Heat exchange device and heat dissipation cabinet

Abstract

The utility model discloses an embodiment provides a kind of heat exchange device and heat dissipation cabinet, it is related to electronic equipment heat dissipation technical field, and the heat exchange device is installed in heat dissipation cabinet;With the side of the cabinet front shell of heat dissipation cabinet, with at least one cold end air inlet and at least one cold end air outlet;Heat exchange device top end and bottom end are provided with hot end air inlet and hot end air outlet respectively;Including: at least one heat exchanger single body;Each heat exchanger single body includes: heat exchanger single body shell and single heat exchange fin;Heat exchange fin includes multiple heat exchange fin pipes;The two ends of multiple heat exchange fin pipes are communicated with hot end air inlet and hot end air outlet, and the inside of multiple heat exchange fin pipes is hot airflow cavity;The region between the outer side wall of multiple heat exchange fin pipes and heat exchanger single body shell is formed into cold airflow cavity;Hot airflow cavity and cold airflow cavity are isolated from each other.The heat exchange device can improve the heat dissipation efficiency between cold airflow and hot airflow.

Description

Technical Field

[0001] This utility model relates to the field of heat dissipation technology for electronic devices, and in particular to a heat exchange device and a heat dissipation enclosure. Background Technology

[0002] With the development of power electronics technology, the power density of products is constantly increasing, their size is becoming smaller, and their application scenarios in harsh environments are gradually increasing, leading to ever-increasing challenges in thermal management. For example, industrial control cabinets contain high-heat-generating components such as power modules and resistors, as well as components such as capacitors and batteries that do not generate heat or generate very little heat but are highly sensitive to temperature. During operation, the equipment needs to dissipate heat from the cavity in a timely manner to ensure that the heat-generating components do not exceed their operating temperature range, while keeping the heat-sensitive components within a safe temperature range.

[0003] Industrial environments are complex, often containing dust particles or high-humidity gases. This necessitates that server racks be designed as highly protective or even airtight cavities to prevent dust and moisture from entering and causing short circuits. Current equipment rack designs often employ air-to-air heat exchangers to cool the sealed cavity, dissipating heat by exchanging heat between the cool air outside and the warm air inside. However, this method has low heat exchange efficiency. Improving the heat exchange capacity and efficiency of air-to-air heat exchangers for server racks has become a pressing technical problem for those skilled in the art. Utility Model Content

[0004] The purpose of this utility model embodiment is to provide a heat exchange device and a heat dissipation casing to improve heat dissipation efficiency. The specific technical solution is as follows:

[0005] This utility model provides a heat exchange device installed inside a heat dissipation enclosure. The heat exchange device has at least one cold-end air inlet and at least one cold-end air outlet on the side of the heat dissipation enclosure that is in contact with the front shell of the enclosure. The cold-end air outlet is spaced apart from the cold-end air inlet. The heat exchange device has a hot-end air inlet and a hot-end air outlet at its top and bottom ends, respectively. It includes at least one heat exchanger unit; each heat exchanger unit includes a heat exchanger unit shell and unit heat exchange fins.

[0006] The heat exchange fins include: a plurality of heat exchange finned tubes; the plurality of heat exchange finned tubes are erected at intervals inside the heat exchanger unit shell along the height direction of the heat exchanger unit shell;

[0007] Both ends of the plurality of heat exchange finned tubes are connected to the hot end air inlet and the hot end air outlet, respectively. The interior of the plurality of heat exchange finned tubes is a hot air flow cavity. The area between the outer wall of the plurality of heat exchange finned tubes and the outer shell of the heat exchanger unit forms a cold air flow cavity. The hot air flow cavity and the cold air flow cavity are isolated from each other.

[0008] The hot airflow chamber is connected to the circuit board housing cavity of the heat dissipation chassis through the hot end air inlet and hot end air outlet; the cold airflow chamber is connected to the external environment through the cold end air inlet and cold end air outlet, so that the cold airflow in the external environment enters the heat exchanger unit shell and exchanges heat with the hot airflow in the hot airflow chamber.

[0009] The present invention also provides a heat dissipation enclosure, which includes the heat exchange device described in any embodiment of the present invention;

[0010] The heat exchange device is located inside the circuit board housing cavity of the heat dissipation chassis and is installed on the front shell of the heat dissipation chassis for dissipating heat from the heat-generating modules inside the heat dissipation chassis.

[0011] Beneficial effects:

[0012] This utility model provides a heat exchange device and heat dissipation casing. Inside the heat exchanger unit's outer shell, individual heat exchange fins extending along the height direction are arranged. Each individual heat exchange fin includes multiple heat exchange finned tubes. The interior of each heat exchange finned tube forms a hot airflow cavity, and the area between the heat exchanger unit's outer shell and the outer wall of the heat exchange finned tubes forms a cold airflow cavity. This effectively divides the interior of the heat exchanger unit's outer shell into mutually isolated hot and cold airflow cavities. When the hot and cold airflows exchange heat through the heat exchange finned tubes, the heat conduction path is along the thickness direction of the heat exchange finned tube's sidewall, effectively reducing the heat conduction path length, resulting in lower thermal resistance and thus improving heat dissipation efficiency.

[0013] Hot air enters the hot airflow chamber through the hot-end inlet at the top or bottom of the heat exchanger. After heat exchange within the chamber, it exits through the hot-end outlet. Cold air enters the cold airflow chamber through the cold-end inlet. After heat exchange within the chamber, it exits through the cold-end outlet. The hot and cold airflows are isolated from each other. The hot airflow circulates within the hot airflow chamber, and the cold airflow circulates within the cold airflow chamber. They are located on the inner and outer sides of the heat exchange finned tubes, respectively, and heat exchange is completed through the finned tubes. This design ensures high IP protection ratings for the electronic equipment while maintaining high flow and heat exchange efficiency.

[0014] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0016] Figure 1a A schematic diagram of the structure of the first embodiment of the heat exchange device provided by this utility model;

[0017] Figure 1b for Figure 1a The heat exchange device shown is not a schematic diagram of the heat exchanger unit's outer shell.

[0018] Figure 2a for Figure 1a The diagram shows the structure of the heat exchange device installed in the heat dissipation casing.

[0019] Figure 2b for Figure 2a A top-down perspective view;

[0020] Figure 2c for Figure 2b A cross-sectional view along the AA direction;

[0021] Figure 2d for Figure 2b Cross-sectional view along the BB direction;

[0022] Figure 3a for Figure 2b A cross-sectional view along the CC direction;

[0023] Figure 3b for Figure 2d A cross-sectional view along the DD direction;

[0024] Figure 3c for Figure 2d Cross-sectional view along the EE direction;

[0025] Figure 3d for Figure 2d A cross-sectional view along the FF direction;

[0026] Figure 4a A schematic diagram of the structure of the second embodiment of the heat exchange device provided by this utility model;

[0027] Figure 4b for Figure 4a The heat exchange device shown is not a schematic diagram of the heat exchanger unit's outer shell.

[0028] Figure 5a for Figure 4a The diagram shows the structure of the heat exchange device installed in the heat dissipation casing.

[0029] Figure 5b for Figure 5a A top-down perspective view;

[0030] Figure 6a A schematic diagram of the third embodiment of the heat exchange device provided by this utility model;

[0031] Figure 6b for Figure 6a The diagram shows the internal structure of the heat exchange device (the heat exchange finned tubes are in a U-shape).

[0032] Figure 7a for Figure 6a The diagram shows the structure of the heat exchange device installed in the heat dissipation casing.

[0033] Figure 7b for Figure 7a A top-down perspective view (the heat exchange finned tubes are in a square shape);

[0034] Figure 8a for Figure 7b Cross-sectional view along the GG direction;

[0035] Figure 8b for Figure 6b A cross-sectional view along the KK direction;

[0036] Figure 8c for Figure 6a The diagram shows the flow direction of the cold air inside the heat exchange device (from left to right as follows). Figure 7b (Cross-sectional views in the HH, II, and JJ directions).

[0037] Figure 9a for Figure 6a The diagram shows the internal structure of the heat exchange device (the heat exchange finned tubes are long straight heat exchange tubes).

[0038] Figure 9b for Figure 7a Top-view perspective view (the heat exchange finned tubes are long straight heat exchange tubes);

[0039] Figure 9c for Figure 9a A cross-sectional view along the LL direction;

[0040] Figure 9d for Figure 9c Cross-sectional view along the MM direction;

[0041] Figure 10a This is a schematic diagram of the structure at the top of the first sub-gas flow chamber;

[0042] Figure 10b This is a cross-sectional view of a long, straight heat exchanger tube.

[0043] Figure 10c This is a schematic diagram of the first heat exchange structure distribution;

[0044] Figure 10d This is a schematic diagram of the distribution of the second heat exchange structure;

[0045] Figure 11a for Figure 6a The diagram shows the internal structure of the heat exchange device (the heat exchange finned tubes are long straight heat exchange tubes and spiral heat exchange tubes).

[0046] Figure 11b for Figure 7a A top-down perspective view (the heat exchange finned tubes are long straight heat exchange tubes and spiral heat exchange tubes, with the long straight heat exchange tubes located at the four corners and the center of rotation of the spiral heat exchange tubes).

[0047] Figure 11c for Figure 11a Cross-sectional view along the NN direction (the long straight heat exchange tubes are located at the four corners and the center of rotation of the spiral heat exchange tubes).

[0048] Figure 11d A schematic diagram of a heat exchange finned tube with long straight heat exchange tubes located at the four corners and the center of rotation of a spiral heat exchange tube;

[0049] Figure 12a for Figure 7a A top-down perspective view (the heat exchange finned tubes are long straight heat exchange tubes and spiral heat exchange tubes, with the long straight heat exchange tubes located at the periphery and center of rotation of the spiral heat exchange tubes).

[0050] Figure 12b for Figure 11a Cross-sectional view along the NN direction (the long straight heat exchange tube is located at the periphery of the spiral heat exchange tube and the center of rotation).

[0051] Figure 12c This is a schematic diagram of a heat exchange finned tube where a long straight heat exchange tube is located at the periphery and center of rotation of a spiral heat exchange tube.

[0052] Figure label:

[0053] Cooling chassis 100, chassis front panel 101, front panel air inlet 1011, front panel air outlet 1012, circuit board housing cavity 102, heating module 200.

[0054] Heat exchanger unit 1, first heat exchanger unit 1a, second heat exchanger unit 1b, heat exchanger unit shell 10, hot air flow chamber 11, cold air flow chamber 12, sub-cold air flow chamber 121, cold end air inlet 131, cold end air outlet 132, hot end air inlet 141, hot end air outlet 142, transition heat exchange chamber 15, first transition baffle 151, first side plate air passage hole 1511, second transition baffle 152, second side plate air passage hole 1521, first transition chamber 181, second transition chamber 182;

[0055] Individual heat exchange fin 2, narrow fin 21, wide fin 22;

[0056] Heat exchange finned tube 20, narrow finned tube 201, wide finned tube 202, long straight heat exchange tube 2031, spiral heat exchange tube 2032, spiral heat exchange sub-tube 2033;

[0057] Transition baffle 23, transition opening 231, transition sealing 232, transition deflector 233, first guide plate 24, first guide section 241, second guide section 242, second guide plate 25, third guide section 251, fourth guide section 252;

[0058] First hot end manifold 31, first manifold air inlet 311, second hot end manifold 32, second manifold air inlet 321, third hot end manifold 33, third manifold air inlet 331;

[0059] Hot end air intake fan 41, cold end air intake fan 42, hot end air outlet fan 43, cold end air outlet fan 44;

[0060] Baffle 5, baffle opening part 51, baffle sealing part 52, baffle air passage part 53;

[0061] Top partition 61, confluence opening 611, confluence sealing 612, bottom partition 62, air outlet opening 621, air outlet sealing 622, top transition partition 63, top transition opening 631, top transition sealing 632, bottom transition partition 64, bottom transition opening 641, bottom transition sealing 642;

[0062] First hot end flow divider 71, first air outlet confluence 711, second hot end flow divider 72, second air outlet confluence 721;

[0063] First heat exchange structure 81, second heat exchange structure 82; transition heat exchange fins 9, transition finned tubes 90. Detailed Implementation

[0064] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art based on the present utility model are within the protection scope of the present utility model.

[0065] The first embodiment of this utility model provides a heat exchange device, such as... Figures 1a to 2b As shown, Figure 1a This is a schematic diagram of the structure of the first embodiment of the heat exchange device provided by this utility model. Figure 1b for Figure 1a The heat exchange device shown does not include a schematic diagram of the heat exchanger unit's outer casing. Figure 2a for Figure 1a The diagram shown illustrates the structure of the heat exchange device installed in the heat dissipation casing. Figure 2b for Figure 2a A top-view perspective view. In the accompanying drawings, the X and Y directions represent the horizontal direction of the heat exchange device, and the Z direction represents the vertical direction of the heat exchange device. The heat exchange device is installed inside a heat dissipation casing 100. On the side of the heat exchange device that is in contact with the front shell 101 of the heat dissipation casing 100, there is at least one cold-end air inlet 131 and at least one cold-end air outlet 132. The cold-end air outlet 132 is spaced apart from the cold-end air inlet 131. The heat exchange device has a hot-end air inlet 141 and a hot-end air outlet 142 at its top and bottom, respectively. It includes: at least one heat exchanger unit 1; each heat exchanger unit 1 includes: a heat exchanger unit shell 10 and unit heat exchange fins 2; the heat exchange fins 2 include: multiple heat exchange finned tubes 20; the multiple heat exchange finned tubes 20 are spaced apart and erected on the heat exchanger unit shell 10 along its height direction. Inside the heat exchanger housing 100, the two ends of multiple heat exchange finned tubes 20 are connected to the hot end air inlet 141 and the hot end air outlet 142, respectively. The interior of the multiple heat exchange finned tubes 20 is a hot air flow chamber 11. The area between the outer wall of the multiple heat exchange finned tubes 20 and the heat exchanger housing 10 forms a cold air flow chamber 12. The hot air flow chamber 11 and the cold air flow chamber 12 are isolated from each other. The hot air flow chamber 11 is connected to the circuit board receiving cavity 102 of the heat dissipation box 100 through the hot end air inlet 141 and the hot end air outlet 142. The cold air flow chamber 12 is connected to the external environment through the cold end air inlet 131 and the cold end air outlet 132, so that the cold air from the external environment enters the heat exchanger housing 10 and exchanges heat with the hot air flow in the hot air flow chamber 11.

[0066] In this embodiment, a single-unit heat exchange fin 2 extending along the height direction is provided inside the heat exchanger unit shell 10. The single-unit heat exchange fin 2 includes multiple heat exchange finned tubes 20. The interior of each heat exchange finned tube 20 forms a hot airflow cavity 11, and the area between the heat exchanger unit shell 10 and the outer wall of the heat exchange finned tube 20 forms a cold airflow cavity 12. This effectively divides the interior of the heat exchanger unit shell 10 into mutually isolated hot airflow cavities 11 and cold airflow cavities 12. When hot and cold airflows exchange heat through the heat exchange finned tubes 20, the heat conduction path is along the thickness direction of the sidewall of the heat exchange finned tube 20, effectively reducing the heat conduction path length and resulting in lower thermal resistance, thereby improving heat dissipation efficiency.

[0067] Hot air enters the hot airflow chamber 11 through the hot-end air inlet 141 at the top or bottom of the heat exchange device. After heat exchange inside the hot airflow chamber 11, it exits the heat exchange device through the hot-end air outlet 142. Cold air enters the cold airflow chamber 12 through the cold-end air inlet 131. After heat exchange inside the cold airflow chamber 12, it exits the heat exchange device through the cold-end air outlet 132. The hot and cold airflows are isolated from each other. The hot airflow circulates within the hot airflow chamber 11, and the cold airflow circulates within the cold airflow chamber 12. They are located on the inner and outer sides of the heat exchange finned tube 20, respectively, and heat exchange is completed through the heat exchange finned tube 20. This ensures high IP protection levels for electronic equipment while maintaining high flow and heat exchange efficiency.

[0068] In some embodiments of this utility model, such as Figure 2c and Figure 2d As shown, Figure 2c for Figure 2b Sectional view along the AA direction. Figure 2d for Figure 2b A cross-sectional view along the BB direction. Each heat exchanger unit 1 has a top partition 61 at its top of its outer shell 10. The top partition 61 has a confluence opening 611 and a confluence sealing 612. The confluence opening 611 corresponds to the hot-end air inlet 141, and the remaining positions on the top partition 61 are confluence sealing 612. The hot-end air inlet 141 communicates with the circuit board receiving cavity 102 through the top partition 61 and is connected to the cold airflow. The cavity 12 is isolated; a bottom partition 62 is provided at the bottom end of the heat exchanger unit housing 10; the bottom partition 62 has an air outlet opening 621 and an air outlet sealing part 622; the air outlet opening 621 of the bottom partition 62 corresponds to the position of the hot end air outlet 142, and the remaining positions on the bottom partition 62, except for the air outlet opening 621, are air outlet sealing parts 622; the hot end air outlet 142 is connected to the circuit board receiving cavity 102 through the bottom partition 62, and is isolated from the cold air flow cavity 12.

[0069] In this embodiment, each heat exchanger unit 1 has a top partition 61 at its top end of the heat exchanger unit housing 10. Furthermore, the top partition 61 has a flow-through opening 611 and a flow-through sealing portion 612. The flow-through opening 611 is a through hole penetrating the top partition 61, and the first hot-end flow chamber 31 is connected to the hot air flow chamber 11 inside the heat exchange finned tube 20 through the flow-through opening 611. The cold air flow chamber is isolated from the first hot-end flow chamber 31 through the flow-through sealing portion 612. This ensures a high IP protection level for the circuit board housing 102.

[0070] At the bottom of the heat exchanger unit housing 10, a bottom partition 62 corresponding to the top partition 61 is also provided. The bottom partition 62 has an air outlet opening 621 and an air outlet sealing part 622. Similar to the top partition 61, the circuit board receiving cavity 102 is connected to the hot air flow cavity 11 through the air outlet opening 621 and isolated from the cold air flow cavity 12 through the air outlet sealing part 622, thereby ensuring the high IP protection level of the circuit board receiving cavity 102. Under the action of the air outlet opening 621, the hot air flow that has completed heat exchange flows out from the heat exchanger unit 1 and re-enters the circuit board receiving cavity 102, further dissipating heat for the heating module 200. At the same time, the hot air flow in the first hot end confluence cavity 31 can enter the hot air flow cavity 11 formed inside each heat exchange finned tube 20 more evenly under the rectification effect of the confluence opening 611 on the top partition 61.

[0071] In the first embodiment of this utility model, as Figure 1a and Figure 1bAs shown, there is one heat exchanger unit 1; the side of the heat exchanger unit shell 10 of the heat exchanger unit 1 that is in contact with the front shell 101 of the heat dissipation box 100 is provided with a cold end air inlet 131 and a cold end air outlet 132; the top of the heat exchanger unit shell 10 of the heat exchanger unit 1 is provided with a hot end air inlet 141; the end of the heat exchanger unit shell 10 of the heat exchanger unit 1 away from the hot end air inlet 141 is provided with a hot end air outlet 142. The top and bottom ends of the individual heat exchange fins 2 are flush with the top and bottom ends of the heat exchanger unit shell 10, respectively; the top openings of the plurality of heat exchange fin tubes 20 are formed as hot-end air inlets 141, and the bottom openings are formed as hot-end air outlets 142; the heat exchanger unit 1 also includes: a first hot-end manifold 31 disposed above the top of the heat exchanger unit shell 10; at least one side wall of the first hot-end manifold 31, excluding the side facing the front shell 101 of the chassis, is... The first hot end junction cavity 31 is provided with a first confluence cavity air inlet 311; the bottom of the first hot end junction cavity 31 is connected to the hot end air inlet 141 and isolated from the cold air flow cavity 12; the bottom openings of the multiple heat exchange finned tubes 20 are isolated from the cold air flow cavity 12; a hot end air inlet fan 41 is installed in the first hot end junction cavity 31 to draw hot air into the first hot end junction cavity 31; a cold end air inlet fan 42 is installed in the cold end air inlet 131 to draw cold air into the cold air flow cavity 12.

[0072] Alternatively, in other embodiments, the hot-end air inlet 141 and the first hot-end manifold 31 can also be located at the bottom of the heat exchanger unit housing 10. In this case, the bottom openings of the plurality of heat exchange finned tubes 20 are formed as hot-end air inlets 141, and the top openings are formed as hot-end air outlets 142. At this time, the first hot-end manifold 31 is located below the hot-end air inlet 141, and the top of the first hot-end manifold 31 is connected to the hot-end air inlet 141. Hot airflow can flow into the interior of the heat exchanger unit 1 from the first hot-end manifold 31 at the bottom of the heat exchanger unit 1, and flow back to the circuit board receiving cavity 102 from the hot-end air outlet 142 at the top of the heat exchanger unit 1.

[0073] In this embodiment, the individual heat exchange fins 2 divide the interior of the heat exchanger unit housing 10 into mutually isolated hot airflow chambers 11 and cold airflow chambers 12. A cold-end inlet fan 42 is disposed in the cold airflow chamber 12, corresponding to the cold-end inlet 131, and can draw cold airflow from the external environment into the cold airflow chamber 12. Simultaneously, a first hot-end confluence chamber 31, communicating with the hot airflow chamber 11, is provided at the top of the heat exchanger unit housing 10. The top opening of the heat exchange fin tube 20 is formed as a hot-end inlet 141, communicating with the first hot-end confluence chamber 31. The hot-end inlet fan 41, disposed in the first hot-end confluence chamber 31, can draw hot airflow from the circuit board receiving cavity 102 through the first confluence chamber inlet 311 into the first hot-end confluence chamber 31, and then flow into the hot airflow chamber 11. The first hot-end confluence chamber 31 is connected to the hot airflow chamber 11 but isolated from the cold airflow chamber 12. This allows the hot airflow to flow back into the circuit board housing cavity 102 through the hot end outlet 142 formed at the bottom of the heat exchange finned tube 20. The top partition 61 can serve as the top surface of the heat exchanger unit housing 10, the bottom surface of the first hot end confluence cavity 31, or the common surface of the heat exchanger unit housing 10 and the first hot end confluence cavity 31.

[0074] Specifically, the cold airflow from the external environment is drawn into the cold airflow cavity 12 through the cold air inlet 131 by the cold air inlet fan 42; the hot airflow in the circuit board housing cavity 102 is drawn into the first hot airflow cavity 31 through the first hot airflow cavity inlet 311 by the hot air inlet fan 41, and then guided into the hot airflow cavity 11 inside the heat exchange finned tube 20. The hot and cold airflows inside the heat exchanger unit housing 10 are isolated from each other by the unit heat exchange fins 2. The heat of the hot airflow in the hot airflow cavity 11 is transferred to the cold airflow in the cold airflow cavity 12 through the outer wall of the heat exchange finned tube 20. The heat conduction path is along the wall thickness direction of the unit heat exchange fins 2, resulting in low thermal resistance and effectively improving heat dissipation efficiency.

[0075] The cold airflow after heat exchange flows downward along the height direction of the heat exchanger unit shell 10 and is discharged to the external environment through the cold end air outlet 132; the hot airflow after heat exchange flows downward along the extension direction of the heat exchange finned tube 20 and flows back to the circuit board receiving cavity 102 through the hot end air outlet 142 formed by the bottom pipe opening of the heat exchange finned tube 20.

[0076] In actual production, the positions of the hot-end air inlet 141 and the hot-end air outlet 142 can be interchanged. That is, the hot-end air inlet 141 is the bottom opening of the heat exchange finned tube 20, and the hot-end air outlet 142 is the top opening of the heat exchange finned tube 20. The first hot-end manifold 31 and the hot-end air inlet fan 41 are located at the bottom of the heat exchanger unit shell 10. Furthermore, the positions of the cold-end air inlet 131 and the cold-end air outlet 132 can be interchanged.

[0077] In other embodiments, the airflow direction can be changed simply by altering the airflow direction of the hot-end fan and the cold-end fan. Specifically, the airflow direction of the hot-end intake fan 41 is adjusted to draw air from the hot airflow chamber 11, thereby directing the hot airflow within the hot airflow chamber 11 towards the circuit board receiving cavity 102. The airflow direction of the cold-end intake fan 42 is adjusted to draw air from the cold airflow chamber 12, thereby directing the cold airflow within the cold airflow chamber 12 towards the external environment.

[0078] At this time, a negative pressure environment is formed in the hot airflow cavity 11 under the action of the hot end air intake fan 41. The hot airflow in the circuit board receiving cavity 102 enters the hot airflow cavity 11 through the hot end air outlet 142, and after heat exchange, flows back to the circuit board receiving cavity 102 from the first hot end confluence cavity 31.

[0079] Similarly, under the action of the cold end intake fan 42, a negative pressure environment is formed in the cold airflow cavity 12. The cold airflow from the external environment enters the cold airflow cavity 12 through the cold end outlet 132, and after heat exchange, it is discharged to the external environment from the cold end inlet 131.

[0080] Thus, after the fan airflow direction changes: the original hot-end air inlet 141 becomes the hot-end air outlet, and the original hot-end air outlet 142 becomes the hot-end air inlet. Simultaneously, the first hot-end manifold 31 becomes a hot-end distribution chamber for discharging hot air, and the hot-end air inlet fan 41 becomes a hot-end air outlet fan; the cold-end air inlet 131 becomes a cold-end air outlet, the cold-end air outlet 132 becomes a cold-end air inlet, and the cold-end air inlet fan 42 becomes a cold-end air outlet fan. That is, their positional relationship remains unchanged, but their names change with the fan airflow direction.

[0081] The following description uses the first embodiment of this utility model as an example.

[0082] In the first embodiment of this utility model, as Figure 1bAs shown, multiple heat exchange finned tubes 20 are arranged in a single-line array of U-shaped tubes; the airflow channels inside the U-shaped tubes form a hot airflow cavity 11; the area between the outer wall of the U-shaped tubes and the heat exchanger unit shell 10 forms a cold airflow cavity 12; the unit heat exchange fins 2 include: narrow fins 21 and wide fins 22; the narrow fins 21 include narrow finned tubes 201; the wide fins 22 include wide finned tubes 202; the wide finned tubes 202 are perpendicular to the front shell 101 of the chassis. The width in the direction is greater than the width of the narrow finned tube 201 in the direction perpendicular to the front shell 101 of the chassis; the narrow finned tube 201 is fixed to the top partition 61; the wide finned tube 202 is fixed to the bottom partition 62; the side of the narrow finned tube 201 facing the front shell 101 of the chassis and the side of the wide finned tube 202 facing the front shell 101 of the chassis form a stepped structure; the cold end inlet fan 42 or the cold end outlet fan 44 is installed in the accommodating space formed by the stepped structure and the heat exchanger unit shell 10.

[0083] In this embodiment, the narrow fin 21 includes a narrow finned tube 201; the wide fin 22 includes a wide finned tube 202. The narrow finned tube 201 and the wide finned tube 202 form a stepped structure, the width of which is not less than the thickness of the cold end air intake fan 42, for mounting the cold end air intake fan 42.

[0084] Preferably, the U-shaped tube can be a narrow U-shaped structure.

[0085] In some embodiments of this utility model, such as Figure 3b and Figure 3c As shown, the hot airflow chamber 11 of the narrow finned tube 201 is connected to a portion of the hot airflow chamber 11 of the wide finned tube 202; a transition baffle 23 is provided at the connection between the narrow finned tube 201 and the wide finned tube 202; the transition baffle 23 has a transition opening 231, a transition sealing 232, and a transition deflector 233; the shape and position of the transition opening 231 correspond to the narrow finned tube 201, and are used to avoid the outer sidewalls of each narrow finned tube 201; the three sides of the transition sealing 232 are sealed to the inner sidewall of the heat exchanger unit shell 10; the transition deflector 233 is provided on the side of the transition sealing 232 that is not sealed to the heat exchanger unit shell 10, and is used to connect the cold airflow chamber 12 above and below the transition baffle 23; in the stepped structure, the portion of the wide finned tube 202 that is not connected to the hot airflow chamber 11 of the narrow finned tube 201 is isolated from the cold airflow chamber 12 through the transition sealing 232.

[0086] In this embodiment, a transition baffle 23 is provided at the connection between the narrow finned tube 201 and the wide finned tube 202. The transition opening 231 of the transition baffle 23 corresponds to the shape and position of the opening of the narrow finned tube 201, allowing the narrow finned tube 201 to pass through the transition opening 231. Furthermore, a sealing treatment is performed at the connection between the narrow finned tube 201 and the transition opening 231 to form a complete assembly. The transition sealing portion 232 of the transition baffle 23 seals the inner wall of the heat exchanger unit housing 10 on all three sides, sealing the portion of the wide finned tube 202 that is not connected to the hot airflow chamber 11 of the narrow finned tube 201, thereby isolating the hot airflow chamber 11 of the wide finned tube 202 from the cold airflow chamber 12. The transition baffle 233 is located on the side of the transition sealing section 232 that is not sealed with the heat exchanger unit housing 10. This allows the cold airflow to fully exchange heat with the hot airflow in the narrow finned tube 201 above the transition baffle 23 after entering the heat exchanger unit housing 10. The cold airflow is then concentrated by the transition baffle 233 and flows into the cold airflow cavity 12 below the transition baffle 23, where it continues to exchange heat with the hot airflow in the wide finned tube 202.

[0087] For details, please see Figures 3a to 3d , Figure 3a for Figure 2b A cross-sectional view along the CC direction; Figure 3b for Figure 2d A cross-sectional view along the DD direction; Figure 3c for Figure 2d Sectional view along the EE direction. Figure 3d for Figure 2d A sectional view along the FF direction. Wherein, Figure 3c A cross-section of the transition partition 23 is shown. The transition partition 23 is located between the narrow finned tube 201 and the wide finned tube 202. The shape and position of the transition opening 231 on the transition partition 23 correspond to the opening of the narrow finned tube 201.

[0088] In some embodiments of this utility model, such as Figure 1b and Figure 2d As shown, multiple baffles 5 are sequentially and spaced apart from top to bottom on the wide finned tube 202, dividing the cold airflow cavity 12 below the transition baffle 23 into multiple sub-cold airflow cavities 121; each baffle 5 has a baffle opening part 51, a baffle sealing part 52, and a baffle air passage part 53; the shape and position of the baffle opening part 51 correspond to the wide finned tube 202, and are used to avoid the outer side wall of each wide finned tube 202; the three sides of the baffle sealing part 52 are sealed to the inner side wall of the heat exchanger unit shell 10; the baffle air passage part 53 is provided on the side of the baffle sealing part 52 that is not sealed to the heat exchanger unit shell 10, and is used to connect the multiple sub-cold airflow cavities 121.

[0089] In this embodiment, the baffle opening 51 is a through hole penetrating the baffle plate 5, and its shape corresponds to the opening of the wide finned tube 202, allowing the wide finned tube 202 to pass through the baffle opening 51. The three sides of the baffle sealing part 52 are respectively sealed to the inner wall of the heat exchanger unit housing 10, preventing the cold airflow from flowing directly downwards along the height direction. A baffle air passage 53 is provided on the remaining side of the baffle plate 5 that is not sealed to the heat exchanger unit housing 10, allowing the cold airflow in the cold airflow chamber 12 to pass through. This allows the formation of multiple interconnected sub-cold airflow chambers 121, increasing the contact time between the cold airflow in each sub-cold airflow chamber 121 and the unit heat exchange fins 2, thereby achieving sufficient heat exchange between the hot and cold airflows. See also... Figure 3d , Figure 3d The cross-section of the baffle 5 is shown. The baffle opening 51 is a through hole that passes through the baffle 5. Its shape corresponds to the opening of the wide finned tube 202 so that the wide finned tube 202 can pass through the baffle opening 51.

[0090] Among them, the direction of the deflector section 53 of the baffle plate 5 adjacent to the transition baffle plate 23 is opposite to the direction of the transition deflector section 233 of the transition baffle plate 23; the direction of the deflector section 53 of the adjacent baffle plate 5 is opposite.

[0091] In this embodiment, the airflow deflectors 53 are distributed in two ways on the baffle plate 5: one is located on the side away from the front housing 101 of the chassis, and the other is located on the side closer to the front housing 101 of the chassis. These two distributions of baffle plates 5 can be alternately arranged on the wide finned tube 202, that is, adjacent airflow deflectors 53 are arranged in opposite positions. Thus, as... Figure 2d As shown, the presence of the baffle 5 and the baffle air passage 53 provides a curved flow path or an S-shaped flow path for the cold air in the cold air cavity 12. As the cold air flows from top to bottom, it needs to pass through the baffle air passage 53 that are alternately distributed on both sides and present an S-shaped flow path, which effectively increases the convection path and convection time between the cold air and the heat exchange fins, thereby achieving sufficient heat exchange between the cold and hot air.

[0092] For details, see Figure 2c and Figure 2dHot air in the circuit board housing 102 enters the first hot-end confluence cavity 31 through the first confluence cavity inlet 311, and then enters the hot airflow cavity 11 inside the heat exchange finned tube 20. It flows downwards in a straight line within the hot airflow cavity 11, and finally exits from the hot-end outlet 142 at the bottom of the heat exchanger unit housing 10, returning to the circuit board housing 102 to dissipate heat for the heat-generating module 200. Cold air from the external environment enters the cold airflow cavity 12 through the cold-end inlet 131, and then flows in an S-shaped path within the cold airflow cavity 12. After multiple bends, it is discharged to the external environment from the cold-end outlet 132. During this bends, the cold air absorbs a significant amount of heat, meaning the hot air releases a substantial amount of heat, allowing for sufficient heat exchange. Therefore, the temperature of the hot air returning to the circuit board housing 102 will be even lower, greatly improving the reliability of heat dissipation.

[0093] like Figure 3a As shown, Figure 3a This describes the flow of hot air from top to bottom inside the heat exchanger unit housing 10. Specifically, the hot air flows within the hot airflow cavity 11 formed inside the heat exchange finned tube 20. After entering the first hot end confluence cavity 31, the hot air flows through the confluence opening 611 on the top partition 61 into the hot airflow cavity 11. After heat exchange, the hot air flows back to the circuit board receiving cavity 102 through the air outlet opening 621 on the bottom partition 62. During this process, both the confluence opening 611 and the air outlet opening 621 are connected to the hot airflow cavity 11 and isolated from the cold airflow cavity 12.

[0094] See Figures 3b to 3d ,in, Figure 3b The cross-section of the top partition 61 is shown. The confluence opening 611 on the top partition 61 enables the connection between the first hot end confluence cavity 31 and the hot air flow cavity 11. The shape and position of the confluence opening 611 correspond to the shape and position of the inlet of the heat exchange finned tube 20. Figure 3d The cross-section of the baffle 5 is shown. The baffle opening 51 is a through hole that passes through the baffle 5. Its shape corresponds to the opening of the heat exchange finned tube 20 so that the heat exchange finned tube 20 can pass through the baffle opening 51.

[0095] The flow-through section 53 of the baffle 5 adjacent to the transition baffle 23 is in the opposite direction to the transition baffle 23, and the flow-through sections 53 of adjacent baffles 5 are in the opposite direction. This allows the cold airflow to form an S-shaped flow channel as it flows along the height within the heat exchanger unit shell 10. This increases the convection path and time between the cold airflow and the heat exchange fins, contributing to more efficient heat exchange.

[0096] The assembly and connection between the narrow finned tube 201, the wide finned tube 202 and each baffle 5 can be achieved by welding or by 3D printing in one piece, as long as they can be assembled together and the sealing is guaranteed.

[0097] In the second embodiment of this utility model, as follows: Figures 4a to 5b As shown, Figure 4a This is a schematic diagram of the second embodiment of the heat exchange device provided by this utility model. Figure 4b for Figure 4a The heat exchange device shown does not include a schematic diagram of the heat exchanger unit's outer casing. Figure 5a for Figure 4a The diagram shown illustrates the structure of the heat exchange device installed in the heat dissipation casing. Figure 5b for Figure 5a The top-view perspective view shows that there are multiple heat exchanger units 1; the heat exchanger unit shells 10 of the multiple heat exchanger units 1 are arranged side by side at intervals; each heat exchanger unit shell 10 of the heat exchanger unit 1 has a cold end air inlet 131 and a cold end air outlet 132 on the side that is in contact with the front shell 101 of the heat dissipation casing 100; each heat exchanger unit shell 10 of the heat exchanger unit 1 has a hot end air inlet 141 at its top; and each heat exchanger unit shell 10 of the heat exchanger unit 1 has a hot end air outlet 142 at the end away from the hot end air inlet 141.

[0098] As mentioned earlier, the hot-end air inlet 141 of each heat exchanger unit 1 can be located at the bottom of the heat exchanger unit housing 10. Further details will not be provided here.

[0099] The second embodiment differs from the first embodiment in that, for example... Figure 4a As shown, the heat exchanger units are arranged in an array along the Y direction. Furthermore, each heat exchanger unit 1 has a hot-end air inlet 141, a hot-end air outlet 142, a cold-end air inlet 131, and a cold-end air outlet 132 on its outer shell 10. Multiple heat exchanger units 1 are isolated from each other, thus forming a parallel structure.

[0100] In some embodiments of this utility model, such as Figure 4a and Figure 4bAs shown, the top and bottom ends of the heat exchange fins 2 of each heat exchanger unit 1 are flush with the top and bottom ends of the heat exchanger unit shell 10 of that heat exchanger unit 1, respectively; the top openings of the plurality of heat exchange finned tubes 20 are formed as hot-end air inlets 141, and the bottom openings are formed as hot-end air outlets 142; the top ends of the plurality of heat exchanger units 1 are connected to a second hot-end manifold 32; the second hot-end manifold 32 has a second manifold air inlet 321 on the side facing the circuit board receiving cavity 102 of the heat dissipation casing 100; the bottom of the second hot-end manifold 32 is connected to the hot-end air inlet 141 of each heat exchanger unit shell 10, and is isolated from the cold air flow cavity 12 of each heat exchanger unit shell 10; the bottom openings of the plurality of heat exchange finned tubes 20 of each heat exchanger unit shell 10 are connected to the heat exchanger unit shell 10. The cold airflow cavity 12 of the single-unit shell 10 is isolated; in the second hot end confluence cavity 32, the top of each heat exchanger unit 1 is equipped with a hot end air intake fan 41 to draw hot airflow into the second hot end confluence cavity 32; the cold end air inlet 131 of each heat exchanger unit 1 is equipped with a cold end air intake fan 42 to draw cold airflow into the cold airflow cavity 12; the bottom ends of multiple heat exchanger units 1 are connected to a first hot end diversion cavity 71; the interior of the first hot end diversion cavity 71 is connected to the hot end air outlet 142 of each heat exchanger unit 1 and is isolated from the cold airflow cavity 12 of all heat exchanger units 1; the first hot end diversion cavity 71 has a first air outlet confluence 711 on the side facing the circuit board receiving cavity 102 of the heat dissipation chassis 100 to guide the heat exchanged hot airflow back to the circuit board receiving cavity 102.

[0101] In this embodiment, a unified second hot end manifold 32 is provided for each heat exchanger unit 1, and a hot end air intake fan 41 for each heat exchanger unit 1 is provided inside. A second manifold air inlet 321 for each heat exchanger unit 1 is provided on the side wall of the second hot end manifold 32. In addition, a unified first hot end diversion cavity 71 is provided at the bottom of the heat exchanger unit, and a first air outlet manifold 711 is provided on the side wall of the first hot end diversion cavity 71. Preferably, the first air outlet manifold 711 is provided on the side wall facing the heating module 200 in the circuit board receiving cavity 102.

[0102] The function of the second hot end manifold 32 is the same as that of the first hot end manifold 31, and will not be described in detail here. The first hot end branching cavity 71 locally integrates the airflow with a certain temperature drop from each hot airflow cavity 11, and then, under the guidance of the first air outlet manifold 711, it flows to the heating module 200 located at the far end to dissipate heat and cool it down.

[0103] The cold-end air inlet 131 and cold-end air outlet 132 are similar to those in the first embodiment, differing only in quantity, and will not be described in detail here. In this embodiment, the heat exchanger unit 1 is arrayed in two groups. In actual production, the number of arrays can be adjusted to more groups according to actual needs, and no further restrictions are imposed here. In the second embodiment of this utility model, the structure of the heat exchange fins 2 in the shell 10 of each heat exchanger unit is the same as that in the aforementioned embodiment, and will not be described in detail here.

[0104] In the heat exchange device provided in the third embodiment of this utility model, such as Figures 6a to 7b As shown, Figure 6a This is a schematic diagram of the third embodiment of the heat exchange device provided by this utility model. Figure 6b for Figure 6a The diagram shows the internal structure of the heat exchange device (the heat exchange finned tubes are in the shape of a square). Figure 7a for Figure 6a The diagram shown illustrates the structure of the heat exchange device installed in the heat dissipation casing. Figure 7b for Figure 7a A top-view perspective view (the heat exchange finned tubes are U-shaped). The heat exchange device also includes: a transition heat exchange chamber 15; two heat exchanger units 1, respectively disposed on both sides of the transition heat exchange chamber 15; and the two heat exchanger units 1 are inverted relative to each other in the height direction; wherein, a cold end air inlet 131 is disposed on the side where the heat exchanger unit shell 10 of one of the heat exchanger units 1 is attached to the front shell 101 of the heat dissipation box 100; a cold end air outlet 132 is disposed on the side where the other heat exchanger unit shell 10 is attached to the front shell 101 of the heat dissipation box 100; a hot end air inlet 141 is disposed at the top or bottom of each heat exchanger unit shell 10 and the transition heat exchange chamber 15; a hot end air outlet 142 is disposed at the end of each heat exchanger unit shell 10 and the transition heat exchange chamber 15 away from the hot end air inlet 141; the transition heat exchange chamber Within the heat exchange chamber 15, transition heat exchange fins 9 are provided; the transition heat exchange fins 9 include: multiple transition finned tubes 90; the multiple transition finned tubes 90 are erected at intervals inside the transition heat exchange chamber 15 along the height direction of the transition heat exchange chamber 15; the two ends of the multiple transition finned tubes 90 are respectively connected to the hot end air inlet 141 and the hot end air outlet 142 of the transition heat exchange chamber 15, and the interior of the multiple transition finned tubes 90 is a hot air flow chamber 11; the area between the outer wall of the multiple transition finned tubes 90 and the transition heat exchange chamber 15 forms a cold air flow chamber 12; the hot air flow chamber 11 and the cold air flow chamber 12 are isolated from each other; the hot air flow chambers 11 of the two heat exchanger units 1 are respectively connected to the hot air flow chambers 11 of the transition heat exchange chamber 15; the cold air flow chambers 12 of the two heat exchanger units 1 are respectively connected to the cold air flow chambers 12 of the transition heat exchange chamber 15.

[0105] In other embodiments, the hot-end air inlet 141 of the transition heat exchange cavity 15 may be located at the top of the transition heat exchange cavity 15. In this case, the hot airflow enters the interior of one of the heat exchanger units 1 from the hot-end air inlet 141 at the bottom of the heat exchanger unit 1 and flows upward, enters the hot-end air inlet 141 at the top of the transition heat exchange cavity 15 from the hot-end air outlet 142 at the top of the heat exchanger unit 1 and flows downward, enters the hot-end air inlet 141 at the bottom of the other heat exchanger unit 1 from the hot-end air outlet 142 at the bottom of the transition heat exchange cavity 15 and flows upward, and finally flows back to the circuit board receiving cavity 102 through the hot-end air outlet 142 at the top of the heat exchanger unit 1.

[0106] The difference between the third embodiment of this utility model and the second embodiment is that, in this embodiment of the utility model, there are two heat exchanger units 1 connected in series in a single path and a transition heat exchange cavity 15.

[0107] In this embodiment, two heat exchanger units 1 and a transition heat exchange chamber 15 are arranged side by side. A cold-end air inlet 131 and a cold-end air outlet 132 are respectively located in the two heat exchanger units 1. The two heat exchanger units 1 are connected through the transition heat exchange chamber 15. The interior of the transition finned tube 90 within the transition heat exchange chamber 15 is a hot air flow chamber 11, capable of transporting hot air from the bottom to the top of the transition heat exchange chamber 15. This allows the hot air to flow in an S-shape within the heat exchange device, thereby increasing the heat exchange time between the hot and cold air streams and ensuring sufficient heat exchange.

[0108] In some embodiments of this utility model, such as Figure 6a and Figure 6bAs shown, the top and bottom ends of the heat exchange fins 2 of each heat exchanger unit 1 are flush with the top and bottom ends of the heat exchanger unit shell 10 of that heat exchanger unit 1, respectively; the top openings of the plurality of heat exchange finned tubes 20 are formed as hot-end air inlets 141, and the bottom openings are formed as hot-end air outlets 142; the top and bottom ends of the transition heat exchange fins 9 of the transition heat exchange chamber 15 are flush with the top and bottom ends of the transition heat exchange chamber 15, respectively; the top openings of the plurality of transition finned tubes 90 are formed as hot-end air inlets 141, and the bottom openings are formed as... A hot-end air outlet 142; the top of one of the heat exchanger units 1 is connected to a third hot-end manifold 33 to form a first heat exchanger unit 1a; the third hot-end manifold 33 has a third manifold air inlet 331 on the side facing the circuit board receiving cavity 102 of the heat dissipation casing 100; the bottom of the third hot-end manifold 33 is connected to the hot-end air inlet 141 of the heat exchanger unit 1 and isolated from the cold air flow cavity 12 of the heat exchanger unit 1; multiple heat exchange finned tubes 2 of each heat exchanger unit housing 10 The bottom port of heat exchanger 10 is isolated from the cold airflow cavity 12 of the heat exchanger unit housing 10; a hot-end air intake fan 41 is installed in the third hot-end manifold 33 to draw hot airflow into the third hot-end manifold 33; a cold-end air intake fan 42 is installed in the cold-end air inlet 131 to draw cold airflow into the cold airflow cavity 12; a second hot-end diversion cavity 72 is provided at the bottom end of another heat exchanger unit 1, forming a second heat exchanger unit 1b; the interior of the second hot-end diversion cavity 72 is connected to the hot-end outlet of the heat exchanger unit 1. The air vent 142 is connected to and isolated from the cold airflow cavity 12 of the heat exchanger unit 1; the second hot end distribution cavity 72 has a second air outlet 721 on the side facing the circuit board receiving cavity 102 of the heat dissipation box 100, so as to guide the heat exchanged hot airflow back to the circuit board receiving cavity 102; a hot end air outlet fan 43 is installed in the second hot end distribution cavity 72 to guide the hot airflow to the circuit board receiving cavity 102; the cold end air outlet 132 is equipped with a cold end air outlet fan 44 to guide the cold airflow to the external environment.

[0109] In this embodiment, a third hot-end manifold 33 can be provided at the top of the first heat exchanger unit 1a, and a second hot-end branching cavity 72 can be provided at the bottom of the second heat exchanger unit 1b. The third hot-end manifold 33 and the second hot-end branching cavity 72 have the same function as in the previous embodiment, and the top baffle 61 and the bottom baffle 62 have the same function as in the previous embodiment, and will not be described in detail here.

[0110] The hot-end exhaust fan 43 extracts hot air from the heat exchanger unit housing 10 and directs it into the circuit board receiving cavity 102. The cold-end exhaust fan 44 extracts cold air from the heat exchanger unit housing 10 and directs it to the external environment. The hot-end exhaust fan 43 and the hot-end intake fan 41 work together to enhance the hot air pressure, thereby overcoming the resistance of a single-path series hot air duct. The cold-end exhaust fan 44 and the cold-end intake fan 42 work together to enhance the cold air pressure, thereby overcoming the resistance of a single-path series cold air duct.

[0111] In actual production, in addition to the first heat exchanger unit 1a, the transition heat exchange cavity 15 and the second heat exchanger unit 1b, other numbers of sub-flow cavities can be added, as long as they can achieve the bending and mixing flow of hot and cold air in 3D space.

[0112] In some embodiments of this utility model, such as Figure 6b As shown, a top transition partition 63 is provided at the top of the transition heat exchange chamber 15; a top transition opening 631 and a top transition sealing 632 are provided on the top transition partition 63; the top transition opening 631 of the top transition partition 63 corresponds to the position of the hot end air outlet 142 of the transition heat exchange chamber 15, and the remaining positions on the top partition 61, except for the top transition opening 631, are top transition sealing 632; the hot end air outlet 142 is connected to the second heat exchanger unit 1b through the top partition 61, and the second heat exchanger unit 1b is connected to the circuit board receiving cavity 102 and isolated from the cold air flow cavity 12; At the bottom end of the transition heat exchange cavity 15, a bottom transition partition 64 is provided; the bottom transition partition 64 has a bottom transition open portion 641 and a bottom transition sealed portion 642; the bottom transition open portion 641 of the bottom transition partition 64 corresponds to the position of the hot end air inlet 141 of the transition heat exchange cavity 15, and the remaining positions on the bottom transition partition 64, except for the bottom transition open portion 641, are bottom transition sealed portions 642; the hot end air inlet 141 is connected to the first heat exchanger unit 1a through the bottom transition partition 64, and the first heat exchanger unit 1a is connected to the circuit board receiving cavity 102 and isolated from the cold air flow cavity 12.

[0113] In this embodiment, a top transition partition 63 is provided at the top of the transition heat exchange cavity 15; and a bottom transition partition 64 is provided at the bottom of the transition heat exchange cavity 15. Both the top transition partition 63 and the bottom transition partition 64 are used to indirectly connect the hot air flow cavity 11 of the transition heat exchange cavity 15 with the circuit board receiving cavity 102, and to isolate it from the cold air flow cavity 12.

[0114] In some embodiments of this utility model, such as Figures 8a to 8c As shown, Figure 8a for Figure 7b Cross-sectional view along the GG direction. Figure 8b for Figure 6bCross-sectional view along the KK direction. Figure 8c for Figure 6a The schematic diagram of the flow direction of the cold air inside the heat exchange device shown is as follows (from left to right): Figure 7b Cross-sectional views along the HH, II, and JJ directions. A first transition cavity 181 is provided at the bottom of the first heat exchanger unit 1a and the bottom of the transition heat exchange cavity 15; the hot airflow cavity 11 of the first heat exchanger unit 1a is connected to the first transition cavity 181 through the air outlet opening 621 of the bottom partition 62; the cold airflow cavity 12 of the first heat exchanger unit 1a is isolated from the first transition cavity 181 through the air outlet sealing part 622 of the bottom partition 62; the hot airflow cavity 11 of the transition heat exchange cavity 15 is connected to the first transition cavity 181 through the bottom transition opening 641 of the bottom transition partition 64; the cold airflow cavity 12 of the transition heat exchange cavity 15 is isolated from the first transition cavity 181 through the bottom transition sealing part 642 of the bottom transition partition 64; the hot airflow cavity 11 of the first heat exchanger unit 1a and the hot airflow cavity 11 of the transition heat exchange cavity 15 are connected through the first transition cavity 181. A second transition cavity 182 is provided at the top of the transition heat exchange cavity 15 and the top of the second heat exchanger unit 1b; the hot air flow cavity 11 of the transition heat exchange cavity 15 is connected to the second transition cavity 182 through the top transition opening 631 of the top transition partition 63; the cold air flow cavity 12 of the transition heat exchange cavity 15 is isolated from the second transition cavity 182 through the top transition sealing part 632 of the top transition partition 63; the hot air flow cavity 11 of the second heat exchanger unit 1b is connected to the second transition cavity 182 through the confluence opening 611 of the top partition 61; the cold air flow cavity 12 of the second heat exchanger unit 1b is isolated from the second transition cavity 182 through the confluence sealing part 612 of the top partition 61; the hot air flow cavity 11 of the transition heat exchange cavity 15 and the hot air flow cavity 11 of the second heat exchanger unit 1b are connected through the second transition cavity 182.

[0115] In this embodiment, the hot airflow chamber 11 of the first heat exchanger unit 1a and the transition heat exchange chamber 15 is connected through the first transition chamber 181, and the hot airflow chamber 11 of the transition heat exchange chamber 15 and the second heat exchanger unit 1b is connected through the second transition chamber 182. After the hot airflow enters the hot airflow chamber 11 of the first heat exchanger unit 1a from the hot end air inlet 141 at the top, the hot airflow flows vertically in a straight line within the single airflow chamber, and simultaneously flows horizontally through the first transition chamber 181 and the second transition chamber 182 to adjacent airflow chambers, exhibiting an S-shaped flow. The cold airflow chambers 12 of the first heat exchanger unit 1a, the transition heat exchange chamber 15, and the second heat exchanger unit 1b are interconnected, allowing the cold airflow to flow vertically in a straight line within a single airflow chamber, and simultaneously flow horizontally to adjacent airflow chambers, exhibiting an S-shaped flow. This achieves 3D flow heat exchange of hot and cold airflow within the heat exchanger unit shell 10.

[0116] For details, see Figures 8a to 8c The hot airflow enters the first heat exchanger unit 1a through the hot-end air inlet 141 at the top of the first heat exchanger unit 1a, flowing downwards in a straight line along the height direction of the first heat exchanger unit 1a. When the hot airflow reaches the bottom of the first heat exchanger unit 1a, it enters the first transition cavity 181 through the bottom end partition 62 at the bottom of the first heat exchanger unit 1a, and flows horizontally. It then enters the transition heat exchange cavity 15 through the bottom end transition partition 64 at the bottom of the transition heat exchange cavity 15. Inside the transition heat exchange cavity 15, the hot airflow flows upwards in a straight line along the height direction of the transition heat exchange cavity 15. When the hot airflow reaches the top of the transition heat exchange cavity 15, it enters the second transition cavity 182 through the top end transition partition 63 at the top of the transition heat exchange cavity 15, and flows horizontally. It then enters the second heat exchanger unit 1b through the top end partition 61 at the top of the second heat exchanger unit 1b. Inside the second heat exchanger unit 1b, the hot airflow flows downwards in a straight line along the height direction of the second heat exchanger unit 1b. When the hot airflow reaches the bottom of the second heat exchanger unit 1b, it enters the second hot end distribution cavity 72 through the bottom partition 62 at the bottom of the second heat exchanger unit 1b, and flows back to the circuit board receiving cavity 102 through the second air outlet 721 to dissipate heat from the heat-generating component 200. Within the heat exchanger unit housing 10, the hot airflow flows horizontally through the first transition cavity 181 and the second transition cavity 182, traversing the first heat exchanger unit 1a, the transition heat exchange cavity 15, and the second heat exchanger unit 1b, thus forming a series hot airflow duct.

[0117] See Figure 6b and Figure 8c A first transition baffle 151 is provided between the first heat exchanger unit 1a and the transition heat exchange chamber 15; a first side plate air passage hole 1511 is provided at the end of the first transition baffle 151 away from the cold end air inlet 131, for connecting the first heat exchanger unit 1a and the cold air flow chamber 12 of the transition air flow chamber 16; a second transition baffle 152 is provided between the transition heat exchange chamber 15 and the second heat exchanger unit 1b; a second side plate air passage hole 1521 is provided at the end of the second transition baffle 152 away from the cold end air outlet 132, for connecting the transition heat exchange chamber 15 and the cold air flow chamber 12 of the second heat exchanger unit 1b.

[0118] In this embodiment, the cold airflow enters the first heat exchanger unit 1a from the cold end air inlet 131 and flows downwards in a straight line along the height direction of the first heat exchanger unit 1a. When the cold airflow reaches the bottom of the first heat exchanger unit 1a, it flows horizontally from the first heat exchanger unit 1a to the transition heat exchange chamber 15 through the first side plate air passage 1511 of the first transition baffle 151. Inside the transition heat exchange chamber 15, the cold airflow flows upwards in a straight line along the height direction of the transition heat exchange chamber 15. When the cold airflow reaches the top of the transition heat exchange chamber 15, it flows horizontally from the transition heat exchange chamber 15 to the second heat exchanger unit 1b through the second side plate air passage 1521 of the second transition baffle 152. Inside the second heat exchanger unit 1b, the cold airflow flows downwards in a straight line along the height direction. When the cold airflow reaches the bottom of the second heat exchanger unit 1b, it is discharged to the external environment through the cold end air outlet 132 of the second heat exchanger unit 1b. The cold airflow in the heat exchanger unit shell 10 flows horizontally through the first transition baffle 151 and the second transition baffle 152, and can cross the first heat exchanger unit 1a, the transition heat exchange cavity 15 and the second heat exchanger unit 1b, thereby forming a series cold airflow duct.

[0119] During the flow of the cold and hot air currents, the cold and hot air currents bend and mix in the 3D space, which helps to make the heat exchange between the cold air current and the hot fluid more complete, greatly enhancing the overall heat exchange effect.

[0120] In the third embodiment of this utility model, as Figure 6b As shown, the heat exchange device includes: a transition heat exchange chamber 15; a transition heat exchange fin 9 is provided inside the transition heat exchange chamber 15; the transition heat exchange fin 9 includes: multiple transition finned tubes 90; multiple baffles 5 are sequentially and spaced from top to bottom on the transition finned tubes 90, dividing the cold air flow chamber 12 in the transition heat exchange chamber 15 into multiple sub-cold air flow chambers 121; each baffle 5 has a baffle opening part 51, a baffle sealing part 52, and a baffle air passage part 53; the shape and position of the baffle opening part 51 correspond to the transition finned tubes 90, and are used to avoid the outer side walls of each transition finned tube 90; the three sides of the baffle sealing part 52 are sealed to the inner side wall of the transition heat exchange chamber 15, the first transition baffle 151, and the second transition baffle 152; the baffle air passage part 53 is provided on the side of the baffle sealing part 52 that is not sealed to the transition heat exchange chamber 15, and is used to connect the multiple sub-cold air flow chambers 121.

[0121] In this embodiment, multiple baffles 5 can be sequentially and spaced from top to bottom on the transition finned tube 90 in the transition heat exchange cavity 15 to divide the cold air flow cavity 12 in the transition heat exchange cavity 15 into multiple sub-cold air flow cavities 121. The structure and function of the baffles 5 are the same as in the previous embodiment, and will not be described in detail here.

[0122] In the third embodiment of this utility model, as Figures 9a to 9d As shown, Figure 9a for Figure 6a The diagram shows the internal structure of the heat exchange device (the heat exchange finned tubes are long straight heat exchange tubes). Figure 9b for Figure 7a Top-down perspective view (the heat exchange finned tubes are long straight heat exchange tubes). Figure 9c for Figure 9a Sectional view along the LL direction. Figure 9d for Figure 9c A cross-sectional view along the MM direction. The individual heat exchange fins 2 are formed by multiple heat exchange finned tubes 20 with circular cross-sections arranged at intervals; the heat exchange finned tubes 20 include: a long straight heat exchange tube 2031; or, a spiral heat exchange tube 2032; or, a long straight heat exchange tube 2031 and a spiral heat exchange tube 2032; a cold end inlet fan 42 or a cold end outlet fan 44 is installed between the heat exchange finned tubes 20 and the heat exchanger unit housing 10, which is attached to one side of the front shell 101 of the chassis.

[0123] In this embodiment, the heat exchange finned tube 20 can be a long, straight cylindrical heat exchange tube 2031. Multiple long, straight heat exchange tubes 2031 are arranged in a staggered pattern. This staggered arrangement enhances the turbulence of the cold airflow and increases the heat exchange intensity between the cold airflow and the long, straight heat exchange tubes 2031. Alternatively, they can be arranged in a straight line. In this case, the hot airflow will flow within each long, straight heat exchange tube 2031, while the cold airflow exhibits both vertical flow along the height direction and infiltration flow within the intersecting gaps outside the long, straight heat exchange tubes 2031. The main body of the spiral heat exchange tube 2032 is spirally wound, gradually transitioning into a short, straight cylindrical shape at both ends. Both ends of the spiral heat exchange tube 2032 can communicate with the open portions of each partition.

[0124] Compared to the U-shaped heat exchange finned tubes 20, the long, straight cylindrical heat exchange tubes 2031 do not have a stepped structure. Each long, straight heat exchange tube 2031 is vertically and evenly filled in the heat exchange cavity of the heat exchanger unit shell 10 along the height direction.

[0125] When the heat exchange finned tube 20 is a long, straight cylindrical heat exchange tube 2031, such as Figures 9b to 9c As shown, the open portions of the transition baffle 23, the top baffle 61, the bottom baffle 62, and the baffle 5 are all straight cylindrical circles corresponding to the openings of the long straight heat exchange tube 2031. Their functions are the same as in the aforementioned embodiments, and will not be described in detail here.

[0126] The heat exchange finned tube 20 is a composite form, that is, it simultaneously has a long straight heat exchange tube 2031 and a spiral heat exchange tube 2032. The spiral heat exchange tube 2032 increases the flow path and flow time of the hot airflow in the hot airflow cavity 11, which helps to make the heat exchange process more complete. At the same time, when the hot and cold airflows flow around the spiral heat exchange tube 2032, they can enhance local disturbances, which helps to strengthen heat exchange.

[0127] The number of turns of the spiral heat exchanger tube 2032, or the quantity and distribution of spiral heat exchanger tubes 2032 per turn, as well as the distribution relationship between the long straight heat exchanger tubes 2031 and the spiral heat exchanger tubes 2032, can be of other types. The spiral heat exchanger tube 2032 is an elastic metal tube. Under the disturbance of the airflow, the elastic tube can undergo micro-vibration, which helps to break the boundary layer during convective heat exchange with the airflow, thereby enhancing heat transfer.

[0128] The structure of the long straight heat exchange tube 2031 and the spiral heat exchange tube 2032 in this embodiment is also applicable to the heat exchange finned tube 20 in the first embodiment and the second embodiment.

[0129] In the first heat exchanger unit 1a and the second heat exchanger unit 1b, the long straight heat exchange tubes 2031 fill at most the side of the cold end inlet fan 42 and the cold end outlet fan 44 away from the front cover 101 of the chassis. In the transition heat exchange cavity 15, the long straight heat exchange tubes 2031 can almost fill the transition heat exchange cavity 15.

[0130] For details, see Figures 9a to 9d The heat exchanger unit 1 further includes: a first guide plate 24; the first guide plate 24 is disposed between the heat exchange finned tube 20 and the heat exchanger unit shell 10 attached to one side of the front shell 101 of the chassis; the first guide plate 24 includes: a first guide section 241 and a second guide section 242; the first guide section 241 is located below the cold end air intake fan 42; the second guide section 242 is located above the bottom partition 62. The heat exchange device includes: a transition heat exchange chamber 15; a first guide plate 24 disposed within a first heat exchanger unit 1a; the heat exchanger unit 1 further includes: a second guide plate 25; the second guide plate 25 is disposed within a second heat exchanger unit 1b, located between the heat exchange finned tube 20 and the heat exchanger unit outer shell 10 attached to one side of the front shell 101 of the chassis; the second guide plate 25 includes: a third guide section 251 and a fourth guide section 252; the third guide section 251 is located above the cold end outlet fan 44; the fourth guide section 252 is located below the top partition 61 of the second heat exchanger unit 1b.

[0131] In the first heat exchanger unit 1a, a certain space is formed in the area below the cold-end inlet fan 42 for installing the first guide plate 24. In the second heat exchanger unit 1b, a certain space is formed in the area above the cold-end outlet fan 44 for installing the second guide plate 25. With the action of the first guide plate 24 and the second guide plate 25, the cold airflow can always be ensured to flow in close contact with the outer wall surface of the long straight heat exchange tube 2031, which helps to improve the heat exchange intensity.

[0132] In some embodiments of this utility model, such as Figures 10a to 10d As shown, Figure 10a This is a schematic diagram of the structure at the top of the first sub-gas flow chamber. Figure 10b This is a cross-sectional view of a long, straight heat exchange tube. Figure 10c This is a schematic diagram of the first heat exchange structure distribution. Figure 10d This is a schematic diagram of the second heat exchange structure distribution. A first heat exchange structure 81 is disposed inside the long straight heat exchange tube 2031; the first heat exchange structure 81 is axially distributed along the hot air flow cavity 11 inside the long straight heat exchange tube 2031; a second heat exchange structure 82 is disposed outside the heat exchange finned tube 20; the second heat exchange structure 82 fills the cold air flow cavity 12. The first heat exchange structure 81 has a plate-like spiral shape; the second heat exchange structure 82 has a porous foam metal structure.

[0133] In this embodiment, see Figure 10b The first heat exchange structure 81 is a flow-turbulence component, in the shape of a plate-like spiral, distributed along the axial direction of the circular pipe of the long straight heat exchange tube 2031. Under the action of the first heat exchange structure 81, the local flow direction of the hot airflow within the long straight heat exchange tube 2031 can be altered, enhancing the turbulence of the hot airflow within the tube, which helps to break the boundary layer, thereby strengthening the heat transfer intensity between the hot airflow and the inner wall of the long straight heat exchange tube 2031. Preferably, some openings can be added to the first heat exchange structure 81 to minimize the flow resistance within the tube while enhancing the turbulence.

[0134] The first heat exchange structure 81 can be completely distributed inside the entire long straight heat exchange tube 2031, that is, the height of the first heat exchange structure 81 is approximately equal to the height of the long straight heat exchange tube 2031, such as... Figure 10c As shown in the left figure; it can also be distributed locally inside the long straight heat exchange tube 2031, that is, the height of the first heat exchange structure 81 is less than the height of the long straight heat exchange tube 2031, and multiple structures are distributed at intervals, such as... Figure 10c As shown in the right figure. In this arrangement, the first heat exchange structure 81 is preferentially distributed at the inlet position of the long straight heat exchange tube 2031 to ensure that the hot airflow generates a disturbance effect as soon as it enters the long straight heat exchange tube 2031.

[0135] Meanwhile, a second heat exchange structure 82 can be installed outside the long straight heat exchange tubes 2031, i.e., within the gap channel formed by the staggered arrangement of the long straight heat exchange tubes 2031 in the cold airflow cavity 12. The second heat exchange structure 82 is a heat-conducting frame component, such as... Figure 10d As shown, the second heat exchange structure 82 is a porous foam metal structure. The metal skeleton in the second heat exchange structure 82 can conduct heat, and the porous structure in the second heat exchange structure 82 can allow airflow to pass through. After the second heat exchange structure 82 is filled into the gaps outside each long straight heat exchange tube 2031, the mesh-like heat-conducting skeleton can connect the outer walls of each long straight heat exchange tube 2031 to form a heat-conducting mesh.

[0136] Specifically, heat is transferred from the inner wall of the long straight heat exchange tube 2031 to its outer wall. On one hand, the heat can be directly carried away by the convection between the cold airflow and the outer wall of the long straight heat exchange tube 2031. On the other hand, the heat can be further dispersed along the mesh-like heat-conducting framework, and then the cold airflow can carry away this heat as it passes through the pores of the heat-conducting framework. The second heat exchange structure 82 bridges the long straight heat exchange tubes 2031, and the heat-conducting mesh increases the heat exchange area with the cold airflow, thus helping to improve the heat exchange intensity.

[0137] The first heat exchange structure 81 is distributed inside the long straight heat exchange tube 2031 and is located in the hot air flow chamber 11; the second heat exchange structure 82 is distributed outside the long straight heat exchange tube 2031 and is located in the cold air flow chamber 12; the inner and outer structures are combined with each other, and the hot air flow chamber 11 side and the cold air flow chamber 12 side work together to enhance the overall heat exchange capacity of the heat exchanger unit.

[0138] In actual production, foam metal with appropriate mesh size or porosity can be selected based on the system's flow resistance to minimize flow resistance while increasing the heat exchange area. Long, straight heat exchange tubes 2031 can be filled in localized areas of the cold airflow cavity, or they can be filled throughout the entire cold airflow cavity. Furthermore, the first heat exchange structure 81 and each heat exchange finned tube 20, as well as the second heat exchange structure 82 and each heat exchange finned tube 20, can be integrally formed (e.g., sintered, 3D printed) or separately formed. The spiral heat exchange tube 2032 may not have the first heat exchange structure 81 (or turbulence structure); the rotation of the spiral flow channel alone can achieve a self-disturbance effect. The second heat exchange structure 82 (porous foam metal) may also be omitted from the cold airflow cavity 12, as the spiral heat exchange tube 2032 itself has a large heat dissipation area.

[0139] In some embodiments of this utility model, such as Figures 11a to 11d As shown, Figure 11a for Figure 6a The diagram shows the internal structure of the heat exchange device (the heat exchange finned tubes are long straight heat exchange tubes and spiral heat exchange tubes). Figure 11b for Figure 7a A top-down perspective view (the heat exchange finned tubes are long straight heat exchange tubes and spiral heat exchange tubes, with the long straight heat exchange tubes located at the four corners and the center of rotation of the spiral heat exchange tubes). Figure 11c for Figure 11a Cross-sectional view along the NN direction (the long straight heat exchange tubes are located at the four corners and the center of rotation of the spiral heat exchange tubes). Figure 11d This is a schematic diagram of a heat exchange finned tube structure with long straight heat exchange tubes located at the four corners and the center of rotation of a spiral heat exchange tube. The heat exchange finned tube 20 includes: a spiral heat exchange tube 2032; or, a long straight heat exchange tube 2031 and a spiral heat exchange tube 2032; the spiral heat exchange tube 2032 includes multiple spiral heat exchange sub-tubes 2033 with different pitches; the multiple spiral heat exchange sub-tubes 2033 are nested around the same center of rotation; among the multiple spiral heat exchange sub-tubes 2033 with different pitches, the diameter of the spiral heat exchange sub-tubes 2033 located in the outer ring is larger than the diameter of the spiral heat exchange sub-tubes 2033 located in the inner ring.

[0140] In this embodiment, the spiral heat exchange tube 2032 is a spiral finned tube bundle formed by nesting together multiple spiral heat exchange sub-tubes 2033 with different spiral diameters (rotation diameters). Within the spiral heat exchange tube 2032, the spiral heat exchange sub-tubes 2033 can be distributed in a "coil" or "ring" pattern with different diameters (or spiral diameters). Figure 11c As shown, Figure 11c The portion enclosed by a circular or elliptical line is the long straight heat exchange tube 2031. The spiral heat exchange tube 2032 can contain three spiral heat exchange sub-tubes 2033 of different diameters, which gradually increase in size from the inside to the outside, i.e., the larger diameter spiral tubes surround the smaller diameter spiral tubes, nested together; there can be four spiral heat exchange sub-tubes 2033 of each diameter, which are distributed at equal angles to form a "circle" or "ring"; ultimately forming a "three-circle" spiral heat exchange tube 2032.

[0141] Furthermore, the diameter of the spiral heat exchange tube 2032 is larger than that of the long straight heat exchange tube 2031. Specifically, in the spiral heat exchange tube 2032, the diameter of the outer ring is larger than that of the inner ring. This creates a distribution pattern of increasing and decreasing tube diameter from the perimeter of the first heat exchanger unit 1a, the second heat exchanger unit 1b, and the transition heat exchange chamber 15 to the central region. In this configuration, the tube diameters of the heat exchange finned tubes 20 are distributed in a stepped manner according to type and location, which can, to some extent, balance the flow resistance of the tube bundle and enhance the uniformity of airflow within each heat exchange finned tube, thereby improving the overall heat exchange efficiency.

[0142] Specifically, such as Figure 11b , Figure 11c and Figures 12a to 12c As shown, Figure 12a for Figure 7aA top-down perspective view (the heat exchange finned tubes are long straight heat exchange tubes and spiral heat exchange tubes, with the long straight heat exchange tubes located at the periphery and center of rotation of the spiral heat exchange tubes). Figure 12b for Figure 11a Cross-sectional view along the NN direction (the long straight heat exchange tube is located at the periphery of the spiral heat exchange tube and the center of rotation). Figure 12c This is a schematic diagram of a heat exchange finned tube structure where the long straight heat exchange tubes are located at the four edges and the center of rotation of the spiral heat exchange tube. The heat exchange finned tube 20 includes: a long straight heat exchange tube 2031 and a spiral heat exchange tube 2032; the diameter of the spiral heat exchange tube 2032 is larger than the diameter of the long straight heat exchange tube 2031; the long straight heat exchange tube 2031 is located at the four corners inside the heat exchanger unit shell 10 and at the center of rotation of the spiral heat exchange tube 2032; or, the long straight heat exchange tube 2031 is located at the four edges inside the heat exchanger unit shell 10 and at the center of rotation of the spiral heat exchange tube 2032.

[0143] In this embodiment, the heat exchange finned tube 20 can be a composite form dominated by spiral heat exchange tubes 2032. In this case, the spiral heat exchange tubes 2032 are distributed in the middle majority of the heat exchanger unit shell 10, while the long straight heat exchange tubes 2031 are distributed in the corners of each group of heat exchanger unit shells 10, as well as in the very center. Figure 11c As shown, since the heat exchange finned tubes 20 of each "ring" or "loop" are distributed at equal angles of 90°, the connection points of the straight sections at both ends of the spiral heat exchange tube 2032 with the top baffle 61 are distributed on the top baffle 61 in a "cross" shape.

[0144] Alternatively, the number of long straight heat exchange tubes 2031 and spiral heat exchange tubes 2032 is roughly equal, forming a "balanced" composite heat exchange finned tube 20: the spiral heat exchange tubes 2032 are distributed in the middle part of the heat exchanger unit shell 10, and can be in two rings, inner and outer; the long straight heat exchange tubes 2031 are distributed in the surrounding part of the heat exchanger unit shell 10, as well as the very center area, and the long straight heat exchange tubes 2031 distributed in the surrounding area are arranged in a staggered pattern. In the above tube bundle, each tube does not contact the others, that is, there is a certain gap for the flow of cold air.

[0145] Taking the third embodiment of this utility model as an example, part of the hot airflow flows linearly through the long straight heat exchange tube 2031, and part flows in a rotating manner through the spiral heat exchange tube 2032. Then, under the action of the first transition cavity 181 and the second transition cavity 182, a cross-group bending flow is achieved. After the cold airflow enters the cold airflow cavity 12, it will permeate along the gaps formed by the heat exchange finned tubes 20, and under the action of the first side plate air passage hole 1511 and the second side plate air passage hole 1521, a cross-group bending flow is achieved. In the above way, the interaction between the hot airflow inside the tube and the cold airflow outside the tube is stronger, which helps to further enhance heat exchange.

[0146] This utility model also provides a heat dissipation chassis 100, such as Figure 2a , Figure 2b , Figure 5a , Figure 5b , Figure 7a and Figure 7b As shown. A heat exchange device including any of the above embodiments; the heat exchange device is located inside the circuit board receiving cavity 102 of the heat dissipation chassis 100 and is installed on the front shell 101 of the chassis 100, for dissipating heat from the heat-generating module 200 inside the heat dissipation chassis 100.

[0147] In this embodiment, the space enclosed by the heat exchanger unit shell 10 and the inner wall of the heat dissipation casing 100 is the circuit board receiving cavity 102. The circuit board receiving cavity 102 contains a heat-generating module 200, which can be a module that generates a lot of heat during operation, such as IGBTs, braking resistors, etc.; it can also be a module that generates little heat during operation but is relatively sensitive to temperature, such as batteries, capacitors, etc. Of course, there are other power electronic devices in the circuit board receiving cavity 102, which are not listed in detail here.

[0148] The circuit board housing 102 is a sealed cavity, thereby ensuring the high IP rating of the built-in power electronic devices and preventing short circuits caused by pollutants such as dust and water vapor in the external environment.

[0149] The hot airflow chamber 11 of the heat exchanger unit is connected to the circuit board receiving chamber 102. Under the action of the hot-end air intake fan 41, the hot air in the circuit board receiving chamber 102 enters the hot airflow chamber 11 of the heat exchanger unit, and the heat is transferred to the cold airflow chamber 12 by the heat exchange fins 2 of the unit. As the heat exchange process proceeds, the cooled hot airflow flows out from the bottom of the heat exchanger unit and re-enters the circuit board receiving chamber 102, cooling the heating module 200.

[0150] In some embodiments of this utility model, such as Figure 2a , Figure 2b , Figure 7a , Figure 7bAs shown, the front shell 101 of the chassis is provided with a front shell air inlet 1011 and a front shell air outlet 1012; the front shell air inlet 1011 is provided in correspondence with the cold end air inlet 131 of the heat exchanger unit shell 10; the front shell air outlet 1012 is provided in correspondence with the cold end air outlet 132 of the heat exchanger unit shell 10.

[0151] In this embodiment, the cold airflow chamber 12 of the heat exchanger unit 1 is connected to the external environment outside the heat dissipation box 100. The front shell 101 of the box is provided with a front shell air inlet 1011 and a front shell air outlet 1012 at positions corresponding to the cold end air inlet 131 and the cold end air outlet 132, respectively. Under the action of the cold end air intake fan 42, the cold airflow in the external environment can enter the cold airflow chamber 12 of the heat exchanger unit through the front shell air inlet 1011, absorb the heat of the heat exchange fins, and then flow out of the heat exchanger unit and the heat dissipation box 100 through the front shell air outlet 1012 to carry the heat to the external environment.

[0152] In some embodiments of this utility model, such as Figure 5a and Figure 5b As shown, the heat exchange device has multiple heat exchanger units 1; the heat exchanger unit shells 10 of the multiple heat exchanger units 1 are arranged side by side at intervals; the front shell 101 of the chassis is provided with multiple front shell air inlets 1011 and multiple front shell air outlets 1012; each front shell air inlet 1011 is corresponding to the cold end air inlet 131 of a heat exchanger unit shell 10; each front shell air outlet 1012 is corresponding to the cold end air outlet 132 of a heat exchanger unit shell 10.

[0153] In this embodiment, a plurality of front shell air inlets 1011 and a plurality of front shell air outlets 1012 are provided, which correspond to the cold end air inlet 131 and cold end air outlet 132 of each heat exchanger unit shell 10, respectively.

[0154] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A heat exchange device, characterized in that, Installed inside a heat dissipation enclosure (100); the heat exchange device has at least one cold end air inlet (131) and at least one cold end air outlet (132) on the side that is in contact with the front shell (101) of the heat dissipation enclosure (100); the cold end air outlet (132) is spaced apart from the cold end air inlet (131); the heat exchange device has a hot end air inlet (141) and a hot end air outlet (142) at its top and bottom ends respectively; including: at least one heat exchanger unit (1); each heat exchanger unit (1) includes: a heat exchanger unit shell (10) and unit heat exchange fins (2). The heat exchange fins (2) include: a plurality of heat exchange finned tubes (20); the plurality of heat exchange finned tubes (20) are erected at intervals inside the heat exchanger unit shell (10) along the height direction of the heat exchanger unit shell (10); Both ends of the plurality of heat exchange finned tubes (20) are connected to the hot end air inlet (141) and the hot end air outlet (142) respectively. The interior of the plurality of heat exchange finned tubes (20) is a hot air flow chamber (11). The area between the outer wall of the plurality of heat exchange finned tubes (20) and the outer shell (10) of the heat exchanger unit forms a cold air flow chamber (12). The hot air flow chamber (11) and the cold air flow chamber (12) are isolated from each other. The hot airflow chamber (11) is connected to the circuit board receiving cavity (102) of the heat dissipation box (100) through the hot end air inlet (141) and the hot end air outlet (142); the cold airflow chamber (12) is connected to the external environment through the cold end air inlet (131) and the cold end air outlet (132) so that the cold airflow in the external environment enters the heat exchanger unit shell (10) and exchanges heat with the hot airflow in the hot airflow chamber (11).

2. The heat exchange device according to claim 1, characterized in that, Each heat exchanger unit (1) has a heat exchanger unit shell (10) with a top partition (61) at its top. The top partition (61) has a flow-inlet opening (611) and a flow-inlet sealing part (612). The flow-inlet opening (611) of the top partition (61) corresponds to the position of the hot end air inlet (141). Except for the flow-inlet opening (611), the other positions on the top partition (61) are flow-inlet sealing parts (612). The hot end air inlet (141) is connected to the circuit board receiving cavity (102) through the top partition (61) and is isolated from the cold air flow cavity (12). The bottom end of the heat exchanger unit housing (10) is provided with a bottom partition (62); the bottom partition (62) has an air outlet opening (621) and an air outlet sealing part (622); the air outlet opening (621) of the bottom partition (62) corresponds to the position of the hot end air outlet (142), and the remaining positions of the bottom partition (62) except for the air outlet opening (621) are air outlet sealing parts (622); the hot end air outlet (142) is connected to the circuit board receiving cavity (102) through the bottom partition (62) and is isolated from the cold air flow cavity (12).

3. The heat exchange device according to claim 2, characterized in that, The number of heat exchanger units (1) is one; The heat exchanger unit shell (10) of the heat exchanger unit (1) is provided with the cold end air inlet (131) and the cold end air outlet (132) on the side that is in contact with the front shell (101) of the heat dissipation box (100). The top or bottom end of the heat exchanger unit shell (10) of the heat exchanger unit (1) is provided with the hot end air inlet (141); the end of the heat exchanger unit shell (10) of the heat exchanger unit (1) away from the hot end air inlet (141) is provided with the hot end air outlet (142).

4. The heat exchange device according to claim 3, characterized in that, The top and bottom ends of the individual heat exchange fins (2) are flush with the top and bottom ends of the heat exchanger unit shell (10), respectively; the top opening of the plurality of heat exchange fin tubes (20) is formed as a hot end air inlet (141), and the bottom opening is formed as a hot end air outlet (142). The heat exchanger unit (1) further includes: a first hot end manifold (31) disposed above the top of the heat exchanger unit housing (10); among the multiple side walls of the first hot end manifold (31), at least one side wall other than the side facing the front shell (101) of the chassis is provided with a first manifold air inlet (311); the bottom of the first hot end manifold (31) is connected to the hot end air inlet (141) and isolated from the cold air flow chamber (12); The bottom openings of the plurality of heat exchange finned tubes (20) are isolated from the cold air flow chamber (12); A hot-end air intake fan (41) is installed in the first hot-end manifold (31) to draw hot air into the first hot-end manifold (31); a cold-end air intake fan (42) is installed in the cold-end air inlet (131) to draw cold air into the cold airflow chamber (12).

5. The heat exchange device according to claim 2, characterized in that, The number of heat exchanger units (1) is multiple; the heat exchanger unit shells (10) of the multiple heat exchanger units (1) are arranged side by side at intervals; Each heat exchanger unit (1) has a cold end air inlet (131) and a cold end air outlet (132) on the side of its heat exchanger unit shell (10) that is in contact with the front shell (101) of the heat dissipation box (100). Each heat exchanger unit (1) has a hot end air inlet (141) at the top or bottom of its heat exchanger unit shell (10); and each heat exchanger unit (1) has a hot end air outlet (142) at the end of its heat exchanger unit shell (10) away from the hot end air inlet (141).

6. The heat exchange device according to claim 5, characterized in that, The top and bottom ends of the heat exchange fins (2) of each heat exchanger unit (1) are flush with the top and bottom ends of the heat exchanger unit shell (10) of the heat exchanger unit (1); the top opening of the plurality of heat exchange fin tubes (20) is formed as a hot end air inlet (141), and the bottom opening is formed as a hot end air outlet (142). The top of each of the plurality of heat exchanger units (1) is connected to a second hot end manifold (32); the second hot end manifold (32) is provided with a second manifold air inlet (321) on one side facing the circuit board receiving cavity (102) of the heat dissipation box (100); the bottom of the second hot end manifold (32) is connected to the hot end air inlet (141) of each of the heat exchanger unit shells (10) and is isolated from the cold air flow cavity (12) of each of the heat exchanger unit shells (10); the bottom openings of the plurality of heat exchange finned tubes (20) of each of the heat exchanger unit shells (10) are isolated from the cold air flow cavity (12) of the heat exchanger unit shells (10); Inside the second hot end manifold (32), each heat exchanger unit (1) is equipped with a hot end air intake fan (41) at its top end to draw hot air into the second hot end manifold (32); each heat exchanger unit (1) is equipped with a cold end air intake fan (42) at its cold end air inlet (131) to draw cold air into the cold air flow chamber (12). The bottom end of each of the plurality of heat exchanger units (1) is connected to a first hot end distribution cavity (71); the interior of the first hot end distribution cavity (71) is connected to the hot end air outlet (142) of each of the heat exchanger units (1) and isolated from the cold air flow cavity (12) of all the heat exchanger units (1); the first hot end distribution cavity (71) is provided with a first air outlet (711) on the side facing the circuit board receiving cavity (102) of the heat dissipation box (100) to guide the hot air flow after heat exchange back to the circuit board receiving cavity (102).

7. The heat exchange device according to claim 2, characterized in that, The heat exchange device further includes: a transition heat exchange cavity (15). The number of heat exchanger units (1) is two; they are respectively disposed on both sides of the transition heat exchange chamber (15); and the two heat exchanger units (1) are inverted relative to each other in the height direction; wherein, the cold end air inlet (131) is disposed on the side where the heat exchanger unit shell (10) of one of the heat exchanger units (1) is in contact with the front shell (101) of the heat dissipation box (100); the cold end air outlet (132) is disposed on the side where the shell (10) of the other heat exchanger unit is in contact with the front shell (101) of the heat dissipation box (100); Each heat exchanger unit housing (10) and the transition heat exchange cavity (15) is provided with a hot end air inlet (141) at its top or bottom; and each heat exchanger unit housing (10) and the transition heat exchange cavity (15) is provided with a hot end air outlet (142) at the end away from the hot end air inlet (141). The transition heat exchange cavity (15) is provided with transition heat exchange fins (9); the transition heat exchange fins (9) include: a plurality of transition fin tubes (90); the plurality of transition fin tubes (90) are spaced apart and erected inside the transition heat exchange cavity (15) along the height direction of the transition heat exchange cavity (15); Both ends of the plurality of transition finned tubes (90) are connected to the hot end air inlet (141) and hot end air outlet (142) of the transition heat exchange cavity (15), respectively. The interior of the plurality of transition finned tubes (90) is a hot air flow cavity (11). The area between the outer wall of the plurality of transition finned tubes (90) and the transition heat exchange cavity (15) forms a cold air flow cavity (12). The hot air flow cavity (11) and the cold air flow cavity (12) are isolated from each other. The hot air flow chambers (11) of the two heat exchanger units (1) are respectively connected to the hot air flow chambers (11) of the transition heat exchange chamber (15); the cold air flow chambers (12) of the two heat exchanger units (1) are respectively connected to the cold air flow chambers (12) of the transition heat exchange chamber (15).

8. The heat exchange device according to claim 7, characterized in that, A top transition partition (63) is provided at the top of the transition heat exchange cavity (15); a top transition open portion (631) and a top transition sealed portion (632) are provided on the top transition partition (63); the top transition open portion (631) of the top transition partition (63) corresponds to the hot end air outlet (142) of the transition heat exchange cavity (15), and the remaining positions on the top partition (61) except for the top transition open portion (631) are top transition sealed portions (632); the hot end air outlet (142) is connected to the circuit board receiving cavity (102) through the top partition (61) and is isolated from the cold air flow cavity (12); At the bottom end of the transition heat exchange cavity (15), a bottom transition partition (64) is provided; the bottom transition partition (64) has a bottom transition open portion (641) and a bottom transition sealed portion (642); the bottom transition open portion (641) of the bottom transition partition (64) corresponds to the hot end air inlet (141) of the transition heat exchange cavity (15), and the remaining positions on the bottom transition partition (64) except for the bottom transition open portion (641) are bottom transition sealed portions (642); the hot end air inlet (141) is connected to the circuit board receiving cavity (102) through the bottom transition partition (64) and is isolated from the cold air flow cavity (12).

9. The heat exchange device according to claim 8, characterized in that, The top and bottom ends of the heat exchange fins (2) of each heat exchanger unit (1) are flush with the top and bottom ends of the heat exchanger unit shell (10) of the heat exchanger unit (1); the top opening of the plurality of heat exchange fin tubes (20) is formed as a hot end air inlet (141), and the bottom opening is formed as a hot end air outlet (142). The top and bottom ends of the transition heat exchange fins (9) of the transition heat exchange cavity (15) are flush with the top and bottom ends of the transition heat exchange cavity (15), respectively; the bottom opening of the plurality of transition finned tubes (90) is formed as a hot end air inlet (141), and the top opening is formed as a hot end air outlet (142). The top of one of the heat exchanger units (1) is connected to a third hot end manifold (33) to form a first heat exchanger unit (1a); the third hot end manifold (33) has a third manifold air inlet (331) on one side facing the circuit board receiving cavity (102) of the heat dissipation box (100); the bottom of the third hot end manifold (33) is connected to the hot end air inlet (141) of the heat exchanger unit (1) and isolated from the cold air flow cavity (12) of the heat exchanger unit (1); the bottom openings of the multiple heat exchange finned tubes (20) of each heat exchanger unit shell (10) are isolated from the cold air flow cavity (12) of the heat exchanger unit shell (10); A hot-end air intake fan (41) is installed in the third hot-end manifold (33) to draw hot air into the third hot-end manifold (33); a cold-end air intake fan (42) is installed in the cold-end air inlet (131) to draw cold air into the cold airflow chamber (12); Another heat exchanger unit (1) has a second hot end diversion cavity (72) at its bottom end, forming a second heat exchanger unit (1b); the interior of the second hot end diversion cavity (72) is connected to the hot end air outlet (142) of the heat exchanger unit (1) and isolated from the cold air flow cavity (12) of the heat exchanger unit (1); the second hot end diversion cavity (72) has a second air outlet (721) on the side facing the circuit board receiving cavity (102) of the heat dissipation box (100) to guide the heat exchanged hot air flow back to the circuit board receiving cavity (102). The second hot end distribution cavity (72) is equipped with a hot end air outlet fan (43) for discharging hot air into the circuit board receiving cavity (102); the cold end air outlet (132) is equipped with a cold end air outlet fan (44) for discharging cold air into the external environment.

10. The heat exchange device according to claim 9, characterized in that, A first transition cavity (181) is provided at the bottom of the first heat exchanger unit (1a) and the bottom of the transition heat exchange cavity (15); the hot air flow cavity (11) of the first heat exchanger unit (1a) is connected to the first transition cavity (181) through the air outlet opening (621) of the bottom end partition (62); the cold air flow cavity (12) of the first heat exchanger unit (1a) is isolated from the first transition cavity (181) through the air outlet sealing part (622) of the bottom end partition (62); the hot air flow cavity (11) of the transition heat exchange cavity (15) is connected to the first transition cavity (181) through the bottom transition opening part (641) of the bottom end transition partition (64); the cold air flow cavity (12) of the transition heat exchange cavity (15) is isolated from the first transition cavity (181) through the bottom transition sealing part (642) of the bottom end transition partition (64); The hot air flow chamber (11) of the first heat exchanger unit (1a) and the hot air flow chamber (11) of the transition heat exchange chamber (15) are connected through the first transition chamber (181); A second transition cavity (182) is provided at the top of the transition heat exchange cavity (15) and at the top of the second heat exchanger unit (1b); the hot air flow cavity (11) of the transition heat exchange cavity (15) is connected to the second transition cavity (182) through the top transition opening (631) of the top transition partition (63); the cold air flow cavity (12) of the transition heat exchange cavity (15) is isolated from the second transition cavity (182) through the top transition sealing part (632) of the top transition partition (63); the hot air flow cavity (11) of the second heat exchanger unit (1b) is connected to the second transition cavity (182) through the confluence opening (611) of the top partition (61); the cold air flow cavity (12) of the second heat exchanger unit (1b) is isolated from the second transition cavity (182) through the confluence sealing part (612) of the top partition (61); The hot air flow chamber (11) of the transition heat exchange chamber (15) and the hot air flow chamber (11) of the second heat exchanger unit (1b) are connected through the second transition chamber (182).

11. The heat exchange device according to claim 10, characterized in that, A first transition baffle (151) is provided between the first heat exchanger unit (1a) and the transition heat exchange chamber (15); a first side plate air passage hole (1511) is provided at one end of the first transition baffle (151) away from the cold end air inlet (131) for connecting the first heat exchanger unit (1a) and the cold air flow chamber (12) of the transition air flow chamber (16); a second transition baffle (152) is provided between the transition heat exchange chamber (15) and the second heat exchanger unit (1b); a second side plate air passage hole (1521) is provided at one end of the second transition baffle (152) away from the cold end air outlet (132) for connecting the transition heat exchange chamber (15) and the cold air flow chamber (12) of the second heat exchanger unit (1b).

12. The heat exchange device according to claim 4, 6, or 11, characterized in that, The plurality of heat exchange finned tubes (20) are a plurality of U-shaped tubes arranged in a line; wherein, the airflow channel inside the U-shaped tube forms the hot airflow cavity (11); the area between the outer wall of the U-shaped tube and the outer shell (10) of the heat exchanger unit forms the cold airflow cavity (12). The individual heat exchange fins (2) include: narrow fins (21) and wide fins (22). The narrow fin (21) includes a narrow fin tube (201); the wide fin (22) includes a wide fin tube (202); the width of the wide fin tube (202) in the direction perpendicular to the front shell of the chassis (101) is greater than the width of the narrow fin tube (201) in the direction perpendicular to the front shell of the chassis (101); The narrow finned tube (201) is fixed to the top partition (61); the wide finned tube (202) is fixed to the bottom partition (62). The narrow finned tube (201) facing the front shell of the chassis (101) forms a stepped structure with the wide finned tube (202) facing the front shell of the chassis (101); the cold end air inlet fan (42) installed at the cold end air inlet (131) or the cold end air outlet fan (44) installed at the cold end air outlet (132) is installed in the accommodating space formed by the stepped structure and the heat exchanger unit shell (10).

13. The heat exchange device according to claim 12, characterized in that, The hot air flow chamber (11) of the narrow finned tube (201) is connected to a portion of the hot air flow chamber (11) of the wide finned tube (202); A transition baffle (23) is provided at the connection between the narrow finned tube (201) and the wide finned tube (202); the transition baffle (23) has a transition opening (231), a transition sealing part (232), and a transition deflection part (233); the shape and position of the transition opening part (231) correspond to the narrow finned tube (201) and are used to avoid the outer side wall of each narrow finned tube (201); the three sides of the transition sealing part (232) are sealed to the inner side wall of the heat exchanger unit shell (10); the transition deflection part (233) is provided on the side of the transition sealing part (232) that is not sealed to the heat exchanger unit shell (10) and is used to connect the cold air flow chamber (12) above and below the transition baffle (23). In the stepped structure, the portion of the wide finned tube (202) that is not connected to the hot airflow chamber (11) of the narrow finned tube (201) is isolated from the cold airflow chamber (12) through the transition sealing part (232).

14. The heat exchange device according to claim 13, characterized in that, On the wide finned tube (202), multiple baffles (5) are sequentially spaced from top to bottom to divide the cold air flow chamber (12) below the transition baffle (23) into multiple sub-cold air flow chambers (121); each baffle (5) has a baffle opening part (51), a baffle sealing part (52) and a baffle air passage part (53). The shape and position of the baffle opening (51) correspond to the wide finned tube (202) and are used to avoid the outer side wall of each wide finned tube (202); the three sides of the baffle sealing part (52) are sealed to the inner side wall of the heat exchanger unit shell (10); the baffle air passage part (53) is provided on the side of the baffle sealing part (52) that is not sealed to the heat exchanger unit shell (10) and is used to connect the multiple sub-cold air flow chambers (121).

15. The heat exchange device according to claim 13, characterized in that, The direction of the deflector section (53) of the baffle plate (5) adjacent to the transition baffle plate (23) is opposite to the direction of the transition deflector section (233) of the transition baffle plate (23); The airflow deflector sections (53) of the adjacent baffles (5) face opposite directions.

16. The heat exchange device according to claim 13, characterized in that, The heat exchange device includes: a transition heat exchange cavity (15); a transition heat exchange fin (9) is provided in the transition heat exchange cavity (15); the transition heat exchange fin (9) includes: a plurality of transition finned tubes (90). On the transition finned tube (90), a plurality of baffles (5) are sequentially spaced from top to bottom to divide the cold air flow chamber (12) in the transition heat exchange chamber (15) into a plurality of sub-cold air flow chambers (121); each of the baffles (5) has a baffle opening part (51), a baffle sealing part (52) and a baffle air passage part (53). The shape and position of the baffle opening (51) correspond to the transition finned tube (90) and are used to avoid the outer side wall of each of the transition finned tubes (90); the three sides of the baffle sealing part (52) are sealed with the inner side wall of the transition heat exchange cavity (15), the first transition baffle (151) and the second transition baffle (152); the baffle air passage part (53) is provided on the side of the baffle sealing part (52) that is not sealed with the transition heat exchange cavity (15) and is used to connect the multiple sub-cold air flow cavities (121).

17. The heat exchange device according to claim 4, 6, or 11, characterized in that, The individual heat exchange fin (2) is formed by multiple heat exchange fin tubes (20) with circular cross-sections arranged at intervals; the heat exchange fin tube (20) includes: a long straight heat exchange tube (2031); or, a spiral heat exchange tube (2032); or, a long straight heat exchange tube (2031) and a spiral heat exchange tube (2032). The cold end air inlet fan (42) installed at the cold end air inlet (131) or the cold end air outlet fan (44) installed at the cold end air outlet (132) is installed between the heat exchange finned tube (20) and the heat exchanger unit shell (10) on one side of the front shell (101) of the chassis.

18. The heat exchange device according to claim 17, characterized in that, The heat exchanger unit (1) further includes: a first guide plate (24); the first guide plate (24) is disposed between the heat exchange finned tube (20) and the heat exchanger unit shell (10) on one side of the front shell (101) of the chassis; The first guide plate (24) includes: a first guide section (241) and a second guide section (242); the first guide section (241) is located below the cold end air intake fan (42); the second guide section (242) is located above the bottom end partition (62).

19. The heat exchange device according to claim 18, characterized in that, The number of heat exchanger units (1) is two, one being the first heat exchanger unit (1a) and the other being the second heat exchanger unit (1b). The heat exchange device includes: a transition heat exchange chamber (15); the first guide plate (24) is disposed inside the first heat exchanger unit (1a); The heat exchanger unit (1) further includes: a second guide plate (25); the second guide plate (25) is disposed inside the second heat exchanger unit (1b) and is located between the heat exchange finned tube (20) and the heat exchanger unit shell (10) attached to one side of the front shell (101) of the chassis; The second guide plate (25) includes a third guide section (251) and a fourth guide section (252); the third guide section (251) is located above the cold end exhaust fan (44); the fourth guide section (252) is located below the top partition (61) of the second heat exchanger unit (1b).

20. The heat exchange device according to claim 17, characterized in that, The long straight heat exchange tube (2031) is provided with a first heat exchange structure (81); the first heat exchange structure (81) is distributed axially along the hot air flow cavity (11) inside the long straight heat exchange tube (2031); The exterior of the heat exchange finned tube (20) is provided with a second heat exchange structure (82); the second heat exchange structure (82) is filled in the cold air flow cavity (12).

21. The heat exchange device according to claim 20, characterized in that, The first heat exchange structure (81) is a plate-like spiral shape; the second heat exchange structure (82) is a porous foam metal structure.

22. The heat exchange device according to claim 17, characterized in that, The heat exchange finned tube (20) includes: a spiral heat exchange tube (2032); or, a long straight heat exchange tube (2031) and a spiral heat exchange tube (2032). The spiral heat exchange tube (2032) includes multiple spiral heat exchange sub-tubes (2033) with different pitches; the multiple spiral heat exchange sub-tubes (2033) are nested one by one around the same rotation center; Among the multiple spiral heat exchange sub-tubes (2033) with different pitches, the diameter of the spiral heat exchange sub-tube (2033) located in the outer ring is larger than the diameter of the spiral heat exchange sub-tube (2033) located in the inner ring.

23. The heat exchange device according to claim 17, characterized in that, The heat exchange finned tube (20) includes: a long straight heat exchange tube (2031) and a spiral heat exchange tube (2032); the diameter of the spiral heat exchange tube (2032) is larger than the diameter of the long straight heat exchange tube (2031); The long straight heat exchange tube (2031) is located at the four corners inside the outer shell (10) of the heat exchanger unit, and at the rotation center of the spiral heat exchange tube (2032); or, The long straight heat exchange tube (2031) is located at the periphery of the heat exchanger unit shell (10) and at the rotation center of the spiral heat exchange tube (2032).

24. A heat dissipation chassis, characterized in that, Includes the heat exchange device according to any one of claims 1-23; The heat exchange device is located inside the circuit board receiving cavity (102) of the heat dissipation chassis (100) and is installed on the front shell (101) of the heat dissipation chassis (100) for dissipating heat from the heat-generating module (200) inside the heat dissipation chassis (100).

25. The heat dissipation chassis according to claim 24, characterized in that, The front shell (101) of the chassis is provided with a front shell air inlet (1011) and a front shell air outlet (1012). The front shell air inlet (1011) is provided in correspondence with the cold end air inlet (131) of the heat exchanger unit shell (10); the front shell air outlet (1012) is provided in correspondence with the cold end air outlet (132) of the heat exchanger unit shell (10).

26. The heat dissipation chassis according to claim 24, characterized in that, The heat exchange device has multiple heat exchanger units (1); the heat exchanger unit shells (10) of the multiple heat exchanger units (1) are arranged side by side at intervals; The front shell (101) of the chassis is provided with multiple front shell air inlets (1011) and multiple front shell air outlets (1012). Each of the front shell air inlets (1011) is provided in correspondence with the cold end air inlet (131) of one of the heat exchanger unit shells (10); each of the front shell air outlets (1012) is provided in correspondence with the cold end air outlet (132) of one of the heat exchanger unit shells (10).

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