Patent ID: 11859913
Assignee: DAI NIPPON PRINTING CO., LTD.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F  H | IPC F  H

Claim 26:
27. A wick sheet for a vapor chamber, in which a working fluid is enclosed, the wick sheet comprising:
a sheet body having a first body surface and a second body surface provided on an opposite side from the first body surface;
a penetration space that penetrates the sheet body;
a first groove assembly provided on the second body surface, the first groove assembly communicating with the penetration space; and
a second groove assembly provided on the first body surface, the second groove assembly communicating with the penetration space, wherein
the first groove assembly includes a plurality of first mainstream grooves that extend in a first direction and a plurality of first communication grooves that extend in a direction different from the first direction and that communicate with one or more of the first mainstream grooves,
the first mainstream grooves each continuously extend from a first end to a second end along the first direction, and the first mainstream grooves are each intersected by the first communication grooves at a plurality of first intersections arranged at positions along the first direction in between the first end and the second end of the first mainstream grooves, the first mainstream grooves being in communication with the first communication grooves at the plurality of first intersections,
the second groove assembly includes a plurality of second mainstream grooves that extend in the first direction and a plurality of second communication grooves that extend in a direction different from the first direction and that communicate with one or more of the second mainstream grooves,
the second mainstream grooves each continuously extend from a first end to a second end along the first direction, and the second mainstream grooves are each intersected by the second communication grooves at a plurality of second intersections arranged at positions along the first direction in between the first end and the second end of the second mainstream grooves, the second mainstream grooves being in communication with the second communication grooves at the plurality of second intersections,
a flow channel cross-sectional area of a second mainstream groove of the plurality of second mainstream grooves is greater than a flow channel cross-sectional area of a first mainstream groove of the plurality of first mainstream grooves, and
a flow channel cross-sectional area of a second communication groove of the plurality of second communication grooves is greater than a flow channel cross-sectional area of a first communication groove of the plurality of first communication grooves.