Carbon dioxide supply system

A carbon dioxide supply system for supplying carbon dioxide, comprising:

• a reservoir reserving the carbon dioxide;
• a pump arranged on a downstream side of the reservoir in a supply direction for the carbon dioxide for feeding the carbon dioxide with pressure while suppressing pulsation;
• a first pipe connecting the reservoir and the pump with each other;
• a second pipe connected to the downstream side of the pump in the supply direction and having no pulsation buffering means for buffering pulsation of the pump;
• a third pipe connected to the first pipe and the second pipe for refluxing the carbon dioxide fed by the pump with pressure from the second pipe to the first pipe when stopping the supply of the carbon dioxide;
• an on-off valve provided on an end portion on an upstream side of the third pipe in a reflux direction for the carbon dioxide from the second pipe to the first pipe for blocking the passage of the carbon dioxide from the second pipe to the third pipe when supplying the carbon dioxide;
• and
• a cooling apparatus interposed at least in an intermediate portion of the first pipe.