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Refrigerant phase change cold plate

A refrigerant and cold plate technology, applied in electrical components, electrical solid devices, circuits, etc., can solve the problems of unstable flow and low heat exchange performance, improve distribution, improve uniformity and stability, and reduce flow resistance. Effect

Active Publication Date: 2019-04-23
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In view of this, the object of the present invention is to provide a refrigerant phase change cold plate to solve the technical problems of the distribution of the two-phase flow in the channel of the existing cold plate and the unstable flow in different directions, and the low heat transfer performance

Method used

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  • Refrigerant phase change cold plate
  • Refrigerant phase change cold plate

Examples

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Embodiment 1

[0047] as attached figure 1 and 3 As shown, a specific embodiment of a refrigerant phase change cold plate is used to dissipate heat for the heating element 7 disposed thereon, including:

[0048] The cold plate substrate 1 is arranged with an inlet mixing chamber 2, an outlet mixing chamber 3, and a flow channel 10 for connecting the inlet mixing chamber 2 and the outlet mixing chamber 3; 10 is a closed cover plate 6, and the heating element 7 is arranged on the cover plate 6, or on the bottom of the cold plate substrate 1, or arranged on both sides of the cover plate 6 and the bottom of the cold plate substrate 1. Its manufacturing process is as follows: mill out runner 10 on the cold plate substrate 1 made of aluminum (attachment image 3 Not shown in ) and an inlet mixing chamber 2 and an outlet mixing chamber 3, and an inlet 4 and an outlet 5 are provided. An aluminum cover plate 6 is placed on the flow channel 10, and the gap between the cover plate 6 and the flow cha...

Embodiment 2

[0056] as attached figure 2 and 3 As shown, another specific embodiment of the refrigerant phase change cold plate is used to dissipate heat for the heating element 7 disposed thereon, including:

[0057] The cold plate substrate 1 is arranged with an inlet mixing chamber 2, an outlet mixing chamber 3, and a flow channel 10 for connecting the inlet mixing chamber 2 and the outlet mixing chamber 3; 10 is a closed cover plate 6, and the heating element 7 is arranged on the cover plate 6, or on the bottom of the cold plate substrate 1, or arranged on both sides of the cover plate 6 and the bottom of the cold plate substrate 1.

[0058] The flow channel 10 includes a forward flow channel A and a reverse flow channel B which communicate with each other. The forward flow channel A and the reverse flow channel B are connected through a bend 13. The refrigerant enters from the inlet mixing chamber 2 and passes through more than one level of positive flow channel. After going to the f...

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Abstract

The invention discloses a refrigerant phase change cold plate. The refrigerant phase change cold plate comprises: a cold plate substrate provided with an inlet mixing chamber, an outlet mixing chamberand a channel communicating with the inlet mixing chamber and the outlet mixing chamber; a cover plate arranged on the cold plate substrate and configured to seal the channel; and a heating element arranged on the cover plate and / or the cold plate substrate. The channel comprises a forward channel and a reverse channel which communicate with each other, a curved channel communicates between the forward channel and the reverse channel, the refrigerant enters the inlet mixing chamber, passes through a more than one level of the forward channel e and a more than one level of reverse channel andflows out of the outlet mixing chamber. The forward channel and the reverse channel both comprise a sudden contraction channel and an expansion channel which communicate with each other, and the refrigerant generates once hydrodynamic cavitation process at intervals in the channel when passing through the sudden contraction channel and the expansion channel each time. The refrigerant phase changecold plate can solve the technical problems that a current cold plate channels are unstable in two-phase flow-type distribution and flow in different directions and the heat exchange performance is not high.

Description

technical field [0001] The invention relates to the technical field of heat dissipation of power electronic devices, in particular to a refrigerant phase change cold plate based on hydraulic cavitation effect or gas-liquid separation effect. Background technique [0002] In the heat dissipation technology of high-power power electronic devices, flow boiling is one of the forms with the highest heat transfer coefficient. In the existing heat sinks of high-power power electronic devices, the refrigerant phase change cold plate using flow boiling technology has higher efficiency. The heat transfer performance of flow boiling is closely related to the distribution and flow characteristics of the gas-liquid two-phase. For example, when the dryness is high, the heat transfer surface is covered by the gas phase, which will lead to heat transfer deterioration. Refrigerant phase change cold plates based on this technology often adopt a single serpentine flow channel arrangement, with...

Claims

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Application Information

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IPC IPC(8): H01L23/427
CPCH01L23/427
Inventor 冯钊赞姚磊胡家喜邓文川王春燕李诗怀郭宗坤何凯曾云峰王雄
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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