Patent ID: 11948860
Assignee: WELCON INC.
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC H  F | IPC F  H

Claim 0:
1. A multilayer heat sink that cools an object in contact with the heat sink by flowing a fluid from a fluid inlet to a fluid outlet, the heat sink comprising:
a heat-receiving layer having a top surface in contact with the object to receive heat;
a channel layer provided on a bottom surface of the heat-receiving layer, the channel layer including cooling micropaths extending and directing the fluid in a direction orthogonal to a stacking direction;
an orifice layer provided on a bottom surface of the channel layer, the orifice layer including:
jet orifices configured to jet the fluid into the cooling micropaths from a header layer; and
drain orifices configured to drain the fluid from the cooling micropaths toward the header layer;

the header layer provided on a bottom surface of the orifice layer, the header layer including:
a peripheral wall; and
a baffle provided in a region surrounded by the peripheral wall, the baffle being configured to separate the fluid inlet from the fluid outlet; and

a bottom layer provided on a bottom surface of the header layer, wherein
the baffle includes:
parallel plates disposed parallel to each other; and
end plates configured to alternately close an opening at an end and an opening at an opposite end of the parallel plates,

the orifice layer, the bottom layer, the baffle, and the peripheral wall define a supply channel to guide the fluid from the fluid inlet to the jet orifices and a drain channel to guide the fluid from the drain orifices to the fluid outlet,
the supply channel includes supply sub-channels flanked by the parallel plates, and an entrance channel connecting the fluid inlet with openings of the supply sub-channels,
the drain channel includes drain sub-channels flanked by the parallel plates, and an exit channel connecting the fluid outlet with openings of the drain sub-channels,
the entrance channel and the exit channel are provided at opposite positions,
the jet orifices are provided at positions overlapping the supply sub-channels when seen in the stacking direction, and are arranged in two lines for each supply sub-channel in an extension direction of the supply sub-channel,
the drain orifices are provided at positions overlapping the drain sub-channels when seen in the stacking direction, and are arranged in two lines for each drain sub-channel in an extension direction of the drain sub-channel, and
the cooling micropaths are configured to overlap the supply sub-channels and the drain sub-channels over the parallel plates when seen in the stacking direction to connect the jet orifices with the drain orifices.