CN111615299B

CN111615299B - Wireless charging seat

Info

Publication number: CN111615299B
Application number: CN202010415118.6A
Authority: CN
Inventors: 王森
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2022-11-01
Anticipated expiration: 2040-05-15
Also published as: CN111615299A

Abstract

Embodiments of the present disclosure provide a wireless charging stand, the wireless charging stand includes a housing, a coil, and a heat dissipation component. There is an installation cavity in the casing, and the casing has a first surface for facing the electronic equipment; the heat dissipation assembly is installed in the installation cavity, and the heat dissipation assembly has a first heat exchanger, a second heat exchange The first heat exchanger is provided with a first passage, the second heat exchanger is provided with a second passage, and the connecting pipe communicates with the first passage and the first passage. Two passages are formed to form a closed circulation channel, and the driving assembly is connected into the circulation channel; the coil is arranged on the first side of the first heat exchanger; at least part of the second heat exchanger is connected to the A heat dissipation unit is arranged between the casings. The wireless charging stand of the embodiment of the present disclosure improves the heat dissipation efficiency of the wireless charging stand by forming a stable circulating heat exchange medium in the casing, and ensures the safety of the electronic device.

Description

Wireless charging seat

Technical Field

The present disclosure relates to the field of wireless device technology, and in particular, to a wireless charging cradle.

Background

The wireless charging technology enables the charger to get rid of the limitation of a charging wire, the complete separation of the mobile phone and the power supply is realized, and the safety and the flexibility are greatly improved.

However, in the wireless charging process, along with the increase of the quick charging power, the heat productivity of the coil of the charging seat is greatly increased, and the heat produced by the charging seat cannot be dissipated in time, so that the safety risk of the charging seat is increased, and the wireless charging power can be reduced.

Disclosure of Invention

The embodiment of the disclosure provides a wireless charging seat to solve the problem of low heat dissipation efficiency of the conventional wireless charging seat.

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

in a first aspect, an embodiment of the present disclosure provides a wireless charging cradle for charging an electronic device, the wireless charging cradle having a coil, the coil being used for charging the electronic device, the wireless charging cradle including:

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 formed in the first heat exchanger, a second passage is formed 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 close to the first surface, and the first heat exchanger is used for dissipating heat of the first surface;

the coil is arranged on a first side of the first heat exchanger, and the first side faces away from the first surface;

and a heat dissipation unit is arranged between at least part of the second heat exchanger and the shell, and comprises a forced refrigeration device.

The technical scheme adopted by the embodiment of the disclosure can achieve the following beneficial effects:

the embodiment of the disclosure provides a wireless charging seat, which comprises a shell, a coil and a heat dissipation assembly. According to the wireless charging seat, the first passage in the first heat exchanger and the second passage in the second heat exchanger are communicated through the connecting pipe to form the circulating passage, the wireless charging coil is adjacent to the first heat exchanger, the low-temperature circulating heat exchange medium in the first heat exchanger flows to take away heat generated in the coil charging process, the low-temperature circulating heat exchange medium absorbs the heat and then reaches the second heat exchanger, the high-temperature circulating heat exchange medium in the second heat exchanger utilizes the forced refrigeration device to accelerate heat dissipation of the high-temperature circulating heat exchange medium, and the heat dissipation efficiency of the wireless charging seat is improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:

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

FIG. 2 isbase:Sub>A schematic cross-sectional view A-A of FIG. 1 provided in accordance with an embodiment of the present disclosure;

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

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

fig. 5 is a schematic cross-sectional view of another wireless charging cradle according to an embodiment of the disclosure;

FIG. 6 isbase:Sub>A schematic cross-sectional view A-A of FIG. 5 provided in accordance with an embodiment of the present disclosure;

fig. 7 is a partially enlarged view of another wireless charging cradle according to an embodiment of the disclosure.

Description of the reference numerals:

1-a shell; 101-a top cover; 102-a bottom cover; 2-a coil; 3-a shielding layer; 4-a heat exchange housing; 5-a heat dissipation unit; 6-forced refrigerating device; 7-a drive assembly; 8-air inlet; 9-air outlet; 10-a support assembly; 11-a first heat exchanger; 12-a second heat exchanger; 13-a control assembly; 14-a flexible layer; 15-thermoelectric cooling module.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

Technical solutions disclosed in the embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.

Referring to fig. 1 to 7, an embodiment of the present disclosure provides a wireless charging cradle for charging an electronic device, the wireless charging cradle including:

a housing 1, a coil 2 and a heat sink assembly.

The coil 2 is used for wirelessly charging the electronic device, the housing 1 has a mounting cavity therein, and the housing 1 has a first surface for facing the electronic device; the heat dissipation assembly is installed in the installation cavity and provided with a first heat exchanger 11, a second heat exchanger 12, a connecting pipe and a driving assembly 7, a first passage is arranged in the first heat exchanger 11, a second passage is arranged in the second heat exchanger 12, the connecting pipe is communicated with the first passage and the second passage to form a closed circulating channel, a heat exchange medium is filled in the circulating channel, the driving assembly 7 is connected into the circulating channel, the driving assembly 7 is used for driving the heat exchange medium to flow, the first heat exchanger 11 is adjacent to the first surface, and the first heat exchanger 11 is used for dissipating heat of the first surface; the coil 2 is arranged on a first side of the first heat exchanger 11, the first side is away from the first surface, and the first heat exchanger 11 can absorb heat generated by the coil 2 in a charging process, so that the service temperature of the coil 2 is reduced; at least part second heat exchanger 12 with be provided with radiating element 5 between the casing 1, radiating element 5 includes forced refrigeration device 6, forced refrigeration device 6's upper surface is close to the lower surface of second heat exchanger 12, forced refrigeration device 6 can shift and absorb through forced refrigeration means such as forced air-cooling or water-cooling high temperature heat transfer medium's in the second heat exchanger 12 heat, and then show to reduce heat transfer medium temperature in the second heat exchanger 12, microthermal heat transfer medium enters into in the first heat exchanger 11, can take away the heat that produces in the coil 2 charging process, improve the radiating efficiency of wireless charging seat avoids the high temperature damage of coil 2.

Optionally, the housing 1 comprises a top cover 101 adjacent to the first surface, and the first heat exchanger 11 may be disposed within the top cover 101. The first heat exchanger 11 is used for dissipating heat from the first surface, and the top cover 101 can provide stable support and protection for the first heat exchanger 11, so that the heat exchange stability and the heat exchange efficiency of the first heat exchanger 11 are ensured. In addition, the first heat exchanger 11 can also be disposed at a position of the housing 1 close to the top cover 101, which can also absorb heat generated during the charging process of the coil 2, and increase the structural compactness in the wireless charging stand.

Optionally, the first heat exchanger 11 may be a plate-shaped structure, an opening is provided on the housing 1, and the first heat exchanger 11 is disposed at the opening, so that the first heat exchanger 11 can be used as a support structure of the wireless charging stand on the basis of ensuring heat exchange.

The electronic equipment needs to be close to the top cover 101 when wirelessly charging, in the wireless charging process, the coil 2 can generate more heat, at this time, a low-temperature heat exchange medium flows into the coil 2 from the input end of the first heat exchanger 11 and then is just positioned between the coil 2 and the electronic equipment, the low-temperature heat exchange medium can absorb the heat generated by the coil 2, the temperature of the heat exchange medium gradually increases and flows into the second heat exchanger 12, at this time, the heat dissipation unit 5 can cool a high-temperature working medium in the second heat exchanger 12, the temperature of the heat exchange medium gradually decreases and flows into the first heat exchanger 11 under the driving of the driving assembly 7, a stable circulating working medium is formed, and the heat dissipation efficiency of the wireless charging seat is improved.

In addition, the top cover 101 may be a material having a certain strength and being permeable to magnetism, specifically, a plastic, a ceramic, a phase change material, etc. having a certain heat conduction function, or a composite material of the above materials.

Optionally, the casing 1 further comprises a bottom cover 102 far from the top cover 101, and the heat dissipation unit 5 is disposed between the second heat exchanger 12 and the bottom cover 102. Specifically, in the process of charging the electronic device by using the wireless charging cradle, the bottom cover 102 is far away from the electronic device, which facilitates the heat dissipation unit 5 to transfer the heat in the second heat exchanger 12 from the bottom cover 102 to the outside of the wireless charging cradle, and ensures stable use of the wireless charging cradle.

Specifically, the second heat exchanger 12 includes a second heat exchanger body and a heat exchange shell 4, the heat exchange shell 4 is disposed on the outer side of the second heat exchanger body and contacts with the second heat exchanger body, and the heat exchange shell 4 may be made of a material with high thermal conductivity, so as to facilitate heat dissipation of a high-temperature working medium in the second heat exchanger 12. The second heat exchanger 12 may be a plate heat exchanger or a tube heat exchanger, when the second heat exchanger 12 is a plate heat exchanger, the second heat exchanger body may be a heat exchange plate in the heat exchange shell 4, and when the second heat exchanger 12 is a tube heat exchanger, the second heat exchanger body may be a heat exchange tube bundle and a tube plate in the heat exchange shell 4.

Specifically, referring to fig. 1, the second heat exchanger 12 may be disposed right below the coil 2, so as to ensure structural symmetry of the wireless charging stand; in addition, the second heat exchanger 12 may also be disposed in a lateral space of the coil 2, that is, a remaining space in the housing 1, so that an idle space in the housing 1 may be fully utilized, and the structural compactness of the wireless charging stand is improved.

Specifically, the forced cooling device 6 may be a cooling fan, which may be a centrifugal fan, or an axial flow fan or a mixed flow fan; the number of the heat dissipation fans can be one, two, three, four or more, and under the condition that the number of the heat dissipation fans is multiple, the heat dissipation fans can be connected in parallel or in series, so that the purpose of stable and efficient heat dissipation can be achieved; in addition, the forced cooling device 6 may also be a plasma cooling device or a liquid cooling device, which can also achieve the purpose of efficient heat dissipation, and the disclosure does not limit the specific type of the forced cooling device 6.

Optionally, the driving assembly 7 is disposed between the output of the second heat exchanger 12 and the input of the first heat exchanger 11.

Specifically, the working media at the input end of the first heat exchanger 11 and the output end of the second heat exchanger 12 are low-temperature working media, the driving assembly 7 is used for conveying the working media at the output end of the second heat exchanger 12 to the input end of the first heat exchanger 11 and ensuring the circulation of the working media, the driving assembly 7 is generally a pump body, and the higher the temperature of the working media is, the higher the requirement on the pump body is. In order to increase the applicability and the service life of the drive assembly 7, the drive assembly 7 is arranged on a channel for conveying a low-temperature working medium.

In a specific embodiment, referring to fig. 3, the number of the input ends of the first heat exchanger 11 is one, and the first heat exchanger 11 is located in the middle of the first side of the top cover 101, and the number of the output ends of the first heat exchanger 11 is two, and the first heat exchanger 11 includes a first outlet and a second outlet, and the first outlet and the second outlet are symmetrically disposed on two sides of the input end of the first heat exchanger 11. Referring to fig. 4, the number of the input ends of the second heat exchanger 12 is two, and the second heat exchanger 12 includes a first inlet and a second inlet, the number of the output ends of the second heat exchanger 12 is one, and the first outlet and the second outlet are respectively communicated with the first inlet and the second inlet, so that a single-inlet and a double-outlet of the working medium in the first heat exchanger 11 and a double-inlet and a single-outlet of the working medium in the second heat exchanger 12 are realized.

Optionally, flowing working media are filled in the first heat exchanger 11 and the second heat exchanger 12, and the working media are one of heat conduction liquid or heat conduction gas. Specifically, the specific heat capacity of liquid such as water, silicon oil, air and the like is large, and the heat generated by the coil 2 can be well absorbed under the condition that the circulation amount is small; the air working medium can greatly reduce the cost of the working medium and is safe and stable.

Optionally, the working medium may also be a mixture of a heat-conducting fluid and a heat-conducting powder. Specifically, the heat-conducting fluid can be liquid such as water and silicone oil, the heat-conducting powder can be a material with good heat-conducting property such as BN, siC and phase-change capsules, the BN material has the characteristics of low friction coefficient, good high-temperature stability, good heat and shock resistance, high strength and high heat-conducting coefficient, and can be well combined with the heat-conducting fluid to obtain a stable mixture with good heat conductivity; silicon carbide can be well compounded with heat-conducting fluid due to the characteristics of stable chemical property, high heat conductivity coefficient, small thermal expansion coefficient and good wear resistance.

Optionally, the heat dissipation unit 5 further includes a heat sink, and the heat sink includes a plurality of heat dissipation fins arranged side by side, one end of each heat dissipation fin is close to the second heat exchanger 12, and the other end of each heat dissipation fin is close to the bottom cover 102. Specifically, the heat dissipation fins may be made of a metal material with good thermal conductivity, such as silver, copper, aluminum, steel, or an alloy of these metals, so as to facilitate heat transfer from the second heat exchanger 12 to the bottom cover 102, and then dissipate to the outside of the wireless charging cradle.

Specifically, the heat exchange housing 4 and the heat sink may be made of a high thermal conductive metal such as copper, a copper alloy, and an aluminum alloy, or may be made of a ceramic such as AlN and SiC. The heat exchange shell 4 and the radiator can be connected in a welding mode, and can also be in contact by filling heat conduction interface materials, so that a good heat dissipation effect can be achieved.

Optionally, referring to fig. 2 and 6, the wireless charging dock further includes an air inlet 8 and an air outlet 9, the air inlet 8 is disposed on the bottom cover 102 and is opposite to the forced cooling device 6, the air outlet 9 is disposed on at least one side wall of the housing 1, and the side wall is disposed between the top cover 101 and the bottom cover 102.

Specifically, since the forced cooling device 6 is disposed close to the bottom cover 102, the air outlet 8 on the bottom cover 102 can provide stable low-temperature air for the forced cooling device 6 in time. The number of the air outlets 9 may be one, two, three, four or more, and when the number of the air outlets 9 is plural, the plural air outlets 9 may be disposed on the same side wall of the housing 1. In order to improve the efficiency of the air outlet, the air outlets 9 may also be disposed on different side walls of the housing 1, such as opposite side walls.

In a specific embodiment, referring to fig. 2, the number of the air outlets 9 is two, and the two air outlets are respectively arranged on the opposite side walls of the casing 1 to form a bottom-in-two-side-out air duct design, which not only can strengthen the heat dissipation of the heat dissipation unit 5 and quickly reduce the temperature of the working medium in the heat exchange housing 4, but also can avoid the problem of overheating air outlet caused by a single air outlet.

Optionally, referring to fig. 1 and 2, the side of the coil 2 remote from the top cover 101 is provided with an electromagnetic shielding layer 3.

Specifically, the electromagnetic shielding layer 3 may be made of a metal material or an alloy, and the electromagnetic shielding layer 3 is disposed on a side of the coil 2 away from the top cover 101, that is, on a side of the coil 2 away from the electronic device during charging, so that magnetic leakage of the coil 2 can be reduced, and the efficiency of wireless charging is ensured; in addition, heat-conducting glue is filled between the coil 2 and the electromagnetic shielding layer 3, so that heat of the coil 2 can be dissipated conveniently. Heat conducting glue can be filled between the electromagnetic shielding layer 3 and the shell 1, and the heat conducting glue can be heat conducting interface materials such as heat conducting silicone grease, heat conducting gel and the like.

Optionally, referring to fig. 1 and 5, the wireless charging cradle further includes a control component 13, and the control component 13 is electrically connected to the coil 2 and the driving component 7.

Specifically, the control assembly 13 may include a power supply and a control board, and the power supply may provide stable power supply for the coil 2, the driving assembly 7 and the forced cooling device 6, so as to achieve the effect of stable and efficient heat dissipation while ensuring wireless charging; in addition, the control panel can control the driving power of the driving component 7 and the output power of the forced cooling device 6, so as to achieve the purpose of flexibly adjusting the heat dissipation efficiency.

Optionally, referring to fig. 1 and 5, the wireless charging cradle further includes a flexible layer 14, and the flexible layer 14 is disposed on a surface of the top cover 101.

Specifically, when the wireless charging seat charges for electronic equipment, electronic equipment needs to be close to the surface of top cap 101, in order to avoid electronic equipment and the wearing and tearing that hard contact between the top cap 101 brought the surface of top cap 101 has set up flexible layer 14, flexible layer 14 can adopt materials such as silica gel, rubber, the bubble cotton that have certain elasticity and heat conduction function, also can be the combined material that above-mentioned material constitutes. The flexible layer 14 can be fully contacted with the wireless charging seat after the electronic equipment is pressed, so that the thermal resistance between the rear cover of the electronic equipment and the cooling working medium of the wireless charging seat is reduced.

Optionally, referring to fig. 5 to 7, the wireless charging cradle further includes a thermoelectric cooling assembly 15, and the thermoelectric cooling assembly 15 is disposed between the heat dissipation unit 5 and the second heat exchanger 12.

Specifically, thermoelectric refrigeration subassembly 15 set up in radiator unit 5 with between the heat transfer shell 4, thermoelectric refrigeration subassembly 15 with radiating element 5 with heat transfer shell 4 constitutes sandwich structure, thermoelectric refrigeration subassembly 15's cold side with heat transfer shell 4 contacts, thermoelectric refrigeration subassembly 15's hot side with radiating element 5 contacts, and heat conduction interface materials such as heat conduction gel or silicone grease can be filled to above-mentioned contact surface, the heat of hot working medium reaches in second heat exchanger 12 through heat transfer shell 4 thermoelectric refrigeration subassembly 15's cold side, then passes through thermoelectric refrigeration subassembly 15's hot side conduction extremely radiating element 5 with the help of force refrigerating plant 6 fast heat dissipation. The thermoelectric refrigeration assembly 15 not only can realize the rapid cooling of high-temperature working medium, but also can obtain low-temperature working medium with the temperature lower than the ambient temperature, so as to achieve the rapid heat dissipation and cooling of the wireless charging seat. In addition, the number of the thermoelectric cooling module 15 may be one or more, and the disclosure is not limited thereto.

Optionally, referring to fig. 1 and 5, the wireless charging cradle further includes a plurality of supporting members 10, and a plurality of the supporting members 10 are disposed on a second surface of the bottom cover 102, and the second surface is far away from the top cover 101.

In particular, 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 may be arranged in a strip shape, and the two support assemblies 10 are oppositely arranged to stably support the wireless charging stand; when the number of the supporting components 10 is greater than two, the plurality of supporting components 10 only perform point supporting to stably support the wireless charging stand.

Optionally, a heat insulation device is arranged between the second heat exchanger 12 and the coil 2.

In particular, the temperature of the fluid inside the second heat exchanger 12 is high, and in order to prevent the fluid inside the second heat exchanger 12 from transferring heat to the coil 2 when heat is not dissipated in time, the thermal insulation means is provided between the second heat exchanger 12 and the coil 2. The heat insulation device can be a layered structure composed of heat insulation materials, and the heat insulation materials can be one or more of glass fiber, asbestos, rock wool, silicate and aerogel; in addition, a structural layer supporting the coil 2 and belonging to the shell can be arranged between the second heat exchanger 12 and the coil 2, the structural layer can be a metal structure in order to ensure the structural strength of the shell, and a layer of layered structure consisting of heat insulation materials can be covered on the structural layer due to poor heat insulation performance of the metal structure, so that a good heat insulation effect can be achieved. In addition, the structural layer can also be a hollow structure, and air or a vacuum state in the hollow structure can play a good role in isolating heat.

The embodiment of the present disclosure further provides an electronic device assembly, which includes an electronic device and the wireless charging cradle;

the wireless charging seat can wirelessly charge the electronic equipment.

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.

While the present disclosure has been described with reference to the embodiments illustrated in the drawings, which are intended to be illustrative rather than restrictive, it will be apparent to those of ordinary skill in the art in light of the present disclosure that many more modifications may be made without departing from the spirit of the disclosure and the scope of the appended claims.

Claims

1. A wireless charging stand for charging an electronic device, the wireless charging stand has a coil, the coil is used for charging an electronic device, it is characterized in that the wireless charging stand comprises:

a casing, the casing has an installation cavity inside, and the casing 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 drive assembly, and the first heat exchanger is provided with a first passage, the second heat exchanger is provided with a second passage, the connecting pipe communicates with 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 driving assembly is connected into the circulation channel, the driving assembly is used to drive the flow of the heat exchange medium, the first heat exchanger is adjacent to the first surface, and the first heat exchanger is used for the heat dissipation from 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;

A heat dissipation unit is provided between at least part of the second heat exchanger and the housing, and the heat dissipation unit includes a forced refrigeration device;

The housing includes a top cover close to the first surface, the first heat exchanger is arranged in the top cover, the material of the top cover is a material with high thermal conductivity and high magnetic permeability, and the material with high thermal conductivity and high magnetic permeability It is one or a combination of plastic and ceramics.

2. The wireless charging stand according to claim 1, wherein the housing further includes a bottom cover away from the top cover, and the heat dissipation unit is arranged between the second heat exchanger and the between the caseback.

3. The wireless charging stand according to claim 2, wherein the heat dissipation unit further comprises a heat sink, the heat sink comprises a plurality of heat dissipation fins, and one end of the heat dissipation fins is close to the first Two heat exchangers, the other end of the heat dissipation fin is close to the bottom cover.

4. The wireless charging stand according to claim 2, further comprising an air inlet and an air outlet, the air inlet is arranged on the bottom cover and is opposite to the forced cooling device, and the air outlet It is arranged on at least one side wall of the housing, and the side wall is arranged between the top cover and the bottom cover.

5 . The wireless charging stand according to claim 1 , wherein an electromagnetic shielding layer is provided on a side of the coil away from the top cover.

6 . The wireless charging stand according to claim 1 , further comprising a flexible layer disposed on the surface of the top cover.

7 . The wireless charging stand according to claim 1 , further comprising a thermoelectric cooling component disposed between the heat dissipation unit and the second heat exchanger.

8. The wireless charging stand according to claim 2, further comprising a support component, a plurality of support components are arranged on the second surface of the bottom cover, and the second surface is away from the top cover.

9 . The wireless charging stand according to claim 1 , wherein a heat insulating device is provided between the second heat exchanger and the coil.