Fluid control device

A fluid control device comprising:

• a first pump having a first hole and a second hole and configured to move a fluid between the first hole and the second hole;
• a second pump having a third hole and a fourth hole and configured to move a fluid between the third hole and the fourth hole;
• a container;
• a first communicating path communicating with the second hole and the third hole;
• a second communicating path communicating with the fourth hole and the container;
• and
• a first control unit configured to control driving of the first pump and the second pump,
• a valve provided in the second communicating path and configured to switch between opening the second communicating path to outside and closing the second communicating path from the outside;
• and
• a second control unit configured to control opening and closing of the valve,
• wherein the first control unit starts or stops driving of the first pump and the second pump,
• wherein the first control unit makes a driving start timing of an upstream-side pump with respect to the fluid earlier than a driving start timing of a downstream-side pump with respect to the fluid, the upstream-side pump being one of the first pump and the second pump, the downstream-side pump being another one of the first pump and the second pump, and
• wherein the second control unit starts closing the valve at the driving start timing of the upstream-side pump and starts opening the valve when at least the first pump or the second pump stops.