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Heatsink with integrated desiccant

IP.com Disclosure Number: IPCOM000200976D
Publication Date: 2010-Nov-02
Document File: 2 page(s) / 159K

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The IP.com Prior Art Database


Disclosed is a novel use of a desiccant inside a point of sale (POS) system to absorb any moisture collected when the system is powered-off. A desiccant material mounted to an internal system heatsink reduces the risk of damage to the system due to moisture accumulation and condensation.

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Heatsink with integrated desiccant

When point-of-sale (POS) systems are used outdoors (i.e., garden centers, alfresco food service, beach side bars), the system runs the risk of accumulating moisture/condensation on the inside when the system is turned off or put into a sleep mode. If there is auxiliary power available to the system boards or when the system is powered on, electrical shorts may occur and damage the electronics.

The solution is a method to reduce the risk of damage to system boards due to moisture and condensation. This disclosure proposes a novel use of a desiccant inside a POS system to absorb any moisture collected when the system is powered-off.

"A desiccant is a hygroscopic substance that induces or sustains a state of dryness ( desiccation) in its local vicinity in a moderately well-sealed container." [1] The core idea of this invention is to mount a desiccant material to an internal system heatsink (i.e., central processing unit (CPU) and/or memory/video controller). Desiccants can take the shape of rings, cups, ferrules, bushings, sleeves, and more to act as a mechanical component of the heatsink.

When the system is off and is inactive overnight, the internal system temperature can drop below the dew point causing condensation to accumulate on/in the system. A desiccant absorbs any excess moisture and protects the system's internal electronics. When an operator powers-on the system, the system/heatsink begins to generate heat. The heatsin...