Fluidic pump for heat management
First Claim
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1. An apparatus, comprising:
- an electronically operated device;
a fluid filled conduit, thermally in contact with at least a portion of said heat producing device, and includes a fluid therein;
a pump, of a type that pumps said fluid through the conduit, but does not extend through any outer walls of the conduit to the inside of the conduit; and
wherein said fluid filled conduit includes a first portion forming said thermally contact, and includes a second portion which releases heat, wherein said conduit is formed of a plurality of mechanical segments having different fluidic characteristics, and said pump is an impedance pump that causes fluid to flow based on fluidic impedance differences between different mechanical segments of the conduit, and which includes an actuator that reduces an internal area of at least one area of the conduit to cause said fluid to flow,and further comprising a controller which controls said actuator to a resonance point of the system that creates a maximum pumping effect.
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Abstract
A heat producing device is placed in contact with a heat exchanger that is fluidically coupled to a fluid pump. The fluid pump operates to pumps fluid through a closed fluidic system between the heat exchanger and a spot where the heat can be dissipated. In an aspect, an actuator forces fluid to be pumped without passing through a wall of the pump. One aspect uses an impedance pump as the pumping element.
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Citations
15 Claims
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1. An apparatus, comprising:
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an electronically operated device;
a fluid filled conduit, thermally in contact with at least a portion of said heat producing device, and includes a fluid therein;a pump, of a type that pumps said fluid through the conduit, but does not extend through any outer walls of the conduit to the inside of the conduit; and wherein said fluid filled conduit includes a first portion forming said thermally contact, and includes a second portion which releases heat, wherein said conduit is formed of a plurality of mechanical segments having different fluidic characteristics, and said pump is an impedance pump that causes fluid to flow based on fluidic impedance differences between different mechanical segments of the conduit, and which includes an actuator that reduces an internal area of at least one area of the conduit to cause said fluid to flow, and further comprising a controller which controls said actuator to a resonance point of the system that creates a maximum pumping effect. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus, comprising:
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a chip formed of a substrate with at least one electronically operated device thereon; a fluid filled conduit, also formed on said chip, and having a first portion which is thermally in contact with at least one portion of said electronically operated device, and at least another portion forming a heat releasing portion; and a pumping part, operating to pump fluid in the chip without having any portion extending inside walls of said fluid filled conduit, wherein said conduit is formed of a plurality of mechanical segments having different fluidic characteristics, and said pumping part includes an impedance based pump that causes fluid to be pumped based on fluidic impedance differences between different mechanical segments forming the conduit, wherein said impedance pump further includes an actuator that causes a pressure increase in at least one area of at least one of said mechanical segments; and a controller, that controls a characteristic of said actuator, to change a characteristic of pumping, wherein said controller controls said actuaotor to operate said pumping part intermittently and in bursts. - View Dependent Claims (10, 14)
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11. A method, comprising:
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forming a fluid filled conduit having at least one portion in contact with a heat producing device; pumping fluid through the conduit without using any part that extends inside walls of the conduit, to draw heat from said at least one portion, and to pump said heat to at least a second portion; and cooling said fluid at said second portion, wherein said pumping comprises using a conduit having a plurality of mechanical segments with different fluidic characteristics, actuating at least one of said mechanical segments to cause fluid to flow between the different mechanical segments based on said different fluidic characteristics; and controlling said actuating to a resonant point of the system that produces a maximum pumping effect. - View Dependent Claims (12, 13, 15)
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Specification