Water path control circuit of external water kettle purifier

Abstract

The utility model discloses a water route control circuit of external kettle purifier, including power module, singlechip, booster pump circuit, flush solenoid valve circuit, UV germicidal lamp circuit, diaphragm pump circuit, one in two solenoid valve circuit, just heating assembly circuit and electronic cold gallbladder circuit, power module provides power supply for singlechip, and singlechip output signal controls each circuit conduction, and booster pump circuit controls starting booster pump, and flush solenoden valve circuit controls opening flush solenoid valve, and UV germicidal lamp circuit controls opening UV germicidal lamp, and diaphragm pump circuit controls starting diaphragm pump, and one in two solenoid valve circuit controls opening one in two solenoid valve, and just heating assembly circuit and electronic cold gallbladder circuit control starting just heating assembly and electronic cold gallbladder respectively. Water route control circuit controls the starting of each part on the water route in purifier, makes purifier normal operation.

Description

Technical Field

[0001] This utility model relates to the field of water purifier and electronic circuit technology, and in particular to a water circuit control circuit for an external water kettle water purifier. Background Technology

[0002] People have increasingly higher requirements for the quality of household drinking water, and water purifiers have gradually become a choice for family drinking water. Water purifiers are devices that use municipal tap water or other water supply as the source water and improve the quality of drinking water through filtration.

[0003] In modern society, the control circuits of household appliances are becoming increasingly integrated. Various functional components of water purifiers require corresponding circuits to start and operate, so it is necessary to design appropriate circuits. Utility Model Content

[0004] The purpose of this invention is to provide a water circuit control circuit for an external water purifier, which controls the activation of various components in the water circuit of the purifier to enable the purifier to operate.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a water circuit control circuit for an external water purifier, comprising, The power module converts the input 24V DC power into 5V DC power output to provide power to the microcontroller. A microcontroller, whose output signals control the conduction of each circuit; A booster pump circuit, wherein the booster pump circuit receives a signal from the microcontroller to activate and start the booster pump; A flushing solenoid valve circuit, wherein the flushing solenoid valve circuit receives a signal from the microcontroller and opens the flushing solenoid valve. The UV germicidal lamp circuit receives a signal from the microcontroller to turn on the UV germicidal lamp. A diaphragm pump circuit, wherein the diaphragm pump circuit receives a signal from the microcontroller to activate and start the diaphragm pump; A one-in-two-position solenoid valve circuit, wherein the one-in-two-position solenoid valve circuit receives a signal from the microcontroller to open the one-in-two-position solenoid valve; Specifically, the heating component circuit and the electronic cooling unit circuit; the heating component circuit and the electronic cooling unit circuit respectively receive signals from the microcontroller to activate the heating component and the electronic cooling unit.

[0006] A further feature of this invention is that the power module includes a step-down chip U1, model XL1509-ADJ, with an electrolytic capacitor EC2 and a capacitor C4 connected in parallel between the VIN pin of the step-down chip U1 and the ground point; the OUT pin of the step-down chip U1 is connected to an inductor L1, and a Zener diode Z1 and a high-frequency electrolytic capacitor EC2 and a capacitor C2 are connected in parallel between the OUT pin and the ground point; the FB pin of the step-down chip U1 is connected to an inductor L1; and the ON / OFF pin of the step-down chip U1 is connected to a resistor R8 and then grounded.

[0007] A further feature of this invention is that the FB pin of the step-down chip U1 is connected to a resistor R2, the resistor R2 is connected in parallel with a capacitor C1, and the resistor R2 is connected in series with a resistor R1.

[0008] A further configuration of this utility model is as follows: the flushing solenoid valve circuit includes a MOSFET Q1, a resistor R3, a resistor R5, and a diode D1. The diode D1 is connected in parallel with the connector CN1. The gate of the MOSFET Q1 is connected to the microcontroller after the resistor R3. The drain of the MOSFET Q1 is connected to the connector CN1. The source of the MOSFET Q1 is connected to the ground point. The resistor R5 is connected to the gate and source of the MOSFET Q1.

[0009] The present invention is further configured as follows: the booster pump circuit includes a MOSFET Q2, a resistor R4, a resistor R6, and a diode D2. The diode D2 is connected to the terminal CN2. The gate of the MOSFET Q2 is connected to the microcontroller after the resistor R4. The drain of the MOSFET Q2 is connected to the terminal CN2. The source of the MOSFET Q2 is connected to the ground point. The resistor R6 is connected to the gate and source of the MOSFET Q2.

[0010] A further feature of this invention is that the diaphragm pump circuit includes a MOSFET Q3, a resistor R7, a resistor R8, and a diode D3. The gate of the MOSFET Q3 is connected to the microcontroller after being connected to the resistor R7. The MOSFET Q3 is turned on by receiving a signal from the microcontroller.

[0011] A further feature of this invention is that the UV germicidal lamp circuit includes a MOSFET Q4, a resistor R10, a resistor R14, and a diode D7. The gate of the MOSFET Q4 is connected to the microcontroller after being connected to the resistor R10. The MOSFET Q4 is turned on by receiving a signal from the microcontroller.

[0012] A further feature of this invention is that the one-input two-output solenoid valve circuit includes a MOSFET Q5, a resistor R11, a resistor R15, and a diode D8. The gate of the MOSFET Q5 is connected to the microcontroller after the resistor R11. The MOSFET Q5 is turned on by receiving a signal from the microcontroller.

[0013] A further configuration of this invention is as follows: the heating component circuit includes a relay REG1, a transistor Q6, a resistor R24, a diode D11, and a relay REG2, a transistor Q11, a resistor R19, and a diode D12; the collector of transistor Q6 is connected to the coil contact of relay REG1, and the base of transistor Q6 is connected in sequence to resistor R24 ​​and a microcontroller; the collector of transistor Q11 is connected to the coil contact of relay REG2, and the base of transistor Q11 is connected in sequence to resistor R19 and a microcontroller.

[0014] A further feature of this invention is that the electronic cooling tube circuit includes a relay RY1, a transistor Q8, a resistor R39, and a diode D13. The collector of the transistor Q8 is connected to the coil contact of the relay RY1, and the base of the transistor Q8 is connected to the resistor R39 and the microcontroller in sequence. The transistor Q8 receives a signal from the microcontroller and turns on to make the relay RY1 energized.

[0015] The water circuit control circuit of this utility model external water purifier controls the activation of various components in the water circuit of the water purifier, so that the water purifier can operate normally. Attached Figure Description

[0016] Figure 1 This is a block diagram of the water circuit control circuit of the external water purifier in the embodiment.

[0017] Figure 2 This is a schematic diagram of the water circuit of the external water purifier in the embodiment.

[0018] Figure 3 This is a circuit diagram of the power module in the embodiment.

[0019] Figure 4 This is the circuit schematic of the microcontroller in the embodiment.

[0020] Figure 5 These are the circuit schematics for each circuit in the embodiment.

[0021] Figure 6 This is a circuit diagram of the heating component circuit in the embodiment.

[0022] Figure 7 This is a circuit diagram of the electronic cooling tube circuit in the embodiment.

[0023] In the diagram: 100, power supply module; 101, microcontroller; 102, booster pump circuit; 103, flushing solenoid valve circuit; 104, UV germicidal lamp circuit; 105, diaphragm pump circuit; 106, one-in-two-out solenoid valve circuit; 107, heating component circuit; 108, electronic cooling tank circuit. Detailed Implementation

[0024] 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 a part of the embodiments of the present utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. It should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0025] Reference Appendix Figure 1-7 The present invention discloses a water circuit control circuit for an external water purifier. The water circuit control circuit is installed in the control board of the external water purifier and controls the start-up and operation of various components in the water circuit of the water purifier.

[0026] like Figure 2 The raw water tank is divided into two chambers, one for storing incoming municipal tap water and the other for recycling wastewater. The raw water in the tank is pumped to a composite filter cartridge by a booster pump. After filtration, the composite filter cartridge outputs the purified water to a water pitcher, which is externally designed for dispensing purified water as needed. The composite filter cartridge is preferably a polypropylene activated carbon reverse osmosis membrane composite filter cartridge. The wastewater generated by the composite filter cartridge flows back to the raw water tank through a flushing solenoid valve. The raw water in the tank can also be flushed back through the flushing solenoid valve to clean the composite filter cartridge membrane. The purified water from the water pitcher is sterilized by a UV sterilizer and then pumped by a diaphragm pump to a single-outlet solenoid valve, splitting the water into two paths. The diaphragm pump is preferably a 24V miniature diaphragm pump. One path of the purified water is heated by an instant heating element and then output as hot water at the outlet. The other path is sent to an electronic cooling tank, which cools the purified water. The cold water in the electronic cooling tank is then output as cold water at the outlet.

[0027] like Figure 1As shown, a water circuit control circuit for an external water purifier includes a power module 100, a microcontroller 101, a booster pump circuit 102, a flushing solenoid valve circuit 103, a UV sterilizing lamp circuit 104, a diaphragm pump circuit 105, a single-inlet / two-outlet solenoid valve circuit 106, a heating element circuit 107, and an electronic cooling tank circuit 108. The power module 100 steps down the input 24V power supply to a 5V DC output, providing power for the microcontroller 101. The microcontroller 101 connects to various functional circuits, outputting signals to control the conduction of each circuit. The booster pump circuit 102 connects to and controls the booster pump; it receives signals from the microcontroller 101 to activate the booster pump. The flushing solenoid valve circuit 103 connects to the flushing solenoid valve and receives signals from the microcontroller 101 to open the flushing solenoid valve. The UV sterilizing lamp circuit 104 connects to the UV sterilizing lamp. The UV sterilization lamp is turned on by receiving a signal from the microcontroller 101; the diaphragm pump circuit 105 is connected to the diaphragm pump and starts the diaphragm pump when it receives a signal from the microcontroller 101; the one-in-two-position solenoid valve circuit 106 is connected to the one-in-two-position solenoid valve and opens the one-in-two-position solenoid valve when it receives a signal from the microcontroller 101; the instant heating component circuit 107 is connected to the instant heating component and turns on the instant heating component when it receives a signal from the microcontroller 101; the electronic cooling tank circuit 108 is connected to the electronic cooling tank and turns on the electronic cooling tank when it receives a signal from the microcontroller 101.

[0028] like Figure 3 The power module 100 includes a step-down chip U1, preferably model XL1509-ADJ. Pin 1 of the step-down chip U1 is the VIN pin, which receives a 24V DC input. Electrolytic capacitor EC2 and capacitor C4 are connected in parallel between the VIN pin and ground. Pin 2 of the step-down chip U1 is the OUT pin, connected to inductor L1. A Zener diode Z1 and high-frequency electrolytic capacitor EC1 and capacitor C2 are connected in parallel between the OUT pin and ground. The OUT pin outputs a 5V DC voltage. Pin 3 of the step-down chip U1 is the FB pin, connected to inductor L1 to input the output current to the FB pin for feedback. Resistors R1 and R2 and capacitor C1 are also connected thereto. Changing resistors R1 and R2 adjusts the output voltage, with the formula: VOUT = 1.23 * (1 + R2 / R1). In this embodiment, R1 = 3.3K ohms and R2 = 10 ohms. K ohms; Pin 4 of the buck chip U1 is the ON / OFF pin, connected to ground via resistor R8. A capacitor C3 is connected between the VIN pin and the ON / OFF pin. A Zener diode D6 is connected in parallel between the ON / OFF pin and ground. Pins 5-8 of the buck chip U1 are the GND pins, connected to ground.

[0029] like Figure 4The microcontroller 101 is chip IC2. Chip IC2 is a 28-pin microprocessor. Pins 8 and 7 of chip IC2 are the positive and negative power supply pins of the chip, and pins 1-6 and pins 9-28 are I / O pins. Chip IC2 runs and inputs or outputs signals.

[0030] like Figure 5 The flushing solenoid valve circuit 103 includes a MOSFET Q1, resistors R3 and R5, and a diode D1. Diode D1 is connected in parallel with the connector CN1. The drain of MOSFET Q1 is connected to pin 2 of connector CN1. The gate of MOSFET Q1 is connected to resistor R3, which is connected to the microcontroller 101IC2. The source of MOSFET Q1 is connected to ground. Resistor R5 connects the gate and source of MOSFET Q1. Pin 1 of connector CN1 receives 24V DC power and is connected to the power connector of the flushing solenoid valve. When the gate of MOSFET Q1 receives the signal output from microcontroller 101, it conducts, and the flushing solenoid valve is energized and opened.

[0031] like Figure 5 Similarly, the booster pump circuit 102 includes a MOSFET Q2, resistors R4 and R6, and a diode D2. Diode D2 is connected in parallel with the connector CN2. The gate of MOSFET Q2 is connected to the microcontroller 101 after resistor R4. The drain of MOSFET Q2 is connected to the connector CN2. The source of MOSFET Q2 is connected to the ground point. Resistor R6 connects the gate and source of MOSFET Q2. The connector CN2 is connected to the positive and negative terminals of the booster pump. The gate of MOSFET Q2 receives the signal from the microcontroller 101 and turns on to start the booster pump.

[0032] like Figure 5 Similarly, the diaphragm pump circuit 105 includes a MOSFET Q3, resistors R7 and R8, and a diode D3. The gate of the MOSFET Q3 is connected to the microcontroller 101 after being connected to resistor R7. The connector CN4 is connected to the positive and negative terminals of the diaphragm pump. The gate of the MOSFET Q3 receives the signal from the microcontroller 101 and turns on to start the diaphragm pump, thus delivering pure water.

[0033] like Figure 5 Similarly, the UV sterilization lamp circuit 104 includes a MOSFET Q4, resistors R10 and R14, and diode D7. The gate of the MOSFET Q4 is connected to the microcontroller 101 after being connected to resistor R10. The connector CN5 is connected to the positive and negative terminals of the UV sterilization lamp. The gate of the MOSFET Q4 receives the signal from the microcontroller 101 and turns on the UV sterilization lamp.

[0034] like Figure 5Similarly, the one-in-two-position solenoid valve circuit 106 includes a MOSFET Q5, resistors R11 and R15, and diode D8. The gate of the MOSFET Q5 is connected to the microcontroller 101 after being connected to resistor R11. The plug-in terminal CN6 is connected to the positive and negative terminals of the one-in-two-position solenoid valve. The gate of the MOSFET Q5 receives the signal from the microcontroller 101 and turns on to open the one-in-two-position solenoid valve.

[0035] like Figure 6 The heating component circuit 107 includes relay REG1, transistor Q6, resistor R24, diode D11, and relay REG2, transistor Q11, resistor R19, and diode D12. The normally open contact of relay REG1 is connected to the AC live wire L, the normally closed contact is left unconnected, and the common point is connected to the output terminal of the heating component circuit 107, which is connected to the output of the heating component. Diode D11 is connected in parallel across the two ends of the coil contact of relay REG1. One end of the coil contact of relay REG1 receives a 24V DC power supply, and the other end is connected to the collector of transistor Q6. The emitter of transistor Q6 is grounded, and the base of transistor Q6 is connected to resistor R24 ​​and microcontroller 101 in sequence.

[0036] In this embodiment, the heating component has two live wire terminals, allowing for heating with two heating elements. Similarly, the normally open contact of relay REG2 is connected to the AC live wire L, the normally closed contact is left unconnected, and the common point is connected to diodes D9 and D10 before being connected to the output terminal of the heating component circuit 107. Diode D12 is connected in parallel across the coil contacts of relay REG2. One end of the coil contacts of relay REG2 receives a 24V DC power supply, and the other end is connected to the collector of transistor Q11. The emitter of transistor Q11 is grounded, and the base of transistor Q11 is connected to resistor R19 and microcontroller 101 in sequence. The gate of transistor Q6 receives a signal from microcontroller 101 and conducts to energize relay REG1, outputting AC mains power. The gate of transistor Q11 receives a signal from microcontroller 101 and conducts to energize relay REG2, also outputting AC mains power. At the same time, diodes D9 and D10 allow current to flow in one direction.

[0037] like Figure 7The electronic cooling tank circuit 108 includes a relay RY1, a transistor Q8, a resistor R39, and a diode D13. The normally open contact of the relay RY1 is connected to the AC live wire L, the normally closed contact is left unconnected, and the common point is connected to the output terminal of the electronic cooling tank circuit 108. The output terminal of the electronic cooling tank circuit 108 is connected to the positive terminal of the electronic cooling tank. The diode D13 is connected in parallel across the coil contacts of the relay RY1. One end of the relay RY1 coil contacts receives a 24V DC power supply, and the other end is connected to the collector of the transistor Q8. The emitter of the transistor Q8 is grounded, and the base of the transistor Q8 is connected in sequence to the resistor R39 and the microcontroller 101. When the transistor Q8 receives the signal from the microcontroller 101, it conducts and causes the relay RY1 to close, thus powering up the electronic cooling tank and enabling it to cool pure water.

[0038] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A water circuit control circuit for an external water purifier, characterized in that: include, The power module (100) converts the input 24V DC power into 5V DC power output to provide power to the microcontroller (101); A microcontroller (101) outputs signals to control the conduction of each circuit; A booster pump circuit (102) receives a signal from the microcontroller (101) to start the booster pump; A flushing solenoid valve circuit (103) receives a signal from the microcontroller (101) to open the flushing solenoid valve. UV germicidal lamp circuit (104), wherein the UV germicidal lamp circuit (104) receives the signal from the microcontroller (101) to turn on the UV germicidal lamp; The diaphragm pump circuit (105) receives a signal from the microcontroller (101) to start the diaphragm pump. A one-in-two-position solenoid valve circuit (106) receives a signal from the microcontroller (101) to open the one-in-two-position solenoid valve. The heating component circuit (107) and the electronic cooling circuit (108) are respectively connected by the signal from the microcontroller (101) to start the heating component and the electronic cooling circuit.

2. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The power module (100) includes a step-down chip U1, model XL1509-ADJ. An electrolytic capacitor EC2 and a capacitor C4 are connected in parallel between the VIN pin of the step-down chip U1 and the ground point. The OUT pin of the step-down chip U1 is connected to an inductor L1, and a Zener diode Z1 and a high-frequency electrolytic capacitor EC2 and a capacitor C2 are connected in parallel between the OUT pin and the ground point. The FB pin of the step-down chip U1 is connected to an inductor L1. The ON / OFF pin of the step-down chip U1 is connected to a resistor R8 and then grounded.

3. The water circuit control circuit of an external water purifier according to claim 2, characterized in that: The FB pin of the step-down chip U1 is connected to resistor R2, resistor R2 is connected in parallel with capacitor C1, and resistor R2 is connected in series with resistor R1.

4. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The flushing solenoid valve circuit (103) includes a MOS transistor Q1, a resistor R3, a resistor R5, and a diode D1. The diode D1 is connected in parallel with the connector CN1. The gate of the MOS transistor Q1 is connected to the microcontroller (101) after the resistor R3. The drain of the MOS transistor Q1 is connected to the connector CN1. The source of the MOS transistor Q1 is connected to the ground point. The resistor R5 is connected to the gate and source of the MOS transistor Q1.

5. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The booster pump circuit (102) includes a MOSFET Q2, a resistor R4, a resistor R6, and a diode D2. The diode D2 is connected to the terminal CN2. The gate of the MOSFET Q2 is connected to the microcontroller (101) after the resistor R4. The drain of the MOSFET Q2 is connected to the terminal CN2. The source of the MOSFET Q2 is connected to the ground point. The resistor R6 is connected to the gate and source of the MOSFET Q2.

6. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The diaphragm pump circuit (105) includes a MOSFET Q3, a resistor R7, a resistor R8 and a diode D3. The gate of the MOSFET Q3 is connected to the microcontroller (101) after the resistor R7. The MOSFET Q3 is turned on by receiving a signal from the microcontroller (101).

7. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The UV germicidal lamp circuit (104) includes a MOSFET Q4, a resistor R10, a resistor R14 and a diode D7. The gate of the MOSFET Q4 is connected to the microcontroller (101) after the resistor R10. The MOSFET Q4 is turned on by receiving the signal from the microcontroller (101).

8. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The solenoid valve circuit (106) includes a MOSFET Q5, a resistor R11, a resistor R15, and a diode D8. The gate of the MOSFET Q5 is connected to the microcontroller (101) after the resistor R11. The MOSFET Q5 is turned on by receiving the signal from the microcontroller (101).

9. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The heating component circuit (107) includes a relay REG1, a transistor Q6, a resistor R24, a diode D11, a relay REG2, a transistor Q11, a resistor R19, and a diode D12; the collector of transistor Q6 is connected to the coil contact of relay REG1, and the base of transistor Q6 is connected to resistor R24 ​​and microcontroller (101) in sequence; the collector of transistor Q11 is connected to the coil contact of relay REG2, and the base of transistor Q11 is connected to resistor R19 and microcontroller (101) in sequence.

10. The water circuit control circuit of an external water purifier according to claim 1, characterized in that: The electronic cooling circuit (108) includes a relay RY1, a transistor Q8, a resistor R39 and a diode D13. The collector of the transistor Q8 is connected to the coil contact of the relay RY1, and the base of the transistor Q8 is connected to the resistor R39 and the microcontroller (101) in sequence. The transistor Q8 receives the signal from the microcontroller (101) and turns on to make the relay RY1 energized.

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