Browse Prior Art Database

Front Mounted redundant cooling fan assembly

IP.com Disclosure Number: IPCOM000028744D
Original Publication Date: 2004-May-28
Included in the Prior Art Database: 2004-May-28
Document File: 4 page(s) / 1M

Publishing Venue

IBM

Abstract

To reduce down time it is desirable to be able to hot-swap computer system cooling fans and in a Midplane based system it is necessary that this can be done from the front or rear of the system only. Space at the rear of the system is restricted due to the amount of I/O and power cabling so it may be desirable to mount the cooling fans at the front of the system. This invention provides a compact solution to this problem

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Page 1 of 4

Front Mounted redundant cooling fan assembly

     Two fans are mounted together in tandem, with a grill and latch mechanism at the front and a blind mating connector at the rear. This assembly is slid into a rectangular opening in the front of the system and connects with a matching connector mounted at the rear of the opening.

In Fig 1 it can be seen how the two fans are mounted one behind the other and that a front bezel assembly that has a

conventional Handle and latch and that the end of a lightpipe can been seen in one corner. EMC issues are handled

by using a metal grill in combination with a EMC shield with spring fingers around the periphery. A spacer is added

between the fans to reduce the acoustic affects of two closely coupled fans.

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Page 2 of 4

In fig 2 the rear of the assembly can be seen with the three long screws and the lightpipe connecting all the major parts together. A blind mating connector is mounted at the rear so that all the power and signal requirements of the two fans can be met. Short tubular sections of a resilient material are mounted on the shafts of the screws and the lightpipe and these are dimensioned so that they reduce any transmission of any vibration and noise from the assembly to the rest of the system. The lightpipe is used to transmit a fan status signal from the processor board to the front of the fan assembly so that it can be seen from the front of the system.

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