Boiling refrigerant type cooling system
AssigneeHitachi, Ltd.
InventorsKazuaki Suzuki, Shigemasa Sato, Akio Idei
Life of this patent
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Abstract
A boiling refrigerant type cooling system to suppress overshoot upon start of heat generation and realize stable start of boiling. In the boiling refrigerant type cooling system, a metal boiling heat transfer unit has a base in thermal contact with a heat generating body. The boiling heat transfer unit is in contact with a liquid refrigerant. The boiling heat transfer unit has plural parallel tunnels communicating with the outside via holes or gaps under its surface, a groove deeper than a tunnel diameter formed through all the tunnels in an orthogonal direction to the tunnels, and a cover plate on the groove.
Claims7
A boiling refrigerant type cooling system comprising:
- a heat reception jacket, attached to a heat generating body provided on a circuit board, that vaporizes a liquid contained inside by heat from the heat generating body;
- a condenser that receives steam from the heat reception jacket and transmits heat to the outside so as to condense the steam to the liquid;
- a first pipe that conducts the steam from the heat reception jacket to the condenser;
- and
- a second pipe that conducts the liquid from the condenser to the heat reception jacket,
- wherein the heat reception jacket comprises a boiling heat transfer unit which contacts the liquid and is in thermal contact with the heat generating body, and
- wherein the boiling heat transfer unit comprises:
- a plurality of parallel tunnels under a surface, wherein the plurality of parallel tunnels communicate with the outside via gaps,
- a groove formed through the plurality of parallel tunnels, wherein the groove is closer than the plurality of parallel tunnels to the heat generating body, and
- a cover plate on the groove.
A boiling refrigerant type cooling system comprising:
- a heat reception jacket, attached to a heat generating body provided on a circuit board, which vaporizes a liquid contained inside by heat from the heat generating body;
- wherein the heat reception jacket comprises a boiling heat transfer unit in thermal contact with the heat generating body, and
- wherein the boiling heat transfer unit comprises:
- a plurality of parallel tunnels, wherein the parallel tunnels communicate with the outside via gaps,
- a groove formed through the plurality of parallel tunnels, wherein the groove is closer than the plurality of parallel tunnels to the heat generating body, and
- a cover plate on the groove.
A boiling refrigerant type cooling system comprising:
- a heat reception jacket, attached to a heat generating body provided on a circuit board, which vaporizes a liquid contained inside by heat from the heat generating body;
- wherein the heat reception jacket comprises a boiling heat transfer unit in thermal contact with the heat generating body, and
- wherein the boiling heat transfer unit comprises:
- a plurality of parallel tunnels, wherein the parallel tunnels communicate with the outside via gaps,
- a groove formed through the plurality of parallel tunnels, and
- a cover plate on the groove.
Dependencies are inferred from the claim text.