Wireless charger

Abstract

The invention discloses a wireless charger, and belongs to the technical field of wireless charging. According to the wireless charger, when the semiconductor chilling plate works, the low-temperature side of the semiconductor chilling plate can cool air in the first cavity, then the low-temperature air is blown to the first channel through the air blowing piece, and finally the low-temperature air is blown out through the first air outlet; the cooling speed of the wireless receiving coil assembly can be greatly improved, and the heat dissipation effect is improved; meanwhile, the air blowing piece can blow air heated by the high-temperature side of the semiconductor chilling plate in the first cavity to the second channel, so that the high-temperature air is exhausted through the second air outlet, and the situation that the temperature of the wireless charger rises due to the fact that the high-temperature air remains in the shell and the second air outlet and the charging equipment are arranged in a staggered mode is avoided; and the heat dissipation effect of the charging equipment is further improved.

Description

Technical Field

[0001] The present invention relates to the technical field of wireless charging, and in particular to a wireless charger. Background Art

[0002] With the popularization of wireless charging technology, more and more mobile phone brands are adopting wireless charging function, and the power level of wireless charging is getting higher and higher.

[0003] The wireless charging receiving coil of the mobile phone is mainly on the back of the mobile phone, close to the side of the shell, almost close to the battery. Since the mobile phone needs to be thin, the receiving coil is generally made of FPC, and its DC impedance is about 10 times that of the transmitting coil. After the receiving coil undergoes high-power charging, its heat generation will rise rapidly, and the generated heat will also radiate and conduct to the battery side, and the temperature in the back cavity of the entire mobile phone will rise. This has been taken into consideration when designing current mobile phones. Many mobile phone back covers will choose glass, ceramics or other materials with good heat dissipation performance. After the heat is conducted to the back cover of the mobile phone, it can be dissipated through the back cover. However, when the temperature of the back cover is thermally balanced with the ambient temperature, the heat dissipation speed of the mobile phone will deteriorate.

[0004] In order to ensure the safety of lithium batteries, the battery protection system of the mobile phone will trigger the over-temperature protection of the battery when the battery temperature reaches the temperature threshold, and then force the wireless charging power to decrease. When the temperature of the battery and coil decreases too slowly, the wireless charging process will be interrupted. The time span for the entire mobile phone battery to be fully charged from 0% to 100% will be extended, affecting the user experience.

[0005] At present, the heat dissipation solution for car wireless chargers mainly relies on the cooling fan to blow natural wind to the back of the phone, relying on air convection to cool the phone. Restricted by factors such as fan volume, fan noise, and air duct design, the fan's air flow rate and fan outlet pressure are relatively small, and the wind pressure loss on the back of the phone is large, the heat dissipation effect is average, and the experience is very poor. Summary of the invention

[0006] The purpose of the present invention is to provide a wireless charger that can improve the heat dissipation effect of a charging device and enhance the user experience.

[0007] In order to achieve the above objectives, the following technical solutions are provided:

[0008] Wireless charger, including:

[0009] A shell, the shell comprising a first cavity, a first channel, a second channel, a first air outlet and a second air outlet, the first air outlet being located on a side of the shell facing the charging device, the first air outlet being arranged opposite to the wireless receiving coil assembly of the charging device, and the second air outlet being arranged offset from the charging device;

[0010] A semiconductor refrigeration sheet, wherein the semiconductor refrigeration sheet is disposed in the first cavity, one end of the first channel is disposed opposite to the low-temperature side of the semiconductor refrigeration sheet and communicated with the first cavity, and the other end is communicated with the first air outlet, one end of the second channel is disposed opposite to the high-temperature side of the semiconductor refrigeration sheet and communicated with the first cavity, and the other end is communicated with the second air outlet;

[0011] A blowing member is used for blowing air into the first cavity.

[0012] As a preferred technical solution of the above wireless charger, the wireless charger further includes a wireless transmitting coil assembly, the housing further includes a second cavity, and the wireless transmitting coil assembly is fixedly disposed in the second cavity;

[0013] The wireless transmitting coil assembly is provided with a central hole, and the central hole is sleeved on the outer side of the other end of the first channel.

[0014] As a preferred technical solution of the above wireless charger, the wireless charger further includes a shielding member, which is fixedly arranged on a side of the wireless transmitting coil assembly facing the wireless receiving coil assembly;

[0015] The shielding member is provided with an avoidance through hole, and the avoidance through hole is sleeved on the outer side of the other end of the first channel.

[0016] As a preferred technical solution of the above wireless charger, the wireless charger also includes:

[0017] A circuit board, wherein the circuit board is fixedly arranged in the housing, and the wireless transmitting coil assembly, the semiconductor cooling sheet and the blowing member are all communicatively connected with the circuit board;

[0018] A first temperature detection element, the first temperature detection element is used to detect the temperature of the wireless transmitting coil assembly, the first temperature detection element is communicatively connected to the circuit board; and / or,

[0019] a second temperature detection member, the second temperature detection member is used to detect the temperature of the high temperature side of the semiconductor refrigeration plate, the second temperature detection member is communicatively connected with the circuit board; and / or,

[0020] A third temperature detection component is used to detect the temperature of the low-temperature side of the semiconductor refrigeration plate, and the third temperature detection component is communicatively connected with the circuit board.

[0021] As a preferred technical solution of the wireless charger, the wireless charger further comprises a first heat sink, which is fixedly arranged on the low temperature side of the semiconductor refrigeration sheet; and / or,

[0022] The wireless charger further includes a second heat sink, which is fixedly mounted on the high temperature side of the semiconductor cooling plate.

[0023] As a preferred technical solution of the above-mentioned wireless charger, the wireless charger also includes a heat insulation member, which is clamped between the first heat sink and the second heat sink, and the heat insulation member is arranged around the outer side of the semiconductor refrigeration sheet in the thickness direction of the semiconductor refrigeration sheet.

[0024] As a preferred technical solution of the above-mentioned wireless charger, the thermal insulation component separates the first cavity into a first sub-cavity and a second sub-cavity that are not connected to each other, the first channel is connected to the first sub-cavity, and the second channel is connected to the second sub-cavity.

[0025] As a preferred technical solution of the above wireless charger, the second air outlet is located on a side of the shell facing the charging device.

[0026] As a preferred technical solution of the above wireless charger, the shell is also provided with a wind shield structure, and the wind shield structure is arranged around the outer side of the second air outlet.

[0027] As a preferred technical solution of the above wireless charger, the shell is further provided with a positioning structure, and when the charging device abuts against the positioning structure, the wireless receiving coil assembly is directly opposite to the first air outlet.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In the wireless charger of the present invention, when the semiconductor refrigeration plate is working, the low-temperature side of the semiconductor refrigeration plate can cool the air in the first cavity, and then blow the low-temperature air to the first channel through the blowing member, and finally blow the low-temperature air out through the first air outlet. Since the first air outlet is directly opposite to the wireless receiving coil assembly of the charging device, the cooling speed of the wireless receiving coil assembly can be greatly improved, and the heat dissipation effect is improved; at the same time, the blowing member can also blow the air heated by the high-temperature side of the semiconductor refrigeration plate in the first cavity to the second channel, so that the high-temperature air is discharged through the second air outlet, thereby cooling the conductor refrigeration plate and avoiding the high-temperature air from being retained in the shell, which causes the temperature of the wireless charger to rise. The second air outlet is staggered with the charging device, which also has the effect of further improving the heat dissipation of the charging device. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a wireless charger and a charging device in an embodiment of the present invention;

[0031] Figure 2This is a schematic diagram of the structure of a wireless charger in an embodiment of the present invention;

[0032] Figure 3 A cross-sectional view of a wireless charger in an embodiment of the present invention;

[0033] Figure 4 An exploded view of a wireless charger in an embodiment of the present invention;

[0034] Figure 5 It is a schematic diagram of the structure of the connection shell and the shielding member in an embodiment of the present invention;

[0035] Figure 6 It is a structural schematic diagram of a connection shell and a wireless transmitting coil assembly in an embodiment of the present invention;

[0036] Figure 7 An exploded view of the connecting shell and the first cover plate, the second cover plate and the third cover plate in an embodiment of the present invention;

[0037] Figure 8 for Figure 7 Enlarged view of point A.

[0038] Reference numerals:

[0039] 100. Charging device; 1. Shell; 1a. Surface shell; 1a1. Flanging; 1a2. Accommodating groove; 1b. Connecting shell; 1b1. First groove; 1b2. Second groove; 1b3. First limiting groove; 1b4. Second limiting groove; 1c1. First cover plate; 1c11. Air outlet 1; 1c12. Boss; 1c2. Second cover plate; 1c21. Air outlet 2; 1c3. Third cover plate; 1d. Bottom shell; 1d1. Air inlet; 11. First cavity; 111. First sub-cavity; 112. Second sub-cavity; 12. First channel; 13. Second channel; 14. First air outlet; 15. Second air outlet; 1 6. Second cavity; 17. Third cavity; 181. Fixing part; 182. Wind shield structure; 183. Positioning structure; 2. Semiconductor refrigeration sheet; 3. Blowing part; 4. Wireless transmitting coil assembly; 41. Ferrite; 42. Transmitting coil body; 43. Center hole; 5. Shielding part; 51. Avoidance through hole; 6. Circuit board; 81. First heat sink; 811. First plate; 812. First fin; 8121. First long fin; 8122. First short fin; 82. Second heat sink; 821. Second plate; 822. Second fin; 8221. Second long fin; 8222. Second short fin; 9. Thermal insulation part. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0044] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0046] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] like Figure 1-8 As shown, this embodiment provides a wireless charger, including a shell 1, a semiconductor refrigeration sheet 2 and a blowing member 3, the shell 1 includes a first cavity 11, a first channel 12, a second channel 13, a first air outlet 14 and a second air outlet 15, the first air outlet 14 is located on the side of the shell 1 facing the charging device 100, the first air outlet 14 is arranged opposite to the wireless receiving coil assembly of the charging device 100, and the second air outlet 15 is staggered with the charging device 100; the semiconductor refrigeration sheet 2 is arranged in the first cavity 11, one end of the first channel 12 is arranged opposite to the low-temperature side of the semiconductor refrigeration sheet 2 and is connected to the first cavity 11, and the other end is connected to the first air outlet 14, one end of the second channel 13 is arranged opposite to the high-temperature side of the semiconductor refrigeration sheet 2 and is connected to the first cavity 11, and the other end is connected to the second air outlet 15; the blowing member 3 is used to blow air into the first cavity 11.

[0048] In the wireless charger of this embodiment, when the semiconductor refrigeration sheet 2 is working, heat will be transferred from one side of the semiconductor refrigeration sheet 2 to the other side, that is, the temperature of one side of the semiconductor refrigeration sheet 2 will be high and the temperature of the other side will be low.

[0049] The low-temperature side of the semiconductor refrigeration plate 2 will cool down the air near it, and the low-temperature air will enter the first channel 12 under the blowing of the blowing member 3, and finally be blown out through the first air outlet 14. Since the first air outlet 14 is arranged opposite to the wireless receiving coil assembly of the charging device 100, the cooling speed of the wireless receiving coil assembly can be greatly increased, thereby improving the heat dissipation effect.

[0050] At the same time, the high temperature side of the semiconductor cooling sheet 2 will heat up the air near it, and the high temperature air will enter the second channel 13 under the blowing of the blowing member 3, and finally blow out through the second air outlet 15, thereby cooling the conductor cooling sheet 2 and preventing the high temperature air from being retained in the housing 1, causing the temperature of the wireless charger to rise. Since the second air outlet 15 is staggered with the wireless receiving coil assembly of the charging device 100, the heat dissipation of the charging device 100 is further improved.

[0051] It should be noted that the first air outlet 14 is arranged directly opposite to the wireless receiving coil assembly of the charging device 100, that is, along the axial direction of the first air outlet 14, the orthographic projection of the first air outlet 14 is located within the orthographic projection of the wireless receiving coil assembly of the charging device 100, so that all airflows blown out of the first air outlet 14 can contact the position where the wireless receiving coil assembly of the charging device 100 is set, thereby improving the utilization rate of the low-temperature airflow and achieving a better cooling effect.

[0052] It can be understood that the two sides of the semiconductor refrigeration sheet 2 along its thickness direction are respectively a high temperature side and a low temperature side.

[0053] Preferably, one end of the first channel 12 is arranged opposite to the low-temperature side of the semiconductor refrigeration plate 2. In other words, along the thickness direction of the semiconductor refrigeration plate 2, the orthographic projection of the opening of one end of the first channel 12 connected to the first cavity 11 is located within the orthographic projection of the semiconductor refrigeration plate 2, so as to facilitate the rapid entry of low-temperature air into the first channel 12.

[0054] Preferably, one end of the second channel 13 is arranged opposite to the high temperature side of the semiconductor refrigeration plate 2. In other words, along the thickness direction of the semiconductor refrigeration plate 2, the orthographic projection of the opening of one end of the second channel 13 connected to the first cavity 11 is located within the orthographic projection of the semiconductor refrigeration plate 2, so as to facilitate the high temperature air to quickly enter the first channel 12.

[0055] It should be noted that this embodiment does not limit the shapes of the first air outlet 14 and the second air outlet 15. For example, the first air outlet 14 includes a plurality of first through holes arranged at intervals, and the second air outlet 15 includes a plurality of second through holes arranged at intervals.

[0056] Furthermore, the wireless charger also includes a wireless transmitting coil assembly 4, and the shell 1 also includes a second cavity 16, and the wireless transmitting coil assembly 4 is fixed in the second cavity 16; the wireless transmitting coil assembly 4 is provided with a center hole 43, and the center hole 43 is sleeved on the outside of the other end of the first channel 12, thereby leaving space for the first air duct. The layout is reasonable, which is conducive to reducing the volume of the wireless charger.

[0057] Specifically, the wireless transmitting coil assembly 4 includes a ferrite 41 and a transmitting coil body 42 fixedly connected to the ferrite 41. The transmitting coil body 42 itself has a center hole, and thus it is only necessary to open the center hole on the ferrite 41. Compared with the wireless transmitting coil assembly 4 in the prior art, the modification is small and the operation is easy.

[0058] It should be noted that this embodiment does not limit the specifications of the transmitting coil body 42. For example, the transmitting coil body 42 can be set with reference to the MP-A13 inductance and size in the Qi protocol (i.e., the "wireless charging" standard launched by the Wireless Power Consortium).

[0059] Furthermore, the wireless charger also includes a shielding member 5, which is fixed to the side of the wireless transmitting coil assembly 4 facing the wireless receiving coil assembly; the shielding member 5 is provided with an avoidance through hole 51, which is sleeved on the outside of the other end of the first channel 12, thereby leaving space for the first channel 12, and the layout is reasonable, which is conducive to reducing the volume of the wireless charger.

[0060] Furthermore, the wireless charger also includes an NFC antenna, which is integrated into the shielding member 5 , has high integration, is easy to assemble, and is also beneficial to reducing the size of the wireless charger.

[0061] Furthermore, the wireless charger further includes a circuit board 6, the housing 1 further includes a third cavity 17, the circuit board 6 is fixedly arranged in the third cavity 17, and the semiconductor cooling sheet 2, the blowing member 3, the wireless transmitting coil assembly 4 and the NFC antenna are all communicatively connected with the circuit board 6. The connection relationship and working principle between the circuit board 6 and the semiconductor cooling sheet 2, the blowing member 3, the wireless transmitting coil assembly 4 and the NFC antenna are all prior arts and will not be described in detail here.

[0062] Optionally, the blowing member 3 is an axial flow fan, which can blow air to the low-temperature side and the high-temperature side of the semiconductor refrigeration plate 2 at the same time. Only one blowing member 3 is required. Compared with the prior art, it can greatly reduce the size of the wireless charger and improve the heat dissipation effect of the charging device 100, and the cost is low.

[0063] Specifically, the direction of the airflow blown out by the axial flow fan is parallel to the semiconductor cooling plate 2 .

[0064] It should be noted that when the wireless charger is used in a vehicle or aircraft, in order to facilitate charging for the driver and passengers and improve the aesthetics, the shell 1 is usually embedded in the operating table of the vehicle cabin or cabin, and only the side of the shell 1 facing the charging device 100 is exposed.

[0065] Furthermore, the second air outlet 15 is located on the side of the housing 1 facing the charging device 100 , thereby preventing high-temperature air from being discharged into the inner space of the operating table and not affecting the heat dissipation of the wireless charger.

[0066] Optionally, the shell 1 further includes a fixing portion 181, which is used to be fixedly connected to a cabin of a vehicle or aircraft, thereby facilitating the application of the wireless charger to the vehicle or aircraft and facilitating the assembly of the shell 1 with the cabin of the vehicle or aircraft.

[0067] Specifically, the fixing portion 181 is a fixing ear disposed on both sides of the housing 1 , and the fixing ear can be fixedly connected to the cabin of a vehicle or aircraft by fasteners such as bolts.

[0068] Optionally, the housing 1 is further provided with a wind shielding structure 182 , which is arranged around the outside of the second air outlet 15 , thereby further preventing the high-temperature air blown out of the second air outlet 15 from contacting the charging device 100 and does not affect the heat dissipation of the charging device 100 .

[0069] Specifically, the wind shielding structure 182 is a shielding platform protruding from the shell 1 .

[0070] Optionally, the shell 1 is also provided with a positioning structure 183 corresponding to the charging device 100. When the charging device 100 abuts against the positioning structure 183, the wireless receiving coil assembly is directly opposite to the first air outlet 14, thereby facilitating the wireless receiving coil assembly of the charging device 100 to quickly align with the first air outlet 14 and the wireless transmitting coil assembly 4.

[0071] Specifically, the positioning structure 183 is a positioning protrusion provided on the side of the housing 1 facing the charging device 100 , and has a simple structure and is easy to manufacture.

[0072] Optionally, the wireless charger also includes a first heat sink 81, which is fixed to the low-temperature side of the semiconductor refrigeration plate 2, thereby improving the heat exchange efficiency between the low-temperature side of the semiconductor refrigeration plate 2 and the air in the first cavity 11, which is beneficial to improving the heat dissipation efficiency of the charging device 100.

[0073] Optionally, the wireless charger also includes a second heat sink 82, which is fixedly mounted on the high-temperature side of the semiconductor refrigeration plate 2, thereby improving the heat exchange efficiency between the high-temperature side of the semiconductor refrigeration plate 2 and the air in the first cavity 11, avoiding heat accumulation on the high-temperature side of the semiconductor refrigeration plate 2 and affecting the operation of the semiconductor refrigeration plate 2, and even causing damage to the semiconductor refrigeration plate 2, thereby protecting the semiconductor refrigeration plate 2.

[0074] Optionally, a first insulating heat-conductive material is provided between the first heat sink 81 and the low-temperature side of the semiconductor refrigeration plate 2 to improve the heat exchange efficiency between the first heat sink 81 and the low-temperature side of the semiconductor refrigeration plate 2 and ensure insulation.

[0075] Optionally, a second insulating heat-conductive material is provided between the second heat sink 82 and the high-temperature side of the semiconductor refrigeration plate 2 to improve the heat exchange efficiency between the second heat sink 82 and the high-temperature side of the semiconductor refrigeration plate 2 and ensure insulation.

[0076] Exemplarily, the first insulating heat-conducting material is thermally conductive silicone grease. The second insulating heat-conducting material is thermally conductive silicone grease.

[0077] Optionally, the first heat sink 81 includes a first plate 811 and at least one first fin 812, the first plate 811 includes a first plate surface and a second plate surface arranged opposite to each other along its thickness direction, the first plate surface is fixedly connected to the low-temperature side of the semiconductor refrigeration plate 2; the first fins 812 are fixedly arranged on the second plate surface, thereby increasing the contact area between the first heat sink 81 and the low-temperature side of the semiconductor refrigeration plate 2, as well as the contact area between the first heat sink 81 and the air in the first cavity 11, thereby improving the heat exchange efficiency.

[0078] Furthermore, the first fin 812 is parallel to the direction of the airflow blown out by the blowing member 3 , so that the first fin 812 does not affect the flow rate of the airflow, which is beneficial to ensure the heat dissipation efficiency of the charging device 100 .

[0079] Furthermore, the first fin 812 does not contact the inner wall of the first cavity 11, and thus does not affect the flow of air.

[0080] Optionally, a plurality of first fins 812 are provided, and the plurality of first fins 812 are spaced apart along a first direction; the first direction is perpendicular to the thickness direction of the semiconductor refrigeration plate 2; the plurality of first fins 812 include a first long fin 8121 and a first short fin 8122, and along the first direction, the first long fin 8121 is closer to the first channel 12 than the first short fin 8122; along the thickness direction of the semiconductor refrigeration plate 2, the length of the first long fin 8121 is greater than the length of the first short fin 8122, thereby facilitating the rapid entry of low-temperature air into the first channel 12.

[0081] Optionally, the second heat sink 82 includes a second plate 821 and at least one second fin 822, the second plate 821 includes a plate surface one and a plate surface two that are arranged opposite to each other along its thickness direction, the plate surface one is fixedly connected to the high-temperature side of the semiconductor refrigeration plate 2; the second fins 822 are all fixedly arranged on the plate surface two, thereby increasing the contact area between the second heat sink 82 and the high-temperature side of the semiconductor refrigeration plate 2, as well as the contact area between the second heat sink 82 and the air in the first cavity 11, thereby improving the heat exchange efficiency.

[0082] Furthermore, the second fins 822 are parallel to the direction of the air flow blown out by the blowing member 3 , so that the second fins 822 will not affect the flow rate of the air flow, which is beneficial to ensure the heat dissipation efficiency of the semiconductor refrigeration plate 2 .

[0083] Furthermore, the second fin 822 does not contact the inner wall of the first cavity 11, and thus does not affect the flow of air.

[0084] Optionally, a plurality of second fins 822 are provided, and the plurality of second fins 822 are spaced apart along the first direction; the plurality of second fins 822 include a second long fin 8221 and a second short fin 8222, and along the first direction, the second long fin 8221 is closer to the second channel 13 than the second short fin 8222; along the thickness direction of the semiconductor refrigeration plate 2, the length of the second long fin 8221 is greater than the length of the second short fin 8222, thereby facilitating the rapid entry of high-temperature air into the second channel 13.

[0085] It should be noted that since the thickness of the semiconductor refrigeration sheet 2 is relatively small, the distance between the surface on the low-temperature side and the surface on the high-temperature side of the semiconductor refrigeration sheet 2 is relatively close, and the low-temperature side and the high-temperature side of the semiconductor refrigeration sheet 2 can easily exchange heat through the air nearby, thereby increasing the cooling loss of the semiconductor refrigeration sheet 2.

[0086] Furthermore, the wireless charger also includes a thermal insulation member 9, which is sandwiched between the first heat sink 81 and the second heat sink 82, and the thermal insulation member 9 is arranged around the semiconductor refrigeration sheet 2 in the thickness direction and around the outside of the semiconductor refrigeration sheet 2. The thermal insulation member 9 can then be used to isolate the low-temperature side and the high-temperature side of the semiconductor refrigeration sheet 2, as well as the first heat sink 81 and the second heat sink 82, thereby reducing the heat exchange between the low-temperature side and the high-temperature side of the semiconductor refrigeration sheet 2, and between the first heat sink 81 and the second heat sink 82, thereby improving the working efficiency of the semiconductor refrigeration sheet and reducing energy consumption.

[0087] Optionally, the thermal insulation member 9 separates the first cavity 11 into a first sub-cavity 111 and a second sub-cavity 112 which are not connected to each other, the first channel 12 is connected to the first sub-cavity 111, and the second channel 13 is connected to the second sub-cavity 112, thereby further reducing the heat exchange between the low-temperature side and the high-temperature side of the semiconductor refrigeration plate 2, and between the first heat sink 81 and the second heat sink 82. At the same time, the low-temperature air formed by heat exchange with the low-temperature side of the semiconductor refrigeration plate 2 can enter the first channel 12 as much as possible, thereby improving the heat dissipation efficiency of the charging device 100, and the high-temperature air formed by heat exchange with the high-temperature side of the semiconductor refrigeration plate 2 can enter the second channel 13 as much as possible, thereby improving the heat dissipation efficiency of the semiconductor refrigeration element.

[0088] Optionally, the wireless charger also includes a first temperature detection component, which is used to detect the temperature of the wireless transmitting coil assembly 4; the circuit board 6 is communicatively connected to the first temperature detection component, and when the first temperature detection component measures that the temperature of the wireless transmitting coil assembly 4 exceeds the temperature threshold of the wireless transmitting coil assembly 4, the power of the wireless transmitting coil assembly 4 can be controlled to be reduced through the circuit board 6 until charging is stopped, so as to improve safety.

[0089] Optionally, the wireless charger also includes a second temperature detection device, which is used to detect the temperature of the high temperature side of the semiconductor refrigeration chip 2; the circuit board 6 is communicatively connected to the second temperature detection device, and when the second temperature detection device measures that the temperature of the high temperature side of the semiconductor refrigeration chip 2 exceeds the temperature threshold of the high temperature side of the semiconductor refrigeration chip 2, the power of the wireless transmitting coil assembly 4 is controlled to be reduced through the circuit board 6 until charging is stopped to improve safety.

[0090] Optionally, the wireless charger also includes a third temperature detection component, which is used to detect the temperature of the low-temperature side of the semiconductor refrigeration chip 2; the circuit board 6 is communicatively connected to the third temperature detection component, and when the third temperature detection component measures that the temperature of the low-temperature side of the semiconductor refrigeration chip 2 exceeds the temperature threshold of the low-temperature side of the semiconductor refrigeration chip 2, the power of the wireless transmitting coil assembly 4 is controlled to be reduced through the circuit board 6 until charging is stopped to improve safety.

[0091] It should be noted that the temperature threshold of the wireless transmitting coil assembly 3, the temperature threshold of the high temperature side of the semiconductor refrigeration plate 4 and the temperature threshold of the low temperature side of the semiconductor refrigeration plate 4 are known values ​​and can be determined based on multiple repeated tests.

[0092] Exemplarily, the first temperature detection component is integrated into the shielding component 5, and the first temperature detection component is located on the shielding component 5 near the wireless transmitting coil assembly 4. The second temperature detection component is fixed in the first cavity, and the detection end of the second temperature detection component passes through the thermal insulation component 9 and is located on the high temperature side of the semiconductor cooling plate 4. The third temperature detection component is fixed in the first cavity, and the detection end of the third temperature detection component passes through the thermal insulation component 9 and is located on the low temperature side of the semiconductor cooling plate 4.

[0093] Exemplarily, the first temperature detecting element, the second temperature detecting element and the third temperature detecting element are all temperature sensors.

[0094] Optionally, the housing 1 includes a face shell 1a, a connection shell 1b, a first cover plate 1c1, and a second cover plate 1c2. The first cavity 11 is provided on the connection shell 1b; a first groove 1b1 and a second groove 1b2 are provided on one side of the connection shell 1b, both of which are connected to the first cavity 11; a first air outlet 14 is provided on the side of the face shell 1a facing the charging device 100, and a side of the face shell 1a facing away from the charging device 100 is fixedly connected to the connection shell 1b; the first cover plate 1c1 is provided with an air outlet hole 1c11 corresponding to the first air outlet 14, and the first cover plate 1c1 covers the notch of the first groove 1b1 to form a first channel 12; the second cover plate 1c2 is provided with an air outlet hole 1c21 corresponding to the second air outlet 15, and the second cover plate 1c2 covers the notch of the second groove 1b2 to form a second channel 13. Such a configuration facilitates the formation of the first channel 12 and the second channel 13, and facilitates the manufacture of the housing 1.

[0095] Furthermore, the first cover plate 1c1 is also provided with a boss 1c12 surrounding the outside of the air outlet 1c11, so that the central hole 43 of the wireless transmitting coil assembly 4 can be sleeved on the outside of the boss 1c12 to fix the wireless transmitting coil. At the same time, the end of the boss 1c12 away from the first cover plate 1c1 abuts against the shielding member 5, thereby ensuring that the low-temperature airflow discharged from the first channel 12 will not leak when passing through the air outlet 1c11.

[0096] Furthermore, the side of the shielding member 5 facing away from the wireless transmitting coil assembly 4 abuts against the surface shell 1 a, thereby ensuring that the low-temperature airflow will not leak when passing through the avoidance through hole 51 .

[0097] Of course, in other embodiments, the avoidance through hole 51 of the shielding member 5 can be sleeved on the outer side of the boss 1c12, and the side of the boss 1c12 away from the first cover plate 1c1 can be abutted against the surface shell 1a, which can also avoid leakage of low-temperature airflow.

[0098] Furthermore, the second cover plate 1c2 abuts against the surface shell 1a, thereby ensuring that the low-temperature airflow discharged from the second channel 13 will not leak when passing through the second air outlet hole 1c21.

[0099] It should be noted that this embodiment does not limit the shapes of the air outlet hole 1c11 and the air outlet hole 2 1c21.

[0100] Exemplarily, the air outlet hole 1c11 and the air outlet hole 2 1c21 are both rectangular. In other embodiments, the air outlet hole 1c11 and the air outlet hole 2 1c21 can also be circular.

[0101] Preferably, the shapes of the air outlet 1c11, the central hole 43 of the wireless charging transmitting coil assembly and the avoidance through hole 51 of the shielding member 5 are the same, which is beneficial to improving the installation convenience and stability of the wireless charging transmitting coil assembly and the shielding member 5.

[0102] Optionally, the connection shell 1b is provided with a limiting structure corresponding to the wireless charging coil assembly, and the limiting structure is used to prevent the wireless charging coil assembly from moving relative to the connection shell 1b.

[0103] Specifically, the connecting shell 1b is provided with a first limiting groove 1b3, and the wireless charging transmitting coil assembly is fixed in the first limiting groove 1b3, and then the wireless charging coil assembly can be clamped by the side wall of the first limiting groove 1b3 to prevent the wireless charging coil assembly from moving relative to the connecting shell 1b.

[0104] Exemplarily, the ferrite 41 of the wireless charging transmitting coil assembly is fixed in the first limiting groove 1b3 by double-sided tape.

[0105] Specifically, the connecting shell 1b is further provided with a second limiting groove 1b4, and the shielding member 5 is fixedly disposed in the second limiting groove 1b4.

[0106] Furthermore, the connecting shell 1b is fixedly connected to the surface shell 1a, so that the notch of the first limiting groove 1b3 and the notch of the second limiting groove 1b4 are closed by the surface shell 1a to form a second cavity 16.

[0107] Furthermore, the connection shell 1b is made of plastic and has good insulation properties.

[0108] Optionally, the shell 1 also includes a bottom shell 1d, which is fixed to one side of the connecting shell 1b; the bottom shell 1d is sleeved on the outside of the blowing piece 3, and the bottom shell 1d is provided with an air inlet 1d1 corresponding to the blowing piece 3, thereby protecting the blowing piece 3 through the bottom shell 1d and improving the aesthetics of the wireless charger.

[0109] Optionally, a third cavity 17 is formed between the bottom shell 1d and the connecting shell 1b, and the circuit board 6 is located in the third cavity 17. The bottom shell 1d is made of metal material, and the heat dissipation efficiency of the circuit board 6 can be improved by the metal bottom shell 1d, thereby improving the reliability of the circuit board 6.

[0110] Optionally, the first cavity 11 is provided with a first opening and a second opening on both sides thereof, the housing 1 further comprises a third cover plate 1c3, the third cover plate 1c3 is covered on the first opening to close the first opening; the blowing member 3 is fixed on the second opening. Such a configuration facilitates the molding of the first cavity 11 and facilitates the assembly of the semiconductor cooling sheet 2, the first heat sink 81 and the second heat sink 82.

[0111] In this embodiment, the first opening, the first groove 1b1 and the second groove 1b2 are all located on the side of the connecting shell 1b facing the surface shell 1a, and the first cover plate 1c1, the second cover plate 1c2 and the third cover plate 1c3 are integrally formed to improve the processability of the connecting shell 1b, facilitate assembly, and improve the sealing performance of the first cavity 11, the first channel 12 and the second channel 13.

[0112] Furthermore, the surface shell 1a and the bottom shell 1d are respectively connected to the two sides of the connecting shell 1b along the axial direction of the axial flow fan, and the volume of the wireless charger is smaller, meeting the lightweight requirements.

[0113] Optionally, the shell 1 is further provided with a flange 1a1, so that it is easy to match with the cabin of a vehicle or aircraft through the flange 1a1 to improve the aesthetics. Exemplarily, flanges 1a1 are provided at both ends of the surface shell 1a. It should be noted that the size and shape of the flanges 1a1 at both ends of the surface shell 1a can be selected according to specific needs and are not limited here.

[0114] Optionally, the housing 1a is further provided with a receiving slot 1a2 for receiving the charging device 100, and the first air outlet 14, the second air outlet 15 and the positioning structure 183 are all provided in the receiving slot 1a2. When the charging device 100 needs to be charged, the charging device 100 is placed in the receiving slot 1a2 to avoid displacement of the charging device 100 during the charging process and ensure charging efficiency.

[0115] In this embodiment, the second air outlet 15 is located at one end of the accommodating groove 1a2, and the wind shielding structure 182 is a C-shaped baffle. Both ends of the C-shaped baffle are connected to the side walls of the accommodating groove 1a2, so that the purpose of wind shielding can be achieved with the help of a part of the side wall of the accommodating groove 1a2, which has the effect of simplifying the wind shielding structure 182 and improving the processability of the shell 1.

[0116] Exemplarily, the working principle of the wireless charger of this embodiment is:

[0117] When the wireless charger is working, current passes through the semiconductor cooling sheet 2, so that heat is transferred from one side of the semiconductor cooling sheet 2 to the other side, that is, the temperature of one side of the semiconductor cooling sheet 2 is high and the temperature of the other side is low. Specifically, the low temperature side of the conductor cooling sheet 2 will reduce the temperature of the first heat sink 81, and the high temperature side of the conductor cooling sheet 2 will increase the temperature of the second heat sink 82.

[0118] The axial flow fan draws air from the environment into the first cavity 11, and forms two airflows on both sides of the semiconductor refrigeration plate 2, one of which exchanges heat with the first heat sink 81 to form a low-temperature airflow and enters the first channel 12, and then the low-temperature airflow passes through the air outlet 1c11 and the avoidance hole 51 of the shielding member 5 in turn, and is discharged from the first air outlet 14, and is directly blown to the back of the charging device 100 facing the wireless receiving coil, so as to achieve the purpose of quickly cooling the charging device 100.

[0119] At the same time, another airflow exchanges heat with the second heat sink 82 to form a high-temperature airflow and enters the second channel 13. Then, the high-temperature airflow passes through the second air outlet 1c21 and is discharged from the second air outlet 15. The wind shielding structure 182 can prevent the high-temperature airflow from contacting the charging device 100 and will not affect the heat dissipation effect of the charging device 100.

[0120] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A wireless charger, characterized in that: include: A shell (1), the shell (1) comprising a first cavity (11), a first channel (12), a second channel (13), a first air outlet (14) and a second air outlet (15), the first air outlet (14) being located on a side of the shell (1) facing a charging device (100), the first air outlet (14) being arranged opposite to a wireless receiving coil assembly of the charging device (100), and the second air outlet (15) being arranged offset from the charging device (100); A semiconductor refrigeration sheet (2), wherein the semiconductor refrigeration sheet (2) is arranged in the first cavity (11), one end of the first channel (12) is arranged opposite to the low-temperature side of the semiconductor refrigeration sheet (2) and is connected to the first cavity (11), and the other end is connected to the first air outlet (14); one end of the second channel (13) is arranged opposite to the high-temperature side of the semiconductor refrigeration sheet (2) and is connected to the first cavity (11), and the other end is connected to the second air outlet (15); A blowing member (3), wherein the blowing member (3) is used for blowing air toward the first cavity (11).

2. The wireless charger according to claim 1, characterized in that: The wireless charger further comprises a wireless transmitting coil assembly (4), the housing (1) further comprises a second cavity (16), and the wireless transmitting coil assembly (4) is fixedly disposed in the second cavity (16); The wireless transmitting coil assembly (4) is provided with a central hole (43), and the central hole (43) is sleeved on the outer side of the other end of the first channel (12).

3. The wireless charger according to claim 2, characterized in that: The wireless charger further comprises a shielding component (5), wherein the shielding component (5) is fixedly arranged on a side of the wireless transmitting coil component (4) facing the wireless receiving coil component; The shielding member (5) is provided with an avoidance through hole (51), and the avoidance through hole (51) is sleeved on the outer side of the other end of the first channel (12).

4. The wireless charger according to claim 2, characterized in that: The wireless charger also includes: A circuit board (6), wherein the circuit board (6) is fixedly arranged in the housing (1), and the wireless transmitting coil assembly (4), the semiconductor cooling sheet (2) and the blowing element (3) are all communicatively connected to the circuit board (6); a first temperature detection element, the first temperature detection element being used to detect the temperature of the wireless transmitting coil assembly (4), the first temperature detection element being communicatively connected to the circuit board (6); and / or, a second temperature detection element, the second temperature detection element being used to detect the temperature of the high temperature side of the semiconductor refrigeration plate (2), the second temperature detection element being communicatively connected to the circuit board (6); and / or, A third temperature detection component, the third temperature detection component is used to detect the temperature of the low-temperature side of the semiconductor refrigeration plate (2), and the third temperature detection component is communicatively connected to the circuit board (6).

5. The wireless charger according to claim 1, characterized in that: The wireless charger further comprises a first heat sink (81), wherein the first heat sink (81) is fixedly arranged on the low temperature side of the semiconductor refrigeration sheet (2); and / or, The wireless charger also includes a second heat sink (82), which is fixedly arranged on the high-temperature side of the semiconductor cooling plate (2).

6. The wireless charger according to claim 5, characterized in that: The wireless charger further comprises a heat insulating member (9), wherein the heat insulating member (9) is sandwiched between the first heat dissipation member (81) and the second heat dissipation member (82), and the heat insulating member (9) is arranged around the semiconductor cooling sheet (2) in the thickness direction and on the outside of the semiconductor cooling sheet (2).

7. The wireless charger according to claim 6, characterized in that: The thermal insulation component (9) separates the first cavity (11) into a first sub-cavity (111) and a second sub-cavity (112) which are not connected to each other; the first channel (12) is connected to the first sub-cavity (111); and the second channel (13) is connected to the second sub-cavity (112).

8. The wireless charger according to claim 1, characterized in that: The second air outlet (15) is located on a side of the housing (1) facing the charging device (100).

9. The wireless charger according to claim 8, characterized in that: The housing (1) is further provided with a wind shielding structure (182), and the wind shielding structure (182) is arranged around the outside of the second air outlet (15).

10. The wireless charger according to claim 1, characterized in that: The housing (1) is also provided with a positioning structure (183); when the charging device (100) is in contact with the positioning structure (183), the wireless receiving coil assembly is directly opposite to the first air outlet (14).

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