Wireless charger

Abstract

The utility model discloses a wireless charger, and belongs to the technical field of wireless charging. According to the wireless charger provided by the utility model, 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 blowing piece, and finally the low-temperature air is blown out through the first air outlet; the first air outlet is arranged opposite to the wireless receiving coil assembly of the charging equipment, so that 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 utility model relates to wireless charging technical field especially relates to a wireless charger. BACKGROUND

[0002] With the popularity of wireless charging technology, more and more mobile phone brands adopt wireless charging function, and the power level of wireless charging is also higher and higher.

[0003] The wireless charging receiving coil of the mobile phone is mainly on the back of the mobile phone, close to one side of the shell, and 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 experiencing high-power charging, the heat generation of the receiving coil will rapidly increase, 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. When designing the mobile phone, this has been taken into account, and many mobile phone back covers are made of glass, ceramic or other materials with good heat dissipation performance. After the heat is conducted to the back cover, it can be dissipated through the back cover. However, when the temperature of the back cover and the environment reaches thermal equilibrium, the heat dissipation speed of the mobile phone will decrease.

[0004] 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 for the purpose of ensuring the safety of the lithium battery, and then forcibly reduce the wireless charging power. When the temperature of the battery and the coil decreases too slowly, it will also cause the interruption of the wireless charging process. The time span from 0% to 100% of the battery capacity of the entire mobile phone will be lengthened, affecting the user experience.

[0005] At present, the main heat dissipation scheme of the vehicle-mounted wireless charger is to blow natural wind to the back of the mobile phone by the heat dissipation fan, and rely on air convection to cool the mobile phone. Restricted by factors such as fan size, fan noise, air duct design, etc., the fan air flow, fan outlet pressure, etc. are relatively small, and the wind pressure loss of the air blown to the back of the mobile phone is large, the heat dissipation effect is general, and the experience is very poor. UTILITY MODEL CONTENTS

[0006] The utility model aims at providing a wireless charger which can improve the heat dissipation effect of the charging equipment and improve the user experience.

[0007] To achieve the above-mentioned purpose, the following technical scheme is provided:

[0008] The wireless charger comprises:

[0009] A shell comprises a first cavity, a first channel, a second channel, a first air outlet and a second air outlet, the first air outlet is located on a side of the shell facing a charging device, the first air outlet is arranged opposite to a wireless receiving coil assembly of the charging device, and the second air outlet is arranged staggered with the charging device;

[0010] A semiconductor refrigeration piece is arranged in the first cavity, one end of the first channel is arranged opposite to a low-temperature side of the semiconductor refrigeration piece and communicates with the first cavity, the other end communicates with the first air outlet, one end of the second channel is arranged opposite to a high-temperature side of the semiconductor refrigeration piece and communicates with the first cavity, and the other end communicates with the second air outlet;

[0011] A blowing piece is arranged for blowing air to the first cavity.

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

[0013] The wireless transmitting coil assembly is provided with a center hole, and the center hole is arranged outside the other end of the first channel.

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

[0015] The shielding piece is provided with an avoiding through hole, and the avoiding through hole is arranged outside the other end of the first channel.

[0016] As a preferred technical solution of the above wireless charger, the wireless charger further comprises:

[0017] A circuit board is fixedly arranged in the shell, and the wireless transmitting coil assembly, the semiconductor refrigeration piece and the blowing piece are in communication connection with the circuit board;

[0018] A first temperature detection piece is arranged for detecting the temperature of the wireless transmitting coil assembly, and the first temperature detection piece is in communication connection with the circuit board; and / or,

[0019] A second temperature detection piece is arranged for detecting the temperature of the high-temperature side of the semiconductor refrigeration piece, and the second temperature detection piece is in communication connection with the circuit board; and / or,

[0020] A third temperature detection member is used for detecting the temperature of the low-temperature side of the semiconductor refrigeration sheet, and is in communication connection with the circuit board.

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

[0022] The wireless charger further comprises a second heat dissipation member, which is fixedly arranged on the high-temperature side of the semiconductor refrigeration sheet.

[0023] As a preferred technical scheme of the wireless charger, the wireless charger further comprises a heat insulation member, which is arranged between the first heat dissipation member and the second heat dissipation member, and is arranged outside the semiconductor refrigeration sheet in the thickness direction of the semiconductor refrigeration sheet.

[0024] As a preferred technical scheme of the wireless charger, the heat insulation member separates the first cavity into a first sub-cavity and a second sub-cavity, which are not communicated with each other, the first channel is communicated with the first sub-cavity, and the second channel is communicated with the second sub-cavity.

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

[0026] As a preferred technical scheme of the wireless charger, the shell further comprises a wind blocking structure, which is arranged outside the second air outlet.

[0027] As a preferred technical scheme of the wireless charger, the shell further comprises a positioning structure, when the charging device abuts against the positioning structure, the wireless receiving coil assembly is opposite to the first air outlet.

[0028] Compared with the prior art, the utility model has the advantages of:

[0029] The utility model discloses a wireless charger, the low temperature side of semiconductor refrigeration piece can make the air in the first cavity cooling down when semiconductor refrigeration piece works, then low temperature air is sent to the first channel through the blower piece, and low temperature air is finally blown out through the first air outlet, since the first air outlet and the wireless receiving coil assembly of charging equipment are opposite arrangement, can greatly improve the cooling speed of wireless receiving coil assembly, and the heat dissipation effect is improved, simultaneously, the air in the first cavity that is heated by the high temperature side of semiconductor refrigeration piece is also sent to the second channel through the blower piece to make high temperature air exhaust through the second air outlet, then the semiconductor refrigeration piece is cooled down, and the high temperature air is avoided to stay in the shell, leads to the temperature rise of wireless charger, and the second air outlet and charging equipment are staggered arrangement, still have the effect of further improving the heat dissipation of charging equipment. BRIEF DESCRIPTION OF DRAWINGS

[0030] Figure 1 It is structure schematic diagram of wireless charger and charging equipment in the utility model embodiment;

[0031] Figure 2 It is structure schematic diagram of wireless charger in the utility model embodiment;

[0032] Figure 3 It is sectional view of wireless charger in the utility model embodiment;

[0033] Figure 4 It is explosion drawing of wireless charger in the utility model embodiment;

[0034] Figure 5 It is structure schematic diagram of connecting shell and shielding piece in the utility model embodiment;

[0035] Figure 6 It is structure schematic diagram of connecting shell and wireless transmitting coil assembly in the utility model embodiment;

[0036] Figure 7 It is explosion drawing of connecting shell and first cover plate, second cover plate and third cover plate in the utility model embodiment;

[0037] Figure 8 It is Figure 7 The enlarged view of A of

[0038] Reference signs:

[0039] 100, charging device; 1, shell; 1a, face shell; 1a1, flange; 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 hole one; 1c12, boss; 1c2, second cover plate; 1c21, air outlet hole two; 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; 16, second cavity; 17, third cavity; 181, fixed part; 182, wind blocking structure; 183, positioning structure; 2, semiconductor refrigeration sheet; 3, blowing piece; 4, wireless transmitting coil assembly; 41, ferrite; 42, transmitting coil body; 43, center hole; 5, shielding piece; 51, avoiding through hole; 6, circuit board; 81, first heat dissipation piece; 811, first plate; 812, first fin; 8121, first long fin; 8122, first short fin; 82, second heat dissipation piece; 821, second plate; 822, second fin; 8221, second long fin; 8222, second short fin; 9, heat insulation piece. DETAILED DESCRIPTION

[0040] To make the objectives, technical solutions, and superiorities of the embodiments of the present application clearer, the following will be a clear and complete description of the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, instead of all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0042] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0043] In the description of the utility model, it needs to explain, the term "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or position relation is based on the orientation or position relation shown in the drawing, or it is the orientation or position relation that the utility model product uses usually, only is for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, constructs and operates with a particular orientation, therefore can not be understood as the limitation to the utility model. In addition, the term "first", "second", "third" and so on are only used for distinguishing description, and can not be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more than two.

[0044] In the description of the utility model, it also needs to explain that, unless otherwise specified and limited, the term "set", "connect" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected, can be mechanically connected, or electrically connected. For ordinary skilled in the art, the specific meaning of the above-mentioned terms in the utility model can be understood according to the specific circumstances.

[0045] In the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature in the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature in the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "lower", "lower" and "lower" of the first feature in the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0046] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and can not be understood as the limitation of the utility model.

[0047] As Figures 1-8As shown, the embodiment provides a wireless charger, which comprises a shell 1, a semiconductor refrigeration sheet 2 and a blowing piece 3. The shell 1 comprises 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. The second air outlet 15 is arranged 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 communicates with the first cavity 11. The other end of the first channel 12 communicates with 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 communicates with the first cavity 11. The other end of the second channel 13 communicates with the second air outlet 15. The blowing piece 3 is used for blowing air to the first cavity 11.

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

[0049] The low-temperature side of the semiconductor refrigeration sheet 2 can cool the air around it. The low-temperature air will enter the first channel 12 under the blowing of the blowing piece 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 improved, and the heat dissipation effect is improved.

[0050] Meanwhile, the high-temperature side of the semiconductor refrigeration sheet 2 can heat the air around it. The high-temperature air will enter the second channel 13 under the blowing of the blowing piece 3 and finally be blown out through the second air outlet 15. Thus, the semiconductor refrigeration sheet 2 is cooled, and the high-temperature air is prevented from remaining in the shell 1, so as to avoid the temperature rise of the wireless charger. Since the second air outlet 15 is arranged 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 opposite to the wireless receiving coil assembly of the charging device 100. That is to say, along the axial direction of the first air outlet 14, the orthographic projection of the first air outlet 14 is located in the orthographic projection of the wireless receiving coil assembly of the charging device 100. Thus, all the air flow blown out by the first air outlet 14 can contact the position where the wireless receiving coil assembly of the charging device 100 is arranged, so as to improve the utilization rate of the low-temperature air flow and achieve better cooling effect.

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

[0053] Preferably, one end of the first channel 12 is arranged opposite to the low-temperature side of the semiconductor refrigeration sheet 2, in other words, along the thickness direction of the semiconductor refrigeration sheet 2, the orthographic projection of the opening of the one end of the first channel 12 communicated with the first cavity 11 is located in the orthographic projection of the semiconductor refrigeration sheet 2, so as to facilitate the low-temperature air to quickly enter 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 sheet 2, in other words, along the thickness direction of the semiconductor refrigeration sheet 2, the orthographic projection of the opening of the one end of the second channel 13 communicated with the first cavity 11 is located in the orthographic projection of the semiconductor refrigeration sheet 2, so as to facilitate the high-temperature air to quickly enter the first channel 12.

[0055] It should be noted that the shape of the first air outlet 14 and the second air outlet 15 is not limited in the embodiment. For example, the first air outlet 14 includes a plurality of first through holes arranged at intervals. The second air outlet 15 includes a plurality of second through holes arranged at intervals.

[0056] Further, the wireless charger further includes a wireless transmitting coil assembly 4, and the shell 1 further includes a second cavity 16, and the wireless transmitting coil assembly 4 is fixedly arranged in the second cavity 16; the wireless transmitting coil assembly 4 is provided with a center hole 43, and the center hole 43 is arranged outside the other end of the first channel 12, thereby leaving space for the first air duct, and 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 with the ferrite 41, and the transmitting coil body 42 itself has a center hole, thereby only a center hole needs to be arranged on the ferrite 41, and compared with the wireless transmitting coil assembly 4 in the prior art, the change is small and easy to operate.

[0058] It should be noted that the specification of the transmitting coil body 42 is not limited in the embodiment. For example, the transmitting coil body 42 can be set according to the MP-A13 inductance and size in the Qi protocol (i.e. the "wireless charging" standard proposed by the Wireless Power Consortium).

[0059] Further, the wireless charger further includes a shielding piece 5, and the shielding piece 5 is fixedly arranged on the side of the wireless transmitting coil assembly 4 facing the wireless receiving coil assembly; the shielding piece 5 is provided with an avoiding through hole 51, and the avoiding through hole 51 is arranged outside 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] Further, the wireless charger further includes an NFC antenna, and the NFC antenna is integrated in the shielding piece 5, which has high integration degree, is easy to assemble, and is also conducive to reducing the volume of the wireless charger.

[0061] Further, the wireless charger further comprises a circuit board 6, the shell 1 further comprises a third cavity 17, the circuit board 6 is fixedly arranged in the third cavity 17, and the semiconductor refrigeration piece 2, the blowing piece 3, the wireless transmitting coil assembly 4 and the NFC antenna are all in communication connection with the circuit board 6. The connection relationship and working principle between the circuit board 6 and the semiconductor refrigeration piece 2, the blowing piece 3, the wireless transmitting coil assembly 4 and the NFC antenna are all prior art, and will not be described here.

[0062] Optionally, the blowing piece 3 is an axial flow fan, which can blow air to the low-temperature side and the high-temperature side of the semiconductor refrigeration piece 2 at the same time, and only one blowing piece 3 is needed, which can greatly reduce the volume of the wireless charger and improve the heat dissipation effect of the charging device 100, and the cost is low.

[0063] Specifically, the airflow direction of the axial flow fan is parallel to the semiconductor refrigeration piece 2.

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

[0065] Further, the second air outlet 15 is located on the side of the shell 1 facing the charging device 100, so that the high-temperature air can be prevented from being discharged to the internal space of the operating table, and the heat dissipation of the wireless charger will not be affected.

[0066] Optionally, the shell 1 further comprises a fixing portion 181, and the fixing portion 181 is used for fixedly connecting with the cabin body of the vehicle or the aircraft, so as to facilitate the application of the wireless charger to the vehicle or the aircraft, and facilitate the assembly of the shell 1 and the cabin body of the vehicle or the aircraft.

[0067] Specifically, the fixing portion 181 is a fixing lug arranged on both sides of the shell 1, and the fixing lug can be fixedly connected with the cabin body of the vehicle or the aircraft through bolts or other fasteners.

[0068] Optionally, the shell 1 is further provided with a wind shielding structure 182, and the wind shielding structure 182 is arranged outside the second air outlet 15, so as to further prevent the high-temperature air blown out by the second air outlet 15 from contacting the charging device 100, and the heat dissipation of the charging device 100 will not be affected.

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

[0070] Optionally, the shell 1 is further 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 the first air outlet 14, thereby facilitating the quick alignment of the wireless receiving coil assembly of the charging device 100 with the first air outlet 14 and the wireless transmitting coil assembly 4.

[0071] Specifically, the positioning structure 183 is a positioning protrusion arranged on the side of the shell 1 facing the charging device 100, which is simple in structure and easy to manufacture.

[0072] Optionally, the wireless charger further comprises a first heat dissipation member 81, which is fixedly arranged on the low-temperature side of the semiconductor refrigeration piece 2, thereby improving the heat exchange efficiency between the low-temperature side of the semiconductor refrigeration piece 2 and the air in the first cavity 11, and facilitating the heat dissipation efficiency of the charging device 100.

[0073] Optionally, the wireless charger further comprises a second heat dissipation member 82, which is fixedly arranged on the high-temperature side of the semiconductor refrigeration piece 2, thereby improving the heat exchange efficiency between the high-temperature side of the semiconductor refrigeration piece 2 and the air in the first cavity 11, avoiding the heat accumulation on the high-temperature side of the semiconductor refrigeration piece 2, which affects the working of the semiconductor refrigeration piece 2, and even causes the damage of the semiconductor refrigeration piece 2, thereby protecting the semiconductor refrigeration piece 2.

[0074] Optionally, a first insulating and heat-conducting material is arranged between the first heat dissipation member 81 and the low-temperature side of the semiconductor refrigeration piece 2, so as to improve the heat exchange efficiency between the first heat dissipation member 81 and the low-temperature side of the semiconductor refrigeration piece 2, and ensure the insulation.

[0075] Optionally, a second insulating and heat-conducting material is arranged between the second heat dissipation member 82 and the high-temperature side of the semiconductor refrigeration piece 2, so as to improve the heat exchange efficiency between the second heat dissipation member 82 and the high-temperature side of the semiconductor refrigeration piece 2, and ensure the insulation.

[0076] Illustratively, the first insulating and heat-conducting material is heat-conducting silicone grease, and the second insulating and heat-conducting material is heat-conducting silicone grease.

[0077] Optionally, the first heat dissipation member 81 comprises a first plate 811 and at least one first fin 812, the first plate 811 comprises a first plate surface and a second plate surface oppositely arranged along the thickness direction of the first plate 811, and the first plate surface is fixedly connected with the low-temperature side of the semiconductor refrigeration piece 2; the first fin 812 is fixedly arranged on the second plate surface, thereby increasing the contact area between the first heat dissipation member 81 and the low-temperature side of the semiconductor refrigeration piece 2, and the contact area between the first heat dissipation member 81 and the air in the first cavity 11, and improving the heat exchange efficiency.

[0078] Further, the first fin 812 is parallel to the flow direction of the air flow blown by the blowing member 3, thereby preventing the first fin 812 from affecting the flow rate of the air flow, and facilitating the heat dissipation efficiency of the charging device 100.

[0079] Further, the first fins 812 are not in contact with the inner wall of the first cavity 11, thereby not affecting the air flow.

[0080] Optionally, the first fins 812 are provided in a plurality, and the plurality of first fins 812 are arranged at intervals along a first direction; the first direction is perpendicular to the thickness direction of the semiconductor refrigeration sheet 2; the plurality of first fins 812 include first long fins 8121 and first short fins 8122, and along the first direction, the first long fins 8121 are closer to the first channel 12 than the first short fins 8122; along the thickness direction of the semiconductor refrigeration sheet 2, the length of the first long fins 8121 is greater than the length of the first short fins 8122, thereby facilitating the low-temperature air to quickly enter the first channel 12.

[0081] Optionally, the second heat dissipation member 82 includes a second plate 821 and at least one second fin 822, the second plate 821 includes a plate face one and a plate face two oppositely arranged along the thickness direction thereof, and the plate face one is fixedly connected with the high-temperature side of the semiconductor refrigeration sheet 2; the second fin 822 is fixedly arranged on the plate face two, thereby increasing the contact area of the second heat dissipation member 82 with the high-temperature side of the semiconductor refrigeration sheet 2 and the contact area of the second heat dissipation member 82 with the air in the first cavity 11, and improving the heat exchange efficiency.

[0082] Further, the second fins 822 are parallel to the flow direction of the air blown by the air blower 3, thereby preventing the second fins 822 from affecting the flow rate of the air, and facilitating to ensure the heat dissipation efficiency of the semiconductor refrigeration sheet 2.

[0083] Further, the second fins 822 are not in contact with the inner wall of the first cavity 11, thereby not affecting the air flow.

[0084] Optionally, the second fins 822 are provided in a plurality, and the plurality of second fins 822 are arranged at intervals along the first direction; the plurality of second fins 822 include second long fins 8221 and second short fins 8222, and along the first direction, the second long fins 8221 are closer to the second channel 13 than the second short fins 8222; along the thickness direction of the semiconductor refrigeration sheet 2, the length of the second long fins 8221 is greater than the length of the second short fins 8222, thereby facilitating the high-temperature air to quickly enter the second channel 13.

[0085] It should be noted that, since the thickness of the semiconductor refrigeration sheet 2 is small, the distance between the surface of the low-temperature side and the surface of the high-temperature side of the semiconductor refrigeration sheet 2 is close, and the low-temperature side and the high-temperature side of the semiconductor refrigeration sheet 2 are easily exchanged by the air, thereby increasing the cold loss of the semiconductor refrigeration sheet 2.

[0086] Further, the wireless charger further comprises a heat insulation piece 9, the heat insulation piece 9 is clamped between the first heat dissipation piece 81 and the second heat dissipation piece 82, and the heat insulation piece 9 is arranged outside the semiconductor refrigeration piece 2 in the thickness direction of the semiconductor refrigeration piece 2, and then the low-temperature side and the high-temperature side of the semiconductor refrigeration piece 2 and the first heat dissipation piece 81 and the second heat dissipation piece 82 can be isolated by the heat insulation piece 9, the heat exchange between the low-temperature side and the high-temperature side of the semiconductor refrigeration piece 2 and the first heat dissipation piece 81 and the second heat dissipation piece 82 is reduced, the working efficiency of the semiconductor refrigeration piece is improved, and the energy consumption is reduced.

[0087] Optionally, the heat insulation piece 9 separates the first cavity 11 into a first sub-cavity 111 and a second sub-cavity 112 which are not communicated with each other, the first channel 12 is communicated with the first sub-cavity 111, and the second channel 13 is communicated with the second sub-cavity 112, and then the heat exchange between the low-temperature side and the high-temperature side of the semiconductor refrigeration piece 2 and the first heat dissipation piece 81 and the second heat dissipation piece 82 can be further reduced, and at the same time, the low-temperature air formed by heat exchange with the low-temperature side of the semiconductor refrigeration piece 2 can enter the first channel 12 as much as possible, the heat dissipation efficiency of the charging device 100 is improved, and the high-temperature air formed by heat exchange with the high-temperature side of the semiconductor refrigeration piece 2 can enter the second channel 13 as much as possible, and the heat dissipation efficiency of the semiconductor refrigeration piece is improved.

[0088] Optionally, the wireless charger further comprises a first temperature detection piece for detecting the temperature of the wireless transmitting coil assembly 4; the circuit board 6 is in communication connection with the first temperature detection piece, and then when the first temperature detection piece detects 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 is controlled to be reduced by the circuit board 6 until the charging is stopped, so as to improve the safety.

[0089] Optionally, the wireless charger further comprises a second temperature detection piece for detecting the temperature of the high-temperature side of the semiconductor refrigeration piece 2; the circuit board 6 is in communication connection with the second temperature detection piece, and then when the second temperature detection piece detects that the temperature of the high-temperature side of the semiconductor refrigeration piece 2 exceeds the temperature threshold of the high-temperature side of the semiconductor refrigeration piece 2, the power of the wireless transmitting coil assembly 4 is controlled to be reduced by the circuit board 6 until the charging is stopped, so as to improve the safety.

[0090] Optionally, the wireless charger further comprises a third temperature detection piece for detecting the temperature of the low-temperature side of the semiconductor refrigeration piece 2; the circuit board 6 is in communication connection with the third temperature detection piece, and then when the third temperature detection piece detects that the temperature of the low-temperature side of the semiconductor refrigeration piece 2 exceeds the temperature threshold of the low-temperature side of the semiconductor refrigeration piece 2, the power of the wireless transmitting coil assembly 4 is controlled to be reduced by the circuit board 6 until the charging is stopped, so as to improve the 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 cooling sheet 4, and the temperature threshold of the low-temperature side of the semiconductor cooling sheet 4 are known values, which can be determined according to multiple repeated tests.

[0092] Exemplarily, the first temperature detection member is integrated on the shielding member 5 and is located on the shielding member 5 close to the wireless transmitting coil assembly 4. The second temperature detection member is fixedly arranged in the first cavity and the detection end of the second temperature detection member is located on the high-temperature side of the semiconductor cooling sheet 4 after penetrating through the heat insulation member 9. The third temperature detection member is fixedly arranged in the first cavity and the detection end of the third temperature detection member is located on the low-temperature side of the semiconductor cooling sheet 4 after penetrating through the heat insulation member 9.

[0093] Exemplarily, the first temperature detection member, the second temperature detection member, and the third temperature detection member are all temperature sensors.

[0094] Optionally, the shell 1 includes a face shell 1a, a connecting shell 1b, a first cover plate 1c1, and a second cover plate 1c2, and the first cavity 11 is arranged in the connecting shell 1b. One side of the connecting shell 1b is provided with a first groove 1b1 and a second groove 1b2, both of which are in communication with the first cavity 11. The first air outlet 14 is arranged on the side of the face shell 1a facing the charging device 100, and the side of the face shell 1a away from the charging device 100 is fixedly connected with the connecting 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 is arranged on the slot of the first groove 1b1 to form the 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 is arranged on the slot of the second groove 1b2 to form the second channel 13. In this way, the first channel 12 and the second channel 13 are easily formed, and the shell 1 is easily manufactured.

[0095] Further, the first cover plate 1c1 is further provided with a boss 1c12 surrounding the outside of the air outlet hole 1c11, and 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, so that the low-temperature airflow discharged from the first channel 12 will not leak when passing through the air outlet hole 1c11.

[0096] Further, the side of the shielding member 5 away from the wireless transmitting coil assembly 4 abuts against the face shell 1a, so that the low-temperature airflow passing through the avoiding through hole 51 will not leak.

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

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

[0099] It should be noted that the shape of the first air outlet hole 1c11 and the second air outlet hole 1c21 is not limited in this embodiment.

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

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

[0102] Optionally, the connecting 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 connecting shell 1b.

[0103] Specifically, the connecting shell 1b is provided with a first limiting groove 1b3, and the wireless charging transmitting coil assembly is fixedly arranged in the first limiting groove 1b3. Thus, the wireless charging coil assembly can be clamped by the side wall of the first limiting groove 1b3, so as to achieve the purpose of preventing the wireless charging coil assembly from moving relative to the connecting shell 1b.

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

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

[0106] Further, the connecting shell 1b is fixedly connected with the face shell 1a, so as to close the slot of the first limiting groove 1b3 and the slot of the second limiting groove 1b4 by the face shell 1a, thereby forming the second cavity 16.

[0107] Further, the connecting shell 1b is made of plastic, which has good insulation.

[0108] Optionally, the shell 1 further comprises a bottom shell 1d, which is fixedly arranged on one side of the connecting shell 1b. The bottom shell 1d is sleeved on the outer side of the blowing member 3, and the bottom shell 1d is provided with an air inlet 1d1 corresponding to the blowing member 3. Thus, the bottom shell 1d can protect the blowing member 3 and improve the appearance of the wireless charger.

[0109] Optionally, a third cavity 17 is formed between the bottom shell 1d and the connecting shell 1b, 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 material of the bottom shell 1d, and the reliability of the circuit board 6 is improved.

[0110] Optionally, the first cavity 11 is provided with a first opening and a second opening on two sides respectively, and the shell 1 further comprises a third cover plate 1c3, the third cover plate 1c3 is arranged on the first opening to seal the first opening; the blowing piece 3 is fixedly arranged on the second opening. In this way, the first cavity 11 is easy to form, and the semiconductor refrigeration piece 2, the first heat dissipation piece 81 and the second heat dissipation piece 82 are easy to assemble.

[0111] In the embodiment, the first opening, the first groove 1b1 and the second groove 1b2 are located on the side of the connecting shell 1b facing the face shell 1a, and the first cover plate 1c1, the second cover plate 1c2 and the third cover plate 1c3 are integrally formed, so that the processability of the connecting shell 1b is better, the assembly is facilitated, and the sealing performance of the first cavity 11, the first channel 12 and the second channel 13 is improved.

[0112] Further, the face 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, the volume of the wireless charger is smaller, and the lightweight requirement is met.

[0113] Optionally, the shell 1 is further provided with a flange 1a1, so that the flange 1a1 is matched with the cabin of the vehicle or the aircraft, and the appearance is improved. For example, the face shell 1a is provided with a flange 1a1 at each end, and it should be noted that the size and shape of the flanges 1a1 at the two ends of the face shell 1a can be selected according to specific requirements, which are not limited herein.

[0114] Optionally, the face shell 1a is further provided with a containing groove 1a2 for containing the charging device 100, and the first air outlet 14, the second air outlet 15 and the positioning structure 183 are arranged in the containing groove 1a2. When the charging device 100 needs to be charged, the charging device 100 is placed in the containing groove 1a2, so that the charging device 100 is prevented from being displaced during charging, and the charging efficiency is ensured.

[0115] In the embodiment, the second air outlet 15 is located at one end of the containing groove 1a2, and the wind blocking structure 182 is a C-shaped blocking table, both ends of the C-shaped blocking table are connected with the side wall of the containing groove 1a2, so that the wind blocking purpose can be achieved by part of the side wall of the containing groove 1a2, and the wind blocking structure 182 is simplified and the processability of the shell 1 is improved.

[0116] For example, the working principle of the wireless charger of the embodiment is as follows:

[0117] When the wireless charger is working, the electric current passes through the semiconductor refrigeration piece 2, so that the heat is transferred from one side of the semiconductor refrigeration piece 2 to the other side, that is, the semiconductor refrigeration piece 2 has the phenomenon that one side is high in temperature and the other side is low in temperature. Specifically, the low-temperature side of the semiconductor refrigeration piece 2 lowers the temperature of the first heat dissipation piece 81, and the high-temperature side of the semiconductor refrigeration piece 2 raises the temperature of the second heat dissipation piece 82.

[0118] The axial flow fan sucks the air in the environment into the first cavity 11 and forms two air flows on both sides of the semiconductor refrigeration piece 2, one of which exchanges heat with the first heat dissipation piece 81 to form a low-temperature air flow and enter the first channel 12, and then the low-temperature air flow is discharged from the first air outlet 14 after passing through the air outlet hole 1c11 and the avoiding through hole 51 of the shielding piece 5, and directly blows to the position of the back of the charging device 100 opposite to the wireless receiving coil, so as to achieve the purpose of quickly cooling the charging device 100.

[0119] Meanwhile, the other air flow exchanges heat with the second heat dissipation piece 82 to form a high-temperature air flow and enter the second channel 13, and then the high-temperature air flow is discharged from the second air outlet 15 after passing through the air outlet hole 2c21, and the wind blocking structure 182 can avoid the high-temperature air flow from contacting the charging device 100, so as not to affect the heat dissipation effect of the charging device 100.

[0120] It should be noted that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A wireless charger, characterized by, The wireless charger comprises: a 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 staggered with the charging device (100); a semiconductor refrigeration sheet (2) arranged in the first cavity (11), one end of the first channel (12) being arranged opposite to a low-temperature side of the semiconductor refrigeration sheet (2) and being in communication with the first cavity (11), and the other end being in communication with the first air outlet (14), one end of the second channel (13) being arranged opposite to a high-temperature side of the semiconductor refrigeration sheet (2) and being in communication with the first cavity (11), and the other end being in communication with the second air outlet (15); a blowing piece (3) for blowing air to the first cavity (11).

2. The wireless charger of claim 1, wherein, The wireless charger further comprises a wireless transmitting coil assembly (4), and the shell (1) further comprises a second cavity (16), and the wireless transmitting coil assembly (4) is fixedly arranged in the second cavity (16). The wireless transmitting coil assembly (4) is provided with a center hole (43) which is sleeved outside the other end of the first channel (12).

3. The wireless charger of claim 2, wherein, The wireless charger further comprises a shielding piece (5) which is fixedly arranged on a side of the wireless transmitting coil assembly (4) facing the wireless receiving coil assembly. The shielding piece (5) is provided with an avoiding through hole (51) which is sleeved outside the other end of the first channel (12).

4. The wireless charger of claim 2, wherein, The wireless charger further comprises: a circuit board (6) fixedly arranged in the shell (1), and the wireless transmitting coil assembly (4), the semiconductor refrigeration sheet (2) and the blowing piece (3) are in communication connection with the circuit board (6); a first temperature detection piece for detecting the temperature of the wireless transmitting coil assembly (4), the first temperature detection piece being in communication connection with the circuit board (6); and / or a second temperature detection piece for detecting the temperature of the high-temperature side of the semiconductor refrigeration sheet (2), the second temperature detection piece being in communication connection with the circuit board (6); and / or a third temperature detection piece for detecting the temperature of the low-temperature side of the semiconductor refrigeration sheet (2), the third temperature detection piece being in communication connection with the circuit board (6).

5. The wireless charger of claim 1, wherein, The wireless charger further comprises a first heat dissipation piece (81) fixedly arranged on the low-temperature side of the semiconductor refrigeration sheet (2); and / or The wireless charger further comprises a second heat dissipation piece (82) fixedly arranged on the high-temperature side of the semiconductor refrigeration sheet (2).

6. The wireless charger of claim 5, wherein, The wireless charger further comprises a heat insulation piece (9) clamped between the first heat dissipation piece (81) and the second heat dissipation piece (82), and the heat insulation piece (9) is arranged outside the semiconductor refrigeration piece (2) around the thickness direction of the semiconductor refrigeration piece (2).

7. The wireless charger of claim 6, wherein, The heat insulation piece (9) separates the first cavity (11) into a first sub-cavity (111) and a second sub-cavity (112) which are not communicated with each other, the first channel (12) is communicated with the first sub-cavity (111), and the second channel (13) is communicated with the second sub-cavity (112).

8. The wireless charger of claim 1, wherein, The second air outlet (15) is located on the side of the shell (1) facing the charging device (100).

9. The wireless charger of claim 8, wherein, The shell (1) is further provided with a wind blocking structure (182) arranged outside the second air outlet (15).

10. The wireless charger of claim 1, wherein, The shell (1) is further provided with a positioning structure (183), and when the charging device (100) abuts against the positioning structure (183), the wireless receiving coil assembly is opposite to the first air outlet (14).

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