Immersion tank and electronic apparatus

1. An immersion tank comprising: a tank main body that includes a storage unit that stores a cooling liquid in which an electronic device is immersed, an upper part of the storage unit having an opening; a lid body that includes a top wall portion and a side wall portion, and is paired with the tank main body; and a gas-phase heat exchanger that cools a space between the storage unit and the top wall portion; wherein the gas-phase heat exchanger is arranged in the space, and is supplied with a refrigerant from outside of the tank main body, while sending the supplied refrigerant to the storage unit; and further comprising a liquid-phase heat exchanger that is arranged in the storage unit, and is supplied with the refrigerant from the gas-phase heat exchanger, while discharging the supplied refrigerant to outside of the tank main body.

2. The immersion tank according to claim 1 , further comprising a heat exchanger that spans the storage unit and the space, wherein the gas-phase heat exchanger and the liquid-phase heat exchanger are provided in the heat exchanger.

3. The immersion tank according to claim 1 , wherein the gas-phase heat exchanger is fixed to the lid body, and the liquid-phase heat exchanger is fixed to the tank main body, and is 30 connected to the gas-phase heat exchanger via a flexible pipe.

4. The immersion tank according to claim 3 , wherein

the flexible pipe includes an extra length portion that allows the lid body to be opened and closed.

5. The immersion tank according to claim 1 , wherein the liquid-phase heat exchanger is arranged along an inner side surface of the storage unit.

6. The immersion tank according to claim 1 , wherein the liquid-phase heat exchanger causes heat exchange between a refrigerant that flows inside the liquid-phase heat exchanger and the cooling liquid in the storage unit.

7. The immersion tank according to claim 1 , further comprising a releasing duct that is connected to the gas-phase heat exchanger, and releases the refrigerant supplied from the gas-phase heat exchanger to the storage unit as the cooling liquid, wherein the tank main body includes a discharge port through which the cooling liquid in the storage unit is discharged to outside of the tank main body.

8. The immersion tank according to claim 7 , wherein

the releasing duct extends from the gas-phase heat exchanger to the storage unit.

9. The immersion tank according to claim 7 , wherein

the releasing duct releases the refrigerant supplied from the gas-phase heat exchanger to a lower portion of the storage unit as the cooling liquid, and

the discharge port is arranged in an upper portion of the storage unit.

10. The immersion tank according to claim 7 , wherein

the releasing duct includes a release hole that is arranged in a lower portion of the storage unit, and releases the refrigerant supplied from the gas-phase heat exchanger.

11. The immersion tank according to claim 1 , wherein

the space is formed across the tank main body and the lid body, and

at least a part of the gas-phase heat exchanger is accommodated in the space on the lid body side.

12. The immersion tank according to claim 1 , wherein

the lid body is supported by the tank main body via a hinge portion so as to be openable and closable.

13. The immersion tank according to claim 1 , further comprising

a sealing material that is arranged between the tank main body and the lid body, and surrounds the opening.

14. The immersion tank according to claim 1 , further comprising

a fixing hook that fixes the lid body to the tank main body.

15. The immersion tank according to claim 1 , wherein

the top wall portion covers the opening from above.

16. The immersion tank according to claim 1 , wherein

the gas-phase heat exchanger causes heat exchange between a refrigerant that flows inside the gas-phase heat exchanger and air in the space.

17. An electronic apparatus comprising: an immersion tank; and an electronic device accommodated inside the immersion tank, wherein the immersion tank includes: a tank main body that includes a storage unit that stores a cooling liquid in which the electronic device is immersed; an upper part of the storage unit having an opening; a lid body that includes a top wall portion and a side wall portion, and is paired with the tank main body; and a gas-phase heat exchanger that cools a space between the storage unit and the top wall portion; wherein the gas-phase heat exchanger is arranged in the space, and is supplied with a refrigerant from outside of the tank main body, while sending the supplied refrigerant to the storage unit; and further comprising a liquid-phase heat exchanger that is arranged in the storage unit, and is supplied with the refrigerant from the gas-phase heat exchanger, while discharging the supplied refrigerant to outside of the tank main body.

18. An immersion cooling system comprising: an immersion tank; an electronic device accommodated inside the immersion tank; and an external cooling device that is arranged outside the immersion tank, and cools a refrigerant, wherein the immersion tank includes; a tank main body that includes a storage unit that stores a cooling liquid in which the electronic device is immersed, an upper part of the storage unit having an opening; a lid body that includes a top wall portion and a side wall portion, and is paired with the tank main body; and a gas-phase heat exchanger that cools a space between the storage unit and the top wall portion; wherein the gas-phase heat exchanger is arranged in the space, and is supplied with the refrigerant from outside of the tank main body, while sending the supplied refrigerant to the storage unit; and further comprising a liquid-phase heat exchanger that is arranged in the storage unit, and is supplied with the refrigerant from the gas-phase heat exchanger, while, discharging the supplied refrigerant to outside of the tank main body.