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Adjustable Airflow Bypass Control Device

IP.com Disclosure Number: IPCOM000010680D
Publication Date: 2003-Jan-08
Document File: 5 page(s) / 481K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method that controls the airflow between multiple objects. Benefits include uniform airflow of varying degrees between dense and less dense regions that need cooling.

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Adjustable Airflow Bypass Control Device

Disclosed is a method that controls the airflow between multiple objects. Benefits include

uniform airflow of varying degrees between dense and less dense regions that need cooling.

Background

Currently the airflow between multiple objects is performed in two ways:

 

  1. Foam or solid material blocks are placed around the heat sinks to direct the airflow through the heat sink. This method is effective; however, it limits the cooling of other components directly behind the foam or blocks. See Figure 4.

 

  1. Plastic ducts or manifolds are used to direct airflow over a heat sink; however,  complexities exist when multiple heat sinks are used, which block or insufficiently cool the desired objects.

General Description

The disclosed method allows for the tailoring (i.e. tuning or adjusting) of uniform air flow over dense and less dense regions in order to improve overall cooling.  Figure 1 shows the invention and explains how the airflow can be controlled by adjusting the louvers in the device. The disclosed method contains two examples for controlling the amount of airflow that bypasses dense regions in favor of less dense regions: 

 

  • Example 1: Figure 2 shows two heat sinks placed side-by-side. The coolant air is provided at relatively high airflows (i.e. 10 CFM +).  Since the air takes the path of least resistance, a majority of the airflow will flow around the heat sink and not through the fins of the heat sink. The pressure rise through the heat sink fins is typically larger than through the gaps around the heat sink and duct. Therefore, less coolant air flows through the heat sink finned area and the overall therma...