Water production pressure control system and water purifier

Abstract

The utility model relates to a water purifier device, and discloses a water production pressure control system and a water purifier, which comprise a booster pump unit, a high-pressure switch unit, an electromagnetic valve unit and a main control unit, the high-voltage switch unit is connected with an interruption port of the main control unit; the booster pump unit is connected with a PWM (Pulse Width Modulation) control port of the main control unit, and the electromagnetic valve unit is connected with an IO (Input / Output) port of the main control unit. The water production pressure control system provided by the utility model is used for controlling the stop of water production, and is good in stability and easy to control.

Description

Technical Field

[0001] The utility model relates to a water purifier device, in particular to a water production pressure control system and a water purifier. Background Art

[0002] With the improvement of living standards, people's pursuit of water purifiers has become more extreme, from the original 50G to the current 1000G, 1200G, etc. However, when a large-throughput machine stops making water, the pressure at the high-pressure switch will become very high, which can easily damage the internal pressure sensor over time, causing the machine to malfunction.

[0003] For example, the prior art CN201820222326.2 discloses a new type of pressure switch for controlling the operation of a water purifier, including a pressure switch body, a connecting mechanism and a wiring mechanism, the connecting mechanism including a water inlet pipe, the water inlet pipe is fixedly connected to the outside of the bottom end of the pressure switch body, a connecting pipe is provided at one end of the water inlet pipe, a limiting sleeve is provided on the outside of the connection between the water inlet pipe and the connecting pipe, a clamping block is fixedly connected to one end of the water inlet pipe, one end of the clamping block is located on the inner side of the connecting pipe, a groove body is provided on the inner side of the limiting sleeve, the outer surface of the groove body on the inner side of the protrusion is fixedly connected to the protrusion, and the outer surface of the water inlet pipe on the inner side of the protrusion is fixedly connected to the connecting block. Summary of the Invention

[0004] Aiming at the problem of high shutdown pressure of a water production pressure control system in the prior art, the utility model proposes a water production pressure control system and a water purifier.

[0005] In order to solve the above technical problems, the present invention is solved by the following technical solutions:

[0006] A water pressure control system includes a booster pump unit, a high-pressure switch unit, a solenoid valve unit and a main control unit; the high-pressure switch unit is connected to the interrupt port of the main control unit; the booster pump unit is connected to the PWM control port of the main control unit, and the solenoid valve unit is connected to the IO port of the main control unit.

[0007] Preferably, a faucet unit is further included, and the faucet unit communicates with the main control unit via UART.

[0008] Preferably, the solenoid valve unit includes a water inlet solenoid valve, a flushing solenoid valve, a reflux solenoid valve and a water discharge solenoid valve; the water inlet solenoid valve, the flushing solenoid valve, the reflux solenoid valve and the water discharge solenoid valve are all connected to the IO port of the main control unit.

[0009] Preferably, the boost pump unit includes a MOSFET Q1, the G end of the MOSFET Q1 is connected to the PWM control port of the main control unit, the D end of the MOSFET Q1 is connected to the connecting diode D7, the capacitor C6 and the boost pump, and the S end of the MOSFET Q1 is grounded to the resistor R17.

[0010] Preferably, the high-voltage switch unit includes a capacitor C, one end of the capacitor C is connected to the resistor R11, and the other end is grounded.

[0011] Preferably, the system further includes a current detection unit, which is used to detect the current of the boost pump unit.

[0012] In order to solve the above technical problems, the present application also provides a water purifier, which includes the water pressure control system.

[0013] The utility model adopts the above technical solution:

[0014] The water production pressure control designed by the utility model can well control the water production pressure and has good stability.

[0015] The water purifier designed by the utility model greatly improves the stability of the machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Structural diagram of embodiment 1 of the present utility model;

[0017] Figure 2 This is a water production control flow chart of the utility model;

[0018] Figure 3 This is a circuit diagram of a high-voltage switch unit of the utility model;

[0019] Figure 4 This is a circuit diagram of the booster pump unit of the utility model;

[0020] Figure 5 This is a circuit diagram of a water inlet solenoid valve of the utility model. DETAILED DESCRIPTION

[0021] The present invention is described in further detail below with reference to the accompanying drawings and embodiments.

[0022] Example 1

[0023] A water pressure control system, Figure 1 It includes a boost pump unit, a high-voltage switch unit, a solenoid valve unit and a main control unit; the high-voltage switch unit is connected to the interrupt port of the main control unit; the boost pump unit is connected to the PWM control port of the main control unit, and the solenoid valve unit is connected to the IO port of the main control unit.

[0024] The system also includes a faucet unit that communicates with the main control unit via UART. The solenoid valve unit includes an inlet solenoid valve, a flushing solenoid valve, a return solenoid valve, and a drain solenoid valve; each of these valves is connected to the main control unit's IO port. Figure 4 The middle boost pump unit includes a MOSFET Q1, the G end of the MOSFET Q1 is connected to the PWM control port of the main control unit, the D end of the MOSFET Q1 is connected to the diode D7, the capacitor C6 and the boost pump, and the S end of the MOSFET Q1 and the resistor R17 are grounded. Figure 3 The medium and high voltage switch unit includes a capacitor C, one end of which is connected to the resistor R11 and the other end is grounded. The medium and high voltage switch unit also includes a current detection unit for detecting the current of the boost pump unit.

[0025] The faucet and MCU use UART communication to exchange instructions, and the baud rate is 9600.8 for full-duplex communication: the water supply and stop water supply instructions are transmitted according to the smart faucet communication protocol;

[0026] Water extraction instruction: Byte10.7=1, Byte11=20, Byte12=0xFF, Byte13=0xFF.

[0027] Stop command: Byte10.7=0, Byte11=0, Byte12=0, Byte13=0.

[0028] Through the PWM configuration inside the MCU, the pump drive pin is configured as a PWM port to send the duty signal to the MOS tube Q1 that controls the pump, thereby realizing the control of different pump duties.

[0029] When the high-voltage switch state changes, the MCU will enter a special interrupt program to process the MCU to control the opening and closing of all loads according to the processed high-voltage switch state.

[0030] Example 2

[0031] Based on Example 1, this embodiment is a water purifier, which includes the water pressure control system.

[0032] Example 3

[0033] Based on the above embodiments, Figure 2In this embodiment, when drawing water, the button on the smart faucet is operated to send a water drawing instruction to the main control MCU. The main control MCU opens the water inlet valve, booster pump, and drain valve, and the machine starts to discharge water. When the water needs to be stopped, the button on the smart faucet is operated to send a stop instruction to the main control MCU. When stopping water drawing, the intelligent pressure control method is executed. After receiving the stop water drawing instruction from the faucet, the main control MCU closes the drain valve and opens the return valve for a period of time T. At the same time, the duty cycle Duty of the booster pump is adjusted. After the high-pressure switch is disconnected, the water inlet valve, booster pump, and return valve are immediately closed. Alternatively, after waiting for T time, if the high-pressure switch has not yet disconnected, the return valve is closed first. After the high-pressure switch is disconnected, the water inlet valve and booster pump are immediately closed. This control method can greatly reduce the pressure during shutdown. Here, the two parameters T and Duty are adjustable.

[0034] Example 4

[0035] Based on the above embodiments, Figure 2 In this embodiment, when drawing water, the button on the smart faucet is operated to send a water drawing instruction to the main control MCU. The main control MCU opens the water inlet valve, booster pump, and drain valve, and the machine starts to discharge water. When the water needs to be stopped, the button on the smart faucet is operated to send a stop instruction to the main control MCU. When stopping water drawing, the intelligent pressure control method is executed. After receiving the stop water drawing instruction from the faucet, the main control MCU closes the drain valve and opens the flush valve for a period of time T. At the same time, the duty cycle Duty of the booster pump is adjusted. After the high-pressure switch is disconnected, the water inlet valve, booster pump, and flush valve are immediately closed. Alternatively, after waiting for T time, if the high-pressure switch has not been disconnected, the flush valve is closed first. After the high-pressure switch is disconnected, the water inlet valve and booster pump are immediately closed. This control method can greatly reduce the pressure during shutdown. Here, the two parameters T and Duty are adjustable.

[0036] Example 5

[0037] Different from Example 3, the pipeline machine water intake interface is opened, the high-pressure switch is closed: the water inlet valve and the booster pump are opened, the interface is closed, and the high-pressure switch is disconnected: the water inlet valve and the booster pump are closed. In this method, when it stops working, the pressure at the high-pressure switch will be very high, affecting the life of the switch and causing the system to be unable to work stably.

[0038] When the interface is open, the high-pressure switch closes: the water inlet valve and booster pump open according to a certain duty cycle. When the interface is closed, the high-pressure switch disconnects: the water inlet valve and booster pump shut down. This control method significantly reduces the pressure at the high-pressure switch during shutdown. If the high-pressure switch does not disconnect after a time interval T after closing the interface, the duty cycle is increased. Here, T and duty are adjustable.

Claims

1. A water pressure control system, characterized in that: It includes a boost pump unit, a high-voltage switch unit, a solenoid valve unit and a main control unit; the high-voltage switch unit is connected to the interrupt port of the main control unit; the boost pump unit is connected to the PWM control port of the main control unit, and the solenoid valve unit is connected to the IO port of the main control unit.

2. A water pressure control system according to claim 1, characterized in that: A faucet unit is also included, which communicates with the main control unit via UART.

3. A water pressure control system according to claim 1, characterized in that: The solenoid valve unit includes a water inlet solenoid valve, a flushing solenoid valve, a reflux solenoid valve and a water discharge solenoid valve; the water inlet solenoid valve, the flushing solenoid valve, the reflux solenoid valve and the water discharge solenoid valve are all connected to the IO port of the main control unit.

4. A water pressure control system according to claim 1, characterized in that: The boost pump unit includes a MOSFET Q1, the G end of the MOSFET Q1 is connected to the PWM control port of the main control unit, the D end of the MOSFET Q1 is connected to the diode D7, the capacitor C6 and the boost pump, and the S end of the MOSFET Q1 is grounded with the resistor R17.

5. The water pressure control system according to claim 1, characterized in that: The high-voltage switch unit includes a capacitor C, one end of the capacitor C is connected to the resistor R11, and the other end is grounded.

6. A water pressure control system according to claim 1, characterized in that: The system further comprises a current detection unit, which is used to detect the current of the boost pump unit.

7. A water purifier, characterized in that: It comprises the water production pressure control system described in any one of claims 1-6.

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