first channel and the second channel are merged;
• an outlet connected to the second merged region and discharging the fluid;
• and
• a choked nozzle provided between the second merged region and the outlet,
• wherein a ratio of an internal pressure of the outlet to a first pressure inside the second merged region is less than or equal to 0.528.