Cooling device and electronic device

An electronic device comprising:

• an electronic component;
• and
• a cooling device to cool the electronic component,
• wherein the cooling device includes
• an immersion tank to store a coolant where the electronic component is immersed and cause the coolant to evaporate by heat from the electronic component into vapor,
• a condenser tube including a starting end to which the vapor is supplied and a termination end from which the condensed vapor is discharged,
• an isolating part arranged in a midway part of the condenser tube, the isolating part to isolate the condensed coolant from air and take out the air to outside of the condenser tube,
• a coolant tank to accommodate the termination end of the condenser tube and the isolating part inside and store the coolant discharged from the condenser tube, the coolant tank including a hole through which air passes,
• an air tube that has a starting end coupled to the coolant tank and a termination end coupled to the starting end of the condenser tube, the air tube to supply air from the coolant tank to the condenser tube,
• a liquid tube to supply the coolant from the coolant tank to the immersion tank, and
• a steam tube to supply the vapor from the immersion tank to the condenser tube.