Fin assembly and evaporator thereof

Abstract

The present application discloses a fin assembly and an evaporator thereof, the fin assembly includes at least one first fin and at least one second fin, the first fin and the second fin are overlapped, the first fin includes a first tooth seat and a plurality of first teeth spaced apart along the longitudinal direction of the first tooth seat, the second fin includes a second tooth seat and a plurality of second teeth spaced apart along the longitudinal direction of the second tooth seat, the first teeth and the second teeth are arranged intersecting to form an intersecting fluid passage between the first fin and the second fin. The fin assembly of the present application can solve the problem of low heat exchange efficiency of the heat dissipation structure of a conventional heat sink.

Description

[Technical field]

[0001] This application claims priority to a Chinese patent application filed with the China Patent Office on May 26, 2022, bearing application number 202221292575.1 and entitled "Fin Assembly and Evaporator Thereof", the entire contents of which are incorporated herein by reference.

[0002] The present application relates to the field of heat dissipation technology, and in particular to a fin assembly and an evaporator thereof. [Background technology]

[0003] At present, the power consumption of electronic devices such as system servers is increasing, and without a design to dissipate heat, they are prone to failure and even burn out. Therefore, heat dissipation products are provided for these electronic devices.

[0004] Current heat dissipation products have begun to shift from traditional air-cooled modules to siphon radiators. However, the heat dissipation structure of the evaporator of the traditional siphon radiator has low heat exchange efficiency and cannot meet the needs of high-power electronic devices. Summary of the Invention [Problem to be solved by the invention]

[0005] The present application provides a fin assembly and an evaporator thereof to solve the problem of low heat exchange efficiency of the heat dissipation structure of a conventional radiator. [Means for solving the problem]

[0006] According to a first aspect of the present application, the present application provides a fin assembly, comprising at least one first fin and at least one second fin, the first fin and the second fin being overlapped; the first fin includes a first tooth seat and a plurality of first tooth pieces spaced apart along a longitudinal direction of the first tooth seat, the second fin includes a second tooth seat and a plurality of second tooth pieces spaced apart along a longitudinal direction of the second tooth seat, The first tines and the second tines are interdigitated to define an interdigitated fluid passage between the first fins and the second fins.

[0007] In a possible design, there is a first gap between two adjacent first teeth and a second gap between two adjacent second teeth, the first gaps and the second gaps being interleaved.

[0008] In a possible design, the first tines are aligned with the second gaps and the second tines are aligned with the first gaps to form intersecting fluid passages between the first fin and the second fin.

[0009] In a possible design, the width of the first tooth piece is smaller than the width of the second gap, and the width of the second tooth piece is smaller than the width of the first gap.

[0010] In a possible design, a fluid passage is formed between adjacent first and second teeth.

[0011] In a possible design, the width of the first tooth piece is equal to the width of the second tooth piece, and the width of the first gap is equal to the width of the second gap.

[0012] In a possible design, the first tooth seat is provided with a first press point and the second tooth seat is provided with a second press point matching the first press point.

[0013] In a possible design, the number of first press points is three, two of the first press points are located at both ends of the first tooth seat and one of the first press points is located at a middle position of the first tooth seat, and the number of second press points is three, two of the second press points are located at both ends of the second tooth seat and one of the second press points is located at a middle position of the second tooth seat.

[0014] In a possible design, both the first fin and the second fin are flexible fins.

[0015] According to a second aspect of the present application, the present application further provides an evaporator, The fin assembly described above; a base plate including a first side for contacting a heat source and a second side to which the fin assembly is attached; Includes.

[0016] The beneficial effects of the present application include at least the following: The first and second teeth of the fin assembly of the present application are arranged in an interlaced manner, so that the residual heat can not only be diffused outward along the height direction of the first tooth seat, but also can be locally transferred within the interlaced fluid passage. The fin assembly has the first and second fins overlapped and arranged in an interlaced manner, so that the heat exchange surface area of ​​the working medium can be increased, and the ability to absorb residual heat is improved. When the power of the heat source is increased, the working medium boils and bubbles are generated, and the bubbles come into contact with the fin surface to perform phase change heat exchange, so that the electronic device product can perform phase change heat exchange in a higher power consumption environment. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a schematic diagram of a typical fin structure attached to a base plate in the prior art. [Diagram 2] FIG. 1 is a schematic diagram of a conventional technique for attaching a second-removal structure to a bottom plate. [Diagram 3] FIG. 2 is a schematic diagram of the attachment of the fin assembly of the present application to the base plate. [Figure 4] FIG. 4 is an enlarged view of a portion A in FIG. [Diagram 5] FIG. 2 is a partially exploded view of a first fin and a second fin in the fin assembly of the present application. [Figure 6] FIG. 2 is a schematic diagram showing the configuration of a first fin in the fin assembly of the present application. [Figure 7] FIG. 2 is a schematic diagram showing the configuration of a second fin in the fin assembly of the present application. [Figure 8] FIG. 2 is a schematic diagram of a configuration of one embodiment of a fin assembly of the present application.

[0018] The drawings described herein are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application, and together with the specification serve to explain the principles of the present application. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] In order to make the technical solution of the present application better understand, the following embodiments of the present application are described in detail in conjunction with the drawings.

[0020] It should be clear that the described embodiments are only a part of the embodiments of the present application, and are not all of the embodiments. Based on the embodiments in the present application, all other embodiments that can be obtained by a person skilled in the art without requiring creative efforts all belong to the protection scope of the present application.

[0021] The terms used in the examples of this application are merely for the purpose of describing particular examples and are not intended to limit the present application. As used in the examples of this application and the appended claims, the singular forms "a," "said," and "this" are intended to include the plural forms unless the context clearly dictates otherwise.

[0022] It should be understood that the term "and / or" used in this document is merely to describe a relational relationship between related objects, and represents that three relations may exist, for example, A and / or B can represent three situations: only A exists, A and B exist simultaneously, and only B exists. Also, the symbol " / " in this document generally represents that the related objects before and after are in an "or" relationship.

[0023] It should be noted that directional terms such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described according to the angles shown in the drawings and should not be understood as limiting the embodiments of the present application. It should be understood that when the context refers to an element being connected "upper" or "lower" to another element, it may be directly connected to the "upper" or "lower" of the other element, or indirectly connected to the "upper" or "lower" of the other element via an intermediate element.

[0024] Conventional evaporator heat dissipation structures of radiators for electronic devices such as servers mainly include a general fin structure and a cut-in structure, and furthermore, as shown in Fig. 1, the general fin structure 3 is welded to the bottom plate 2' of the evaporator, which has a large fin pitch, a small surface area in contact with the liquid, and a low heat exchange efficiency, which cannot meet the needs of high-power electronic devices. As shown in Fig. 2, the cut-in structure 4 is welded to the bottom plate 2' of the evaporator, and the evaporator with such a structure has the disadvantages that it is difficult to make the cut-in into a flow path structure that meets the needs of the product, the processing process is complicated, the mass production is low, and the mass production cost is high.

[0025] In response to problems such as poor heat exchange efficiency, complicated processing, and high cost of conventional evaporator heat dissipation structures, an embodiment of the present application provides a fin assembly applicable to an evaporator of a heat sink for heat dissipation of electronic devices, including but not limited to servers.

[0026] An embodiment of the present application provides an evaporator, as shown in Figures 3 and 4, which includes a fin assembly 1 and a base plate 2, and the base plate 2 includes a first side 201 for contacting a heat source and a second side 202 to which the fin assembly 1 is attached.

[0027] An embodiment of the present application provides a fin assembly, and as shown in Figures 3 to 5, the fin assembly 1 includes at least one first fin 11 and at least one second fin 12, and the first fin 11 and the second fin 12 are overlapped.

[0028] The first fin 11 includes a first tooth seat 111 and a plurality of first tooth pieces 112 arranged at intervals along the longitudinal direction of the first tooth seat 111. The second fin 12 includes a second tooth seat 121 and a plurality of second tooth pieces 122 arranged at intervals along the longitudinal direction of the second tooth seat 121.

[0029] The first teeth 112 and the second teeth 122 are interdigitated to form interdigitated fluid passages between the first fin 11 and the second fin 12 .

[0030] The fin assembly 1 of this embodiment includes at least one first fin 11 and at least one second fin 12, the first fin 11 and the second fin 12 are alternately connected, and the connection method can be pressing, thus greatly reducing the manufacturing cost. The first fin 11 includes a first tooth seat 111 and a plurality of first teeth 112, the longitudinal section of the first teeth 112 can be rectangular, square, trapezoidal, triangular or wavy, etc., and in some specific embodiments, the longitudinal section of the first teeth 112 is rectangular, and the plurality of first teeth 112 are spaced apart along the longitudinal direction of the first teeth seat 111, and when the fin assembly 1 is attached to the second side 202 of the bottom plate 2, one end of the first teeth seat 111 away from the first teeth 112 is connected to the bottom plate 2. The second fin 12 includes a second tooth seat 121 and a plurality of second tooth pieces 122, and the longitudinal cross section of the second tooth piece 122 may be rectangular, square, trapezoidal, triangular or wavy, etc., and in some specific embodiments, the longitudinal cross section of the second tooth piece 122 is rectangular, and the plurality of second tooth pieces 122 are spaced apart along the longitudinal direction of the second tooth seat 121, and when the fin assembly 1 is attached to the second side 202 of the bottom plate 2, one end of the second tooth seat 121 away from the second tooth piece 122 is connected to the bottom plate 2. The first tooth 112 and the second tooth 122 are arranged to intersect with each other to form an intersecting fluid passage between the first fin 11 and the second fin 12, and the first tooth 112 and the second tooth 122 are arranged to intersect with each other, so that the residual heat can not only be diffused outward along the height direction of the first tooth seat 111, but also can be locally transferred within the intersecting fluid passage. The fin assembly 1 overlaps at least one of the first fins 11 and at least one of the second fins 12, and the first tooth 112 and the second tooth 122 are arranged to intersect with each other, so that the heat exchange surface area of ​​the working medium can be increased, and the ability to absorb residual heat is improved. When the power of the heat source is increased, the working medium boils and bubbles are generated, and the bubbles come into contact with the fin surface to perform phase change heat exchange, and thus the electronic device product can perform phase change heat exchange in a higher power consumption environment, and the Q value of the product reaches a higher range.In addition, the configuration of the fin assembly in this embodiment is simple, the manufacturing process is simple, and parameters such as the sizes of the first tooth piece 112 and the second tooth piece 122 can be accurately adjusted according to actual needs, which increases the part options and provides different efficacy data, thereby improving the overall efficacy of the product.

[0031] In some specific embodiments, as shown in FIG. 6, a first gap 1120 is provided between two adjacent first teeth 112, and as shown in FIG. 7, a second gap 1220 is provided between two adjacent second teeth 122, and the first gap 1120 and the second gap 1220 are arranged in an intersecting manner.

[0032] In this embodiment, by having a first gap 1120 between two adjacent first teeth 112 and a second gap 1220 between two adjacent second teeth 122, the first gap 1120 and the second gap 1220 are limited to being arranged in an intersecting manner, which can make the intersecting path of the fluid passage more complex, further increase the heat exchange surface area of ​​the working medium, and improve the ability to absorb excess heat.

[0033] In some specific embodiments, the first tooth 112 is aligned with the position of the second gap 1220 and the second tooth 122 is aligned with the position of the first gap 1120 so as to form an intersecting fluid passage between the first fin 11 and the second fin 12.

[0034] In this embodiment, the first tooth 112 is positioned to align with the position of the second gap 1220, and the second tooth 122 is positioned to align with the position of the first gap 1120, thereby making the intersecting path of the fluid passages more tortuous, thereby further increasing the heat exchange surface area of ​​the working medium and improving the ability to absorb excess heat.

[0035] In some specific embodiments, the width of the first tooth piece 112 is smaller than the width of the second gap 1220 and the width of the second tooth piece 122 is smaller than the width of the first gap 1120 .

[0036] In this embodiment, the width of the first tooth 112 is limited to be smaller than the width of the second gap 1220, and the width of the second tooth 122 is limited to be smaller than the width of the first gap 1120. In this way, when the liquid flows through the intersecting fluid passages, it can bypass both ends of the first tooth 112 and both ends of the second tooth 122 and enter the second gap 1220 and the first gap 1120, thus further increasing the heat exchange surface area of ​​the working medium and enhancing the ability to absorb excess heat.

[0037] In some specific embodiments, the width of the first tooth piece 112 is equal to the width of the second tooth piece 122, and the width of the first gap 1120 is equal to the width of the second gap 1220. A fluid passage is formed between adjacent first tooth pieces 112 and second tooth pieces 122.

[0038] In this embodiment, the width of the first tooth 112 is limited to be equal to the width of the second tooth 122, and the width of the first gap 1120 is limited to be equal to the width of the second gap 1220, thus ensuring that the intersecting fluid passages have consistent sizes at different intersecting positions, and further ensuring that the liquid has a uniform flow rate in the intersecting fluid passages, thereby improving the heat exchange efficiency.

[0039] In some specific embodiments, the first tooth seat 111 is provided with one or more first press points 1111, and the second tooth seat 121 is provided with one or more second press points 1211 matching the first press points 1111.

[0040] In this embodiment, one or more first press points 1111 are provided on the first tooth seat 111, and one or more second press points 1211 matching the first press points 1111 are provided on the second tooth seat 121, thereby realizing press molding between the first fin 11 and the second fin 12, thereby significantly reducing production costs and improving production efficiency.

[0041] In some specific embodiments, the number of the first press points 1111 is three, of which two of the first press points 1111 are located at both ends of the first tooth seat 111, and one of the first press points 1111 is located at the middle position of the first tooth seat 111; the number of the second press points 1211 is three, of which two of the second press points 1211 are located at both ends of the second tooth seat 121, and one of the second press points 1211 is located at the middle position of the second tooth seat 121.

[0042] In this embodiment, the number of first press points 1111 and second press points 1211 are both limited to three, and the three first press points 1111 are respectively installed at both ends and the middle position of the first tooth seat 111, and the three second press points 1211 are respectively installed at both ends and the middle position of the second tooth seat 121, thereby ensuring the stability of the structure after press-molding of the first fin 11 and the second fin 12, improving the strength of the structure of the fin assembly 1, and extending the life of the heat dissipation structure.

[0043] In some specific embodiments, both the first fin 11 and the second fin 12 are flexible fins.

[0044] In this embodiment, the first fin 11 and the second fin 12 are flexible fins, which allows the fins to be folded freely, forming a capillary structure. Furthermore, by increasing the effect of capillary force, the thermal resistance is reduced, and the heat exchange efficiency is improved.

[0045] In some specific embodiments, as shown in FIG. 8 , the fin assembly 1 further includes a flat plate 13, one side of which is connected to one end of the first tooth seat 111 and the other side of which is connected to the bottom plate 2.

[0046] In this embodiment, the fin assembly 1 further includes a flat plate 13, and when mounted, one side of the flat plate 13 is connected to one end of the first tooth seat 111 and the other side is welded to the second side 202 of the bottom plate 2 by soldering or aluminum brazing, thereby more stably attaching the fin assembly 1 to the bottom plate 2.

[0047] In some specific embodiments, the first fin 11 and the second fin 12 have respective roughened surfaces.

[0048] In this embodiment, the first fin 11 and the second fin 12 can be independently shot blasted, wire drawn and polished to give them a rough surface, thereby increasing the roughness of their surfaces, enlarging the heat exchange area and improving the heat exchange efficiency.

[0049] The above is only a preferred embodiment of the present application, and does not limit the present application. Those skilled in the art can make various modifications and variations to the present application. Any amendments, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application. [Explanation of symbols]

[0050] 1···Fin assembly; 11 ···First fin; 111 - first tooth seat; 1111...first press point; 112 First tooth piece; 1120 ···First gap; 12 ···Second fin; 121... second tooth seat; 1211 ···Second press point; 122 ···Second tooth piece; 1220 ···Second gap; 13...Flat plate; 2, 2'...bottom plate; 201 ···first side; 202...second side; 3 General fin structure; 4. Second-pass structure.

Claims

1. a fin assembly including at least one first fin and at least one second fin, the first fin and the second fin being overlapped; The first fin includes a first tooth seat and a plurality of first teeth arranged at intervals along a longitudinal direction of the first tooth seat, The second fin includes a second tooth seat and a plurality of second teeth spaced apart along a longitudinal direction of the second tooth seat, A fin assembly, characterized in that the first fin and the second fin are arranged in an intersecting manner to form an intersecting fluid passage between the first fin and the second fin.

2. 2. The fin assembly according to claim 1, wherein a first gap is provided between two adjacent first teeth, a second gap is provided between two adjacent second teeth, and the first gap and the second gap are arranged in an intersecting manner.

3. 3. The fin assembly of claim 2, wherein the first teeth are aligned with the position of the second gap and the second teeth are aligned with the position of the first gap so as to form an intersecting fluid passage between the first fin and the second fin.

4. The fin assembly of claim 2 , wherein a width of the first tine is smaller than a width of the second gap, and a width of the second tine is smaller than a width of the first gap.

5. The fin assembly according to claim 4 , wherein the fluid passage is formed between adjacent first and second teeth.

6. 5. The fin assembly of claim 4, wherein a width of the first tine is equal to a width of the second tine, and a width of the first gap is equal to a width of the second gap.

7. 2. The fin assembly of claim 1, wherein the first tooth seat has a first press point and the second tooth seat has a second press point that matches the first press point.

8. The fin assembly of claim 7, wherein the number of the first press points is three, two of the first press points being located at both ends of the first tooth seat and one of the first press points being located at an intermediate position of the first tooth seat, and the number of the second press points is three, two of the second press points being located at both ends of the second tooth seat and one of the second press points being located at an intermediate position of the second tooth seat.

9. The fin assembly of claim 1 , wherein the first fin and the second fin are both flexible fins.

10. An evaporator comprising: A fin assembly according to any one of claims 1 to 9; a base plate including a first side for contacting a heat source and a second side to which the fin assembly is attached; An evaporator comprising:

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