Heat dissipation module
By employing a design that arranges frontal and leeward radiators side-by-side with different fin densities, the problem of insufficient heat dissipation capacity and poor space utilization of all-aluminum microchannel radiators is solved, achieving more efficient heat exchange and space utilization.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- IND TECH RES INST
- Filing Date
- 2025-01-06
- Publication Date
- 2026-06-05
AI Technical Summary
Existing all-aluminum microchannel heat sinks have limitations in terms of curvature radius during manufacturing, resulting in insufficient heat dissipation capacity or poor utilization of internal space.
The system employs a combination of front and back radiators arranged side-by-side. The fins of the front radiator are wavy louvers, while the fins of the back radiator are square louvers. The different fin densities improve heat exchange efficiency through airflow disturbance and reduce irregular spaces inside the casing.
This improved the heat dissipation capacity and internal space utilization of the heat dissipation module, avoided the negative impact of excessive pressure drop on heat transfer efficiency, and maintained the expected heat transfer area size.
Smart Images
Figure CN122161044A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to a heat dissipation module. Background Technology
[0002] To improve the heat dissipation capacity of radiators, the common approach is to increase the size of the radiator, but this increases the cost. To address this, the industry is currently exploring replacing the finned structure (a combination of copper pipes and aluminum fins) in radiators with an all-aluminum microchannel structure (a combination of flat pipes and louvered fins), aiming to increase the heat dissipation capacity without increasing the overall size.
[0003] However, the manufacturing of all-aluminum microchannel structures presents numerous limitations, making it difficult for heat sinks to achieve the expected heat dissipation capacity. For example, the radius of curvature of an all-aluminum microchannel structure cannot be too small, otherwise there is a risk of tube breakage. Conversely, if the radius of curvature of an all-aluminum microchannel structure is too large, it will result in poor space utilization within the heat sink casing. Therefore, researchers in this field are working to solve the aforementioned problems. Summary of the Invention
[0004] The present invention provides a heat dissipation module that can improve heat dissipation capacity while taking into account the utilization rate of internal space.
[0005] An embodiment of the present invention discloses a heat dissipation module comprising a front radiator, a back radiator, and at least one connecting pipe. The front radiator includes two first water tanks, a plurality of first microchannel structures, and a plurality of first fins. The two first water tanks are connected through these first microchannel structures. Each of the two first water tanks has at least one first inlet and at least one first outlet. The first fins are disposed between these first microchannel structures. The back radiator is arranged side-by-side with the front radiator. The back radiator includes two second water tanks, a plurality of second microchannel structures, and a plurality of second fins. The two second water tanks are connected through these second microchannel structures. Each of the two second water tanks has at least one second inlet and at least one second outlet. The second fins are disposed between these second microchannel structures. The connecting pipe connects at least one second outlet of one of the two second water tanks of the back radiator to at least one first inlet of one of the two first water tanks of the front radiator. The first fins of the windward radiator are wavy louvered fins, while the second fins of the leeward radiator are square louvered fins, and the density of the first fins is less than the density of the second fins.
[0006] According to the heat dissipation module disclosed in the above embodiments, the ventilator and the airflow radiator are arranged side by side. The first fins of the airflow radiator are wavy louvered fins, and the second fins of the ventilator are square louvered fins. The configuration in which the density of the first fins is less than the density of the second fins can disturb the airflow as it flows sequentially through the airflow radiator and the ventilator, causing the airflow to collide with the second fins after passing over the first fins. This improves the heat exchange efficiency between the heat dissipation module and the airflow, thus enhancing the heat dissipation capacity of the heat dissipation module. In addition, the side-by-side arrangement of the ventilator and the airflow radiator helps to reduce irregular spaces inside the housing when placed inside the housing, thereby improving the space utilization rate inside the housing.
[0007] The above description of the content of this invention and the following description of the embodiments are used to demonstrate and explain the principles of this invention, and to provide a further explanation of the scope of the patent application of this invention. Attached Figure Description
[0008] Figure 1 A perspective view of the heat dissipation module disclosed in the first embodiment of the present invention;
[0009] Figure 2 along Figure 1 The sectional view shown by the secant line 2-2;
[0010] Figure 3 for Figure 1 A three-dimensional view of the heat dissipation module from another perspective;
[0011] Figure 4 along Figure 1 The sectional view shown by the secant line 4-4;
[0012] Figure 5 A schematic diagram showing the airflow over the first fin of the windward radiator and the second fin of the leeward radiator;
[0013] Figure 6 This is a perspective view of the heat dissipation module disclosed according to the second embodiment of the present invention;
[0014] Figure 7 for Figure 6 A three-dimensional view of the heat dissipation module from another perspective;
[0015] Figure 8 along Figure 6 The sectional view shown by the secant line 8-8;
[0016] Figure 9 along Figure 6 The sectional view shown by the sectional line 9-9.
[0017] [Symbol Explanation]
[0018] 1,1a: Heat dissipation module
[0019] 10,10a: Front radiator
[0020] 11,11a: First water tank
[0021] 111, 111a: First water tank section
[0022] 112, 112a: Second water tank section
[0023] 113, 113a: Third water tank section
[0024] 12,12a: First microchannel structure
[0025] 13: First fin
[0026] 20,20a: Back-ventilated radiator
[0027] 21, 21a: Second water tank
[0028] 211, 211a: Fourth water tank section
[0029] 212, 212a: Fifth water tank section
[0030] 213, 213a: Sixth water tank section
[0031] 22,22a: Second microchannel structure
[0032] 23: Second fin
[0033] 30, 30a: Connecting pipe
[0034] i1, i1a: First entry point
[0035] O1, O1a: First Exit
[0036] A1: Arrow
[0037] i2, i2a: Second entry point
[0038] O2, O2a: Second exit
[0039] A2: Arrow
[0040] F: Airflow
[0041] A3: Arrow
[0042] MI: Inflow manifold
[0043] MO: Outflow manifold Detailed Implementation
[0044] Please see Figure 1 , Figure 1 This is a perspective view of the heat dissipation module disclosed in the first embodiment of the present invention. In this embodiment, the heat dissipation module 1 includes a front radiator 10, a back radiator 20, and a connecting pipe 30.
[0045] Next, please refer to Figure 1 and 2 . Figure 2 along Figure 1 The sectional view shown by the secant line 2-2.
[0046] The air-facing radiator 10 is an aluminum microchannel heat exchanger. The air-facing radiator 10 includes two first water tanks 11, multiple first microchannel structures 12, and multiple first fins 13. These first microchannel structures 12 are flat structures with internal flow channels, and the two first water tanks 11 are connected through these first microchannel structures 12. Each of the two first water tanks 11 has a first inlet i1 and a first outlet O1. The first fins 13 of the air-facing radiator 10 are corrugated louvered fins (also called triangular louvered fins), and these first fins 13 are disposed between these first microchannel structures 12.
[0047] In this embodiment, the first coolant flow path (as shown by arrow A1) formed by the two first water tanks 11 of the windward radiator 10 and these first microchannel structures 12 is meandering. Each of the two first water tanks 11 includes a plurality of water tank sections arranged in sequence. These water tank sections of the two first water tanks 11 correspond to each other. In each of the two first water tanks 11, at least two of these water tank sections are not directly connected. The first inlet i1 and the first outlet O1 are respectively located in one of the water tank sections of one of the two first water tanks 11 and one of the water tank sections of the other of the two first water tanks 11.
[0048] For example, each of the two first water tanks 11 includes a first water tank section 111, a second water tank section 112, and a third water tank section 113 arranged in sequence in the height direction, wherein the second water tank section 112 is located above the third water tank section 113, and the first water tank section 111 is located above the second water tank section 112. The first water tank sections 111, 112, and 113 of the two first water tanks 11 correspond to each other. That is, the first water tank sections 111 of the two first water tanks 11 are connected through a portion of the first microchannel structure 12, the second water tank sections 112 of the two first water tanks 11 are connected through another portion of the first microchannel structure 12, and the third water tank sections 113 of the two first water tanks 11 are connected through another portion of the first microchannel structure 12. In one of the two first water tanks 11, the first water tank section 111 is not directly connected to the second water tank section 112, while the second water tank section 112 is directly connected to the third water tank section 113. In the other of the two first water tanks 11, the first water tank section 111 is directly connected to the second water tank section 112, while the second water tank section 112 is not directly connected to the third water tank section 113. The first inlet i1 and the first outlet O1 are respectively located in the first water tank section 111 of one of the two first water tanks 11 and the third water tank section 113 of the other of the two first water tanks 11.
[0049] Next, please refer to Figure 3 and Figure 4 . Figure 3 for Figure 1 A three-dimensional view of the heat dissipation module 1 from another perspective. Figure 4 along Figure 1 The sectional view shown by the secant line 4-4.
[0050] The radiator 20 is an aluminum microchannel heat exchanger. The radiator 20 includes two second water tanks 21, multiple second microchannel structures 22, and multiple second fins 23. These second microchannel structures 22 are flat structures with internal flow channels, and the two second water tanks 21 are connected through these structures. Each second water tank 21 has a second inlet i2 and a second outlet O2. The second fins 23 of the radiator 20 are square louvered fins (also called rectangular louvered fins), and these fins 23 are disposed between the second microchannel structures 22.
[0051] In this embodiment, the fin density is defined as the number of fins per inch, and a fin is defined as the line connecting the crest of a fin to its adjacent trough. The density of the first fins 13 of the front radiator 10 is less than the density of the second fins 23 of the back radiator 20. For example, the ratio of the density of the second fins 23 to the density of the first fins 13 is greater than 1 and less than 3.
[0052] In this embodiment, the second coolant flow path (as shown by arrow A2) formed by the two second water tanks 21 of the radiator 20 and these second microchannel structures 22 is meandering. Each of the two second water tanks 21 includes a plurality of water tank sections arranged in sequence. These water tank sections of the two second water tanks 21 correspond to each other; in each of the two second water tanks 21, at least two of these water tank sections are not directly connected. The second inlet i2 and the second outlet O2 are respectively located in one of the water tank sections of one of the two second water tanks 21 and one of the water tank sections of the other of the two second water tanks 21.
[0053] For example, each of the two second water tanks 21 includes a fourth water tank section 211, a fifth water tank section 212, and a sixth water tank section 213 arranged in sequence along its height. The fifth water tank section 212 is located above the sixth water tank section 213, and the fourth water tank section 211 is located above the fifth water tank section 212. The fourth water tank section 211, fifth water tank section 212, and sixth water tank section 213 of the two second water tanks 21 correspond to each other. That is, the fourth water tank section 211 of the two second water tanks 21 is connected through a portion of the second microchannel structure 22, the fifth water tank section 212 of the two second water tanks 21 is connected through another portion of the second microchannel structure 22, and the sixth water tank section 213 of the two second water tanks 21 is connected through another portion of the second microchannel structure 22. In one of the two second water tanks 21, the fourth water tank section 211 is not directly connected to the fifth water tank section 212, while the fifth water tank section 212 is directly connected to the sixth water tank section 213. In the other of the two second water tanks 21, the fourth water tank section 211 is directly connected to the fifth water tank section 212, while the fifth water tank section 212 is not directly connected to the sixth water tank section 213. The second inlet i2 and the second outlet O2 are located in the fourth water tank section 211 of one of the two second water tanks 21 and the sixth water tank section 213 of the other of the two second water tanks 21, respectively.
[0054] like Figure 1 As shown, the first inlet i1 and the second outlet O2 are located on one side of the heat dissipation module 1, and the connecting pipe 30 connects the first inlet i1 and the second outlet O2, thus connecting the first coolant flow path and the second coolant flow path in series. Furthermore, as... Figure 3 As shown, the first outlet O1 and the second inlet i2 are located on the other side of the heat dissipation module 1.
[0055] In this embodiment, the airflow F flows from the windward radiator 10 to the leeward radiator 20, so that the airflow F passes through the windward radiator 10 first and then flows through the leeward radiator 20.
[0056] In this embodiment, the second inlet i2 is used to allow high-temperature coolant to flow into the leeward radiator 20. The coolant flowing into the leeward radiator 20 then flows along a meandering second flow path (as shown by arrow A2) and exits the leeward radiator 20 from the second outlet O2. Next, the coolant flows towards the inward radiator 10 via the connecting pipe 30 and then flows into the inward radiator 10 via the first inlet i1. The coolant flowing into the inward radiator 10 then flows along a meandering first flow path (as shown by arrow A1) and exits the leeward radiator 20 from the first outlet O1.
[0057] Next, please refer to Figure 1 , Figure 2 and Figure 5 , Figure 5 A schematic diagram showing airflow passing through the first fin of the front radiator and the second fin of the back radiator is shown. As the airflow F flows through the front radiator 10 and the back radiator 20 in succession, the air exchanges heat with the front radiator 10 and the back radiator 20, carrying away the heat of the coolant, thus cooling the coolant flowing out of the back radiator 20 from the first outlet O1.
[0058] In this embodiment, the radiator 20 and the radiator 10 are arranged side by side. The first fins 13 of the radiator 10 are wavy louvered fins, and the second fins 23 of the radiator 20 are square louvered fins. The density of the first fins 13 is less than the density of the second fins 23. This arrangement can disturb the airflow F as it flows sequentially through the radiator 10 and the radiator 20, causing the airflow F to impact the second fins 23 after passing over the first fins 13 (e.g., ...). Figure 5 As shown in the figure, the heat exchange efficiency between the heat dissipation module 1 and the airflow F is improved, thus improving the heat dissipation capacity of the heat dissipation module 1.
[0059] Please refer to Table 1. Table 1 lists the heat dissipation capacity of finned radiators, two-piece radiators with the same fin type and density, and the windward radiator 10 and leeward radiator 20 with different fin types and densities in this embodiment under the same or similar conditions, the air temperature difference between the air inlet and outlet sides of the leeward radiator, the percentage of the windward area of the two-phase zone of the windward radiator, and the percentage of the windward area of the subcooled zone of the windward radiator.
[0060]
[0061]
[0062] As can be seen from the table above, the front-facing radiator 10 and the back-facing radiator 20, with different fin types and densities in this embodiment, have superior heat dissipation capabilities compared to radiators with other configurations. This is because in finned radiators, the fins and copper pipes are made of different materials, and the copper pipes are connected to the fins via a plug-in method, resulting in poor heat transfer efficiency. As for two-fin radiators with the same fin type and density, they experience low airflow disturbance and do not exhibit airflow impact on the fins of the back-facing radiator, thus offering no heat transfer enhancement effect.
[0063] Furthermore, by using a lower density configuration for the first fins 13 of the front radiator 10, the pressure drop can be adjusted, and the heat transfer area (two-phase region area) of the front radiator 10 can be reduced, thereby lowering the temperature increase of the air after passing through the front radiator 10. In this way, the air can flow to the back radiator 20 at a lower temperature, thus improving the heat transfer efficiency of the overheated area and two-phase region of the back radiator 20.
[0064] Furthermore, by configuring the ratio of the density of the second fins 23 of the back-wind radiator 20 to the density of the first fins 13 of the front-wind radiator 10 to be greater than 1 and less than 3, it is possible to avoid excessive pressure drop that would negatively impact heat transfer efficiency while still maintaining the expected heat transfer area.
[0065] It should be noted that the ratio of the density of the second fins 23 of the radiator 20 to the density of the first fins 13 of the radiator 10 can be adjusted arbitrarily according to actual needs and is not limited to the above range.
[0066] In this embodiment, the side-by-side arrangement of the leeward radiator 20 and the windward radiator 10 helps to reduce the irregular space inside the housing when placed inside the housing, thereby improving the space utilization rate inside the housing.
[0067] It should be noted that the number of water tank sections of each first water tank 11 of the windward radiator 10 and the number of water tank sections of each second water tank 21 of the leeward radiator 20 are not limited to three, but can be adjusted according to needs.
[0068] Next, please refer to Figure 6 and Figure 7 , Figure 6 This is a perspective view of the heat dissipation module disclosed in the second embodiment of the present invention. Figure 7 for Figure 6 A three-dimensional view of the heat dissipation module from another perspective.
[0069] The heat dissipation module 1a in this embodiment is similar to the heat dissipation module 1 in the previous embodiment. The following mainly describes the differences between the two. As for the same parts, please refer to the previous paragraphs, and will not be repeated here.
[0070] In the heat dissipation module 1a of this embodiment, the two first water tanks 11a of the windward radiator 10a and these first microchannel structures 12a, together with the two second water tanks 21a of the leeward radiator 20a and these second microchannel structures 22a, form at least one coolant flow path (as shown by arrow A3) in a U-shape.
[0071] To elaborate further, please refer to Figure 8 , Figure 8 along Figure 6 The cross-sectional view is shown by section line 8-8. In each of the two first water tanks 11a of the radiator 10a, the first water tank section 111a, the second water tank section 112a, and the third water tank section 113a are not connected to each other. Furthermore, one of the first water tanks 11a of the radiator 10a has three first inlets i1a, which are located in the first water tank section 111a, the second water tank section 112a, and the third water tank section 113a, respectively. Moreover, the other first water tank 11a of the radiator 10a has three first outlets O1a, which are located in the first water tank section 111a, the second water tank section 112a, and the third water tank section 113a, respectively.
[0072] To elaborate further, please refer to Figure 9 , Figure 9 along Figure 6 The cross-sectional view is shown by section line 9-9. In each of the two second water tanks 21a of the radiator 20a, the fourth water tank section 211a, the fifth water tank section 212a, and the sixth water tank section 213a are not connected to each other. Furthermore, one of the second water tanks 21a of the radiator 20a has three second inlets i2a, which are located in the fourth water tank section 211a, the fifth water tank section 212a, and the sixth water tank section 213a, respectively. Moreover, the other second water tank 21a of the radiator 20a has three second outlets O2a, which are located in the fourth water tank section 211a, the fifth water tank section 212a, and the sixth water tank section 213a, respectively.
[0073] In this embodiment, three first inlets i1a and three second outlets O2a are located on one side of the heat dissipation module 1a. The heat dissipation module 1a includes three connecting pipes 30a, which are respectively connected to the three first inlets i1a and the three second outlets O2a, forming multiple parallel coolant flow paths (as shown by arrow A3). Furthermore, the three first outlets O1a and three second inlets i2a are located on the other side of the heat dissipation module 1a. These three second inlets i2a are used to connect to an inlet manifold MI, and the three first outlets O1a are used to connect to an outlet manifold MO.
[0074] In this embodiment, the high-temperature coolant enters the radiator 20a via three streams through the inlet manifold MI, and then flows out of the radiator 20a along these coolant flow paths (such as arrow A3). Next, the coolant flows into the front radiator 10a through the connecting pipe 30a. Then, the coolant flows out of the front radiator 10a and is collected in the outlet manifold MO.
[0075] It should be noted that the number of water tank sections in each of the first water tanks 11a of the windward radiator 10a and the number of water tank sections in each of the second water tanks 21a of the leeward radiator 20a are not limited to three, but can be adjusted according to needs. For example, in one embodiment, the number of water tank sections in each of the first water tanks of the windward radiator and the number of water tank sections in each of the second water tanks of the leeward radiator can both be one.
[0076] According to the heat dissipation module disclosed in the above embodiments, the ventilator and the airflow radiator are arranged side by side. The first fins of the airflow radiator are wavy louvered fins, and the second fins of the ventilator are square louvered fins. The configuration in which the density of the first fins is less than the density of the second fins can disturb the airflow as it flows sequentially through the airflow radiator and the ventilator, causing the airflow to collide with the second fins after passing over the first fins. This improves the heat exchange efficiency between the heat dissipation module and the airflow, thus enhancing the heat dissipation capacity of the heat dissipation module. In addition, the side-by-side arrangement of the ventilator and the airflow radiator helps to reduce irregular spaces inside the housing when placed inside the housing, thereby improving the space utilization rate inside the housing.
Claims
1. A heat dissipation module, characterized in that, Include: A windward radiator includes two first water tanks, multiple first microchannel structures and multiple first fins. The two first water tanks are connected through the first microchannel structures. Each of the two first water tanks has at least one first inlet and at least one first outlet. The first fins are disposed between the first microchannel structures. A radiator with a ventilated side is arranged alongside the radiator with a frontal side. The ventilator includes two second water tanks, multiple second microchannel structures, and multiple second fins. The two second water tanks are connected through the second microchannel structures. Each of the two second water tanks has at least one second inlet and at least one second outlet. The second fins are disposed between the second microchannel structures. At least one connecting pipe connects to at least one second outlet of one of the two second water tanks of the radiator and at least one first inlet of one of the two first water tanks of the radiator. The first fins of the windward radiator are wavy louvered fins, and the second fins of the leeward radiator are square louvered fins. The density of the first fins is less than the density of the second fins.
2. The heat dissipation module as described in claim 1, characterized in that, The ratio of the density of the second fins to the density of the first fins is greater than 1 and less than 3.
3. The heat dissipation module as described in claim 1, characterized in that, The first coolant flow path formed by the two first water tanks of the windward radiator and the first microchannel structure is meandering.
4. The heat dissipation module as described in claim 3, characterized in that, Each of the two first water tanks includes a plurality of water tank sections arranged in sequence; the water tank sections of the two first water tanks correspond to each other; in each of the two first water tanks, at least two of the water tank sections are not directly connected; the at least one first inlet and the at least one first outlet are respectively located in one of the water tank sections of one of the two first water tanks and in one of the water tank sections of the other of the two first water tanks.
5. The heat dissipation module as described in claim 4, characterized in that, The second coolant flow path formed by the two second water tanks and the second microchannel structure of the radiator is meandering.
6. The heat dissipation module as described in claim 5, characterized in that, Each of the two second water tanks includes a plurality of water tank sections arranged in sequence; the water tank sections of the two second water tanks correspond to each other; in each of the two second water tanks, at least two of the water tank sections are not directly connected; the at least one second inlet and the at least one second outlet are respectively located in one of the water tank sections of one of the two second water tanks and in one of the water tank sections of the other of the two second water tanks.
7. The heat dissipation module as described in claim 6, characterized in that, The number of water tank sections in each of the two first water tanks is three, and the number of water tank sections in each of the two second water tanks is three.
8. The heat dissipation module as described in claim 1, characterized in that, The coolant flow path formed by the two first water tanks, the first microchannel structures, the two second water tanks, and the second microchannel structures is U-shaped.
9. The heat dissipation module as described in claim 8, characterized in that, Each of the two first water tanks and the two second water tanks comprises a plurality of water tank sections arranged in sequence; the water tank sections of the two first water tanks correspond to each other; the water tank sections of each of the two first water tanks are not connected; the number of at least one first inlet and the number of at least one first outlet are both multiple, the first inlets are respectively located in the water tank sections of one of the two first water tanks, and the first outlets are respectively located in the water tank sections of one of the two first water tanks; the water tank sections of the two second water tanks correspond to each other; the water tank sections of each of the two second water tanks are not connected; the number of at least one second inlet and the number of at least one second outlet are both multiple, the second inlets are respectively located in the water tank sections of one of the two second water tanks, and the second outlets are respectively located in the water tank sections of one of the two second water tanks; the number of at least one connecting pipe is multiple, and the connecting pipes are respectively connected to the first inlets and the second outlets.
10. The heat dissipation module as described in claim 9, characterized in that, Each of the two first water tanks has three water tank sections, three first inlets and three first outlets; each of the two second water tanks has three water tank sections, three second inlets and three second outlets; and three connecting pipes.