Bidirectional heat dissipation module and heat conduction gel screen printing jig on bidirectional heat dissipation module

Abstract

The utility model discloses a bidirectional heat dissipation module and a heat conduction gel screen printing jig on the bidirectional heat dissipation module, the bidirectional heat dissipation module comprises a heat absorption unit, two groups of heat conduction flat tubes and two groups of heat dissipation fin groups, and the heat absorption unit is provided with a phase change heat conduction sheet and heat conduction gel; the screen printing jig comprises a base, a turning cover and a scraping plate, the turning cover is provided with a containing groove used for containing heat conduction glue, and the containing groove is provided with glue outlet groove holes corresponding to the heat conduction gel to be attached in position, number and shape. Heat can be efficiently conducted out of a system through the two heat conduction flat pipe heat dissipation fin sets, the phase change heat conduction pieces are arranged on the main heat source, the heat conduction gel is arranged on the secondary heat source, heat conduction is guaranteed, and meanwhile the production cost of products is reduced. In addition, the provided screen printing jig is simple in structure and high in efficiency, can attach heat-conducting gels of different shapes and positions at a time, and ensures unification of attaching states and product quality.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation modules, in particular to a built-in bidirectional heat dissipation module of a notebook computer and a screen printing jig for heat-conducting gel thereon. Background Art

[0002] With the advancement of electronics technology, the transistor density of various chips is increasing. As data processing speeds accelerate, the heat generated is also increasing. To ensure stable operation of circuit board chips, high-efficiency heat sinks have become an inevitable requirement.

[0003] Currently, thermal conductive phase change materials are attached to the areas of the heat sink that contact the chips, capacitors, and other heat sources on the circuit board to guide the heat source to the heat pipe and transport the hot air flow to the outside of the system through the heat sink fins by blowing the fan. Thermal conductive phase change materials are expensive due to their high thermal conductivity. However, using thermal conductive phase change materials at non-primary heat sources results in cost waste. Therefore, it is necessary to select thermal conductive materials with different thermal conductivity coefficients for different heat sources to avoid cost waste and meet the needs of efficient heat dissipation. Summary of the Invention

[0004] In order to overcome the above-mentioned defects, the utility model provides a bidirectional heat dissipation module and a thermal conductive gel screen printing jig thereon, which reduces the production cost of the heat dissipation module while meeting the requirements of efficient heat dissipation.

[0005] The first technical solution adopted by the present invention to solve the technical problem is to provide a bidirectional heat dissipation module, including:

[0006] The heat absorption unit includes a primary heat absorption sheet and multiple secondary heat absorption sheets. The bottom surface of the primary heat absorption sheet is provided with a phase change heat conductive sheet for heat exchange with the computer chip. The bottom surfaces of the multiple secondary heat absorption sheets are respectively provided with a heat conductive gel with a specific shape for heat exchange with the secondary heat source.

[0007] Two heat-conducting flat tubes are configured, each having a heat-absorbing portion, a heat-dissipating portion, and a bent portion integrally connecting the heat-absorbing portion and the heat-dissipating portion. The heat-absorbing portions of the two heat-conducting flat tubes are arranged side by side and positioned on the upper surface of the first-level heat-absorbing fin, so that the two heat-dissipating portions are arranged oppositely on either side of the first-level heat-absorbing fin. A plurality of second-level heat-absorbing fins are arranged on the heat conduction paths of the two heat-conducting flat tubes.

[0008] The heat dissipation fin group is configured into two groups and is respectively arranged on the heat dissipation part of the two heat-conducting flat tubes. The heat dissipation fin group is spliced ​​by multiple "]"-shaped heat dissipation fins arranged side by side, and forms multiple heat dissipation ducts arranged in parallel and arranged along the width direction of the heat dissipation part. The two sides of the heat dissipation duct are respectively an air inlet and an air outlet.

[0009] As a further improvement of the present invention, the first-level heat absorbing sheet has a positioning portion for positioning the heat absorbing portions of the two heat-conducting flat tubes, and two first connecting portions and second connecting portions arranged parallel to the extending direction of the heat absorbing portions and respectively placed on both sides of the positioning portion;

[0010] The first connecting portion is formed to extend outwardly along the horizontal direction of the positioning portion, and both ends of the first connecting portion are bent upward and extended to form two first connecting ears;

[0011] The second connecting portion is connected to the positioning portion via an upwardly bent limiting portion, and both ends of the second connecting portion are bent downwardly and extended to form two second connecting ears.

[0012] The two first connecting ears and the two second connecting ears are both provided with connecting holes for embedding common connecting bolts.

[0013] As a further improvement of the present invention, a rectangular avoidance slot is provided on one side of the positioning portion close to the limiting portion, and the phase change heat conductive sheet is adhered to the bottom surface of the positioning portion and the bottom surface between the two second connecting ears of the second connecting portion;

[0014] Rectangular insulating sheets are respectively attached to the bottom surfaces of both ends of the positioning portion in the width direction.

[0015] As a further improvement of the present invention, the two heat-conducting flat tubes are respectively defined as a first heat-conducting flat tube and a second heat-conducting flat tube.

[0016] The secondary heat absorbing sheets are configured in four pieces, including:

[0017] A secondary heat absorbing sheet A is provided on a side of the second connecting portion away from the positioning portion, and a flat square thermal conductive gel is attached to the bottom surface of the secondary heat absorbing sheet A;

[0018] A secondary heat absorbing sheet B is provided between the first and second connecting ears on the corresponding side. The top surface of the secondary heat absorbing sheet B is respectively connected to the curved portion of the first heat-conducting flat tube and the heat-absorbing portion of the second heat-conducting flat tube, and the bottom surface of the secondary heat absorbing sheet B is affixed with a flat rectangular heat-conducting gel.

[0019] A secondary heat absorbing sheet C is provided at the end of the heat absorbing portion of the first heat-conducting flat tube, and a flat rectangular heat-conducting gel is attached to the bottom surface of the secondary heat absorbing sheet C;

[0020] The secondary heat absorbing sheet D is provided on the bottom surface of one end of the bending portion of the first heat-conducting flat tube close to its heat dissipation portion. The bottom surface of the secondary heat absorbing sheet D is adhered with a flat L-shaped heat-conducting gel.

[0021] As a further improvement of the present invention, a curved insulating sheet having the same shape as the curved portion of the first heat-conducting flat tube is provided on the bottom surface of the curved portion.

[0022] As a further improvement of the present invention, the heat dissipation fin group is formed by splicing heat dissipation fins of two different lengths to form a plurality of notches for positioning on one side of the air outlet of the heat dissipation fin group;

[0023] Insulating cotton blocks are provided on the bottom surfaces of the two end portions of the heat dissipation fin group in the length direction and on the corresponding top surfaces of the heat-conducting flat tubes.

[0024] The utility model adopts another technical solution to solve its technical problem: providing a screen printing jig, which is applied to the above-mentioned two-way heat dissipation module to attach the thermal conductive gel on the secondary heat absorption sheet of the heat absorption unit, and is characterized in that: it comprises a base, a flip cover and a scraper, one side of the flip cover is hinged to one side of the base, a plurality of positioning blocks are distributed on the base, and the plurality of positioning blocks form a contoured groove for positioning the two-way heat dissipation module on the base, the flip cover is provided with a receiving groove for holding the thermal conductive glue, and the receiving groove is provided with glue outlet holes corresponding to the position, number and shape of the thermal conductive gel to be attached; when the flip cover is flipped and pressed onto the base, the plurality of glue outlet holes are respectively located directly above the corresponding positions to be attached, and the scraper is used to transfer the thermal conductive glue in the receiving groove through the glue outlet holes to the secondary heat absorption sheet to form the thermal conductive gel.

[0025] As a further improvement of the present invention, an avoidance groove for avoiding the insulating cotton block is provided on the base.

[0026] As a further improvement of the present invention, the base is provided with limiting guide blocks at four end corners close to the flip cover, and the four limiting guide blocks are arranged to form a square space that matches the flip cover.

[0027] As a further improvement of the present invention, a groove is provided on the side wall of the flip cover facing the first heat-conducting flat tube to avoid the heat dissipation fin group located on this side;

[0028] A guide slide is provided in the accommodating groove of the flip cover along the direction of the scraper, and a slide groove adapted to the guide slide is provided on the scraper.

[0029] The beneficial effects of the utility model are:

[0030] 1. By setting up two sets of heat-conducting flat tubes and corresponding heat dissipation fin groups, heat can be efficiently exported to the outside of the system. In addition, by setting up phase-change heat-conducting sheets at the primary heat source and thermal conductive gel at the secondary heat source, heat conduction is ensured while reducing product production costs.

[0031] 2. The screen printing jig has a simple structure and can attach thermal conductive gels of different shapes and positions at one time with high efficiency. It also ensures uniform attachment status and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of the bidirectional heat dissipation module of the present invention;

[0033] Figure 2 This is a schematic diagram of the bottom surface structure of the bidirectional heat dissipation module of the present invention;

[0034] Figure 3 This is a schematic structural diagram of the first-level heat absorbing sheet of the utility model;

[0035] Figure 4 This is a schematic diagram of the structure of the heat dissipation fins of the utility model;

[0036] Figure 5 This is a schematic diagram of the screen printing jig structure of the present invention;

[0037] Figure 6 This is a schematic diagram of the state where the bidirectional heat dissipation module of the utility model is positioned on a screen printing jig;

[0038] Figure 7 This is a schematic diagram of the screen printing state of the thermal conductive gel of the present invention.

[0039] The following description is made with reference to the accompanying drawings:

[0040] 1. Heat absorbing unit; 101. First-level heat absorbing sheet; 1011. Positioning portion; 10111. Avoidance slot; 102. Second-level heat absorbing sheet; 1021. Second-level heat absorbing sheet A; 1022. Second-level heat absorbing sheet B; 1023. Second-level heat absorbing sheet C; 1024. Second-level heat absorbing sheet D; 1012. First connecting portion; 10121. First connecting ear; 1013. Second connecting portion; 10131. Second connecting ear; 1014. Positioning portion; 1015. Connecting hole; 1016. Rectangular insulating sheet; 103. Phase-change thermal conductive sheet; 104. Thermally conductive gel; 2. Thermally conductive flat tube; 2A , first heat-conducting flat tube; 2B, second heat-conducting flat tube; 201, heat-absorbing part; 202, heat-dissipating part; 203, bending part; 204, curved insulating sheet; 3, heat-dissipating fin group; 301, heat-dissipating fin; 302, heat-dissipating air duct; 303, air inlet; 304, air outlet; 305, notch; 306, insulating cotton block; 4, base; 401, positioning block; 402, contoured groove; 403, avoidance groove; 404, limiting guide block; 5, flip cover; 501, accommodating groove; 502, glue outlet slot hole; 503, groove; 504, guide slide; 6, scraper; 601, slide. DETAILED DESCRIPTION

[0041] A preferred embodiment of the present invention is described in detail below with reference to the accompanying drawings.

[0042] See Figures 1 to 4 The present invention provides a two-way heat dissipation module, comprising a heat absorbing unit 1 for heat exchange, heat-conducting flat tubes 2 disposed on the heat absorbing unit 1 for energy transfer, and a heat dissipation fin assembly 3 disposed on the heat dissipation portion 202 of the heat-conducting flat tubes 2. Conventionally, a fan is installed on one side of the air inlet 303 of the heat dissipation fin assembly 3 to circulate air and transfer heat to the outside of the system.

[0043] The heat absorption unit 1 comprises a primary heat absorption sheet 101 and multiple secondary heat absorption sheets 102. The primary heat absorption sheet 101 has a phase-change heat conductive sheet 103 on its bottom surface for heat exchange with computer chips. The secondary heat absorption sheets 102 each have a specially shaped heat conductive gel 104 on their bottom surfaces for heat exchange with a secondary heat source. The heat conductive gel 104 is a paste-like substance before use. While its thermal conductivity is lower than that of the phase-change heat conductive sheet 103, it can still meet the requirements for heat exchange with the secondary heat source. It is also inexpensive and low-cost.

[0044] Two heat-conducting flat tubes 2 are configured, each comprising a heat-absorbing portion 201, a heat-dissipating portion 202, and a curved portion 203 integrally connecting the heat-absorbing portion 201 and the heat-dissipating portion 202. The heat-absorbing portions 201 of the two heat-conducting flat tubes 2 are arranged side by side and positioned on the upper surface of the primary heat-absorbing plate 101, such that the two heat-dissipating portions 202 are positioned opposite each other on either side of the primary heat-absorbing plate 101. Multiple secondary heat-dissipating plates 102 are arranged along the heat-conducting paths of the two heat-conducting flat tubes 2. The heat-absorbing portions 201 of the two heat-conducting flat tubes 2 absorb heat and transfer it to the heat-dissipating portions 202 at either end, enabling rapid heat dissipation from the heat source without interference between the heat-dissipating portions 202 at either end. The operating principle of the heat-conducting flat tubes 2 utilizes existing technology and will not be elaborated upon here.

[0045] The heat dissipation fin group 3 is configured into two groups and is respectively arranged on the heat dissipation part 202 of the two heat-conducting flat tubes 2. The heat dissipation fin group 3 is spliced ​​by multiple "]"-shaped heat dissipation fins 301 arranged side by side, and forms multiple heat dissipation ducts 302 arranged in parallel and arranged along the width direction of the heat dissipation part 202. The two sides of the heat dissipation duct 302 are respectively an air inlet 303 and an air outlet 304.

[0046] Furthermore, the first-stage heat absorbing plate 101 has a positioning portion 1011 for positioning the heat absorbing portion 201 of the two heat-conducting flat tubes 2, and two first connecting portions 1012 and second connecting portions 1013 arranged in parallel with the extension direction of the heat absorbing portion 201 and respectively placed on both sides of the positioning portion 1011; the first connecting portion 1012 is formed to extend outward along the horizontal direction of the positioning portion 1011, and its two ends in the longitudinal direction are bent upward and extended to form two first connecting ears 10121; the second connecting portion 1013 is formed by upward The bent limiting portion 1014 is connected to the positioning portion 1011, and its two ends in the length direction are bent downward and extended to both ends to form two second connecting ears 10131; the two first connecting ears 10121 and the two second connecting ears 10131 are each provided with a connecting hole 1015 for embedding a common connecting bolt to realize the connection between the two-way heat dissipation module and the notebook, and the bottom surface of the connecting ear is higher than the bottom surface of the positioning portion 1011, so that the two-way heat dissipation module can be in elastic contact with the notebook chip during installation to avoid damage to the chip.

[0047] A rectangular avoidance slot 10111 is provided on one side of the positioning portion 1011 near the limiting portion 1014. The bottom surface of the positioning portion 1011 and the bottom surface between the two second connecting ears 10131 of the second connecting portion 1013 are both pasted with a phase change heat conducting sheet 103 (see FIG. Figure 2 The middle light gray area is in contact with the primary heat source, ensuring quick heat removal and ensuring proper chip operation. Rectangular insulating sheets 1016 are attached to the bottom surfaces of both ends of the positioning portion 1011 in the width direction to prevent contact between the primary heat sink and the notebook circuit board, thus preventing potential safety hazards.

[0048] Further, for the convenience of description, the two heat-conducting flat tubes 2 are defined as the first heat-conducting flat tube 2A and the second heat-conducting flat tube 2B. Figure 2 , there are four secondary heat absorbing sheets 102. Of course, the position and structure of the secondary heat absorbing sheets can be set according to product requirements. In this embodiment, there are four secondary heat absorbing sheets 102, and the four secondary heat absorbing sheets 102 are provided with thermal conductive gel 104 (as shown in the attached Figure 2 The middle blue part includes:

[0049] The secondary heat absorbing sheet A1021 is provided on the side of the second connecting portion 1013 away from the positioning portion 1011. The bottom surface of the secondary heat absorbing sheet A1021 is affixed with a flat square thermal conductive gel 104;

[0050] The secondary heat absorbing sheet B1022 is located between the first connecting ear 10121 and the second connecting ear 10131 on the corresponding side. The top surface of the secondary heat absorbing sheet B1022 is connected to the curved portion of the first heat-conducting flat tube 2A and the heat-absorbing portion of the second heat-conducting flat tube 2B, respectively. The bottom surface of the secondary heat absorbing sheet B1022 is affixed with a flat rectangular thermal conductive gel 104.

[0051] The secondary heat absorbing sheet C1023 is provided at the end of the heat absorbing portion of the first heat-conducting flat tube 2A. The bottom surface of the secondary heat absorbing sheet C1023 is affixed with a flat rectangular heat-conducting gel 104;

[0052] The secondary heat absorbing sheet D1024 is provided on the bottom surface of one end of the bending portion of the first heat conducting flat tube 2A close to its heat dissipation portion. A flat L-shaped heat conducting gel 104 is attached to the bottom surface of the secondary heat absorbing sheet D1024.

[0053] Furthermore, a curved insulating sheet 204 having the same shape as the curved portion of the first heat-conducting flat tube 2A is provided on the bottom surface of the curved portion to prevent the heat-conducting flat tube 2A from contacting the notebook circuit board.

[0054] Furthermore, the heat sink fin assembly 3 is constructed by splicing together two fins 301 of different lengths, forming multiple positioning notches 305 on one side of the air outlet 304 of the heat sink fin assembly 3. The multiple notches 305 allow for installation avoidance while also creating a staggered airflow pattern, increasing airflow. Insulating cotton blocks 306 are located on the bottom surfaces of both longitudinal ends of the heat sink fin assembly 3 and on the top surfaces of the corresponding thermally conductive flat tubes 2, providing insulation and cushioning.

[0055] See Figures 5 to 7 The present invention provides a screen printing jig for use with the aforementioned bidirectional heat dissipation module to adhere thermally conductive gel 104 to the secondary heat absorbing sheet 102 of the heat absorbing unit 1. The screen printing jig comprises a base 4, a flip cover 5, and a scraper 6. One side of the flip cover 5 is hingedly connected to one side of the base 4 via a hinge seat, allowing the flip cover 5 to flip around the connection side. The base 4 is provided with a plurality of positioning blocks 401, which form contoured grooves 402 for positioning the bidirectional heat dissipation module on the base 4. The flip cover 5 is provided with a receiving groove 501 for holding the thermally conductive gel. The receiving groove 501 is provided with glue outlet holes 502 corresponding to the position, number, and shape of the thermally conductive gel to be adhered. The thermally conductive gel is a paste-like substance that does not flow after being transferred to the secondary heat absorbing sheet 102. The product is then placed in a heating furnace to heat the thermally conductive gel and solidify it, forming the thermally conductive gel 104.

[0056] When the flip cover 5 is flipped over and placed on the base 4, the multiple glue outlet slots 502 are located directly above the corresponding locations to be attached. The scraper 6 is used to transfer the thermally conductive glue in the accommodating groove 501 through the glue outlet slots 502 to the secondary heat absorbing sheet 102, forming the thermally conductive gel 104. As can be seen, the shape, number, and location of the glue outlet slots 502 on the flip cover 5 are consistent with the requirements for attaching thermally conductive gel to the bidirectional heat dissipation module. The fixture has a simple structure and can complete attachment of multiple locations simultaneously, which is highly efficient and ensures uniform attachment, thus guaranteeing product quality.

[0057] Furthermore, the base 4 is provided with an escape groove 403 for evading the insulating cotton block 306 .

[0058] Furthermore, the base 4 is provided with limiting guide blocks 404 at the four end corners close to the flip cover 5. The four limiting guide blocks 404 are arranged to form a square space that matches the flip cover 5 to ensure that the flip cover 5 is stably pressed.

[0059] Furthermore, a recess 503 is formed on the sidewall of the flip cover 5 facing the first thermally conductive flat tube 2A to provide clearance for the heat dissipation fin assembly 3 located on that side. A guide slide 504 is provided within the receiving groove 501 of the flip cover 5, along the direction of the scraper 6. The scraper 6 is provided with a slide groove 601 that mates with the guide slide 504. Conventionally, an operator holds the scraper 6 and scrapes and squeezes the thermally conductive adhesive within the receiving groove 501. The cooperation between the slide groove 601 and the guide slide 504 ensures stable scraping of the scraper 6 within the receiving groove 501.

[0060] In summary, the utility model provides a bidirectional heat dissipation module, which can efficiently export heat to the outside of the system by arranging two groups of heat-conducting flat tubes and corresponding heat-conducting fin groups, and by arranging phase-change heat-conducting sheets on the main heat source and heat-conducting gel on the secondary heat source, heat conduction is ensured while reducing the production cost of the product; in addition, the screen printing jig provided has a simple structure and can attach thermal conductive gels of different shapes and positions at one time, with high efficiency, and ensures the uniformity of the attachment state, thereby ensuring product quality.

[0061] In the above description, many specific details are set forth in order to fully understand the present invention. However, the above description is only a preferred embodiment of the present invention. The present invention can be implemented in many other ways different from those described herein, so the present invention is not limited by the specific implementation disclosed above. At the same time, any person skilled in the art can use the above-disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the scope of protection of the technical solution of the present invention.

Claims

1. A bidirectional heat dissipation module, characterized in that: include: A heat absorption unit (1) comprises a primary heat absorption sheet (101) and a plurality of secondary heat absorption sheets (102), wherein a phase-change heat conductive sheet (103) for performing heat exchange with a computer chip is provided on the bottom surface of the primary heat absorption sheet (101), and a heat conductive gel (104) having a specific shape and for performing heat exchange with a secondary heat source is provided on the bottom surfaces of the plurality of secondary heat absorption sheets (102); The heat-conducting flat tube (2) is configured as two, each of the heat-conducting flat tubes (2) having a heat-absorbing portion (201), a heat-dissipating portion (202), and a bent portion (203) integrally connecting the heat-absorbing portion (201) and the heat-dissipating portion (202); the heat-absorbing portions (201) of the two heat-conducting flat tubes (2) are arranged side by side and positioned on the upper surface of the first-level heat-absorbing plate (101), so that the two heat-dissipating portions (202) are relatively arranged on both sides of the first-level heat-absorbing plate (101); and a plurality of the second-level heat-absorbing plates (102) are arranged on the heat-conducting paths of the two heat-conducting flat tubes (2); The heat dissipation fin group (3) is configured into two groups and is respectively arranged on the heat dissipation parts (202) of the two heat-conducting flat tubes (2). The heat dissipation fin group (3) is formed by splicing a plurality of "]"-shaped heat dissipation fins (301) arranged side by side, and forms a plurality of heat dissipation air ducts (302) arranged side by side and arranged along the width direction of the heat dissipation part (202). The two sides of the heat dissipation air duct (302) are respectively an air inlet (303) and an air outlet (304).

2. The bidirectional heat dissipation module according to claim 1, characterized in that: The first-level heat absorbing plate (101) comprises a positioning portion (1011) for positioning the heat absorbing portions (201) of the two heat-conducting flat tubes (2), and a first connecting portion (1012) and a second connecting portion (1013) arranged parallel to the extending direction of the heat absorbing portions (201) and respectively located on both sides of the positioning portion (1011); The first connecting portion (1012) is formed by extending outwards in the horizontal direction of the positioning portion (1011), and its two ends in the length direction are bent upwards and extended to form two first connecting ears (10121); The second connecting portion (1013) is connected to the positioning portion (1011) via an upwardly bent limiting portion (1014), and both ends of the second connecting portion (1013) are bent downward and extended to form two second connecting ears (10131). The two first connecting ears (10121) and the two second connecting ears (10131) are both provided with connecting holes (1015) for embedding common connecting bolts.

3. The bidirectional heat dissipation module according to claim 2, characterized in that: A rectangular avoidance slot (10111) is provided on one side of the positioning portion (1011) close to the limiting portion (1014), and the phase change heat conductive sheet (103) is adhered to the bottom surface of the positioning portion (1011) and the bottom surface between the two second connecting ears (10131) of the second connecting portion (1013); Rectangular insulating sheets (1016) are respectively attached to the bottom surfaces of both ends of the positioning portion (1011) in the width direction.

4. The bidirectional heat dissipation module according to claim 3, characterized in that: The two heat-conducting flat tubes (2) are respectively defined as a first heat-conducting flat tube (2A) and a second heat-conducting flat tube (2B). The secondary heat absorbing sheets (102) are configured in four pieces, including: A secondary heat absorbing sheet A (1021) is provided on a side of the second connecting portion (1013) away from the positioning portion (1011), and a flat square heat-conducting gel (104) is attached to the bottom surface of the secondary heat absorbing sheet A (1021); A secondary heat absorbing sheet B (1022) is provided between the first connecting ear (10121) and the second connecting ear (10131) on the corresponding side. The top surface of the secondary heat absorbing sheet B (1022) is respectively connected to the bending portion of the first heat-conducting flat tube (2A) and the heat-absorbing portion of the second heat-conducting flat tube (2B), and a flat rectangular heat-conducting gel (104) is attached to the bottom surface thereof. A secondary heat absorbing sheet C (1023) is provided at the end of the heat absorbing portion of the first heat-conducting flat tube (2A), and a flat rectangular heat-conducting gel (104) is attached to the bottom surface of the secondary heat absorbing sheet C (1023); A secondary heat absorbing sheet D (1024) is provided on the bottom surface of one end of the bent portion of the first heat-conducting flat tube (2A) close to its heat dissipation portion, and a flat L-shaped heat-conducting gel (104) is attached to the bottom surface of the secondary heat absorbing sheet D (1024).

5. The bidirectional heat dissipation module according to claim 4, characterized in that: A curved insulating sheet (204) having the same shape as the curved portion of the first heat-conducting flat tube (2A) is provided on the bottom surface of the curved portion.

6. The bidirectional heat dissipation module according to claim 1, characterized in that: The heat dissipation fin group (3) is formed by splicing two heat dissipation fins (301) of different lengths to form a plurality of notches (305) for positioning on one side of the air outlet (304) of the heat dissipation fin group (3); Insulating cotton blocks (306) are provided on the bottom surfaces of the two ends of the heat dissipation fin group (3) in the length direction and on the top surfaces of the corresponding heat-conducting flat tubes (2).

7. A screen printing jig, applied to the bidirectional heat dissipation module according to any one of claims 1 to 6, for attaching the thermal conductive gel (104) to the secondary heat absorbing sheet (102) of the heat absorbing unit (1), characterized in that: The invention comprises a base (4), a flip cover (5) and a scraper (6), one side of the flip cover (5) is hinged to one side of the base (4), a plurality of positioning blocks (401) are distributed on the base (4), the plurality of positioning blocks (401) form a contoured groove (402) for positioning the bidirectional heat dissipation module on the base (4), the flip cover (5) is provided with a receiving groove (501) for containing thermal conductive glue, the receiving groove (501) is provided with glue outlet holes (502) corresponding to the position, number and shape of the thermal conductive glue to be attached; when the flip cover (5) is turned over and pressed onto the base (4), the plurality of glue outlet holes (502) are respectively located directly above the corresponding positions to be attached, and the scraper (6) is used to transfer the thermal conductive glue in the receiving groove (501) through the glue outlet holes (502) to the secondary heat absorbing sheet (102) to form the thermal conductive gel (104).

8. The screen printing jig according to claim 7, characterized in that: The base (4) is provided with an avoidance groove (403) for avoiding the insulating cotton block (306).

9. The screen printing jig according to claim 7, characterized in that: The base (4) is provided with limiting guide blocks (404) at four end corners close to the flip cover (5), and the four limiting guide blocks (404) are arranged to form a square space that matches the flip cover (5).

10. The screen printing jig according to claim 7, characterized in that: A groove (503) is provided on the side wall of the flip cover (5) facing the first heat-conducting flat tube (2A) for avoiding the heat dissipation fin group (3) located on this side; A guide slide (504) is provided in the receiving groove (501) of the flip cover (5) along the direction of the scraper (6), and a slide groove (601) adapted to the guide slide (504) is provided on the scraper (6).

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