CN111613422A - wireless charging stand - Google Patents

Abstract

The embodiment of the disclosure provides a wireless charging seat, which comprises a shell, a coil and a heat dissipation assembly. The heat dissipation assembly is provided with a first heat exchanger, a second heat exchanger, a connecting pipe and a driving assembly, wherein a first passage is arranged in the first heat exchanger, a second passage is arranged in the second heat exchanger, the connecting pipe is communicated with the first passage and the second passage to form a closed circulation channel, the driving assembly is connected into the circulation channel, and the first heat exchanger is adjacent to the first surface; the coil is disposed on a first side of the first heat exchanger, the first side facing away from the first surface. The wireless charging seat of the embodiment of the present disclosure improves the heat dissipation efficiency of the wireless charging seat by forming a stable circulating heat exchange medium in the casing, and ensures the safety of the electronic device.

Description

wireless charging stand

technical field

The present disclosure relates to the technical field of wireless devices, and in particular, the present disclosure relates to a wireless charging stand.

Background technique

The wireless charging technology makes the charger get rid of the limitation of the charging cable, realizes the complete separation of the mobile phone and the power supply, and greatly improves the safety and flexibility.

However, in the process of wireless charging, with the increase of fast charging power, the heat generated by the coil of the charging base increases greatly, and the heat generated by the charging base cannot be dissipated in time, which not only increases the safety risk of the charging base itself, but also reduces the power of wireless charging. .

SUMMARY OF THE INVENTION

Embodiments of the present disclosure provide a wireless charging stand to solve the problem of low heat dissipation efficiency of a traditional wireless charging stand.

In order to solve the above problems, the embodiments of the present disclosure adopt the following technical solutions:

An embodiment of the present disclosure provides a wireless charging stand for charging an electronic device, the wireless charging stand has a coil, and the coil is used for charging the electronic device, and the wireless charging stand includes:

The housing has a mounting cavity in the housing, and the housing has a first surface for facing the electronic device;

A heat dissipation assembly, the heat dissipation assembly is installed in the installation cavity, the heat dissipation assembly has a first heat exchanger, a second heat exchanger, a connecting pipe and a driving assembly, and the first heat exchanger is provided with a first heat exchanger a passage, the second heat exchanger is provided with a second passage, the connecting pipe connects the first passage and the second passage to form a closed circulation passage, and the circulation passage is filled with a heat exchange medium, The drive assembly is connected into the circulation channel, the drive assembly is used for driving the heat exchange medium to flow, the first heat exchanger is adjacent to the first surface, and the first heat exchanger is used for the first surface dissipates heat;

The coil is disposed on a first side of the first heat exchanger, the first side facing away from the first surface.

The technical solutions adopted in the embodiments of the present disclosure can achieve the following beneficial effects:

Embodiments of the present disclosure provide a wireless charging stand, including a housing, a coil, and a heat dissipation assembly. In the embodiment of the present disclosure, the first passage in the first heat exchanger of the wireless charging stand and the second passage in the second heat exchanger are communicated through the connecting pipe to form a circulation channel, and the wireless charging coil is adjacent to the first heat exchanger, The flow of the low-temperature circulating heat exchange medium in the first heat exchanger can take away the heat generated in the coil charging process, improve the heat dissipation efficiency of the wireless charging stand, and ensure long-term stable operation of the wireless charging stand.

Description of drawings

The accompanying drawings described herein are used to provide further understanding of the present disclosure and constitute a part of the present disclosure. The exemplary embodiments of the present disclosure and their descriptions are used to explain the present disclosure and do not constitute an improper limitation of the present disclosure. In the attached image:

FIG. 1 is a schematic cross-sectional view of a wireless charging stand according to an embodiment of the present disclosure;

FIG. 2 is a schematic cross-sectional view of A-A in FIG. 1 according to an embodiment of the present disclosure;

3 is a schematic structural diagram of a first heat exchanger of a wireless charging stand according to an embodiment of the present disclosure;

4 is a schematic structural diagram of a second heat exchanger of a wireless charging stand according to an embodiment of the present disclosure;

5 is a schematic diagram of a specific structure of a first heat exchanger of a wireless charging stand according to an embodiment of the present disclosure;

6 is a schematic structural diagram of a first heat exchanger of another wireless charging stand provided by an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a second heat exchanger of another wireless charging stand according to an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a specific structure of a first heat exchanger of another wireless charging stand according to an embodiment of the present disclosure.

Description of reference numbers:

1-shell; 101-top cover; 102-bottom cover; 2-coil; 3-shield layer; 4-heat exchange shell; 5-radiator; 6-control assembly; 7-drive assembly; 8-first changer Heater; 9-second heat exchanger; 10-support assembly; 11-flexible layer.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the technical solutions of the present disclosure will be clearly and completely described below with reference to the specific embodiments of the present disclosure and the corresponding drawings. Obviously, the described embodiments are only some, but not all, embodiments of the present disclosure. Based on the embodiments in the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present disclosure.

The technical solutions disclosed by the various embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings.

1 to 8 , an embodiment of the present disclosure provides a wireless charging stand for charging an electronic device, and the wireless charging stand includes:

Housing 1, coil 2 and heat sink assembly.

The coil 2 is used to wirelessly charge the electronic device, the housing 1 has an installation cavity, and the housing 1 has a first surface for facing the electronic device; the heat dissipation component is installed in the installation cavity , the heat dissipation assembly has a first heat exchanger 8, a second heat exchanger 9, a connecting pipe and a drive assembly 7, the first heat exchanger 8 is provided with a first passage, the second heat exchanger 9 There is a second passage inside, the connecting pipe connects the first passage and the second passage to form a closed circulation channel, the circulation channel is filled with heat exchange medium, and the drive assembly 7 is connected to the In the circulation channel, the driving component 7 is used to drive the flow of the heat exchange medium, the first heat exchanger 8 is adjacent to the first surface, and the first heat exchanger 8 is used for the first surface Heat dissipation; the coil 2 is arranged on the first side of the first heat exchanger 8, the first side faces away from the first surface, the first heat exchanger 8 can absorb the coil 2 during the charging process The heat generated in the coil 2 reduces the operating temperature of the coil 2 .

Specifically, the casing 1 includes a top cover 101 close to the first surface, and the first heat exchanger 8 is disposed in the top cover 101 . The function of the first heat exchanger 8 is to dissipate heat for the first surface, and the top cover 101 can provide stable support and protection for the first heat exchanger 8, ensuring the first heat exchange The heat exchange stability and heat exchange efficiency of the heat exchanger 8. In addition, the first heat exchanger 8 can also be arranged at the position of the casing 1 close to the top cover 101, which can also play a role in absorbing the heat generated during the charging of the coil 2, and increases the Compactness inside the wireless charging cradle.

Optionally, the first heat exchanger 8 may have a plate-like structure, an opening is provided on the casing 1, and the first heat exchanger 8 is arranged at the opening, so that the first heat exchange The device 8 can be used as a support structure of the wireless charging stand on the basis of ensuring heat exchange.

The electronic device needs to be close to the top cover 101 during wireless charging. During the wireless charging process, the coil 2 will generate a lot of heat. After the inflow, just between the coil 2 and the electronic equipment with a higher temperature, the low temperature working medium can absorb the heat generated by the coil 2, the temperature of the working medium gradually becomes higher and flows into the second heat exchange At this time, the radiator 5 can cool the high-temperature working fluid in the second heat exchanger 9, and the temperature of the working fluid gradually decreases and flows into the first heat exchanger under the driving of the driving component 7. The heat exchanger 8 forms a stable circulating working medium, which improves the heat dissipation efficiency of the wireless charging stand.

In addition, the top cover 101 may be a material with a certain strength and magnetic permeability, and specifically may be a plastic, ceramic, phase change material, etc. with a certain thermal conductivity function, or a composite material of the above materials.

Optionally, the housing 1 further includes a bottom cover 102 away from the top cover 101 , and a radiator 5 is disposed between at least part of the second heat exchanger 9 and the bottom cover 102 . Specifically, in the process of using the wireless charging stand to charge the electronic device, the bottom cover 102 is kept away from the electronic device, which facilitates the radiator 5 to remove the heat in the second heat exchanger 9 from the heat in the second heat exchanger 9 . The bottom cover 102 is transferred to the outside of the wireless charging stand, which ensures stable use of the wireless charging stand.

Specifically, the second heat exchanger 9 includes a second heat exchanger body and a heat exchange shell 4, and the heat exchange shell 4 is disposed outside the second heat exchanger body and exchanges heat with the second heat exchanger The heat exchange shell 4 can be made of a material with high thermal conductivity, so as to facilitate the heat dissipation of the high temperature working fluid in the second heat exchanger 9 . The second heat exchanger 9 may be a plate heat exchanger or a tubular heat exchanger. When the second heat exchanger 9 is a plate heat exchanger, the second heat exchanger body may be the heat exchanger. When the second heat exchanger 9 is a tube heat exchanger, the second heat exchanger body may be the heat exchange tube bundle and tube sheet in the heat exchange shell 4 .

Specifically, referring to FIG. 1 , the second heat exchanger 9 can be arranged directly below the coil 2 , which can ensure the structural symmetry of the wireless charging base; in addition, the second heat exchanger 9 is also It can be arranged in the side space of the coil 2, that is, the remaining space in the casing 1, so that the idle space in the casing 1 can be fully utilized, and the structural compactness of the wireless charging stand can be improved.

Specifically, the number of the first heat exchanger 8 and the second heat exchanger 9 may be one, two, three, four or more. When the number of the first heat exchanger 8 and the second heat exchanger 9 is one, the first heat exchanger 8 and the second heat exchanger 9 may further include a plurality of inlets and outlet; when the number of the first heat exchanger 8 and the second heat exchanger 9 are multiple, the number of the first heat exchanger 8 and the number of the second heat exchanger 9 can be The same or different, which is not limited in the present disclosure.

Specifically, referring to FIG. 3 , both the input end and the output end of the first heat exchanger 8 are one, that is, one outlet and one inlet, and the outlet and the inlet of the first heat exchanger 8 are arranged on the top cover 101 on the same side. Referring to FIG. 4 , the input end and the output end of the second heat exchanger 9 are also one, that is, one outlet and one inlet, and the output end of the first heat exchanger 8 is connected to the second heat exchanger 9 The input ends of the heat exchangers are connected to each other, so that the single input and single output of the working fluid in the first heat exchanger 8 and the single input and single output of the working fluid in the second heat exchanger 9 are realized.

In a specific embodiment, referring to FIG. 5a, the first passage in the first heat exchanger 8 is composed of bent pipes, and the pipes in the first heat exchanger 8 form a plurality of bent parts, And the long side of the bending part is parallel to the long side of the top cover 101, and the short side of the bending part is parallel to the short side of the top cover 101; A passage forms a plurality of bending parts, and the long sides of the bending parts are parallel to the short sides of the top cover 101, and the short sides of the bending parts are parallel to the long sides of the top cover 101; A plurality of continuous bending parts are formed in the middle of the first passage in the first heat exchanger 8, and the input end of the first heat exchanger 8 is communicated with the middle of the continuous bending parts. The output end communicates with both outlets of the continuous bend.

Optionally, the number of the first passage is one, the input end of the first passage includes a first inlet and a second inlet, the output end of the first passage includes a first outlet and a second outlet, and the The first outlet and the second outlet are both communicated with the input end of the second heat exchanger 9, and the first inlet and the second inlet are both communicated with the output end of the second heat exchanger 9, The drive assembly 7 is disposed between the output end of the second heat exchanger 9 and the input end of the first heat exchanger 8 .

Specifically, the working fluids at the input end of the first heat exchanger 8 and the output end of the second heat exchanger 9 are both low-temperature working fluids, and the function of the driving component 7 is to exchange the second heat exchanger. The working fluid at the output end of the heat exchanger 9 is transported to the input end of the first heat exchanger 8 to ensure the circulation of the working fluid, while the driving component 7 is generally a pump body. The requirements are higher. In order to improve the applicability and service life of the drive assembly 7, the drive assembly 7 is arranged on the channel for conveying the low temperature working medium.

Optionally, the number of the second passage is one, the input end of the second passage includes a third inlet and a fourth inlet, and the output end of the second passage includes a third outlet and a fourth outlet;

the first outlet and the second outlet communicate with the third inlet and the fourth inlet, respectively, the first inlet and the second inlet communicate with the third outlet and the fourth outlet, respectively, The drive assembly 7 is disposed between the output end of the second heat exchanger 9 and the input end of the first heat exchanger 8 .

Specifically, in the case where the number of the first passage and the second passage is one, in order to avoid the problem of inability to exchange heat due to the easy blockage of a single inlet and outlet, the first passage and the second passage may be combined. There are multiple entrances and exits of the passage, such as two, three or four, so that when one of the entrances and exits is blocked, the other entrances and exits can also provide heat exchange channels, which improves the reliability of heat exchange.

Specifically, the first heat exchanger 8 may only include the first passage, which is more convenient for heat exchange between the first heat exchanger 8 and the coil 2; in addition, the first heat exchange The device 8 may further comprise a casing, and a first passage is provided in the casing, or a pipe is arranged in the casing, and the pipe forms the first passage. Likewise, the second heat exchanger 9 may also include only the second passage, or a casing with the second passage disposed inside.

The number of the first passages is two, the outlets of the two first passages are both connected to the input end of the second heat exchanger 9, and the inlets of the two first passages are both connected to the second heat exchanger 9. The output end of the heat exchanger 9 is in communication, and the drive assembly 7 is arranged between the output end of the second heat exchanger 9 and the input end of the first heat exchanger 8 .

Specifically, referring to FIG. 6 , the two inlets of the first passage are arranged in the middle of the first side of the top cover 101 , and the two outlets of the first passage are symmetrically arranged at the two inlets of the first passage On both sides of the first heat exchanger 8, the double-in and double-out of the working medium is realized.

Specifically, referring to FIG. 7 , the number of the second passage is two, the two inlets of the second passage are arranged in the middle of the same side of the heat exchange shell 4 , and the two outlets of the second passage are symmetrical The two inlets are arranged on both sides of the two inlets to realize the double inlet and double outlet of the working medium in the second heat exchanger 9 .

In a specific embodiment, referring to FIG. 8a , the number of the first passages is two, each of the first passages forms a plurality of bending parts, and the long sides of the bending parts are connected to the top The long side of the cover 101 is parallel, and the short side of the bent portion is parallel to the short side of the top cover 101; referring to FIG. 8b, the number of the first passages is two, and each of the first passages is formed with multiple A bending part, the long side of the bending part is parallel to the short side of the top cover 101 , and the short side of the bending part is parallel to the long side of the top cover 101 . Optionally, the inlets of the two first passages are respectively arranged on the second side and the third side of the top cover 101, and the second side and the third side are oppositely arranged on the top cover 101 on both sides.

Specifically, referring to FIG. 8 c , the number of the first passages is two, each of the first passages forms a plurality of bending parts, and the long sides of the bending parts are parallel to the short sides of the top cover 101 , the short side of the bent portion is parallel to the long side of the top cover 101 , the entrances of the two first passages are arranged on the second side and the third side of the top cover 101 , specifically one of the The entrance of the first passage is a first entrance, and the first entrance is disposed under the top cover 101 , and the other entrance of the first passage is a second entrance, and the second entrance is disposed on the top cover 101 . top. Since the entrance of the first passage is a low-temperature working medium, the low-temperature working medium can quickly absorb the heat generated by the coil 2, and the low-temperature working medium is simultaneously introduced from both ends of the top cover 101 to achieve rapid and efficient absorption of the low-temperature working medium. The heat generated by the coil 2 can also balance the overall temperature of the top cover 101 .

Optionally, the first heat exchanger 8 and the second heat exchanger 9 are filled with a flowing working medium, and the working medium is one of heat-conducting liquid or heat-conducting gas. Specifically, it can be water, silicone oil, air, etc. Liquids such as water and silicone oil have a large specific heat capacity, and can well absorb the heat generated by the coil 2 in the case of a small circulation amount; the use of air working medium can greatly reduce the cost of labor. Quality cost, and safety and stability.

Optionally, the working medium is a mixture of heat-conducting fluid and heat-conducting powder. Specifically, the heat-conducting fluid can be liquids such as water and silicone oil, and the heat-conducting powder can be materials with good thermal conductivity such as BN (boron nitride), SiC (silicon carbide), and phase change capsules. BN materials have frictional properties. It has the characteristics of low coefficient, good high temperature stability, good thermal shock resistance, high strength and high thermal conductivity, which can be well combined with heat transfer fluid to obtain a stable and thermally conductive mixture; It has the characteristics of high thermal expansion coefficient, small thermal expansion coefficient and good wear resistance, and can also be well compounded with heat transfer fluid.

Optionally, the heat sink 5 includes a plurality of heat dissipation fins arranged side by side, one end of the heat dissipation fin is close to the second heat exchanger 9 , and the other end of the heat dissipation fin is close to the bottom cover 102 .

Specifically, the heat exchange shell 4 and the heat sink 5 may be made of high thermal conductivity metals such as copper, copper alloy and aluminum alloy, or may be ceramics such as AlN (aluminum nitride) and SiC. The heat exchange shell 4 and the radiator 5 may be connected by welding, or may be in contact with each other by filling with a thermally conductive interface material, both of which can achieve a good heat dissipation effect. In order to reduce the weight of the radiator 5 while ensuring the heat dissipation effect of the radiator 5, the radiator 5 can be provided with a plurality of heat dissipation fins arranged side by side, and the plurality of heat dissipation fins form a multi-mesh heat dissipation The channel can also facilitate the dissipation of heat and greatly reduce the weight of the heat sink 5 .

Optionally, referring to FIG. 1 and FIG. 2 , an electromagnetic shielding layer 3 is provided on the side of the coil 2 away from the top cover 101 .

Specifically, the material of the electromagnetic shielding layer 3 may be a metal material or an alloy, and the electromagnetic shielding layer 3 is disposed on the side of the coil 2 away from the top cover 101 , that is, the coil 2 is far away from the top cover 101 during charging. One side of the electronic device can reduce the magnetic leakage of the coil 2 and ensure the efficiency of wireless charging; in addition, the coil 2 and the electromagnetic shielding layer 3 are filled with thermally conductive glue, which can facilitate the operation of the coil 2 Heat is lost. A thermally conductive adhesive may also be filled between the electromagnetic shielding layer 3 and the housing 1 , and the thermally conductive adhesive may be a thermally conductive interface material such as thermally conductive silicone grease or thermally conductive gel.

Optionally, referring to FIG. 1 , the wireless charging stand further includes a control assembly 6 , and the control assembly 6 is electrically connected to the coil 2 and the driving assembly 7 .

Specifically, the control assembly 6 can include a power supply and a control board, and the power supply can provide a stable power supply for the coil 2 and the driving assembly 7, and achieve stable and efficient heat dissipation while ensuring wireless charging; in addition, The control board can control the driving power of the driving assembly 7, so as to flexibly adjust the heat dissipation efficiency.

Optionally, referring to FIG. 1 , the wireless charging stand further includes a flexible layer 11 , and the flexible layer 11 is disposed on the surface of the top cover 101 .

Specifically, when the wireless charging stand is charging an electronic device, the electronic device needs to be close to the surface of the top cover 101. In order to avoid wear caused by hard contact between the electronic device and the top cover 101, the The surface of the top cover 101 is provided with the flexible layer 11 , and the flexible layer 11 can be made of materials such as silica gel, rubber, foam with certain elasticity and thermal conductivity, or a composite material composed of the above materials. The arrangement of the flexible layer 11 can fully contact the wireless charging base after the electronic device is pressed, thereby reducing the thermal resistance between the back cover of the electronic device and the cooling medium of the wireless charging base.

Optionally, referring to FIG. 1 , the wireless charging stand further includes a support assembly 10 , and a plurality of the support assemblies 10 are disposed on the second surface of the bottom cover 102 , and the second surface is away from the top cover 101 . .

Specifically, the number of the support assemblies 10 may be two, three or more. When the number of the support assemblies 10 is two, the support assemblies 10 can be arranged in a long strip, and the two support assemblies 10 are disposed opposite to each other to achieve stable support for the wireless charging stand; When the number of the support assemblies 10 is greater than two, the multiple support assemblies 10 only serve as point supports to stably support the wireless charging stand.

Optionally, an insulating device is provided between the second heat exchanger 9 and the coil 2 .

Specifically, the temperature of the fluid in the second heat exchanger 9 is relatively high, in order to prevent the fluid in the second heat exchanger 9 from transferring heat to the coil 2 when the heat is not dissipated in time, in the second heat exchanger 9 The thermal insulation device is provided between the heat exchanger 9 and the coil 2 . The thermal insulation device can be a layered structure composed of thermal insulation materials, and the thermal insulation materials can be one or more combinations of glass fiber, asbestos, rock wool, silicate, and aerogel; in addition, Between the second heat exchanger 9 and the coil 2, there may be a structural layer that supports the coil 2 and belongs to the casing. In order to ensure the structural strength of the casing, the structural layer may be a metal structure. The thermal insulation of the metal structure is poor, and a layered structure composed of thermal insulation materials can be covered on the structural layer, which can also achieve a good thermal insulation effect. In addition, the structural layer may also be a hollow structure, and the air or vacuum state in the hollow structure can effectively insulate heat.

Embodiments of the present disclosure also provide an electronic device assembly, including an electronic device and the wireless charging stand;

The wireless charging stand can wirelessly charge the electronic device.

Specifically, the electronic device may be one of a smart watch, a mobile phone, a tablet computer, an e-book reader, an MP3 player, an MP4 player, a computer, a set-top box, a smart TV, and a wearable device.

The embodiments of the present disclosure have been described above in conjunction with the accompanying drawings, but the present disclosure is not limited to the above-mentioned specific embodiments, which are merely illustrative rather than restrictive. Under the inspiration of the present disclosure, without departing from the scope of the present disclosure and the protection scope of the claims, many forms can be made, which all fall within the protection of the present disclosure.

Claims (10)

1. The utility model provides a wireless charging seat for charge for electronic equipment, wireless charging seat has the coil, the coil is used for charging for electronic equipment, its characterized in that, wireless charging seat includes:

a housing having a mounting cavity therein, the housing having a first surface for facing an electronic device;

the heat dissipation assembly is installed in the installation cavity and provided with a first heat exchanger, a second heat exchanger, a connecting pipe and a driving assembly, a first passage is arranged in the first heat exchanger, a second passage is arranged in the second heat exchanger, the connecting pipe is communicated with the first passage and the second passage to form a closed circulation channel, heat exchange media are filled in the circulation channel, the driving assembly is connected into the circulation channel and used for driving the heat exchange media to flow, the first heat exchanger is adjacent to the first surface, and the first heat exchanger is used for dissipating heat of the first surface;

the coil is disposed on a first side of the first heat exchanger, the first side facing away from the first surface.

2. The wireless charging dock of claim 1, wherein the housing comprises a top cover adjacent to the first surface, the first heat exchanger being disposed within the top cover.

3. The wireless charging dock of claim 2, wherein the housing further comprises a bottom cover remote from the top cover, and a heat sink is disposed between at least a portion of the second heat exchanger and the bottom cover.

4. The wireless charging stand according to claim 1, wherein the number of the first passages is two, the outlets of the two first passages are both communicated with the input end of the second heat exchanger, the inlets of the two first passages are both communicated with the output end of the second heat exchanger, and the driving assembly is disposed between the output end of the second heat exchanger and the input end of the first heat exchanger.

5. The wireless charging stand according to claim 2, wherein the input end of the first heat exchanger is located in the middle of the first side of the top cover, and the outlets of the two first heat exchangers are symmetrically arranged on two sides of the input end of the first heat exchanger.

6. The wireless charging dock of claim 3, wherein the heat sink comprises a plurality of fins, one end of the fins being adjacent to the second heat exchanger and the other end of the fins being adjacent to the bottom cover.

7. The wireless charging stand according to claim 2, wherein an electromagnetic shielding layer is disposed on a side of the coil away from the top cover.

8. The wireless charging dock of claim 2, further comprising a flexible layer disposed on a surface of the top cover.

9. The wireless charging dock of claim 1, wherein the second heat exchanger comprises a second heat exchanger body and a heat exchange housing, the heat exchange housing being disposed outside the second heat exchanger body.

10. The wireless charging dock of claim 1, wherein a thermal insulation means is disposed between the second heat exchanger and the coil.

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