A cooling fan includes a fan housing (30) having a central tube (34) extending upwardly thereof, a bearing (60) received in the central tube, a stator (20) mounted around the central tube, a rotor (10) including a hub (12) having a shaft (18) extending from the hub into the bearing, and a oil retaining ring (40) mounted around the shaft. A slot (180) is defined in a top end (182) of the shaft of the rotor near the hub to prevent the escaping oil from continuously creeping out along the shaft. Th...

A cooling fan has a metal spacer, a boss made of Nylon integrally formed with the spacer by an insert molding and seven blades extending outward therefrom. A skew angle of about 30 degrees is provided at a connecting portion or a base end portion of the blade to the boss so as to be inclined backward in relation to a rotating direction of the cooling fan. To the contrary, a skew angle of about 8 degrees is provided at a portion extending from the connecting portion to the leading end of the blad...

A method and apparatus for cooling an electronic application having at least one heat-generating electronic component mounted on a circuit board. A heat transferring heat sink is attached to the circuit board in thermal contact with one heat generating electronic component by first being statically fixed to the circuit board in a stationary position at a specified height above the circuit board, and then by resiliently biasing the component against the heat sink.

Cooling jets 1 are provided with a longitudinal aspect 2 greater than width 3. Thus, the coolant flow through the jet 1 is less susceptible to deflection by lateral or cross flows presented to that coolant flow such that cooling by impingement of the coolant flow upon a surface 7 to be cooled is improved. Typically, a plurality of jets 1 are provided in a housing wall 8. These jets 1 will be arranged in an appropriate pattern to achieve cooling by flow impingement upon the surface 7 to be cooled...

A cooling device for dissipating heat generated by an electronic element includes a fixing seat, a cooling body, and a vapor chamber. The fixing seat is arranged an opening. The cooling body includes a bottom plate attached onto the fixing seat and a plurality of cooling fins that are interspaced to each other and are attached to the bottom plate, in which a fixing hole is arranged at one side of the bottom plate, and an accommodating space is configured at the cooling fins in corresponding to t...

A cooling system includes a cold-accumulating refrigerator, and a cooling circuit. The cold-accumulating refrigerator includes a regenerator. The cooling circuit includes a main circuit, and a branched circuit. The main circuit includes a counterflow heat exchanger. The branched circuit is branched from an upstream portion of the main circuit, and joined to a downstream portion thereof, thereby reducing one of the flows of a refrigerant, flowing in a high-pressure-side passage and a low-pressure...

A method of producing a higher temperature cold and a lower temperature cold comprises the steps of generating a higher temperature cold and a lower temperature cold each including a compression of vapors of refrigerant condensation of the compressed vapors and subsequent expansion of the refrigerant with accompanying cooling, accumulating the generated colds, supplying the generated colds to corresponding consumers of higher temperature cold and lower temperature cold, and performing the genera...

A cooling system includes a cold-accumulating refrigerator, and a cooling circuit. The cold-accumulating refrigerator includes a cold accumulator. The cooling circuit includes a heat exchanger. The heat exchanger is thermally brought into contact with a portion of the cold accumulator whose temperature is varied from a high temperature to a low temperature by a working medium flowing therein. Thus, it is possible to utilize cold produced by the working medium flowing in the cold accumulator in o...

Apparatus for cooling a tubular thin film of thermoplastic resin in a melted state is described. The apparatus is capable of cooling the thin film from both the inside and the outside thereof while setting its diameter by interposing the film between the mandrel and an external circular coolant storage tank. The mandrel has a cylindrical shape and is connected with the lower side of a circular-shaped extruding die wherein the film is extruded downward from a circular slit in the die. The mandrel...

The present invention relates to a cross flow type cooling tower with which it is possible to prevent the emission of white vapor in cold weather with certainty. In order to accomplish the above object, the cooling tower of the present invention comprises: a heat dissipation unit having filling plates arranged vertically and parallel with each other so as to form dry air passages and moist air passages therebetween, each of the dry air passages and the moist air passages having inner surfaces; w...