CN-121985829-A - Embedded hydrogel needle rib self-adaptive double-layer micro-channel radiator

CN121985829ACN 121985829 ACN121985829 ACN 121985829ACN-121985829-A

Abstract

The invention discloses an embedded hydrogel pin-ribbed self-adaptive double-layer micro-channel radiator which consists of a basic radiating module at the bottom, a self-adaptive flow control module at the middle and an auxiliary radiating module at the top, wherein a first layer of micro-channel is formed between the bottom and the middle, and a second layer of micro-channel is formed between the middle and the top. The basic heat dissipation module is internally provided with a mixed needle rib group and an elliptic needle rib group, wherein the mixed needle rib group is embedded with rectangular self-adaptive needle ribs made of temperature sensitive hydrogel materials, and the self-adaptive flow control module is provided with a plurality of groups of rectangular shunt ports corresponding to the self-adaptive needle ribs one by one. In the initial state, the self-adaptive pin rib seals the split-flow port, the double-layer micro-channels independently and parallelly dissipate heat, and when local hot spots exist, the self-adaptive pin rib is heated and contracted to open the split-flow port, and the working medium of the auxiliary heat dissipation module is converged into the hot spot area to strengthen cooling. The invention realizes dynamic self-adaptive cooling, can intelligently regulate and control local cooling intensity, and effectively solves the problems of local overheating and uneven temperature distribution under uneven heat load.

Inventors

HE YURONG
LIANG YIXIN
TANG TIANQI
Chen Junni
ZHANG BORUI

Assignees

哈尔滨工业大学

Dates

Publication Date: 20260505
Application Date: 20260123

Claims (7)

1. The self-adaptive double-layer microchannel radiator with the embedded hydrogel needle ribs is characterized by comprising a basic radiating module (1) at the bottom of the radiator, a self-adaptive flow control module (2) at the middle of the radiator and an auxiliary radiating module (3) at the top of the radiator, wherein a mixed needle rib group and an elliptic needle rib (10) are formed by a regular pentahedron needle rib (4), a large hexahedral needle rib (7), a reverse pentahedron needle rib (8) and a small hexahedral needle rib (9) are arranged in the basic radiating module (1), the bottom, the middle and the top of the self-adaptive double-layer microchannel radiator are connected through a plurality of elliptic needle ribs (10), and the self-adaptive flow control module (2) acts as a flow channel partition plate to divide the radiator into a first layer microchannel at the lower layer and a second layer microchannel at the upper layer; the mixed pin rib groups and the elliptic pin ribs (10) in the basic heat dissipation module (1) are transversely alternately arranged at intervals, and a runner is formed between any two adjacent pin rib groups to form a first layer of micro-channel; a runner is formed between any two adjacent elliptic needle ribs (10) in the auxiliary heat radiation module (3) to form a second layer of micro-channel; One end of the first layer of micro-channel is a first layer of micro-channel inlet (13), the other end of the first layer of micro-channel is a first layer of micro-channel outlet (14), one end of the second layer of micro-channel is a second layer of micro-channel outlet (15), and the other end of the second layer of micro-channel is a second layer of micro-channel inlet (16); The self-adaptive flow control module (2) is provided with a plurality of groups of rectangular shunt ports A (5) and rectangular shunt ports B (11) which are longitudinally and sequentially arranged at intervals, and a rectangular self-adaptive needle rib (6) made of a temperature-sensitive hydrogel material is positioned right below the rectangular shunt ports A (5) and the rectangular shunt ports B (11) in the mixed needle rib group; After the temperature of the temperature-sensitive hydrogel is sensed to exceed the critical transition temperature, the temperature-sensitive hydrogel undergoes volume phase change, and is converted from a swelling state to a shrinkage state, the height of the rectangular self-adaptive needle rib (6) is reduced, and the rectangular self-adaptive needle rib (12) is deformed after deformation.
2. The embedded hydrogel pin-ribbed adaptive double-layer microchannel heat sink as claimed in claim 1, wherein the layout of the elliptical pin ribs (10) in the auxiliary heat sink module (3) is identical to the corresponding area of the base heat sink module (1).
3. The embedded hydrogel pin-ribbed adaptive dual-layer microchannel heat sink of claim 1, wherein the second layer of microchannels are the same height as the first layer of microchannels.
4. The embedded hydrogel pin-ribbed self-adaptive double-layer microchannel radiator according to claim 1 is characterized in that each group of rectangular shunt ports A (5) and rectangular shunt ports B (11) in the auxiliary radiating module (3) are equal in number and correspond to the rectangular self-adaptive pin ribs (6) in position one by one, each rectangular shunt port A (5) and each rectangular shunt port B (11) are located right above the corresponding rectangular self-adaptive pin rib (6), and geometric sizes of the rectangular shunt ports A (5) and the rectangular shunt ports B (11) in the length and width directions are slightly smaller than corresponding sizes of top surfaces of the rectangular self-adaptive pin ribs (6) in a fully-swelled state right below.
5. The embedded hydrogel pin-ribbed self-adaptive double-layer microchannel radiator according to claim 1 is characterized in that symmetrical rectangular cavities are processed in the regular pentahedron pin rib (4), the large hexahedral pin rib (7), the inverse pentahedron pin rib (8) and the small hexahedral pin rib (9) in the basic radiating module (1), and the geometric dimensions of the rectangular cavities in the length and width directions are the same as the corresponding dimensions of the rectangular self-adaptive pin rib (6) in a fully-swelled state.
6. The embedded hydrogel pin-ribbed self-adaptive double-layer microchannel radiator according to claim 1, wherein the rectangular self-adaptive pin-ribbed (6) is fixed in a rectangular cavity of the mixed pin-ribbed, the lower end of the rectangular self-adaptive pin-ribbed (6) is combined with a basic radiating module (1) at the bottom of the radiator, the upper end of the rectangular self-adaptive pin-ribbed is slightly higher than the top plane of the mixed pin-ribbed group in an initial state, the upper surface of the rectangular self-adaptive pin-ribbed is in contact with the lower surface of the self-adaptive flow control module (2) at the middle part of the radiator, and a rectangular shunt opening A (5) and a rectangular shunt opening B (11) on the self-adaptive flow control module (2) at the middle part of the radiator are tightly blocked.
7. The embedded hydrogel pin-ribbed self-adaptive double-layer microchannel radiator according to claim 1, wherein a gap exists between the top of the deformed rectangular self-adaptive pin-ribbed (12) and the rectangular shunt opening A (5) and the rectangular shunt opening B (11) of the self-adaptive flow control module (2) in the middle of the radiator, and cooling working medium in the second layer microchannel is converged into the first layer microchannel along the rectangular shunt opening A (5) and the rectangular shunt opening B (11).

Description

Embedded hydrogel needle rib self-adaptive double-layer micro-channel radiator Technical Field The invention relates to the technical field of microchannel heat dissipation, in particular to an embedded hydrogel self-adaptive pin-ribbed self-adaptive double-layer microchannel heat radiator. Background The chip structure evolves from two-dimensional plane assembly to three-dimensional stacking, and the heat flux density distribution of the chip is more concentrated while the density of the transistor is improved. The local hot spot not only causes abrupt temperature rise, but also affects adjacent units through the heat conduction effect of the silicon substrate, thereby forming vicious circle of heat accumulation-temperature unevenness, and severely restricting the long-term reliability and service life of the high-performance electronic equipment. The traditional uniform flow channel structure lacks response capability to dynamic heat load, is difficult to adapt to migration characteristics of hot spots in time and space dimensions, and causes a significant temperature gradient between a high-temperature area and a low-temperature background area, so that thermal stress and structural deformation risks are induced. If the flow channel strengthening design is simply performed according to the preset hot spot position, excessive cooling in the non-hot spot area is easily caused, and unnecessary pumping loss is caused. The existing improvement scheme focuses on the optimization of static structures such as non-uniform channels, local pin rib arrays and the like so as to strengthen the heat dissipation performance of a specific area. Such structures cannot be adjusted once they are finished, and lack real-time response capability to dynamic changes in the location of hot spots. Although the existing intelligent heat dissipation structure based on the hydrogel can realize a certain temperature response function, the existing intelligent heat dissipation structure based on the hydrogel still has obvious defects that when a hot spot is migrated to a region where the hydrogel is not arranged or has response lag, a system cannot timely adjust flow field distribution to strengthen heat dissipation of a new hot spot, and if the arrangement range of the hydrogel is enlarged for covering all potential hot spot regions, additional heat resistance is introduced due to poor inherent heat conduction performance. Disclosure of Invention In order to solve the defects of the prior art, the invention provides the embedded hydrogel needle rib self-adaptive double-layer microchannel radiator, which is characterized in that temperature-sensitive hydrogel materials are arranged at reasonable positions, and fluid flow is controlled according to local temperature conditions by utilizing intelligent responsiveness and adjustable phase change behaviors of the temperature-sensitive hydrogel materials, so that the problems of local overheating and uneven temperature distribution are solved. The technical scheme of the invention is as follows: The utility model provides an embedded double-deck microchannel radiator of hydrogel needle rib self-adaptation, basic heat dissipation module including the radiator bottom, the self-adaptation flow control module at radiator middle part and the auxiliary heat dissipation module at radiator top, be equipped with regular pentahedron needle rib in basic heat dissipation module, the big hexahedron needle rib, anti-pentahedron needle rib and little hexahedron needle rib constitute and mix needle rib group and oval needle rib group, the self-adaptation flow control module at radiator middle part is equipped with multiunit oval needle rib in the auxiliary heat dissipation module at radiator top as runner baffle effect separates the radiator into the first layer microchannel of lower floor and the second floor microchannel of upper strata. One end of the first layer of micro-channel is a first layer outlet, the other end of the first layer of micro-channel is a first layer inlet, one end of the second layer of micro-channel is a second layer outlet, the other end of the second layer of micro-channel is a second layer inlet, the second layer inlet is positioned at the top of the first layer outlet, and the second layer outlet is positioned at the top of the first layer inlet. The pentahedron, hexahedron and oval needle rib are columnar structures made of high heat conduction materials, the cross sections of the pentahedron, the hexagon and the oval are respectively pentagonal, the needle rib is vertically arranged, the lower end of the needle rib and a basic heat dissipation module at the bottom of the radiator are fixed into a whole, and any two adjacent rib sheets in the same group are symmetrically arranged. Further, a plurality of mixed pin rib groups and elliptical pin rib groups are arranged in the basic heat dissipation module, the mixed pin rib groups and the elliptical pin rib groups are transvers