Magnetic coupling driven cold plate module

Abstract

This invention provides a magnetically coupled driven cold plate module, including a cold plate, at least one impeller, and at least one magnetically coupled drive assembly. The cold plate has an inlet end and an outlet end, and a flow channel is formed inside. The impeller is disposed in the flow channel and has a first magnetic element thereon. The magnetically coupled drive assembly is disposed outside the cold plate and includes at least one support member. The support member has a second magnetic element corresponding to the first magnetic element. The impeller is driven to rotate in a non-contact manner by magnetic field coupling, causing the coolant to circulate along the flow channel. The flow channel includes a branch flow channel with a curved widening section and an oblique inlet section, which can improve the guiding and pressurizing efficiency during forward flow and form a high flow resistance zone to suppress backflow during reverse flow, thereby improving the stability of coolant circulation and the heat dissipation performance of the cold plate.

Description

Technical Field

[0001] This utility model relates to the field of cooling technology, and in particular to a cold plate module with a magnetic coupling drive mechanism that can actively promote the flow of coolant to improve heat dissipation efficiency. Background Technology

[0002] As the power of high-performance computing devices (such as servers, network switches, and AI accelerators) continues to increase, air cooling alone is no longer sufficient to effectively remove the heat generated by high-heat-flux components. Liquid cooling systems, due to their high heat exchange efficiency, are gradually becoming the mainstream heat dissipation solution. Among them, the cold plate is a crucial component in the liquid cooling system that directly contacts the heat source. It removes heat by circulating coolant through internal channels, and its fluid circulation efficiency and sealing reliability directly affect the overall heat dissipation performance.

[0003] Traditional liquid cooling architectures often employ passive cold plates, requiring an external, independent pump to circulate the coolant throughout the system. While this design is functional, it necessitates additional pumps and piping, resulting in low system integration, reduced space utilization, and complex piping layouts that hinder modular design and maintenance. Furthermore, when the external pump fails, the flow within the cold plate is interrupted, lacking localized circulation capability and leading to insufficient system reliability.

[0004] To enhance the self-circulation capability of cold plates, some technologies attempt to integrate pumps directly inside the cold plate, using a motor to drive an impeller for active pumping. However, existing designs often employ a rotating shaft that passes through the liquid-containing chamber to transmit torque, requiring the motor and control circuit board to be located adjacent to or partially within the liquid-containing space. Such structures require high-waterproof encapsulation; if the seal fails, it can easily cause liquid leakage and electrical short circuits, affecting safety and reliability, and increasing manufacturing and maintenance costs.

[0005] Another design completely encapsulates the motor within a cold plate cavity, but this still faces challenges related to heat dissipation and limited encapsulation space. Furthermore, regardless of the design, a rotating shaft and shaft seal are required; long-term operation will cause the shaft seal to wear down, reducing its sealing performance, and the potential risk of leakage remains difficult to avoid.

[0006] In terms of fluid guidance, traditional cold plates typically have a single linear flow channel that only provides fluid passage without flow direction control or backflow suppression design. When multiple cold plates are connected in series to form a circulation loop, if the internal pump of any one of the cold plates stops operating, the coolant may flow back along the reverse path, causing insufficient flow and uneven pressure drop in some areas, affecting the overall circulation stability and heat dissipation efficiency.

[0007] In summary, existing cold plates have the following problems: (i) they require external pumps to drive them, resulting in low system integration; (ii) the integrated pump structure requires the shaft to pass through the liquid-containing cavity, resulting in insufficient sealing reliability; and (iii) they lack effective backflow suppression and flow guidance structures, which can easily cause backflow and flow field instability.

[0008] Therefore, there is an urgent need for a new type of cold plate module that can drive the internal impeller to rotate externally through a non-contact magnetic coupling drive mechanism, avoiding shaft penetration and improving sealing reliability. At the same time, it can be combined with a flow channel design with flow guiding and backflow suppression functions to improve circulation efficiency and system stability. Utility Model Content

[0009] The purpose of this utility model is to provide a magnetically coupled driven cold plate module, which overcomes the problems of low system integration, complex wiring, and insufficient sealing reliability caused by the integrated pump driving the drive shaft through the liquid-containing chamber in the prior art, which require the cold plate to rely on an external pump to drive the coolant circulation. Furthermore, it solves the defects of the existing flow channel structure, which lacks backflow suppression and flow direction control and is prone to backflow and uneven flow.

[0010] To achieve the above objectives, this utility model provides a magnetically coupled driven cold plate module, comprising: a cold plate having an inlet end and an outlet end, the cold plate having a flow channel connecting the inlet end and the outlet end; at least one impeller disposed in the flow channel, each impeller having at least one first magnetic element; and at least one magnetically coupled drive assembly disposed outside the cold plate, the magnetically coupled drive assembly including a rotatable support member, each support member having at least one second magnetic element, the second magnetic element being correspondingly configured with the first magnetic element to drive the impeller to rotate through magnetic field interaction, thereby pushing the coolant to flow along the flow channel toward the outlet end. By transmitting rotational torque in a non-contact manner through magnetic field interaction, the impeller rotates within a completely sealed flow channel, achieving an active pumping function.

[0011] The cold plate includes: an upper plate body having a water inlet end and a water outlet end, the water inlet end and the water outlet end being connected to the flow channel via an inlet channel and an outlet channel respectively; and a lower plate body being combined with the upper plate body, the flow channel being disposed in at least one of the upper plate body or the lower plate body.

[0012] The flow channel includes a main flow channel and at least one branch flow channel. The main flow channel extends from the inlet end to the outlet end, and the branch flow channel diverges from a section of the main flow channel and merges with the main flow channel at another section of the main flow channel.

[0013] The flow channel is provided with a first flow guide and a second flow guide, which are located on different sides of the main flow channel and are staggered in the flow direction.

[0014] The at least one branch channel includes a first branch channel, which diverges from one side of the upstream section of the main channel and merges with the main channel in the midstream section. The first branch channel includes a first curved widening section and a first inlet section.

[0015] The at least one branch channel further includes a second branch channel, which diverges from the other side of the midstream section of the main channel and merges with the main channel in the downstream section. The second branch channel includes a second bend widening section and a second inlet section.

[0016] The first inlet segment forms a first angle with the main channel, and the second inlet segment forms a second angle with the main channel.

[0017] The at least one impeller includes a first impeller and a second impeller, the first impeller being disposed in the first curved and widened section, and the second impeller being disposed in the second curved and widened section.

[0018] Each impeller includes: a shaft spanning between the upper plate and the lower plate; a bearing fitted on the shaft; and a base fitted on the bearing and rotatable relative to the shaft, the base having a plurality of pump blades.

[0019] The upper plate and the lower plate are each provided with a support member to support and position the two ends of the shaft.

[0020] The magnetic coupling drive assembly further includes: at least one drive motor having an output shaft connected to the carrier for rotating the carrier; and a control circuit board electrically connected to the drive motor for controlling the operation of the drive motor.

[0021] It also includes a housing located outside the cold plate, and the drive motor, the carrier and the control circuit board located inside the housing.

[0022] This invention utilizes a magnetic coupling drive mechanism to transmit rotational torque via a magnetic field, enabling the impeller to operate within a completely enclosed cold plate flow channel. This eliminates the need for a rotating shaft penetrating the cold plate, thus avoiding shaft seal wear and leakage problems. Because the driving torque is transmitted via a non-contact magnetic field, the drive motor and circuit board can be located outside the cold plate, simplifying waterproofing and improving sealing reliability by preventing liquid-containing cavities from penetrating the structure. Furthermore, a branch flow channel with a curved widening section and an oblique inlet section is configured within the flow channel. In conjunction with the impeller operation, this enhances flow guidance and pressurization during forward flow and creates a high flow resistance and high vortex zone during reverse flow, effectively suppressing backflow and maintaining a stable unidirectional circulation of the coolant. With this structure, the cold plate combines active pumping and unidirectional flow guidance functions, significantly improving fluid circulation efficiency and overall heat dissipation performance. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the magnetically coupled cold plate module according to an embodiment of the present invention.

[0024] Figure 2 This is an exploded view of the main components of the magnetically coupled driven cold plate module according to an embodiment of the present invention.

[0025] Figure 3 This is a cross-sectional schematic diagram of the cold plate according to an embodiment of the present utility model.

[0026] Figure 4A This is a three-dimensional schematic diagram of the internal flow channel of the lower plate of the cold plate according to an embodiment of the present utility model.

[0027] Figure 4B This is a three-dimensional schematic diagram of the internal flow channel and two impeller configuration of the lower plate of the cold plate according to an embodiment of the present invention.

[0028] Figure 5 This is a partial cross-sectional view of the magnetic coupling drive module and the cold plate assembly according to an embodiment of the present invention.

[0029] Figure 6 for Figure 5 Enlarged cross-sectional view of the impeller located within the cold plate.

[0030] Explanation of reference numerals in the attached drawings: Magnetic coupling driven cold plate module 1; Cold plate 10; Upper plate 11; Lower plate 12; Inlet 101; Outlet 102; Inlet channel 101a; Outlet channel 102a; Flow channel 103; Main channel 103a; Upstream section 103a1; Midstream section 103a2; Downstream section 103a3; First branch flow channel 103b; First bend widening section 103b1; First inlet section 103b2; Second branch flow channel 103c; Second bend widening section 103c 1; Second inlet section 103c2; First guide section 103d; First arc surface 103d1; Second guide section 103e; Second arc surface 103e1; Grooves 103g, 104g; Impeller 20; Shaft 21; Base 22; Pump blade 23; Bearing 24; Support 25; First magnetic component 26; Magnetic coupling drive assembly 30; Drive motor 31; Output shaft 311; Bearing 32; Second magnetic component 33; Control circuit board 34; Housing 40; First included angle θ1; Second included angle θ2. Detailed Implementation

[0031] The structure and functional characteristics of the magnetically coupled driven cold plate module of this utility model are now described in conjunction with the preferred embodiment in the accompanying drawings.

[0032] Please refer to Figures 1 to 3As shown, this utility model provides a magnetically coupled driven cold plate module 1, mainly including a cold plate 10, at least one impeller 20, and at least one magnetically coupled drive assembly 30 disposed outside the cold plate 10. The cold plate 10 is used to contain and guide the circulation of coolant. The impeller 20 is disposed in the internal flow channel of the cold plate 10 and can drive the coolant flow by rotating. The magnetically coupled drive assembly 30 drives the impeller 20 to rotate in a non-contact manner through magnetic field interaction, realizing the active circulation function.

[0033] This embodiment uses two impellers 20 and corresponding two sets of magnetically coupled drive components 30 as an example to illustrate the effect of segmented pushing and flow field stabilization; however, the number and configuration of the impellers 20 and magnetically coupled drive components 30 can be adjusted according to actual needs and are not limited thereto.

[0034] The cold plate 10 has a water inlet 101 and a water outlet 102, and a flow channel 103 is formed inside it. The flow channel 103 connects the water inlet 101 and the water outlet 102, allowing coolant to circulate within it to achieve heat dissipation and flow guidance functions. The water inlet 101 and the water outlet 102 can be connected to an external cooling circuit (not shown) via external pipes (not shown) to form a closed fluid circulation system. This allows the coolant to flow into the cold plate 10 from the outside, flow along the flow channel 103 and carry away heat, and then be discharged from the water outlet 102 to the external circuit for heat dissipation or recirculation.

[0035] In this embodiment, the cold plate 10 is composed of an upper plate 11 and a lower plate 12. The upper plate 11 has a water inlet 101 and a water outlet 102, which are respectively connected to the flow channel 103 via an inlet channel 101a and an outlet channel 102a. The required flow channel 103 is formed in at least one of the upper plate 11 or the lower plate 12, and can be sealed to the upper plate 11 by welding, bonding or other airtight joint methods to prevent coolant leakage. This embodiment describes the flow channel 103 formed in the lower plate 12 as an example. In other embodiments, the upper and lower plates can also be manufactured by integral molding to simplify the process and improve sealing reliability.

[0036] Please see Figure 4A and Figure 4B As shown, the flow channel 103 includes a main flow channel 103a and first and second branch flow channels 103b and 103c. The main flow channel 103a extends in a straight line from the inlet end 101 to the outlet end 102, serving as the main flow path for the coolant; the two branch flow channels 103b and 103c are respectively located on both sides of the main flow channel 103a, thereby cooperating with the impeller 20 to form a multi-point propulsion and unidirectional circulation fluid guiding structure.

[0037] In addition, a first guide section 103d and a second guide section 103e are provided in the flow channel 103, which are located on different sides of the main flow channel 103a and are staggered from each other in the flow direction.

[0038] The main channel 103a can be divided into an upstream section 103a1, a midstream section 103a2, and a downstream section 103a3 according to the forward flow direction. In this embodiment, the upstream section 103a1 refers to the portion of the main channel extending from the position of the main channel corresponding to the inlet channel 101a to the beginning of the first guide section 103d; the midstream section 103a2 refers to the portion of the main channel extending from the beginning of the first guide section 103d to the end of the second guide section 103e; and the downstream section 103a3 refers to the portion of the main channel extending from the end of the second guide section 103e to the position corresponding to the outlet channel 102a.

[0039] To improve fluid guidance efficiency and establish a unidirectional circulation mechanism, this embodiment provides first and second branch channels 103b and 103c on both sides of the main flow channel 103a. The first branch channel 103b branches off from one side of the upstream section 103a1 and converges back into the main flow channel 103a in the midstream section 103a2; the second branch channel 103c branches off from the other side of the midstream section 103a2 and converges back into the main flow channel 103a in the downstream section 103a3. The two branch channels 103b and 103c are respectively equipped with a first impeller 20 and a second impeller 20 to perform local pressurization and flow guidance adjustment at different locations, thereby achieving the effect of stabilizing the flow field and controlling the flow direction.

[0040] The first branch channel 103b sequentially includes a first curved widening section 103b1 and a first inlet section 103b2 along the forward flow direction. The first curved widening section 103b1 is located at the branching point and is adjacent to the first guide section 103d located on one side of the main channel 103a. The end of the first guide section 103d near the first branch channel 103b forms a first arc surface 103d1, which cooperates with the arc-shaped wall surface of the inlet area of ​​the first curved widening section 103b1 to define a nearly circular widening region in the channel 103. Its cross-sectional diameter is larger than that of other sections of the main channel 103a to provide space for the first impeller 20 and ensure a stable rotation environment. The first inlet section 103b2 extends from the widened area and connects back to the main channel 103a in an oblique manner, forming a first angle θ1 (between 15° and 60°) with the main channel. It can be introduced smoothly when flowing in the forward direction, and will generate deflection and shearing effects to increase flow resistance when flowing in the reverse direction.

[0041] Specifically, during forward flow, the first impeller 20 is actively driven to rotate by the external magnetic coupling drive assembly 30 through magnetic field torque. During rotation, it can guide and pressurize the surrounding coolant, causing some coolant to circulate through the first curved and widened section 103b1, and then be propelled by the pump impeller 23 into the first inlet section 103b2, before being injected back into the main channel 103a. This process pressurizes and superimposes the flow velocity of the coolant flowing through the main channel 103a at the midstream position, thereby improving the overall fluid circulation efficiency. During reverse flow, the coolant enters the first branch channel 103b from the confluence point, first passing through the first inlet section 103b2. Since the inlet section forms a first angle θ1 with the main channel 103a, the coolant deflects and shears when flowing in reverse, resulting in flow separation and local vortices, forming initial resistance. Subsequently, the coolant enters the first curved and widened section 103b1. Due to the expansion of the flow channel, the flow velocity decreases and the static pressure increases. Furthermore, the fluid disturbance and diversion effect caused by the rotation of the impeller 20 further form a high vortex region, significantly increasing the reverse flow resistance. Through the cooperation of the first inlet section 103b2, the first curved and widened section 103b1, and the first impeller 20, a high vortex and high flow resistance region can be established during reverse flow, suppressing backflow and ensuring that the coolant mainly flows stably in the forward direction.

[0042] The structure and function of the second branch channel 103c are similar to those of the first branch channel 103b. It branches off from the main channel 103a2 in the middle section and merges back into the main channel in the downstream section 103a3. Along the flow direction, it sequentially includes a second curved widening section 103c1 and a second inlet section 103c2. The second curved widening section 103c1 cooperates with the second arc surface 103e1 of the second guide section 103e to define a nearly circular widening area in the channel 103 for the second impeller 20 to be installed. The second inlet section 103c2 connects to the main channel 103a at an angle, forming a second included angle θ2 (between 15° and 60°) to guide and accelerate the flow in the forward direction and to generate deflection and interference in the reverse direction.

[0043] In forward flow, the second impeller 20 can further propel and accelerate the coolant flowing through the midstream section, reinjecting it into the downstream section of the main flow channel 103a via the second inlet section 103c2, creating secondary pressurization and increasing the terminal pressure and flow rate. In reverse flow, the coolant entering the second inlet section 103c2 is deflected and sheared due to the oblique structure, subsequently forming a high vortex region within the second curved widening section 103c1. Combined with the blocking effect of the second impeller 20, the overall flow resistance increases significantly. Through the geometric design of the first and second branch flow channels and the impeller operation, multi-stage propulsion and velocity superposition can be achieved in the forward direction, while high flow resistance and a high vortex region can be established in the reverse direction, ensuring stable circulation of the coolant in a single direction and improving overall fluid control performance.

[0044] Please see Figure 2 , Figure 5 and Figure 6 As shown, each impeller 20 in this embodiment includes a shaft 21, a bearing 24, a base 22, and two support members 25.

[0045] The shaft 21 is longitudinally positioned between the upper plate 11 and the lower plate 12, with its two ends inserted into the grooves 103g and 104g formed by the upper plate 11 and the lower plate 12, respectively. The support member 25 is embedded in these grooves for support and positioning, thereby limiting the axial and radial displacement of the shaft 21 caused by eccentric force during magnetic coupling drive and ensuring the stability of the impeller 20 during operation.

[0046] The bearing 24 is mounted on the shaft 21 and may be made of ceramic, stainless steel or other materials with high wear resistance and low coefficient of friction to provide smooth rotational support and improve durability.

[0047] The base 22 is fitted onto the outside of the bearing 24 and can rotate freely relative to the shaft 21. Its shape can be disc-shaped or other symmetrical structures to maintain dynamic balance and stability during rotation. One side surface of the base 22 forms multiple sets of pump blades 23 arranged circumferentially at intervals. Each pump blade 23 has a predetermined inclination angle. When the base 22 is driven to rotate by the external magnetic coupling drive assembly 30, it can generate thrust on the coolant and actively push the coolant to flow along the flow channel 103 towards the outlet, thereby improving fluid circulation efficiency.

[0048] The support 25 can be made of ceramic gasket, stainless steel or engineering plastic to provide high wear resistance, low friction and precise positioning effect, ensuring the stability and reliability of impeller rotation.

[0049] Please see Figure 4B , Figure 5 and Figure 6 As shown, in this embodiment, each impeller 20 has a base 22 with at least one first magnetic element 26 on the surface opposite to the pump blade 23. The first magnetic element 26 can be a single magnet or a plurality of magnets arranged in a ring-like pattern along the outer periphery of the base 22 to form a stable and uniform magnetic field distribution. In this embodiment, multiple neodymium iron boron (NdFeB) strong magnets are embedded on the back of the base 22 to maintain rotational balance and magnetic coupling stability.

[0050] For each impeller 20, a magnetic coupling drive assembly 30 is provided on the outside of the cold plate 10, for example, on the outer surface of the upper plate 11. The magnetic coupling drive assembly 30 mainly includes a drive motor 31 and a support member 32, which are used to drive the impeller to rotate through magnetic field interaction.

[0051] The drive motor 31 has an output shaft 311 connected to the carrier 32, which transmits the rotational torque of the motor to the carrier 32. The drive motor 31 can be a conventional structure, including a stator and a rotor (not shown), and is powered by a control circuit board 34 to generate a rotating magnetic field, which drives the carrier 32 to rotate.

[0052] The support member 32 is located at the output end of the drive motor 31 and can be driven to rotate. At least one second magnetic member 33 is provided on the side surface facing the cold plate 10. The arrangement and position of the second magnetic member 33 correspond to the first magnetic member 26 inside the cold plate. The two are arranged opposite each other through the wall of the upper plate 11 to form a magnetic field interaction.

[0053] When the drive motor 31 operates, the carrier 32 rotates, driving the second magnetic component 33 to rotate synchronously. Non-contact torque transmission is generated through magnetic field coupling, thereby driving the impeller 20 located within the flow channel 103 to rotate and propelling the coolant along the flow channel towards the outlet. The second magnetic component 33 can also be a neodymium iron boron magnet, interlocked in a ring on the surface of the carrier 32 to ensure balanced magnetic force and stable rotation. This invention is not limited to a specific number or arrangement of magnets; any design that maintains stable magnetic coupling and effective torque transmission is feasible.

[0054] The magnetic coupling drive cold plate module 1 in this embodiment also includes a housing 40, which is fixedly disposed outside the cold plate 10 to cover and position the drive motor 31, the carrier 32, and the control circuit board 34. This configuration can effectively prevent dust, moisture, or other external contaminants from entering, and maintain the operational stability and lifespan of the magnetic coupling drive assembly 30.

[0055] The control circuit board 34 is disposed inside the housing 40, adjacent to and electrically connected to the drive motor 31, for controlling its start, stop and speed, and can be fixed to the inner surface of the housing 40, such as the top, side wall or bottom, by fasteners or other suitable means. The control circuit board 34 can also be connected to an external power supply or control system (not shown) to provide power and control signals to ensure the stable operation and control of the drive motor 31.

[0056] In summary, this invention utilizes a magnetic coupling drive structure. Through a magnetic coupling drive component located outside the cold plate, it drives the impeller within the cold plate's flow channel using magnetic torque transmission, achieving stable and effective drive performance without requiring a through-shaft design. This structure completely isolates the drive motor and circuit board from the coolant, avoiding risks caused by shaft seal wear or leakage. It also eliminates the need for additional waterproof encapsulation of the motor and control circuit board, reducing manufacturing and assembly difficulty and improving the sealing reliability and durability of the cold plate module. Furthermore, the impeller is directly positioned within the cold plate's internal flow channel, enabling active circulation and propulsion within the cold plate. This replaces the traditional design requiring an external independent pump module and complex piping, further simplifying the system structure, reducing space occupation, and improving overall integration. Regarding fluid motion, the first and second branch flow channels within the flow channel each have a curved widening section and an inlet section, housing the first and second impellers respectively. These impellers can repeatedly pressurize and accelerate the fluid during forward flow, increasing flow rate and optimizing flow field stability. In reverse flow conditions, the widened section and impeller structure create significant vortex and obstruction effects, substantially increasing reverse flow resistance, suppressing backflow, and ensuring stable unidirectional circulation of the coolant primarily from the inlet to the outlet. With this configuration, this invention can maintain stable flow and efficient heat exchange in high-heat-load applications, demonstrating excellent heat dissipation performance.

[0057] The present invention has been described in detail above. However, the above description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made based on the present invention should still fall within the patent coverage of the present invention.

Claims

1. A magnetic coupling driven cold plate module, characterized in that, include: A cold plate has a water inlet and a water outlet. A flow channel is provided inside the cold plate, and the flow channel connects the water inlet and the water outlet. At least one impeller is disposed in the flow channel, and each impeller is provided with at least one first magnetic element; and At least one magnetically coupled drive assembly is disposed outside the cold plate. The magnetically coupled drive assembly includes a carrier member that can be driven to rotate. Each carrier member is provided with at least one second magnetic element. The second magnetic element is configured corresponding to the first magnetic element so as to drive the impeller to rotate through magnetic field interaction and push the coolant to flow along the flow channel toward the outlet end.

2. The magnetically coupled cold plate module of claim 1, wherein, The cold plate includes: An upper plate body is provided with an inlet end and an outlet end, the inlet end and the outlet end being respectively connected to the flow channel via an inlet channel and an outlet channel; and The lower plate is combined with the upper plate, and the flow channel is disposed in at least one of the upper plate or the lower plate.

3. The magnetically coupled cold plate module of claim 2, wherein, The flow channel includes a main channel and at least one branch channel. The main channel extends from the inlet end to the outlet end, and the branch channel diverges from a section of the main channel and merges with the main channel in another section of the main channel.

4. The magnetically coupled cold plate module of claim 3, wherein, The flow channel is provided with a first flow guide and a second flow guide, which are located on different sides of the main flow channel and are staggered in the flow direction.

5. The magnetically coupled cold plate module of claim 4, wherein, This main channel includes: An upstream section refers to the portion of the main channel extending from the location of the main channel corresponding to the inlet channel to the beginning of the first guide section. A midstream section refers to the main channel portion from the beginning of the first guide section to the end of the second guide section; and A downstream section refers to the main channel portion extending from the end of the second guide section to the corresponding position of the outlet channel.

6. The magnetically coupled cold plate module of claim 5, wherein, The at least one branch channel includes a first branch channel that branches off from one side of the upstream section of the main channel and merges with the main channel in the midstream section. The first branch channel includes a first curved widening section and a first inlet section.

7. The magnetically coupled cold plate module of claim 6, wherein, The at least one branch channel also includes a second branch channel, which diverges from one side of the midstream section of the main channel and merges with the main channel in the downstream section. The second branch channel includes a second bend widening section and a second inlet section.

8. The magnetically coupled cold plate module of claim 7, wherein, The first inlet segment forms a first angle with the main channel, and the second inlet segment forms a second angle with the main channel.

9. The magnetically coupled cold plate module of claim 7, wherein, The at least one impeller includes a first impeller and a second impeller, the first impeller being disposed in the first curved and widened section, and the second impeller being disposed in the second curved and widened section.

10. The magnetically coupled cold plate module of claim 2, wherein, Each impeller includes: A central axis is positioned between the upper plate and the lower plate. A bearing, fitted onto the shaft; and A base is fitted onto the bearing and is rotatable relative to the shaft, and the base is formed with a plurality of pump blades.

11. The magnetically coupled cold plate module of claim 10, wherein, The upper plate and the lower plate are each provided with a support member to support and position the two ends of the shaft.

12. The magnetically coupled cold plate module of claim 1, wherein, The magnetic coupling drive component also includes: At least one drive motor having an output shaft connected to the carrier member for driving the carrier member to rotate; and A control circuit board is electrically connected to the drive motor to control the operation of the drive motor.

13. The magnetically coupled cold plate module of claim 12, wherein, A housing is also included, which is disposed outside the cold plate, and the driving motor, the carrier and the control circuit board are disposed in the housing.

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