Heat transfer device and wireless charging device using the same

Abstract

A heat transfer device includes a first housing, a support frame, a support body, a plurality of magnetically conductive elements, and a coil. The first housing has an inner surface, a flow channel, and a cover plate. The flow channel is located on the inner surface of the first housing, and the cover plate covers the inner surface of the first housing to seal coolant within the flow channel, wherein the coolant flows in one direction. The support body and the support frame are interlocked and mounted on the first housing. The magnetically conductive elements are disposed between the support frame and the support body, and are arranged adjacent to each other. The coil is wound around the support body, and the coil and the magnetically conductive elements are located on opposite sides of the support body.

Description

Technical Field

[0001] This invention relates to a power transmission system, and more particularly to a heat conduction device and a wireless charging device using the same. Prior Technology

[0002] The wireless charging device achieves charging via inductive means, where a main coil is located in the charger base of the transmitter assembly, and a secondary coil is located in the device to be charged in the receiver assembly. When power is applied to the charger base, current flows through the main coil, generating magnetic flux. When the secondary coil of the device to be charged approaches the main coil, the magnetic flux couples to the secondary coil, thereby inducing a current in the secondary coil. The induced current in the secondary coil can be used to charge the battery of the device to be charged.

[0003] However, currently, both the main coil at the transmitter and the secondary coil at the receiver must conduct heat to the outside through the casing to reduce the temperature inside the casing. However, actual measurements show that the heat inside the casing is too concentrated and cannot be evenly conducted or dissipated, resulting in poor heat dissipation efficiency of the wireless charging device. Summary of the Invention

[0004] This invention relates to a heat conduction device and a wireless charging device using the same, for improving heat dissipation efficiency.

[0005] According to one aspect of the present invention, a heat conduction device is provided, comprising a first housing, a support frame, a support body, a plurality of magnetically conductive elements, and a coil. The first housing includes an inner surface, a flow channel, and a cover plate. The flow channel is located on the inner surface of the first housing, and the cover plate covers the inner surface of the first housing to seal coolant in the flow channel. The coolant absorbs heat energy in the flow channel and moves from a heat-absorbing area of ​​the first housing to a surrounding heat-releasing area. The flow channel includes a plurality of one-way valves for controlling the flow direction of the coolant. The support body and the support frame are interlocked and mounted on the first housing. The magnetically conductive elements are disposed between the support frame and the support body, arranged adjacent to each other. The coil is wound on the support body, and the coil and the magnetically conductive elements are located on opposite sides of the support body.

[0006] According to one aspect of the present invention, a wireless charging device is provided, comprising a power cord and a transformer. The power cord provides a power input. The transformer is connected to the power cord to transmit power. The transformer includes a heat conduction device comprising a first housing, a support frame, a support body, a plurality of magnetically conductive elements, and a coil. The first housing includes an inner surface, a flow channel, and a cover plate. The flow channel is located on the inner surface of the first housing, and the cover plate covers the inner surface of the first housing to seal coolant in the flow channel. The coolant absorbs heat energy in the flow channel and moves from a heat-absorbing area of ​​the first housing to a surrounding heat-releasing area. The flow channel includes a plurality of one-way valves for controlling the flow direction of the coolant. The support body and the support frame are interlocked and disposed on the first housing. The magnetically conductive elements are disposed between the support frame and the support body, and are arranged adjacent to each other. The coil is wound on the support body, and the coil and the magnetically conductive elements are respectively located on opposite sides of the support body.

[0007] To provide a better understanding of the above and other aspects of the present invention, specific embodiments are described below in conjunction with the accompanying drawings: Simple Explanation of the Diagram

[0008] Figure 1 illustrates a circuit diagram of a wireless charging device according to an embodiment of the present invention. Figure 2A shows a perspective view of a transformer according to an embodiment of the present invention. Figures 2B and 2C respectively illustrate the exploded view of the transformer in Figure 2A from different perspectives. Figure 3 shows a top view of a support frame and a support body interlocked and disposed on a first housing according to an embodiment of the present invention. Figure 4 shows a cross-sectional view of a transformer at the snap-fit ​​location according to an embodiment of the present invention. Figure 5 shows a cross-sectional view of a transformer at the screw fastening point according to an embodiment of the present invention. Figure 6 shows an exploded schematic diagram of the lower housing according to an embodiment of the present invention. Figure 7 shows a schematic diagram of the coolant circulating in the guide channel of the lower casing. Figure 8 shows a schematic diagram of the operation of a one-way valve. Implementation

[0009] Please refer to Figure 1, which illustrates a circuit diagram of a wireless charging device 100. The wireless charging device 100 includes a transmitter assembly 110 and a receiver assembly 120. The transmitter assembly 110 includes a first power line 111 and a first transformer 112. The receiver assembly 120 includes a second power line 121 and a second transformer 122. The transmitter assembly 110 is connected to a power source 130 via the first power line 111, while the receiver assembly 120 is connected to a load 140 (e.g., the battery of the device to be charged) via the second power line 121. When the power source 130 applies power to the transmitter assembly 110, current flows through the main coil 113 of the first transformer 112, generating magnetic flux. When the secondary coil 123 of the second transformer 122 approaches the main coil 113, the magnetic flux couples to the secondary coil 123, thereby inducing a current in the secondary coil 123. Therefore, the induced current generated in the secondary coil 123 can charge the battery of the device to be charged. In other words, the wireless charging device 100 can achieve wireless transmission of electrical signals through near-field magnetic coupling.

[0010] The power source 130 may include a power module 131 and a control circuit 132, the control circuit 132 being used to control the voltage and current output by the power module 131. A first power line 111 is electrically connected to the power source 130 to provide a power input. A first transformer 112 is connected to the first power line 111, and the first transformer 112 can transmit power to the second transformer 122 of the receiver assembly 120 via near-field magnetic coupling. The internal structure of the transformers will be described below. Since the internal structures of the first transformer 112 and the second transformer 122 are similar, the following content is not limited to the first transformer 112 or the second transformer 122.

[0011] Please refer to Figures 2A to 5, where Figure 2A shows a perspective view of a transformer 200 according to an embodiment of the present invention; Figures 2B and 2C show exploded views of the transformer 200 according to an embodiment of the present invention from different perspectives; Figure 3 shows a top view of a support frame 240 and a support body 210 interlocked and disposed on a first housing 250 according to an embodiment of the present invention; Figure 4 shows a cross-sectional view of the transformer at the snap-fit ​​location according to an embodiment of the present invention; and Figure 5 shows a cross-sectional view of the transformer at the screw fastening location according to an embodiment of the present invention. The transformer 200 can be either the first transformer 112 or the second transformer 122 described above. The transformer 200 can be disposed in a ground / wall assembly and / or a vehicle assembly. The ground / wall assembly has a transmitter assembly, and the vehicle assembly has a receiver assembly. The ground / wall assembly and the vehicle assembly can be wirelessly charged via near-field magnetic coupling. The vehicle assembly may include an Automated Guided Vehicle or an Autonomous Mobile Robot, etc.

[0012] In one embodiment, the transformer 200 includes a heat conduction device comprising an upper housing 202, a support body 210, a plurality of magnetically conductive elements 220, a coil 230, a support frame 240, and a lower housing 250. In this embodiment, the lower housing 250 is a first housing, and the upper housing 202 is a second housing. The upper housing 202 may be a plastic housing, while the lower housing 250 may be a metal housing. The upper housing 202 and the lower housing 250 are disposed opposite to each other to house the support body 210, the magnetically conductive elements 220, the coil 230, and the support frame 240. The support body 210 may be a winding frame, with a winding slot 211 on one side for accommodating the coil 230. As shown in Figure 2B, the support body 210 has a first side 210a, a second side 210b, and at least one through hole 210c passing through both the first side 210a and the second side 210b. However, the through hole 210c may be omitted or replaced by other structural forms. Magnetic conductive elements 220 are disposed on the first side 210a of the support body 210, that is, between the support body 210 and the support frame 240, and these magnetic conductive elements 220 are arranged adjacent to each other. In addition, a coil 230 is wound on the second side 210b of the support body 210, that is, wound in the winding groove 211, and the internal winding of the coil 230 includes a through wire 232 entering the first side 210a of the support body 210 through the through hole 210c, as shown in Figures 2B, 2C, and 3.

[0013] The magnetic elements 220 are, for example, iron cores, which may be made of ferrite cores. These magnetic elements 220 are arranged, for example, in a grid pattern or other shapes, with each magnetic element 220 adjacent to each other, and the size of the magnetic elements 220 is adjustable. For example, to allow the thread 232 to pass through the through-hole 210c into the first side 210a of the support body 210, at least one of the magnetic elements 220 221 forms a notch 222 at the position corresponding to the through-hole 210c, the notch 222 for the thread 232 to pass through. Therefore, the thread 232 can pass downwards at an angle through the notch 222 of the magnetic element 220 and enter the region located below the notch 222.

[0014] In one embodiment, the guide wire 232 can be formed of stranded wire or flexible flat wire. The number of strands and wire diameter of the guide wire 232 can be selected appropriately according to the current requirements, and the stranded wire has high compliance when passing through the notch 222, thereby reducing losses and mechanical stress. Furthermore, the stranded wire can effectively reduce skin effect and proximity effect losses at high frequencies, making it suitable for the operating frequency of wireless charging. In addition, the placement of a small-sized magnetic conductive element 221 around the guide wire 232 can prevent magnetic flux leakage and maintain magnetic field concentration, thus avoiding magnetic flux divergence caused by an excessively large notch 222.

[0015] Referring to Figures 2B, 2C, and 3, the transformer 200 may include a terminal fixing bracket 242, which is disposed on one side of the support frame 240 to fix a terminal 232a of the wire 232. Therefore, the terminal 232a of the wire 232 can be fixed to one side of the support frame 240 through the terminal fixing bracket 242 to serve as a power input or output terminal.

[0016] Furthermore, the thread 232 is extendably disposed within an elongated slot 244 of the support frame 240, such that the thread 232 extends substantially horizontally. Additionally, the lower housing 250 is disposed on the bottom surface of the support frame 240, meaning the support frame 240 is positioned between the lower housing 250 and the magnetically conductive element 220. The outer surface of the lower housing 250 has multiple heat dissipation fins 252 to improve the heat dissipation efficiency of the transformer 200. Furthermore, the inner surface of the lower housing 250 has a deep groove 253a, the position and extension direction of which correspond to the elongated slot 244, allowing the thread 232 extending below the support frame 240 to be fixed to the outlet end fixing bracket 242 via the deep groove 253a.

[0017] Referring to Figures 2B, 4, and 5, the peripheral surface of the upper housing 202 is provided with a plurality of through holes 203, while the peripheral surface of the lower housing 250 is provided with a plurality of screw holes 255 corresponding to the through holes 203. A plurality of fasteners 204 (e.g., screws) can individually pass through the corresponding through holes 203 and be locked in the corresponding screw holes 255 to combine the upper housing 202 and the lower housing 250. Furthermore, the inner surface 253 of the lower housing 250 also has another deep receiving groove 253b for accommodating the cable outlet fixing bracket 242, so that the cable outlet fixing bracket 242 can be enclosed between the upper housing 202 and the lower housing 250. Additionally, referring to Figures 2B and 3, the peripheral surface of the support body 210 is provided with a plurality of through holes 213, while the inner surface 253 of the lower housing 250 near the inner sidewall 251 is provided with a plurality of screw holes 256 corresponding to the through holes 213. Multiple fasteners 214 (e.g. screws) can individually pass through corresponding through holes 213 and be locked in corresponding screw holes 256 to engage the support body 210 with the lower housing 250.

[0018] Referring to Figures 3 and 4, in one embodiment, when the support body 210 is fixed to the lower housing 250 by the fastener 214, in order to improve waterproofing, the inner wall 251 and the outer ring surface 254 of the lower housing 250 can be isolated by a partition ring 257. That is, the partition ring 257 is located outside the inner wall 251, preventing moisture from seeping into the interior of the lower housing 250 through the outer ring surface 254. In addition, the upper housing 202 may be provided with a protruding rib 205 relative to the partition ring 257 of the lower housing 250. The protruding rib extends downward from the inner surface of the upper housing 202 to the partition ring 257 of the lower housing 250, and may not abut against the bottom surface of the partition ring 257 or may abut directly against the bottom surface of the partition ring 257. Because the rib 205 is a closed ring structure, it forms a closed water-blocking structure with the partition ring 257 of the lower housing 250, similar to a waterproof ring, preventing water vapor from seeping into the interior of the lower housing 250 through the outer ring surface 254. In addition, the interior of the partition ring 257 of the lower housing 250 can also be filled with sealing material (not shown in the figure), such as glue or polymer, to further enhance the overall waterproof performance of the transformer 200.

[0019] Referring to Figures 2B, 2C, and 4, a plurality of hooks 215 are provided around the support body 210 for engaging the support frame 240, and a plurality of locking holes (not shown) are provided around the support frame 240 corresponding to the hooks 215, so that the support body 210 and the support frame 240 can be combined. The positions of the hooks 215 and the locking holes are interchangeable, and their structure is not limited to that shown in this figure. As shown in Figure 6, the rod 215a of the hook 215 extends downward from the side of the support body 210 to the side of the support frame 240, and the hook portion 215b of the hook 215 extends from the end of the rod 215a into the interior of the support frame 240 and is embedded in the locking hole, so that the hook 215 and the locking hole are engaged. In addition, the support body 210 and the support frame 240 can also be aligned with each other through positioning members 246 provided around the support frame 240. Then, the assembled support body 210 and support frame 240 are fixed onto the lower housing 250.

[0020] In one embodiment, to improve the heat dissipation efficiency of the transformer 200, before fixing the assembled support body 210 and support frame 240 onto the lower housing 250, a thermally conductive medium 248 can be applied or filled onto the inner surface 253. The thermally conductive medium 248 is, for example, a thermal interface material (TIM) to reduce the contact thermal resistance between the support frame 240 and the lower housing 250. Common types of thermally conductive medium 248 include epoxy resin, silicone, and polyurethane, used to reduce the contact thermal resistance between the support frame 240 and the lower housing 250, thereby improving heat dissipation efficiency.

[0021] Furthermore, referring to Figures 2B and 2C, to improve the heat dissipation efficiency of the transformer 200, a thermally conductive medium 249 may be applied or filled between the magnetic element 220 and the support body 210 before assembling the support body 210 and the support frame 240. The thermally conductive medium 249 is, for example, a thermal interface material (TIM) to reduce the contact thermal resistance between the support body 210 and the magnetic element 220. Common types of thermally conductive medium 249 include epoxy resin, silicone, and polyurethane, used to reduce the contact thermal resistance between the support body 210 and the magnetic element 220, thereby improving heat dissipation efficiency.

[0022] Please refer to Figures 6 to 8. Figure 6 shows an exploded view of the heat conduction structure of the lower housing 250 according to an embodiment of the present invention. Figure 7 shows a schematic diagram of the circulation of coolant 260 in the guide channel 258 of the lower housing 250. Figure 8 shows an operational schematic diagram of the one-way valve 258a. The heat conduction structure of the lower housing 250 includes an inner surface 253, a guide channel 258, and a cover plate 259. The guide channel 258 is located on the inner surface 253 of the lower housing 250, and the cover plate 259 covers the inner surface 253 of the lower housing 250 to seal the coolant 260 in the guide channel 258. The coolant can circulate in the lower housing 250 made of metal materials such as copper or aluminum. The cover plate 259, such as a metal heat sink, can conduct the absorbed heat energy to the coolant 260. The coolant 260 absorbs heat energy in the guide channel 258 and moves from a heat absorption area 250a of the lower housing 250 to at least one heat dissipation area 250b around it, so that the heat energy inside the lower housing 250 is not too concentrated and the heat energy is evenly conducted or dissipated. The number of heat dissipation areas 250b can be two or more.

[0023] Referring to Figures 2C and 6, the lower housing 250 also includes a water inlet 261 and a water outlet 262. The water inlet 261 and water outlet 262 can extend from the outer surface of the lower housing 250 to the inner surface 253, respectively. Coolant can be injected into the guide channel 258 through the water inlet 261 or discharged through the water outlet 262. After the coolant is injected into the lower housing 250, the water inlet 261 and water outlet 262 are sealed with sealant or a gasket. The water inlet 261 and water outlet 262 can be located on the same side of the lower housing 250, or on opposite sides of the lower housing 250; this invention does not impose any limitation on this.

[0024] Referring to Figure 7, the heat-absorbing zone 250a is distributed around the deep groove 253a of the lower housing 250. The deep groove 253a of the lower housing 250 corresponds to the elongated slot 244, allowing the wire 232 to extend from the elongated slot 244 of the support frame 240 to the deep groove 253a below the support frame 240. Since the heat generated by the wire 232 through the magnetic element 221 is concentrated in this area and forms a heat source, it is called the heat-absorbing zone 250a. The temperature of the heat-absorbing zone 250a is the highest, while the area outside the heat-absorbing zone 250a can be called the heat-releasing zone 250b, and the temperature of the heat-releasing zone 250b is lower than that of the heat-absorbing zone 250a.

[0025] According to the principle of heat transfer, the coolant 260 can move from the high-temperature heat-absorbing zone 250a to the low-temperature heat-releasing zone 250b until the temperature tends to be uniform or close. Referring to Figure 7, in one embodiment, the transformer 200 is placed upright on a ground / wall assembly or vehicle assembly, and heat energy can be transferred through the flow of the coolant 260. When the coolant 260 is heated, its density decreases, and the coolant 260 with a higher temperature can rise through the guide channel 258 and flow from the heat-absorbing zone 250a to the heat-releasing zone 250b; when the coolant 260 releases heat, its density increases, and the coolant 260 with a lower temperature can descend through the guide channel 258 and flow from the heat-releasing zone 250b to the heat-absorbing zone 250a, thus forming an internal circulation. Therefore, in this embodiment, the principle of "capillary effect" is used. After the liquid coolant 260 absorbs heat energy, it evaporates into vapor in the heat absorption zone 250a and disperses into the lower-temperature heat release zone 250b. Then, the vapor condenses and releases heat into liquid in the heat release zone 250b and re-enters the heat absorption zone 250a for the next cycle.

[0026] In one embodiment, a plurality of one-way valves 258a are provided in the heat absorption zone 250a of the lower housing 250 to control the flow direction of the coolant 260. As shown in Figures 7 and 8, the one-way valves 258a can be Tesla valves. A Tesla valve is a passive check valve with a fixed geometry that does not resist fluid flow in one direction but resists fluid flow in the opposite direction. This difference in flow resistance prevents reverse flow of the fluid, ensuring that the fluid can only flow in one direction. Therefore, in this embodiment, placing a plurality of Tesla valves in the heat absorption zone 250a increases the heat absorption area of ​​the coolant 260, thereby improving the heat absorption effect. In addition, the Tesla valves are placed in the same direction as the direction of gravity (i.e., the upright configuration direction), which further ensures the unidirectional flow of the fluid.

[0027] As shown in Figure 7, the coolant 260 can only move upwards in the heat absorption zone 250a. Then, the coolant 260 moves from the heat absorption zone 250a to the guide channels 258 on both sides. Next, the coolant 260 can only move downwards in the heat dissipation zone 250b, and then returns to the heat absorption zone 250a through the lower guide channel 258. The heat dissipation zone 250b may include guide channels 258 composed of a plurality of flow channels 258b, which can be straight or curved to increase the heat dissipation area. Since Tesla valves can be installed in tiny tanks, and their number is unlimited, they have advantages such as small size, space-saving design, and high fluid velocity, making them suitable for use in transformers 200 and wireless charging devices 100 that require rapid heat dissipation and small size.

[0028] In summary, although the present invention has been disclosed above with reference to embodiments, it is not intended to limit the invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

[0029] 100: Wireless charging device 110: Transmitter assembly 111: First power line 112: First Transformer 113: Main coil 120: Receiver assembly 121: Second power line 122: Second Transformer 123: Secondary coil 130: Power source 131: Power Module 132: Control Circuit 140: Load 200: Transformer 202: Upper shell 203: Through-hole 204: Locking hardware 205: Convex Rib 210: Support body 210a: First side 210b: Second side 210c: Perforation 211: Winding slot 213: Through-hole 214: Locking Firmware 215: Hook 215a: Rod 215b: Hook radical 220, 221: Magnetic elements 220a: Top surface 220b: Bottom surface 222: Gap 230: Coil 232: Threading 232a: Outgoing cable terminal 240: Support frame 242: Outgoing cable end fixing bracket 244: Long slotted section 246: Positioning component 248, 249: Thermal conductive medium 250: Lower housing 250a: Heat absorption zone 250b: Exothermic zone 251: Inner wall 252: Heat dissipation fins 253: Inner surface 253a: Deep trench 253b: Deep accommodating groove 254: Outer ring surface 255: Screw hole 256: Screw hole 257: Separator ring 258: Flow guide channel 258a: Check valve 258b: Flow channel 259: Cover plate 260: Coolant 261:Water entry hole 262: Water outlet

Claims

1. A heat transfer device, comprising: A first housing having an inner surface, a flow channel, and a cover plate, the flow channel being located on the inner surface of the first housing, the cover plate covering the inner surface of the first housing to seal a coolant in the flow channel, the flow channel including a plurality of Tesla valves for controlling the flow direction of the coolant, wherein the first housing includes a heat-absorbing zone and a heat-releasing zone, the flow channel communicating between the heat-absorbing zone and the heat-releasing zone, the coolant absorbing a heat source in the heat-absorbing zone and moving from the heat-absorbing zone to the heat-releasing zone; a support frame; a support body, which is interlocked with the support frame and disposed on the first housing; a plurality of magnetically conductive elements disposed between the support frame and the support body, the magnetically conductive elements being arranged adjacent to each other; and a coil wound on one side of the support body, the coil and the magnetically conductive elements being respectively located on opposite sides of the support body.

2. The heat transfer device as claimed in claim 1, wherein the coolant flows unidirectionally in the guide channel, the guide channel forming an internal circulation, and the Tesla valves are disposed adjacent to the heat source.

3. The heat transfer device as claimed in claim 2, wherein the first housing is placed upright, the coolant moves from bottom to top in the heat absorption zone, then moves from above the heat absorption zone to the guide channels on both sides, the coolant moves from top to bottom in the heat release zone, then moves from below the heat release zone to the guide channels and returns to the heat absorption zone.

4. The heat conduction device as claimed in claim 1, wherein the support body includes a through hole and the coil includes a wire passing through the through hole into one side of the support body relative to the support frame.

5. The heat conduction device as claimed in claim 4, wherein at least one of the magnetic elements has a notch formed at the location corresponding to the perforation.

6. The heat conduction device as claimed in claim 5, wherein the wire passes through the magnetically conductive elements and forms the heat source at the notch, and the flow channel forms a plurality of flow channels in the heat dissipation zone.

7. The heat conduction device as described in claim 4 further includes a wire outlet fixing bracket disposed on one side of the support frame, wherein one end of the wire passes through the through hole and is fixed to the wire outlet fixing bracket.

8. The heat conduction device as claimed in claim 1, wherein the support body is a winding frame with a winding groove on one side for accommodating the coil.

9. The heat conduction device as claimed in claim 1 further includes a second housing disposed opposite to the first housing, the first housing having a partition ring, and the second housing having a rib extending from the second housing to the partition ring relative to the partition ring, the rib being a closed annular structure.

10. The heat conduction device as claimed in claim 1, wherein a plurality of hooks for engaging the support frame are provided around the support body, and a plurality of locking holes are provided around the support frame corresponding to the hooks.

11. The heat transfer device as claimed in claim 1, wherein the first housing further includes a water inlet and a water outlet, the water inlet being for filling the coolant and the water outlet being for discharging the coolant.

12. A wireless charging device, comprising: A power cord, used to provide a power input; The device includes a transformer connected to the power line to transmit power. The transformer includes a heat conduction device comprising: a first housing having an inner surface, a flow channel, and a cover plate. The flow channel is located on the inner surface of the first housing, and the cover plate covers the inner surface of the first housing to seal a coolant in the flow channel. The flow channel includes a plurality of Tesla valves for controlling the flow direction of the coolant. The first housing includes a heat absorption zone and a heat release zone. The flow channel communicates between the heat absorption zone and the heat release zone. The coolant absorbs a heat source in the heat absorption zone and moves from the heat absorption zone to the heat release zone. The device also includes a support frame; a support body that is interlocked with the support frame and mounted on the first housing; a plurality of magnetically conductive elements disposed between the support frame and the support body, arranged adjacent to each other; and a coil wound on one side of the support body, the coil and the magnetically conductive elements being located on opposite sides of the support body.

13. The wireless charging device as claimed in claim 12, wherein the coolant flows unidirectionally in the channel, the channel forming an internal circulation, and the Tesla valves are disposed adjacent to the heat source.

14. The wireless charging device as claimed in claim 13, wherein the first housing is placed upright, the coolant moves from bottom to top in the heat absorption zone, then moves from above the heat absorption zone to the guide channels on both sides, the coolant moves from top to bottom in the heat release zone, then moves from below the heat release zone to the guide channels and back to the heat absorption zone.

15. The wireless charging device as claimed in claim 12, wherein the support body includes a through hole and the coil includes a wire passing through the through hole into one side of the support body relative to the support frame.

16. The wireless charging device as claimed in claim 15, wherein at least one of the magnetic elements forms a notch at the location corresponding to the through hole.

17. The wireless charging device as claimed in claim 16, wherein the wire passes through the magnetic elements and forms the heat source at the notch, and the flow channel forms a plurality of flow channels in the heat dissipation zone.

18. The wireless charging device as claimed in claim 15 further includes a cable outlet bracket disposed on one side of the support frame, wherein one end of the cable passes through the through hole and is fixed to the cable outlet bracket.

19. The wireless charging device as claimed in claim 12, wherein the support body is a winding frame with a winding groove on one side for accommodating the coil.

20. The wireless charging device as claimed in claim 12, wherein the heat conduction device further includes a second housing disposed opposite to the first housing, the first housing having a partition ring, and the second housing having a rib extending from the second housing to the partition ring relative to the partition ring, the rib being a closed ring structure.

21. The wireless charging device as claimed in claim 12, wherein a plurality of hooks for engaging the support frame are provided around the support body, and a plurality of slots are provided around the support frame corresponding to the hooks.

22. The wireless charging device as claimed in claim 12, wherein the first housing further includes a water inlet and a water outlet, the water inlet being for filling the coolant and the water outlet being for discharging the coolant.

Images