Small-sized phase change device

Abstract

The utility model belongs to the field of heat dissipation of electronic components, and relates to a small-sized phase change device. Comprising an upper end cover, a cylinder and a lower end cover, and a boss connecting structure is designed, so that the pressure resistance and the heat transfer capacity of the whole cavity are improved. Meanwhile, the appearance of the device can be modified according to the installation requirements of the electronic equipment. The device is formed by welding three parts through electron beams, the structure is simple, machining is easy, and the welding yield is high. By utilizing the heat absorption or heat release characteristic of the phase change material, the working temperature requirements of different electronic components can be met, meanwhile, the mounting position requirements of continuous electronic components are also met, the temperature uniformity of multi-dimensional electronic components is realized, and the structure is good in welding manufacturability, high in welding yield, low in manufacturing cost and suitable for large-scale popularization and application. And the requirement of batch production and manufacturing can be met.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation of electronic components and relates to a small phase change device. Background Technology

[0002] Phase change material-based thermal management systems are a type of heat dissipation method used in electronic devices. This technology was first applied to the thermal management systems of aircraft. With the rapid development of the electronics industry, the heat flux density of electronic chips has increased significantly, leading to their widespread use in aircraft and providing a development opportunity for phase change thermal management systems. At that time, phase change thermal management systems utilized the high latent heat of phase change materials and the short-term operation characteristics of the equipment. The heat dissipated by the chip during operation was absorbed and stored as the latent heat of the phase change material. When the equipment was in standby mode, the phase change material released the heat flux, returning to its pre-melting solid state, thus acting as a thermal buffer and stabilizing the chip temperature within a suitable range, preventing equipment failure due to temperature conflicts and overheating. Utility Model Content

[0003] Utility Model Purpose

[0004] This utility model provides a small, easily processed phase change device. Utilizing the heat absorption or release characteristics of phase change materials, it can meet the working temperature requirements of different electronic components, as well as the installation position requirements of various electronic components. It achieves temperature uniformity of electronic components in multiple dimensions. The structure has good weldability, high welding yield, and low manufacturing cost, which can meet the requirements of mass production.

[0005] Technical solution

[0006] like Figure 1 As shown, this utility model adopts the following technical solution to solve the above problems: a small phase change cooling device, characterized in that it comprises an upper end cover 1, a cylinder 2, and a lower end cover 3; both the upper end cover 1 and the lower end cover 3 are provided with overlapping edges and round holes; the inner side of the middle part of the cylinder 2 is a hollow cross-shaped structure, with a long cylindrical groove on one side and a short cylindrical groove on the other side; a protrusion is provided in the long cylindrical groove, and the protrusion is welded to the round hole on the bottom surface of the upper end cover 1, and the upper end cover 1... The end cap 1 is circumferentially welded to the long cylindrical groove to form cavity A; the short cylindrical groove has a protrusion that is welded to a round hole on the bottom surface of the lower end cap 3, and the lower end cap 3 is circumferentially welded to the short cylindrical groove to form cavity B; the hollow part inside the cross-shaped structure is cavity C, and the upper end cap 1, the cylinder 2, and the lower end cap 3 are connected through the cavities A, B, and C; the upper end cap 1 has injection holes on its sides for injecting phase change material.

[0007] Furthermore, the width of the hollow cross-shaped cavity wall is 4.5mm.

[0008] Furthermore, the hollow cross-shaped structure has a cavity wall length of 180mm.

[0009] Furthermore, the outer surface of the cylinder 2 is provided with a recess for placing electronic equipment.

[0010] Furthermore, there are four circular holes, which are evenly distributed on the upper end cover 1 and the lower end cover 3, and the circular holes are φ25mm.

[0011] Furthermore, there are four protrusions, evenly distributed within the long cylindrical groove and the short cylindrical groove, respectively. Each protrusion is a cylinder with a diameter of 25mm and a height of 2mm.

[0012] Furthermore, the overlap has a height of 1mm and a width of 2mm.

[0013] The beneficial effects of this application are as follows:

[0014] This device features a boss connection structure, which increases the pressure resistance and heat transfer capacity of the entire cavity. Furthermore, its shape can be modified to meet the installation requirements of electronic equipment. The device is constructed from three parts welded together by electron beam, resulting in a simple structure, easy fabrication, and a high welding yield. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the product's internal cavity structure;

[0017] Figure 3 This is a cross-sectional view of the connection between cavities A and B;

[0018] Figure 4 This is a cross-sectional view of the welding between the cylinder and the upper and lower end caps.

[0019] Figure 5 This is a schematic diagram of the integral welding of the cylinder body and the upper end cover;

[0020] The icons are: 1-top cap, 2-cylinder body, 3-bottom cap. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions in the embodiments of this utility model will be described in more detail below with reference to the embodiments of this utility model. In the examples, the same or similar reference numerals denote the same or similar components or elements having the same or similar functions throughout. The described embodiments are some, but not all, embodiments of this utility model. The embodiments described below with reference to the embodiments are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. The embodiments of this utility model will be described in detail below with reference to their specific implementation.

[0022] like Figure 2 As shown, the core cylindrical part of the phase change device is machined from bar stock. The central cross-shaped hollow section is the space for storing phase change material and is machined using wire cutting. It is 4.5mm wide and 180mm long. The outer space of the cross-shaped section is used to install electronic components, which are tightly fitted to the outside of its ribs, serving to store energy, reduce peak loads, and regulate temperature.

[0023] like Figure 5 As shown, both the upper and lower end caps have four φ25 circular holes, with a 5mm wide overlap on one side. They are welded to the cylinder body using electron beam welding. The four circular holes are welded to the cylinder on the cylinder body, significantly enhancing the cavity's pressure resistance. After the device is assembled, the upper and lower end caps and the cylinder body are electron beam welded. After welding, the cylindrical welded areas of the end caps are machined. Figure 2 As shown, the upper cap has a φ4 filling hole for filling phase change paraffin wax, and is welded and sealed after filling.

[0024] In the aforementioned phase change device, the central cross section is a hollow structure, with its hollowed-out portion machined by wire cutting. The two hollow ends form a hollow structure by welding the upper and lower end caps to the cylinder body. For cylinder body 2, four φ2 through holes are first machined into the top of the cross shape using bar stock. Then, a cutting wire is passed through the holes to machine the cross-shaped outline. The cross-shaped hollow rectangle is 4.5mm wide and 90mm long. Four φ25 cylinders, 2mm high, are machined at both ends of the cylinder body. A 2mm wide electron beam welding overlap, 1mm high, is left around the cylinders for welding to the upper end cap 1 and the lower end cap 3.

[0025] like Figure 2As shown, the cylindrical body 2 has a diameter of 204mm and a wall thickness of 1.25mm at both ends. The upper end cover 1 and lower end cover 3 have a diameter of 192.5mm and a wall thickness of 1.25mm, forming the internal cavity of the phase change device after assembly. The cavity formed by the upper end cover 1, lower end cover 3, and cylindrical body 2 on both cylindrical sides of the phase change device has a width of 5.5mm and a length of 57mm. Figure 5 As shown, electron beam welding is used to weld the upper end cover 1, lower end cover 3, and cylinder 2. The welding depth of the four cylindrical platforms inside the phase change device is 2.5 mm, and the circumferential welding depth of the outer and inner rings is 3 mm. After welding, the excess height of the electron beam weld is machined to ensure a flatness of no more than 0.2 / 100mm × 100mm. Then, a φ4 filling hole is machined on the upper end cover for filling with phase change paraffin wax, and the area is welded and sealed after filling.

[0026] The working principle of this device is as follows:

[0027] The electronic equipment is installed on the entire phase change device. When the electronic equipment dissipates heat, the phase change material in this device absorbs and stores the heat to prevent the electronic equipment from overheating and causing failure. When the electronic equipment is not working, the phase change material dissipates heat, thus playing a role in thermal buffering and keeping the temperature of the device's chip within a suitable range, avoiding equipment failure caused by temperature conflicts and overheating.

[0028] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless defined as herein. The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this invention. It should be understood that the above descriptions are merely specific embodiments of this invention and are not intended to limit this invention. Within the spirit and principles of this invention, any person skilled in the art may modify or alter the disclosed technical content to create equivalent embodiments applicable to other fields. However, any simple modifications, equivalent changes, alterations, modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of this invention without departing from the content of the technical solution of this invention should be included within the protection scope of this invention.

Claims

1. A small phase change device, characterized in that, The device comprises an upper end cap, a cylindrical body, and a lower end cap. Both the upper and lower end caps have overlapping edges and circular holes. The inner side of the cylindrical body has a hollowed-out cross-shaped structure. One side of the hollowed-out cross-shaped structure has a long cylindrical groove, and the other side has a short cylindrical groove. A protrusion is provided within the long cylindrical groove, and this protrusion is welded to the circular hole on the bottom surface of the upper end cap. The upper end cap is circumferentially welded to the long cylindrical groove via the overlapping edge to form cavity A. The short cylindrical groove has a protrusion that is welded to the circular hole on the bottom surface of the lower end cap, and the lower end cap is circumferentially welded to the short cylindrical groove via the overlapping edge to form cavity B. The hollowed-out portion inside the cross-shaped structure is cavity C. The upper end cap, cylindrical body, and lower end cap are interconnected through cavities A, B, and C. A filling hole is provided on the edge of the upper end cap for filling with phase change material.

2. The apparatus as claimed in claim 1, characterized in that, The hollow cross-shaped structure has a cavity wall width of 4.5mm.

3. The apparatus as described in claim 2, characterized in that, The hollow cross-shaped structure has a cavity wall length of 180mm.

4. The apparatus as described in claim 3, characterized in that, The outer surface of the cylinder has a recess for placing electronic equipment.

5. The apparatus as described in claim 4, characterized in that, There are four circular holes, which are evenly distributed on the upper and lower end caps, and each circular hole is φ25mm.

6. The apparatus as claimed in claim 5, characterized in that, There are four protrusions, which are evenly distributed in the long cylindrical groove and the short cylindrical groove. The protrusions are cylinders with a diameter of φ25mm and a height of 2mm.

7. The apparatus as claimed in claim 6, characterized in that, The overlap has a height of 1mm and a width of 2mm.

Images