A liquid-cooled cold head

Abstract

The utility model discloses a liquid cooling cold head, include: cold head body, the inside and the outer surface of cold head body form respectively cold head cavity and heat exchange surface, cold head cavity is used at least for accommodating two -phase liquid cooling working medium, heat exchange surface is used for with heat source thermal coupling, still form on cold head body air outlet and back liquid port, air outlet with back liquid port with cold head cavity intercommunication to make the gas phase liquid cooling working medium formed in the inside of cold head cavity discharge from air outlet and make after the gas phase liquid cooling working medium condenses and back flows to cold head cavity through back liquid port, the position where air outlet is located is higher than back liquid port on vertical height, back liquid port forms in the preset position of cold head body to make liquid phase liquid cooling working medium can immerse back liquid port in the inside of cold head cavity, the utility model discloses can guarantee the stability of two -phase liquid cooling circulation under the state of no power intervention.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling technology, and in particular to a liquid cooling head. Background Technology

[0002] Utility model patent CN222319420U discloses a two-phase liquid cooling system for servers. Specifically, it discloses a liquid cooling plate directly placed on the corresponding layer of the server to absorb and transfer heat. Utilizing the principle of gravity-driven heat pipes, the liquid refrigerant boils and evaporates within the liquid cooling plate, becoming a gaseous refrigerant. This gaseous refrigerant spontaneously rises to the condenser, releases heat, and condenses back into liquid refrigerant. Finally, under gravity, it flows back to the liquid cooling plate, completing the refrigeration cycle. The heat from the condenser is carried away by a multi-source heat exchanger. The aforementioned circulation structure effectively improves heat conduction efficiency by using latent heat to achieve heat exchange. In addition, its circulation process does not require a power pump, thus it is more energy-efficient. However, in the above-disclosed patent solution, since there is no power intervention, it means that the entire circulation direction cannot be powered. It relies entirely on the rising of gas and the condensed liquid falling under the influence of gravity to achieve the entire circulation process. In the above solution, both the gas pipe and the liquid pipe are connected to the cold plate. After the liquid working fluid undergoes phase change and vaporization, it can easily enter the liquid pipe, causing the entire circulation to fail. Utility Model Content

[0003] This invention provides a liquid-cooled cold head that can ensure the stability of the dual-phase liquid cooling cycle without power intervention.

[0004] To solve the above-mentioned technical problems, this utility model provides a liquid cooling head, comprising:

[0005] A cold head body has a cold head cavity and a heat exchange surface formed on its inner and outer surfaces, respectively. The cold head cavity is used to contain a two-phase liquid cooling medium, and the heat exchange surface is used for thermal coupling with a heat source. The cold head body also has an air outlet and a liquid return port. The air outlet and the liquid return port are connected to the cold head cavity so that the gaseous liquid cooling medium formed inside the cold head cavity is discharged from the air outlet and condensed before flowing back to the cold head cavity through the liquid return port. The air outlet is located at a higher vertical position than the liquid return port. The liquid return port is formed at a predetermined position on the cold head body so that the liquid cooling medium contained inside the cold head cavity can submerge the liquid return port.

[0006] As a preferred embodiment of the above technical solution, the air outlet is formed at the top of the cold head cavity, and the liquid return port is formed on the side of the cold head cavity and near the bottom of the cold head cavity.

[0007] As a preferred embodiment of the above technical solution, the inner wall of the cold head cavity is formed with a guiding surface, which is used to guide and converge the gaseous liquid cooling working fluid to the gas outlet.

[0008] As a preferred embodiment of the above technical solution, the guide surface is a dome-shaped surface, the dome-shaped surface is located at the top of the cold head cavity, and the air outlet is located at the top of the dome-shaped surface.

[0009] As a preferred embodiment of the above technical solution, the cold head body includes a base and a cover. A first recessed space is formed on the base, and a second space is formed on the cover. The base and the cover are sealed together so that the first space and the second space are combined to form the cold head cavity.

[0010] As a preferred embodiment of the above technical solution, the heat exchange surface is formed on the back side of the base.

[0011] As a preferred embodiment of the above technical solution, the heat exchange surface protrudes from the back of the base.

[0012] As a preferred embodiment of the above technical solution, a connecting protrusion is provided on one side of the cold head body, and the connecting protrusion extends in a direction away from the cold head body.

[0013] As a preferred embodiment of the above technical solution, a return channel is formed on the connecting protrusion, and the return channel and the end of the cold head cavity that communicates with each other form the return port.

[0014] As a preferred embodiment of the above technical solution, the interior of the cold head cavity is formed with blades, which are evenly distributed in an array within the cold head cavity. A space is formed between every two adjacent blades. The return channel includes a horizontal channel and a vertical channel. The extension direction of the horizontal channel is consistent with the length direction of the blades. The end of the horizontal channel relative to the opening of the cold head cavity is the return port, which faces the space. The vertical channel extends vertically upward to the upper surface of the connecting protrusion.

[0015] This utility model provides a liquid-cooled cold head, which includes a cold head body with a cold head cavity formed inside. The cold head cavity contains a two-phase liquid cooling medium, and a heat exchange surface is formed on the outer surface of the cold head body. During operation, the heat exchange surface contacts the heat source of the server, and the heat generated by the heat source is transferred to the cold head body through the heat exchange surface. After the cold head body heats up, the two-phase liquid cooling medium undergoes a phase change to produce a gaseous working medium. The gaseous working medium can quickly absorb heat through latent heat and automatically rises and is discharged from the gas outlet to exchange with the external cold source. In the heat exchange process, the gaseous working fluid is condensed. The condensed liquid working fluid then flows back to the cold head cavity through the circulation pipeline under the action of gravity, thus completing the circulation. Since the height of the gas outlet is higher than that of the liquid return port, and the position of the liquid return port ensures that the liquid working fluid contained in the cold head cavity is submerged in the liquid phase, it can prevent the gaseous working fluid generated after the phase change from entering the circulation pipeline through the liquid return port. This makes the circulation in the entire heat exchange process smoother and improves the stability of the self-driven two-phase liquid cooling cycle.

[0016] The above description is merely an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this utility model more obvious and understandable, specific embodiments of this utility model are given below. Attached Figure Description

[0017] Figure 1 A three-dimensional structural schematic diagram of the cold head body at a first angle in this embodiment is shown;

[0018] Figure 2 A partial cross-sectional view of the cold head body in this embodiment is shown;

[0019] Figure 3 A cross-sectional view of the cold head body in this embodiment is shown;

[0020] Figure 4 An exploded perspective view of the cold head body in this embodiment is shown;

[0021] Figure 5 A three-dimensional structural diagram of the cold head body at a second angle is shown in this embodiment;

[0022] Figure 6 A three-dimensional structural diagram of the base in this embodiment is shown;

[0023] Figure 7 A three-dimensional structural diagram of the cover body in this embodiment is shown;

[0024] In the diagram: 10, cover; 20, base; 100, cold head body; 200, cold head cavity; 101, air outlet; 102, second space; 103, guide surface; 104, protruding rib; 201, connecting protrusion; 202, liquid return channel; 203, heat exchange surface; 204, first space; 205, liquid return port; 206, bottom; 207, blade; 2021, vertical channel; 2022, horizontal channel. Detailed Implementation

[0025] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] See Figures 1 to 7 This utility model provides a liquid cooling head, comprising:

[0027] The cold head body 100 has a cold head cavity 200 and a heat exchange surface 203 formed on its interior and exterior surfaces, respectively. The cold head cavity 200 is used to contain at least a two-phase liquid cooling medium, and the heat exchange surface 203 is used for thermal coupling with a heat source. The cold head body 100 also has an air outlet 101 and a liquid return port 205. The air outlet 101 and the liquid return port 205 are connected to the cold head cavity 200 so that the gaseous liquid cooling medium formed inside the cold head cavity 200 is discharged from the air outlet 101 and condensed before flowing back to the cold head cavity 200 through the liquid return port 205. The position of the air outlet 101 is higher than the liquid return port 205 in vertical height. The liquid return port 205 is formed at a predetermined position in the cold head body 100 so that the liquid cooling medium contained inside the cold head cavity 200 can submerge the liquid return port 205.

[0028] This embodiment provides a liquid-cooled cold head, which includes a cold head body 100. A cold head cavity 200 is formed inside the cold head body 100, which contains a two-phase liquid cooling medium. A heat exchange surface 203 is formed on the outer surface of the cold head body 100. During operation, the heat exchange surface 203 contacts the heat source of the server. The heat generated by the heat source is transferred to the cold head body 100 through the heat exchange surface 203. After the cold head body 100 heats up, the two-phase liquid cooling medium undergoes a phase change to produce a gaseous working medium. The gaseous working medium can quickly absorb heat through latent heat. The gaseous working medium automatically rises and is discharged from the outlet 101 to exchange heat with an external cold source. The heat exchange process... The gaseous working fluid is condensed, and the condensed liquid working fluid flows back to the cold head cavity 200 through the circulation pipeline and return port 205 under the action of gravity, thus completing the circulation. Since the height of the gas outlet 101 is higher than that of the return port 205, and the position of the return port 205 can ensure that the working fluid in the liquid phase state contained in the cold head cavity 200 is submerged in the return port 205, it can ensure that the gaseous working fluid generated after the phase change cannot enter the circulation pipeline from the return port 205. It can ensure that the gaseous working fluid after the phase change can only be discharged from the gas outlet 101, which can make the circulation in the entire heat exchange process smoother and improve the stability of the self-driven two-phase liquid cooling cycle.

[0029] Specifically, in this embodiment, the shape and area of ​​the heat exchange surface 203 correspond to the heat source.

[0030] In a further embodiment of this invention, an air outlet 101 is formed at the top of the cold head cavity 200, and a liquid return port 205 is formed on the side of the cold head cavity 200 and near the bottom 206 of the cold head cavity 200.

[0031] In this embodiment, the air outlet 101 is located at the top of the entire cold head cavity 200, and the liquid return port 205 is close to the bottom 206. This can maximize the vertical distance between the liquid return port 205 and the liquid return port 206, which is more conducive to liquid cooling circulation.

[0032] In a further embodiment of this invention, the inner wall of the cold head cavity 200 is formed with a guiding surface 103, which is used to guide the gaseous liquid cooling working fluid to the gas outlet 101.

[0033] In this embodiment, the gaseous working fluid is gathered at the outlet 101 by the guide surface 103. The gathered gaseous working fluid is more conducive to external transportation. Furthermore, the guide surface 103 can effectively prevent local heat accumulation.

[0034] In a further embodiment of this invention, the guide surface 103 is a dome-shaped surface, which is located at the top of the cold head cavity 200, and the air outlet 101 is located at the top of the dome-shaped surface.

[0035] In this embodiment, the guide surface 103 is a dome-shaped surface, and the air outlet 101 is located at the top of the dome-shaped surface, which can be more conducive to the convergence of the gaseous working fluid and can further prevent heat accumulation inside. In this embodiment, the dome-shaped surface is formed with multiple protruding ribs 104, which extend radially along the dome-shaped surface with the air outlet 101 as the center.

[0036] In a further embodiment of this invention, the cold head body 100 includes a base 20 and a cover 10. A first recessed space 204 is formed on the base 20, and a second space 102 is formed on the cover 10. The base 20 and the cover 10 are sealed together so that the first space 204 and the second space 102 are combined to form a cold head cavity 200.

[0037] Specifically, in this embodiment, the dome-shaped surface is formed on the top of the first space 204, and the air outlet 101 is provided on the cover 10, while the liquid return port 205 is provided on one side of the base 20.

[0038] In a further embodiment of this invention, the heat exchange surface 203 is formed on the back side of the base 20.

[0039] In a further embodiment of this invention, the heat exchange surface 203 protrudes from the back of the base 20.

[0040] In a further embodiment of this invention, a connecting protrusion 201 is provided on one side of the cold head body 100, and the connecting protrusion 201 extends in a direction away from the cold head body 100.

[0041] The connecting protrusion 201 in this embodiment is easy to install. Specifically, it is easy to connect to other devices, such as an auxiliary heat sink.

[0042] In a further embodiment of this invention, a return channel 202 is formed on the connecting protrusion 201, and a return port 205 is formed at the end of the return channel 202 that communicates with the cold head cavity 200.

[0043] In this embodiment, the return channel 202 is directly set on the connecting protrusion 201, which facilitates the setting of the return channel 202. In addition, in this embodiment, setting the return channel 202 on the connecting protrusion 201 is beneficial to allow the condensed liquid cooling working fluid to flow back into the cold head cavity 200.

[0044] In a further embodiment of this invention, a blade 207 is formed inside the cold head cavity 200. The blades 207 are evenly spaced in an array in the cold head cavity 200, and a space is formed between each pair of adjacent blades 207. The return channel 202 includes a transverse channel 2022 and a vertical channel 2021. The extension direction of the transverse channel 2022 is consistent with the length direction of the blades 207. The opening end of the transverse channel 2022 relative to the cold head cavity 200 is a return port 205, which faces the space. The vertical channel 2021 extends vertically upward to the upper surface of the connecting protrusion 201.

[0045] In this embodiment, the blade 207 can increase the thermal contact area. In addition, the blade 207 in this embodiment is a rectangular plate. The extension direction of the transverse channel 2022 is consistent with the length direction of the blade 207, and the return port 205 faces the spacer. This is more conducive to the uniform distribution of the liquid working fluid after condensation through the spacer.

[0046] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. Furthermore, the described specific features, structures, materials, or characteristics may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0048] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A liquid-cooled cold head, characterized in that, include: A cold head body has a cold head cavity and a heat exchange surface formed on its inner and outer surfaces, respectively. The cold head cavity is used to contain a two-phase liquid cooling medium, and the heat exchange surface is used for thermal coupling with a heat source. The cold head body also has an air outlet and a liquid return port. The air outlet and the liquid return port are connected to the cold head cavity so that the gaseous liquid cooling medium formed inside the cold head cavity is discharged from the air outlet and condensed before flowing back to the cold head cavity through the liquid return port. The air outlet is located at a higher vertical position than the liquid return port. The liquid return port is formed at a predetermined position on the cold head body so that the liquid cooling medium contained inside the cold head cavity can submerge the liquid return port.

2. The liquid cooling head according to claim 1, characterized in that, The air outlet is formed at the top of the cold head cavity, and the liquid return port is formed on the side of the cold head cavity and near the bottom of the cold head cavity.

3. The liquid cooling head according to claim 1, characterized in that, The inner wall of the cold head cavity is formed with a guiding surface, which is used to guide the gaseous liquid cooling working fluid to the gas outlet.

4. The liquid cooling head according to claim 3, characterized in that, The guide surface is a dome-shaped surface, which is located at the top of the cold head cavity, and the air outlet is located at the top of the dome-shaped surface.

5. The liquid cooling head according to claim 4, characterized in that, The cold head body includes a base and a cover. A first recessed space is formed on the base, and a second space is formed on the cover. The base and the cover are sealed together so that the first space and the second space combine to form the cold head cavity.

6. The liquid cooling head according to claim 5, characterized in that, The heat exchange surface is formed on the back of the base.

7. The liquid cooling head according to claim 6, characterized in that, The heat exchange surface protrudes from the back of the base.

8. The liquid cooling head according to claim 2, characterized in that, A connecting protrusion is provided on one side of the cold head body, and the connecting protrusion extends away from the cold head body.

9. The liquid cooling head according to claim 8, characterized in that, A return channel is formed on the connecting protrusion, and the return channel and the end of the cold head cavity that communicates with each other form the return port.

10. The liquid cooling head according to claim 9, characterized in that, The interior of the cold head cavity is formed with blades, which are evenly distributed in an array. A gap is formed between every two adjacent blades. The return channel includes a horizontal channel and a vertical channel. The horizontal channel extends in the same direction as the length of the blades. The end of the horizontal channel relative to the opening of the cold head cavity is the return port, which faces the gap. The vertical channel extends vertically upward to the upper surface of the connecting protrusion.

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