A fluid exchanger and its control method

Abstract

This invention relates to the field of liquid exchange technology and discloses a liquid exchanger and its control method. The liquid exchanger includes: a frame, a venturi tube, an inlet flow meter, an outlet flow meter, a controller, a dispensing pipe, a liquid exchanger, an outlet liquid exchange pipe, a main inlet pipe, a main outlet pipe, and a one-way valve. At least two dispensing pipes are selected. The controller, dispensing pipes, liquid exchanger, and outlet liquid exchange pipe are respectively mounted on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger. The outlet end of the dispensing pipe is connected to the inlet end of the liquid exchanger, and the outlet end of the liquid exchanger is connected to the inlet end of the outlet liquid exchange pipe. The one-way valve is mounted on the outlet liquid exchange pipe, and its opening direction is consistent with the liquid outlet direction. The outlet end of the outlet liquid exchange pipe is connected to one inlet end of the venturi tube. The other inlet end of the venturi tube is connected to the main inlet pipe via the inlet flow meter, and the outlet end of the venturi tube is connected to the main outlet pipe via the outlet flow meter. This liquid mixing system achieves simplified structure, convenient operation, and hydrophobic effects.

Description

Technical Field

[0001] This invention relates to the field of fluid exchange technology, and more specifically to a fluid exchanger and its control method. Background Technology

[0002] Soilless cultivation is a crop cultivation method that does not use soil as a substrate. Instead, it utilizes media such as water, peat moss, vermiculite, or directly places plant roots in a nutrient solution, artificially controlling the nutrients, water, and air conditions required for crop growth. Soilless cultivation breaks the limitations of soil, making it possible for crops to grow in a wider range of environments.

[0003] The nutrient solution is a novel type of nutrient solution synthesized using environmental biological ecological symbiosis technology and mycorrhizal symbiosis principles through processes such as bio-fermentation, chemical chelation, and physical activation. Nutrient solution is crucial for hydroponics, and different crops require different nutrient solution formulations. Many formulations have been published worldwide, but they are largely similar because the initial formulations originated from the chemical composition analysis of soil extracts. The biggest difference in nutrient solution formulations lies in the ratio of nitrogen to potassium. For different nutrient solutions, it is necessary to mix and exchange multiple nutrient solutions to meet the plant's growth needs. However, currently, nutrient solution mixing and exchange are done manually, which is time-consuming, labor-intensive, cumbersome, prone to errors or deviations that affect plant growth, and also inefficient and costly. To better apply a nutrient solution exchanger in hydroponics, allowing direct mixing of nutrient solution source liquid with clean water for direct irrigation of plants, eliminating the need for a mixing container, supporting multiple nutrient solutions, and allowing for individually adjustable ratios, a new type of nutrient solution exchanger has been designed and developed.

[0004] Therefore, existing fluid exchange technologies need further improvement to address the above issues. Summary of the Invention

[0005] The purpose of this invention is to overcome the problems of existing fluid exchange technologies, such as manual operation, time and labor consumption, complex structure, cumbersome operation, short service life, easy corrosion, liquid retention, and resource waste. By rationally designing the fluid exchange technology, and using a frame, venturi tube, inlet flow meter, outlet flow meter, controller, dispensing pipe, fluid exchanger, outlet pipe, main inlet pipe, main outlet pipe, and check valve, combined with a fluid exchanger consisting of a base, housing, inlet pipe, outlet pipe, fluid exchange controller, drive motor, and fluid exchange mechanism, the fluid exchanger can achieve a simplified structure, convenient operation, durable use, reduced corrosion, and reduced liquid retention and resource waste.

[0006] The specific technical solution of the present invention is as follows:

[0007] A liquid exchanger, the liquid mixing system comprising: a frame, a venturi tube, an inlet flow meter, an outlet flow meter, a controller, a dispensing pipe, a liquid exchanger, an outlet liquid exchange pipe, a main inlet pipe, a main outlet pipe, and a one-way valve. At least two dispensing pipes are selected. The controller, dispensing pipes, liquid exchanger, and outlet liquid exchange pipe are respectively mounted on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger. The outlet end of the dispensing pipe is connected to the inlet end of the liquid exchanger. The outlet end of the liquid exchanger is connected to the inlet end of the outlet liquid exchange pipe. The one-way valve is mounted on the outlet liquid exchange pipe, and the opening of the one-way valve is consistent with the liquid outlet direction. The outlet end of the outlet liquid exchange pipe is connected to one inlet end of the venturi tube. The other inlet end of the venturi tube is connected to the main inlet pipe via the inlet flow meter. The outlet end of the venturi tube is connected to the main outlet pipe via the outlet flow meter.

[0008] Furthermore, the liquid changer includes: a base, a housing, an inlet pipe, an outlet pipe, a liquid changer controller, a drive motor, and a liquid changer mechanism. The base is installed on the bottom of the housing, and the base and housing form a cavity. The liquid changer controller, drive motor, and liquid changer mechanism are all disposed in the cavity. The inlet pipe and outlet pipe are both installed on the base. The outlet end of the inlet pipe is connected to the inlet end of the liquid changer mechanism, and the outlet end of the liquid changer mechanism is connected to the inlet end of the outlet pipe. The liquid changer mechanism is used to transfer the liquid from the inlet pipe to the outlet pipe. The liquid changer mechanism is installed on the drive end of the drive motor, and the drive motor is installed on the housing. The control end of the drive motor is electrically connected to the control end of the liquid changer controller.

[0009] Furthermore, both the base and the housing are made of metal or plastic.

[0010] Furthermore, at least two liquid outlet pipes are selected, and the liquid inlet pipe is installed in the middle of the base, while the liquid outlet pipe is installed on the side of the base.

[0011] Furthermore, the liquid changing mechanism includes a liquid changing base, a liquid changing top plate, and a drive plate. The liquid changing base is mounted on the base, the drive plate is mounted on the drive end of the drive motor, and the liquid changing top plate is mounted on the drive plate. The liquid changing base and the liquid changing top plate form a liquid changing chamber and are used to change the liquid. The inlet pipe and the outlet pipe both pass through the liquid changing base into the liquid changing chamber.

[0012] Furthermore, the liquid exchange chassis is provided with a chassis auxiliary flow channel, which is used to discharge excess liquid.

[0013] Furthermore, the liquid exchange top plate is provided with a top plate auxiliary flow channel and a liquid exchange flow channel. The liquid exchange flow channel is located in the middle of the liquid exchange top plate, and the top plate auxiliary flow channel is located on the edge of the liquid exchange top plate. The liquid exchange flow channel is used to connect or disconnect the inlet pipe and the outlet pipe.

[0014] Furthermore, the liquid changing base is a circular liquid changing base, and the liquid changing top plate is a circular liquid changing top plate, and the liquid changing base and the liquid changing top plate have the same diameter.

[0015] Furthermore, the chassis auxiliary flow channel is selected as an annular chassis auxiliary flow channel, the top plate auxiliary flow channel is selected as an annular top plate auxiliary flow channel, and the diameters of the top plate auxiliary flow channel and the chassis auxiliary flow channel are the same.

[0016] Furthermore, the base is provided with a limiting component, and the fluid changing tray is provided with a limiting groove. The limiting component and the limiting groove cooperate with each other and are used to limit the fluid changing tray.

[0017] Furthermore, the housing includes a cover and a housing, the cover is installed on the top of the housing, the base is installed on the bottom of the housing, and the drive motor is installed on the housing.

[0018] Furthermore, the base is provided with heat sinks.

[0019] Furthermore, the fluid exchange chassis is made of hydrophobic ceramic material.

[0020] Furthermore, the liquid exchange top plate is made of hydrophobic ceramic material.

[0021] Furthermore, the base is provided with a limiting component, and the fluid changing tray is provided with a limiting groove. The limiting component and the limiting groove cooperate with each other and are used to limit the fluid changing tray.

[0022] Furthermore, a method for operating a fluid exchanger, the method comprising the following steps:

[0023] Step 1: Fabrication of hydrophobic ceramic materials

[0024] Alumina powder was selected, and the liquid changing base plate and liquid changing top plate were respectively produced by high-temperature firing using corresponding molds with liquid changing base plate and liquid changing top plate;

[0025] Weigh 3-5 parts by weight of polymethylhydrosiloxane, 10-15 parts of polystyrene, 30-40 parts of alumina and 45-50 parts of chloroform. First, add polymethylhydrosiloxane to chloroform and stir for 10 minutes. Then, add alumina powder to the above solution and continue stirring for 1 hour. After it is stirred evenly, slowly add polystyrene to the mixture and stir for 30 minutes to prepare a hydrophobic coating mixture.

[0026] Add the hydrophobic coating mixture into the spraying machine, and use the spraying machine to evenly spray the hydrophobic coating mixture onto the surface of the liquid changing base plate and the liquid changing top plate. After the spraying is completed, place the liquid changing base plate and the liquid changing top plate in a drying oven at 100°C for 1 hour to prepare the hydrophobic liquid changing base plate and the hydrophobic liquid changing top plate.

[0027] Step Two: Fabrication of the Fluid Replacement Controller

[0028] Select an MCU circuit, an RS485 communication circuit, a power supply circuit, a power bus interface circuit, a current detection circuit, a button circuit, and a motor drive circuit. Connect the power output terminal of the power supply circuit to the power input terminals of the MCU circuit, RS485 communication circuit, power bus interface circuit, current detection circuit, button circuit, and motor drive circuit, respectively. Connect the motor control terminal of the motor drive circuit to the motor control terminal of the MCU circuit. Connect the communication terminal of the RS485 communication circuit to the communication terminal of the MCU circuit. Connect the interface terminal of the power bus interface circuit to the interface terminal of the MCU circuit. Connect the detection terminal of the current detection circuit to the detection terminal of the MCU circuit. Connect the button terminal of the button circuit to the button terminal of the MCU circuit to create a liquid changing controller.

[0029] Step 3: Assembly of the fluid exchanger

[0030] Based on steps one and two, select the base, container shell, inlet pipe, multiple outlet pipes, liquid exchange controller, drive motor, liquid exchange base plate, liquid exchange top plate, drive sealing ring, base plate sealing ring, and drive disc. Install the base on the bottom of the container shell, forming a container cavity with the base and container shell. Place the liquid exchange controller, drive motor, liquid exchange base plate, liquid exchange top plate, drive sealing ring, base plate sealing ring, and drive disc within the container cavity. Install the inlet pipe in the middle of the base, and install the multiple outlet pipes on the sides of the base. The inlet and outlet pipes pass through the liquid exchange base plate into the liquid exchange cavity. The liquid exchange top plate and liquid exchange base plate cooperate with each other. The liquid exchange base plate is installed on the base, the drive disc is installed on the drive end of the drive motor, the liquid exchange top plate is installed on the drive disc, and the drive motor is installed on the container shell. The drive motor is controlled... The control terminal of the liquid exchange controller is electrically connected. The liquid exchange chassis is equipped with a chassis auxiliary flow channel to drain excess liquid. The liquid exchange top plate is equipped with a top plate auxiliary flow channel and a liquid exchange flow channel. The liquid exchange flow channel is located in the middle of the top plate, and the top plate auxiliary flow channel is located at the edge of the top plate. The liquid exchange flow channel is used to connect or disconnect the inlet and outlet pipes. A limiting component is provided on the base, and a limiting groove is provided on the liquid exchange chassis. The limiting component and the limiting groove cooperate to limit the liquid exchange chassis. A drive sealing ring is provided at the drive plate to seal and prevent water from flowing into the drive motor. A chassis sealing ring is provided on the liquid exchange chassis to seal the connection between the inlet and outlet pipes and the liquid exchange chassis. Here, the liquid exchange chassis and liquid exchange top plate from step one are selected.

[0031] Step 4: Assembly of the liquid mixing system

[0032] Select the liquid exchanger from step three, then select the frame, venturi tube, inlet flow meter, outlet flow meter, controller, dispensing pipe, liquid exchanger, liquid exchange outlet pipe, main inlet pipe, main outlet pipe, and check valve. Select at least two dispensing pipes. The controller, dispensing pipe, liquid exchanger, and liquid exchange outlet pipe are respectively installed on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger. The outlet end of the dispensing pipe is connected to the inlet end of the liquid exchanger. The outlet end of the liquid exchanger is connected to the inlet end of the liquid exchange outlet pipe. The check valve is installed on the liquid exchange outlet pipe, and its opening direction is consistent with the liquid outlet direction. The outlet end of the liquid exchange outlet pipe is connected to one inlet end of the venturi tube. The other inlet end of the venturi tube is connected to the main inlet pipe via the inlet flow meter. The outlet end of the venturi tube is connected to the main outlet pipe via the outlet flow meter.

[0033] The fluid replacement controller includes a control circuit board, which comprises an MCU circuit, an RS485 communication circuit, a power supply circuit, a power bus interface circuit, a current detection circuit, a button circuit, and a motor drive circuit. The power output terminal of the power supply circuit is connected to the power input terminals of the MCU circuit, RS485 communication circuit, power bus interface circuit, current detection circuit, button circuit, and motor drive circuit, respectively. The motor control terminal of the motor drive circuit is connected to the motor control terminal of the MCU circuit. The communication terminal of the RS485 communication circuit is connected to the communication terminal of the MCU circuit. The interface terminal of the power bus interface circuit is connected to the interface terminal of the MCU circuit. The detection terminal of the current detection circuit is connected to the detection terminal of the MCU circuit. The button terminal of the button circuit is connected to the button terminal of the MCU circuit.

[0034] The power supply circuit includes a high-voltage circuit, a medium-voltage circuit, a low-voltage circuit, a voltage regulator circuit, a power supply AD circuit, and a power protection circuit. The power output terminal of the high-voltage circuit is connected to the power input terminal of the medium-voltage circuit and the power input terminal of the power supply AD circuit. The power output terminal of the medium-voltage circuit is connected to the power input terminal of the low-voltage circuit. The power output terminal of the low-voltage circuit is connected to the power input terminal of the voltage regulator circuit. The power output terminal of the voltage regulator circuit is connected to the power input terminal of the power protection circuit.

[0035] Among them, the high voltage circuit uses a 55V power supply, the medium voltage circuit uses a 24V power supply circuit, the low voltage circuit uses a 12V power supply circuit, and the power protection circuit uses an NTC circuit.

[0036] The voltage regulator circuit includes a voltage regulator chip N55, capacitors C47, C49, and C50, and an inductor L41. The "IN" terminal of the voltage regulator chip N55 is connected in parallel to capacitor C47 and a 12V DC power supply. The "OUT" terminal of the voltage regulator chip N55 is connected in parallel to capacitor C49 and inductor L41 and outputs a 5V DC power supply. The other end of inductor L41 is connected in parallel to capacitor C50 and the output terminal of a 3.3V DC power supply. The "GND" terminal of the voltage regulator chip N55, the other end of capacitor C47, the other end of capacitor C49, and the other end of capacitor C50 are all grounded.

[0037] The NTC circuit includes a thermistor RT40, a resistor R79, and a capacitor C53. The output terminal of the 3.3V DC power supply is connected to the resistor R79. The other end of the resistor R79 is connected in parallel to the thermistor RT40, the N44 "33" terminal of the chip, and the capacitor C53. The other end of the thermistor RT40 and the other end of the capacitor C53 are grounded together.

[0038] The RS485 communication circuit includes chip N57, resistors R70, R76, R77, R81, R82, capacitor C52, and ESD diode D40. Terminal "1" of chip N57 is connected to terminal "39" of chip N44 via resistor R7. Terminals "2" and "3" of chip N57 are connected to terminal "37" of chip N44. Terminal "4" of chip N57 is connected to terminal "38" of chip N44. Terminal "8" of chip N57 and capacitor C52 are connected to a 5V DC power supply. Terminal 7 of N57 is connected to terminal 7 of chip X11 through resistor R81. Terminal 6 of chip N57 is connected to terminal 8 of chip X11 through resistor R82. One end of resistor R77 is connected to terminal 7 of chip N57. One negative terminal of ESD diode D40 is connected to terminal 7 of chip X11, and the other negative terminal of ESD diode D40 is connected to terminal 8 of chip X11. The positive terminal of ESD diode D40 is grounded together with the other end of capacitor C52, the other end of resistor R77, and terminal 5 of chip N57.

[0039] The current detection circuit includes chip N13, resistor R25, capacitor C27, resistor R22, resistor R21, resistor R23, diode D16, and capacitor C29. Terminal 1 of chip N13 is grounded together with terminal 2 of chip N13 through resistor R22. Terminal 5 of chip N13 is connected to a 3.3V DC power supply together with capacitor C29. The other end of capacitor C29 is grounded. Terminal 4 of chip N13 is connected in parallel with resistor R25, capacitor C27, and terminal 32 of chip N44. The other end of resistor R25 and the other end of capacitor C27 are connected in parallel with terminal 3 of chip N13 and resistor R21. The other end of resistor R21 is connected together with the negative terminal of diode D16, resistor R23, and terminal 3 of chip X11. The positive terminal of diode D16 and the other end of resistor R23 are grounded together.

[0040] The 24V power supply circuit includes chip N11, resistors R11 and R17, capacitors C16 and R19, inductor L11, resistor R13, capacitors C11, C13, and C14, resistor R14, capacitor C18, capacitor C20, and diode D11. Terminal "1" of chip N11 is connected to capacitor C20. The other end of capacitor C20 is connected in parallel to terminal "6" of chip N11, one end of inductor L11, and the cathode of diode D11. Terminal "3" of chip N11 is connected in parallel to resistors R19 and R17, and capacitor C16. The other end of resistor R17... Connect resistor R11. The other end of resistor R11 is connected in parallel to the other end of capacitor C16, 24V DC power supply, capacitor C13, capacitor C14, and the other end of inductor L11. Terminal 5 of chip N11 is connected in parallel to 55V DC power supply, capacitor C11, and resistor R13. The other end of resistor R13 is connected in parallel to resistor R14, capacitor C18, and terminal 4 of chip N11. Terminal 2 of chip N11 is grounded together with the other ends of capacitor C11, capacitor C13, capacitor C14, resistor R14, capacitor C18, and the positive terminal of diode D11.

[0041] The 12V power supply circuit includes chip N12, resistors R12 and R18, capacitors C17 and R20, inductor L12, resistor R15, capacitors C12 and C15, resistor R16, capacitor C19, capacitor C21, and diode D12. Terminal "1" of chip N12 is connected to capacitor C21. The other end of capacitor C21 is connected in parallel to terminal "6" of chip N12, one end of inductor L12, and the cathode of diode D12. Terminal "3" of chip N12 is connected in parallel to resistors R20, R18, and capacitor C17. 18. The other end is connected to resistor R12. The other end of resistor R12 is connected in parallel to the other end of capacitor C17, 12V DC power supply, capacitor C15, and the other end of inductor L12. The "5" terminal of chip N12 is connected in parallel to 24V DC power supply, capacitor C12, and resistor R15. The other end of resistor R15 is connected in parallel to resistor R16, capacitor C19, and the "4" terminal of chip N11. The "2" terminal of chip N12, the other end of capacitor C12, the other end of capacitor C15, the other end of resistor R16, the other end of capacitor C19, and the positive terminal of diode D12 are all grounded.

[0042] The power bus interface circuit includes chip X11, diode D13, fuse FU11, and diode D14. Terminals "1" and "2" of chip X11 are connected to a 55V DC power supply. Terminal "4" of chip X11 is connected to terminal "3" of chip X11. Terminal "5" of chip X11 is connected to terminals "36" of chip N44. Terminal "6" of chip X11 is connected to the negative terminal of diode D13. The positive terminal of diode D13 is connected to one end of fuse FU11. The other end of fuse FU11 is connected in parallel to a 12V DC power supply and the negative terminal of diode D14. The positive terminal of diode D14 is grounded.

[0043] The control circuit board further includes a motor interface circuit, which includes a chip X13. Terminal "1" of chip X13 is connected to terminals "2" and "3" of chip N14. Terminal "3" of chip X13 is connected to terminals "34" and "35" of chip N14. Terminal "2" of chip X13 is connected to terminals "16" and "17" of chip N14. Terminal "4" of chip X13 is connected to terminals "20" and "21" of chip N14.

[0044] The button circuit includes interface X42, resistors R48, R57, R53, R58, R54, R59, R60, LED40, and LED41. Terminal "1" of interface X42 is connected to resistor R57. The other end of resistor R57 is connected in parallel to resistors R48, R58, and terminal "30" of chip N44. The other end of resistor R48 is connected to a 3.3V DC power supply. The other end of resistor R58 is connected to terminal "2" of interface X42. Terminal "3" of interface X42... The chip is connected to the N44 "35" terminal via resistor R53. The X42 "4" terminal is connected to the N44 "34" terminal via resistor R54. The N44 "35" terminal is connected to resistor R59. The other end of resistor R59 is connected to the positive terminal of LED40. The N44 "34" terminal is connected to resistor R60. The other end of resistor R60 is connected to the positive terminal of LED41. The X42 "5" terminal, the negative terminals of LED40 and LED41 are grounded together. This X42 interface will be connected to the button detection board.

[0045] The power supply AD circuit includes resistors R65, R66, R67 and C48. Resistor R65 is connected to a 55V DC power supply. The other end of resistor R65 is connected to resistor R66. The other end of resistor R66 is connected in parallel to the N44 "31" terminal, resistor R67 and capacitor C48. The other ends of resistor R67 and capacitor C48 are grounded together.

[0046] The MCU circuit includes capacitor C40, resistor R40, capacitor C41, resistor R44, capacitor C42, resistor R45, capacitor C43, capacitor C44, capacitor C45, capacitor C46, ​​inductor L40, and chip N44. Pin "14" of chip N44 is connected in parallel to one end of capacitor C45, one end of capacitor C46, ​​one end of inductor L40, and one end of capacitor C44. Pin "15" of chip N44 shares a common ground with the other ends of capacitors C45 and C46. Inductor L40... The other end of pin 40 is connected to a 3.3V DC power supply. Pin 28 of chip N44 is connected in parallel to one end of capacitor C44, one end of resistor R45, one end of resistor R40, one end of capacitor C41, one end of resistor R44, and pin 42 of chip N44. The other end of capacitor C44 is grounded. Pin 29 of chip N44 is grounded. Pin 36 of chip N44 is connected in parallel to the other end of resistor R45 and one end of capacitor C43. The other end of capacitor C43 is grounded. The other end of capacitor C41 is grounded. Pin "40" of chip N44 is connected in parallel to the other end of resistor R40 and one end of capacitor C40. The other end of capacitor C40 is grounded. Pin "43" of chip N44 is grounded. Pin "48" of chip N44 is connected in parallel to the other end of resistor R44 and one end of capacitor C42. The other end of capacitor C42 is grounded together with pin "49" of chip N44. Pin "1" of chip N44 is connected in parallel to terminal "4" of photoelectric switch I1 and one end of resistor R42. Pin "2" of chip N44 is connected in parallel to... The "4" terminal of photoelectric switch I2 and one end of resistor R45 are connected in parallel to the "3" pin of chip N44. The "4" terminal of photoelectric switch I3 and one end of resistor R49 are connected in parallel to the "20" pin of chip N44. The "4" terminal of photoelectric switch I4 and one end of resistor R56 are connected in parallel to the "21" pin of chip N44. The "4" terminal of photoelectric switch I5 and one end of resistor R62 are connected in parallel to the "25" pin of chip N44. The "4" terminal of photoelectric switch I6 and one end of resistor R64 are connected in parallel.

[0047] The motor drive circuit includes chip N14, resistor R32, capacitors C23, C33, C30, C31, C22, C23, C24, C25, C26, C28, diode D15, and resistor R24. Pin "1" of chip N14 is connected in parallel to pin "36" of chip N14, one end of resistor R32, one end of capacitor C32, and pin "30" of chip N14. The other end of resistor R32, the other end of capacitor C32, pin "31" of chip N14, and one end of capacitor C33 are grounded. The other end of capacitor C33 is connected to pin "29" of chip N14. Pin "25" of chip N14 is connected to pin "26" of chip N14 through capacitor C30. Pin "24" of chip N14... Connect one end of capacitor C31. The other end of capacitor C31 is connected to a 55V DC power supply along with pin "22" of chip N14. Pin "19" of chip N14 is connected in parallel to pin "18" and pin "12" of chip N14, one end of resistor R24, and one end of capacitor C28. Pin "13" of chip N14, the other end of capacitor C28, and the other end of resistor R24 ​​are grounded together. Pin "15" of chip N14, one end of capacitors C22, C23, C24, C25, and C26 connected in parallel, and the negative terminal of diode D15 are connected to a 55V DC power supply. The other end of capacitors C22, C23, C24, C25, and C26 connected in parallel and the positive terminal of diode D15 are grounded together. Diode D15 is selected as a Zener diode.

[0048] Beneficial effects

[0049] This invention, through a rational design of the fluid exchange technology, employs a frame, venturi tube, inlet flow meter, outlet flow meter, controller, dispensing pipe, fluid exchanger, outlet pipe, main inlet pipe, main outlet pipe, and check valve. Combined with a base, housing, inlet pipe, outlet pipe, fluid exchange controller, drive motor, and fluid exchange mechanism, this fluid exchanger achieves a simplified structure and convenient operation. It also ensures durability, reduces corrosion, and minimizes liquid retention and resource waste. The use of a hydrophobic ceramic coating enhances the hydrophobic effect of the fluid exchange base and top plate, achieving a hydrophobic angle of up to 160°, providing excellent hydrophobic performance. Attached Figure Description

[0050] Figure 1 This is a schematic diagram of the structure of a fluid exchanger according to the present invention.

[0051] Figure 2 This is a schematic diagram of the internal structure of a fluid exchanger according to the present invention.

[0052] Figure 3 This is a schematic diagram of the structure of a fluid exchanger according to the present invention.

[0053] Figure 4 This is a schematic diagram of the exploded structure of a fluid exchanger according to the present invention.

[0054] Figure 5 This is an exploded structural diagram of a fluid exchanger according to the present invention from another perspective.

[0055] Figure 6 This is a cross-sectional structural diagram of a fluid exchanger according to the present invention.

[0056] Figure 7 This is a SEM image of the ceramic fluid exchanger of the fluid exchanger according to the present invention.

[0057] Figure 8 This is a schematic diagram of the contact angle of the ceramic in the fluid exchanger of the present invention.

[0058] Figure 9 This is a test diagram of the fluid exchange flow rate of a fluid exchanger according to the present invention.

[0059] Figure 10 This is a control circuit diagram of a fluid exchanger according to the present invention.

[0060] Figure 11 This is a partial diagram of the control circuit of a fluid exchanger according to the present invention.

[0061] Figure 12 This is another part of the control circuit of a fluid exchanger according to the present invention.

[0062] Reference numerals: 01. Outlet pipe; 02. Inlet pipe; 03. Heat sink; 04. Housing; 05. Housing cover; 06. Drive motor; 07. Drive sealing ring; 08. Drive disc; 09. Top plate for liquid exchange; 10. Bottom plate for liquid exchange; 11. Bottom plate sealing ring; 12. Limiting component; 13. Bottom plate auxiliary flow channel; 14. Outlet end; 15. Inlet end; 31. Frame; 32. Inlet pipe flow meter; 33. Venturi tube; 34. Outlet pipe flow meter; 35. Controller; 36. Liquid exchanger; 37. Outlet pipe for liquid exchange; 38. Check valve; 39. Control circuit board; 310. Distributor pipe. Detailed Implementation

[0063] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0064] See Figures 1-6As shown, the present invention provides a liquid exchanger. The liquid mixing system includes: a frame 31, a venturi tube 33, an inlet flow meter 32, an outlet flow meter 34, a controller, a dispensing pipe 310, a liquid exchanger 36, a liquid exchange outlet pipe 37, a main inlet pipe, a main outlet pipe, and a one-way valve 38. At least two dispensing pipes are selected. The controller, dispensing pipes, liquid exchanger, and liquid exchange outlet pipe are respectively mounted on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger, and the outlet end of the dispensing pipe is connected to... The inlet end of the fluid changer is connected to the inlet end of the fluid outlet pipe. A one-way valve is installed on the fluid outlet pipe, and the opening of the one-way valve is in the same direction as the fluid outlet. The outlet end of the fluid outlet pipe is connected to one inlet end of the Venturi tube. The other inlet end of the Venturi tube is connected to the main inlet pipe through an inlet pipe flow meter. The outlet end of the Venturi tube is connected to the main outlet pipe through an outlet pipe flow meter. The controller includes a controller 35 and a control circuit board 39, and the controller and the control circuit board are electrically connected.

[0065] The liquid changer 36 includes: a base, a housing 04, an inlet pipe 02, an outlet pipe 01, a liquid changer controller, a drive motor 06, and a liquid changer mechanism. The base and housing 04 are made of metal or plastic. There are 5 outlet pipes 01 and 1 inlet pipe 02.

[0066] The base is installed on the bottom of the container 04, and the base and the container 04 form a container cavity. The liquid exchange controller, drive motor 06 and liquid exchange mechanism are all set in the container cavity. The inlet pipe 02 and the outlet pipe 01 are both installed on the base. The outlet end 14 of the inlet pipe 02 is connected to the inlet end 15 of the liquid exchange mechanism, and the outlet end 14 of the liquid exchange mechanism is connected to the inlet end 15 of the outlet pipe 01. The liquid exchange mechanism is used to transfer the liquid from the inlet pipe 02 to the outlet pipe 01. The liquid exchange mechanism is installed on the drive end of the drive motor 06, and the drive motor 06 is installed on the container 04. The control end of the drive motor 06 is electrically connected to the control end of the liquid exchange controller. The inlet pipe 02 is installed in the middle of the base, and the outlet pipe 01 is installed on the side of the base.

[0067] The liquid changing mechanism includes a liquid changing base 10, a liquid changing top plate 09, and a drive plate 08. The liquid changing base 10 is mounted on a base, the drive plate 08 is mounted on the drive end of a drive motor 06, and the liquid changing top plate 09 is mounted on the drive plate 08. The liquid changing base 10 and the liquid changing top plate 09 form a liquid changing chamber for changing liquid. An inlet pipe 02 and an outlet pipe 01 both pass through the liquid changing base 10 into the liquid changing chamber. The liquid changing base 10 is provided with a base auxiliary flow channel 13 for discharging excess liquid. The liquid changing top plate 09 is provided with a top plate auxiliary flow channel and a liquid changing flow channel. In the middle of the liquid exchange top plate 09, the top plate auxiliary flow channel is set at the edge of the liquid exchange top plate 09. The liquid exchange flow channel is used to connect or disconnect the connection between the liquid inlet pipe 02 and the liquid outlet pipe 01. The liquid exchange base plate 10 is made of hydrophobic ceramic material. The liquid exchange top plate 09 is made of hydrophobic ceramic material. The liquid exchange base plate 10 is circular, and the liquid exchange top plate 09 is circular, and the diameters of the liquid exchange base plate 10 and the liquid exchange top plate 09 are the same. The base plate auxiliary flow channel 13 is annular, and the top plate auxiliary flow channel is annular, and the diameters of the top plate auxiliary flow channel and the base plate auxiliary flow channel 13 are the same.

[0068] The base is provided with a limiting member 12, and the liquid changing tray 10 is provided with a limiting groove. The limiting member 12 and the limiting groove cooperate with each other and are used to limit the liquid changing tray 10. The housing 04 includes a cover 05 and a housing. The cover 05 is installed on the top of the housing, and the base is installed on the bottom of the housing. The drive motor 06 is installed on the housing. The base is provided with heat sink 03.

[0069] Specifically, after assembling the liquid exchanger 36, the inlet pipe is connected to an external liquid inlet device, and multiple outlet pipes are connected to an external liquid outlet device, which acts as a liquid exchange controller. The liquid exchange controller controls the drive motor to rotate, and the drive motor drives the liquid exchange top plate to rotate through the drive disc, which will switch the liquid exchange flow channel to the required inlet and outlet pipes. If it is necessary to replace other outlet pipes, the liquid exchange controller controls the drive motor to continue rotating, switching the liquid exchange flow channel to the inlet pipe and other outlet pipes for liquid exchange operation.

[0070] One method for operating a fluid changer includes the following steps:

[0071] Step 1: Fabrication of hydrophobic ceramic materials

[0072] Alumina powder was selected, and the liquid changing base plate and liquid changing top plate were respectively produced by high-temperature firing using corresponding molds with liquid changing base plate and liquid changing top plate;

[0073] Weigh 3-5 parts by weight of polymethylhydrosiloxane, 10-15 parts of polystyrene, 30-40 parts of alumina and 45-50 parts of chloroform. First, add polymethylhydrosiloxane to chloroform and stir for 10 minutes. Then, add alumina powder to the above solution and continue stirring for 1 hour. After it is stirred evenly, slowly add polystyrene to the mixture and stir for 30 minutes to prepare a hydrophobic coating mixture.

[0074] Add the hydrophobic coating mixture into the spraying machine, and use the spraying machine to evenly spray the hydrophobic coating mixture onto the surface of the liquid changing base plate and the liquid changing top plate. After the spraying is completed, place the liquid changing base plate and the liquid changing top plate in a drying oven at 100°C for 1 hour to prepare the hydrophobic liquid changing base plate and the hydrophobic liquid changing top plate.

[0075] Step Two: Fabrication of the Fluid Replacement Controller

[0076] Select an MCU circuit, an RS485 communication circuit, a power supply circuit, a power bus interface circuit, a current detection circuit, a button circuit, and a motor drive circuit. Connect the power output terminal of the power supply circuit to the power input terminals of the MCU circuit, RS485 communication circuit, power bus interface circuit, current detection circuit, button circuit, and motor drive circuit, respectively. Connect the motor control terminal of the motor drive circuit to the motor control terminal of the MCU circuit. Connect the communication terminal of the RS485 communication circuit to the communication terminal of the MCU circuit. Connect the interface terminal of the power bus interface circuit to the interface terminal of the MCU circuit. Connect the detection terminal of the current detection circuit to the detection terminal of the MCU circuit. Connect the button terminal of the button circuit to the button terminal of the MCU circuit to create a liquid changing controller.

[0077] Step 3: Assembly of the fluid exchanger

[0078] Based on steps one and two, select the base, container shell, inlet pipe, multiple outlet pipes, liquid exchange controller, drive motor, liquid exchange base plate, liquid exchange top plate, drive sealing ring, base plate sealing ring, and drive disc. Install the base on the bottom of the container shell, forming a container cavity with the base and container shell. Place the liquid exchange controller, drive motor, liquid exchange base plate, liquid exchange top plate, drive sealing ring, base plate sealing ring, and drive disc within the container cavity. Install the inlet pipe in the middle of the base, and install the multiple outlet pipes on the sides of the base. The inlet and outlet pipes pass through the liquid exchange base plate into the liquid exchange cavity. The liquid exchange top plate and liquid exchange base plate cooperate with each other. The liquid exchange base plate is installed on the base, the drive disc is installed on the drive end of the drive motor, the liquid exchange top plate is installed on the drive disc, and the drive motor is installed on the container shell. The drive motor is controlled... The control terminal of the liquid exchange controller is electrically connected. The liquid exchange chassis is equipped with a chassis auxiliary flow channel to drain excess liquid. The liquid exchange top plate is equipped with a top plate auxiliary flow channel and a liquid exchange flow channel. The liquid exchange flow channel is located in the middle of the top plate, and the top plate auxiliary flow channel is located at the edge of the top plate. The liquid exchange flow channel is used to connect or disconnect the inlet and outlet pipes. A limiting component is provided on the base, and a limiting groove is provided on the liquid exchange chassis. The limiting component and the limiting groove cooperate to limit the liquid exchange chassis. A drive sealing ring is provided at the drive plate to seal and prevent water from flowing into the drive motor. A chassis sealing ring is provided on the liquid exchange chassis to seal the connection between the inlet and outlet pipes and the liquid exchange chassis. Here, the liquid exchange chassis and liquid exchange top plate from step one are selected.

[0079] Step 4: Assembly of the liquid mixing system

[0080] Select the liquid exchanger from step three, then select the frame, venturi tube, inlet flow meter, outlet flow meter, controller, dispensing pipe, liquid exchanger, liquid exchange outlet pipe, main inlet pipe, main outlet pipe, and check valve. Select at least two dispensing pipes. The controller, dispensing pipe, liquid exchanger, and liquid exchange outlet pipe are respectively installed on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger. The outlet end of the dispensing pipe is connected to the inlet end of the liquid exchanger. The outlet end of the liquid exchanger is connected to the inlet end of the liquid exchange outlet pipe. The check valve is installed on the liquid exchange outlet pipe, and its opening direction is consistent with the liquid outlet direction. The outlet end of the liquid exchange outlet pipe is connected to one inlet end of the venturi tube. The other inlet end of the venturi tube is connected to the main inlet pipe via the inlet flow meter. The outlet end of the venturi tube is connected to the main outlet pipe via the outlet flow meter.

[0081] Experimental tests were conducted on the hydrophobic liquid exchange chassis and the liquid exchange top chassis. Figure 7 The image shows a SEM image of a hydrophobic coating. The SEM image shows that the coating on the surface is evenly distributed and there is a uniform distribution of nanowires. Figure 8The diagram shows the contact angle of the hydrophobic coating, which can be seen to reach 160°, indicating excellent hydrophobicity. Figure 9 The diagram shows the inlet and outlet flow rates with and without a hydrophobic coating. Here, the outlet diameter is smaller than the inlet diameter, and it can be seen that the outlet flow rate is higher with the hydrophobic coating.

[0082] Among them, see Figures 10-12 As shown, the fluid replacement controller includes a control circuit board, which comprises an MCU circuit, an RS485 communication circuit, a power supply circuit, a power bus interface circuit, a current detection circuit, a button circuit, and a motor drive circuit. The power output terminal of the power supply circuit is connected to the power input terminals of the MCU circuit, RS485 communication circuit, power bus interface circuit, current detection circuit, button circuit, and motor drive circuit, respectively. The motor control terminal of the motor drive circuit is connected to the motor control terminal of the MCU circuit. The communication terminal of the RS485 communication circuit is connected to the communication terminal of the MCU circuit. The interface terminal of the power bus interface circuit is connected to the interface terminal of the MCU circuit. The detection terminal of the current detection circuit is connected to the detection terminal of the MCU circuit. The button terminal of the button circuit is connected to the button terminal of the MCU circuit.

[0083] The power supply circuit includes a high-voltage circuit, a medium-voltage circuit, a low-voltage circuit, a voltage regulator circuit, a power supply AD circuit, and a power protection circuit. The power output terminal of the high-voltage circuit is connected to the power input terminal of the medium-voltage circuit and the power input terminal of the power supply AD circuit. The power output terminal of the medium-voltage circuit is connected to the power input terminal of the low-voltage circuit. The power output terminal of the low-voltage circuit is connected to the power input terminal of the voltage regulator circuit. The power output terminal of the voltage regulator circuit is connected to the power input terminal of the power protection circuit.

[0084] Among them, the high voltage circuit uses a 55V power supply, the medium voltage circuit uses a 24V power supply circuit, the low voltage circuit uses a 12V power supply circuit, and the power protection circuit uses an NTC circuit.

[0085] The voltage regulator circuit includes a voltage regulator chip N55, capacitors C47, C49, and C50, and an inductor L41. The "IN" terminal of the voltage regulator chip N55 is connected in parallel to capacitor C47 and a 12V DC power supply. The "OUT" terminal of the voltage regulator chip N55 is connected in parallel to capacitor C49 and inductor L41 and outputs a 5V DC power supply. The other end of inductor L41 is connected in parallel to capacitor C50 and the output terminal of a 3.3V DC power supply. The "GND" terminal of the voltage regulator chip N55, the other end of capacitor C47, the other end of capacitor C49, and the other end of capacitor C50 are all grounded.

[0086] The NTC circuit includes a thermistor RT40, a resistor R79, and a capacitor C53. The output terminal of the 3.3V DC power supply is connected to the resistor R79. The other end of the resistor R79 is connected in parallel to the thermistor RT40, the N44 "33" terminal of the chip, and the capacitor C53. The other end of the thermistor RT40 and the other end of the capacitor C53 are grounded together.

[0087] The RS485 communication circuit includes chip N57, resistors R70, R76, R77, R81, R82, capacitor C52, and ESD diode D40. Terminal "1" of chip N57 is connected to terminal "39" of chip N44 via resistor R7. Terminals "2" and "3" of chip N57 are connected to terminal "37" of chip N44. Terminal "4" of chip N57 is connected to terminal "38" of chip N44. Terminal "8" of chip N57 and capacitor C52 are connected to a 5V DC power supply. Terminal 7 of N57 is connected to terminal 7 of chip X11 through resistor R81. Terminal 6 of chip N57 is connected to terminal 8 of chip X11 through resistor R82. One end of resistor R77 is connected to terminal 7 of chip N57. One negative terminal of ESD diode D40 is connected to terminal 7 of chip X11, and the other negative terminal of ESD diode D40 is connected to terminal 8 of chip X11. The positive terminal of ESD diode D40 is grounded together with the other end of capacitor C52, the other end of resistor R77, and terminal 5 of chip N57.

[0088] The current detection circuit includes chip N13, resistor R25, capacitor C27, resistor R22, resistor R21, resistor R23, diode D16, and capacitor C29. Terminal 1 of chip N13 is grounded together with terminal 2 of chip N13 through resistor R22. Terminal 5 of chip N13 is connected to a 3.3V DC power supply together with capacitor C29. The other end of capacitor C29 is grounded. Terminal 4 of chip N13 is connected in parallel with resistor R25, capacitor C27, and terminal 32 of chip N44. The other end of resistor R25 and the other end of capacitor C27 are connected in parallel with terminal 3 of chip N13 and resistor R21. The other end of resistor R21 is connected together with the negative terminal of diode D16, resistor R23, and terminal 3 of chip X11. The positive terminal of diode D16 and the other end of resistor R23 are grounded together.

[0089] The 24V power supply circuit includes chip N11, resistors R11 and R17, capacitors C16 and R19, inductor L11, resistor R13, capacitors C11, C13, and C14, resistor R14, capacitor C18, capacitor C20, and diode D11. Terminal "1" of chip N11 is connected to capacitor C20. The other end of capacitor C20 is connected in parallel to terminal "6" of chip N11, one end of inductor L11, and the cathode of diode D11. Terminal "3" of chip N11 is connected in parallel to resistors R19 and R17, and capacitor C16. The other end of resistor R17... Connect resistor R11. The other end of resistor R11 is connected in parallel to the other end of capacitor C16, 24V DC power supply, capacitor C13, capacitor C14, and the other end of inductor L11. Terminal 5 of chip N11 is connected in parallel to 55V DC power supply, capacitor C11, and resistor R13. The other end of resistor R13 is connected in parallel to resistor R14, capacitor C18, and terminal 4 of chip N11. Terminal 2 of chip N11 is grounded together with the other ends of capacitor C11, capacitor C13, capacitor C14, resistor R14, capacitor C18, and the positive terminal of diode D11.

[0090] The 12V power supply circuit includes chip N12, resistors R12 and R18, capacitors C17 and R20, inductor L12, resistor R15, capacitors C12 and C15, resistor R16, capacitor C19, capacitor C21, and diode D12. Terminal "1" of chip N12 is connected to capacitor C21. The other end of capacitor C21 is connected in parallel to terminal "6" of chip N12, one end of inductor L12, and the cathode of diode D12. Terminal "3" of chip N12 is connected in parallel to resistors R20, R18, and capacitor C17. 18. The other end is connected to resistor R12. The other end of resistor R12 is connected in parallel to the other end of capacitor C17, 12V DC power supply, capacitor C15, and the other end of inductor L12. The "5" terminal of chip N12 is connected in parallel to 24V DC power supply, capacitor C12, and resistor R15. The other end of resistor R15 is connected in parallel to resistor R16, capacitor C19, and the "4" terminal of chip N11. The "2" terminal of chip N12, the other end of capacitor C12, the other end of capacitor C15, the other end of resistor R16, the other end of capacitor C19, and the positive terminal of diode D12 are all grounded.

[0091] The power bus interface circuit includes chip X11, diode D13, fuse FU11, and diode D14. Terminals "1" and "2" of chip X11 are connected to a 55V DC power supply. Terminal "4" of chip X11 is connected to terminal "3" of chip X11. Terminal "5" of chip X11 is connected to terminals "36" of chip N44. Terminal "6" of chip X11 is connected to the negative terminal of diode D13. The positive terminal of diode D13 is connected to one end of fuse FU11. The other end of fuse FU11 is connected in parallel to a 12V DC power supply and the negative terminal of diode D14. The positive terminal of diode D14 is grounded.

[0092] The control circuit board further includes a motor interface circuit, which includes a chip X13. Terminal "1" of chip X13 is connected to terminals "2" and "3" of chip N14. Terminal "3" of chip X13 is connected to terminals "34" and "35" of chip N14. Terminal "2" of chip X13 is connected to terminals "16" and "17" of chip N14. Terminal "4" of chip X13 is connected to terminals "20" and "21" of chip N14.

[0093] The button circuit includes interface X42, resistors R48, R57, R53, R58, R54, R59, R60, LED40, and LED41. Terminal "1" of interface X42 is connected to resistor R57. The other end of resistor R57 is connected in parallel to resistors R48, R58, and terminal "30" of chip N44. The other end of resistor R48 is connected to a 3.3V DC power supply. The other end of resistor R58 is connected to terminal "2" of interface X42. Terminal "3" of interface X42... The chip is connected to the N44 "35" terminal via resistor R53. The X42 "4" terminal is connected to the N44 "34" terminal via resistor R54. The N44 "35" terminal is connected to resistor R59. The other end of resistor R59 is connected to the positive terminal of LED40. The N44 "34" terminal is connected to resistor R60. The other end of resistor R60 is connected to the positive terminal of LED41. The X42 "5" terminal, the negative terminals of LED40 and LED41 are grounded together. This X42 interface will be connected to the button detection board.

[0094] The power supply AD circuit includes resistors R65, R66, R67 and C48. Resistor R65 is connected to a 55V DC power supply. The other end of resistor R65 is connected to resistor R66. The other end of resistor R66 is connected in parallel to the N44 "31" terminal, resistor R67 and capacitor C48. The other ends of resistor R67 and capacitor C48 are grounded together.

[0095] The MCU circuit includes capacitor C40, resistor R40, capacitor C41, resistor R44, capacitor C42, resistor R45, capacitor C43, capacitor C44, capacitor C45, capacitor C46, ​​inductor L40, and chip N44. Pin "14" of chip N44 is connected in parallel to one end of capacitor C45, one end of capacitor C46, ​​one end of inductor L40, and one end of capacitor C44. Pin "15" of chip N44 shares a common ground with the other ends of capacitors C45 and C46. Inductor L40... The other end of pin 40 is connected to a 3.3V DC power supply. Pin 28 of chip N44 is connected in parallel to one end of capacitor C44, one end of resistor R45, one end of resistor R40, one end of capacitor C41, one end of resistor R44, and pin 42 of chip N44. The other end of capacitor C44 is grounded. Pin 29 of chip N44 is grounded. Pin 36 of chip N44 is connected in parallel to the other end of resistor R45 and one end of capacitor C43. The other end of capacitor C43 is grounded. The other end of capacitor C41 is grounded. Pin "40" of chip N44 is connected in parallel to the other end of resistor R40 and one end of capacitor C40. The other end of capacitor C40 is grounded. Pin "43" of chip N44 is grounded. Pin "48" of chip N44 is connected in parallel to the other end of resistor R44 and one end of capacitor C42. The other end of capacitor C42 is grounded together with pin "49" of chip N44. Pin "1" of chip N44 is connected in parallel to terminal "4" of photoelectric switch I1 and one end of resistor R42. Pin "2" of chip N44 is connected in parallel to... The "4" terminal of photoelectric switch I2 and one end of resistor R45 are connected in parallel to the "3" pin of chip N44. The "4" terminal of photoelectric switch I3 and one end of resistor R49 are connected in parallel to the "20" pin of chip N44. The "4" terminal of photoelectric switch I4 and one end of resistor R56 are connected in parallel to the "21" pin of chip N44. The "4" terminal of photoelectric switch I5 and one end of resistor R62 are connected in parallel to the "25" pin of chip N44. The "4" terminal of photoelectric switch I6 and one end of resistor R64 are connected in parallel.

[0096] The motor drive circuit includes chip N14, resistor R32, capacitors C23, C33, C30, C31, C22, C23, C24, C25, C26, C28, diode D15, and resistor R24. Pin "1" of chip N14 is connected in parallel to pin "36" of chip N14, one end of resistor R32, one end of capacitor C32, and pin "30" of chip N14. The other end of resistor R32, the other end of capacitor C32, pin "31" of chip N14, and one end of capacitor C33 are grounded. The other end of capacitor C33 is connected to pin "29" of chip N14. Pin "25" of chip N14 is connected to pin "26" of chip N14 through capacitor C30. Pin "24" of chip N14... Connect one end of capacitor C31. The other end of capacitor C31 is connected to a 55V DC power supply along with pin "22" of chip N14. Pin "19" of chip N14 is connected in parallel to pin "18" and pin "12" of chip N14, one end of resistor R24, and one end of capacitor C28. Pin "13" of chip N14, the other end of capacitor C28, and the other end of resistor R24 ​​are grounded together. Pin "15" of chip N14, one end of capacitors C22, C23, C24, C25, and C26 connected in parallel, and the negative terminal of diode D15 are connected to a 55V DC power supply. The other end of capacitors C22, C23, C24, C25, and C26 connected in parallel and the positive terminal of diode D15 are grounded together. Diode D15 is selected as a Zener diode.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fluid exchanger, characterized in that, The liquid mixing system includes: a frame, a venturi tube, an inlet flow meter, an outlet flow meter, a controller, a distributor, a liquid exchanger, a liquid exchange outlet pipe, a main inlet pipe, a main outlet pipe, and a one-way valve. At least two distributor tubes are selected. The controller, distributor, liquid exchanger, and liquid exchange outlet pipe are respectively mounted on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger. The outlet end of the distributor tube is connected to the inlet end of the liquid exchanger. The outlet end of the liquid exchanger is connected to the inlet end of the liquid exchange outlet pipe. The one-way valve is mounted on the liquid exchange outlet pipe, and its opening direction is consistent with the liquid outlet direction. The outlet end of the liquid exchange outlet pipe is connected to one inlet end of the venturi tube. The other inlet end of the venturi tube is connected to the main inlet pipe via the inlet flow meter. The outlet end of the venturi tube is connected to the main outlet pipe via the outlet flow meter. The liquid changer includes: a base, a housing, an inlet pipe, an outlet pipe, a liquid changer controller, a drive motor, and a liquid changer mechanism. The base is installed on the bottom of the housing, and the base and housing form a cavity. The liquid changer controller, drive motor, and liquid changer mechanism are all disposed in the cavity. The inlet pipe and outlet pipe are both installed on the base. The outlet end of the inlet pipe is connected to the inlet end of the liquid changer mechanism, and the outlet end of the liquid changer mechanism is connected to the inlet end of the outlet pipe. The liquid changer mechanism is used to transfer the liquid from the inlet pipe to the outlet pipe. The liquid changer mechanism is installed on the drive end of the drive motor, and the drive motor is installed on the housing. The control end of the drive motor is electrically connected to the control end of the liquid changer controller. The fluid replacement controller includes a control circuit board, which comprises an MCU circuit, an RS485 communication circuit, a power supply circuit, a power bus interface circuit, a current detection circuit, a button circuit, and a motor drive circuit. The power output terminal of the power supply circuit is connected to the power input terminals of the MCU circuit, RS485 communication circuit, power bus interface circuit, current detection circuit, button circuit, and motor drive circuit, respectively. The motor control terminal of the motor drive circuit is connected to the motor control terminal of the MCU circuit. The communication terminal of the RS485 communication circuit is connected to the communication terminal of the MCU circuit. The interface terminal of the power bus interface circuit is connected to the interface terminal of the MCU circuit. The detection terminal of the current detection circuit is connected to the detection terminal of the MCU circuit. The button terminal of the button circuit is connected to the button terminal of the MCU circuit.

2. The fluid exchanger according to claim 1, characterized in that, The power supply circuit includes a high-voltage circuit, a medium-voltage circuit, a low-voltage circuit, a voltage regulator circuit, a power supply AD circuit, and a power protection circuit. The power output terminal of the high-voltage circuit is connected to the power input terminal of the medium-voltage circuit and the power input terminal of the power supply AD circuit, respectively. The power output terminal of the medium-voltage circuit is connected to the power input terminal of the low-voltage circuit. The power output terminal of the low-voltage circuit is connected to the power input terminal of the voltage regulator circuit. The power output terminal of the voltage regulator circuit is connected to the power input terminal of the power protection circuit.

3. The fluid exchanger according to claim 1, characterized in that, At least two liquid outlet pipes are selected, with the liquid inlet pipe installed in the middle of the base and the liquid outlet pipe installed on the side of the base.

4. A fluid exchanger according to claim 3, characterized in that, The liquid changing mechanism includes a liquid changing base, a liquid changing top plate, and a drive plate. The liquid changing base is mounted on the base, the drive plate is mounted on the drive end of the drive motor, and the liquid changing top plate is mounted on the drive plate. The liquid changing base and the liquid changing top plate form a liquid changing chamber and are used to change the liquid. The inlet pipe and the outlet pipe both pass through the liquid changing base into the liquid changing chamber.

5. A fluid exchanger according to claim 4, characterized in that, The liquid exchange chassis is equipped with a chassis auxiliary flow channel, which is used to drain excess liquid.

6. A fluid exchanger according to claim 4, characterized in that, The liquid exchange top plate is provided with a top plate auxiliary flow channel and a liquid exchange flow channel. The liquid exchange flow channel is located in the middle of the liquid exchange top plate, and the top plate auxiliary flow channel is located on the side of the liquid exchange top plate. The liquid exchange flow channel is used to connect or disconnect the inlet pipe and the outlet pipe.

7. A fluid exchanger according to claim 4, characterized in that, The fluid exchange chassis is made of hydrophobic ceramic material.

8. A fluid exchanger according to claim 4, characterized in that, The fluid exchange top plate is made of hydrophobic ceramic material.

9. A fluid exchanger according to claim 4, characterized in that, The base is provided with a limiting component, and the fluid changing chassis is provided with a limiting groove. The limiting component and the limiting groove cooperate with each other and are used to limit the fluid changing chassis.

10. A method for operating a fluid exchanger, characterized in that, The operation method steps are as follows: Step 1: Fabrication of hydrophobic ceramic materials Alumina powder was selected, and the liquid changing base plate and liquid changing top plate were respectively produced by high-temperature firing using corresponding molds with liquid changing base plate and liquid changing top plate; Weigh 3-5 parts by weight of polymethylhydrosiloxane, 10-15 parts of polystyrene, 30-40 parts of alumina and 45-50 parts of chloroform. First, add polymethylhydrosiloxane to chloroform and stir for 10 minutes. Then, add alumina powder to the above solution and continue stirring for 1 hour. After it is stirred evenly, slowly add polystyrene to the mixture and stir for 30 minutes to prepare a hydrophobic coating mixture. Add the hydrophobic coating mixture into the spraying machine, and use the spraying machine to evenly spray the hydrophobic coating mixture onto the surface of the liquid changing base plate and the liquid changing top plate. After the spraying is completed, place the liquid changing base plate and the liquid changing top plate in a drying oven at 100°C for 1 hour to prepare the hydrophobic liquid changing base plate and the hydrophobic liquid changing top plate. Step Two: Fabrication of the Fluid Replacement Controller Select an MCU circuit, an RS485 communication circuit, a power supply circuit, a power bus interface circuit, a current detection circuit, a button circuit, and a motor drive circuit. Connect the power output terminal of the power supply circuit to the power input terminals of the MCU circuit, RS485 communication circuit, power bus interface circuit, current detection circuit, button circuit, and motor drive circuit, respectively. Connect the motor control terminal of the motor drive circuit to the motor control terminal of the MCU circuit. Connect the communication terminal of the RS485 communication circuit to the communication terminal of the MCU circuit. Connect the interface terminal of the power bus interface circuit to the interface terminal of the MCU circuit. Connect the detection terminal of the current detection circuit to the detection terminal of the MCU circuit. Connect the button terminal of the button circuit to the button terminal of the MCU circuit to create a liquid changing controller. Step 3: Assembly of the fluid exchanger Based on steps one and two, select the base, container shell, inlet pipe, multiple outlet pipes, liquid exchange controller, drive motor, liquid exchange base plate, liquid exchange top plate, drive sealing ring, base plate sealing ring, and drive disc. Install the base on the bottom of the container shell, forming a container cavity with the base and container shell. Place the liquid exchange controller, drive motor, liquid exchange base plate, liquid exchange top plate, drive sealing ring, base plate sealing ring, and drive disc within the container cavity. Install the inlet pipe in the middle of the base, and install the multiple outlet pipes on the sides of the base. The inlet and outlet pipes pass through the liquid exchange base plate into the liquid exchange cavity. The liquid exchange top plate and liquid exchange base plate cooperate with each other. The liquid exchange base plate is installed on the base, the drive disc is installed on the drive end of the drive motor, the liquid exchange top plate is installed on the drive disc, and the drive motor is installed on the container shell. The drive motor is controlled... The control terminal of the liquid exchange controller is electrically connected. The liquid exchange chassis is equipped with a chassis auxiliary flow channel to drain excess liquid. The liquid exchange top plate is equipped with a top plate auxiliary flow channel and a liquid exchange flow channel. The liquid exchange flow channel is located in the middle of the top plate, and the top plate auxiliary flow channel is located at the edge of the top plate. The liquid exchange flow channel is used to connect or disconnect the inlet and outlet pipes. A limiting component is provided on the base, and a limiting groove is provided on the liquid exchange chassis. The limiting component and the limiting groove cooperate to limit the liquid exchange chassis. A drive sealing ring is provided at the drive plate to seal and prevent water from flowing into the drive motor. A chassis sealing ring is provided on the liquid exchange chassis to seal the connection between the inlet and outlet pipes and the liquid exchange chassis. Here, the liquid exchange chassis and liquid exchange top plate from step one are selected. Step 4: Assembly of the liquid mixing system Select the liquid exchanger from step three, then select the frame, venturi tube, inlet flow meter, outlet flow meter, controller, dispensing pipe, liquid exchanger, liquid exchange outlet pipe, main inlet pipe, main outlet pipe, and check valve. Select at least two dispensing pipes. The controller, dispensing pipe, liquid exchanger, and liquid exchange outlet pipe are respectively installed on the frame. The control terminal of the controller is electrically connected to the control terminal of the liquid exchanger. The outlet end of the dispensing pipe is connected to the inlet end of the liquid exchanger. The outlet end of the liquid exchanger is connected to the inlet end of the liquid exchange outlet pipe. The check valve is installed on the liquid exchange outlet pipe, and its opening direction is consistent with the liquid outlet direction. The outlet end of the liquid exchange outlet pipe is connected to one inlet end of the venturi tube. The other inlet end of the venturi tube is connected to the main inlet pipe via the inlet flow meter. The outlet end of the venturi tube is connected to the main outlet pipe via the outlet flow meter.

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