Front-mounted device of water purification equipment and water purification equipment

Abstract

The utility model provides a front device of water purification equipment and the water purification equipment. The device comprises a mains supply module, a battery module, a first power supply circuit, a second power supply circuit, a first voltage detection circuit, a second voltage detection circuit, a water inlet electric valve and a control unit, the mains supply module is electrically connected with a power supply end through the first power supply circuit, and the battery module is electrically connected with the power supply end through the second power supply circuit. The control unit obtains a working power supply through a power supply end and is electrically connected with the water inlet electric valve; the first voltage detection circuit is used for detecting an output voltage value of the first power supply circuit, and the second voltage detection circuit is used for detecting an output voltage value of the second power supply circuit; the control unit controls on-off of the second power supply circuit and on-off of the water inlet electric valve based on the output voltage value of the first power supply circuit. According to the scheme, the battery module supplies power when the mains supply is interrupted, so that the water inlet electric valve is controlled to be closed, and the water use safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a pre-installed device of a water purification device and a water purification device. Background Art

[0002] Water purification equipment purifies water by deeply filtering it. It uses a filter element to filter the water supply, removing floating debris, heavy metals, bacteria, viruses, residual chlorine, silt, rust, and microorganisms, ensuring water purity and hygiene. If the front-end device of the water purification equipment suddenly loses power during use, it may cause a water leakage safety hazard. Utility Model Content

[0003] The present application provides a pre-device of a water purification device and a water purification device, which can reduce the risk of water leakage caused by sudden power failure of the pre-device of the water purification device and ensure the safety of users' water use.

[0004] In the first aspect, an embodiment of the present application provides a front-end device of a water purification equipment, including: an AC power module, a battery module, a first power supply circuit, a second power supply circuit, a first voltage detection circuit, a second voltage detection circuit, a water inlet electric valve and a control unit, the AC power module is electrically connected to the power supply end through the first power supply circuit, the battery module is electrically connected to the power supply end through the second power supply circuit, the control unit obtains working power through the power supply end, and the control unit is electrically connected to the water inlet electric valve; the first voltage detection circuit is connected in series in the first power supply circuit, for detecting the output voltage value of the first power supply circuit and sending it to the control unit, the second voltage detection circuit is connected in series in the second power supply circuit, for detecting the output voltage value of the second power supply circuit and sending it to the control unit; the control unit controls the switch of the second power supply circuit and controls the opening and closing of the water inlet electric valve based on the output voltage value of the first power supply circuit.

[0005] In one embodiment, the device further includes: a water leakage detection unit, which is electrically connected to the power supply end and the control unit respectively.

[0006] In one embodiment, it further includes: a motor control circuit, which is electrically connected to the power supply end, the water inlet electric valve and the control unit respectively; the motor control circuit includes a motor drive circuit and a motor valve head detection circuit.

[0007] In one embodiment, the device further includes a flow detection unit, which is electrically connected to the power supply end and the control unit respectively.

[0008] In one embodiment, in the first power supply circuit, the positive electrode of the first diode is electrically connected to the positive electrode of the mains module, the negative electrode of the first diode is electrically connected to the power supply end through the voltage conversion unit, and the negative electrode of the mains module is grounded;

[0009] In the first voltage detection circuit, one end of the first resistor is connected to the anode of the first diode, and the other end is grounded through a second resistor, and an end of the second resistor away from the ground is electrically connected to the control unit;

[0010] In the second power supply circuit, a source of a first P-channel MOS transistor is electrically connected to the positive electrode of the battery module, a drain of the first P-channel MOS transistor is electrically connected to the positive electrode of the second diode, a cathode of the second diode is electrically connected to the power supply end through the voltage conversion unit, a source and a gate of the first P-channel MOS transistor are further electrically connected via a third resistor, a gate of the first P-channel MOS transistor is electrically connected to the collector of a first NPN transistor via a fourth resistor, a base of the first NPN transistor is electrically connected to a first enable end via a fifth resistor, the first enable end is electrically connected to the control unit to obtain an enable signal, a base and an emitter of the first NPN transistor are further electrically connected via a sixth resistor, an emitter of the first NPN transistor is grounded, and a negative electrode of the battery module is grounded;

[0011] In the second voltage detection circuit, one end of the seventh resistor is electrically connected to the anode of the second diode, and the other end is grounded through the eighth resistor, and the end of the eighth resistor away from the ground is electrically connected to the control unit.

[0012] In one embodiment, in the water leakage detection unit, the second enable end is electrically connected to the base of the first PNP transistor through a ninth resistor, the second enable end is electrically connected to the control unit to obtain an enable signal, the emitter of the first PNP transistor is electrically connected to the power supply end, and the power supply end is also electrically connected to the base of the first PNP transistor through a tenth resistor, the collector of the first PNP transistor is electrically connected to the water leakage detection sensor through an eleventh resistor, the water leakage detection sensor is also electrically connected to the base of the second NPN transistor through a twelfth resistor, the base of the second NPN transistor is also grounded through a first capacitor, a thirteenth resistor is connected in parallel with the first capacitor, the emitter of the second NPN transistor is grounded, the collector of the second NPN transistor is electrically connected to the power supply end through a fourteenth resistor, the collector of the second NPN transistor is also grounded through a fifteenth resistor and a second capacitor, and the end of the second capacitor away from ground is electrically connected to the control unit.

[0013] In one embodiment, in the motor drive circuit, the first input terminal is electrically connected to the base of a third NPN transistor through a sixteenth resistor, the base and emitter of the third NPN transistor are further electrically connected through a seventeenth resistor, the emitter of the third NPN transistor is grounded, the collector of the third NPN transistor is electrically connected to the gate of a first N-channel MOS transistor, the source of the first N-channel MOS transistor is grounded, the drain of the first N-channel MOS transistor and the drain of the second P-channel MOS transistor are both electrically connected to the first motor control terminal, the source of the second P-channel MOS transistor is electrically connected to the power supply terminal, and the source of the second P-channel MOS transistor is further electrically connected to the gate of the second P-channel MOS transistor through an eighteenth resistor; the first motor control terminal is electrically connected to a port of the water inlet electric valve; and the first motor control terminal is electrically connected to a first port in the water inlet electric valve;

[0014] The second input terminal is electrically connected to the base of the fourth NPN transistor through a nineteenth resistor. The base and emitter of the fourth NPN transistor are further electrically connected through a twentieth resistor. The emitter of the fourth NPN transistor is grounded. The collector of the fourth NPN transistor is electrically connected to the gate of the second N-channel MOS transistor. The source of the second N-channel MOS transistor is grounded. The drain of the second N-channel MOS transistor and the drain of the third P-channel MOS transistor are both electrically connected to the second motor control terminal. The source of the third P-channel MOS transistor is electrically connected to the power supply terminal. The source of the third P-channel MOS transistor is further electrically connected to the gate of the third P-channel MOS transistor through a twenty-first resistor. The second motor control terminal is electrically connected to the drain of the third P-channel MOS transistor. The second motor control terminal is electrically connected to the second port in the water inlet electric valve. In one embodiment, in the motor valve head detection circuit, one end of a twenty-second resistor is electrically connected to the power supply end, the other end of the twenty-second resistor is electrically connected to the third port of the water inlet electric valve, and the other end of the twenty-second resistor is further connected to the control unit via a twenty-third resistor;

[0015] One end of a 24th resistor is electrically connected to the power supply terminal, the other end of the 24th resistor is electrically connected to the fourth port of the water inlet electric valve, and the other end of the 24th resistor is also electrically connected to the control unit via a 25th resistor. In one embodiment, the invention further includes: a communication module, the communication module being electrically connected to the control unit;

[0016] The communication module includes at least one of the following: a display module, an input module, and a wireless communication module.

[0017] In a second aspect, an embodiment of the present application provides a water purification device, which includes the pre-device of the water purification device provided in the first aspect of the embodiment of the present application.

[0018] The technical solution provided by the embodiment of the present application detects the output voltage value of the first power supply circuit / mains power module through a first voltage detection circuit, and controls the switch of the second power supply circuit based on the output voltage value of the first power supply circuit / mains power module. For example, when the output voltage value of the first power supply circuit / mains power module drops to within a first preset voltage range, the second power supply circuit is controlled to change from an off state to an on state, so as to power the front-end device through the battery module, so that the control unit can control the water inlet electric valve to close under the power provided by the battery module, thereby cutting off the water supply waterway, thereby preventing the water inlet electric valve from being in an open state when the mains power is off and causing water leakage; and the output voltage value of the second power supply circuit / battery module can also be obtained in time through the second voltage detection circuit, and a low power warning message can be issued in time when the output voltage value of the second power supply circuit / battery module drops to within a second preset voltage range to remind the user to replace the battery module in time, so that the battery module can provide sufficient power to the front-end device when the mains power is off, ensuring that the control unit can close the water inlet electric valve in time, reducing the risk of water leakage, and ensuring the safety of user water use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a front-end device of a water purification device provided in an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of the power supply part of the front-end device provided in an embodiment of the present application;

[0021] Figure 3 Another structural schematic diagram of the front device of the water purification equipment provided in an embodiment of the present application;

[0022] Figure 4 A schematic structural diagram of a water leakage detection unit provided in an embodiment of the present application;

[0023] Figure 5 A schematic diagram of another structure of the front device of the water purification equipment provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram of the structure of a motor drive circuit provided in an embodiment of the present application;

[0025] Figure 7 A schematic diagram of a motor valve head detection circuit provided in an embodiment of the present application;

[0026] Figure 8 A schematic diagram of another structure of the front device of the water purification equipment provided in an embodiment of the present application;

[0027] Figure 9 A schematic diagram of the structure of a water purification device provided in an embodiment of the present application;

[0028] Reference numerals:

[0029] 10: AC power module; 11: Battery module; 12: First power supply circuit;

[0030] 13: second power supply circuit; 14: first voltage detection circuit; 15: second voltage detection circuit;

[0031] 16: Water inlet electric valve; 17: Control unit; 18: Voltage conversion unit;

[0032] 19: Water leakage detection unit; 20: Motor control circuit; 21: Flow detection unit;

[0033] 22: Communication module; 201: Motor drive circuit; 202: Motor valve head detection circuit. DETAILED DESCRIPTION

[0034] In order to make the objectives, technical solutions, and advantages of this application more clearly understood, the technical solutions in the embodiments of this application are further described in detail through the following embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate this application and are not intended to limit this application. It should also be noted that, for ease of description, the accompanying drawings only show parts relevant to this application, not all structures.

[0035] Figure 1 A schematic diagram of the structure of the front device of the water purification equipment provided in the embodiment of the present application. Figure 1 As shown, the front device of the water purification equipment includes: a mains module 10, a battery module 11, a first power supply circuit 12, a second power supply circuit 13, a first voltage detection circuit 14, a second voltage detection circuit 15, a water inlet electric valve 16 and a control unit 17. The mains module 10 is connected to the power supply terminal +VCC ( Figure 1 The battery module 11 is electrically connected to the power supply terminal +VCC through the second power supply circuit 13, and the control unit 17 obtains the working power supply through the power supply terminal +VCC, and the control unit 17 is also electrically connected to the water inlet electric valve 16; the first voltage detection circuit 14 is connected in series with the first power supply circuit 12, for detecting the output voltage value of the first power supply circuit 12 and sending it to the control unit 17, and the second voltage detection circuit 15 is connected in series with the second power supply circuit 13, for detecting the output voltage value of the second power supply circuit 13 and sending it to the control unit 17.

[0036] Typically, the front-end device is powered by the mains module 10. That is, when the mains module 10 is supplying power normally, the second power supply circuit 13 is in the off state. The first voltage detection circuit 14 is connected in series with the first power supply circuit 12. The control unit 17 can detect the output voltage of the first power supply circuit 12 / mains module 10 through the first voltage detection circuit 14 and control the switching of the second power supply circuit 13 and the opening and closing of the water inlet electric valve 16 based on the output voltage of the first power supply circuit 12 / mains module 10. For example, when the output voltage of the first power supply circuit 12 / mains module 10 drops to within a first preset voltage range, indicating that the mains module 10 is about to be powered off, the control unit 17 controls the second power supply circuit 13 to change from an off state to an on state, thereby supplying power to the control unit 17 and other power-consuming modules in the pre-installed device through the battery module 11 after the mains module 10 is powered off. At the same time, when the mains module 10 is detected to be powered off, if the water inlet electric valve 16 is in an open state, the control unit 17 can also control the water inlet electric valve 16 to close, cutting off the entire water supply path, thereby preventing water leakage caused by the water inlet electric valve 16 being in an open state when the mains power is off. For another example, when the output voltage of the first power supply circuit 12 / mains module 10 is still higher than the first preset voltage range, the second power supply circuit 13 continues to be in an off state and the water inlet electric valve 16 continues to be in an open state.

[0037] The battery module 11 acts as a backup power source. When the mains power is interrupted, the battery module 11 provides temporary power to the control unit 17 and other power modules in the front device, so that the power modules in the front device can obtain power energy when the mains power is interrupted, thereby being able to close the water inlet electric valve 16 in time to reduce the risk of water leakage. In addition, after the battery module 11 is powered by the second power supply circuit 13, the second voltage detection module 15 connected in series with the second power supply circuit 13 can also detect the output voltage value of the second power supply circuit 13 / battery module 11. When the output voltage value of the second power supply circuit 13 / battery module 11 drops to within a second preset range, it indicates that the remaining power of the battery module 11 is insufficient. The control unit 17 can then issue a low-battery warning message, thereby reminding the user to replace the battery module 11 in time. Optionally, the control unit 17 issues a low-battery warning message in at least one of the following ways: controlling the indicator light to flash, controlling the buzzer to emit an alarm sound, and sending a warning message to the terminal where the user is located.

[0038] Optionally, the control unit 17 may be a micro control unit (MCU) chip.

[0039] Alternatively, as Figure 2As shown, in the first power supply circuit 12, the positive electrode of the first diode D1 is electrically connected to the positive electrode +VIN of the mains module 10, the negative electrode of the first diode D1 is electrically connected to the power supply end +VCC through the voltage conversion unit 18, and the negative electrode of the mains module 10 is grounded. Among them, the voltage conversion unit 18 is used to perform voltage stabilization, filtering and other processing on the voltage output by the mains module 10 / battery module 11, and convert the voltage value output by the mains module 10 / battery module 11 into the voltage value required by the control unit 17 and other power modules in the front device. Optionally, the voltage conversion unit 18 may include an electrolytic capacitor E1, an electrolytic capacitor E2 and an integrated block U1, etc. In other words, Figure 2 The first diode D1 and the voltage conversion unit 18 form a first power supply circuit 12 , so that the AC power module 10 can provide power to the power-consuming module in the front device through the first power supply circuit 12 .

[0040] Optionally, the first voltage detection circuit 14 is connected in series with the first power supply circuit 12. In the first voltage detection circuit 14, one end of the first resistor R1 is connected to the positive electrode of the first diode D1, and the other end of the first resistor R1 is grounded through the second resistor R2. The end of the second resistor R2 is away from the ground (such as Figure 2 The ADC1 end in the middle is electrically connected to the control unit 17, that is, the first resistor R1 and the second resistor R2 form a first voltage detection circuit 14, and the control unit 17 detects the output voltage value of the mains module 10 / first power supply circuit 12 through the ADC1 end.

[0041] Continue to see Figure 2In the second power supply circuit 13, the source of the first P-channel MOS transistor Q1 is electrically connected to the positive electrode +VBAT of the battery module, the drain of the first P-channel MOS transistor is electrically connected to the anode of the second diode D2, and the cathode of the second diode D2 is electrically connected to the power supply terminal +VCC through the voltage conversion unit 18. The source and gate of the first P-channel MOS transistor Q1 are also electrically connected via a third resistor R3. The gate of the first P-channel MOS transistor Q1 is electrically connected to the collector of the first NPN transistor N1 via a fourth resistor R4. The base of the first NPN transistor N1 is electrically connected to the first enable terminal EN1 via a fifth resistor R5. The first enable terminal EN1 is electrically connected to the control unit 17 to obtain an enable signal. The base and emitter of the first NPN transistor N1 are also electrically connected via a sixth resistor R6. The emitter of the first NPN transistor N1 is grounded, and the negative electrode of the battery module 11 is grounded. The power supply terminal +VCC is primarily used to power the control unit 17 and other power-consuming modules within the front-end device. The third resistor R3, the first P-channel MOS transistor Q1, the fourth resistor R4, the first NPN transistor N1, the fifth resistor R5, the sixth resistor R6, and the voltage conversion unit 18 form a second power supply circuit 13. When the output voltage of the AC power module 10 drops to within a first preset voltage range, the control unit 17 inputs a high-level signal to the first enable terminal EN1, causing the first P-channel MOS transistor Q1 to turn on, thereby controlling the battery module 11 to provide power. After the AC power is restored, the first diode D1 turns on, and the AC power module 10 provides power. At the same time, the control unit 17 also inputs a low-level signal to the first enable terminal EN1, causing the first P-channel MOS transistor Q1 to turn off, thereby switching the power supply circuit of the battery module 11 and saving the power of the battery module 11.

[0042] Optionally, the second voltage detection circuit 15 is connected in series to the second power supply circuit 13. In the second voltage detection circuit 15, one end of the seventh resistor R7 is electrically connected to the anode of the second diode D2, and the other end of the seventh resistor R7 is grounded through the eighth resistor R8. The eighth resistor R8 is away from the ground end (such as Figure 2 The ADC2 terminal in the battery module is electrically connected to the control unit 17, that is, the seventh resistor R7 and the eighth resistor R8 form a second voltage detection circuit 15, and the control unit 17 detects the output voltage value of the battery module 11 / the second power supply circuit 13 through the ADC2 terminal.

[0043] In one embodiment, see Figure 3The front device of the water purification equipment may further include a water leakage detection unit 19, which is electrically connected to the power supply terminal +VCC and the control unit 17 respectively; the water leakage detection unit 19 is used to detect the induced electrical signal when the front device leaks and send it to the control unit 17; the control unit 17 is also used to determine the water leakage status of the front device according to the induced electrical signal, and display and warn the water leakage status, as well as control the water inlet electric valve 16 to close when the front device leaks.

[0044] Specifically, the water leakage detection unit 19 can be any detection device that can sense water leakage in the waterway. An electrode-type water leakage detection unit is usually used. The electrode-type water leakage detection unit uses the principle that water can cause the resistance between electrodes to decrease to detect whether the waterway is leaking. One or more water leakage detection units 19 can be set; the water leakage detection unit 19 is usually set at a location where water leakage is likely to occur. It can be set inside the front device of the water purification equipment or outside the front device. When multiple water leakage detection units 19 are set, it can be determined that the waterway is leaking when any water leakage detection unit 19 detects a water leakage signal. When a water leakage occurs, the control unit 17 controls the water inlet electric valve 16 to close, cutting off the water supply line to prevent continuous water leakage from causing flooding; and the control unit 17 can also display or warn of the water leakage situation to remind the user to perform maintenance or processing.

[0045] The water leakage detection unit 19 obtains its working power supply through the power supply terminal +VCC. When the mains power is normal, the water leakage detection unit 19 is powered by the mains power module 10. When the mains power is about to be interrupted, the control unit 17 controls the battery module 11 to be connected. Therefore, after the mains power is interrupted, the water leakage detection unit 19 can continue to be powered by the battery module 11. In this way, after the mains power is interrupted and the water inlet electric valve 16 is closed, the water leakage detection unit 19 can still detect whether there is a water leakage in the front device, and if there is a water leakage, an alarm prompt is issued.

[0046] Alternatively, as Figure 4As shown, in the water leakage detection unit 19, the second enable terminal EN2 is electrically connected to the base of the first PNP transistor N2 through the ninth resistor R9, the second enable terminal EN2 is electrically connected to the control unit 17 to obtain the enable signal, the emitter of the first PNP transistor N2 is electrically connected to the power supply terminal +VCC, the power supply terminal +VCC is further electrically connected to the base of the first PNP transistor N2 through the tenth resistor R10, the collector of the first PNP transistor N2 is electrically connected to the water leakage detection sensor through the eleventh resistor R11, and the water leakage detection sensor The device is also electrically connected to the base of the second NPN transistor N3 through the twelfth resistor R12, the base of the second NPN transistor N3 is also grounded through the first capacitor C1, the thirteenth resistor R13 is connected in parallel with the first capacitor C1, the emitter of the second NPN transistor N3 is grounded, the collector of the second NPN transistor N3 is electrically connected to the power supply terminal +VCC through the fourteenth resistor R14, the collector of the second NPN transistor N3 is also grounded through the fifteenth resistor R15 and the second capacitor C2, and the end of the second capacitor C2 away from the ground (such as Figure 4 The TEST end in the circuit is electrically connected to the control unit 17.

[0047] The water leakage detection sensor can be a detection probe or other sensor capable of detecting leakage in a waterway. Taking the detection probe as an example, the working principle of the water leakage detection unit 19 is described as follows: the detection probe 1 is electrically connected to the eleventh resistor R11, and the detection probe 2 is electrically connected to the twelfth resistor R12. When water leakage detection is required, the control unit 17 inputs a low-level signal to the second enable terminal EN2, and the first PNP transistor N2 is turned on. If the pre-device of the water purification equipment leaks and submerges the probes 1 and 2 of the leakage detection sensor, the power supply terminal +VCC forms a loop through the first PNP transistor N2, the eleventh resistor R11, probe 1, water, probe 2, the twelfth resistor R12, the thirteenth resistor R13, the second NPN transistor N3 and GND, the second NPN transistor N3 is turned on, and the TEST terminal is a low-level signal, that is, the control unit 17 determines that the pre-device is leaking when it detects that the TEST terminal outputs a low-level signal; if the pre-device is not leaking, the second NPN transistor N3 is turned off, and the TEST terminal is a high-level signal, that is, the control unit 17 determines that the pre-device is not leaking when it detects that the TEST terminal outputs a high-level signal. When water leakage detection is not required, the control unit 17 may input a high level signal to the second enable terminal EN2 , the first PNP transistor N2 is turned off, and the water leakage detection unit 19 does not work.

[0048] Optionally, when the AC power module 10 is used for power supply, the control unit 17 can input a low-level signal to the second enable terminal EN2, turning on the first PNP transistor N2 and causing the water leakage detection unit 19 to perform water leakage detection to promptly detect water leakage in the front-end device. After the AC power module 10 is disconnected and the battery module 11 is used for power supply, the control unit 17 controls the high and low levels of the signal input to the second enable terminal EN2 to control the water leakage detection unit 19 to intermittently perform water leakage detection, thereby avoiding the problem of excessive power loss in the battery module 11 caused by the continuous operation of the water leakage detection unit 19.

[0049] In one embodiment, Figure 5 As shown, the front device of the water purification equipment can also include a motor control circuit 20, which is electrically connected to the power supply end +VCC, the water inlet electric valve 16 and the control unit 17 respectively; the motor control circuit 20 includes a motor drive circuit 201 and a motor valve head detection circuit 202.

[0050] Specifically, the control unit 17 controls the rotation direction of the motor in the water inlet electric valve 16 through the motor drive circuit 201, thereby realizing the opening and closing of the valve in the water inlet electric valve 16, and when the output voltage value of the first power supply circuit 12 / mains power module 10 is reduced to within the first preset voltage range, the water inlet electric valve 16 is controlled to be closed through the motor drive circuit 201.

[0051] The motor valve head detection circuit 202 is used to detect the rotation state of the motor in the water inlet electric valve 16 and transmit it to the control unit 17. The control unit 17 adjusts the control signal of the motor drive circuit 201 based on the rotation state, thereby changing the rotation direction of the motor in the water inlet electric valve 16. For example, if the motor valve head detection circuit 202 detects that the forward rotation angle of the motor in the water inlet electric valve 16 has reached its maximum, the control unit 17 inputs a first control signal to the motor drive circuit 201 to control the motor in the water inlet electric valve 16 to begin reverse rotation. If the motor valve head detection circuit 202 detects that the reverse rotation angle of the motor in the water inlet electric valve 16 has reached its maximum, the control unit 17 inputs a second control signal to the motor drive circuit 201 to control the motor in the water inlet electric valve 16 to begin forward rotation. The first control signal and the second control signal are mutually opposite signals. For example, if the first control signal is a high-level signal, the second control signal is a low-level signal. Conversely, if the first control signal is a low-level signal, the second control signal is a high-level signal.

[0052] The motor valve head detection circuit 202 detects whether the motor rotation angle reaches the maximum. When the motor rotation angle reaches the maximum, the control unit 17 adjusts the motor rotation direction, which can avoid damage caused by excessive rotation of the motor in the water inlet electric valve 16 and improve the service life of the water inlet electric valve 16.

[0053] Alternatively, as Figure 6 As shown, in the motor drive circuit 201, the first input terminal M_IN1 is electrically connected to the base of the third NPN transistor N4 through the sixteenth resistor R16, the base and emitter of the third NPN transistor N4 are further electrically connected through the seventeenth resistor R17, the emitter of the third NPN transistor N4 is grounded, the collector of the third NPN transistor N4 is electrically connected to the gate of the first N-channel MOS transistor Q2, the source of the first N-channel MOS transistor Q2 is grounded, the drain of the first N-channel MOS transistor Q2 and the drain of the second P-channel MOS transistor Q3 are both electrically connected to the first motor control terminal M1+, the source of the second P-channel MOS transistor Q3 is electrically connected to the power supply terminal +VCC, and the source of the second P-channel MOS transistor Q3 is further electrically connected to the gate of the second P-channel MOS transistor Q3 through the eighteenth resistor R18; the first motor control terminal M1+ is electrically connected to the first port of the water inlet electric valve 16.

[0054] The second input terminal M_IN2 is electrically connected to the base of the fourth NPN transistor N5 through a nineteenth resistor R19. The base and emitter of the fourth NPN transistor N5 are further electrically connected through a twentieth resistor R20. The emitter of the fourth NPN transistor N5 is grounded. The collector of the fourth NPN transistor N5 is electrically connected to the gate of the second N-channel MOS transistor Q4. The source of the second N-channel MOS transistor Q4 is grounded. The drain of the second N-channel MOS transistor Q4 and the drain of the third P-channel MOS transistor Q5 are both electrically connected to the second motor control terminal M1-. The source of the third P-channel MOS transistor Q5 is electrically connected to the power supply terminal +VCC. The source of the third P-channel MOS transistor Q5 is further electrically connected to the gate of the third P-channel MOS transistor Q5 through a twenty-first resistor R21. The second motor control terminal M1- is electrically connected to the drain of the third P-channel MOS transistor Q5. The second motor control terminal M1- is electrically connected to the second port of the water inlet electric valve 16.

[0055] Specifically, the working principle of the motor drive circuit 201 is as follows: when the control unit 17 inputs a high-level signal to the first input terminal M_IN1 and a low-level signal to the second input terminal M_IN2, the third NPN transistor N4, the second P-channel MOS transistor Q3, and the second N-channel MOS transistor Q4 are turned on, and the fourth NPN transistor N5, the first N-channel MOS transistor Q2, and the third P-channel MOS transistor Q5 are turned off, then the first motor control terminal M1+ outputs a high-level signal, the second motor control terminal M1- outputs a low-level signal, and the motor in the water inlet electric valve 16 rotates forward; when the control unit 17 inputs a high-level signal to the first input terminal M_IN1 and a low-level signal to the second input terminal M_IN2, the third NPN transistor N4, the second P-channel MOS transistor Q3, and the second N-channel MOS transistor Q4 are turned on, and the fourth NPN transistor N5, the first N-channel MOS transistor Q2, and the third P-channel MOS transistor Q5 are turned off. When a low-level signal is input to the input terminal M_IN1 and a high-level signal is input to the second input terminal M_IN2, the third NPN transistor N4, the second P-channel MOS transistor Q3, and the second N-channel MOS transistor Q4 are turned off, and the fourth NPN transistor N5, the first N-channel MOS transistor Q2, and the third P-channel MOS transistor Q5 are turned on, then the first motor control terminal M1+ outputs a low-level signal, the second motor control terminal M1- outputs a high-level signal, and the motor in the water inlet electric valve 16 rotates in the reverse direction; when the first input terminal M_IN1 and the second input terminal M_IN2 are in other states, the motor in the water inlet electric valve 16 does not work.

[0056] Alternatively, as Figure 7 As shown, in the motor valve head detection circuit 202, one end of the twenty-second resistor R22 is electrically connected to the power supply end +VCC, the other end of the twenty-second resistor R22 is electrically connected to the third port of the water inlet electric valve 16, and the other end of the twenty-second resistor R22 is also electrically connected to the control unit 17 through the twenty-third resistor R23; one end of the twenty-fourth resistor R24 ​​is electrically connected to the power supply end +VCC, the other end of the twenty-fourth resistor R24 ​​is electrically connected to the fourth port of the water inlet electric valve 16, and the other end of the twenty-fourth resistor R24 ​​is also electrically connected to the control unit 17 through the twenty-fifth resistor R25.

[0057] Specifically, when the control unit 17 detects that a low-level signal is output from the side of the twenty-third resistor R23, it indicates that the angle of forward rotation of the motor valve head has reached the maximum, and the motor valve head needs to stop forward rotation. The control unit 17 inputs a low-level signal to the first input terminal M_IN1 and a high-level signal to the second input terminal M_IN2 to control the motor valve head to rotate in the reverse direction; when the control unit 17 detects that a low-level signal is output from the side of the twenty-fifth resistor R25, it indicates that the angle of reverse rotation of the motor valve head has reached the maximum, and the motor valve head needs to stop reverse installation. The control unit inputs a high-level signal to the first input terminal M_IN1 and a low-level signal to the second input terminal M_IN2 to control the motor valve head to rotate in the forward direction.

[0058] In one embodiment, optionally, Figure 8As shown, the front device of the water purification equipment also includes a flow detection unit 21, which is electrically connected to the power supply end +VCC and the control unit 17 respectively; the flow detection unit 21 is used to detect the water flow in the front device and send it to the control unit 17; the control unit 17 is also used to control the water inlet electric valve 16 to close when the water flow in the front device is abnormal, and to display and warn of the abnormal state.

[0059] Specifically, the flow detection unit 21 can be any detection device that can sense the water flow in the waterway, such as a flow meter. The water flow is detected by the flow detection unit 21, and the detected water flow is used to determine whether the waterway is leaking. The flow detection unit 21 can be set at a location where water leakage is likely to occur. It can be set inside the pre-installed device of the water purification equipment, or it can be set outside the pre-installed device. Setting the flow detection unit 21 at these non-water supply waterway locations can detect water leakage in the pre-installed device. For example, when the flow detection unit 21 set at these locations detects water flow or the water flow is greater than a preset threshold, it can be determined that a waterway leak has occurred. When a water leak occurs, the control unit 17 controls the water inlet electric valve 16 to close, cutting off the water supply waterway to prevent continuous water leakage from causing flooding; and the control unit 17 can also display or warn of water leakage to remind the user to perform maintenance or processing.

[0060] Of course, a flow detection unit 21 may also be provided in the water supply channel. The water flow detected by the flow detection unit 21 provided in the water supply channel may further estimate the user's water consumption, and thus estimate the filter element life of the pre-installed device.

[0061] Optionally, continue with Figure 8 The front-end device may further include a communication module 22, which is electrically connected to the control unit 17. The communication module 22 includes at least one of the following: a display module, an input module, and a wireless communication module. The wireless communication module may include a wireless fidelity (WIRE) module and any mobile communication module.

[0062] The front-end device of the water purification equipment can display the operating status and water leakage of the front-end device through the display module. It can also send various operating data such as the water leakage status of the front-end device and the remaining power of the battery module 11 to the user through the wireless communication module, prompting the user to perform maintenance or processing to ensure the user's water safety. The front-end device can also obtain the device operating parameters set by the user through the input module. Optionally, the front-end device can also include a sterilization module to sterilize the internal environment of the front-end device to ensure the user's water safety.

[0063] The front-end device of the water purification equipment provided in the embodiment of the present application detects the output voltage value of the first power supply circuit / mains power module through a first voltage detection circuit, and controls the switch of the second power supply circuit based on the output voltage value of the first power supply circuit / mains power module. For example, when the output voltage value of the first power supply circuit / mains power module drops to within a first preset voltage range, the second power supply circuit is controlled to change from an off state to an on state, so as to power the front-end device through the battery module, so that the control unit can control the water inlet electric valve to close under the power provided by the battery module, thereby cutting off the water supply waterway, thereby preventing the water inlet electric valve from being in an open state when the mains power is off, causing water leakage; and, the output voltage value of the second power supply circuit / battery module can also be obtained in time through the second voltage detection circuit, and a low power warning message can be issued in time when the output voltage value of the second power supply circuit / battery module drops to within a second preset voltage range, so as to remind the user to replace the battery module in time, so that the battery module can provide sufficient power to the front-end device when the mains power is off, ensuring that the control unit can close the water inlet electric valve in time, reducing the risk of water leakage, and ensuring the safety of user water use.

[0064] In one embodiment, Figure 9 As shown, a water purification device is also provided, which includes the pre-device of the water purification device described in any of the above embodiments.

[0065] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A pre-installed device for water purification equipment, characterized in that: include: A mains module, a battery module, a first power supply circuit, a second power supply circuit, a first voltage detection circuit, a second voltage detection circuit, a water inlet electric valve and a control unit, wherein the mains module is electrically connected to the power supply end through the first power supply circuit, the battery module is electrically connected to the power supply end through the second power supply circuit, the control unit obtains working power through the power supply end, and the control unit is electrically connected to the water inlet electric valve; the first voltage detection circuit is connected in series in the first power supply circuit, for detecting the output voltage value of the first power supply circuit and sending it to the control unit, the second voltage detection circuit is connected in series in the second power supply circuit, for detecting the output voltage value of the second power supply circuit and sending it to the control unit; the control unit controls the switch of the second power supply circuit and controls the opening and closing of the water inlet electric valve based on the output voltage value of the first power supply circuit.

2. The pre-installation device of the water purification equipment according to claim 1, characterized in that: Also includes: A water leakage detection unit is electrically connected to the power supply end and the control unit respectively.

3. The pre-installation device of the water purification equipment according to claim 1, characterized in that: Also includes: A motor control circuit is electrically connected to the power supply end, the water inlet electric valve and the control unit respectively; the motor control circuit includes a motor drive circuit and a motor valve head detection circuit.

4. The pre-installation device of the water purification equipment according to claim 1, characterized in that: Also includes: A flow detection unit is electrically connected to the power supply end and the control unit respectively.

5. The pre-installation device of the water purification equipment according to claim 1, characterized in that: In the first power supply circuit, the anode of the first diode is electrically connected to the anode of the mains module, the cathode of the first diode is electrically connected to the power supply end through the voltage conversion unit, and the cathode of the mains module is grounded; In the first voltage detection circuit, one end of the first resistor is connected to the anode of the first diode, and the other end is grounded through a second resistor, and an end of the second resistor away from the ground is electrically connected to the control unit; In the second power supply circuit, a source of a first P-channel MOS transistor is electrically connected to the positive electrode of the battery module, a drain of the first P-channel MOS transistor is electrically connected to the positive electrode of the second diode, a cathode of the second diode is electrically connected to the power supply end through the voltage conversion unit, a source and a gate of the first P-channel MOS transistor are further electrically connected via a third resistor, a gate of the first P-channel MOS transistor is electrically connected to the collector of a first NPN transistor via a fourth resistor, a base of the first NPN transistor is electrically connected to a first enable end via a fifth resistor, the first enable end is electrically connected to the control unit to obtain an enable signal, a base and an emitter of the first NPN transistor are further electrically connected via a sixth resistor, an emitter of the first NPN transistor is grounded, and a negative electrode of the battery module is grounded; In the second voltage detection circuit, one end of the seventh resistor is electrically connected to the anode of the second diode, and the other end is grounded through the eighth resistor, and the end of the eighth resistor away from the ground is electrically connected to the control unit.

6. The pre-installation device of the water purification equipment according to claim 2, characterized in that: In the water leakage detection unit, the second enable end is electrically connected to the base of the first PNP transistor through a ninth resistor, the second enable end is electrically connected to the control unit to obtain an enable signal, the emitter of the first PNP transistor is electrically connected to the power supply end, and the power supply end is also electrically connected to the base of the first PNP transistor through a tenth resistor, the collector of the first PNP transistor is electrically connected to the water leakage detection sensor through an eleventh resistor, and the water leakage detection sensor is also electrically connected to the base of the second NPN transistor through a twelfth resistor, the base of the second NPN transistor is also grounded through a first capacitor, a thirteenth resistor is connected in parallel with the first capacitor, the emitter of the second NPN transistor is grounded, the collector of the second NPN transistor is electrically connected to the power supply end through a fourteenth resistor, the collector of the second NPN transistor is also grounded through a fifteenth resistor and a second capacitor, and the end of the second capacitor away from the ground is electrically connected to the control unit.

7. The pre-installation device of the water purification equipment according to claim 3, characterized in that: In the motor drive circuit, the first input terminal is electrically connected to the base of the third NPN transistor through a sixteenth resistor, the base and emitter of the third NPN transistor are further electrically connected through a seventeenth resistor, the emitter of the third NPN transistor is grounded, the collector of the third NPN transistor is electrically connected to the gate of the first N-channel MOS transistor, the source of the first N-channel MOS transistor is grounded, the drain of the first N-channel MOS transistor and the drain of the second P-channel MOS transistor are both electrically connected to the first motor control terminal, the source of the second P-channel MOS transistor is electrically connected to the power supply terminal, and the source of the second P-channel MOS transistor is further electrically connected to the gate of the second P-channel MOS transistor through an eighteenth resistor; the first motor control terminal is electrically connected to the first port of the water inlet electric valve; The second input terminal is electrically connected to the base of the fourth NPN transistor through a nineteenth resistor. The base and emitter of the fourth NPN transistor are further electrically connected through a twentieth resistor. The emitter of the fourth NPN transistor is grounded. The collector of the fourth NPN transistor is electrically connected to the gate of the second N-channel MOS transistor. The source of the second N-channel MOS transistor is grounded. The drain of the second N-channel MOS transistor and the drain of the third P-channel MOS transistor are both electrically connected to the second motor control terminal. The source of the third P-channel MOS transistor is electrically connected to the power supply terminal. The source of the third P-channel MOS transistor is further electrically connected to the gate of the third P-channel MOS transistor through a twenty-first resistor. The second motor control terminal is electrically connected to the drain of the third P-channel MOS transistor. The second motor control terminal is electrically connected to the second port in the water inlet electric valve.

8. The pre-installation device of the water purification equipment according to claim 7, characterized in that: In the motor valve head detection circuit, one end of the twenty-second resistor is electrically connected to the power supply end, the other end of the twenty-second resistor is electrically connected to the third port of the water inlet electric valve, and the other end of the twenty-second resistor is further connected to the control unit via a twenty-third resistor; One end of the twenty-fourth resistor is electrically connected to the power supply end, the other end of the twenty-fourth resistor is electrically connected to the fourth port of the water inlet electric valve, and the other end of the twenty-fourth resistor is also electrically connected to the control unit through the twenty-fifth resistor.

9. The pre-installation device of the water purification equipment according to claim 1, characterized in that: Also includes: a communication module, the communication module being electrically connected to the control unit; The communication module includes at least one of the following: a display module, an input module, and a wireless communication module.

10. A water purification device, characterized in that: The water purification equipment includes the pre-device of the water purification equipment according to any one of claims 1 to 9.

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