Pulsating heat pipe end sealing structure and pulsating heat pipe radiator

Abstract

This invention discloses a pulsating heat pipe end-sealing structure and a pulsating heat pipe radiator. The structure includes a microchannel parallel tube, a first end cap, a second end cap, and a third end cap. The first and second end caps are respectively connected to the two ends of the microchannel parallel tube, and the third end cap is connected to the second end cap. The microchannel parallel tube has multiple parallel partitions inside, which alternately connect to the first and second end caps, forming multiple interconnected flow channels between them. The second end cap has two connecting holes at each end, simultaneously connecting to the flow channels and the third end cap. The third end cap also has process holes. This invention's pulsating heat pipe end-sealing structure and pulsating heat pipe radiator form interconnected internal flow channels through the combination of three end caps. The end caps are manufactured using stamping, die casting, or cold forging processes, resulting in high processing efficiency and low cost, enabling large-scale production and the industrialization of pulsating heat pipes.

Description

Technical Field

[0001] This invention relates to the field of radiators, and particularly to a pulsating heat pipe end sealing structure and a pulsating heat pipe radiator. Background Technology

[0002] Pulsating heat pipes are a commonly used type of pipe and are frequently mentioned in various patents. For example, patent CN203148276U describes a parallel-flow pulsating heat pipe with a serpentine arrangement, and patent CN203215636 proposes a scheme to enhance heat dissipation by adding fins between parallel-flow pulsating heat pipes. However, the descriptions of how to connect the internal pipes of the parallel pipes to form a single flow channel in the above patents are unclear, making actual implementation and manufacturing difficult, and thus hindering the large-scale market application of parallel-flow pulsating heat pipes. Summary of the Invention

[0003] To address the above problems, the present invention provides a pulsating heat pipe end sealing structure and a pulsating heat pipe radiator.

[0004] According to one aspect of the present invention, a pulsating heat pipe end sealing structure is provided, comprising a microchannel parallel tube, a first end cap, a second end cap, and a third end cap, wherein the first end cap and the second end cap are respectively connected to both ends of the microchannel parallel tube, and the third end cap is connected to the second end cap; wherein the interior of the microchannel parallel tube has a plurality of parallel partitions, each partition being alternately connected to the first end cap and the second end cap, and forming a plurality of interconnected flow channels between the partitions; both ends of the second end cap have two connection holes that simultaneously communicate with the flow channels and the third end cap, and the third end cap has process holes.

[0005] In some embodiments, the first end cap, the second end cap, and the third end cap are all connected to the microchannel parallel tube by welding or gluing. This describes the connection method between each end cap and the microchannel parallel tube.

[0006] In some embodiments, the inner sides of both the first end cap and the second end cap have multiple alternating recessed grooves and protrusions, each protrusion being connected to a respective partition wall. Thus, a partial description of the specific structure of the first and second end caps has been provided.

[0007] In some embodiments, each of the protrusions is connected to each of the partition walls by welding or gluing. Thus, the connection method between the first end cap and the second end cap and the partition wall is described.

[0008] In some embodiments, the two connecting holes are respectively connected to two flow channels located on both sides of the microchannel parallel tube. This describes the specific location where the connecting holes connect to the flow channels.

[0009] In some embodiments, the third end cap has a communicating groove that communicates with each of the connecting holes and the process holes.

[0010] According to one aspect of the present invention, a pulsating heat pipe radiator using the above-described pulsating heat pipe end sealing structure is provided, wherein the microchannel parallel tube is in a serpentine shape with multiple bends, and multiple fins are distributed and installed between each bend.

[0011] In some embodiments, a plurality of the fins are mounted on one end of the microchannel parallel tube, and the other end is in contact with a metal block. Thus, the metal block allows heat from the electronic device to be transferred to a pulsating heat pipe radiator for heat dissipation.

[0012] The present invention provides a pulsating heat pipe end sealing structure and a pulsating heat pipe radiator, which simplifies the internal connection method of microchannel parallel tubes by using end cap structure. The internal flow channel is connected by the combination of three end caps. The end caps are made by stamping, die casting or cold forging processes, which have high processing efficiency and low cost, and respectively realize large-scale production and industrialization of pulsating heat pipes. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the end sealing structure of a pulsating heat pipe according to one embodiment of the present invention;

[0014] Figure 2 for Figure 1 A schematic diagram of the bottom structure of the end sealing structure of the pulsating heat pipe shown.

[0015] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure along the AA direction;

[0016] Figure 4 for Figure 1 Partial structural schematic diagram of the cross-sectional structure shown Figure 1 ;

[0017] Figure 5 for Figure 1 Partial structural schematic diagram of the cross-sectional structure shown Figure 2 ;

[0018] Figure 6 For application Figure 1 The diagram shows the structure of a pulsating heat pipe radiator with a sealing structure at the end of the pulsating heat pipe.

[0019] In the figure: parallel tube 1, first end cap 2, second end cap 3, third end cap 4, partition wall 5, flow channel 6, connecting hole 7, process hole 8, sinking groove 9, protrusion 10, connecting groove 11, fin 12, metal block 13. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings.

[0021] Figure 1 The diagram schematically illustrates the structure of a pulsating heat pipe end sealing structure according to one embodiment of the present invention. Figure 2 Showing Figure 1 Bottom view of the end sealing structure of the pulsating heat pipe in the image. Figure 3 Showing Figure 2 The cross-sectional structure along the AA direction in the middle. Figure 4 Showing Figure 3 A cross-sectional structure of one part of it. Figure 5 Showing Figure 3 The cross-sectional structure of another part of it. For example... Figure 1-5 As shown, the sealing structure includes a microchannel parallel tube 1, with a first end cap 2 installed at one end of the microchannel parallel tube 1, and a second end cap 3 and a third end cap 4 installed at the other end, with the third end cap 4 also connected to the second end cap 3.

[0022] Preferably, the inner cross-section hole of the microchannel parallel tube 1 can be rectangular, square, circular, triangular, trapezoidal, or other polygonal shapes, with a diameter generally between 0.3 and 3 mm.

[0023] Preferably, the microchannel parallel tube 1 and the first end cap 2, the second end cap 3 and the third end cap 4 are manufactured by stamping, die casting or cold forging processes and are connected to each other by welding or gluing.

[0024] The microchannel parallel tube 1 contains multiple partitions 5, which are parallel to each other and approximately equidistant from each other, thus creating multiple flow channels 6 between them. Each partition 5 is alternately connected to a first end cap 2 and a second end cap 3; that is, if one end of a partition 5 is connected to the first end cap 2 and the other end is not connected to the second end cap 3, then the other ends of the two adjacent partitions 5 are connected to the second end cap 3, while the first end is not connected to the first end cap 2. Therefore, all flow channels 6 are interconnected and can share a relatively long channel.

[0025] Specifically, both the first end cap 2 and the second end cap 3 have multiple alternating recessed grooves 9 and protruding protrusions 10 on their inner sides. That is, each recessed groove 9 has a protrusion 10 on both sides, and each protrusion 10 has a recessed groove 9 on both sides. Each protrusion 10 is connected to the end of each partition wall 5. The distance between each adjacent recessed groove 9 and protrusion 10 is equal to the distance between each adjacent partition wall 5. That is, if one end of a partition wall 5 is installed at a protrusion 10 of the first end cap 2 and the other end is located at a recessed groove 9 of the second end cap 3, then one end of its adjacent partition wall 5 is installed at a protrusion 10 of the second end cap 3 and the other end is located at a recessed groove 9 of the first end cap 2.

[0026] Preferably, each protrusion 10 is connected to each partition wall 5 by welding or gluing.

[0027] The second end cap 3 has two connecting holes 7 at each end. One side of each connecting hole 7 is connected to two flow channels 6 located on both sides of the microchannel parallel tube 1, and the other side is connected to the third end cap 4. The third end cap 4 has a recessed connecting groove 11, which is connected to the two connecting holes 7.

[0028] The third end cap 4 also has a process hole 8, which is connected to the connecting groove 11. Vacuuming and filling of the working medium can be performed through the process hole 8. Then the process hole 8 is sealed, and the working medium flows in each flow channel 6 to form a pulsating heat pipe.

[0029] Preferably, the working medium is generally selected from water, ethanol, acetone, ammonia, and Freon, and its liquid filling volume is generally 30% to 80% of the internal volume of the microchannel parallel tube 1.

[0030] Figure 6 It shows that the application was used. Figure 1 The structure of the pulsating heat pipe radiator with a sealing structure at the end of the pulsating heat pipe is shown. (Example:) Figure 6 As shown, in this heat sink, the microchannel parallel tube 1 can be set into a serpentine shape with multiple bends (or a straight tube depending on the actual situation), vacuumed and filled with working medium to form a pulsating heat pipe, and multiple fins 12 are distributed and installed between its bends to improve its heat dissipation capacity.

[0031] In addition, multiple fins 12 (which are heat dissipation ends) can be installed at one end of the microchannel parallel tube 1, and the other end can be in contact with a metal block 13 (which is heat absorption end). One side of the metal block 13 is in contact with the heat dissipation surface of the electronic device, and the other side is in contact with the microchannel parallel tube 1. Grooves can be opened on this side according to the specific shape of the microchannel parallel tube 1 for placement and contact.

[0032] Therefore, the heat generated by the electronic device can be transferred through the metal block 13 to the pulsating heat pipe formed by the microchannel parallel tube 1, and then carried away and dissipated by the air flow between the pulsating heat pipe and the fins 12, thereby achieving the purpose of heat dissipation of the electronic device.

[0033] The above descriptions are merely some embodiments of the present invention. Those skilled in the art can make various modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A pulsating heat pipe end sealing structure, characterized in that: The device includes a microchannel parallel tube (1), a first end cap (2), a second end cap (3), and a third end cap (4). The first end cap (2) and the second end cap (3) are respectively connected to the two ends of the microchannel parallel tube (1), and the third end cap (4) is connected to the second end cap (3). The microchannel parallel tube (1) has multiple parallel partitions (5) inside, and each partition (5) is alternately connected to the first end cap (2) and the second end cap (3), forming multiple channels between each partition (5). The connected flow channels (6) have two connecting holes (7) at both ends of the second end cap (3) that are connected to the flow channels (6) and the third end cap (4) respectively. The two connecting holes (7) are connected to the two flow channels (6) located on both sides of the microchannel parallel tube (1). The third end cap (4) has a process hole (8). The inner sides of the first end cap (2) and the second end cap (3) have multiple alternating sink grooves (9) and protrusions (10). Each protrusion (10) is connected to each partition wall (5).

2. The pulsating heat pipe end sealing structure according to claim 1, characterized in that: The first end cap (2), the second end cap (3) and the third end cap (4) are all connected to the microchannel parallel tube (1) by welding or gluing.

3. The pulsating heat pipe end sealing structure according to claim 1, characterized in that: Each of the protrusions (10) is connected to each of the partition walls (5) by welding or gluing.

4. The pulsating heat pipe end sealing structure according to claim 1, characterized in that: The third end cap (4) has a connecting groove (11), which is connected to each of the connecting holes (7) and the process holes (8).

5. A pulsating heat pipe radiator employing the pulsating heat pipe end sealing structure according to any one of claims 1-4, characterized in that: The microchannel parallel tube (1) is in the shape of a snake with multiple bends, and multiple fins (12) are distributed between each bend.

6. A pulsating heat pipe radiator according to claim 5, characterized in that: One end of the microchannel parallel tube (1) is fitted with a plurality of fins (12), and the other end is in contact with a metal block (13).

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