Self-powered ultraviolet sterilization and disinfection system for outlet pipe

Abstract

A self-powered ultraviolet sterilization and disinfection system for a water outlet pipe provided by the present invention includes a water pipe section, and the water pipe section is connected between a water pipe and a faucet; the water pipe section is provided with an ultraviolet sterilization system for sterilizing and disinfecting the discharged water; the ultraviolet sterilization and disinfection system includes an ultraviolet LED sterilization lamp, a water flow sensor, a DC power supply VCC, a micro water flow generator, an impeller, an LED driving circuit, a start control circuit, a lithium battery, a charging circuit, and a lithium battery power supply control circuit; the impeller is arranged inside the water pipe section, and the axis of the impeller is perpendicular to but does not intersect with the axis of the water pipe section, and the micro water flow generator is driven by the impeller to generate electricity; it can effectively disinfect and sterilize the discharged water of the water supply pipe, has a simple structure, and on the other hand, can convert the energy generated by the water flow into electric energy and collect it.

Description

Technical Field

[0001] The present invention relates to a sterilization and disinfection system, and particularly to a self-powered ultraviolet sterilization and disinfection system for a water outlet pipe. Background Art

[0002] Water is an essential substance for people's production and life, and people are increasingly concerned about the quality of domestic water. In particular, bacteria and viruses contained in water will seriously affect people's health if the tap water is not sterilized and disinfected. In the prior art, the following means are generally adopted for the sterilization and disinfection of domestic water: heating and boiling, and specially setting up disinfection equipment; heating and boiling is generally for people to drink, but for ordinary water use, such as washing hands and vegetables, heating and boiling and then cooling will bring great trouble to people. Although there is also special disinfection equipment in the prior art, the existing disinfection equipment is bulky, complex in structure, and extremely inconvenient to use; on the other hand, the power supply for the water pipe during the sterilization process is mains power supply, and there is energy in the flowing water, but currently this energy is not collected and applied to the sterilization and disinfection of the water pipe.

[0003] Therefore, in order to solve the above problems, it is urgent to propose a new technical means. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a self-powered ultraviolet sterilization and disinfection system for a water outlet pipe. On the one hand, it can effectively sterilize and disinfect the water discharged from the water pipe, thereby providing protection for people's physical health, and it is convenient to use and simple in structure, only need to turn on and off the faucet during use. On the other hand, it can convert the energy generated by the water flow into electric energy and collect it, and apply it to the sterilization and disinfection of the water pipe, thereby saving energy.

[0005] A self-powered ultraviolet sterilization and disinfection system for a water outlet pipe provided by the present invention includes a water pipe section, and the water pipe section is connected between the water pipe and the faucet;

[0006] The water pipe section is provided with an ultraviolet sterilization system for sterilizing and disinfecting the discharged water;

[0007] The ultraviolet sterilization and disinfection system includes an ultraviolet LED sterilization lamp, a water flow sensor, a DC power supply VCC, a micro water flow generator, an impeller, an LED driving circuit, a start control circuit, a lithium battery, a charging circuit, and a lithium battery power supply control circuit;

[0008] The impeller is arranged in the water pipe section, and the axis of the impeller is perpendicular to but does not intersect the axis of the water pipe section, and the micro water flow generator is driven by the impeller to generate electricity;

[0009] The input end of the startup control circuit is connected to the output end VCC1 of the lithium battery power supply control circuit. The output end Vout of the startup control circuit is connected to the power input end of the LED driving circuit. The control input end of the startup control circuit is connected to the output end of the water flow sensor. The control output end Vo of the startup control circuit is connected to the control input end of the LED driving circuit. The LED driving circuit outputs different driving currents to the ultraviolet LED germicidal lamp according to the control signal output by the startup control circuit. The water flow sensor is arranged between the water pipe section and the faucet. The input end of the charging circuit is connected to the output end of the micro water flow generator. The output end of the charging circuit is connected to the input end of the lithium battery. The output end of the lithium battery is connected to the first input end of the lithium battery power supply control circuit. The second input end of the lithium battery power supply control circuit is connected to the DC power supply VCC.

[0010] Further, the LED driving circuit includes a comparison control circuit and a constant current circuit;

[0011] The control input end of the comparison control circuit is connected to the control output end of the startup control circuit. The control output end of the comparison control circuit is connected to the control input end of the constant current circuit. The power input end of the constant current circuit is connected to the output end Vout of the startup control circuit. The power output end of the constant current circuit supplies power to the ultraviolet LED germicidal lamp.

[0012] Further, the comparison control circuit includes a resistor R7, a resistor R8, a resistor R9, a comparator U2, and a comparator U3;

[0013] The non-inverting end of the comparator U2 is connected to the control output end of the startup control circuit. The output end of the comparator U2 serves as the first output end of the comparison control circuit and is connected to the first control input end of the constant current circuit. The inverting end of the comparator U2 is connected to the output end VCC1 of the lithium battery charging and power supply control through the resistor R7. The inverting end of the comparator U2 is connected to the ground through the series connection of the resistor R8 and the resistor R9. The common connection point between the resistor R8 and the resistor R9 is connected to the inverting end of the comparator U3. The non-inverting end of the comparator U3 is connected to the control output end of the startup control circuit. The output end of the comparator U3 serves as the second output end of the startup control circuit and is connected to the second control input end of the constant current circuit.

[0014] Further, the constant current circuit includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a capacitor C1, an operational amplifier U4, an operational amplifier U5, an operational amplifier U6, a triode T2, a triode T3, and a triode T4;

[0015] The non-inverting input terminal of operational amplifier U4 is connected to one end of resistor R10, and the other end of resistor R10 serves as the power input terminal of the constant current circuit. The output terminal of operational amplifier U4 is respectively connected to one end of resistor R13, resistor R14, and resistor R15. The other end of resistor R13 is connected to the collector of triode T2, the other end of resistor R14 is connected to the collector of triode T3, and the other end of resistor R15 is connected to the collector of triode T4. The emitters of triode T2, triode T3, and triode T4 are all connected to the non-inverting input terminal of operational amplifier U6. The common connection point between the non-inverting input terminal of operational amplifier U6 and the emitter of triode T2 serves as the power output terminal of the constant current circuit. The base of triode T2 is the first control input terminal of the constant current circuit, the base of triode T3 is the second control input terminal of the constant current circuit, the base of triode T4 is connected to one end of resistor R16, and the other end of resistor R16 serves as the third control input terminal of the constant current circuit and is connected to the control output terminal of the start control circuit. The inverting input terminal of operational amplifier U6 is connected to the output terminal of operational amplifier U6. The output terminal of operational amplifier U6 is connected to the inverting input terminal of operational amplifier U5 through resistor R11. The non-inverting input terminal of operational amplifier U5 is connected to the output terminal of operational amplifier U4. The inverting input terminal of operational amplifier U5 is connected to the output terminal of operational amplifier U5 through resistor R12 and capacitor C1 in parallel. The output terminal of operational amplifier U5 is connected to the inverting input terminal of operational amplifier U4.

[0016] Further, the start control circuit includes resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, triode T1, PMOS transistor Q1, and operational amplifier U1;

[0017] The source electrode of PMOS transistor Q1 serves as the input terminal of the start control circuit and is connected to the output terminal VCC1 of the lithium battery power supply control circuit. The drain electrode of PMOS transistor Q1 serves as the power output terminal Vout of the start control circuit and is connected to the power input terminal of the constant current circuit. The source electrode of PMOS transistor Q1 is connected to the gate electrode of PMOS transistor Q1 through resistor R2. The gate electrode of PMOS transistor Q1 is connected to the collector of triode T1 through resistor R3. The emitter of triode T1 is grounded. The base of triode T1 is connected to the output terminal of operational amplifier U1 through resistor R4. The output terminal of operational amplifier U1 is grounded through resistor R5 and resistor R6 in series. The inverting input terminal of operational amplifier U1 is connected to the common connection point between resistor R5 and resistor R6. The non-inverting input terminal of operational amplifier U1 is connected to the output terminal of the water flow sensor. The output terminal of operational amplifier U1 serves as the control output terminal Vo of the start control circuit.

[0018] Further, the charging circuit includes diode D1, diode D2, capacitor C2, capacitor C3, resistor R17, resistor R18, PMOS transistor Q2, triode T5, and zener diode ZD1;

[0019] The positive electrode of the diode D1 is connected to the output end of the micro water flow generator as the input end of the charging circuit. The negative electrode of the diode D2 is grounded through the capacitor C2. The common connection point between the diode D2 and the capacitor C2 is connected to the source electrode of the PMOS transistor Q2. The drain electrode of the PMOS transistor Q2 is connected to the positive electrode of the diode D2. The negative electrode of the diode D2 is connected to the lithium battery as the output end of the charging circuit;

[0020] The source electrode of the PMOS transistor Q2 is connected to the gate electrode of the PMOS transistor Q2 through the resistor R17. The gate electrode of the PMOS transistor Q2 is connected to the collector electrode of the triode T5. The collector electrode of the triode T5 is connected to one end of the resistor R18. The other end of the resistor R18 is grounded through the capacitor C3. The common connection point between the resistor R18 and the capacitor C3 is connected to the base electrode of the triode T5. The emitter electrode of the triode T5 is grounded. The drain electrode of the PMOS transistor Q2 is connected to the negative electrode of the voltage stabilizing diode ZD1. The positive electrode of the voltage stabilizing diode ZD1 is grounded. The drain electrode of the PMOS transistor Q2 is connected to the positive electrode of the diode D3. The negative electrode of the diode D3 is connected to the base electrode of the triode T5.

[0021] Furthermore, the lithium battery power supply control circuit includes a triode T6, a triode T7, a triode T8, a triode T9, a triode T11, a PMOS transistor Q3, an NMOS transistor Q4, a thyristor SCR1, a resistor R19, a resistor R20, a resistor R21, a resistor R22, a resistor R23, a resistor R24, a resistor R28, a variable resistor RT1, a variable resistor RT2, a diode D4, and a diode D6;

[0022] The emitter of the triode T6 is connected to the emitter of the triode T7. The common connection point between the emitter of the triode T7 and the emitter of the triode T6 is connected to the lithium battery. The collector of the triode T6 is connected to the control electrode of the thyristor SCR1 through the resistor R19. The positive electrode of the thyristor SCR1 is connected to the emitter of the triode T7. The negative electrode of the thyristor SCR1 is connected to the source electrode of the PMOS transistor Q3. The base of the triode T6 is connected to the output terminal of the DC power supply VCC through the adjustable resistor RT1. The base of the triode T7 is connected to the output terminal of the DC power supply VCC through the resistor RT2. The collector of the triode T7 is connected to the gate of the NMOS transistor Q4 through the resistor R21. The source electrode of the NMOS transistor Q4 is grounded. The drain electrode of the NMOS transistor Q4 is connected to the gate of the PMOS transistor Q3. The source electrode of the PMOS transistor Q3 is connected to the gate of the PMOS transistor Q3 through the resistor R22. The drain electrode of the PMOS transistor Q3 is connected to the positive electrode of the diode D4. The negative electrode of the diode D4 serves as the output terminal VCC1 of the lithium battery power supply control circuit. The drain electrode of the PMOS transistor Q3 is connected to the base of the triode T9 through the resistor R23. The emitter of the triode T9 is grounded. The collector of the triode T9 is connected to the base of the triode T8. The base of the triode T8 is connected to the collector of the triode T8 through the resistor R24. The collector of the triode T8 is connected to the output terminal of the DC power supply VCC. The emitter of the triode T8 is connected to the positive electrode of the diode D6. The negative electrode of the diode D6 is connected to the negative electrode of the diode D4. The emitter of the triode T8 is connected to the collector of the triode T11 through the resistor R20. The emitter of the triode T8 is connected to the base of the triode T11 through the resistor R28. The emitter of the triode T11 is connected to the negative electrode of the thyristor SCR1.

[0023] Further, the DC power supply VCC includes a rectification circuit and a voltage stabilization circuit;

[0024] The input terminal of the rectification circuit is connected to the commercial power. The output terminal of the rectification circuit is connected to the input terminal of the voltage stabilization circuit. The output terminal of the voltage stabilization circuit outputs the power DC voltage VCC.

[0025] Further, a stepped through hole is provided on the side wall of the water pipe section. A fixing plate is fixedly provided in the stepped through hole. A transparent cover is fixedly provided on the lower surface of the fixing plate. An installation cavity is hermetically formed between the transparent cover and the fixing plate. The ultraviolet LED germicidal lamp is disposed in the installation cavity.

[0026] The beneficial effects of the present invention: Through the present invention, on the one hand, the water discharged from the water pipe can be effectively disinfected and sterilized, thereby ensuring the physical health of people. Moreover, in the use process, it only needs to turn on and off the faucet to complete, which is convenient to use and has a simple structure. On the other hand, the energy generated by the water flow can be converted into electric energy and collected, and is applied to disinfect and sterilize the water pipe, thereby saving energy. Brief Description of the Drawings

[0027] The present invention will be further described below in conjunction with the drawings and embodiments:

[0028] Figure 1 It is a schematic diagram of the electrical structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the present invention.

[0030] Figure 3 It is a schematic diagram of the water pipe section structure.

[0031] Figure 4 It is a schematic diagram of the start control circuit principle of the present invention.

[0032] Figure 5 It is a schematic diagram of the constant current circuit principle of the present invention.

[0033] Figure 6 It is a schematic diagram of the comparison control circuit principle of the present invention.

[0034] Figure 7 It is a schematic diagram of the charging circuit principle of the present invention.

[0035] Figure 8 It is a schematic diagram of the lithium battery power supply control circuit principle of the present invention.

[0036] Figure 9 It is a schematic diagram of the water flow.

[0037] Figure 10 It is Figure 2 the left view structure diagram of. Detailed Description of the Preferred Embodiment

[0038] The present invention will be further described in detail below in conjunction with the accompanying drawings of the specification:

[0039] A self-powered ultraviolet sterilization and disinfection system for a water outlet pipe provided by the present invention includes a water pipe section 1, and the water pipe section is connected between a water pipe and a faucet;

[0040] The water pipe section is provided with an ultraviolet sterilization system for sterilizing and disinfecting the discharged water;

[0041] The ultraviolet sterilization and disinfection system includes an ultraviolet LED sterilization lamp, a water flow sensor 7, a DC power supply VCC, a micro water flow generator 9, an impeller 2, an LED drive circuit, a start control circuit, a lithium battery, a charging circuit, and a lithium battery power supply control circuit;

[0042] The impeller is arranged inside the water pipe section, and the axis of the impeller is perpendicular to but does not intersect the axis of the water pipe section. The micro water flow generator is driven by the impeller to generate electricity, as shown in Figure 9As shown, when water flows in a water pipe, the front end of the water flow forms a parabolic shape, as shown by the dotted line. Therefore, the flow velocity of the water flow in the area close to the axis of the water pipe is greater than that in the area where the water pipe is closed. Thus, the axis of the impeller cannot be set on the axis of the water pipe, otherwise the impeller will not rotate normally;

[0043] The input end of the startup control circuit is connected to the output end VCC1 of the lithium battery power supply control circuit. The output end Vout of the startup control circuit is connected to the power input end of the LED drive circuit. The control input end of the startup control circuit is connected to the output end of the water flow sensor. The control output end Vo of the startup control circuit is connected to the control input end of the LED drive circuit. The LED drive circuit outputs different drive currents to the ultraviolet LED germicidal lamp according to the control signal output by the startup control circuit. The water flow sensor is arranged between the water pipe section and the faucet. The input end of the charging circuit is connected to the output end of the micro water flow generator. The output end of the charging circuit is connected to the input end of the lithium battery. The output end of the lithium battery is connected to the first input end of the lithium battery power supply control circuit. The second input end of the lithium battery power supply control circuit is connected to the DC power supply VCC. Through the present invention, on the one hand, the water output from the water pipe can be effectively disinfected and sterilized, thus providing protection for people's physical health, and it can be completed only by turning on and off the faucet during use, which is convenient to use and has a simple structure. On the other hand, the energy generated by the water flow can be converted into electrical energy and collected, and is applied to disinfect and sterilize the water pipe, thus saving energy; among them, the water flow sensor and the micro water flow generator are prior arts, and can be directly purchased in the market, and their structures and principles can be queried through the web page, which will not be elaborated here.

[0044] In this embodiment, the LED drive circuit includes a comparison control circuit and a constant current circuit;

[0045] The control input end of the comparison control circuit is connected to the control output end of the startup control circuit. The control output end of the comparison control circuit is connected to the control input end of the constant current circuit. The power input end of the constant current circuit is connected to the output end Vout of the startup control circuit. The power output end of the constant current circuit supplies power to the ultraviolet LED germicidal lamp.

[0046] Specifically:

[0047] The comparison control circuit includes a resistor R7, a resistor R8, a resistor R9, a comparator U2 and a comparator U3;

[0048] The non-inverting input terminal of the comparator U2 is connected to the control output terminal of the start control circuit. The output terminal of the comparator U2 serves as the first output terminal of the comparison control circuit and is connected to the first control input terminal of the constant current circuit. The inverting input terminal of the comparator U2 is connected to the output terminal VCC1 of the lithium battery charging and power supply control through the resistor R7. The inverting input terminal of the comparator U2 is connected to the ground after being connected in series with the resistor R9 through the resistor R8. The common connection point between the resistor R8 and the resistor R9 is connected to the inverting input terminal of the comparator U3. The non-inverting input terminal of the comparator U3 is connected to the control output terminal of the start control circuit. The output terminal of the comparator U3 serves as the second output terminal of the start control circuit and is connected to the second control input terminal of the constant current circuit.

[0049] The constant current circuit includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a capacitor C1, an operational amplifier U4, an operational amplifier U5, an operational amplifier U6, a triode T2, a triode T3, and a triode T4;

[0050] The non-inverting input terminal of operational amplifier U4 is connected to one end of resistor R10, and the other end of resistor R10 serves as the power input terminal of the constant current circuit. The output terminal of operational amplifier U4 is respectively connected to one end of resistor R13, resistor R14, and resistor R15. The other end of resistor R13 is connected to the collector of triode T2, the other end of resistor R14 is connected to the collector of triode T3, and the other end of resistor R15 is connected to the collector of triode T4. The emitters of triode T2, triode T3, and triode T4 are all connected to the non-inverting input terminal of operational amplifier U6. The common connection point between the non-inverting input terminal of operational amplifier U6 and the emitter of triode T2 serves as the power output terminal of the constant current circuit. The base of triode T2 is the first control input terminal of the constant current circuit, the base of triode T3 is the second control input terminal of the constant current circuit, the base of triode T4 is connected to one end of resistor R16, and the other end of resistor R16 serves as the third control input terminal of the constant current circuit and is connected to the control output terminal of the start control circuit. The inverting input terminal of operational amplifier U6 is connected to the output terminal of operational amplifier U6. The output terminal of operational amplifier U6 is connected to the inverting input terminal of operational amplifier U5 through resistor R11. The non-inverting input terminal of operational amplifier U5 is connected to the output terminal of operational amplifier U4. The inverting input terminal of operational amplifier U5 is connected to the output terminal of operational amplifier U5 through resistor R12 and capacitor C1 in parallel. The output terminal of operational amplifier U5 is connected to the inverting input terminal of operational amplifier U4. Through the above structure, a stable working current can be provided for the ultraviolet LED lamp, and different currents can be output according to the different water flow rates, so as to ensure the sterilization requirements. The constant current mentioned above means achieving constant current under the condition that the output resistance is determined. For example, when only triode T2 is conducting, then under the condition of output resistance R13, its output current remains unchanged. When triode T2 and T3 or triode T2, T3, and T4 are all conducting, its output resistance becomes the resistance obtained by paralleling resistor R15, resistor R14, and resistor R13. Then at this resistance value, the output current increases compared to when only T2 is conducting and remains unchanged.

[0051] In this embodiment, the start control circuit includes resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, triode T1, PMOS transistor Q1, and operational amplifier U1;

[0052] The source of PMOS transistor Q1 is connected to the output terminal VCC1 of the lithium battery power supply control circuit as the input terminal of the startup control circuit. The drain of PMOS transistor Q1 is connected to the power input terminal of the constant current circuit as the power output terminal Vout of the startup control circuit. The source of PMOS transistor Q1 is connected to the gate of PMOS transistor Q1 through resistor R2. The gate of PMOS transistor Q1 is connected to the collector of transistor T1 through resistor R3. The emitter of transistor T1 is grounded. The base of transistor T1 is connected to the output terminal of operational amplifier U1 through resistor R4. The output terminal of operational amplifier U1 is grounded through the series connection of resistor R5 and resistor R6. The inverting terminal of operational amplifier U1 is connected to the common connection point between resistor R5 and resistor R6. The non-inverting terminal of operational amplifier U1 is connected to the output terminal of the water flow sensor. The output terminal of operational amplifier U1 is used as the control output terminal Vo of the startup control circuit. Among them, operational amplifier U1, resistor R5, and resistor R6 form a non-inverting amplifier circuit for amplifying the sampled voltage signal output by the water flow sensor. When the faucet is not opened, there is no water flow output, and operational amplifier U1 also has no output. Transistor T1 is cut off, so that the gate-source voltage of the PMOS transistor is equal and it is cut off. When operational amplifier U1 has an output, it indicates that the faucet is opened and the water is flowing. Transistor T1 is turned on, and PMOS transistor Q1 is turned on, thereby providing direct current for the constant current circuit, and then the ultraviolet LED germicidal lamp works. Therefore, through the above structure, only by opening or closing the faucet can the startup and shutdown of the sterilization and disinfection device be completed, which is convenient to use.

[0053] In this embodiment, the charging circuit includes diode D1, diode D2, capacitor C2, capacitor C3, resistor R17, resistor R18, PMOS transistor Q2, transistor T5, and zener diode ZD1;

[0054] The positive electrode of diode D1 is connected to the output terminal of the micro water flow generator as the input terminal of the charging circuit. The negative electrode of diode D2 is grounded through capacitor C2. The common connection point between diode D2 and capacitor C2 is connected to the source of PMOS transistor Q2. The drain of PMOS transistor Q2 is connected to the positive electrode of diode D2. The negative electrode of diode D2 is connected to the lithium battery as the output terminal of the charging circuit;

[0055] The source electrode of PMOS transistor Q2 is connected to the gate electrode of PMOS transistor Q2 through resistor R17. The gate electrode of PMOS transistor Q2 is connected to the collector electrode of triode T5. The collector electrode of triode T5 is connected to one end of resistor R18. The other end of resistor R18 is grounded through capacitor C3. The common connection point between resistor R18 and capacitor C3 is connected to the base electrode of triode T5. The emitter electrode of triode T5 is grounded. The drain electrode of PMOS transistor Q2 is connected to the negative electrode of zener diode ZD1. The positive electrode of zener diode ZD1 is grounded. The drain electrode of PMOS transistor Q2 is connected to the positive electrode of diode D3. The negative electrode of diode D3 is connected to the base electrode of triode T5. Among them, diode D1 is a rectifier diode. Capacitor C2 is used to collect and regulate the output current of the generator. As the voltage of capacitor C2 rises and stabilizes, capacitor C3 also enters a stable state and can reach the conduction voltage condition of triode T5. The triode conducts, so that NMOS transistor Q2 conducts, and then charges the lithium battery. A comparison switch circuit is also provided in the lithium battery power supply control circuit, that is, composed of triode T10, resistor R25, resistor R26, resistor R27, and diode D5. Among them, the emitter electrode of triode T10 is connected to the negative electrode of diode D2. The collector electrode of triode T10 is connected to the lithium battery. The emitter electrode of triode T10 is connected to the positive electrode of diode D5 through resistor R25. The negative electrode of diode D5 is connected to the base electrode of triode T10. The base electrode of triode T10 is grounded through the series connection of resistor R26 and resistor R27. The common connection point of resistor R26 and resistor R27 is connected to the drain electrode of PMOS transistor Q3. When the voltage of the lithium battery is sufficient, triode T10 is cut off. When the lithium battery does not supply power externally, that is, when the drain electrode voltage of PMOS transistor Q3 is 0, triode T10 conducts and charges the lithium battery. Triode T10 is a P-type triode.

[0056] In this embodiment, the lithium battery power supply control circuit includes triode T6, triode T7, triode T8, triode T9, triode T11, PMOS transistor Q3, NMOS transistor Q4, thyristor SCR1, resistor R19, resistor R20, resistor R21, resistor R22, resistor R23, resistor R24, resistor R28, adjustable resistor RT1, adjustable resistor RT2, diode D4, and diode D6;

[0057] The emitter of the triode T6 is connected to the emitter of the triode T7. The common connection point between the emitter of the triode T7 and the emitter of the triode T6 is connected to the lithium battery. The collector of the triode T6 is connected to the gate of the thyristor SCR1 through the resistor R19. The positive pole of the thyristor SCR1 is connected to the emitter of the triode T7. The negative pole of the thyristor SCR1 is connected to the source of the PMOS transistor Q3. The base of the triode T6 is connected to the output terminal of the DC power supply VCC through the adjustable resistor RT1. The base of the triode T7 is connected to the output terminal of the DC power supply VCC through the resistor RT2. The collector of the triode T7 is connected to the gate of the NMOS transistor Q4 through the resistor R21. The source of the NMOS transistor Q4 is grounded. The drain of the NMOS transistor Q4 is connected to the gate of the PMOS transistor Q3. The source of the PMOS transistor Q3 is connected to the gate of the PMOS transistor Q3 through the resistor R22. The drain of the PMOS transistor Q3 is connected to the positive pole of the diode D4. The negative pole of the diode D4 is used as the output terminal VCC1 of the lithium battery power supply control circuit. The drain of the PMOS transistor Q3 is connected to the base of the triode T9 through the resistor R23. The emitter of the triode T9 is grounded. The collector of the triode T9 is connected to the base of the triode T8. The base of the triode T8 is connected to the collector of the triode T8 through the resistor R24. The collector of the triode T8 is connected to the output terminal of the DC power supply VCC. The emitter of the triode T8 is connected to the positive pole of the diode D6. The negative pole of the diode D6 is connected to the negative pole of the diode D4. The emitter of the triode T8 is connected to the collector of the triode T11 through the resistor R20. The emitter of the triode T8 is connected to the base of the triode T11 through the resistor R28. The emitter of the triode T11 is connected to the negative pole of the thyristor SCR1. Among them, the triodes T6 and T7 are P-type triodes. Although the resistance values of the adjustable resistors RT1 and RT2 are adjustable, the resistance value of the resistor RT1 always remains less than the resistance value of the resistor RT7. A comparison circuit is formed by the triodes T6 and T7, that is: when RT2 divides the voltage of the direct current VCC, its voltage value VT2 is less than the voltage value VT1 after RT1 divides the voltage of the direct current VCC, thereby realizing the control of the lithium battery. That is to say: when the voltage of the lithium battery reaches VBAT2, VBAT2 - VT2 is greater than the conduction voltage of the triode T7. At this time, the triode T7 conducts, the NMOS transistor Q4 conducts, and the PMOS transistor does not conduct at this time. When the lithium battery voltage reaches VBAT1, VBAT1 - VT1 is greater than the conduction voltage of the triode T6, and the triode T6 conducts. At this time, the thyristor SCR1 is triggered through the resistor R20 and remains conducting. At this time, the source voltage of the PMOS transistor Q3 is greater than the gate voltage and conducts, and the lithium battery supplies power externally. As mentioned above: VBAT1 is the lithium battery discharge threshold circuit, and VBAT2 is the stop discharge voltage of the lithium battery. That is to say: when the lithium battery voltage is lower than VBAT2, it needs to be charged until it reaches VBAT1 before starting to discharge, thereby protecting the lithium battery.When the lithium battery discharges, the triode T9 conducts and T8 cuts off, causing the DC power supply VCC to stop supplying power. When the lithium battery voltage stops supplying power, the NMOS transistor Q4 cuts off, causing the PMOS transistor Q3 to cut off, the triode T9 to cut off, and the triode T8 to conduct and discharge. At this time, T11 conducts with the conduction of the triode T8, applying a voltage to the negative electrode of the thyristor SCR1. At this time, the thyristor SCR1 is cut off due to the presence of a reverse voltage, and the lithium battery completely stops discharging. There is also an indicator light LED1 connected to the base of the triode T9, which indicates when the lithium battery is supplying power. If the user finds that the light is always off, it indicates that there is a fault in the lithium battery power supply circuit and needs to be repaired.

[0058] In this embodiment, the DC power supply VCC includes a rectifier circuit and a voltage regulator circuit;

[0059] The input end of the rectifier circuit is connected to the mains power, the output end of the rectifier circuit is connected to the input end of the voltage regulator circuit, and the output end of the voltage regulator circuit outputs the DC power supply VCC. Among them, the rectifier circuit adopts a full-bridge rectifier circuit composed of diodes, and the voltage regulator circuit is composed of an LM7812 voltage regulator circuit and an LM7805 voltage regulator circuit. The LM7812 outputs 12V DC power, and the LM7805 converts the 12V DC power into 5V output, that is, VCC.

[0060] In this embodiment, a stepped through hole 8 is provided on the side wall of the water pipe section 1, a fixing plate 4 is fixedly provided in the stepped through hole 8, a transparent cover 6 is fixedly provided on the lower surface of the fixing plate 4, and an installation cavity is hermetically formed between the transparent cover 6 and the fixing plate. The ultraviolet LED germicidal lamp 5 is arranged in the installation cavity. Among them, an installation box 3 is arranged on the upper surface of the fixing plate. The lithium battery, the charging circuit, the lithium battery power supply control circuit, the start control circuit, and the LED drive circuit are all arranged in the installation box 3; of course, the fixing plate and the stepped through hole also need to be sealed, and the ultraviolet LED germicidal lamp extends into the water pipe. The above water pipe section can be one end of the user's water pipe outlet or a separately manufactured water pipe section and then connected. The lower surface of the fixing plate refers to the side facing the inside of the water pipe, and the other side is the upper surface. The transparent cover is made of a conventional material that does not reflect or absorb ultraviolet light.

[0061] The working principle is further described as follows:

[0062] When the faucet is closed, the water flow has no flow, the water flow sensor has no output, and the whole device does not work. When the faucet is opened and the water flow is flowing, the water flow sensor has an output. At this time, the triode T1 conducts, causing the constant current circuit to be powered on and output DC power. Since the operational amplifier U1 has an output at this time, the triode T4 also enters the conducting state, and the ultraviolet LED germicidal lamp works for sterilization.

[0063] If the faucet remains open and the water flow rate increases at this time, then the power of the ultraviolet LED germicidal lamp needs to be increased. At this time, the comparator U3 outputs a high level, the triode T3 conducts, and the output resistance of the constant current circuit is the parallel connection of resistor R14 and resistor R15, which is less than the original output resistance R15. The output current of the constant current circuit increases, causing the power of the ultraviolet LED germicidal lamp to increase and ensuring the sterilization effect. When the faucet is further increased to the maximum state, then the comparator U2 also outputs a high level. At this time, the triodes T2, T3, and T4 conduct simultaneously, further increasing the power of the ultraviolet LED germicidal lamp to ensure the sterilization effect. Therefore, through the present invention, not only can sterilization be achieved, but also the sterilization power can be adjusted according to the water flow rate, so as to avoid incomplete sterilization or waste of electric energy due to over-sterilization while meeting the sterilization requirements.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A self-powered ultraviolet sterilization and disinfection system for a water outlet pipe, characterized in that: It includes a water pipe section, and the water pipe section is connected between a water pipe and a faucet; The water pipe section is provided with an ultraviolet sterilization system for sterilizing and disinfecting the discharged water; The ultraviolet sterilization and disinfection system includes an ultraviolet LED sterilization lamp, a water flow sensor, a DC power supply VCC, a micro water flow generator, an impeller, an LED driving circuit, a start control circuit, a lithium battery, a charging circuit, and a lithium battery power supply control circuit; The impeller is arranged inside the water pipe section, and the axis of the impeller is perpendicular to but does not intersect the axis of the water pipe section. The micro water flow generator is driven by the impeller to generate electricity; The input end of the start control circuit is connected to the output end VCC1 of the lithium battery power supply control circuit. The output end Vout of the start control circuit is connected to the power input end of the LED driving circuit. The control input end of the start control circuit is connected to the output end of the water flow sensor. The control output end Vo of the start control circuit is connected to the control input end of the LED driving circuit. The LED driving circuit outputs different driving currents to the ultraviolet LED sterilization lamp according to the control signal output by the start control circuit. The water flow sensor is arranged between the water pipe section and the faucet. The input end of the charging circuit is connected to the output end of the micro water flow generator. The output end of the charging circuit is connected to the input end of the lithium battery. The output end of the lithium battery is connected to the first input end of the lithium battery power supply control circuit. The second input end of the lithium battery power supply control circuit is connected to the DC power supply VCC; The LED driving circuit includes a comparison control circuit and a constant current circuit; The control input end of the comparison control circuit is connected to the control output end of the start control circuit. The control output end of the comparison control circuit is connected to the control input end of the constant current circuit. The power input end of the constant current circuit is connected to the output end Vout of the start control circuit. The power output end of the constant current circuit supplies power to the ultraviolet LED sterilization lamp; The comparison control circuit includes a resistor R7, a resistor R8, a resistor R9, a comparator U2, and a comparator U3; The non-inverting end of the comparator U2 is connected to the control output end of the start control circuit. The output end of the comparator U2 serves as the first output end of the comparison control circuit and is connected to the first control input end of the constant current circuit. The inverting end of the comparator U2 is connected to the output end VCC1 of the lithium battery charging and power supply control through the resistor R7. The inverting end of the comparator U2 is connected to the ground through the resistor R8 and the resistor R9 in series. The common connection point between the resistor R8 and the resistor R9 is connected to the inverting end of the comparator U3. The non-inverting end of the comparator U3 is connected to the control output end of the start control circuit. The output end of the comparator U3 serves as the second output end of the start control circuit and is connected to the second control input end of the constant current circuit; The charging circuit includes a diode D1, a diode D2, a capacitor C2, a capacitor C3, a resistor R17, a resistor R18, a PMOS transistor Q2, a triode T5, and a voltage stabilizing diode ZD1; The positive electrode of the diode D1 is connected to the output end of the micro water flow generator as the input end of the charging circuit. The negative electrode of the diode D1 is grounded through the capacitor C2. The common connection point between the diode D1 and the capacitor C2 is connected to the source electrode of the PMOS transistor Q2. The drain electrode of the PMOS transistor Q2 is connected to the positive electrode of the diode D2. The negative electrode of the diode D2 is connected to the lithium battery as the output end of the charging circuit; The source electrode of the PMOS transistor Q2 is connected to the gate electrode of the PMOS transistor Q2 through the resistor R17. The gate electrode of the PMOS transistor Q2 is connected to the collector electrode of the triode T5. The collector electrode of the triode T5 is connected to one end of the resistor R18. The other end of the resistor R18 is grounded through the capacitor C3. The common connection point between the resistor R18 and the capacitor C3 is connected to the base electrode of the triode T5. The emitter electrode of the triode T5 is grounded. The drain electrode of the PMOS transistor Q2 is connected to the negative electrode of the voltage stabilizing diode ZD1. The positive electrode of the voltage stabilizing diode ZD1 is grounded. The drain electrode of the PMOS transistor Q2 is connected to the positive electrode of the diode D3. The negative electrode of the diode D3 is connected to the base electrode of the triode T5; The constant current circuit includes a resistor R10, a resistor R11, a resistor R12, a resistor R13, a resistor R14, a resistor R15, a resistor R16, a capacitor C1, an operational amplifier U4, an operational amplifier U5, an operational amplifier U6, a triode T2, a triode T3, and a triode T4; The non-inverting input end of the operational amplifier U4 is connected to one end of the resistor R10. The other end of the resistor R10 serves as the power input end of the constant current circuit. The output end of the operational amplifier U4 is respectively connected to one ends of the resistor R13, the resistor R14, and the resistor R15. The other end of the resistor R13 is connected to the collector electrode of the triode T2. The other end of the resistor R14 is connected to the collector electrode of the triode T3. The other end of the resistor R15 is connected to the collector electrode of the triode T4. The emitter electrodes of the triode T2, the triode T3, and the triode T4 are all connected to the non-inverting input end of the operational amplifier U6. The common connection point between the non-inverting input end of the operational amplifier U6 and the emitter electrode of the triode T2 serves as the power output end of the constant current circuit. The base electrode of the triode T2 is the first control input end of the constant current circuit. The base electrode of the triode T3 is the second control input end of the constant current circuit. The base electrode of the triode T4 is connected to one end of the resistor R16. The other end of the resistor R16 serves as the third control input end of the constant current circuit and is connected to the control output end of the start control circuit. The inverting input end of the operational amplifier U6 is connected to the output end of the operational amplifier U6. The output end of the operational amplifier U6 is connected to the inverting input end of the operational amplifier U5 through the resistor R11. The non-inverting input end of the operational amplifier U5 is connected to the output end of the operational amplifier U4. The inverting input end of the operational amplifier U5 is connected to the output end of the operational amplifier U5 through the resistor R12 and the capacitor C1 in parallel. The output end of the operational amplifier U5 is connected to the inverting input end of the operational amplifier U4; The start control circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a triode T1, a PMOS transistor Q1, and an operational amplifier U1; The source of PMOS transistor Q1 is connected to the output terminal VCC1 of the lithium battery power supply control circuit as the input terminal of the startup control circuit. The drain of PMOS transistor Q1 is connected to the power input terminal of the constant current circuit as the power output terminal Vout of the startup control circuit. The source of PMOS transistor Q1 is connected to the gate of PMOS transistor Q1 through resistor R2. The gate of PMOS transistor Q1 is connected to the collector of transistor T1 through resistor R3. The emitter of transistor T1 is grounded. The base of transistor T1 is connected to the output terminal of operational amplifier U1 through resistor R4. The output terminal of operational amplifier U1 is grounded through the series connection of resistor R5 and resistor R6. The inverting terminal of operational amplifier U1 is connected to the common connection point between resistor R5 and resistor R6. The non-inverting terminal of operational amplifier U1 is connected to the output terminal of the water flow sensor. The output terminal of operational amplifier U1 is used as the control output terminal Vo of the startup control circuit.

2. The self-powered ultraviolet sterilization and disinfection system for the water outlet pipe according to claim 1, wherein: The lithium battery power supply control circuit includes transistor T6, transistor T7, transistor T8, transistor T9, transistor T11, PMOS transistor Q3, NMOS transistor Q4, thyristor SCR1, resistor R19, resistor R20, resistor R21, resistor R22, resistor R23, resistor R24, resistor R28, adjustable resistor RT1, adjustable resistor RT2, diode D4, and diode D6; The emitter of the triode T6 is connected to the emitter of the triode T7. The common connection point between the emitter of the triode T7 and the emitter of the triode T6 is connected to the lithium battery. The collector of the triode T6 is connected to the control electrode of the thyristor SCR1 through the resistor R19. The positive electrode of the thyristor SCR1 is connected to the emitter of the triode T7. The negative electrode of the thyristor SCR1 is connected to the source electrode of the PMOS transistor Q3. The base of the triode T6 is connected to the output terminal of the DC power supply VCC through the adjustable resistor RT1. The base of the triode T7 is connected to the output terminal of the DC power supply VCC through the resistor RT2. The collector of the triode T7 is connected to the gate of the NMOS transistor Q4 through the resistor R21. The source electrode of the NMOS transistor Q4 is grounded. The drain electrode of the NMOS transistor Q4 is connected to the gate of the PMOS transistor Q3. The source electrode of the PMOS transistor Q3 is connected to the gate of the PMOS transistor Q3 through the resistor R22. The drain electrode of the PMOS transistor Q3 is connected to the positive electrode of the diode D4. The negative electrode of the diode D4 serves as the output terminal VCC1 of the lithium battery power supply control circuit. The drain electrode of the PMOS transistor Q3 is connected to the base of the triode T9 through the resistor R23. The emitter of the triode T9 is grounded. The collector of the triode T9 is connected to the base of the triode T8. The base of the triode T8 is connected to the collector of the triode T8 through the resistor R24. The collector of the triode T8 is connected to the output terminal of the DC power supply VCC. The emitter of the triode T8 is connected to the positive electrode of the diode D6. The negative electrode of the diode D6 is connected to the negative electrode of the diode D4. The emitter of the triode T8 is connected to the collector of the triode T11 through the resistor R20. The emitter of the triode T8 is connected to the base of the triode T11 through the resistor R28. The emitter of the triode T11 is connected to the negative electrode of the thyristor SCR1.

3. The self-powered ultraviolet sterilization and disinfection system for the water outlet pipe according to claim 1, wherein: The DC power supply VCC includes a rectification circuit and a voltage stabilization circuit; The input terminal of the rectification circuit is connected to the mains power supply. The output terminal of the rectification circuit is connected to the input terminal of the voltage stabilization circuit. The output terminal of the voltage stabilization circuit outputs the power DC voltage VCC.

4. The self-powered ultraviolet sterilization and disinfection system for the water outlet pipe according to claim 1, characterized in that: A stepped through hole is provided on the side wall of the water pipe section. A fixing plate is fixedly provided in the stepped through hole. A transparent cover is fixedly provided on the lower surface of the fixing plate. An installation cavity is hermetically formed between the transparent cover and the fixing plate. The ultraviolet LED germicidal lamp is arranged in the installation cavity.

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