Particle separating and measuring device and particle separating and measuring apparatus

A particle separating and measuring apparatus, comprising:

• a particle separating and measuring device including:
• a first flow path device that is plate-shaped, and including
• a pre-separation flow inlet configured to receive a fluid containing target particles to be separated,
• a main flow path connected to the pre-separation flow inlet,
• a plurality of branch flow paths connected to the main flow path, and
• a post-separation flow outlet configured to discharge a first fluid containing the target particles after being separated;
• and
• a second flow path device that is plate-shaped, and including
• a first region configured to receive the first flow path device,
• a second region configured to measure the target particles,
• a first flow inlet configured to receive the first fluid,
• a second flow inlet configured to receive a second fluid free from the target particles,
• a first flow path located in the second region and connected to the first flow inlet to allow a flow of the first fluid, and
• a second flow path located in the second region and connected to the second flow inlet to allow a flow of the second fluid;
• wherein a lower surface of the first flow path device includes the post-separation flow outlet, and an upper surface of the second flow path device includes the first flow inlet in the first region, and the post-separation flow outlet faces and connects to the first flow inlet, and
• wherein the second flow path device has a connection flow path vertically extending from an opening of the first flow inlet to the first flow path, and the connection flow path having an inclined inner wall narrows from the opening of the first flow inlet toward the first flow path;
• an optical sensor configured to emit light toward the first flow path and the second flow path in the particle separating and measuring device, and receive light passing through the first flow path and the second flow path;
• and
• a controller configured to measure the target particles by comparing an intensity of the light passing through the first flow path and received by the optical sensor with an intensity of the light passing through the second flow path and received by the optical sensor.