Finless heat sink

Abstract

A finless radiator, belonging to the technical field of heat dissipation equipment, includes an upper liquid tank, a lower liquid tank, and multiple heat dissipation pipes, each connected at its upper end to the upper liquid tank and at its lower end to the lower liquid tank. The heat dissipation pipes are arranged at intervals along the length of the upper and lower liquid tanks. The key feature is that each heat dissipation pipe is a vertically continuous tube. Multiple arrays of expansion heat dissipation elements are formed at the front and rear ends of the tube towards the center. The front and rear rows of expansion heat dissipation elements are spaced apart along the height of the heat dissipation pipe, and heat dissipation grooves are formed between adjacent expansion heat dissipation elements. Advantages: It eliminates the need for heat dissipation fins without affecting the heat dissipation effect, increases the heat dissipation surface area of ​​the heat dissipation pipe, increases the path of the heat dissipation pipe, prolongs the fluid passage time, and creates fluid turbulence within the heat dissipation pipe, improving the heat dissipation effect and stability of the radiator and extending its service life. It also reduces production costs and assembly difficulty, and improves the cleanliness of the radiator.

Description

Technical Field

[0001] This utility model belongs to the field of heat dissipation equipment technology, specifically relating to a finless heat sink. Background Technology

[0002] As a core component of thermal management systems, heat sinks are used in a wide range of key sectors, including electronic equipment, automobiles, construction, industry, new energy, and ICT. Particularly in high-density computing devices such as servers, electronic components generate significant heat under high loads. If this heat cannot be dissipated effectively and promptly, the device temperature will rise, impacting system stability, performance, and lifespan. Therefore, an efficient and reliable heat sink design is crucial for ensuring the normal operation of servers. The server host absorbs heat through its internal water-cooling system and transfers it to the heat sink, which then dissipates the heat from the coolant.

[0003] Currently, most radiators use a structure that combines metal heat pipes with dense fins. The basic principle is to use heat pipes (usually made of copper or aluminum) to quickly conduct heat from the coolant, and to increase the heat dissipation surface area by using numerous metal fins around the heat pipes. Then, with the help of forced convection methods such as fans, the heat is transferred to the surrounding environment.

[0004] However, traditional finned heat sinks have many defects and shortcomings in practical applications, mainly in the following aspects: First, the fin installation process is complex and the manufacturing cost is high. Traditional finned heat sinks require welding, riveting, or other methods to fix a large number of fine metal fins around the heat pipe. These fins have a high density and small spacing, which not only requires high processing precision but also involves a complicated installation process, usually involving welding, brazing, and mechanical pressing. This results in low production efficiency, difficulty in controlling the yield rate, and also increases the overall manufacturing cost and assembly difficulty of the heat sink. Second, the fins are prone to blockage, and poor ventilation leads to a decrease in heat dissipation efficiency. In high-dust or high-airflow environments such as servers, the narrow gaps between the fins are easily blocked by dust, hair, or other foreign objects. Once blockage occurs, the airflow resistance increases sharply, resulting in a significant reduction in the airflow through the fins and a substantial decrease in heat dissipation capacity. Especially during high-load operation, if the heat sink is not well ventilated, it will directly cause the hot spot temperature to rise, and may even trigger system overheat protection or performance throttling. Third, the fin structure restricts airflow organization, affecting the overall uniformity of heat dissipation. Although densely arranged fins increase the theoretical heat dissipation area, their guiding effect on airflow is limited, easily leading to uneven airflow distribution. Some areas have excessively low wind speeds, while other areas may experience large local wind pressure losses due to overly concentrated airflow channels, thus affecting the uniformity and overall efficiency of heat dissipation. Fourth, the thermal resistance of the fin material and structure affects heat transfer efficiency. As an additional structure, the fins themselves have a relatively long heat transfer path, and the contact thermal resistance between them and the heat sink is difficult to completely eliminate, further affecting the heat transfer efficiency from the heat sink to the fins and then from the fins to the environment. Especially in high-temperature or instantaneous high-heat impact scenarios, the response speed and heat dissipation capacity of the finned structure often cannot meet actual needs. Fifth, traditional fins require a large amount of brazing and soldering work, which greatly affects the overall cleanliness of the product, making it difficult to meet the requirements of some fields with high cleanliness requirements for heat sinks.

[0005] In view of the aforementioned problems, it is necessary to design a finless radiator that is simple in structure, low in cost, highly clean, and capable of operating without fins without affecting heat dissipation, while also providing large airflow and being less prone to clogging. To this end, the applicant has conducted active and beneficial research, resulting in the technical solution described below. Utility Model Content

[0006] The objective of this invention is to provide a finless radiator that helps improve the structure of the heat pipe, allowing the radiator to maintain good heat dissipation while eliminating the need for heat dissipation fins, thereby increasing airflow and reducing processing difficulty. This improves the heat dissipation effect, stability, and service life of the radiator, reduces production costs, and significantly enhances the cleanliness of the radiator.

[0007] The present invention achieves its objective as follows: a finless radiator includes an upper liquid tank, a lower liquid tank symmetrically arranged below the upper liquid tank, and multiple heat dissipation pipes whose upper ends are connected to the upper liquid tank and whose lower ends are connected to the lower liquid tank. The multiple heat dissipation pipes are arranged at intervals along the length of the upper and lower liquid tanks. The key feature is that each heat dissipation pipe is a vertically continuous tube. The front and rear ends of the heat dissipation pipe each form multiple arrays of expansion heat dissipation bodies towards the middle of the tube body. The front and rear rows of expansion heat dissipation bodies are arranged at intervals along the height of the heat dissipation pipe, and a heat dissipation groove is formed between each pair of adjacent expansion heat dissipation bodies.

[0008] In a specific embodiment of this utility model, at least one partition is provided at intervals along the length direction inside the upper liquid tank, and the partition divides the space inside the upper liquid tank into multiple chambers. Multiple upper connecting seats corresponding to heat dissipation pipes are formed by downward protrusion on the lower end surface of the upper liquid tank. The multiple upper connecting seats are arranged at intervals along the length direction of the upper liquid tank. Each upper connecting seat has an upper connecting seat hole that communicates with the inside of the upper liquid tank. Each heat dissipation pipe has an upper pipe head that is inserted into and fixed to the corresponding upper connecting seat hole at its upper end.

[0009] In another specific embodiment of this utility model, a lower liquid tank is formed inside a lower liquid cavity. Multiple lower connecting seats corresponding to heat dissipation pipes are formed by upward protrusion on the upper surface of the lower liquid tank. The multiple lower connecting seats are spaced apart along the length direction of the lower liquid tank. A lower connecting seat hole communicating with the interior of the lower liquid tank is opened on each lower connecting seat. A heat dissipation pipe lower tube head is provided at the lower end of each heat dissipation pipe and is inserted into and fixed to the corresponding lower connecting seat hole.

[0010] In another specific embodiment of this utility model, an inlet pipe and a first pressure measuring pipe communicating with the left chamber are respectively provided on the upper end face of the upper liquid tank at the position corresponding to the left chamber, and an outlet pipe, a second pressure measuring pipe, and an exhaust pipe communicating with the right chamber are respectively provided on the upper end face of the upper liquid tank at the position corresponding to the right chamber.

[0011] In another specific embodiment of this utility model, a drain hole communicating with the lower liquid chamber is provided on the lower end face of the lower liquid tank, and the drain hole is sealed by a plug.

[0012] In another specific embodiment of this utility model, the expansion heat sink is integrally formed on the heat sink pipe through an expansion process, and an expansion heat sink cavity is formed inside the expansion heat sink. The transverse cross-sectional shape of the expansion heat sink is one of the following: circular, elliptical, rectangular, or polygonal.

[0013] In a further specific embodiment of this utility model, the cross-sectional shape of the heat dissipation pipe is one of the following: circular, elliptical, rectangular, polygonal, or elongated.

[0014] In a more specific embodiment of this utility model, at least one reinforcing rib is provided along the length direction on the heat dissipation pipe at the position between the front and rear rows of expansion heat dissipation bodies.

[0015] In yet another specific embodiment of this utility model, a ventilation channel is formed between each of the two adjacent heat dissipation pipes.

[0016] In another specific embodiment of this utility model, the heat dissipation pipe is one of copper pipe, aluminum pipe, stainless steel pipe, or composite material pipe.

[0017] The present invention, by adopting the above-mentioned technical solution, has the following beneficial effects: First, due to the use of an expanded heat sink structure formed on the heat sink pipe, the expanded heat sink is integrally expanded and molded with the heat sink pipe, replacing the traditional heat sink fins. This eliminates the need for heat sink fin installation without affecting the heat dissipation effect, not only increasing the heat dissipation surface area of ​​the heat sink pipe but also increasing the path of the heat sink pipe, thereby extending the fluid passage time and causing fluid turbulence within the heat sink pipe. This effectively improves the heat dissipation effect and stability of the radiator and extends its service life, while also reducing the production cost and assembly difficulty of the radiator. Second, by reducing a large amount of fin welding work, the cleanliness of the radiator is greatly improved. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model; Figure 2 This is a schematic diagram of the structure of the heat dissipation pipe described in this utility model; Figure 3 for Figure 1 Front view of the embodiment; Figure 4 This is a schematic diagram of the transverse cross-section of the heat dissipation pipe described in this utility model; In the diagram: 1. Upper liquid tank, 11. Inlet chamber, 12. Outlet chamber, 13. Baffle plate, 14. Upper connecting seat, 141. Upper connecting seat hole, 15. Inlet pipe, 16. Outlet pipe, 17. First pressure measuring pipe, 18. Second pressure measuring pipe, 19. Exhaust pipe; 2. Lower liquid tank, 21. Lower liquid chamber, 22. Lower connecting seat, 221. Lower connecting seat hole, 23. Drain hole, 231. Plug; 3. Heat dissipation pipe, 31. Upper end of heat dissipation pipe, 32. Lower end of heat dissipation pipe, 33. Expansion heat dissipation body, 331. Expansion heat dissipation cavity, 34. Heat dissipation groove, 35. Reinforcing rib; 4. Ventilation channel. Detailed Implementation

[0019] The specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. However, the description of the embodiments is not a limitation on the technical solution. Any formal but not substantive changes made based on the concept of this utility model should be considered within the protection scope of this utility model.

[0020] In the following description, all directional or positional concepts involving up, down, left, right, front, and back are based on... Figure 1 The positions shown are for reference only and should not be construed as a specific limitation on the technical solution provided by this utility model.

[0021] Please see Figure 1 , Figure 2 and Figure 4 The illustration shows a finless radiator, including an upper liquid tank 1, a lower liquid tank 2 symmetrically arranged below the upper liquid tank 1, and a plurality of heat dissipation pipes 3 whose upper ends are respectively connected to the upper liquid tank 1 and whose lower ends are respectively connected to the lower liquid tank 2. The plurality of heat dissipation pipes 3 are arranged at intervals along the length direction of the upper liquid tank 1 and the lower liquid tank 2.

[0022] The key technical points of the technical solution provided by this utility model are as follows: the aforementioned heat dissipation pipe 3 is a pipe body that runs vertically through the pipe. The front end and the rear end of the heat dissipation pipe 3 are respectively arranged with multiple arrays of expansion heat dissipation bodies 33 towards the middle of the heat dissipation pipe body. The front and rear rows of expansion heat dissipation bodies 33 are spaced apart along the height direction of the heat dissipation pipe 3, and a heat dissipation groove 34 is formed between two adjacent expansion heat dissipation bodies 33. The aforementioned expansion heat dissipation bodies 33 are integrally formed on the heat dissipation pipe 3 by an expansion process. An expansion heat dissipation cavity 331 is formed in each of the aforementioned expansion heat dissipation bodies 33. The aforementioned expansion heat dissipation cavity 331 makes the channel of the heat dissipation pipe 3 form a channel structure that is narrow at first and then wide, and a ventilation channel 4 is formed between two adjacent aforementioned heat dissipation pipes 3.

[0023] The material of the aforementioned heat dissipation pipe 3 is not limited in any way and can be one of copper pipe, aluminum pipe, stainless steel pipe, or composite material pipe. The composite material pipe can be steel-aluminum composite pipe, copper-aluminum composite pipe, polymer-based composite pipe, stainless steel-aluminum composite pipe, etc. In this embodiment, the aforementioned heat dissipation pipe 3 is preferably a copper pipe.

[0024] The transverse cross-sectional shape of the aforementioned expansion heat sink 33 is not limited in any way and can be one of the following: circular, elliptical, rectangular, or polygonal. In this embodiment, the transverse cross-section of the aforementioned expansion heat sink 33 is preferably elliptical.

[0025] Please see Figure 1At least one partition 13 is provided at intervals along the length of the aforementioned upper liquid tank 1. The aforementioned partition 13 divides the space inside the upper liquid tank 1 into multiple chambers. In this embodiment, the number of the aforementioned partition 13 is preferably one. The partition 13 divides the space inside the upper liquid tank 1 into an inlet chamber 11 (i.e., the left chamber) and an outlet chamber 12 (i.e., the right chamber). Multiple upper connecting seats 14 are formed by protruding downward on the lower end surface of the aforementioned upper liquid tank 1, corresponding to the heat dissipation pipe 3. The multiple upper connecting seats 14 are provided at intervals along the length of the upper liquid tank 1. Each of the aforementioned upper connecting seats 14 has an upper connecting seat hole 141 that communicates with the interior of the upper liquid tank 1. The upper end of the aforementioned heat dissipation pipe 3 is provided with a heat dissipation pipe head 31 that is inserted into and fixed to the corresponding upper connecting seat hole 141. The aforementioned heat dissipation pipe 3 is fixed to the upper connecting seat hole 141 by welding.

[0026] The aforementioned lower liquid tank 2 contains a lower liquid cavity 21. Multiple lower connecting seats 22, corresponding to the heat dissipation pipes 3, protrude upwards from the upper surface of the lower liquid tank 2. These lower connecting seats 22 are spaced apart along the length of the lower liquid tank 2. Each lower connecting seat 22 has a lower connecting seat hole 221 communicating with the interior of the lower liquid tank 2. The lower end of each heat dissipation pipe 3 has a heat dissipation pipe lower tube head 32 that is inserted into and fixed to the corresponding lower connecting seat hole 221. A drain hole 23 communicating with the lower liquid cavity 21 is formed on the lower surface of the lower liquid tank 2. The drain hole 23 is sealed by a plug 231. The heat dissipation pipes 3 are fixed to the lower connecting seat holes 221 by welding.

[0027] On the upper surface of the aforementioned upper liquid tank 1, corresponding to the position of the liquid inlet chamber 11 (left side chamber), there are respectively an inlet pipe 15 and a first pressure measuring pipe 17 communicating with the liquid inlet chamber 11. On the upper surface of the aforementioned upper liquid tank 1, corresponding to the position of the liquid outlet chamber 12 (right side chamber), there are respectively an outlet pipe 16 and a second pressure measuring pipe 18 communicating with the liquid outlet chamber 12, and an exhaust pipe 19. The aforementioned inlet pipe 15 and outlet pipe 16 are respectively connected to the cooling cycle of the server host. Pressure sensors are respectively installed on the aforementioned first pressure measuring pipe 17 and second pressure measuring pipe 18. By observing the pressure difference between the aforementioned first pressure measuring pipe 17 and second pressure measuring pipe 18, it can be determined whether the heat sink 3 is blocked.

[0028] In actual use, depending on the customer's liquid inlet / outlet position and heat dissipation requirements, it is possible to choose not to install the partition 13. In this case, the aforementioned liquid outlet pipe 16, the second pressure measuring pipe 18, and the exhaust pipe 19 need to be installed on the lower end face of the lower liquid tank 2. This is something that ordinary people skilled in the art can easily think of.

[0029] Please see Figure 2The cross-sectional shape of the heat sink 3 is not limited in any way and can be circular, elliptical, rectangular, polygonal or elongated, etc. In this embodiment, the cross-sectional shape of the heat sink 3 is preferably elongated.

[0030] Please see Figure 2 At least one reinforcing rib 35 is provided along the length direction at the position between the front and rear rows of expansion heat sinks 33 on the aforementioned heat sink 3. In this embodiment, the number of the aforementioned reinforcing ribs 35 is preferably one. In actual use, depending on the different processing schemes, cross-sectional shapes and sizes of the aforementioned heat sink 3, it is also possible to choose not to provide reinforcing ribs 35 while ensuring the strength of the heat sink 3.

[0031] Please continue reading. Figures 1-4 The cooling system absorbs heat through the coolant and transfers it into the aforementioned inlet pipe 15. The coolant fills the aforementioned inlet chamber 11 and enters the corresponding heat dissipation pipe 3 through the upper connecting seat hole 141 connected to the inlet chamber 11. The coolant first enters the corresponding heat dissipation pipe 3 through the upper pipe head 31 of the aforementioned heat dissipation pipe, and then continuously passes through a continuous channel formed by the expansion heat sink 33, which is narrow at first and then widens. Then, the coolant transfers heat to the aforementioned heat dissipation pipe 3 and dissipates the heat to the surrounding environment through the surface of the heat dissipation pipe 3. The coolant that has passed through the aforementioned heat dissipation pipe 3 enters the lower liquid chamber 21 through the lower pipe head 32 of the heat dissipation pipe, and then enters the heat dissipation pipe 3 connected to the outlet chamber 12 through the lower connecting seat hole 221. The coolant enters the heat sink 3 from the lower tube end 32 of the aforementioned heat sink 3 and continuously passes through a continuous channel formed by the expansion heat sink 33, which is narrow at first and then wide. The heat of the coolant is transferred to the aforementioned heat sink 3 again, and the heat is dissipated to the surrounding environment by the surface of the heat sink 3. The coolant enters the outlet chamber 12 through the upper tube end 31 of the aforementioned heat sink 3. During the process of the coolant passing through the aforementioned heat sink 3, the fan generates strong convection. When the strong convection air passes through the aforementioned ventilation channel 4 and heat sink 34, it carries away the heat from the surface of the heat sink 3 and cools the heat sink 3. Finally, the coolant in the aforementioned outlet chamber 12 re-enters the cooling system through the outlet pipe 16 to achieve a cooling cycle.

[0032] It should be noted that the above embodiments can be freely combined as needed. The above are merely preferred embodiments of the utility model. It should be pointed out that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications should also be considered within the protection scope of the utility model.

[0033] In summary, the technical solution provided by this utility model makes up for the shortcomings of the prior art, successfully completes the utility model task, and faithfully realizes the technical effects described by the applicant in the above technical effect column.

Claims

1. A finless radiator, comprising an upper liquid tank (1), a lower liquid tank (2) symmetrically arranged below the upper liquid tank (1), and a plurality of heat dissipation pipes (3) whose upper ends are respectively connected to the upper liquid tank (1) and whose lower ends are respectively connected to the lower liquid tank (2), wherein the plurality of heat dissipation pipes (3) are arranged at intervals along the length direction of the upper liquid tank (1) and the lower liquid tank (2), characterized in that: The heat dissipation pipe (3) is a tube that runs vertically through the tube. The front end and the rear end of the heat dissipation pipe (3) are respectively arranged with multiple arrays of expansion heat dissipation bodies (33) towards the middle of the heat dissipation pipe body. The front and rear rows of expansion heat dissipation bodies (33) are spaced apart along the height direction of the heat dissipation pipe (3), and a heat dissipation groove (34) is formed between two adjacent expansion heat dissipation bodies (33).

2. The finless radiator according to claim 1, characterized in that: At least one partition (13) is provided at intervals along the length direction inside the upper liquid tank (1). The partition (13) divides the space inside the upper liquid tank (1) into multiple chambers. Multiple upper connecting seats (14) corresponding to the heat dissipation pipes (3) are provided on the lower end surface of the upper liquid tank (1). The multiple upper connecting seats (14) are provided at intervals along the length direction of the upper liquid tank (1). Each upper connecting seat (14) has an upper connecting seat hole (141) that communicates with the inside of the upper liquid tank (1). Each heat dissipation pipe (3) has an upper pipe head (31) that is inserted into and fixed to the corresponding upper connecting seat hole (141) at its upper end.

3. The finless radiator according to claim 1, characterized in that: The lower liquid tank (2) has a lower liquid cavity (21) inside. The upper surface of the lower liquid tank (2) has multiple lower connecting seats (22) that are corresponding to the heat dissipation pipe (3) protruding upward. The multiple lower connecting seats (22) are spaced apart along the length of the lower liquid tank (2). Each lower connecting seat (22) has a lower connecting seat hole (221) that communicates with the interior of the lower liquid tank (2). The lower end of each heat dissipation pipe (3) is provided with a heat dissipation pipe lower pipe head (32) that is inserted into and fixed to the corresponding lower connecting seat hole (221).

4. A finless radiator according to claim 2, characterized in that: On the upper end face of the upper liquid tank (1), at the position corresponding to the left chamber, there is an inlet pipe (15) and a first pressure measuring pipe (17) communicating with the left chamber. On the upper end face of the upper liquid tank (1), at the position corresponding to the right chamber, there is an outlet pipe (16) and a second pressure measuring pipe (18) communicating with the right chamber, as well as an exhaust pipe (19).

5. A finless radiator according to claim 3, characterized in that: The lower end face of the lower liquid tank (2) is provided with a drain hole (23) that communicates with the lower liquid chamber (21), and the drain hole (23) is sealed by a plug (231).

6. A finless radiator according to claim 1, characterized in that: The expansion heat sink (33) is integrally formed on the heat sink (3) by an expansion process. Each expansion heat sink (33) has an expansion heat sink cavity (331) inside. The cross-sectional shape of the expansion heat sink (33) is one of the following: circular, elliptical, rectangular, or polygonal.

7. A finless radiator according to claim 1, characterized in that: The cross-sectional shape of the heat dissipation pipe (3) is one of the following: circular, elliptical, rectangular, polygonal, or elongated.

8. A finless radiator according to claim 1, characterized in that: At least one reinforcing rib (35) is provided along the length direction on the heat dissipation pipe (3) between the front and rear rows of expansion heat dissipation bodies (33).

9. A finless radiator according to claim 1, characterized in that: A ventilation channel (4) is formed between each of the two adjacent heat dissipation pipes (3).

10. A finless radiator according to claim 1, characterized in that: The heat dissipation pipe (3) is one of copper pipe, aluminum pipe, stainless steel pipe, or composite material pipe.

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