A gallium nitride charger

Abstract

The application discloses a gallium nitride charger, which comprises a shell and an electric control assembly, and further comprises a containing box arranged in the shell, a first water flow channel arranged on the shell or in the shell and communicated with the containing box at both ends to form a first water circulation loop, a water pump arranged on the first water circulation loop, a temperature sensor arranged in the shell, a spraying assembly communicated with the containing box, a first electromagnetic valve arranged on the first water circulation loop, and a controller electrically connected with the water pump, the temperature sensor, the spraying assembly, the first electromagnetic valve and the electric control assembly to drive the water pump to circulate the insulating cooling liquid in the first circulation loop, and when the temperature exceeds a preset threshold value, the controller controls the first electromagnetic valve to be closed, so that the water pump supplies water to the spraying assembly to spray the insulating cooling liquid to the electric control assembly. The gallium nitride charger can actively cool the inside of the gallium nitride charger, and can actively put out the fire when the gallium nitride charger catches fire.

Description

Technical Field

[0001] This invention relates to the field of mobile phone charger technology, and in particular to a liquid-cooled gallium nitride mobile phone charger. Background Technology

[0002] As the performance of smart terminal devices continues to upgrade, users are increasingly demanding higher fast charging power, charging efficiency, and compatibility with various scenarios for mobile phone chargers. Compared to traditional silicon-based chargers, gallium nitride (GaN) chargers offer significant advantages such as low conduction loss, high switching frequency, high power density, and compact size. They can achieve high-power fast charging while significantly reducing the overall size of the device, and have now become the mainstream choice and preferred solution for mobile phone fast chargers.

[0003] However, existing gallium nitride (GaN) mobile phone chargers, in pursuit of miniaturization and high power density, have core heat-generating components such as power MOSFETs, high-frequency transformers, and synchronous rectifiers arranged compactly, significantly reducing the overall heat dissipation area. They rely solely on natural convection from the casing and conventional thermal pads for passive cooling, resulting in extremely limited heat dissipation capabilities. Under prolonged full-load fast charging conditions, heat easily accumulates inside the charger and cannot dissipate quickly enough, leading to a rapid increase in overall temperature. When the internal temperature reaches a preset threshold, the device will forcibly trigger power derating, actively reducing the charging output power and failing to maintain full-speed fast charging. This results in a significant decrease in charging speed and an increase in charging time, severely impacting the user's fast charging experience.

[0004] Furthermore, existing gallium nitride (GaN) chargers only have passive overheat protection and power reduction functions, lacking active flame retardant and fire suppression structures. When the charger operates at high temperatures for extended periods, or when components age and short-circuit, or when there is an abnormal overload, it can easily lead to internal fires, thermal runaway, and other safety accidents.

[0005] Therefore, the aforementioned technical problems need to be solved. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention proposes a gallium nitride (GaN) charger that can actively cool the internal components of the GaN charger to keep it in optimal operating condition. In addition, it can actively extinguish a fire that occurs inside the GaN charger.

[0007] To solve the above-mentioned technical problems, the basic technical solution proposed by this invention is as follows:

[0008] A gallium nitride charger includes a housing and an electronic control component assembled within the housing, characterized in that it further includes:

[0009] A container, located inside the housing, is used to hold insulating coolant;

[0010] The first water flow channel is laid on the shell or inside the shell, and the inlet and outlet of the first water flow channel are both connected to the container to form a first water circulation loop, which is used to cool the inside of the shell.

[0011] A water pump is installed on the first water circulation loop to provide power for the insulating coolant to circulate in the first water circulation loop.

[0012] A temperature sensor, located inside the housing, is used to detect the internal temperature of the housing;

[0013] A spraying assembly, connected to the receiving tank, is used to spray the insulating coolant onto the electrical control assembly;

[0014] The first solenoid valve is located on the first water circulation loop and is used to control the opening and closing of the first water circulation loop.

[0015] The controller is electrically connected to the water pump, temperature sensor, spraying assembly, first solenoid valve, and electronic control assembly to drive the water pump to circulate the insulating coolant in the first circulation loop. When the temperature detected by the temperature sensor exceeds a preset threshold, the controller controls the first solenoid valve to close, so that the water pump supplies water to the spraying assembly, and the spraying assembly sprays the insulating coolant onto the electronic control assembly.

[0016] Preferably, the first water flow channel is laid along the periphery of the housing. Preferably, the first water flow channel is S-shaped.

[0017] Preferably, the housing is further provided with a cold plate, and a second water flow channel is laid inside the cold plate. The first water flow channel and the second water flow channel are respectively connected to the receiving tank, and the three are connected end to end to form a closed and connected second water circulation loop. The water pump is located at any point on the second water circulation loop to provide driving force.

[0018] Preferably, the electronic control component includes a circuit board, and the cold plate abuts against the back of the circuit board.

[0019] Preferably, the second water flow channel is S-shaped.

[0020] Preferably, the spraying assembly includes a nozzle and a second solenoid valve, both of which are electrically connected to the controller;

[0021] The water pump is installed between the first solenoid valve and the outlet of the container;

[0022] The nozzle's spray end is positioned towards the electronic control component, and the nozzle is connected between the water pump outlet and the first solenoid valve, so that the water pump can deliver the insulating coolant in the receiving cavity to the nozzle;

[0023] The second solenoid valve is mounted at one end of the nozzle inlet to control the opening and closing of the nozzle.

[0024] Preferably, the container has a liquid filling port on one side that communicates with the internal space, and the liquid filling port is exposed to the outside of the housing.

[0025] Preferably, the receiving box is fixedly connected to the housing, and the receiving box has a mounting slot, in which the electrical control components, water pump, temperature sensor and controller are all assembled.

[0026] Preferably, the housing is further provided with an alarm, which is electrically connected to the controller.

[0027] The beneficial effects of this invention are:

[0028] This gallium nitride (GaN) charger features a storage tank for insulating coolant, which, along with a primary water channel and pump, forms a closed-loop water circulation system. Under normal conditions, the controller, based on the internal temperature collected by a temperature sensor, drives the pump to continuously circulate the insulating coolant within the water circulation loop. This rapidly removes and reduces heat buildup inside the casing, effectively mitigating the problem of overall heat accumulation during high-power fast charging. This prevents the charger from derating due to high temperatures, ensuring continuous and stable full-power fast charging while extending the lifespan of internal capacitors and electronic components. When the temperature sensor detects that the internal temperature exceeds a preset safety threshold, the controller activates a spray system to spray the insulating coolant from the storage tank onto the electronic components. The coolant's insulating, flame-retardant, and heat-absorbing properties quickly reduce the component temperature and isolate the components from oxygen, interrupting the combustion chain reaction and promptly suppressing and extinguishing the initial fire, preventing its spread. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a gallium nitride charger according to the present invention;

[0030] Figure 2 This is a schematic diagram of the first flow channel structure of a gallium nitride charger according to the present invention;

[0031] Figure 3 This is a schematic diagram showing the connection relationship of various components of a gallium nitride charger according to the present invention;

[0032] Figure 4 This is a schematic diagram of a gallium nitride charger spraying component structure according to the present invention;

[0033] Figure 5This is an assembly schematic diagram of a gallium nitride charger cold plate according to the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of a gallium nitride charger cold plate according to the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Housing; 2. Container; 3. Water pump; 4. Electrical control components; 5. Spraying components; 6. First water flow channel; 7. Cold plate; 8. First solenoid valve; 9. Second solenoid valve; 10. Nozzle; 11. Liquid filling port; 21. Container inlet; 22. Container outlet; 31. Water pump inlet; 32. Water pump outlet; 41. Circuit board; 42. Temperature sensor; 43. Alarm; 61. First water flow channel outlet; 71. Cold plate inlet; 72. Cold plate outlet; 73. Second water flow channel. Detailed Implementation

[0037] The following will be combined with the appendix Figure 1 To be continued Figure 6 The technical solutions in the embodiments of the present invention have been clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] The core inventive concept of this invention is to integrate a container for storing insulating coolant, a first water channel connected to the container to form a closed-loop water circulation circuit, a water pump to provide circulation power, and a temperature sensor to detect the internal temperature within the charger housing. Under normal conditions, the controller drives the water pump to circulate the coolant based on the temperature signal from the temperature sensor, continuously removing heat from the charger to stabilize the fast charging power. Simultaneously, a spraying component connected to the container is added. When the detected temperature exceeds a safety threshold, the controller synchronously controls the water pump and the spraying component to spray the insulating coolant onto the electronic control components, utilizing the heat absorption, insulation, and flame-retardant properties of the coolant to quickly cool down and extinguish initial fires.

[0039] It is understood that the technology of this invention is generally applicable to adapters with higher charging power, such as 65W / 100W single / dual-port GaN chargers, 120W~150W multi-port GaN chargers, and some computer adapters, etc. Furthermore, it is not limited to use only in GaN chargers for mobile phones; it can also be applied to other types of adapters.

[0040] This embodiment proposes a gallium nitride charger, such as... Figure 1As shown, the device includes a housing 1 and an electronic control assembly 4 assembled within the housing 1. The electronic control assembly 4 integrates components such as a gallium nitride power transistor, a high-frequency transformer, a synchronous rectifier element, and a fast charging protocol chip.

[0041] For details, please refer to Figure 1 The housing 1 has an internal container 2, which stores insulating and non-flammable coolant. The coolant will not cause short circuits or corrosive damage to the electronic control components 4. The inner wall or internal space of the housing 1 is provided with a first water flow channel 6. The inlet and outlet of the first water flow channel 61 are respectively connected to the container 2, and the two work together to form a complete closed first water circulation loop.

[0042] A water pump 3 is installed on the first water circulation loop. The water pump 3 serves as the circulation power source and can drive the coolant in the container 2 to continuously circulate between the container 2 and the first water flow channel 6, thereby dissipating heat from the inside of the shell 1.

[0043] The first water circulation loop is also equipped with a first solenoid valve 8, which is used to control the opening and closing of the first water circulation loop.

[0044] A temperature sensor 42 is installed inside the housing 1. The temperature sensor 42 can be set at any position inside the housing 1. The temperature sensor 42 is preferably set close to the core heating point of the electronic control component 4, so as to collect real-time temperature data of the surrounding area of ​​the electronic control component 4 inside the housing 1.

[0045] The housing 1 is also equipped with a spraying assembly 5, which can be connected to the interior of the container 2 via an independent pipeline, or connected to the first water flow channel 6 via a pipeline. The spray nozzles of the spraying assembly 5 are arranged facing the heat-generating components of the electronic control assembly 4, and can directly spray the coolant in the container 2 onto the electronic control assembly 4.

[0046] The charger has an internal controller that is electrically connected to the water pump 3, temperature sensor 42, spraying assembly 5, electronic control assembly 4, and first solenoid valve 8. Under normal charging conditions, the first solenoid valve 8 remains open. The controller receives the temperature signal collected in real time by the temperature sensor 42 and adjusts the speed of the water pump 3 according to the internal temperature. The water pump 3 drives the coolant to circulate continuously in the first water circulation loop. The circulating coolant continuously removes the heat generated by the electronic control assembly 4, reducing the temperature rise of heat sources such as gallium nitride devices and transformers. This prevents the charger from triggering power derating due to high temperature and ensures continuous and stable high-power fast charging output. When the temperature sensor 42 detects that the internal temperature of the housing 1 is higher than the preset safe temperature threshold, it determines that the electronic control component 4 is at risk of overheating and catching fire. The controller controls the first solenoid valve 8 to close, cuts off the first water circulation circuit, and controls the water pump 3 to supply water to the spraying component 5. The insulating flame-retardant coolant in the container 2 is sprayed onto the electronic control component 4 through the spraying component 5. On the one hand, the coolant quickly absorbs a large amount of heat to achieve rapid cooling. On the other hand, it covers the electronic control component 4 to isolate it from the air. The flame-retardant properties of the coolant itself suppress and extinguish the initial open flame generated by the components, and block the spread of the fire.

[0047] This embodiment integrates a circulating liquid cooling structure and an automatic spray flame-retardant structure within the same charger housing 1. They share the same water pump 3 and the same insulating coolant in the same container 2. This results in high component reusability and a compact overall structure, meeting the miniaturization design requirements of gallium nitride (GaN) chargers. Conventional charging relies on a closed-loop water circulation system for continuous heat dissipation, solving the problems of poor heat dissipation and easy power attenuation in high-power GaN chargers. Under abnormally high-temperature conditions, the system can automatically spray coolant to reduce temperature and extinguish fires, effectively improving the stability and fire safety performance of GaN chargers during long-term high-power operation.

[0048] It is understandable that the first water flow channel 6 can be arranged close to the heat source area of ​​the electronic control component 4, so that the coolant can continuously absorb the heat accumulated inside the housing 1 as it flows through; in one embodiment, the first water flow channel 6 can also be laid around the electronic control component 4, with the first water flow channel 6 wrapped around the electronic control component 4; in another embodiment, such as Figure 2 As shown, the first water flow channel 6 can be laid along the inner wall of the shell 1.

[0049] Furthermore, the first water flow channel 6 is arranged in an S-shaped meandering structure inside the housing 1. Compared with a straight flow channel, the S-shaped water flow channel can effectively extend the flow path and heat exchange time of the coolant within the limited internal space of the charger housing 1, and significantly increase the contact area of ​​the coolant.

[0050] The first water channel 6 can be formed directly by water pipes, or by directly opening pipes on the plate.

[0051] Among them, the insulating coolant can be selected from electronic fluorinated liquids such as fluorinated ketones, hydrofluoroethers, perfluoropolyethers, and perfluorocarbons, or low-viscosity modified silicone oils and high-flash-point synthetic polyalphaolefin insulating hydrocarbon coolants.

[0052] The water pump 3 can be equipped with a 7×7mm ultra-thin piezoelectric micro pump, a 280 / 370 series micro diaphragm self-priming pump, an NP010 / MPB003 micro magnetic gear pump, and a 5V horizontal micro brushless DC water pump, etc.

[0053] The first solenoid valve 8 can be a miniature two-position normally closed solenoid valve, a miniature three-way switching solenoid valve, a piezoelectric miniature solenoid valve, a small stepper electric ball valve, etc.

[0054] The controller can be selected from Qinheng CH32V003 and CH32V103C4T6 RISC-V architecture microcontrollers, Jihai APM32F030C8T6 and Lingdongwei MM32F001A1T6 Cortex-M0+ core 32-bit MCUs, Huimangwei FT62F0GCA-LRB, Shengxiwei MC32P7030 and Jinrui CA51F452L2 8-bit temperature control dedicated microcontrollers, as well as Microchip PIC16F1937-I / PT industrial-grade 8-bit microcontrollers, etc.

[0055] The temperature sensor 42 can be selected from MF52-103F3950, SMD0603-103 surface mount NTC thermistor, TMP36 analog temperature sensor 42, DS18B20 single bus digital temperature sensor 42, TMP102 I2C miniature digital temperature measurement chip, and 0805 packaged PT1000 platinum resistance thermometer, etc.

[0056] The spraying component 5 is mainly used for spraying insulating coolant. It can simply spray out the insulating coolant without any specific restrictions.

[0057] In one implementation, such as Figure 3 and Figure 4 and Figure 6 As shown, a cold plate 7 is also installed inside the housing 1, and the cold plate 7 can be installed at any position inside the housing 1. A second water flow channel 73 is laid inside the cold plate 7. The second water flow channel 73 can adopt a straight channel or a meandering channel structure according to the shape of the cold plate 7 to increase the heat exchange area inside the cold plate 7. The first water flow channel 6 and the second water flow channel 73 are respectively connected to the receiving box 2, and the receiving box 2, the first water flow channel 6, and the second water flow channel 73 are connected end-to-end and interconnected, forming a closed and interconnected second water circulation loop. The water pump 3 is installed at any position on the pipeline of the second water circulation loop to provide a stable driving force for the circulation of coolant throughout the loop.

[0058] During operation, the insulating coolant inside the housing 2 flows sequentially through the first water channel 6 and the second water channel 73 inside the cold plate 7 under the drive of the water pump 3, and finally returns to the housing 2, thereby realizing the circulating liquid cooling heat dissipation of the gallium nitride charger.

[0059] Preferably, the electronic control assembly 4 includes a circuit board 41, with a cold plate 7 abutting against the back of the circuit board 41. By having the cold plate 7 directly contact the circuit board 41, heat generated by the various components on the electronic control assembly 4 and conducted to the circuit board 41 is quickly dissipated, achieving heat dissipation and cooling of the various components on the electronic control assembly 4. Simultaneously, the heat dissipation effect is further enhanced in conjunction with the first water flow channel 6.

[0060] Furthermore, the second water channel 73 is S-shaped, which increases the contact area between the circuit board 41 and the insulating coolant, thereby further enhancing the heat dissipation effect.

[0061] Understandably, since the back of the circuit board 41 is generally uneven, direct contact between the cold plate 7 and the back of the circuit board 41 would result in gaps between them, affecting heat conduction efficiency. Therefore, thermal grease, thermal pads, thermal gel, or other materials can be used between the cold plate 7 and the circuit board 41 to increase the contact area and thus improve heat dissipation.

[0062] In one implementation, such as Figure 4 As shown, the spraying assembly 5 includes a nozzle 10 and a second solenoid valve 9. The second solenoid valve 9 is electrically connected to a controller, which controls its opening and closing. A water pump 3 is mounted between the first solenoid valve 8 and the outlet 22 of the container tank, allowing the insulating coolant inside the container tank 2 to be continuously pumped outwards by the water pump 3.

[0063] The spraying end of nozzle 10 is positioned towards the electronic control component 4 to ensure that the sprayed coolant accurately covers the heat source area. The water inlet pipe of nozzle 10 is connected to the pipe between the water pump outlet 32 ​​and the first solenoid valve 8, allowing the coolant output from water pump 3 to be diverted into one branch of nozzle 10. The second solenoid valve 9 is mounted at the nozzle inlet position and is used to independently control the on / off state of the spraying branch of nozzle 10, realizing individual on / off control of the spraying function and preventing insulating coolant from leaking from nozzle 10 before the preset temperature is reached.

[0064] This structure achieves reliable switching between two operating modes through dual solenoid valve partitioned water circuit control logic: When the temperature inside the housing 1 is within the normal range, the controller controls the second solenoid valve 9 to close and the first solenoid valve 8 to open, so that all the coolant output by the water pump 3 flows through the first water circulation loop, completing the normal closed-loop circulation liquid cooling heat dissipation, continuously removing the working heat of the electronic control component 4, and stabilizing the charging power output. When the temperature sensor 42 detects that the temperature inside the housing 1 exceeds the preset safety threshold, and determines that the equipment is overheating and there is a fire hazard, the controller controls the first solenoid valve 8 to close the main circulation water circuit, and at the same time opens the second solenoid valve 9, so that the insulating coolant delivered by the water pump 3 no longer enters the first water flow channel 6, but is all introduced into the nozzle 10 and precisely sprayed onto the high-temperature heat source position of the electronic control component 4. Utilizing the high heat absorption, insulation, and flame retardant properties of the insulating coolant, it quickly cools down, isolates oxygen, and extinguishes the initial open flame, effectively preventing thermal runaway and fire spread.

[0065] In one implementation, such as Figure 1 As shown, the side wall of the container 2 has a filling port 11 that communicates with the internal liquid storage space of the container 2. The filling port 11 extends to the outside of the housing 1 and is exposed. After some insulating coolant is sprayed out through the nozzle 10, the user can directly replenish the insulating coolant into the container 2 through the filling port 11 on the outside of the housing 1 without disassembling the charger housing 1. The coolant filling and replenishment operation is convenient and efficient. At the same time, the filling port 11 is equipped with a sealing plug. After filling, the filling port 11 is sealed to prevent coolant leakage during circulation, ensuring the airtightness of the overall water system and preventing leakage.

[0066] It should be understood that the container 2 can be detachably installed inside the housing 1, specifically by being fastened to the inner wall of the housing 1 with clips. The container 2 can also be fixedly connected to the housing 1, specifically by the container 2 being integrally formed with the housing 1, or by fixing the two together with screws and glue.

[0067] In one implementation, such as Figure 1 and Figure 3 As shown, the containment box 2 is fixedly installed inside the housing 1 and forms a stable connection structure with the housing 1. The containment box 2 is integrally formed with a mounting groove, and the electrical control components 4, water pump 3, temperature sensor 42, and controller are all integrated and assembled inside the mounting groove. By concentrating the various components in the mounting groove, the containment box 2 protects each component, preventing it from burning through the housing 1 and causing the fire to spread if any component catches fire. The insulating coolant inside the containment box 2 has a good flame-retardant effect, preventing further combustion. When the containment box 2 is burned through, the internal insulating cooling heat can also flow out to extinguish the fire.

[0068] Furthermore, the mounting slot is located in the middle of the receiving box 2 and extends through both opposite ends of the receiving box 2 to form mounting holes. The electronic control component 4, water pump 3, temperature sensor 42, and controller are all integrated and assembled inside the mounting slot. This effectively encloses the electronic control component 4, water pump 3, temperature sensor 42, and controller, further enhancing the protective effect.

[0069] Furthermore, the housing 2 and the charger housing 1 are integrated using a one-piece injection molding process, without any separate assembly or splicing structure. This results in high overall structural strength and good integrity. The one-piece molding structure eliminates the need for additional screws, clips, or glue to fix the housing 2, simplifying the overall assembly process, reducing the number of parts, and further compressing the space occupied.

[0070] In one implementation, such as Figure 5 As shown, an alarm 43 is also fixedly installed inside the housing 1. The alarm 43 is electrically connected to the controller, and its start and stop are controlled by the controller in real time. The alarm 43 can be a miniature buzzer alarm 43. When the device is charging normally, the alarm 43 is in a silent standby state with no additional sound or power output. When the internal temperature of the housing 1 collected in real time by the temperature sensor 42 exceeds the preset safe temperature threshold, the controller determines that the charger has seriously overheated. At the same time, while simultaneously controlling the water circuit to switch and starting the spray assembly to spray insulating coolant for cooling and fire extinguishing, the controller immediately triggers the alarm 43 to work, actively informing the user of the abnormal overheating fault status of the charger through continuous buzzing warning, and promptly reminding the user to disconnect the power and stop using the device.

[0071] In one embodiment, a magnetic suction device is fixedly installed on the outer wall of the housing 1, and a storage battery is also integrated inside the housing 1. The storage battery is electrically connected to the controller, which manages its charging and discharging. When the gallium nitride charger is connected to the mains power grid and is working normally, the controller detects the mains power input status and controls the external mains power to provide constant voltage and constant current supplementary charging and energy storage to the storage battery, so that the storage battery stores energy during the charging standby phase for subsequent auxiliary power supply.

[0072] The magnetic components can use neodymium iron boron micro magnetic patches, which can stably adhere to the magnetic structure on the back of the phone or the matching magnetic patches, enabling quick alignment and magnetic fixation between the casing and the phone. No additional clamping structure is required to complete the assembly of the charger and the phone, making assembly convenient and alignment precise.

[0073] This embodiment adds a magnetic attachment and a built-in battery, thereby enabling the gallium nitride charger to be magnetically attached to the mobile phone. The battery supplies power to the internal controller, water pump, and other electrical units of the gallium nitride charger, thereby achieving liquid cooling for the mobile phone.

[0074] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A gallium nitride charger, comprising a housing (1) and an electronic control assembly (4) assembled within the housing (1), characterized in that, Also includes: A container (2) is located inside the housing (1) and is used to hold insulating coolant; The first water channel (6) is laid on the shell (1) or inside the shell (1), and the inlet and outlet (61) of the first water channel are connected to the container (2) to form a first water circulation loop for cooling the inside of the shell (1). A water pump (3) is installed on the first water circulation loop to provide power for the insulating coolant to circulate in the first water circulation loop. A temperature sensor (42) is disposed inside the housing (1) for detecting the internal temperature of the housing (1); The spraying assembly (5) is connected to the container (2) and is used to spray the insulating coolant onto the electrical control assembly (4); The first solenoid valve (8) is located on the first water circulation loop and is used to control the opening and closing of the first water circulation loop. The controller is electrically connected to the water pump (3), temperature sensor (42), spray assembly (5), first solenoid valve (8) and electronic control assembly (4) respectively, so as to drive the water pump (3) to work and make the insulating coolant circulate in the first circulation loop. When the temperature detected by the temperature sensor (42) exceeds the preset threshold, the controller controls the first solenoid valve (8) to close, so that the water pump (3) supplies water to the spray assembly (5) and the spray assembly (5) sprays the insulating coolant to the electronic control assembly (4).

2. A gallium nitride charger according to claim 1, characterized in that, The first water channel (6) is laid along the periphery of the shell (1).

3. A gallium nitride charger according to claim 2, characterized in that, The first water flow channel (6) is S-shaped.

4. A gallium nitride charger according to claim 2, characterized in that, The housing (1) is also provided with a cold plate (7), and a second water channel (73) is laid inside the cold plate (7). The first water channel (6) and the second water channel (73) are respectively connected to the container (2), and the three are connected end to end to form a closed and connected second water circulation loop. The water pump (3) is located at any point on the second water circulation loop to provide driving force.

5. A gallium nitride charger according to claim 4, characterized in that, The electronic control component (4) includes a circuit board (41), and the cold plate (7) abuts against the back of the circuit board (41).

6. A gallium nitride charger according to claim 4, characterized in that, The second water flow channel (73) is S-shaped.

7. A gallium nitride charger according to claim 1, characterized in that, The spraying assembly (5) includes a nozzle (10) and a second solenoid valve (9), both of which are electrically connected to the controller. The water pump (3) is installed between the first solenoid valve (8) and the outlet (22) of the container tank; The nozzle (10) is positioned with its spray end facing the electronic control component (4), and the nozzle (10) is connected between the water pump outlet (32) and the first solenoid valve (8) so that the water pump (3) can deliver the insulating coolant in the accommodating cavity to the nozzle (10). The second solenoid valve (9) is mounted on one end of the nozzle inlet to control the opening and closing of the nozzle (10).

8. A gallium nitride charger according to claim 1, characterized in that, The container (2) has a liquid inlet (11) on one side that communicates with the internal space, and the liquid inlet (11) is exposed to the outside of the housing (1).

9. A gallium nitride charger according to claim 8, characterized in that, The container (2) is fixedly connected to the housing (1). The container (2) has a mounting slot. The electrical control component (4), water pump (3), temperature sensor (42) and controller are all assembled in the mounting slot.

10. A gallium nitride charger according to any one of claims 1 to 9, characterized in that, An alarm (43) is also provided inside the housing (1), and the alarm (43) is electrically connected to the controller.

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