A wireless charger with built-in double fans

Abstract

The utility model discloses a built -in double fan's wireless charger belongs to wireless charging equipment technical field, this charger includes casing, double fan, mainboard and wireless charging coil, first fan guides the airflow to flow through mainboard and coil and discharges from first air outlet, and the cooling core part is cooled, the second fan blows the air to the camera below in the orientation, and the double air outlet airflow forms the convection, realizes "coil + camera + mainboard + mobile phone " multi -area accurate heat dissipation. The casing adopts the upper and lower split type structure, and the supporting strip suspends the mobile phone to enhance the air circulation, the mainboard integrates QC, PD and so on fast charging agreement module and multi -interface, and adapts mainstream model, and NTC thermistor monitors the temperature in real time, and dynamically adjusts the fan rotating speed and charging power. The utility model through the second fan is separately given the camera position and carries out the heat dissipation, reaches the whole charging steady process, and the heat dissipation efficiency and fast charging stability are improved significantly.

Description

Technical Field

[0001] This utility model relates to the field of wireless charging equipment technology, and in particular to a high-efficiency wireless charger that integrates a dual-fan heat dissipation system, a multi-protocol fast charging module, and intelligent temperature control. Background Technology

[0002] In existing technologies, traditional wireless chargers generally employ a single-fan cooling structure, relying solely on a bottom fan to dissipate heat from the charging coil. However, when a phone is in super-fast charging mode, the charging coil and front-facing camera area generate significant heat. Actual test data shows that when a phone is using wireless fast charging (50W), the charging coil temperature can reach over 65°C, and the front-facing camera area, due to the upward flow of hot air from the single fan, can soar to 58°C, far exceeding the phone's overheat protection threshold (typically 45-50°C). This results in a approximately 30% decrease in charging power and an over 40% increase in charging time. Furthermore, the upward flow of hot air from the single fan in existing chargers directs all the coil heat towards the camera, causing the camera to overheat and raising the overall phone temperature. This can easily lead to excessively high camera area temperatures, triggering the phone's overheat protection mechanism. The phone then interprets this as excessive heat and reduces power or even disconnects charging. Additionally, a single heat dissipation path cannot efficiently cover the entire heat-generating area of ​​the phone, affecting charging efficiency and device safety. Therefore, a wireless charger with dual-fan collaborative cooling is urgently needed to solve these technical problems. Utility Model Content

[0003] In view of this, this utility model provides a wireless charger with built-in dual fans. Through the independent heat dissipation path design of the dual fans, it achieves precise cooling of the phone's charging coil and camera. The first fan guides airflow through the motherboard and charging coil, cooling the core heat-generating components; the second fan provides targeted heat dissipation to the camera area, preventing hot air accumulation. The convection effect created by the dual fans can quickly dissipate heat from both sides of the phone. Combined with the multi-coil layout, multi-protocol fast charging module, and temperature monitoring system, it significantly improves charging efficiency and safety.

[0004] This invention provides a wireless charger with built-in dual fans, including a housing, a first fan, a second fan, a motherboard, and a wireless charging coil. The first fan, second fan, wireless charging coil, and power supply are all electrically connected to the motherboard. The first fan draws in air from outside the housing and directs it through the motherboard and a first air outlet. A support strip is provided around the first air outlet to suspend the charging device. The second fan draws in air from outside the housing and blows it out through a second air outlet, which is positioned below the camera of the charging device. The air from the first and second air outlets forms a convection current to dissipate heat from both sides of the charging device. Through the independent cooling path design of the dual fans, the first fan guides air through the motherboard and wireless charging coil, and discharges it through the first air outlet, cooling the core charging components. The second fan blows air directly below the camera for targeted cooling. The airflow from the two outlets forms a convection current, dissipating heat from both sides of the phone, effectively solving the problem of overheating caused by hot air blowing towards the camera in traditional single-fan cooling. This achieves precise cooling in both the coil and camera areas, improving overall cooling efficiency and ensuring continuous and stable charging in fast charging mode.

[0005] Further describing the aforementioned solution, the housing includes an upper housing and a lower housing that interlock with each other. The lower housing is provided with an air inlet, and the upper housing has a first air guide hole and a second air guide hole. A guide plate is also attached to the surface of the upper housing, and a support strip is provided on the surface of the guide plate to suspend the mobile phone, thereby optimizing the airflow path and ensuring that cold air flows fully through the heat-generating components. The suspended design prevents the mobile phone from being in close contact with the surface of the charger, enhances air circulation, and improves heat dissipation.

[0006] Optionally, the lower housing has a slot, and the housing is detachably connected to the connector through the slot, which facilitates installation and disassembly.

[0007] Further description of the aforementioned solution: there are two or more wireless charging coils, all located in the area below the support bar. This not only accommodates various phone placement positions, ensuring accurate alignment with the coil for charging regardless of whether the phone is placed vertically or horizontally, but also improves charging efficiency.

[0008] Further describing the aforementioned solution, the support strip includes a bottom 'U'-shaped support strip and a top horizontal support strip, with the 'U'-shaped support strip and the horizontal support strip being separately configured. The first air outlet is located at the inner bottom of the 'U'-shaped support strip, and the second air outlet is close to the horizontal support strip and located on one side of the 'U'-shaped support strip. The U-shaped support strip supports the bottom of the phone, while the horizontal support strip limits the top, ensuring the phone is stably suspended. The dual air outlets are precisely positioned to correspond to the phone's heat sources (coil and camera), avoiding mutual airflow interference and achieving "zoned heat dissipation."

[0009] Further description of the aforementioned solution: the motherboard is electrically connected to USB Type-A ports, USB Type-C ports, and Micro-USB ports, which can be adapted to mainstream charging cable interface standards, improve product versatility, and cover a wider range of users.

[0010] Further describing the aforementioned solution, the motherboard integrates fast charging protocol modules, including QC (Quick Charge) protocol modules, PD (Power Delivery) protocol modules, FCP (Fast Charge Protocol) protocol modules, and SCP (Super Charge Protocol) protocol modules, which are compatible with the fast charging standards of different mobile phone brands. It also includes a temperature sensor, which is an NTC thermistor sensor soldered onto the motherboard. This sensor collects temperature data in real time during the charging process and transmits it to the motherboard's microcontroller unit. The intelligent temperature control system dynamically adjusts the fan speed or charging power to prevent overheating and ensure safety.

[0011] Furthermore, the first and second fans circulate air sequentially to the motherboard, above the wireless charging coil, and the surface of the charging device, carrying away heat from the motherboard, wireless charging coil, and mobile phone, achieving full-area heat dissipation of the "motherboard + coil + mobile phone", avoiding local heat accumulation, and extending the lifespan of the charger and mobile phone.

[0012] Optionally, an indicator light is also provided, which is installed on the front end or upper surface of the housing and provides visual prompts through light-transmitting holes or light guide plates.

[0013] Compared to existing technologies, this wireless charger with a built-in dual-fan design utilizes an independent cooling path for both fans. The first fan cools the motherboard and charging coils, while the second fan provides targeted cooling below the camera. The airflow from the two vents creates convection, expelling heat from both sides of the charging device. This solves the problem of hot air blowing directly onto the camera, causing overheating and triggering the phone's overheat protection mechanism, which is common with traditional single-fan cooling systems. This multi-area precise cooling improves overall efficiency and ensures stable charging in fast charging mode. A support strip in the casing suspends the phone, enhancing airflow and optimizing the airflow path. Two or more wireless charging coils are included, accommodating various phone placement positions and improving charging efficiency. The motherboard integrates multiple fast charging protocol modules and mainstream charging cable interfaces, offering strong compatibility. A temperature sensor collects real-time temperature data to ensure safety. Furthermore, indicator lights provide visual status updates. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 , 2 This is an overall schematic diagram of an embodiment of the present utility model;

[0016] Figure 3 , 4 An exploded view diagram provided for an embodiment of this utility model;

[0017] Figure 5 This is a schematic diagram of the motherboard and upper shell structure provided in an embodiment of the present utility model;

[0018] Figure 6 An overall sectional view provided for an embodiment of this utility model.

[0019] The following are the labeling elements in the figure:

[0020] 1. Upper housing; 11. First air guide hole; 12. Second air guide hole; 2. Lower housing; 21. Air inlet; 22. Slot; 23. Connector; 3. Air guide plate; 31. First air outlet; 32. Second air outlet; 33. Support bar; 4. Mainboard; 41. Port; 42. Wireless charging coil; 6. First fan; 7. Second fan; 8. Mobile phone.

[0021] The accompanying drawings have illustrated specific embodiments of the present invention, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the present invention in any way, but rather to illustrate the concept of the present invention to those skilled in the art through reference to specific embodiments. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] To make the technical solution and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] Please see Figures 1-6As shown, the built-in dual-fan wireless charger provided by this utility model achieves an integrated solution of efficient heat dissipation, multi-protocol compatibility and intelligent temperature control through the collaborative design of multiple components.

[0025] The housing adopts a split structure, with the upper housing 1 and lower housing 2 fastened together by snaps, forming an internal cavity to accommodate electronic components. A baffle plate 3 is attached to the surface of the upper housing 1, and a support strip 33 on its surface suspends the mobile phone 8 above the baffle plate 3, ensuring unobstructed airflow. The upper housing 1 is made of PC+ABS flame-retardant material, conforming to UL94 V-0 standards. Internally, a first air guide hole 11 and a second air guide hole 12 are injection molded, corresponding to the air outlet paths of the first fan 6 and the second fan 7, respectively.

[0026] The bottom of the lower housing 2 has a honeycomb-shaped air inlet 21, which accounts for 15%-30% of the total area of ​​the bottom surface of the lower housing 2, ensuring the efficiency of cold air intake. The back is provided with a slot 22, which can be detachably connected to the connector 23 by a buckle, supporting installation in multiple scenarios such as desktop and vehicle.

[0027] In the dual-fan cooling system, the first fan 6 can be a centrifugal fan with a rated voltage of 5V, a maximum airflow of 5CFM, and a noise level of ≤25dB. It is installed above the air inlet 21 at the bottom of the lower housing 2, with the air inlet aligned with the air inlet 21. The air outlet is connected to the bottom of the motherboard 4 through a guide channel, and the airflow is discharged from the first air outlet 31 after passing through the motherboard 4. The second fan 7 is installed inside the front end of the upper housing 1, with its air outlet aligned with the second guide hole 12, and airflow is blown directly from the second air outlet 32, corresponding to the position below the camera of the phone 8.

[0028] The motherboard 4 integrates a power management unit, a fast charging protocol chip, a temperature monitoring circuit, and a fan drive circuit. The power management unit connects to USB Type-A port 41, USB Type-C port, or Micro-USB port, supporting a wide input voltage range of 5-20V and compatible with mainstream charging cable interfaces. The fast charging protocol chip integrates Qualcomm QC4+, PD3.0, Huawei FCP / SCP, Samsung AFC, and other protocol modules, supporting multiple power outputs such as 5W / 10W / 15W / 20W / 30W / 50W, and communicates with the microcontroller unit via the SPI bus.

[0029] The temperature monitoring circuit uses an NTC thermistor sensor, soldered to the back of the motherboard 4 using SMD technology, near the wireless charging coil 42 area. It collects temperature data in real time and transmits it to the MCU, which is an STM32F103C8T6. The fan drive circuit uses a dual-channel PWM driver chip, such as the AP2166, to adjust the fan speed according to MCU instructions, supporting three speeds: 1500rpm, 2200rpm, and 3000rpm. It also features overcurrent protection and stall detection.

[0030] In this embodiment, the wireless charging coil 42 uses three flat spiral coils, which are fixed to the area below the guide plate 3 by adhesive backing and are distributed in a matrix.

[0031] like Figure 1 , Figure 6 As shown, the dual fans work together to form a cooling cycle of "bottom air intake - three-dimensional convection - side air exhaust". The cooling path of the first fan 6 is that cold air is drawn in from the air intake 21 of the lower shell 2, pressurized by the first fan 6, and flows upward over the back of the motherboard 4, cooling the power chip, fast charging module and other heat-generating components on the motherboard 4. Then the airflow enters the air guide channel between the guide plate 3 and the upper shell 1, and is blown out from the first air outlet 31, directly acting on the wireless charging coil 42 area at the bottom of the phone 8. Actual measurements show that it can reduce the coil temperature by 18-22℃. The second fan 7 independently draws in air from the front side of the shell or the air intake of the lower shell 2. After being accelerated by the fan, the airflow is blown out from the second air outlet 32, directly reaching the area below the front camera of the phone 8, forming a directional cooling airflow. Actual measurements show that it can reduce the temperature of the camera area by 15-19℃. The airflow from the first air outlet 31 and the second air outlet 32 ​​achieves convection and is discharged from the upper part of the phone 8 from both sides. The overall heat dissipation efficiency is 55%-70% higher than that of the single-fan solution.

[0032] The support strip 33 on the surface of the air deflector 3 adopts a "U-shaped + horizontal" separation structure. The U-shaped support strip 33 is located at the bottom center of the air deflector 3, forming an inverted "U" shape. A support point can be set in the middle, and its width is adapted to the bottom width of the phone 8. It is made of silicone material, providing anti-slip cushioning when in contact with the bottom of the phone 8, while also reserving an air outlet gap for the first air outlet 31. The horizontal support strip is located at the top edge of the air deflector 3 and is a strip-shaped silicone pad with a length consistent with the width of the air deflector 3. It is used to limit the top of the phone 8. The distance between the bottom surface of the phone 8 and the air deflector 3 is 5-8mm, forming an airflow channel with a top opening. The airflow cross-sectional area is increased by 40% compared to the traditional fitted design, effectively reducing heat conduction loss.

[0033] Regarding fast charging protocol compatibility, the fast charging protocol module integrated on the motherboard 4 automatically switches protocols by recognizing the handshake signal from the phone 8. When connected to an iPhone, it triggers the PD3.0 protocol, supporting the highest power output; when connected to a Huawei phone, it activates the SCP protocol, supporting the highest wireless super-fast charging; and when compatible with brands such as Xiaomi and Samsung, it automatically matches the QC or AFC protocol to ensure efficient charging for all brands. In the intelligent temperature control logic, the NTC sensor collects the temperature of the motherboard 4, the coil temperature, and the surface temperature of the phone 8 in real time. The MCU adjusts the fan power according to the temperature strategy. When the surface temperature of the phone 8 is <35℃, the fan stops and operates at the lowest noise level; when 35℃ ≤ temperature < 40℃, the first fan 6 runs at 1500rpm, and the second fan 7 is in standby mode; when 40℃ ≤ temperature < 45℃, both fans run at 2200rpm to maintain fast charging power; when the temperature is ≥45℃, both fans run at full speed of 3000rpm until the temperature drops back to a safe range, ensuring that the phone temperature is below the protection threshold to achieve the highest charging power.

[0034] In some embodiments, when the mobile phone 8 is placed on the air guide plate 3, the fan starts working directly and runs at a constant speed of 4500 rpm. Then, during the charging process, the fan runs at 6900 rpm. After the mobile phone 8 is removed, the fan stops working.

[0035] A light-transmitting hole is opened at the front or top of the upper housing 1, and an RGB LED indicator is built in. The indicator light is emitted evenly through the light guide plate. A solid blue light indicates normal charging, a flashing green light indicates fast charging activation, a strobe red light indicates an overheat warning, and an orange breathing light indicates standby mode.

[0036] Application scenarios include desktop and in-vehicle scenarios. In the desktop scenario, the phone is mounted on a metal base via connector 23, with the phone 8 placed vertically on support bar 33, suitable for office and home charging. Dual fans intelligently activate during fast charging to ensure no overheating during prolonged charging. In the in-vehicle scenario, connector 23 is replaced with an in-vehicle air vent clamp. The lower housing 2 slot 22 is secured to the clamp, and the phone 8 is placed horizontally on support bar 33. The second air vent 32 is aligned with the camera area of ​​the phone 8 to prevent overheating due to high temperatures in the in-vehicle environment. Furthermore, it supports simultaneous charging of the phone 8, wireless earphones, and other devices, with a multi-coil layout ensuring effective charging regardless of the device's placement.

[0037] In summary, this utility model breaks through the single-fan single-path limitation by using dual-fan three-dimensional heat dissipation to achieve precise cooling of the "coil + camera" dual areas, solving the charging interruption problem caused by overheating protection; the multi-coil intelligent layout is compatible with multi-position charging, improving user experience and avoiding charging failure caused by incorrect phone placement; the full-protocol fast charging combined with intelligent temperature control covers the fast charging needs of mainstream brands, dynamically adjusting and balancing charging speed and safety.

[0038] Other embodiments of the present invention will readily occur to those skilled in the art upon consideration of the specification and practice of the invention. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and embodiments are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the foregoing claims.

[0039] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element present. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations. The terms "upper end," "lower end," "left side," "right side," "front end," "rear end," and similar expressions used herein refer to the positional relationship with reference to the accompanying drawings.

[0040] It should be understood that this invention is not limited to the precise structure described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this invention is limited only by the appended claims.

Claims

1. A wireless charger with built-in dual fans, characterized in that: The device includes a housing, a first fan (6), a second fan (7), a motherboard (4), and a wireless charging coil (42). The first fan (6), the second fan (7), the wireless charging coil (42), and the power supply are all electrically connected to the motherboard (4). The first fan (6) is used to draw in air from outside the housing and make the air flow through the motherboard (4) and the first air outlet (31) in sequence. The first air outlet (31) is provided with a support bar (33) around its periphery for suspending the charging device. The second fan (7) is used to draw in air from outside the housing and blow it out from the second air outlet (32). The second air outlet (32) is located below the camera of the charging device. The air blown out from the first air outlet (31) and the second air outlet (32) forms a convection to exhaust heat from both sides of the charging device.

2. The wireless charger with built-in dual fans according to claim 1, characterized in that: The housing includes an upper housing (1) and a lower housing (2) that are interlocked. The lower housing (2) is provided with an air inlet (21). The upper housing (1) is provided with a first air guide hole (11) and a second air guide hole (12). A guide plate (3) is also attached to the surface of the upper housing (1). A support strip (33) for suspending the mobile phone (8) is provided on the surface of the guide plate (3).

3. A wireless charger with a built-in dual fan according to claim 2, characterized in that: The lower housing (2) has a slot (22), and the housing is detachably connected to the connector (23) through the slot (22).

4. A wireless charger with built-in dual fans according to claim 1, characterized in that: There are two or more wireless charging coils (42), all located in the area below the support bar (33).

5. A wireless charger with a built-in dual fan according to claim 1, characterized in that: The support bar (33) includes a bottom 'U'-shaped support bar and a top horizontal support bar, and the 'U'-shaped support bar and the horizontal support bar are set separately. The first air outlet (31) is located at the bottom inner side of the 'U'-shaped support bar, and the second air outlet (32) is close to the horizontal support bar and located on one side of the 'U'-shaped support bar.

6. A wireless charger with built-in dual fans according to claim 1, characterized in that: The motherboard (4) is electrically connected to the USB Type-A port, USB Type-C port and Micro-USB port, and can be adapted to mainstream charging cable interface standards.

7. A wireless charger with built-in dual fans according to claim 1, characterized in that: The motherboard (4) integrates a fast charging protocol module, including a QC (Quick Charge) protocol module, a PD (Power Delivery) protocol module, an FCP (Fast Charge Protocol) protocol module, and an SCP (Super Charge Protocol) protocol module, which are compatible with the fast charging standards of different brands of mobile phones; it also includes a temperature sensor, which is an NTC thermistor sensor, soldered on the motherboard (4), to collect temperature data in real time during the charging process and transmit it to the microcontroller unit of the motherboard (4).

8. A wireless charger with built-in dual fans according to claim 1, characterized in that: The first fan (6) and the second fan (7) circulate air sequentially to the motherboard (4), the wireless charging coil (42), and the surface of the charging device, carrying away the heat from the motherboard (4), the wireless charging coil (42), and the charging device.

9. A wireless charger with built-in dual fans according to claim 1, characterized in that: It is also equipped with indicator lights, which are installed on the front end or upper surface of the housing and provide visual prompts through light-transmitting holes or light guide plates.

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