Miniature heat dissipation device, control method and terminal equipment

Abstract

The invention provides a miniature heat dissipation device, and the device comprises a medium pipeline which is of a closed-loop structure and is internally provided with a cooling medium; the propeller is arranged in the medium pipeline and used for pushing the cooling medium to flow; the electromagnet is arranged on the outer side of the medium pipeline and used for converting electric energy into a magnetic field for pushing the propeller to move; and the power supply is electrically connected with the electromagnet so as to provide electric energy for the electromagnet. The invention further provides a control method of the miniature heat dissipation device and terminal equipment.

Description

Technical Field

[0001] This disclosure relates to the field of heat dissipation technology, and in particular to a miniature heat dissipation device, control method, and terminal equipment. Background Technology

[0002] With the continuous advancement of smart terminal technology, smart terminals integrate multiple functions. When running power-intensive applications such as games, smart terminals generate significant heat. If this heat cannot be dissipated quickly, it can affect the operating speed and stability of the smart terminal. Current heat dissipation devices with good heat dissipation efficiency are relatively large and cannot be adapted to the application scenarios of smart terminals. Therefore, there is a need for a miniature heat dissipation device with high heat dissipation efficiency to meet the heat dissipation requirements of smart terminals. Summary of the Invention

[0003] This disclosure provides a miniature heat dissipation device, a control method, and a terminal device.

[0004] In a first aspect, embodiments of this disclosure provide a miniature heat dissipation device, comprising:

[0005] A medium pipeline, wherein the medium pipeline is a closed-loop structure and a cooling medium is disposed therein;

[0006] A propeller, disposed within the medium conduit, is used to drive the flow of the cooling medium;

[0007] An electromagnet, located on the outside of the medium pipe, is used to convert electrical energy into a magnetic field that drives the thruster.

[0008] A power source, electrically connected to the electromagnet, provides electrical energy to the electromagnet.

[0009] Secondly, embodiments of this disclosure provide a control method for a miniature heat dissipation device, including:

[0010] A miniature heat dissipation device is provided, comprising a medium pipe, a thruster, an electromagnet, and a power source. The cooling medium circulates within the medium pipe, and the thruster is disposed within the medium pipe to propel the flow of the cooling medium. The electromagnet is disposed outside the medium pipe to convert electrical energy into a magnetic field that propels the thruster. The power source is electrically connected to the electromagnet to provide electrical energy to the electromagnet.

[0011] The power source supplies power to the electromagnet, and the electromagnetic force generated by the electromagnet drives the propeller to move within the medium pipeline, thereby propelling the cooling medium to flow within the medium pipeline.

[0012] Thirdly, embodiments of this disclosure provide a terminal device including a miniature heat dissipation device, wherein the miniature heat dissipation device includes the miniature heat dissipation device provided in embodiments of this disclosure.

[0013] The miniature heat dissipation device in this embodiment places the thruster inside the medium pipe and the electromagnet outside the medium pipe. The electromagnet converts the electrical energy provided by the power supply into electromagnetic force, thereby driving the thruster to move inside the medium pipe, and in turn driving the cooling medium to flow inside the medium pipe. The electromagnetic force generated by the electromagnet is completely transferred to the cooling medium, which can improve power utilization and reduce power consumption. Moreover, the medium pipe will not be deformed by pressure, which can reduce the wear of the medium pipe and thus improve the service life of the medium pipe. Attached Figure Description

[0014] In the accompanying drawings of the embodiments disclosed herein:

[0015] Figure 1 This is a schematic diagram of the structure of a miniature heat dissipation device provided in an embodiment of the present disclosure;

[0016] Figure 2 This is a partial structural schematic diagram of a miniature heat dissipation device provided in an embodiment of the present disclosure;

[0017] Figure 3 A schematic diagram of the structure of an electromagnet provided in an embodiment of this disclosure;

[0018] Figure 4 A schematic diagram of the thruster provided in an embodiment of this disclosure;

[0019] Figure 5 A schematic diagram of another thruster provided in an embodiment of this disclosure;

[0020] Figure 6 A schematic diagram of another thruster provided in an embodiment of this disclosure;

[0021] Figure 7 A flowchart illustrating a control method for a miniature heat dissipation device provided in this disclosure embodiment;

[0022] Figure 8 This is a schematic diagram of the thruster in its natural state according to an embodiment of this disclosure;

[0023] Figure 9 This is a schematic diagram of the thruster when the first electromagnet unit A1 and the second electromagnet unit B1 are energized in an embodiment of this disclosure;

[0024] Figure 10 This is a schematic diagram of the thruster when the first electromagnet unit A2 and the second electromagnet unit B2 are energized and the first electromagnet unit A1 and the second electromagnet unit B1 are de-energized, according to an embodiment of this disclosure.

[0025] Figure 11 This is a schematic diagram showing the thruster reaching the termination position in an embodiment of this disclosure;

[0026] Figure 12 This is a schematic diagram of the thruster returning to its starting position in an embodiment of this disclosure. Detailed Implementation

[0027] To enable those skilled in the art to better understand the technical solutions of this disclosure, the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings.

[0028] The present disclosure will be described more fully below with reference to the accompanying drawings; however, the embodiments shown may be embodied in different forms, and the present disclosure should not be construed as limited to the embodiments set forth below. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will enable those skilled in the art to fully understand the scope of the disclosure.

[0029] The accompanying drawings of the embodiments disclosed herein are provided to further illustrate the embodiments of this disclosure and form part of the specification. They are used together with the detailed embodiments to explain this disclosure and do not constitute a limitation thereof. The above and other features and advantages will become more apparent to those skilled in the art from the description of the detailed embodiments with reference to the accompanying drawings.

[0030] This disclosure may be described with reference to plan and / or cross-sectional views using the ideal schematic diagrams of this disclosure. Therefore, the example illustrations may be modified according to manufacturing techniques and / or tolerances.

[0031] Where there is no conflict, the various embodiments of this disclosure and the features thereof in the embodiments may be combined with each other.

[0032] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to limit the disclosure. The term "and / or" as used in this disclosure includes any and all combinations of one or more of the associated enumerated entries. The singular forms "a" and "the" as used in this disclosure are also intended to include the plural forms, unless the context clearly indicates otherwise. The terms "comprising," "made of," etc., as used in this disclosure specify the presence of the stated feature, integral, step, operation, element, and / or component, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components, and / or groups thereof.

[0033] Unless otherwise specified, all terms used in this disclosure (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art. It will also be understood that terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and this disclosure, and will not be interpreted as having an idealized or overly formal meaning, unless expressly so defined in this disclosure.

[0034] In some related technologies, a cooling medium is placed inside a medium pipeline, and a magnet and a coil are placed outside the medium pipeline. When the coil is energized, it generates an attraction force, and the magnet squeezes and deforms the medium pipeline. The cooling medium flows inside the medium pipeline due to the compression of the medium pipeline. The medium pipeline is easily worn due to compression, which reduces the service life of the medium pipeline. Moreover, the magnet needs to overcome the elasticity of the medium pipeline to push the cooling medium to flow, which is a waste of work, resulting in low power utilization and high power consumption.

[0035] In a first aspect, the present disclosure provides a miniature heat dissipation device that not only meets the heat dissipation needs of smart terminals, but also has high power utilization and can improve the service life of medium pipelines.

[0036] Figure 1 This is a schematic diagram of a miniature heat dissipation device provided in an embodiment of this disclosure. Figure 2 This is a partial structural schematic diagram of a miniature heat dissipation device provided in an embodiment of this disclosure. (In conjunction with...) Figure 1 and Figure 2 The miniature heat dissipation device includes a medium pipe 1, a thruster 2, an electromagnet 3, and a power supply 4. The medium pipe 1 is a closed-loop structure containing a cooling medium that circulates within it. The coolant can flow in either a counter-clockwise or clockwise direction. For ease of description, this embodiment uses counter-clockwise flow of the cooling medium as an example.

[0037] In some embodiments, the medium conduit 1 can be a flat conduit, which reduces the thickness of the micro heat dissipation device to suit the application scenarios of smart terminals. The cooling medium can be a liquid such as water. It should be noted that the thickness of the micro heat dissipation device refers to its dimension perpendicular to the surface of the smart terminal after the micro heat dissipation device is installed on the surface of the smart terminal. Similarly, the thickness of the medium conduit 1 also refers to its dimension perpendicular to the surface of the smart terminal.

[0038] The propeller 2 is installed inside the medium pipeline 1 to drive the flow of the cooling medium. The propeller 2 can move inside the medium pipeline 1 and drive the cooling medium to flow inside the medium pipeline 1.

[0039] Electromagnet 3 is located on the outside of the medium pipe and is used to convert electrical energy into a magnetic field that propels the thruster.

[0040] The power source 4 is electrically connected to the electromagnet 3 to provide electrical energy to the electromagnet 3.

[0041] In some embodiments, the electromagnet 3 includes a plurality of first electromagnet units and a plurality of second electromagnet units, wherein the plurality of first electromagnet units are arranged on a first side of the medium pipe along the cooling medium flow direction, and the plurality of second electromagnet units are arranged on a second side of the medium pipe along the cooling medium flow direction. The first side and the second side are two opposite sides of the medium pipe.

[0042] Figure 2 The medium pipeline shown is Figure 1 The lower half of the medium pipeline, that is, the part closest to control circuit 5. It's not difficult to understand that when... Figure 2 The medium pipeline shown is taken from Figure 1 When the middle medium pipeline is in its upper half, i.e., the part farthest from control circuit 5, at... Figure 2 The first and second sides are exactly opposite, that is, the lower side of the medium pipe is the first side, and the upper side of the medium pipe is the second side.

[0043] Figure 3 This is a schematic diagram of the structure of an electromagnet provided in an embodiment of this disclosure. Figure 3 The electromagnet 3 includes n first electromagnet units A1, A2, A3...An and n second electromagnet units B1, B2, B3...Bn. The n first electromagnet units A1, A2, A3...An are arranged sequentially along the flow direction of the cooling medium on the first side of the medium pipe 1, and the n second electromagnet units B1, B2, B3...Bn are arranged closely together along the flow direction of the cooling medium on the first side of the medium pipe 1. Here, n is an integer greater than 1.

[0044] In other embodiments, first electromagnet units A1, A2, A3...An are arranged at intervals along the flow direction of the cooling medium on the first side of the medium pipe 1, and second electromagnet units B1, B2, B3...Bn are arranged at intervals along the flow direction of the cooling medium on the first side of the medium pipe 1.

[0045] It should be noted that the first side and the second side are two opposite sides of the medium pipeline. For example, the first side is... Figure 3 The upper side shown, the second side is Figure 3 The lower side is shown in the image.

[0046] In some embodiments, the n first electromagnet units A1, A2, A3...An and the n second electromagnet units B1, B2, B3...Bn can all be devices such as coils that can generate magnetic field force when energized.

[0047] Figure 4 This is a schematic diagram of the thruster provided in an embodiment of this disclosure. Figure 4As shown, the thruster 2 includes a first magnet 21, a second magnet 22 and a connecting plate 24, wherein the first magnet 21 is fixedly connected to the first end of the connecting plate 24, the second magnet 22 is fixedly connected to the second end of the connecting plate 24, and the magnetic poles of the first magnet 21 and the second magnet 22 are in the same direction.

[0048] In some embodiments, the first magnet 21 and the second magnet 22 are made of magnetic materials, and the connecting plate 24 is made of a non-magnetic material. This disclosure does not limit the shape of the first magnet 21 and the second magnet 22; for example, the shapes of the first magnet 21 and the second magnet 22 can be spherical.

[0049] In some embodiments, the connecting plate 24 is in the shape of a flat plate or a curved plate.

[0050] like Figure 4 As shown, the bending direction of the connecting plate 24 is from the second side of the medium pipe 1. Figure 4 The lower side of medium medium pipe 1 faces the first side. Figure 4 The medium-medium pipeline 1 bends in the direction of its upper side. When the second end of the thruster 2 is subjected to an attractive force, it adheres to the first side of the medium-medium pipeline 1. When the second end of the thruster 2 is subjected to a repulsive force, it moves away from the first side of the medium-medium pipeline 1.

[0051] Figure 5 A schematic diagram of another thruster provided in this disclosure embodiment is shown below. Figure 5 As shown, the thruster 2 includes a first magnet 21, a second magnet 22, an auxiliary body 23, and a connecting plate 24. The connecting plate includes a first connecting plate 241 and a second connecting plate 242. The first magnet 21 is fixedly connected to the first end of the first connecting plate 241, the auxiliary body 23 is fixedly connected to the second end of the first connecting plate 241, the auxiliary body 23 is fixedly connected to the first end of the second connecting plate 242, and the second magnet 22 is fixedly connected to the second end of the second connecting plate 242. That is, the auxiliary body 23 is fixedly connected to both the first connecting plate 241 and the second connecting plate 242.

[0052] In some embodiments, the first magnet 21 and the second magnet 22 are made of magnetic materials, while the auxiliary body 23 and the connecting plate 24 are made of non-magnetic materials. This disclosure does not limit the shapes of the first magnet 21, the second magnet 22, and the auxiliary body 23; for example, the shapes of the first magnet 21, the second magnet 22, and the auxiliary body 23 can be spherical or other shapes. This disclosure does not limit the magnetic poles of the first magnet 21 and the second magnet 22. For example, the first pole (upper half) of the first magnet 21 and the second magnet 22 can be N poles, and the second pole (lower half) can be S poles; or, the first pole of the first magnet 21 and the second magnet 22 can be S poles, and the second pole can be N poles; or, the polarity of the first magnet 21 is N pole, and the polarity of the second magnet 21 is S pole; or, the polarity of the first magnet 21 is S pole, and the polarity of the second magnet 21 is N pole. For ease of explanation, this embodiment of the present disclosure uses the example of the first magnet 21 having the first pole as the N pole and the second pole as the S pole, and the second magnet 22 having the first pole as the N pole and the second pole as the S pole.

[0053] In some embodiments, the plane containing the first connecting plate 241 and the plane containing the second connecting plate 242 are the same plane. The first connecting plate 241 connects the first magnet 21 and the third magnet 23, and the second connecting plate 242 connects the second magnet 22 and the third magnet 23. The centers of symmetry of the first magnet 21, the second magnet 22, and the third magnet 23 are on a straight line.

[0054] In other embodiments, the plane containing the first connecting plate 241 and the plane containing the second connecting plate 242 are arranged to intersect, and the plane containing the second connecting plate 242 extends toward the first side of the medium pipeline.

[0055] In some embodiments, when the electromagnet 3 fills the entire medium pipe 1, the thruster 2 moves in an internal circulation within the medium pipe 1.

[0056] In other embodiments, the electromagnet 3 is only disposed in a portion of the medium pipe 1, such as only in the propulsion region of the medium pipe 1, and the thruster 2 reciprocates in the propulsion region. When it is necessary to propel the cooling medium, the second end of the thruster 2 is in contact with the first side of the medium pipe 1, and the first end of the thruster 2 is in contact with the second side of the medium pipe 1. When the thruster 2 moves, it can propel the cooling medium to flow. When the thruster 2 returns to its original position, the second end of the thruster 2 moves away from the first side of the medium pipe 1, and the first end of the thruster 2 is in contact with the second side of the medium pipe 1. The thruster 2 will not cause the cooling medium to flow.

[0057] In some embodiments, the medium conduit 1 in the propulsion region has a flat shape, such as a rectangular or rounded rectangle in the cross-section (fluid cross-section) perpendicular to the flow direction. This disclosure does not limit the shape of other regions of the medium conduit 1.

[0058] In some embodiments, a first isolation barrier 61 and a second isolation barrier 62 may be provided on both sides of the propulsion area. The first isolation barrier 61 and the second isolation barrier 62 may be a mesh structure. The cooling medium can pass through the first isolation barrier 61 and the second isolation barrier 62, but can block the propeller 2 from passing through, thereby causing the propeller 2 to reciprocate between the first isolation barrier 61 and the second isolation barrier 62.

[0059] Figure 6 This is a schematic diagram of another thruster provided as an embodiment of the present disclosure. (In conjunction with...) Figure 2 , Figure 5 and Figure 6 The length of the thruster 2 is greater than the maximum diameter of the medium pipeline 1, which prevents the thruster 2 from rotating arbitrarily within the medium pipeline 1. The length of the thruster 2 refers to the straight-line distance between the first magnet 21 and the second magnet 22.

[0060] When the first end of the thruster 2 is attached to the second side of the medium pipe 1 and the second end is attached to the first side of the medium pipe 1, the thruster 2 can be attached to the inner wall of the medium pipe 1, which can more effectively push the cooling medium to flow in the medium pipe 1.

[0061] like Figure 3 As shown, assuming the cooling medium flows from left to right, the propeller 2 moves from the first isolation barrier 61 to the second isolation barrier 62, propelling the cooling medium. When the propeller 2 propels the cooling medium, its second end is in contact with the first side of the medium pipe 1, and its first end is in contact with the second side of the medium pipe 1, covering the fluid cross-section of the medium pipe 1. During the resetting process, the second end of the propeller 2 moves away from the first side of the medium pipe 1, while its first end remains in contact with the second side of the medium pipe 1. The propeller 2 no longer covers the fluid cross-section of the medium pipe 1 and therefore does not allow the cooling medium to flow.

[0062] It should be noted that if the flow direction of the cooling medium is... Figure 3 If the flow direction is counterclockwise, then the initial position of thruster 2 is on the left side of the propulsion area, and the final position is on the right side of the propulsion area. If the flow direction of the cooling medium is... Figure 3 If we rotate clockwise, the initial position of thruster 2 is on the right side of the propulsion area, and the final position is on the left side of the propulsion area.

[0063] In some embodiments, the distance between the first side of the propulsion region and the nearest second electromagnet unit to the first side of the propulsion region is less than or equal to the length of the propulsion device. The distance between the second side of the propulsion region and the nearest first electromagnet unit to the second side of the propulsion region is less than or equal to the length of the propulsion device.

[0064] like Figure 3As shown, the first side of the propulsion area is a first isolation barrier 61, and the second side of the propulsion area is a second isolation barrier 62. The distance L1 between the first isolation barrier 61 and the second electromagnet unit B1 closest to the first isolation barrier 61 is less than or equal to the length of the propeller. The distance L2 between the second isolation barrier 62 and the first electromagnet unit An closest to the second isolation barrier 62 is less than or equal to the length of the propeller. This avoids the second magnet 22 being attracted by the attractive force generated by the second electromagnet unit when the propeller 2 is in the initial position, and avoids the first magnet 21 being attracted by the attractive force generated by the first electromagnet unit when the propeller 2 is in the final position.

[0065] In some embodiments, the miniature heat dissipation device further includes a control circuit 5 for controlling the switching of the power supply 4 with the first electromagnet units A1, A2, A3...An and the second electromagnet units B1, B2, B3...Bn, as well as the magnetic field directions of the first electromagnet units A1, A2, A3...An and the second electromagnet units B1, B2, B3...Bn.

[0066] In some embodiments, the control circuit 5 includes multiple control switches K1, K2...Kn, with each electromagnet 3 corresponding to one control switch, which are used to control the on / off state of the power supply 4 and the corresponding electromagnet 3, where n is an integer greater than 1.

[0067] When the first magnet 21 has an N pole near the first side and an S pole near the second side, the control circuit 5 can control the first electromagnet units A1, A2, A3...An to generate either an N pole or an S pole, and the second electromagnet units B1, B2, B3...Bn to generate an N pole. Alternatively, when the first magnet 21 has an S pole near the first side and an N pole near the second side, the control circuit 5 can control the first electromagnet units A1, A2, A3...An to generate either an N pole or an S pole, and the second electromagnet units B1, B2, B3...Bn to generate an S pole.

[0068] When the thruster 2 propels the cooling medium from its initial position, the first electromagnet units A1, A2, A3...An are sequentially connected to the power supply, generating an S pole. The second magnet 22 of the thruster 2 is attracted sequentially by the first electromagnet units A1, A2, A3...An, causing it to move from the first electromagnet unit A1 towards the final position of the first electromagnet unit An. When the second magnet 22 of the thruster 2 is attracted by the first electromagnet units A1, A2, A3...An, it comes into contact with the inner wall of the first side of the medium pipe 1.

[0069] While the first electromagnet units A1, A2, A3...An are sequentially connected to the power supply, the second electromagnet units B1, B2, B3...Bn are sequentially connected to the power supply, generating an N pole polarity. This causes the first magnet 21 of the thruster 2 to move from the second electromagnet unit B1 to the second electromagnet unit Bn. When the first magnet 21 of the thruster 2 is attracted by the second electromagnet units B1, B2, B3...Bn, the first magnet 21 of the thruster 2 comes into contact with the inner wall of the second side of the medium pipe 1.

[0070] Under the combined action of the attractive forces of the first electromagnet units A1, A2, A3...An and the second electromagnet units B1, B2, B3...Bn, the thruster 2 adheres to the inner wall of the medium pipe 1, propelling the cooling medium... Figure 3 The flow direction shown is from left to right.

[0071] like Figure 12 As shown, when the thruster 2 returns from the terminated position to the starting position, the first electromagnet units A1, A2, A3...An are connected to the power supply in reverse order, generating an N pole polarity. The second magnet 22 of the thruster 2 is repelled by the first electromagnet units An...A3, A2, A1 in sequence, causing the second magnet 22 of the thruster 2 to move from the first electromagnet unit An towards the first electromagnet unit A1. When the second magnet 22 of the thruster 2 is repelled by the first electromagnet units A1, A2, A3...An, the second magnet 22 of the thruster 2 moves away from the inner wall of the first side of the medium pipe 1.

[0072] While the first electromagnet units A1, A2, A3...An are connected to the power supply in reverse order, the second electromagnet units B1, B2, B3...Bn are also connected to the power supply in reverse order, generating an N pole polarity. This causes the first magnet 21 of the thruster 2 to move from the second electromagnet unit Bn to the second electromagnet unit B1. When the first magnet 21 of the thruster 2 is attracted by the second electromagnet units Bn...B3, B2, B1, the first magnet 21 of the thruster 2 comes into contact with the inner wall of the second side of the medium pipe 1.

[0073] Under the combined action of the repulsive force of the first electromagnet units A1, A2, A3...An and the attractive force of the second electromagnet units B1, B2, B3...Bn, the thruster 2 returns to its initial position. Moreover, since the thruster 2 does not adhere to the inner wall of the medium pipe 1, the cooling medium does not flow in the reverse direction (from right to left).

[0074] like Figure 1 As shown, the miniature heat dissipation device also includes:

[0075] The heat-absorbing plate 7 is fitted to the medium pipe 1 and is used to transfer the heat released by the heating element to the cooling medium inside the medium pipe. The heat-absorbing plate 7 can be fitted to the heating element to efficiently absorb the heat released by the heating element, and then transfer the heat to the cooling medium through the pipe wall of the medium pipe 1.

[0076] The heat sink 8 is fitted into the medium pipe 1 and is used to release heat from the cooling medium. The heat in the cooling medium is transferred to the heat sink 8 through the pipe wall of the medium pipe 1, and the heat sink 8 releases the heat.

[0077] In some embodiments, the heat sink 8 can be placed in a location where heat dissipation is easily achieved, or the frame and housing of the terminal device can be used directly as the heat sink 8. The cooling medium in the medium pipe 1 can transfer the heat absorbed by the heat absorber 7 to the heat sink 8, which then dissipates the heat.

[0078] The miniature heat dissipation device in this embodiment places the thruster inside the medium pipe and the electromagnet outside the medium pipe. The electromagnet converts the electrical energy provided by the power supply into electromagnetic force, thereby driving the thruster to move inside the medium pipe. The thruster drives the cooling medium to flow inside the medium pipe. In this way, the electromagnetic force can be completely transferred to the cooling medium, which can improve power utilization and reduce power consumption. Moreover, the medium pipe will not be deformed by pressure, which can reduce the wear of the medium pipe and thus improve the service life of the medium pipe.

[0079] Secondly, embodiments of this disclosure provide a control method for a miniature heat dissipation device, which is a control method executed based on the miniature heat dissipation device provided in the embodiments of this disclosure.

[0080] Figure 7 A flowchart illustrating a control method for a miniature heat dissipation device according to an embodiment of this disclosure is provided. Figure 7 As shown, this disclosure provides a control method for a miniature heat dissipation device, applied to a miniature heat dissipation device. The miniature heat dissipation device includes a medium pipe, a thruster, an electromagnet, and a power source. The cooling medium circulates within the medium pipe. The thruster is disposed within the medium pipe to propel the flow of the cooling medium. The electromagnet is disposed outside the medium pipe to convert electrical energy into a magnetic field that propels the thruster. The power source is electrically connected to the electromagnet to provide electrical energy to the electromagnet. The specific structure of the miniature heat dissipation device will not be described in detail here.

[0081] The control method provided in this disclosure includes:

[0082] In step S701, the power supply supplies power to the electromagnet, and the electromagnetic force generated by the electromagnet drives the propeller to move inside the medium pipe. The propeller drives the cooling medium to flow inside the medium pipe.

[0083] Since the thruster is located inside the medium pipeline, the electromagnetic force provided by the electromagnet only needs to overcome the resistance of the cooling medium, not the deformation resistance of the pipeline, to drive the cooling medium to flow in the medium pipeline. This can improve power utilization and reduce power consumption. Moreover, the medium pipeline will not be deformed by pressure, which can reduce wear on the medium pipeline and thus improve its service life.

[0084] In some embodiments, the electromagnet includes: n first electromagnet units and n second electromagnet units, wherein the n first electromagnet units are arranged on a first side of the medium pipe along the flow direction of the cooling medium, and the n second electromagnet units are arranged on a second side of the medium pipe along the flow direction of the cooling medium; wherein the first side and the second side are two opposite sides of the medium pipe.

[0085] The thruster includes a first magnet, a second magnet, and a connecting plate. The first magnet is fixedly connected to the first end of the connecting plate, and the second magnet is fixedly connected to the second end of the connecting plate. The magnetic poles of the first magnet and the second magnet have the same direction.

[0086] The power supply provides power to the electromagnet, which, under the electromagnetic force generated by the electromagnet, propels the thruster to move within the medium pipeline. The thruster then propels the cooling medium to flow within the medium pipeline, including:

[0087] The power source supplies electrical energy to the n first electromagnet units in sequence according to their arrangement in the direction of the cooling medium flow, and the n first electromagnet units in sequence provide attractive forces to the first magnet in sequence according to their arrangement in the direction of the cooling medium flow; and the power source supplies electrical energy to the n second electromagnet units in sequence according to their arrangement in the direction of the cooling medium flow, and the n second electromagnet units in sequence provide attractive forces to the second magnet in sequence according to their arrangement in the direction of the cooling medium flow; where n is an integer greater than 1.

[0088] In some embodiments, the power source supplies electrical energy to the n first electromagnet units in sequence according to their arrangement in the direction of the cooling medium flow, and the n first electromagnet units in sequence provide attractive forces to the first magnet in the direction of the cooling medium flow, including: the (k+1)th first electromagnet unit is connected to the power source to provide an attractive force to the first magnet; at the same time, the kth first electromagnet unit is disconnected from the power source; where k is an integer between 0 and n-1.

[0089] In some embodiments, the power source sequentially supplies electrical energy to the n second electromagnet units according to their arrangement in the direction of the cooling medium flow, and the n second electromagnet units sequentially provide attractive forces to the second magnet according to their arrangement in the direction of the cooling medium flow, including:

[0090] The (k+1)th second electromagnet unit is connected to the power supply to provide an attractive force to the second magnet; at the same time, the kth second electromagnet unit is disconnected from the power supply; where k is an integer between 0 and n-1.

[0091] For example, taking a miniature heat dissipation device comprising eight first electromagnet units A1, A2...A8 and eight second electromagnet units B1, B2...B8 as an example, the control method of the miniature heat dissipation device is introduced.

[0092] Figure 8 This is a schematic diagram of the thruster in its natural state according to an embodiment of this disclosure. Figure 8 As shown, when the first electromagnet units A1, A2...A8 and the second electromagnet units B1, B2...B8 are not energized and the thruster 2 is in a natural state, neither the first magnet 21 nor the second magnet 22 receives electromagnetic force.

[0093] Figure 9 This is a schematic diagram of the thruster when the first electromagnet unit A1 and the second electromagnet unit B1 are energized in an embodiment of this disclosure. Figure 9 As shown, the first electromagnet unit A1 and the second electromagnet unit B1 are energized, and the first electromagnet unit A1 generates the S pole polarity, while the second electromagnet unit B1 generates the N pole polarity. Therefore, the first magnet 21 is attracted by the second electromagnet unit B1, thus adhering closely to the second side of the medium pipe 1; the second magnet 22 is attracted by the first electromagnet unit A1, thus adhering closely to the first side of the medium pipe 1. At this time, the thruster 2 covers the fluid cross section of the medium pipe 1.

[0094] Figure 10 This is a schematic diagram of the thruster in an embodiment of this disclosure when the first electromagnet unit A2 and the second electromagnet unit B2 are energized and the first electromagnet unit A1 and the second electromagnet unit B1 are de-energized. Figure 10As shown, when the first electromagnet unit A2 and the second electromagnet unit B2 are energized, and the first electromagnet unit A2 generates the S pole polarity while the second electromagnet unit B2 generates the N pole polarity, and when the first electromagnet unit A1 and the second electromagnet unit B1 are de-energized, the first electromagnet unit A2 and the second electromagnet unit B2 generate magnetic forces, and the magnetic forces of the first electromagnet unit A1 and the second electromagnet unit B1 disappear. Therefore, the first magnet 21 is attracted by the second electromagnet unit B2, adheres tightly to the second side of the medium pipe 1, and moves from the position of the second electromagnet unit B1 to the position of the second electromagnet unit B2. At the same time, the second magnet 22 is attracted by the first electromagnet unit A2, adheres tightly to the first side of the medium pipe 1, and moves from the position of the first electromagnet unit A1 to the position of the first electromagnet unit A2. That is, the propeller 2 moves a step distance from left to right. Since the propeller 2 covers the fluid cross-section of the medium pipe 1, it pushes the cooling medium to flow to the right. Here, the step distance is the distance between two adjacent first electromagnet units. It should be noted that the distance between two adjacent first electromagnet units is equal to the distance between two adjacent second electromagnet units.

[0095] The first electromagnet unit A3, ... A8, and the second electromagnet unit B3, ... B8 are energized and de-energized in sequence, and the thruster 2 reaches the termination position. Figure 11 This is a schematic diagram showing the thruster reaching the termination position in an embodiment of this disclosure. Figure 11 As shown, the first magnet 21 is attracted by the second electromagnet unit B8, and the second magnet 22 is attracted by the first electromagnet unit A8.

[0096] In some embodiments, the power source sequentially supplies electrical energy to the n second electromagnet units according to their arrangement in the cooling medium flow direction. The dislocation distance between the n first electromagnet units and the n second electromagnet units in the cooling medium flow direction is equal to the projected length of the thruster on the plane where the medium pipe is located. The dislocation distance between the n first electromagnet units and the n second electromagnet units in the cooling medium flow direction refers to the distance projected onto the plane where the medium pipe is located.

[0097] The n second electromagnet units are arranged in the order of the cooling medium flow direction to provide attractive forces to the second magnet in sequence, including: the (k+1)th second electromagnet unit is connected to the power supply to provide attractive forces to the second magnet; at the same time, the kth second electromagnet unit is disconnected from the power supply; where k is an integer between 0 and n-1.

[0098] For example, consider a miniature heat dissipation device comprising eight first electromagnet units A1, A2...A8 and eight second electromagnet units B1, B2...B8. The dislocation distance between the first electromagnet units A1, A2...A8 and the second electromagnet units B1, B2...B8 in the direction of the cooling medium flow is equal to the projected length of the thruster on the plane of the medium channel. For instance, the projected distance between the first electromagnet unit A1 and the second electromagnet unit B1 on the plane of the medium channel is equal to the projected length of the thruster on the plane of the medium channel; the projected distance between the first electromagnet unit A2 and the second electromagnet unit B2 on the plane of the medium channel is equal to the projected length of the thruster on the plane of the medium channel, and so on. Similarly, the projected distance between the first electromagnet unit A8 and the second electromagnet unit B8 on the plane of the medium channel is equal to the projected length of the thruster on the plane of the medium channel.

[0099] like Figure 9 As shown, the first electromagnet unit A1 and the second electromagnet unit B1 are energized, and the first electromagnet unit A1 generates the S pole polarity, while the second electromagnet unit B1 generates the N pole polarity. Therefore, the first magnet 21 is attracted by the second electromagnet unit B1, thus adhering closely to the second side of the medium pipe 1. Since the projected lengths of the first magnet 21 and the second magnet 22 on the plane of the medium pipe are equal to the projected lengths of the first electromagnet unit A1 and the second electromagnet unit B1 on the plane of the medium pipe, the second magnet 22 is attracted by the first electromagnet unit A1, thus adhering closely to the first side of the medium pipe 1. At this time, the thruster 2 covers the fluid cross-section of the medium pipe 1.

[0100] like Figure 10 As shown, when the first electromagnet unit A2 and the second electromagnet unit B2 are energized, and the first electromagnet unit A2 generates the S pole polarity while the second electromagnet unit B2 generates the N pole polarity, and when the first electromagnet unit A1 and the second electromagnet unit B1 are de-energized, the first electromagnet unit A2 and the second electromagnet unit B2 generate magnetic forces, and the magnetic forces of the first electromagnet unit A1 and the second electromagnet unit B1 disappear. Therefore, the first magnet 21 is attracted by the second electromagnet unit B2, adheres tightly to the second side of the medium pipe 1, and moves from the position of the second electromagnet unit B1 to the position of the second electromagnet unit B2. At the same time, the second magnet 22 is attracted by the first electromagnet unit A2, adheres tightly to the first side of the medium pipe 1, and moves from the position of the first electromagnet unit A1 to the position of the first electromagnet unit A2. That is, the propeller 2 moves a step distance from left to right. Since the propeller 2 covers the fluid cross-section of the medium pipe 1, it pushes the cooling medium to flow to the right. Here, the step distance is the distance between two adjacent first electromagnet units.

[0101] Table 1 shows the on / off logic relationship between the first electromagnet unit A1……A8 and the second electromagnet unit B1……B8 during the process of the thruster moving from the starting position to the ending position.

[0102] Table 1

[0103]

[0104] In some embodiments, the control method of the micro heat dissipation device further includes: a power source sequentially supplying electrical energy to n first electromagnet units in the order of their arrangement in the opposite direction of the cooling medium flow, and the n first electromagnet units sequentially providing repulsive force to a first magnet in the order of their arrangement in the opposite direction of the cooling medium flow; a power source sequentially supplying electrical energy to n second electromagnet units in the order of their arrangement in the opposite direction of the cooling medium flow, and the second electromagnet units sequentially providing attractive force to a second magnet in the order of their arrangement in the opposite direction of the cooling medium flow.

[0105] In some embodiments, the power source supplies electrical energy to the n first electromagnet units in the order of their arrangement in the opposite direction of the cooling medium flow, and the n first electromagnet units in the order of their arrangement in the opposite direction of the cooling medium flow sequentially provide repulsive force to the first magnet, including: the (m-1)th first electromagnet unit is connected to the power source to provide repulsive force to the first magnet; at the same time, the mth first electromagnet unit is disconnected from the power source; where m is an integer between 2 and n+1.

[0106] In some embodiments, the power source supplies electrical energy to the n second electromagnet units in the order of their arrangement in the opposite direction of the cooling medium flow, and the second electromagnet units in the order of their arrangement in the opposite direction of the cooling medium flow sequentially provide attractive forces to the second magnet, including: the (m-1)th second electromagnet unit is connected to the power source to provide an attractive force to the second magnet; at the same time, the mth second electromagnet unit is disconnected from the power source; where m is an integer between 2 and n+1.

[0107] For example, taking a miniature heat dissipation device comprising eight first electromagnet units A1, A2...A8 and eight second electromagnet units B1, B2...B8 as an example, the control method of the miniature heat dissipation device is introduced.

[0108] When the thruster returns from the terminated position to the starting position, the first electromagnet unit A8 is energized and generates a north pole. Therefore, the first electromagnet unit A8 generates a repulsive force on the second magnet 22, and the second magnet 22 no longer adheres to the first side of the medium pipe 1. Simultaneously, the second electromagnet unit B8 is energized and generates a north pole, and the second electromagnet unit B8 generates an attractive force on the first magnet 21. At this point, the thruster 2 no longer covers the fluid cross-section of the medium pipe 1. Figure 8As shown.

[0109] When the first electromagnet unit A7 is energized and generates an N pole, it exerts a repulsive force on the second magnet 22, causing the second magnet 22 to no longer adhere to the first side of the medium pipe 1. Simultaneously, the second electromagnet unit B7 is energized and generates an N pole, attracting the first magnet 21. At the same time, the second electromagnet unit B8 is de-energized. Under the electromagnetic force of the second electromagnet unit B7, the thruster 2 moves one step distance from right to left. Since the thruster 2 no longer covers the fluid cross-section of the medium pipe 1, it does not exert a driving force on the cooling medium; that is, when the thruster 2 moves from the termination position to the starting position, it does not cause the cooling medium to flow in the intended direction.

[0110] When the second electromagnet unit B1 is energized and generates an N pole, the second electromagnet unit B1 attracts the first magnet 21. At the same time, when the second electromagnet unit B2 is de-energized, the thruster 2 returns to the starting position.

[0111] In some embodiments, the power source sequentially supplies electrical energy to the n second electromagnet units according to their arrangement in the opposite direction of the cooling medium flow. The dislocation distance between the n first electromagnet units and the n second electromagnet units in the cooling medium flow direction is equal to the projected length of the thruster on the plane where the medium pipe is located. The dislocation distance between the n first electromagnet units and the n second electromagnet units in the cooling medium flow direction refers to the distance projected onto the plane where the medium pipe is located.

[0112] The second electromagnet units are arranged sequentially in the opposite direction of the cooling medium flow to provide attractive forces to the second magnet, including: the (m-1)th second electromagnet unit is connected to the power supply to provide attractive forces to the second magnet; at the same time, the mth second electromagnet unit is disconnected from the power supply; where m is an integer between 2 and n+1.

[0113] For example, taking a miniature heat dissipation device comprising eight first electromagnet units A1, A2...A8 and eight second electromagnet units B1, B2...B8 as an example, the dislocation distance between the first electromagnet units A1, A2...A8 and the second electromagnet units B1, B2...B8 in the direction of cooling medium flow is equal to the projected length of the thruster on the plane where the medium channel is located. For instance, the projected distance between the first electromagnet unit A1 and the second electromagnet unit B1 on the plane where the medium channel is located is equal to the projected length of the thruster on the plane where the medium channel is located; the projected distance between the first electromagnet unit A2 and the second electromagnet unit B2 on the plane where the medium channel is located is equal to the projected length of the thruster on the plane where the medium channel is located, and so on, the projected distance between the first electromagnet unit A8 and the second electromagnet unit B8 on the plane where the medium channel is located is equal to the projected length of the thruster on the plane where the medium channel is located.

[0114] When the thruster returns from the terminated position to the starting position, the first electromagnet unit A8 is energized and generates a north pole. Therefore, the first electromagnet unit A8 exerts a repulsive force on the second magnet 22, and the second magnet 22 no longer adheres to the first side of the medium pipe 1. Simultaneously, the second electromagnet unit B8 is energized and generates a north pole, and the second electromagnet unit B8 exerts an attractive force on the first magnet 21. At this point, the thruster 2 no longer covers the fluid cross-section of the medium pipe 1. Since the projected lengths of the first electromagnet unit A8 and the second electromagnet unit B8 on the plane of the medium pipe are equal to the projected distances of the first magnet 21 and the second magnet 22 on the same plane, when the first magnet 21 is attracted by the second electromagnet unit B8, the second magnet 22 will be repelled by the first electromagnet unit A8.

[0115] When the first electromagnet unit A7 is energized and generates an N pole, it exerts a repulsive force on the second magnet 22, causing the second magnet 22 to no longer adhere to the first side of the medium pipe 1. Simultaneously, the second electromagnet unit B7 is energized and generates an N pole, attracting the first magnet 21. At the same time, the second electromagnet unit B8 is de-energized. Under the electromagnetic force of the second electromagnet unit B7, the thruster 2 moves one step distance from right to left. Since the thruster 2 no longer covers the fluid cross-section of the medium pipe 1, it does not exert a driving force on the cooling medium; that is, when the thruster 2 moves from the termination position to the starting position, it does not cause the cooling medium to flow in the intended direction.

[0116] When the second electromagnet unit B1 is energized and generates an N pole, it attracts the first magnet 21. Simultaneously, when the second electromagnet unit B2 is de-energized, the thruster 2 returns to its initial position. Figure 12 As shown.

[0117] Table 2 shows the on / off logic relationship between the first electromagnet unit A1……A8 and the second electromagnet unit B1……B8 during the process of the thruster moving from the termination position to the starting position (reset).

[0118] Table 2

[0119]

[0120] The control method of the micro heat dissipation device in this embodiment of the present disclosure places the thruster inside the medium pipe and the electromagnet outside the medium pipe. The electromagnet converts the electrical energy provided by the power supply into electromagnetic force, thereby driving the thruster to move inside the medium pipe. Since the thruster is placed inside the medium pipe, the electromagnetic force provided by the electromagnet only needs to overcome the resistance of the cooling medium, and does not need to overcome the deformation resistance of the pipe, so as to drive the cooling medium to flow in the medium pipe. This can improve the power utilization rate and reduce power consumption. Moreover, the medium pipe will not be deformed by pressure, which can reduce the wear of the medium pipe and thus improve the service life of the medium pipe.

[0121] Thirdly, embodiments of this disclosure provide a terminal device, including a miniature heat dissipation device, which includes the miniature heat dissipation device provided in embodiments of this disclosure.

[0122] The terminal device provided in this embodiment of the disclosure utilizes the miniature heat dissipation device provided in this embodiment to dissipate heat from heat-generating components. An electromagnet is placed on the outside of the medium pipe. The electromagnet converts the electrical energy provided by the power supply into electromagnetic force, thereby driving the propeller to move within the medium pipe, and further driving the cooling medium to flow within the medium pipe. The electromagnetic force generated by the electromagnet can be completely transferred to the cooling medium, which can improve power utilization and reduce power consumption. Moreover, the medium pipe will not be deformed by pressure, which can reduce wear on the medium pipe and thus improve its service life.

[0123] This disclosure has disclosed exemplary embodiments, and although specific terminology has been used, it is for general illustrative purposes only and should not be construed as limiting. In some instances, it will be apparent to those skilled in the art that features, characteristics, and / or elements described in conjunction with particular embodiments may be used alone, or in combination with features, characteristics, and / or elements described in conjunction with other embodiments, unless otherwise expressly indicated. Therefore, those skilled in the art will understand that various changes in form and detail may be made without departing from the scope of this disclosure as set forth by the appended claims.

Claims

1. A micro heat dissipation device, comprising: a medium pipe, the medium pipe being a closed loop structure, and a cooling medium being arranged in the medium pipe; a propeller, arranged in the medium pipe, for propelling the cooling medium to flow; an electromagnet, arranged outside the medium pipe, for converting electric energy into a magnetic field for propelling the propeller to move; a power supply, electrically connected with the electromagnet, for providing electric energy to the electromagnet.

2. The micro heat spreader of claim 1, wherein, The electromagnet comprises: a plurality of first electromagnet units, arranged on a first side of the medium pipe along a flow direction of the cooling medium; a plurality of second electromagnet units, arranged on a second side of the medium pipe along the flow direction of the cooling medium; wherein the first side and the second side are two opposite sides of the medium pipe.

3. The micro heat spreader of claim 2, wherein, Further comprising: a control circuit, for controlling on-off of the power supply and the plurality of first electromagnet units and the plurality of second electromagnet units, and for controlling a magnetic field direction of the plurality of first electromagnet units and the plurality of second electromagnet units.

4. The micro heat spreader of claim 2 wherein, The medium pipe comprises a propelling area, and the plurality of first electromagnet units and the plurality of second electromagnet units are arranged in the propelling area; a shape of the medium pipe of the propelling area is a flat shape, and a length of the propeller is greater than a maximum diameter of the medium pipe.

5. The micro heat spreader of claim 4, wherein, a distance between the first side of the propelling area and the second electromagnet unit closest to the first side of the propelling area is less than or equal to the length of the propeller; a distance between the second side of the propelling area and the first electromagnet unit closest to the second side of the propelling area is less than or equal to the length of the propeller.

6. The micro heat spreader of claim 1 wherein, The propeller comprises: a first magnet; a second magnet; a connecting plate, the first magnet being fixedly connected with a first end of the connecting plate, and the second magnet being fixedly connected with a second end of the connecting plate, and a magnetic pole direction of the first magnet and the second magnet being the same.

7. The micro heat spreader of claim 6 wherein, The connecting plate is a flat plate; alternatively, the connecting plate is a curved plate, and a bending direction is from the second side of the medium pipe to the first side.

8. The micro heat spreader of claim 6 wherein, The propeller further comprises an auxiliary body, and a material of the auxiliary body is a non-magnetic material; The connecting plate comprises: a first connecting plate, the first magnet being fixedly connected with a first end of the first connecting plate, and the auxiliary body being fixedly connected with a second end of the first connecting plate; a second connecting plate, the auxiliary body being fixedly connected with a first end of the second connecting plate, and the second magnet being fixedly connected with a second end of the second connecting plate.

9. The micro heat spreader of claim 8 wherein, A plane where the first connecting plate is located and a plane where the second connecting plate is located are the same plane; alternatively, the plane where the first connecting plate is located and the plane where the second connecting plate is located are cross arranged, and the plane where the second connecting plate is located extends to a direction of the first side of the medium pipe.

10. The micro heat spreader of claim 1 wherein, Further comprising: a heat absorbing sheet, arranged in contact with the medium pipe, for transferring heat released by a heat generating component to the cooling medium in the medium pipe; a heat dissipation sheet, arranged in contact with the medium pipe, for releasing heat in the cooling medium.

11. A control method applied to a micro heat sink, wherein, The micro heat dissipation device comprises a medium pipeline, a propeller, an electromagnet and a power supply, a cooling medium flows in the medium pipeline, the propeller is arranged in the medium pipeline and used for pushing the cooling medium to flow; the electromagnet is arranged outside the medium pipeline and used for converting electric energy into a magnetic field for pushing the propeller to move; The power supply is electrically connected with the electromagnet to provide electric energy for the electromagnet; The control method comprises: the power supply supplies electric energy for the electromagnet, the electromagnet generates electromagnetic force to push the propeller to move in the medium pipeline, and the propeller pushes the cooling medium to flow in the medium pipeline.

12. The method of claim 11, wherein, The electromagnet comprises n first electromagnet units and n second electromagnet units, the n first electromagnet units are arranged on a first side of the medium pipeline along a flow direction of the cooling medium, and the n second electromagnet units are arranged on a second side of the medium pipeline along the flow direction of the cooling medium; wherein the first side and the second side are two opposite sides of the medium pipeline; The propeller comprises a first magnet, a second magnet and a connecting plate, the first magnet is fixedly connected with a first end of the connecting plate, the second magnet is fixedly connected with a second end of the connecting plate, and the first magnet and the second magnet have the same magnetic pole direction; The power supply supplies electric energy for the electromagnet, the electromagnet generates electromagnetic force to push the propeller to move in the medium pipeline, and the propeller pushes the cooling medium to flow in the medium pipeline, comprising: The power supply sequentially provides electric energy for the n first electromagnet units according to the arrangement order of the n first electromagnet units along the flow direction of the cooling medium, and the n first electromagnet units sequentially provide attractive force for the first magnet according to the arrangement order along the flow direction of the cooling medium; The power supply sequentially provides electric energy for the n second electromagnet units according to the arrangement order of the n second electromagnet units along the flow direction of the cooling medium, and the n second electromagnet units sequentially provide attractive force for the second magnet according to the arrangement order along the flow direction of the cooling medium; wherein n is an integer greater than 1.

13. The method of claim 11, wherein, The power supply sequentially provides electric energy for the n first electromagnet units according to the arrangement order of the n first electromagnet units along the flow direction of the cooling medium, and the n first electromagnet units sequentially provide attractive force for the first magnet according to the arrangement order along the flow direction of the cooling medium, comprising: The k+1 first electromagnet unit is connected with the power supply to provide attractive force for the first magnet, and meanwhile, the k first electromagnet unit is disconnected with the power supply; The power supply sequentially provides electric energy for the n second electromagnet units according to the arrangement order of the n second electromagnet units along the flow direction of the cooling medium, and the n second electromagnet units sequentially provide attractive force for the second magnet according to the arrangement order along the flow direction of the cooling medium, comprising: The k+1th second electromagnet unit is connected to the power supply to provide an attractive force to the second magnet; meanwhile, the kth second electromagnet unit is disconnected from the power supply; wherein k is an integer between 0 and n-1.

14. The method of claim 11, wherein, Further comprising: The power supply provides electric energy to the n first electromagnet units in sequence according to the arrangement order of the n first electromagnet units in the reverse direction of the cooling medium flow, and the n first electromagnet units provide repulsive forces to the first magnet in sequence according to the arrangement order of the n first electromagnet units in the reverse direction of the cooling medium flow. The power supply provides electric energy to the n second electromagnet units in sequence according to the arrangement order of the n second electromagnet units in the reverse direction of the cooling medium flow, and the n second electromagnet units provide attractive forces to the second magnet in sequence according to the arrangement order of the n second electromagnet units in the reverse direction of the cooling medium flow.

15. The method of claim 11, wherein, The power supply provides electric energy to the n first electromagnet units in sequence according to the arrangement order of the n first electromagnet units in the reverse direction of the cooling medium flow, and the n first electromagnet units provide repulsive forces to the first magnet in sequence according to the arrangement order of the n first electromagnet units in the reverse direction of the cooling medium flow, comprising: The m-1th first electromagnet unit is connected to the power supply to provide a repulsive force to the first magnet; meanwhile, the mth first electromagnet unit is disconnected from the power supply; The power supply provides electric energy to the n second electromagnet units in sequence according to the arrangement order of the n second electromagnet units in the reverse direction of the cooling medium flow, and the n second electromagnet units provide attractive forces to the second magnet in sequence according to the arrangement order of the n second electromagnet units in the reverse direction of the cooling medium flow, comprising: The m-1th second electromagnet unit is connected to the power supply to provide an attractive force to the second magnet; meanwhile, the mth second electromagnet unit is disconnected from the power supply; wherein m is an integer between 2 and n+1.

16. A terminal device comprising a micro heat dissipation device, the micro heat dissipation device comprising the micro heat dissipation device of any one of claims 1-10.

Images