HEAT PIPE

• US 20190011196A1
• Filed: 07/06/2018
• Published: 01/10/2019
• Est. Priority Date: 07/06/2017
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Energy Systems & Solutions Corporation (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation), Toshiba Energy Systems & Solutions Corporation (Toshiba Corporation)
• Inventors: HOSHINO, Kunio, KIMURA, Rei, YAMAMOTO, Yasushi, FUKUTA, Masato, MAWATARI, Takashi, ABE, Satoru
• Granted Patent: US 10,712,099 B2
• Time in Patent Office: Days
• CPC Class Codes: F28D 15/0233 the conduits having a particular shape, e.g. non-circular cross-section, annular F28D15/0241, F28D15/0266 take precedence
• CPC Class Codes: F28D 15/025 having non-capillary condensate return means
• CPC Class Codes: F28D 15/0266 with separate evaporating and condensing chambers connected by at least one conduit; Loop-type heat pipes; with multiple or common evaporating or condensing chambers F28D15/043 takes precedence
• CPC Class Codes: F28D 15/06 Control arrangements therefor
• CPC Class Codes: H01L 23/427 Cooling by change of state, e.g. use of heat pipes by liquefied gas H01L23/445
• CPC Class Codes: H05K 7/20336 Heat pipes, e.g. wicks or capillary pumps

Abstract

A heat pipe, includes; an outer tube including a first end and a second end, the first end closed to be air tight; a box connected to the second end of the outer tube, a cross-sectional area of the box perpendicular to the central axis of the outer tube is larger than a cross-sectional area of the outer tube perpendicular to its axis; an inner tube positioned in the outer tube, a central axis of the inner tube parallel to the central axis of the outer tube, including a third end and a fourth end, the third end of the inner tube closer to the first end of the outer tube than the forth end of the inner tube and open in the outer tube; a partition tube including a fifth end and a sixth end and wider from the fifth end toward the sixth end, the fifth end of the partition tube connected with the fourth end, a part of the sixth end connected on an inner surface of the box; and a fluid in a space formed by the outer tube and the box.

Claims

1. A heat pipe, comprising;

an outer tube including a first end and a second end, the first end closed to be air tight;

a box connected to the second end of the outer tube, a cross-sectional area of the box perpendicular to the central axis of the outer tube is larger than a cross-sectional area of the outer tube perpendicular to its axis;

an inner tube positioned in the outer tube, a central axis of the inner tube parallel to the central axis of the outer tube, including a third end and a fourth end, the third end of the inner tube closer to the first end of the outer tube than the forth end of the inner tube and open in the outer tube;

a partition tube including a fifth end and a sixth end and wider from the fifth end toward the sixth end, the fifth end of the partition tube connected with the fourth end, a part of the sixth end connected on an inner surface of the box; and

a fluid in a space formed by the outer tube and the box.

2. The heat pipe according to claim 1, further comprising

a cooling plate parallel to an inner surface of the partition tube.

3. The heat pipe according to claim 2, wherein

the cooling plate comprises a wire mesh.

4. The heat pipe according to claim 1, wherein

the inner tube includes a part that widen toward the third end.

5. The heat pipe according to claim 1, further comprising

a porous material in a second flow path between an inner surface of the outer tube and an outer surface of the inner tube.

6. The heat pipe according to claim 1, further comprising

a check valve in a first flow path in the inner tube, to block a flow of the fluid from the second flow path to the first flow path.

7. The heat pipe according to claim 6, wherein

the check valve includes a ball to close the first flow path by a buoyancy applied to the ball, the buoyancy generated by a flow of the fluid from the second flow path to the first flow path.