Patent ID: 9568257
Date: 2017-02-14
CPC Classifications: F28D,F28F,H01L,H05K

Claim:
1. A thermal transfer device comprising: a thermal transfer surface; and a passageway for conducting a thermal transfer fluid from an inlet to an outlet while the thermal transfer fluid passes in thermal contact with said thermal transfer surface; said passageway including first and second spiral passages and a connection channel connecting said first and second spiral passages to permit flow of said thermal transfer fluid from said first spiral passage to said second spiral passage; said first and second spiral passages bounded on an interior of the spirals thereof by respective first and second thermally conductive posts each having an end in thermally conductive contact with the thermal transfer surface and bounded on an exterior of the spirals thereof by a respective wall, the first and second spiral passages being bounded so that thermal transfer fluid is forced to flow along a length of the first and second spiral passages; said connection channel being bounded to define a closed flow path between the ends of the first and second thermally conductive posts such that thermal transfer fluid exiting the first spiral passage at the end of the first thermally conductive post is forced to flow through the connection channel and to enter the second spiral passage at the end of the second thermally conductive post, the connection channel being bounded on a top by the thermal transfer surface such that thermal transfer fluid in the connection channel contacts the thermal transfer surface; thereby forming a path for flow of said thermal transfer fluid from said inlet, through said passageway, along the length of said first spiral passage to the end of the first thermally conductive post and to said connection channel, then along said connection channel to said second spiral passage at the end of the second thermally conductive post, then along the length of said second spiral passage, and then to said outlet.