Evaporative concentration device and automatic analysis device

An evaporative concentration device configured to concentrate a liquid stored in a container by evaporating the liquid, the evaporative concentration device comprising:

• a decompression source configured to generate a negative pressure for decompressing an inside of the container;
• an exhaust unit configured to discharge vapor from the container, the vapor being generated from the liquid stored in the container, wherein the exhaust unit includes a first exhaust unit configured to discharge vapor from a first container and a second exhaust unit configured to discharge vapor from a second container;
• a decompression flow path that connects the exhaust unit and the decompression source, wherein the decompression flow path includes a first flow path and a second flow path connected in parallel to the same decompression source;
• a branch flow path branched from the decompression flow path between the container and the decompression source;
• a decompression valve configured to control an internal pressure of the container by opening and closing the decompression flow path, the decompression valve is configured to perform an operation of opening and closing the first flow path and an operation of opening and closing the second flow path independently of each other;
• a controller configured to control the decompression valve, wherein the decompression valve includes a first valve configured to open and close the first flow path and a second valve configured to open and close the second flow path, and wherein the controller is further configured to control the first valve and the second valve independently of each other;
• and
• a branch valve configured to open and close the inside of the container to and from the atmosphere by opening and closing the branch flow path, wherein,
• the first flow path is connected to the first exhaust unit and not connected to the second exhaust unit, and thereby configured to depressurize the first container independently of the second container,
• the second flow path is connected to the second exhaust unit and not connected to the first exhaust unit, and thereby configured to depressurize the second container independently of the first container, and
• the controller is further configured to depressurize the first container and the second container independently of each other by controlling the first valve and the second valve independently of each other.