Power supply circuit and disinfection box

Abstract

The utility model discloses a power supply circuit and a disinfection box, and relates to the technical field of disinfection boxes. The disinfection box comprises a disinfection circuit, and the power supply circuit comprises an alternating current power supply input end, a rectification filter circuit, a switching power supply circuit and a wireless charging circuit. Wherein the alternating-current power supply input end can input an alternating-current power supply and can be connected with a mains supply and other high-power power supplies, and the rectification filter circuit converts the input alternating-current power supply into a direct-current power supply, filters the direct-current power supply and outputs the direct-current power supply. The switching power supply circuit can carry out voltage conversion on the direct-current power supply output by the rectification filter circuit and then output the direct-current power supply so as to meet the voltage requirement required by the disinfection circuit and supply power to the disinfection circuit. The wireless charging circuit can obtain a power supply from the rectification filter circuit and convert the power supply into a wireless charging signal to be output so as to charge a charging device. The power supply circuit is connected with an alternating current power supply with higher power, and can provide high power output to the disinfection circuit and the wireless charging circuit at the same time.

Description

Technical Field

[0001] This utility model relates to the field of disinfection box technology, and in particular to a power supply circuit and a disinfection box. Background Technology

[0002] With a significant increase in public health awareness and a continuous rise in personal hygiene standards, sterilization boxes, as an important tool for maintaining the hygiene of daily necessities, are playing an increasingly crucial role in the field of personal care. Especially in the area of ​​oral hygiene equipment, such as widely used electric toothbrushes, proper sterilization after each use using a sterilization box has become a basic requirement to effectively prevent bacterial growth and ensure safe use.

[0003] Many sterilizing boxes on the market currently offer both sterilization and charging functions for cleaning devices such as electric toothbrushes. However, most existing sterilizing boxes rely on low-power power sources, such as built-in batteries or low-voltage interfaces like USB. Since simultaneously performing sterilization and charging increases energy consumption, this power supply method can easily lead to insufficient power, affecting the normal use of the device. Utility Model Content

[0004] The main purpose of this invention is to provide a power supply circuit that solves the problem of insufficient power supply caused by the current disinfection box's reliance on low-voltage power supply.

[0005] To achieve the above objectives, the power supply circuit proposed in this utility model is applied to a disinfection box, wherein the disinfection box includes a disinfection circuit, and the power supply circuit includes:

[0006] AC power input terminal, used for inputting AC power;

[0007] A rectifier and filter circuit, wherein the input terminal of the rectifier and filter circuit is connected to the input terminal of the AC power supply; the rectifier and filter circuit is used to convert the AC power supply into DC power supply and output it after filtering;

[0008] A switching power supply circuit, wherein the input terminal of the switching power supply circuit is connected to the first output terminal of the rectifier and filter circuit, and the output terminal of the switching power supply circuit is connected to the power supply terminal of the disinfection circuit, and the switching power supply circuit is used to convert the DC power supply into voltage and output it to power the disinfection circuit.

[0009] A wireless charging circuit is provided, wherein the input terminal of the wireless charging circuit is connected to the second output terminal of the rectifier and filter circuit, and the output terminal of the wireless charging circuit is used to wirelessly connect to the charging signal receiving terminal of the charging device; the wireless charging circuit is used to convert the DC power supply into a wireless charging signal output to power the charging device.

[0010] In one embodiment, the wireless charging circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a first capacitor, a second capacitor, a first diode, a first Zener diode, and a first inductor.

[0011] One end of the first resistor, one end of the first inductor, and one end of the first capacitor are connected to the first input terminal of the wireless charging circuit. The other end of the first resistor and one end of the second resistor are connected to the base of the first transistor. The collector of the first transistor and the other end of the first inductor are connected to one end of the fourth resistor. The emitter of the first transistor is connected to the anode of the first diode. The other end of the fourth resistor is connected to one end of the second capacitor. The other end of the second capacitor, the other end of the first capacitor, the cathode of the first diode, and one end of the third resistor are connected to the cathode of the first Zener diode. The other end of the second resistor, the other end of the third resistor, and the anode of the first Zener diode are connected to the second input terminal of the wireless charging circuit.

[0012] In one embodiment, the wireless charging circuit further includes a fifth resistor, a sixth resistor, a seventh resistor, a second transistor, a third capacitor, a second diode, a third diode, a second Zener diode, and a second inductor;

[0013] One end of the seventh resistor, one end of the third capacitor, and the other end of the second resistor are connected to the collector of the second transistor. The base of the second transistor and one end of the fifth resistor are connected to the positive terminal of the second Zener diode. The negative terminal of the second Zener diode is connected to one end of the sixth resistor. The other end of the sixth resistor is connected to the negative terminal of the third diode. The positive terminals of the third diode and the second diode are connected to one end of the second inductor. The other end of the seventh resistor is connected to the negative terminal of the second diode. The other end of the second inductor, the other end of the fifth resistor, the other end of the third capacitor, and the emitter of the second transistor are connected to the second input terminal of the wireless charging circuit.

[0014] In one embodiment, the switching power supply circuit includes a power management chip, a first transformer, an eighth resistor, a ninth resistor, a tenth resistor, a fourth diode, and a fifth diode;

[0015] The first primary terminal of the first transformer, one end of the eighth resistor, and one end of the ninth resistor are connected to the input terminal of the switching power supply circuit. The other end of the ninth resistor, the VCC pin of the power management chip, and the negative terminal of the fifth diode are connected. The other end of the eighth resistor is connected to the negative terminal of the fourth diode. The positive terminal of the fourth diode, the second primary terminal of the first transformer, and the OC pin of the power management chip are connected. The positive terminal of the fifth diode is connected to one end of the tenth resistor. The other end of the tenth resistor, the third primary terminal of the first transformer, and the FB pin of the power management chip are connected. The first primary terminal of the first transformer is the output terminal of the switching power supply circuit, and the second primary terminal of the first transformer is grounded.

[0016] In one embodiment, the rectifier filter circuit includes a sixth diode, a seventh diode, an eighth diode, a ninth diode, a tenth diode, an eleventh resistor, a fourth capacitor, a fifth capacitor, a third inductor, and a fourth inductor.

[0017] The anode of the sixth diode, the cathode of the eighth diode, and the anode of the tenth diode are connected to the first input terminal of the rectifier-filter circuit. The cathode of the tenth diode is connected to the first input terminal of the wireless charging circuit. The cathodes of the sixth and seventh diodes, one end of the eleventh resistor, and one end of the fourth capacitor are connected to one end of the third inductor. The other end of the third inductor, the other end of the eleventh resistor, and one end of the fifth capacitor are connected to the input terminal of the switching power supply circuit. The other end of the fourth capacitor, one end of the fourth inductor, and the anode of the eighth diode are connected to the anode of the ninth diode. The other end of the fifth capacitor is connected to the other end of the fourth inductor. The anodes of the seventh and ninth diodes, the cathode of the ninth diode, and the second input terminal of the rectifier-filter circuit are connected to the second input terminal of the wireless charging circuit.

[0018] In one embodiment, the power supply circuit further includes:

[0019] A protection circuit is connected in series between the AC power input terminal and the rectifier and filter circuit. The protection circuit is used to disconnect the connection between the AC power input terminal and the rectifier and filter circuit when the current value of the input AC power is greater than a preset current value.

[0020] This utility model also proposes a disinfection box, which includes a disinfection circuit and a power supply circuit as described above.

[0021] In one embodiment, the disinfection box further includes a lamp for generating the light source required for disinfection, and the disinfection circuit includes:

[0022] A boost converter circuit is provided, wherein the power input terminal of the boost converter circuit is connected to the switching power supply circuit, and the output terminal of the boost converter circuit is connected to the lamp; the boost converter circuit is used to convert the DC power output from the switching power supply circuit into AC drive power output; the AC drive power is used to drive the lamp.

[0023] The main control circuit has its first signal output terminal connected to the signal input terminal of the boost converter circuit, and the main control circuit is used to control the operation of the boost converter circuit.

[0024] In one embodiment, the boost converter circuit includes a switching transistor, a multivibrator, and a second transformer;

[0025] One end of the switching transistor is connected to the power input terminal of the boost converter circuit, and the other end of the switching transistor is connected to the input terminal of the multivibrator. The controlled terminal of the switching transistor is connected to the first signal output terminal of the main control circuit. The output terminal of the multivibrator is connected to the input terminal of the second transformer, and the output terminal of the second transformer is used to connect to the lamp.

[0026] In one embodiment, the disinfection box further includes a switch box magnetic structure, and the main control circuit includes:

[0027] A Hall effect switch circuit is provided, the power supply terminal of which is connected to the switching power supply circuit. The Hall effect switch circuit is used to detect the action of the magnetic structure of the switch box and output a corresponding switching signal. The switching signal is used to indicate whether the disinfection box is in an open or closed state.

[0028] The main controller has its power supply terminal connected to the switching power supply circuit, its signal output terminal connected to the signal input terminal of the boost converter circuit, and its signal input terminal connected to the signal output terminal of the Hall switch circuit.

[0029] The main controller is used to control the operation of the boost converter circuit according to the switching signal.

[0030] This utility model employs a power supply circuit for a disinfection box. The disinfection box includes a disinfection circuit, and the power supply circuit comprises an AC power input terminal, a rectifier and filter circuit, a switching power supply circuit, and a wireless charging circuit. The AC power input terminal accepts AC power. Compared to a low-power supply method that accepts a higher-power source, the rectifier and filter circuit converts the input AC power into DC power and filters it to ensure a clean and stable DC power output to subsequent circuits. The switching power supply circuit converts the rectified and filtered DC power to the voltage required by the disinfection circuit. This ensures that the disinfection circuit receives sufficient power even under high-energy-consumption conditions, thus maintaining its disinfection effect. The wireless charging circuit obtains DC power from the rectifier and filter circuit and converts it into a wireless charging signal output. This signal can be transmitted to a charging device to charge it. This power supply circuit accepts a higher-power AC power source, providing high-power output to both the disinfection and wireless charging circuits simultaneously. It enables both disinfection and charging functions, powering the device to be disinfected and improving the compatibility of the disinfection box. Thus, this invention can effectively solve the problem of insufficient power supply caused by the weak current power supply mode of traditional disinfection boxes. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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 the structures shown in these drawings without creative effort.

[0032] Figure 1 A schematic diagram of an embodiment of the power supply circuit provided by this utility model;

[0033] Figure 2 An electronic circuit diagram of an embodiment of the power supply circuit provided by this utility model.

[0034] Explanation of icon numbers:

[0035]

[0036] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0037] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0038] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0039] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] Many sterilizing boxes on the market currently offer both sterilization and charging functions for cleaning devices such as electric toothbrushes. However, most existing sterilizing boxes rely on low-power power sources, such as built-in batteries or power via USB or other low-voltage interfaces. Since simultaneous sterilization and charging increases energy consumption, using a low-voltage power supply can easily lead to insufficient power, affecting the normal operation of the device.

[0041] This utility model proposes a power supply circuit.

[0042] Please see Figure 1 In one embodiment of this utility model, the power supply circuit is applied to a disinfection box, which includes a disinfection circuit 40, and the power supply circuit includes:

[0043] AC power input terminal, used for inputting AC power;

[0044] The rectifier and filter circuit 10 has its input terminal connected to the AC power input terminal. The rectifier and filter circuit 10 is used to convert AC power into DC power and output it after filtering.

[0045] The input terminal of the switching power supply circuit 20 is connected to the first output terminal of the rectifier and filter circuit 10, and the output terminal of the switching power supply circuit 20 is connected to the power supply terminal of the disinfection circuit 40. The switching power supply circuit 20 is used to convert DC power into voltage and output it to power the disinfection circuit 40.

[0046] The wireless charging circuit 30 has its input terminal connected to the second output terminal of the rectifier and filter circuit 10, and its output terminal used to wirelessly connect to the charging signal receiver of the charging device. The wireless charging circuit 30 is used to convert DC power into a wireless charging signal output to power the charging device.

[0047] In this embodiment, the rectifier filter circuit 10 may include diode bridge rectifiers and capacitors, etc. The diode bridge rectifier converts AC power to DC power, and the capacitors smooth out voltage fluctuations after rectification. The switching power supply circuit 20 may include transformers, power switches, and control chips, etc. The transformer provides isolation and voltage conversion, and the control chip controls the switching frequency of the power switch to control the voltage conversion operation of the transformer. The wireless charging circuit 30 may include resonant inductors, resonant capacitors, and transistors, forming a self-excited oscillation circuit that generates an alternating current at a specific frequency, thereby forming a corresponding electromagnetic field. When the receiving end of the charging device approaches this magnetic field, a current is induced, completing the energy transfer from the transmitting end of the wireless charging circuit 30 to the receiving end of the charging device.

[0048] It should be noted that the charging device, which is also the device to be disinfected, can be any device that needs to be disinfected, such as an electric toothbrush, water flosser, razor, or children's toy, and there are no restrictions here.

[0049] In this embodiment, AC power is used as the input. For example, a 220V AC mains power supply can be connected, allowing for higher power supply options. Compared to relying on a built-in battery or USB interface, this provides more stable and sufficient power support. The rectifier-filter circuit 10 converts the input AC power into DC power and filters it to ensure a clean and stable DC power supply for subsequent circuits. The switching power supply circuit 20 converts the rectified and filtered DC power supply to meet the voltage requirements of the disinfection circuit 40. This ensures that the disinfection circuit 40 receives sufficient power even under high energy consumption conditions, thus not affecting its disinfection effect. The wireless charging circuit 30 obtains DC power from the rectifier-filter circuit 10 and converts it into a wireless charging signal output. This wireless charging signal can be transmitted to the device to be disinfected, such as charging an electric toothbrush. The charging device can receive the wireless charging signal through its own wireless signal receiver and convert it into charging power for charging. Because this power supply circuit can connect to a higher-power power source, it can simultaneously provide high-power output to both the disinfection circuit 40 and the wireless charging circuit 30. This allows for simultaneous disinfection and charging, powering the device to be disinfected and improving the compatibility of the disinfection box. Therefore, compared to existing technologies, the power supply circuit provided in this embodiment effectively solves the power shortage problem caused by the low-voltage power supply mode in traditional disinfection boxes. Furthermore, the disinfection box provided in this embodiment has both wireless charging and disinfection functions, making it convenient for users.

[0050] In this invention, AC power is used as the input. For example, a 220V AC mains power supply can be connected, allowing for higher power supply options. Compared to relying on a built-in battery or USB interface, this provides more stable and sufficient power support. The rectifier-filter circuit 10 converts the input AC power into DC power and filters it to ensure a clean and stable DC power supply for subsequent circuits. The switching power supply circuit 20 converts the rectified and filtered DC power supply to meet the voltage requirements of the disinfection circuit 40. This ensures that the disinfection circuit 40 receives sufficient power even under high energy consumption conditions, thus maintaining its disinfection effect. The wireless charging circuit 30 obtains DC power from the rectifier-filter circuit 10 and converts it into a wireless charging signal output. This signal can be transmitted to the device to be disinfected, such as an electric toothbrush. The charging device can receive the wireless charging signal through its own wireless signal receiver and convert it into charging power for charging. Because this power supply circuit can connect to a higher-power power source, it can simultaneously provide high-power output to both the disinfection circuit 40 and the wireless charging circuit 30. This allows for simultaneous disinfection and charging, powering the device to be disinfected and improving the compatibility of the disinfection box. Thus, compared to existing technologies, the power supply circuit provided by this invention effectively solves the problem of insufficient power supply caused by the low-voltage power supply mode in traditional disinfection boxes. Furthermore, the disinfection box provided by this invention has both wireless charging and disinfection functions, making it convenient for users.

[0051] Please see Figure 2 In one embodiment of the present invention, the wireless charging circuit 30 includes a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a first transistor Q1, a first capacitor C1, a second capacitor C2, a first diode D1, a first Zener diode DW1, and a first inductor L1.

[0052] One end of the first resistor R1, one end of the first inductor L1, and one end of the first capacitor C1 are connected to the first input terminal of the wireless charging circuit 30. The other end of the first resistor R1 and one end of the second resistor R2 are connected to the base of the first transistor Q1. The collector of the first transistor Q1 and the other end of the first inductor L1 are connected to one end of the fourth resistor R4. The emitter of the first transistor Q1 is connected to the anode of the first diode D1. The other end of the fourth resistor R4 is connected to one end of the second capacitor C2. The other end of the second capacitor C2, the other end of the first capacitor C1, the cathode of the first diode D1, and one end of the third resistor R3 are connected to the cathode of the first Zener diode DW1. The other ends of the second resistor R2, the other end of the third resistor R3, and the anode of the first Zener diode DW1 are connected to the second input terminal of the wireless charging circuit 30.

[0053] In this embodiment, power enters the circuit through the first input terminal, flows through the first resistor R1 and the first inductor L1, and simultaneously charges the first capacitor C1. The first resistor R1 and the second resistor R2 form a voltage divider network, providing a bias voltage to the base of the first transistor Q1. When a certain threshold is reached, the first transistor Q1 begins to conduct. When the first transistor Q1 is conducting, current flows from the first inductor L1 to the collector of the first transistor Q1, and then through the emitter to the first diode D1. As the current flows, the first inductor L1 and the first capacitor C1 begin to form an LC resonant circuit, generating an oscillation frequency. The first Zener diode DW1 plays a protective role in the circuit, preventing excessive voltage from damaging the circuit. The first diode D1 can prevent reverse current from damaging the first transistor Q1. The fourth resistor R4 and the second capacitor C2, combined, can further help stabilize the output voltage and participate in regulating the operating state of the entire oscillation circuit. In this embodiment, the wireless charging circuit 30 may also include resistors R13 to R15, capacitors C7 and C8, to further stabilize the circuit's operating state. Thus, this embodiment can convert the input power into a wireless charging signal output to power the charging device.

[0054] Please see Figure 2 In one embodiment of the present invention, the wireless charging circuit 30 further includes a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, a second transistor Q2, a third capacitor C3, a second diode D2, a third diode D3, a second Zener diode DW2, and a second inductor L2.

[0055] One end of the seventh resistor R7, one end of the third capacitor C3, and the other end of the second resistor R2 are connected to the collector of the second transistor Q2. The base of the second transistor Q2 and one end of the fifth resistor R5 are connected to the positive terminal of the second Zener diode DW2. The negative terminal of the second Zener diode DW2 is connected to one end of the sixth resistor R6. The other end of the sixth resistor R6 is connected to the negative terminal of the third diode D3. The positive terminals of the third diode D3 and the second diode D2 are connected to one end of the second inductor L2. The other end of the seventh resistor R7 is connected to the negative terminal of the second diode D2. The other end of the second inductor L2, the other end of the fifth resistor R5, the other end of the third capacitor C3, and the emitter of the second transistor Q2 are connected to the second input terminal of the wireless charging circuit 30.

[0056] In this embodiment, the wireless charging circuit 30 is a dual-channel wireless transmitting oscillation circuit. When the charging device is near the disinfection box and the battery is not fully charged, the dual-channel wireless transmitting oscillation circuit can sense the corresponding magnetic field change. The first transistor Q1 turns on, and current flows from the power supply into the first inductor L1, and then through the collector of the first transistor Q1 to the emitter. At this time, the LC resonant circuit formed by the first capacitor C1 and the first inductor L1 works, generating a high-frequency oscillation signal. As the current flows through the first inductor L1, a changing magnetic field is generated around the first inductor L1. Due to the effect of the LC resonant circuit, the generated oscillation signal affects the base voltage of the second transistor Q2. When the base voltage of the second transistor Q2 reaches the conduction threshold, the second transistor Q2 begins to conduct, while the first transistor Q1 gradually turns off. At this time, current flows into the second inductor L2, and then through the collector of the second transistor Q2 to the emitter. The other LC resonant circuit formed by the third capacitor C3 and the second inductor L2 begins to work, generating a high-frequency oscillation signal. As current flows through the second inductor L2, a changing magnetic field is generated around it. Due to the influence of the LC resonant circuit on the base voltages of the two transistors, they alternately conduct and cut off. This alternating operating mode causes current to flow alternately between the first inductor L1 and the second inductor L2, thereby generating a stable high-frequency alternating magnetic field in the transmitting coil. The fifth resistor R5, the sixth resistor R6, and the seventh resistor R7 can be used for current limiting; the second diode D2 and the third diode D3 provide circuit protection against damage from reverse current; and the second Zener diode DW2 acts as a protector to prevent damage from excessive voltage. In this embodiment, the wireless charging circuit 30 may also include resistors R17 and R18, and capacitors C9 and C10 to further stabilize the circuit's operating state. Thus, this embodiment can convert the input power supply into a wireless charging signal output and improve the power of wireless charging. Compared to disinfection boxes powered by low voltage, this embodiment combines a high-voltage power supply with a dual-path wireless transmitting oscillation circuit, improving the speed of wireless charging.

[0057] Please see Figure 2 In one embodiment of the present invention, the switching power supply circuit 20 includes a power management chip U1, a first transformer T1, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a fourth diode D4, and a fifth diode D5.

[0058] The first primary terminal of the first transformer T1, one end of the eighth resistor R8, and one end of the ninth resistor R9 are connected to the input terminal of the switching power supply circuit 20. The other end of the ninth resistor R9, the VCC pin of the power management chip U1, and the negative terminal of the fifth diode D5 are connected. The other end of the eighth resistor R8 is connected to the negative terminal of the fourth diode D4. The positive terminal of the fourth diode D4, the second primary terminal of the first transformer T1, and the OC pin of the power management chip U1 are connected. The positive terminal of the fifth diode D5 is connected to one end of the tenth resistor R10. The other end of the tenth resistor R10, the third primary terminal of the first transformer T1, and the FB pin of the power management chip U1 are connected. The first primary terminal of the first transformer T1 is the output terminal of the switching power supply circuit 20, and the second primary terminal of the first transformer T1 is grounded.

[0059] In this embodiment, the input terminal of the switching power supply circuit 20 is connected to the first primary terminal of the first transformer T1, one end of the eighth resistor R8, and one end of the ninth resistor R9. Power enters the circuit through these paths. A portion of the input voltage provides the operating voltage to the power management chip U1 through the ninth resistor R9. The FB pin of the power management chip U1 can detect the voltage level fed back from the second primary coil of the transformer and adjust the switching frequency of the internal switching transistor according to the feedback signal. The OC pin adjusts the grounding frequency of the first primary coil to adjust the current in the first primary coil of the first transformer T1, thereby affecting the current in the secondary coil of the first transformer T1 and adjusting the voltage output of the first transformer T1. The tenth resistor R10 can be used for current limiting, and the fourth diode D4 and the fifth diode D5 can prevent reverse current from damaging the power management chip U1. In this embodiment, the second terminal of the second primary coil of the first transformer T1 is grounded through capacitor C14. The switching power supply circuit 20 may also include diode D11, capacitors C11 to C14, and resistors R19 to R24, which helps stabilize the circuit's operating state.

[0060] Please see Figure 2 In one embodiment of this utility model, the rectifier filter circuit 10 includes a sixth diode D6, a seventh diode D7, an eighth diode D8, a ninth diode D9, a tenth diode D10, an eleventh resistor R11, a fourth capacitor C4, a fifth capacitor C5, a third inductor L3, and a fourth inductor L4.

[0061] The anode of the sixth diode D6, the cathode of the eighth diode D8, and the anode of the tenth diode D10 are connected to the first input terminal of the rectifier filter circuit 10. The cathode of the tenth diode D10 is connected to the first input terminal of the wireless charging circuit 30. The cathode of the sixth diode D6, the cathode of the seventh diode D7, one end of the eleventh resistor R11, and one end of the fourth capacitor C4 are connected to one end of the third inductor L3. The other end of the third inductor L3, the other end of the eleventh resistor R11, and one end of the fifth capacitor C5 are connected to the input terminal of the switching power supply circuit 20. The other end of the fourth capacitor C4, one end of the fourth inductor L4, the anode of the eighth diode D8, and the anode of the ninth diode D9 are connected. The other end of the fifth capacitor C5 is connected to the other end of the fourth inductor L4. The anode of the seventh diode D7, the cathode of the ninth diode D9, and the second input terminal of the rectifier filter circuit 10 are connected to the second input terminal of the wireless charging circuit 30.

[0062] In this embodiment, the sixth diode D6, the seventh diode D7, the eighth diode D8, the ninth diode D9, and the tenth diode D10 are used to rectify the input AC power to output DC power. The fourth capacitor C4 and the fifth capacitor C5 can be electrolytic capacitors, which can filter the DC power to make the output smoother. The third inductor L3, the fourth inductor L4, and the eleventh resistor R11 further filter out high-frequency noise, ensuring that the final output DC power is sufficiently pure and stable. In this embodiment, the rectifier-filter circuit 10 may also include capacitor C6 to further filter the DC power output to the wireless charging circuit 30.

[0063] Please see Figure 2 In one embodiment of this utility model, the power supply circuit further includes:

[0064] Protection circuit 50 is connected in series between AC power input terminal and rectifier filter circuit 10. Protection circuit 50 is used to disconnect the connection between AC power input terminal and rectifier filter circuit 10 when the current value of input AC power is greater than the preset current value.

[0065] In this embodiment, the protection circuit 50 may include a fuse Fu, an adjustable resistor RV, a resistor R12 and a resistor R32. When the current is greater than a preset current value, the fuse Fu will be blown to disconnect the connection between the power input terminal and the rectifier filter circuit 10.

[0066] This utility model also proposes a disinfection box, which includes a disinfection circuit 40 and a power supply circuit. The specific structure of the power supply circuit is as described in the above embodiments. Since this disinfection box adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0067] Please see Figure 2 In one embodiment of this utility model, the disinfection box further includes a lamp for generating the light source required for disinfection, and the disinfection circuit 40 includes:

[0068] The boost converter circuit 41 has its power input terminal connected to the switching power supply circuit 20 and its output terminal connected to the lamp. The boost converter circuit 41 is used to convert the DC power output from the switching power supply circuit 20 into AC drive power output. The AC drive power is used to drive the lamp.

[0069] The main control circuit 42 has its first signal output terminal connected to the signal input terminal of the boost converter circuit 41. The main control circuit 42 is used to control the operation of the boost converter circuit 41.

[0070] In one embodiment, the boost converter circuit 41 includes a switching transistor, a multivibrator AM, and a second transformer T2;

[0071] One end of the switching transistor is connected to the power input terminal of the boost converter circuit 41, and the other end of the switching transistor is connected to the input terminal of the multivibrator AM. The controlled terminal of the switching transistor is connected to the first signal output terminal of the main control circuit 42. The output terminal of the multivibrator AM is connected to the input terminal of the second transformer T2. The output terminal of the second transformer T2 is used to connect to the lamp.

[0072] In this embodiment, the lamp can be a UV lamp. The first signal output terminal of the main control circuit 42 can send a PWM signal to the controlled terminal of the switching transistor, so that the current enters the multivibrator AM in the form of high-frequency pulses, thereby controlling the multivibrator AM to generate a high-frequency voltage signal. This signal is then boosted by the second transformer T2, and finally outputs a high-frequency, high-voltage UV drive signal to the UV lamp to drive it to emit ultraviolet light for disinfection. In this embodiment, the boost converter circuit 41 may also include resistors R29 to R31, inductor L5, and capacitors C21 to C22 to stabilize the circuit operation. The multivibrator AM may include transistors Q4 to Q5 and capacitor C20. During operation, one transistor is in the conducting state, and the other transistor is in the cutoff state. The capacitor charges and discharges to generate a high-frequency voltage signal. Thus, this embodiment can convert the DC power output from the switching power supply circuit 20 into an AC drive power output.

[0073] Please see Figure 2 In one embodiment of this utility model, the disinfection box further includes a switch box magnetic structure, and the main control circuit 42 includes:

[0074] The Hall effect switch circuit is connected to the power supply circuit 20. The Hall effect switch circuit is used to detect the action of the magnetic structure of the switch box and output the corresponding switch signal. The switch signal is used to indicate whether the disinfection box is in the open or closed state.

[0075] The main controller U3 has its power supply terminal connected to the switching power supply circuit 20, its signal output terminal connected to the signal input terminal of the boost converter circuit 41, and its signal input terminal connected to the signal output terminal of the Hall switch circuit.

[0076] The main controller U3 is used to control the operation of the boost converter circuit 41 according to the switching signal.

[0077] In the magnetic structure of the switch box, a magnet is mounted on a moving part of the switch box, such as a cover or door. When the cover is closed or opened, the position of the magnet relative to the Hall switch circuit changes, causing the Hall switch circuit to detect the change in magnetic field and output different switching signals accordingly.

[0078] In this embodiment, the Hall switch circuit may include a Hall chip U2, a resistor R27, and a capacitor C17. It can generate a corresponding switch signal based on the detected magnetic field changes of the switch box's magnetic structure. For example, when the disinfection box is closed, the Hall chip U2 detects a magnetic field strength greater than a preset magnetic field strength and outputs a high-level signal; when the disinfection box is open, the Hall chip U2 detects a magnetic field strength less than or equal to the preset magnetic field strength and outputs a low-level signal. This switch signal is then transmitted to the main controller U3 to determine the state of the disinfection box. If the main controller U3 determines that the disinfection box is closed via the switch signal, it controls the boost converter circuit 41 to operate, thereby illuminating the lamp for disinfection. The main controller U3 can control the operating time of the boost converter circuit 41, for example, 10 minutes, and control the boost converter circuit 41 to stop operating after the preset disinfection time. If it is determined that the disinfection box is open, it immediately controls the boost converter circuit 41 to stop operating and can restart the calculation of the preset disinfection time. Thus, this embodiment can prevent the lamp from emitting ultraviolet light or other light sources that could affect the user's health when the disinfection box is open.

[0079] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A power supply circuit, characterized by comprising: Applied to a disinfection box, the disinfection box includes a disinfection circuit, and the power supply circuit includes: AC power input terminal, used for inputting AC power; A rectifier and filter circuit, wherein the input terminal of the rectifier and filter circuit is connected to the input terminal of the AC power supply; the rectifier and filter circuit is used to convert the AC power supply into DC power supply and output it after filtering; A switching power supply circuit, wherein the input terminal of the switching power supply circuit is connected to the first output terminal of the rectifier and filter circuit, and the output terminal of the switching power supply circuit is connected to the power supply terminal of the disinfection circuit, and the switching power supply circuit is used to convert the DC power supply into voltage and output it to power the disinfection circuit. A wireless charging circuit is provided, wherein the input terminal of the wireless charging circuit is connected to the second output terminal of the rectifier and filter circuit, and the output terminal of the wireless charging circuit is used to wirelessly connect to the charging signal receiving terminal of the charging device; the wireless charging circuit is used to convert the DC power supply into a wireless charging signal output to power the charging device.

2. The power supply circuit as described in claim 1, characterized in that, The wireless charging circuit includes a first resistor, a second resistor, a third resistor, a fourth resistor, a first transistor, a first capacitor, a second capacitor, a first diode, a first Zener diode, and a first inductor. One end of the first resistor, one end of the first inductor, and one end of the first capacitor are connected to the first input terminal of the wireless charging circuit. The other end of the first resistor and one end of the second resistor are connected to the base of the first transistor. The collector of the first transistor and the other end of the first inductor are connected to one end of the fourth resistor. The emitter of the first transistor is connected to the anode of the first diode. The other end of the fourth resistor is connected to one end of the second capacitor. The other end of the second capacitor, the other end of the first capacitor, the cathode of the first diode, and one end of the third resistor are connected to the cathode of the first Zener diode. The other end of the second resistor, the other end of the third resistor, and the anode of the first Zener diode are connected to the second input terminal of the wireless charging circuit.

3. The power supply circuit of claim 2, wherein, The wireless charging circuit also includes a fifth resistor, a sixth resistor, a seventh resistor, a second transistor, a third capacitor, a second diode, a third diode, a second Zener diode, and a second inductor; One end of the seventh resistor, one end of the third capacitor, and the other end of the second resistor are connected to the collector of the second transistor. The base of the second transistor and one end of the fifth resistor are connected to the positive terminal of the second Zener diode. The negative terminal of the second Zener diode is connected to one end of the sixth resistor. The other end of the sixth resistor is connected to the negative terminal of the third diode. The positive terminals of the third diode and the second diode are connected to one end of the second inductor. The other end of the seventh resistor is connected to the negative terminal of the second diode. The other end of the second inductor, the other end of the fifth resistor, the other end of the third capacitor, and the emitter of the second transistor are connected to the second input terminal of the wireless charging circuit.

4. The power supply circuit of claim 1, wherein, The switching power supply circuit includes a power management chip, a first transformer, an eighth resistor, a ninth resistor, a tenth resistor, a fourth diode, and a fifth diode; The first primary terminal of the first transformer, one end of the eighth resistor, and one end of the ninth resistor are connected to the input terminal of the switching power supply circuit. The other end of the ninth resistor, the VCC pin of the power management chip, and the negative terminal of the fifth diode are connected. The other end of the eighth resistor is connected to the negative terminal of the fourth diode. The positive terminal of the fourth diode, the second primary terminal of the first transformer, and the OC pin of the power management chip are connected. The positive terminal of the fifth diode is connected to one end of the tenth resistor. The other end of the tenth resistor, the third primary terminal of the first transformer, and the FB pin of the power management chip are connected. The first primary terminal of the first transformer is the output terminal of the switching power supply circuit, and the second primary terminal of the first transformer is grounded.

5. The power supply circuit of claim 1, wherein, The rectifier filter circuit includes a sixth diode, a seventh diode, an eighth diode, a ninth diode, a tenth diode, an eleventh resistor, a fourth capacitor, a fifth capacitor, a third inductor, and a fourth inductor. The anode of the sixth diode, the cathode of the eighth diode, and the anode of the tenth diode are connected to the first input terminal of the rectifier-filter circuit. The cathode of the tenth diode is connected to the first input terminal of the wireless charging circuit. The cathodes of the sixth and seventh diodes, one end of the eleventh resistor, and one end of the fourth capacitor are connected to one end of the third inductor. The other end of the third inductor, the other end of the eleventh resistor, and one end of the fifth capacitor are connected to the input terminal of the switching power supply circuit. The other end of the fourth capacitor, one end of the fourth inductor, and the anode of the eighth diode are connected to the anode of the ninth diode. The other end of the fifth capacitor is connected to the other end of the fourth inductor. The anodes of the seventh and ninth diodes, the cathode of the ninth diode, and the second input terminal of the rectifier-filter circuit are connected to the second input terminal of the wireless charging circuit.

6. The power supply circuit of claim 1, wherein, The power supply circuit also includes: A protection circuit is connected in series between the AC power input terminal and the rectifier and filter circuit. The protection circuit is used to disconnect the connection between the AC power input terminal and the rectifier and filter circuit when the current value of the input AC power is greater than a preset current value.

7. A sterilization cassette characterized by, The disinfection box includes a disinfection circuit and a power supply circuit as described in any one of claims 1 to 6.

8. The sterilization box of claim 7, wherein, The disinfection box also includes a lamp for generating the light source required for disinfection, and the disinfection circuit includes: A boost converter circuit is provided, wherein the power input terminal of the boost converter circuit is connected to the switching power supply circuit, and the output terminal of the boost converter circuit is connected to the lamp; the boost converter circuit is used to convert the DC power output from the switching power supply circuit into AC drive power output; the AC drive power is used to drive the lamp. The main control circuit has its first signal output terminal connected to the signal input terminal of the boost converter circuit, and the main control circuit is used to control the operation of the boost converter circuit.

9. The sterilization box of claim 8, wherein, The boost converter circuit includes a switching transistor, a multivibrator, and a second transformer; One end of the switching transistor is connected to the power input terminal of the boost converter circuit, and the other end of the switching transistor is connected to the input terminal of the multivibrator. The controlled terminal of the switching transistor is connected to the first signal output terminal of the main control circuit. The output terminal of the multivibrator is connected to the input terminal of the second transformer, and the output terminal of the second transformer is used to connect to the lamp.

10. The sterilization cassette of claim 8, wherein, The disinfection box also includes a magnetic structure for a switch box, and the main control circuit includes: A Hall effect switch circuit is provided, the power supply terminal of which is connected to the switching power supply circuit. The Hall effect switch circuit is used to detect the action of the magnetic structure of the switch box and output a corresponding switching signal. The switching signal is used to indicate whether the disinfection box is in an open or closed state. The main controller has its power supply terminal connected to the switching power supply circuit, its signal output terminal connected to the signal input terminal of the boost converter circuit, and its signal input terminal connected to the signal output terminal of the Hall switch circuit. The main controller is used to control the operation of the boost converter circuit according to the switching signal.

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