Fractal micro-channel heat dissipation device for cooling high-power X-ray source

Abstract

The utility model discloses a fractal micro-channel heat dissipation device for cooling a high-power X-ray source, which comprises a shell and an end cover, the shell is positioned on the back of an X-ray source substrate, the end cover is used for covering the shell, and a cooling cavity for accommodating a cooling working medium is arranged inside the shell; the bottom of the shell is fixedly provided with a plurality of micro turbulent flow elements arranged in a dot matrix mode, and fractal micro-channels for cooling working media to flow are formed by gaps among the micro turbulent flow elements. The fractal micro-channel heat dissipation device provided by the utility model can break through the limitation of the traditional heat dissipation technology and improve the cooling performance of the target material. The long and straight fractal micro-channel ensures normal active flow of the cooling working medium, and the micro turbulent flow elements in the fractal micro-channel can form secondary flow or vortex so as to improve the heat dissipation efficiency. Flow of fluid in the micro-channel is disturbed, a flow boundary layer between liquid and solid is thinned, the convective heat transfer coefficient of a cooling working medium on the surface of the solid is increased, and therefore the effect of enhancing the heat transfer capacity is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of radiators, and in particular relates to a fractal microchannel heat sink for cooling a high-power X-ray source. Background Art

[0002] With the rapid advancement of science and technology, electronic devices are evolving towards smaller size, higher power, lighter weight (mass), and higher heat flux. Efficient and reliable cooling methods are being sought across various fields to address the challenges of extremely high heat loads due to weight and volume constraints. Thermal issues affecting the reliability and stability of electronic devices have become increasingly prominent, and electronic cooling has become a research hotspot. X-ray technology is a vital scientific tool, contributing significantly to the development of chemical engineering, metallurgy, steel, geology, materials science, and other disciplines in my country, and playing a key role in medical diagnosis, scientific research, and industrial testing. X-ray sources, as key devices for generating X-rays, generate significant heat during operation due to the prolonged electron beam bombardment of their anode targets, severely impacting the efficiency and quality of X-ray generation. Compared to conventional X-ray devices, the anode targets of high-power X-ray sources generate significantly more heat. Conventional flat-type water cooling technology for target heat dissipation is unable to meet the high heat dissipation requirements for stable operation of high-power X-ray sources, limiting the demand for advanced testing and applications. Therefore, the development of a novel cooling device for target heat dissipation in high-power X-ray sources has become an urgent task. Summary of the Invention

[0003] When an X-ray source is in operation for extended periods, the target material generates significant heat, severely impacting the stability of the equipment, the efficiency and quality of X-ray generation, and the accuracy of testing. This utility model addresses the issues of poor heat exchange efficiency and insufficient heat dissipation capacity inherent in existing flat-lay water cooling technologies for X-ray targets. By developing a fractal microchannel heat sink for high-power X-ray source cooling, it effectively addresses the high heat dissipation performance requirements of high-power X-ray sources during operation. This heat sink boasts a simple structure, ease of manufacture, high cost-effectiveness, and outstanding heat dissipation efficiency, promising broad application prospects in related scientific research and engineering technologies.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A fractal microchannel heat sink for cooling a high-power X-ray source includes a housing positioned on the back of the X-ray source base and an end cap for covering the housing. The housing has a cooling chamber for accommodating a cooling medium. A plurality of microfluidic elements arranged in a lattice are fixed to the bottom of the housing, with the lines containing two adjacent rows of microfluidic elements parallel to each other. The gaps between the microfluidic elements form fractal microchannels for the flow of the cooling medium. These fractal microchannels are long, straight microchannels that better ensure the active flow of the cooling medium, facilitate the normal outflow and circulation of the cooling medium, and increase heat dissipation efficiency. Compared to microchannels of other shapes, the flow velocity of the cooling medium in long, straight microchannels is relatively fast, improving heat exchange efficiency.

[0006] In a further embodiment, the micro-turbulators are rectangular in shape, with a square cross-section. The micro-turbulators have a height of 0.5 mm to 2 mm, a width of 0.5 mm to 2 mm, and a spacing of 0.5 mm to 2 mm between two adjacent micro-turbulators. The micro-turbulators are arranged at equal intervals. This shape and arrangement ensures the normal flow of the cooling medium while also better generating localized secondary flows or vortices between the turbulators to improve heat dissipation efficiency.

[0007] In a further embodiment, the end cover is provided with an inlet for the cooling medium to enter the cooling cavity and an outlet for the cooling medium to flow out of the cooling cavity. The material of the radiation source base is copper.

[0008] The utility model has the following beneficial effects:

[0009] Compared with the flat water cooling technology, the fractal microchannel heat sink provided by the present invention can break through the limitations of traditional heat dissipation technology and improve the cooling performance of the target material. The long straight microchannel ensures the normal active flow of the cooling medium, and the micro-turbulent elements inside it can also form secondary flows or vortices to improve the heat dissipation efficiency. By disturbing the flow of the fluid in the microchannel, the flow boundary layer between the liquid and the solid is thinned, and the convective heat transfer coefficient of the cooling medium on the solid surface is enhanced, thereby achieving the effect of enhancing the heat transfer capacity. The periodic fractal microchannel radiator designed by the present invention can be widely used in equipment related to high-power X-ray sources, showing great application potential and prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 The utility model provides a fractal microchannel heat sink for cooling a high-power X-ray source.

[0011] Reference numerals: 1 - X-ray source, 2 - housing, 3 - end cover, 4 - cooling chamber, 5 - micro-turbulent element, 6 - inlet, 7 - outlet. DETAILED DESCRIPTION

[0012] The present invention will be further described below in conjunction with the embodiments and drawings so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0013] It should be noted that the term "fixed" in this invention means that two interconnected parts are fixed together, generally by welding, screws, or gluing. Those skilled in the art will understand the specific meaning of the above term in this invention based on specific circumstances.

[0014] refer to Figure 1 A fractal microchannel heat sink for cooling a high-power X-ray source comprises a housing 2 located on the back of an X-ray source 1 and an end cap 3 for covering the housing. The housing 1 has a cooling chamber 4 for accommodating a cooling medium. A plurality of micro-turbulators 5 arranged in a lattice are fixed to the bottom of the housing, with the lines along which adjacent rows of micro-turbulators lie parallel to each other. The micro-turbulators 5 are rectangular parallelepipeds. In a preferred embodiment, the cross-section of the rectangular parallelepipeds is square. The micro-turbulators have a height of 0.5 mm to 2 mm and a width of 0.5 mm to 2 mm. The spacing between adjacent micro-turbulators is 0.5 mm to 2 mm, and the micro-turbulators are arranged at equal intervals. The gaps between the micro-turbulators form fractal microchannels for the flow of the cooling medium. The fractal microchannels are long, straight microchannels. Furthermore, the end cap 3 is provided with an inlet 6 for the cooling medium to enter the cooling chamber and an outlet 7 for the cooling medium to exit the cooling chamber. The X-ray source base is made of copper.

[0015] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

Claims

1. A fractal microchannel heat sink for cooling a high-power X-ray source, characterized by: The invention comprises a shell located on the back of the X-ray source base and an end cover for covering the shell. The interior of the shell has a cooling cavity for accommodating a cooling medium. The bottom of the shell is fixed with a plurality of micro-turbulent elements arranged in a lattice. The gaps between the micro-turbulent elements form fractal microchannels for the flow of the cooling medium.

2. The fractal microchannel heat sink for high-power X-ray source cooling according to claim 1, characterized in that: The micro-turbulent element is in the shape of a cuboid.

3. The fractal microchannel heat sink for high-power X-ray source cooling according to claim 2, characterized in that: The height of the micro-turbulator is 0.5mm-2mm, the width is 0.5mm-2mm, and the interval between two adjacent micro-turbulators is 0.5mm-2mm.

4. The fractal microchannel heat sink for high-power X-ray source cooling according to claim 1, characterized in that: The micro-turbulent elements are arranged at equal intervals, and the straight lines where the micro-turbulent elements in two adjacent rows are located are parallel to each other.

5. The fractal microchannel heat sink for high-power X-ray source cooling according to any one of claims 1 to 4, characterized in that: The end cover is provided with an inlet for the cooling medium to enter the cooling cavity and an outlet for the cooling medium to flow out of the cooling cavity.

6. The fractal microchannel heat sink for high-power X-ray source cooling according to any one of claims 1 to 4, characterized in that: The material of the ray source substrate is copper.

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