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Arrangement in a liquid cooler

  • US 9,022,101 B2
  • Filed: 11/18/2010
  • Issued: 05/05/2015
  • Est. Priority Date: 12/18/2009
  • Status: Active Grant
First Claim
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1. An arrangement for circulating liquid in a liquid cooler for power electronics appliances, inside the cooler at least two longitudinal main ducts being arranged and transverse ducts arranged between the two longitudinal main ducts and connecting the two longitudinal main ducts, and in the cooler one of the longitudinal ducts being an input duct, into which liquid from outside is led via an input joint and the other one the longitudinal ducts being an output duct, from where the liquid is led out via an output joint,whereina tubular additional part having an open end at least on the side of the output joint is installed inside the output duct, andthe additional part is arranged detached from the output duct such that a gap remains between the outer surface of the additional part and the inner surface of the output duct for enabling a liquid flow in the output duct outside the additional part,in the arrangement a first aperture or first apertures are arranged in the part of the additional part on the output joint side between the output joint and a center level of the closest transverse duct to the output joint in the liquid cooler for enabling a first path of passage for a part of the nominal total flow into the additional part and via the additional part onwards to the output joint, wherein the first aperture or first apertures directly face the gap remaining between the outer surface of the additional part and the inner surface of the output duct,a second aperture or second apertures are arranged in the part of the additional part that is farthest from the output joint or between the additional part and the output duct for enabling a second path of passage for the remaining part of the total flow into the additional part and via the additional part onwards to the output joint,the liquid in the output duct is divided to flow through the first path of passage into the additional part and flow through the second path of passage into the additional part, and all of the liquid led out of the output joint comes from the liquid flowing through the first path of passage into the additional part and the liquid flowing through the second path of passage into the additional part, andthe additional part is entirely detached from the output duct such that the gap remains between the entire outer surface of the additional part and the entire inner surface of the output duct.

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