Composite phase change heat sink with micro-groove group

Abstract

The invention discloses a microgroove group composite phase change radiator. The radiator comprises a radiating surface and a condensing surface which are opposite to each other, wherein the radiating surface is connected with the condensing surface by a side surrounding plate to form a closed inner cavity, and a plurality of conveying pipelines for connecting the radiating surface with the condensing surface are arranged in the inner cavity; a microgroove group structure consisting of a plurality of microgrooves on micro level is arranged on the radiating surface in the inner cavity and used for accommodating a heat removal medium; a porous core material is filled in gaps between the conveying pipelines in the inner cavity; and a plurality of gaps are formed at one end of each conveying pipeline, which is in contact with the condensing surface, and the liquefied heat removal medium capable of being accommodated on the condensing surface flows out of the conveying pipelines and enters the porous core material. The radiator has heat superconducting capacity, and the heat of a power electronic equipment chip can be timely transferred to the radiating fin part by the microgroove group composite phase change technology; and the radiator is strong in cooling capacity, does not have cooling energy consumption, runs without power, saves energy, and is light in overall weight, small in size, stable in work, high in reliability, low in cost and environment-friendly.

Description

technical field [0001] The invention relates to a heat sink, in particular to a heat sink for power electronic equipment which combines heat taking and heat dissipation. Background technique [0002] Modern power electronic equipment is rapidly developing towards high integration, high density assembly, and high operating speed. As the core chip of power electronic equipment, its operating frequency is getting faster and faster, it consumes more and more power, and emits more and more heat. If the heat dissipation capability of the device is not strong, the power dissipation will cause the temperature of the active area of ​​the chip inside the device to rise and the junction temperature to rise. The failure rate of components is exponentially related to its junction temperature, and the performance decreases with the increase of junction temperature. For every 10°C increase in the operating temperature of the device, the failure rate doubles. [0003] At present, the hea...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned existing radiators, and provide a micro-groove group composite phase-change radiator that combines heat extraction and heat dissipation, which solves the common problems of uneven heat dissipation and heat dissipation in existing radiators. Problems of low efficiency and short lifetime of power electronics

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