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Arrangement for delivering fluids

Arrangement for delivering fluids description/claims

This application is a section 371 of PCT/EP05/08668, filed 10 Aug. 2005 and published 13 Apr. 2006 as WO 2006-37396-A.

The invention relates to an arrangement for pumping fluids. As fluids, liquid and/or gaseous media can be pumped.

In computers, components having high heat flux densities (e.g. 60 W/cm2) are in use today. The heat from these components must first be transferred into a liquid circulation system, and from that circulation system the heat must be discharged to the ambient air via a liquid/air heat exchanger.

Dissipation of heat from components having a high heat flux density is accomplished by means of so-called heat absorbers or cold plates. In these, heat is transferred to a cooling liquid, and the latter is usually caused to circulate in a circulation system.

In this context, the cooling liquid flows not only through the heat absorber but also through a liquid pump that produces the forced circulation and produces an appropriate pressure buildup and appropriate volumetric flow through the heat absorber and an associated heat exchanger, so that the heat transfer coefficients relevant to these heat-transfer elements become large and the temperature gradients necessary for heat transfer become small.

A fan is usually arranged near the heat exchanger, which fan produces, on the air side of the heat exchanger, a forced convection of the cooling air as well as good transfer coefficients.

In cooling arrangements of this kind, the fan and the liquid pump are driven separately, and these components are also often physically separate from one another. Two drives are therefore required, which in most cases operate rotationally. These drives require energy and also a fairly large installation space, both of which are undesirable.

It is therefore an object of the invention to make available a novel arrangement for delivering fluids.

According to the invention, this object is achieved by using soft ferromagnetic flux conductors to assist in magnetically coupling an electric motor to a pump rotor across a partitioning can which separates them.

A very compact arrangement with good efficiency is thereby obtained, in which context the soft ferromagnetic magnetic flux conductors bridge the space between the partitioning can and the second permanent magnet and thereby make possible a greater distance between the first permanent magnet and second permanent magnet of the magnetic coupling.

Further details and advantageous refinements of the invention will be evident from the exemplifying embodiments, in no way to be understood as a limitation of the invention, that are described below and depicted in the drawings.

FIG. 1 is a longitudinal section through a preferred embodiment of the invention, looking along line I-I of FIG. 5;

FIGS. 2 and 3 are exploded views of the arrangement according to FIG. 1;

FIG. 4 is a schematic view to explain the invention;

FIG. 5 is a section looking along line V-V of FIG. 1;

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