A pulsating heat pipe

Abstract

The application discloses a pulsating heat pipe, which comprises a first plate body and a second plate body arranged oppositely; a heat conduction flow channel is formed between the first plate body and the second plate body, the heat conduction flow channel comprises a plurality of bent sub-flow channels, and a first interval is formed between two adjacent sub-flow channels; and a ratio of an equivalent diameter of the heat conduction flow channel to the first interval ranges from 0.5 to 2. By setting the ratio of the equivalent diameter of the heat conduction flow channel to the first interval between the sub-flow channels within a reasonable range, phase change heat transfer under an inverse gravity field can be realized, the heat transfer efficiency is higher, and the heat dissipation effect of the pulsating heat pipe can be improved. Moreover, the pulsating heat pipe disclosed by the application is free of a sintered core, has better structural flexibility, and can significantly reduce the cost.

Description

Technical Field

[0001] This application relates to the field of heat dissipation technology, and in particular to a pulsating heat exchanger. Background Technology

[0002] Heat pipe technology, previously widely used in aerospace and military industries, has revolutionized radiator manufacturing by transforming traditional radiator design. It has moved beyond the reliance on high-airflow motors for optimal cooling, enabling radiators to achieve satisfactory heat exchange and opening new avenues in the cooling industry. Heat pipe technology fully leverages the principles of heat conduction and the rapid heat transfer properties of phase-change media, quickly transferring heat from the heat source to the outside. Its thermal conductivity surpasses that of any known metal. However, conventional gravity heat pipes or vapor chambers must meet the application conditions in the direction of gravity to achieve normal phase-change heat transfer. Currently, vapor chambers capable of operating completely against gravity must employ a sintered core structure, resulting in poor structural flexibility and high costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, such as conventional gravity heat pipes failing to meet phase change heat transfer requirements in anti-gravity scenarios and the high cost and structural flexibility associated with sintered core structures required for vapor chambers capable of fully anti-gravity applications, this application provides the following technical solutions:

[0004] A pulsating heat spreader is provided, comprising a first plate and a second plate disposed opposite to each other; a heat-conducting channel is formed between the first plate and the second plate, the heat-conducting channel comprising a plurality of bent sub-channels, a first spacing between adjacent sub-channels, and the ratio of the equivalent diameter of the heat-conducting channel to the first spacing being in the range of 0.5-2.

[0005] In one embodiment of this application, the equivalent diameter of the heat-conducting channel is less than or equal to 2 mm.

[0006] In one embodiment of this application, the first spacing is less than or equal to 2 mm.

[0007] In one embodiment of this application, the heat-conducting channel is filled with a heat-conducting working fluid, which includes at least one of water, ethanol, acetone, chloroform, tetrafluoroethane, and ammonia.

[0008] In one embodiment of this application, the pulsating heat spreader includes a first connecting plate and a second connecting plate connected to each other. The heat-conducting channels on the second connecting plate correspond one-to-one with the heat-conducting channels on the first connecting plate, and the included angle between the first connecting plate and the second connecting plate ranges from 0 to 180 degrees. In another embodiment of this application, a second connecting plate is connected to each of the two sides of the first connecting plate.

[0009] In one embodiment of this application, the pulsating temperature equalizer further includes a third connecting plate connected to the second connecting plate; the included angle between the third connecting plate and the second connecting plate is in the range of 0-180 degrees.

[0010] In one embodiment of this application, the first plate and the second plate are welded together by gas shielded welding to form a sealed cavity, and a heat conduction channel is provided in the sealed cavity.

[0011] In one embodiment of this application, the number of sub-channels is greater than or equal to 10.

[0012] In one embodiment of this application, an anti-clogging groove is provided around the heat conduction channel.

[0013] In one embodiment of this application, the distance between the anti-clogging groove and the heat-conducting channel is less than or equal to 2 mm.

[0014] In one embodiment of this application, the pulsating temperature equalizer is made of aluminum alloy, stainless steel or copper.

[0015] In one embodiment of this application, the thermally conductive working fluid accounts for 30%-60% of the thermally conductive flow channel.

[0016] In one embodiment of this application, the surface of the first plate facing the second plate has a plurality of first flow channel grooves, and / or the surface of the second plate facing the first plate has a plurality of second flow channel grooves;

[0017] Each of the first flow channel grooves and each of the second flow channel grooves forms the heat-conducting flow channel, or each of the first flow channel grooves and the second plate forms the heat-conducting flow channel, or the first plate and each of the second flow channel grooves forms the heat-conducting flow channel.

[0018] In one embodiment of this application, the first channel groove and / or the second channel groove of the heat-conducting channel are etching grooves.

[0019] By implementing the pulsating vapor chamber described in this application, and setting the ratio of the equivalent diameter of the heat-conducting channels to the first spacing between the sub-channels within a reasonable range, phase change heat transfer under anti-gravity conditions is achieved while simultaneously increasing heat transfer efficiency, thus improving the heat dissipation effect of the pulsating vapor chamber. Furthermore, the pulsating vapor chamber of this application has no sintered core, offering good structural flexibility and significantly reducing costs. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of a pulsating heat spreader.

[0022] Figure 2 This is a perspective view of a pulsating heat spreader.

[0023] Figure 3 This is an exploded view of a pulsating heat spreader.

[0024] Figure 4 This is a schematic diagram of the internal heat conduction channels of a pulsating heat spreader.

[0025] Figure 5 This is a magnified view of a portion of the heat conduction channel. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The numbers in the accompanying drawings are only used to distinguish individual functional parts or modules and do not indicate logical relationships between parts or modules. The terms “comprising,” “including,” or “including,” and similar terms mean that the element or object preceding the term encompasses the element or object listed following the term and its equivalents, without excluding other elements or objects. The terms “connected,” “linked,” and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. “Above,” “below,” “left,” “right,” etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0028] The various embodiments according to this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that in the drawings, the same reference numerals are assigned to components having substantially the same or similar structure and function, and repeated descriptions of them will be omitted.

[0029] In view of the fact that conventional gravity heat pipes cannot meet the phase change heat transfer requirements in anti-gravity scenarios, and that heat pipes capable of completely anti-gravity applications must employ a sintered core structure, resulting in excessively high costs, and that anti-gravity vapor chambers with sintered core structures have poor flexibility and are not easily bent, thus failing to meet the requirements for long-distance heat transfer, this application provides the following technical solutions to address the above problems:

[0030] In some embodiments, see Figures 1 to 4 A pulsating heat exchanger is provided, wherein the pulsating heat exchanger 130 has a heat-conducting channel 131, the heat-conducting channel 131 including a plurality of bent sub-channels 1311. The heat-conducting channel 131 is filled with a heat-conducting working fluid, which flows in the heat-conducting channel 131 and is capable of oscillating flow heat transfer. Figure 2 for Figure 1 A perspective view of the pulsating heat spreader 130 shown.

[0031] Multiple sub-channels 1311 can be connected to form a loop. The heat transfer medium can flow in each sub-channel 1311 to achieve the circulation of the heat transfer medium in the loop and realize the transfer of heat.

[0032] The heat-conducting channels 131 within the pulsating heat spreader 130 are evacuated, and a portion of the heat-conducting working fluid is filled into the heat-conducting channels 131. Under the influence of surface tension and gravity, the heat-conducting working fluid is separated within the heat-conducting channels 131, forming gas columns and heat-conducting working fluid columns (i.e., liquid columns), and these columns are staggered from the heating end to the cooling end.

[0033] At the heating end, the gas column expands due to heating. Simultaneously, some of the heat-conducting medium boils, generating bubbles that propel the heat-conducting medium and gas column from the high-temperature heating end to the low-temperature cooling end. Because the temperature at the cooling end is lower, the bubbles contract and burst, causing a pressure drop.

[0034] Because there is a pressure difference between the heating end and the cooling end of the pulsating heat spreader 130, and the pressure imbalance between adjacent heat conduction channels 131, the heat conduction medium oscillates and flows between the heating end and the cooling end. During the pulsation process, the gas column will crack, merge and liquefy, and the heat conduction medium will also separate, merge and vaporize.

[0035] At the cooling end, the gas column and the heat-conducting working fluid release heat. The gas column decreases or disappears during pulsation, further inducing pulsation, thereby achieving heat transfer. During the heat transfer process, no external mechanical or electrical work is required; it is entirely a self-oscillation driven by heat.

[0036] Furthermore, the heat exchange mechanism of the pulsating heat exchanger 130 in this application combines sensible and latent heat exchange, with the gas-liquid phase change heat transfer of the working fluid during operation providing the power for sensible heat exchange. Unlike conventional gravity heat pipes, the pulsating heat exchanger 130 in this application exhibits both phase change heat transfer and oscillating flow heat transfer during the heat transfer process, resulting in higher heat transfer efficiency.

[0037] See Figures 1 to 3 In one embodiment, the pulsating heat spreader 130 includes a first plate 132 and a second plate 133 disposed opposite to each other, and a heat conduction channel 131 is formed between the first plate 132 and the second plate 133.

[0038] The surface of the first plate 132 facing the second plate 133 has a plurality of first flow channel grooves 1321, and the surface of the second plate 133 facing the first plate 132 has a plurality of second flow channel grooves 1331. The first plate 132 is disposed on the second plate 133, and each first flow channel groove 1321 and each second flow channel groove 1331 surrounds a heat-conducting flow channel 131. Figure 3 for Figure 1 An exploded view of the pulsating heat spreader 130 shown.

[0039] The lower surface of the first plate 132 has a plurality of recessed first flow channel grooves 1321, and the upper surface of the second plate 133 has a plurality of recessed second flow channel grooves 1331. The plurality of first flow channel grooves 1321 and the plurality of second flow channel grooves 1331 are arranged in a one-to-one correspondence. After the first plate 132 is disposed on the second plate 133, each first flow channel groove 1321 can form a heat-conducting flow channel 131 with the corresponding second flow channel groove 1331 to allow the flow of heat-conducting working fluid.

[0040] Of course, in other embodiments of this application, a plurality of first flow channel grooves 1321 may be provided only on the surface of the first plate 132 facing the second plate 133, and the plurality of first flow channel grooves 1321 and the second plate 133 may form a heat-conducting flow channel 131. Alternatively, the surface of the second plate 133 facing the first plate 132 may have a plurality of second flow channel grooves 1331, and the first plate 132 and the plurality of second flow channel grooves 1331 may form a heat-conducting flow channel 131. Both the first flow channel grooves 1321 and the second flow channel grooves 1331 are etching grooves, and both the first flow channel grooves 1321 and the second flow channel grooves 1331 are formed by etching process.

[0041] Compared to setting the flow channel groove on only one plate, the pulsating heat spreader with flow channel grooves on both plates is thinner overall for the same heat conduction channel size, which is more conducive to improving the heat transfer effect.

[0042] In one embodiment, the first plate 132 and the second plate 133 are connected by welding. In this way, welding can reliably connect the first plate 132 and the second plate 133 and ensure the sealing of the connection to prevent leakage of the heat transfer fluid.

[0043] Due to the limitations of the etching process itself, when the first flow channel groove 1321 and the corresponding second flow channel groove 1331 are welded to form the heat conduction channel 131, blockage or water leakage in the heat conduction channel is likely to occur. This application achieves the effect of preventing blockage and water leakage in the heat conduction channel 131 by controlling the solder layer ratio of the two plates to be less than 10%, thereby achieving a thinner overall thickness of the pulsating heat spreader and further improving the heat transfer effect.

[0044] Furthermore, during welding, a liquid filling pipe is provided at one end of the first plate 132 and the second plate 133 to facilitate the injection of heat-conducting working fluid into the heat conduction channel 131. The heat conduction channel 131 is evacuated and the heat conduction working fluid is injected through the liquid filling pipe. Subsequently, the area is sealed to ensure the sealing performance of the pulsating heat spreader 130.

[0045] In one embodiment, the first plate 132 and the second plate 133 are connected by gas shielded welding to form a sealed cavity, and a heat-conducting channel is formed within the sealed cavity. Of course, in other embodiments of this application, the first plate 132 and the second plate 133 may also be connected by welding methods such as vacuum brazing.

[0046] In one embodiment, the pulsating heat spreader 130 is made of aluminum alloy. That is, the pulsating heat spreader 130 is an aluminum alloy plate to ensure the thermal conductivity of the pulsating heat spreader 130. At the same time, the surface of the aluminum alloy plate is covered with solder and flux, which facilitates the welding connection by gas shielded welding.

[0047] Of course, in other embodiments of this application, the pulsating heat spreader 130 may also be made of stainless steel, copper, or other materials that can achieve heat transfer.

[0048] See Figure 2 - Figure 4 In one embodiment, the number of sub-channels 1311 is greater than or equal to 10. Preferably, the number of sub-channels 1311 is greater than or equal to 20. That is, the heat-conducting channels 131 are arranged in a generally S-shape in the pulsating heat spreader 130, including at least 10 sub-channels. In this way, the flow area of ​​the heat-conducting working fluid can be increased, ensuring the heat conduction effect.

[0049] There is a first spacing between two adjacent sub-channels 1311. Experiments showed that when the equivalent diameter of the heat-conducting channel 131 is greater than 2 mm, the effect of anti-gravity heat transfer cannot be achieved. The following table shows the experimental data:

[0050]

[0051]

[0052] When the first spacing is 2.5mm, the equivalent diameter of the heat conduction channel 131 is 1mm, and the ratio of the equivalent diameter of the heat conduction channel 131 to the first spacing is 0.4, the equivalent thermal conductivity of the pulsating heat spreader is less than 4000W / mK. Furthermore, due to the large spacing, the welding contact area on both sides of the heat conduction channel is large, resulting in more solder, which may cause blockage of the heat conduction channel and affect the heat transfer effect.

[0053] Preferably, the ratio of the equivalent diameter of the heat-conducting channel 131 to the first spacing is in the range of 0.5-2.

[0054] Preferably, the equivalent diameter of the heat conduction channel 131 is less than or equal to 2 mm, and the first spacing is less than or equal to 2 mm.

[0055] See Figure 5 In this embodiment, the equivalent diameter of the heat conduction channel 131 is 1 mm, and the first spacing L is 2 mm.

[0056] In this application, the anti-gravity effect can be effectively achieved by controlling the equivalent diameter of the heat-conducting channel 131. Furthermore, by setting the size of the first spacing and ensuring the ratio of the equivalent diameter of the heat-conducting channel 131 to the first spacing is within the aforementioned range, the number of sub-channels 1311 in the pulsating heat spreader 130 can be increased. This allows the pulsating heat spreader 130 to achieve phase change heat transfer in anti-gravity scenarios while simultaneously achieving higher heat transfer efficiency, thus improving the heat dissipation effect of the pulsating heat spreader. In one embodiment, the heat-conducting channel 131 has a rectangular cross-section. Of course, in other embodiments of this application, the cross-section of the heat-conducting channel 131 can also be circular, and the equivalent diameter of the heat-conducting channel 131 is the diameter of its circumscribed circle.

[0057] In specific embodiments, the heat transfer medium includes at least one of water, ethanol, acetone, chloroform, tetrafluoroethane, or ammonia. It is understood that different heat transfer media have different physical properties such as viscosity and surface tension, and therefore different heat transfer media require different dimensions of the heat transfer channels 131 to achieve phase change heat transfer in anti-gravity scenarios.

[0058] In one embodiment, the proportion of the heat-conducting working fluid in the heat-conducting flow channel 131 is 30%-60%, so that heat-conducting working fluid columns and gas columns can be formed alternately in the heat-conducting flow channel 131.

[0059] The operation of the pulsating heat exchanger 130 in this application is affected by various factors such as heating power, equivalent diameter of the heat conduction channel 131, length of the heat conduction channel 131, as well as gravity, type of heat transfer medium, and charging ratio of heat transfer medium. Under appropriate operating conditions, the heat transfer coefficient of the pulsating heat exchanger 130 in this application can reach 2-5 times that of a traditional gravity heat pipe, exhibiting high heat transfer efficiency.

[0060] In one embodiment of this application, the pulsating heat spreader 130 includes a first connecting plate 134, a second connecting plate 135, and a third connecting plate 136, with heat conduction channels on the first connecting plate 134, the second connecting plate 135, and the third connecting plate 136 corresponding one-to-one. Specifically, the second connecting plate 135 is connected to both sides of the first connecting plate 134, and each second connecting plate 135 is connected to a third connecting plate 136. The angle between the first connecting plate 134 and the second connecting plate 135 ranges from 0 to 180 degrees, and the angle between the third connecting plate 136 and the second connecting plate 135 also ranges from 0 to 180 degrees. In other embodiments, the pulsating heat spreader may further include a fourth connecting plate. The number of connecting plates is not limited, meaning that the pulsating heat spreader 130 in this application can be bent multiple times. The specific number of bends and the bending angle (the angle between each connecting plate) are set according to the number and position of the heating elements.

[0061] Understandably, the pulsating vapor chamber in the embodiments of this application can dissipate heat from the heat-generating elements of electronic devices, such as power devices or processors. The pulsating vapor chamber is thermally connected to the heat-generating elements to transfer heat away. Specifically, the pulsating vapor chamber can be connected to a heat dissipation component to conduct heat to the heat dissipation component, such as a heat sink or a cold plate.

[0062] In this embodiment, there are two second connecting plates 135 and two third connecting plates 136. The extension directions of the first connecting plate 134 and the second connecting plate 135 form an angle of 90 degrees, and the extension directions of the third connecting plate 136 and the second connecting plate 135 also form an angle of 90 degrees. In a specific embodiment, the extension directions of the first connecting plate 134 and the third connecting plate 136 are the same, and the extension direction of the second connecting plate 135 intersects with the extension directions of the first connecting plate 134 and the third connecting plate 136. Each second connecting plate 135 is connected to a third connecting plate 136 at its bottom. That is, the pulsating heat spreader 130 is approximately in a "Z" shape.

[0063] The Z-shaped pulsating heat spreader 130 increases the heat transfer path, allowing heat to be transferred to external heat dissipation components via a first connecting plate 134, two second connecting plates 135, and two third connecting plates 136, achieving long-distance heat transfer, improving heat transfer efficiency, and ensuring heat conduction effect. In another embodiment of this application, the pulsating heat spreader 130 includes a first connecting plate 134, a second connecting plate 135, and a third connecting plate 136; the second connecting plate 135 is connected to the first connecting plate 134 and the third connecting plate 136, and the included angle between the first connecting plate 134 and the second connecting plate 135 is in the range of 0-180 degrees, as is the included angle between the third connecting plate 136 and the second connecting plate 135.

[0064] In this embodiment, there is one second connecting plate 135 and one third connecting plate 136. The angle between the extending directions of the first connecting plate 134 and the second connecting plate 135 is 90 degrees, and the angle between the extending directions of the third connecting plate 136 and the second connecting plate 135 is 90 degrees. In a specific embodiment, the extending directions of the first connecting plate 134 and the third connecting plate 136 are approximately the same, and the extending direction of the second connecting plate 135 intersects with the extending directions of the first connecting plate 134 and the third connecting plate 136. A second connecting plate 135 is connected to each side of the first connecting plate 134. A third connecting plate 136 is connected to the other side of the second connecting plate 135. That is, the pulsating heat spreader 130 is approximately Z-shaped.

[0065] The Z-shaped pulsating heat spreader can increase the heat transfer path. Heat can be transferred to the external heat dissipation components through a first connecting plate 134, a second connecting plate 135, and a third connecting plate 136, realizing long-distance heat transfer, improving heat transfer efficiency, and ensuring heat conduction effect.

[0066] In another embodiment of this application, the pulsating temperature equalizer 130 includes a first connecting plate 134 and a second connecting plate 135; the second connecting plate 135 is connected to the first connecting plate 134, and the included angle between the first connecting plate 134 and the second connecting plate 135 is in the range of 0-180 degrees.

[0067] In this embodiment, there is one first connecting plate 134 and two second connecting plates 135, and the included angle between the first connecting plate 134 and the second connecting plate 135 is greater than 90 degrees.

[0068] A second connecting plate 135 is connected to each of the two sides of the first connecting plate 134. The bottom of the second connecting plate 135 is thermally connected to the heat dissipation component 200. That is to say, the pulsating heat spreader 130 is roughly U-shaped.

[0069] The gate-shaped pulsating heat spreader 130 can increase the heat transfer path. Heat can be transferred to the external heat dissipation components through a first connecting plate 134 and a second connecting plate 135, realizing long-distance heat transfer, improving heat transfer efficiency, and ensuring heat conduction effect.

[0070] Optionally, the first connecting plate 134, the second connecting plate 135, and the third connecting plate 136 are an integral structure. The terms "first connecting plate," "second connecting plate," and "third connecting plate" are used for ease of description regarding the bent structure of the pulsating heat spreader. Of course, in other embodiments of this application, the pulsating heat spreader 130 may have other shapes, as long as it can conduct heat to external heat dissipation components.

[0071] Optionally, the connection points of the first connecting plate 134, the second connecting plate 135, and the third connecting plate 136 have a smooth or rounded transition.

[0072] In other embodiments of this application, the pulsating heat spreader 130 may further include a fourth connecting plate, a fifth connecting plate, etc. The number of connecting plates and the included angle between them are not limited, as long as the pulsating heat spreader 130 can conduct heat from the distant heating element to the external heat dissipation component. It should be particularly noted that the pulsating heat spreader 130 of this application allows for large-angle bending; for example, the included angle of each connecting plate can be greater than 90 degrees, making it suitable for applications with complex arrangement and number of heating elements.

[0073] join Figure 4 The heat conduction channel 131 is provided with an anti-clogging groove 137 around its perimeter. The distance between the anti-clogging groove 137 and the heat conduction channel 131 is less than or equal to 2 mm, which can prevent the working fluid of the heat conduction channel 131 from becoming blocked.

[0074] An anti-clogging groove 137 is formed between the first plate 132 and the second plate 133. The surface of the first plate 132 facing the second plate 133 has a plurality of first anti-clogging grooves, and the surface of the second plate 133 facing the first plate 132 has a plurality of second anti-clogging grooves. The first plate 132 is disposed on the second plate 133, and each first anti-clogging groove and each second anti-clogging groove surround the anti-clogging groove 137.

[0075] The lower surface of the first plate 132 has a plurality of recessed first anti-blocking grooves, and the upper surface of the second plate 133 has a plurality of recessed second anti-blocking grooves. The plurality of first anti-blocking grooves and the plurality of second anti-blocking grooves are arranged in a one-to-one correspondence. After the first plate 132 is disposed on the second plate 133, each first anti-blocking groove can form an anti-blocking groove 137 with the corresponding second anti-blocking groove.

[0076] Of course, in other embodiments of this application, a plurality of first anti-blocking grooves may be provided only on the surface of the first plate 132 facing the second plate 133, and the plurality of first anti-blocking grooves and the second plate 133 may form an anti-blocking groove 137. Alternatively, the surface of the second plate 133 facing the first plate 132 may have a plurality of second anti-blocking grooves, and the first plate 132 and the plurality of second anti-blocking grooves may form an anti-blocking groove 137.

[0077] Because the pulsating heat exchanger 130 has phase change heat transfer characteristics under anti-gravity conditions, it can be installed in any direction without affecting the heat transfer of the heat-generating element to the external heat dissipation components.

[0078] The heat transfer medium in the pulsating vapor chamber 130 undergoes both phase change heat transfer and oscillating flow heat transfer during the heat transfer process, resulting in higher heat transfer efficiency. Furthermore, by setting the equivalent diameter of the heat transfer channels 131, the heat transfer medium, the number of sub-channels 1311, and their spacing within the pulsating vapor chamber 130, phase change heat transfer under anti-gravity conditions can be achieved, improving heat dissipation efficiency and reducing costs. The pulsating vapor chamber 130 is formed using gas shielded welding, resulting in fast processing efficiency and reduced production costs. Moreover, the pulsating vapor chamber 130 of this application offers good structural flexibility, allowing for the inclusion of multiple angled connecting plates to dissipate heat from heating elements under complex operating conditions. For example, it can be applied to heat dissipation scenarios where multiple heating elements are dispersed, or where the distance between the heating elements and the heat dissipation components is significant.

[0079] All of the above-mentioned optional technical solutions can be combined in any way to form the optional embodiments of this application, and will not be described in detail here.

[0080] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pulsating temperature equalizer, characterized in that, The pulsating heat spreader includes a first plate and a second plate disposed opposite to each other; a heat-conducting channel is formed between the first plate and the second plate, the heat-conducting channel including a plurality of bent sub-channels, a first spacing between two adjacent sub-channels, and the ratio of the equivalent diameter of the heat-conducting channel to the first spacing is in the range of 0.5-2.

2. The pulsating temperature equalizer according to claim 1, characterized in that, The equivalent diameter of the heat-conducting channel is less than or equal to 2 mm.

3. The pulsating temperature equalizer according to claim 1, characterized in that, The first spacing is less than or equal to 2 mm.

4. The pulsating temperature equalizer according to claim 1, characterized in that, The heat-conducting channel is filled with a heat-conducting working fluid, which includes at least one of water, ethanol, acetone, chloroform or tetrafluoroethane, and ammonia.

5. The pulsating temperature equalizer according to claim 1, characterized in that, The pulsating heat spreader includes a first connecting plate and a second connecting plate that are connected to each other. The heat conduction channels on the second connecting plate correspond one-to-one with the heat conduction channels on the first connecting plate. The included angle between the first connecting plate and the second connecting plate is in the range of 0-180 degrees.

6. The pulsating temperature equalizer according to claim 5, characterized in that, A second connecting plate is connected to each of the two sides of the first connecting plate.

7. The pulsating temperature equalizer according to claim 5 or 6, characterized in that, The pulsating temperature equalizer also includes a third connecting plate connected to the second connecting plate; the included angle between the third connecting plate and the second connecting plate is in the range of 0-180 degrees.

8. The pulsating temperature equalizer according to claim 1, characterized in that, The number of sub-channels is greater than or equal to 10.

9. The pulsating temperature equalizer according to claim 1, characterized in that, The heat conduction channel is surrounded by anti-clogging grooves.

10. The pulsating temperature equalizer according to claim 9, characterized in that, The distance between the anti-clogging groove and the heat-conducting channel is less than or equal to 2 mm.

11. The pulsating temperature equalizer according to claim 1, characterized in that, The pulsating temperature distribution plate is made of aluminum alloy, stainless steel or copper.

12. The pulsating temperature equalizer according to claim 4, characterized in that, The thermally conductive working fluid accounts for 30%-60% of the thermally conductive flow channel.

13. The pulsating temperature equalizer according to claim 1, characterized in that, The first plate and the second plate are welded together by gas shielded welding to form a sealed cavity, and a heat conduction channel is provided in the sealed cavity.

14. The pulsating temperature equalizer according to claim 1, characterized in that, The surface of the first plate facing the second plate has a plurality of first flow channel grooves, and the surface of the second plate facing the first plate has a plurality of second flow channel grooves; Each of the first flow channel grooves and each of the second flow channel grooves forms the heat-conducting flow channel.

15. The pulsating temperature equalizer according to claim 1, characterized in that, The surface of the first plate facing the second plate has a plurality of first flow channel grooves, or the surface of the second plate facing the first plate has a plurality of second flow channel grooves; Each of the first flow channel grooves and the second plate body surrounds the heat-conducting flow channel, or the first plate body and each of the second flow channel grooves surround the heat-conducting flow channel.

16. The pulsating temperature equalizer according to any one of claims 14 or 15, characterized in that, Both the first channel groove and the second channel groove of the heat-conducting channel are etched grooves.

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