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Flat-Pack Blower Carrier for Enterprise Server

IP.com Disclosure Number: IPCOM000248031D
Publication Date: 2016-Oct-19
Document File: 3 page(s) / 234K

Publishing Venue

The IP.com Prior Art Database

Abstract

The disclosed describes a methodology of enabling use of flat-pack blowers in a stacked arrangement and the design of carrier to maximize airflow.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 51% of the total text.

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Flat-Pack Blower Carrier for Enterprise Server

A fan is a mechanical device that is used to create a continuous flow of gas such as air. It is a common staple in the cooling of electronics, which use air as the working fluid; the fan is a compulsory unit which creates the flow of air through the system. They can be a simple as a single rotor airmover or complex as a counter-rotating dual rotor axil fan and typically range in size from 40mm2 up to 120mm2. The latter is often capable of producing an higher pressure head for a given flow rate and has a inherent redundant mode if one of the rotors were to fail. The counter-rotating dual rotor axil fan was quickly adapted by the electronic server industry to cool systems which used ever more power and thus harder to cool. It has been common place to just speed up the fans and propel additional airflow through the system. The cost of doing so results in higher power consumption, louder systems, and additional data center airflow delivery.

One of the alternatives to increasing airflow through a system to provide adequate cooling can be by increasing the cooling effectiveness of the heat sinks employed and the use of plenums and duct works. However, changing how the airflow travels through a system often increases the pressure required to push the airflow through the box. It used to hold true that when higher pressure was required blowers were used instead of fans until the adaptation of counter-rotating fans which were able to produce just as much airflow and pressure as blowers of the same size and power. The latest system designs are increasing in both power density and mechanical volume limitations which raises thermal cooling requirements and challenges. For a new class of enterprise servers, the design deviated from common system layout where either push- or pull- fans were located in favor of additional components. The resulting space still unoccupied and reserved for airmovers did not allow for the height and placement of the counter-rotating dual rotor axil fan previously used in legacy systems. The flat-pack 92mm2 blowers were an option if the limited airflow and would require the other airmovers in the system to compensate for the loss of airflow if the blower were to fail. With the blower being the best option for the new enterprise servers, a new carrier in which it is packaged into needed to be specifically designed. In earlier designs as shown in Figure 1, the blowers were arranged in a stacked formation with the intake hubs facing each other; the top blower was inverted and a 20mm plenum in-between allowing adequate intake airflow. With no side to side airflow required, the carrier was just a flat bezel with pull features on the left and right sides to remove the blower. No cam latch was

incorporated, No components reside...