Controller of constant-pressure water supply frequency converter

Abstract

The utility model provides a controller of a constant pressure water supply frequency converter, a circuit board is arranged in a housing, control buttons are distributed on the front surface of the housing, the front surface of the housing is provided with a first through hole, and a display screen is assembled on the housing through the first through hole; the external interface is arranged on the back of the shell; the data transmission end of the circuit board is connected with the data transmission end of the constant-pressure water supply frequency converter through the external interface; the control button sends a received control signal to the circuit board, and the circuit board sends an adjusting instruction for adjusting parameters to the constant-pressure water supply frequency converter according to the control signal; compared with the prior art, the constant-pressure water supply frequency converter is subjected to parameter debugging by arranging the one-button control button, and the set pressure, the feedback pressure and the operation frequency of the constant-pressure water supply frequency converter can be visually seen on the display screen; the problems that system parameter debugging of the water supply frequency converter is complex, and the running state and system parameters of the water supply frequency converter cannot be visually displayed are solved.

Description

Technical Field

[0001] This utility model relates to the field of water supply frequency converter control technology, and in particular to a controller for a constant pressure water supply frequency converter. Background Technology

[0002] The safe, reliable, and stable operation of urban residential and factory water supply systems is receiving increasing attention and importance from all sectors of society. Traditional water supply systems rely on valve adjustments to control water consumption. This requires manual adjustment by on-duty personnel based on experience, making it difficult to achieve timely water supply. Water pressure is insufficient during peak usage periods and excessively high during off-peak periods, resulting in significant water waste and potential safety hazards, particularly the risk of pipe bursts due to excessive pressure. Due to these shortcomings, water supply frequency converters have been rapidly and widely adopted in urban housing and factories. These converters can flexibly and automatically adjust pump flow and the number of pumps based on water pipe pressure and the set parameters of the water supply system, solving not only the problem of safe and reliable operation of the water supply system but also the problem of resource waste.

[0003] However, most inverter companies currently provide users with a generic keyboard for debugging water supply inverters. This generic keyboard requires setting the function parameter group of the water supply inverter to see the set pressure and feedback pressure. The system parameter debugging steps are too cumbersome, and users do not know how to accurately debug the system parameters of the water supply inverter, resulting in a poor user experience. Furthermore, it cannot intuitively display the operating status and system parameters of the water supply inverter. At the same time, when encountering users who do not know how to debug the parameters, the manufacturer needs to communicate by phone or go to the site to help with the parameter debugging, which also increases the company's labor and time costs. Utility Model Content

[0004] This utility model provides a controller for a constant pressure water supply frequency converter, which aims to solve the problems of complex system parameter debugging of water supply frequency converters and the inability to intuitively display the operating status and system parameters of the water supply frequency converter.

[0005] To achieve the above objectives, this utility model provides a controller for a constant pressure water supply frequency converter, including a housing, a circuit board, a display screen, an external interface, and control buttons;

[0006] The circuit board is placed inside the housing, and the control buttons are distributed on the front of the housing. The front of the housing has a first through hole, and the display screen is mounted on the housing through the first through hole.

[0007] The external interface is located on the back of the casing, and the data transmission terminal of the circuit board is connected to the data transmission terminal of the constant pressure water supply frequency converter through the external interface;

[0008] The control button sends the received control signal to the circuit board, and the circuit board sends adjustment instructions for adjusting parameters to the constant pressure water supply frequency converter according to the control signal.

[0009] Furthermore, the circuit board contains a control unit, a storage unit, a display unit, and a water pressure detection unit.

[0010] The control buttons are electrically connected to the input terminal of the control unit, the output terminal of the control unit is electrically connected to the input terminal of the display unit, the output terminal of the storage unit and the output terminal of the water pressure detection unit are both electrically connected to the input terminal of the control unit, the input terminal of the water pressure detection unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through an external interface, the input terminal of the control unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through an external interface, the data transmission terminal of the control unit is electrically connected to the data transmission terminal of the constant pressure water supply frequency converter through an external interface, and the display unit is located in a position corresponding to the display screen.

[0011] Furthermore, the control buttons protrude from the housing and include: an increase button, a decrease button, a run button, a shift button, a stop button, a reset button, a confirm button, a menu button, an exit button, and a factory reset button;

[0012] The Add button, Decrease button, Run button, Shift button, Stop button, Reset button, Confirm button, Menu button, Exit button, and Factory Reset button are all electrically connected to the input terminal of the control unit via wires.

[0013] Furthermore, it also includes a button operation film, which is applied to the front of the casing, excluding the display screen.

[0014] The preferred embodiment is a 5-digit dual-row LED digital tube, wherein the first row of LED digital tubes is used to display the set pressure and feedback pressure, and the second row of LED digital tubes is used to display the operating frequency.

[0015] The preferred option is a liquid crystal display (LCD) screen.

[0016] Furthermore, the circuit board also includes indicator lights, which include:

[0017] Operation indicator light, stop indicator light, pump linkage indicator light, alarm indicator light, frequency indicator light, current indicator light;

[0018] The input terminals of the operation indicator, stop indicator, pump indicator, alarm indicator, frequency indicator, and current indicator are all electrically connected to the output terminal of the control unit.

[0019] Preferably, the outer casing is further provided with a second through hole, a third through hole, a fourth through hole, a fifth through hole, a sixth through hole, and a seventh through hole, all of which are smaller than the first through hole;

[0020] The second, third, and fourth through holes are all located on one side of the first through hole, while the fifth, sixth, and seventh through holes are all located on the other side of the first through hole.

[0021] The second through hole corresponds to the position of the frequency indicator light, the third through hole corresponds to the position of the current indicator light, the fourth through hole corresponds to the position of the alarm indicator light, the fifth through hole corresponds to the position of the running indicator light, the sixth through hole corresponds to the position of the stop indicator light, and the seventh through hole corresponds to the position of the combined pump indicator light.

[0022] The above-mentioned solution of this utility model has the following beneficial effects:

[0023] This utility model includes a housing, a circuit board, a display screen, an external interface, and control buttons. The circuit board is located inside the housing, and the control buttons are distributed on the front of the housing. A first through hole is provided on the front of the housing, and the display screen is mounted on the housing through the first through hole. The external interface is located on the back of the housing, and the data transmission end of the circuit board is connected to the data transmission end of the constant pressure water supply frequency converter through the external interface. The control buttons send received control signals to the circuit board, and the circuit board sends adjustment instructions for adjusting parameters to the constant pressure water supply frequency converter according to the control signals. Compared with the prior art, this utility model uses a one-button control to adjust the parameters of the constant pressure water supply frequency converter, and the set pressure, feedback pressure, and operating frequency of the constant pressure water supply frequency converter can be intuitively displayed on the display screen. This solves the problems of complex parameter adjustment of water supply frequency converter systems and the inability to intuitively display the operating status and system parameters of the water supply frequency converter.

[0024] Other beneficial effects of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0025] Figure 1 This is a cross-sectional structural diagram of an embodiment of the present utility model;

[0026] Figure 2 This is a circuit diagram of the water pressure detection unit in an embodiment of this utility model;

[0027] Figure 3 This is a front view of Embodiment 1 of this utility model;

[0028] Figure 4 This is a front view of Embodiment 2 of this utility model;

[0029] The attached figures are labeled as follows:

[0030] 1 - Outer casing 2 - Circuit board 3 - Display screen

[0031] 4 - Control button; 5 - External interface; 6 - Button operation membrane. Detailed Implementation

[0032] To make the technical problems, solutions, and advantages of this utility model clearer, a detailed description will be provided below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] Example 1

[0035] like Figure 1 As shown, this embodiment 1 provides a controller for a constant pressure water supply frequency converter, including a housing 1, a circuit board 2, a display screen 3, and control buttons 4. The circuit board 2 is placed inside the housing 1, and the control buttons 4 are distributed on the front of the housing 1. The front of the housing 1 is provided with a first through hole, and the display screen 3 is mounted on the housing 1 through the first through hole.

[0036] External interface 5 is located on the back of housing 1, and the data transmission end of circuit board 2 is connected to the data transmission end of constant pressure water supply frequency converter through external interface 5.

[0037] Control button 4 sends the received control signal to circuit board 2, and circuit board 2 sends adjustment instructions for adjusting parameters to constant pressure water supply frequency converter according to the control signal.

[0038] Specifically, circuit board 2 is equipped with a control unit, a storage unit, a display unit, and a water pressure detection unit;

[0039] The control button is electrically connected to the input terminal of the control unit and is used to send received control signals to circuit board 2. The output terminal of the control unit is electrically connected to the input terminal of the display unit and is used to visualize the set parameters through the display unit. The output terminals of the storage unit and the water pressure detection unit are both electrically connected to the input terminal of the control unit and are used to retrieve the required program from the storage unit and read the feedback pressure value from the water pressure detection unit. The input terminal of the indicator light is electrically connected to the output terminal of the control unit and is used to send control commands to control the indicator light to turn on or off. The input terminal of the water pressure detection unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through an external interface and is used to sample the feedback pressure of the water pump in the constant pressure water supply frequency converter. The input terminal of the control unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through an external interface 5 and is used to connect the power supply. The data transmission terminal of the control unit is electrically connected to the data transmission terminal of the constant pressure water supply frequency converter through an external interface 5 and is used to send adjustment commands to the constant pressure water supply frequency converter through the external interface. The parameters of the constant pressure water supply frequency converter are adjusted and the adjustment results are fed back to the constant pressure water supply frequency converter through an external interface. The display unit is set in the position corresponding to the display screen 3.

[0040] Preferably, in embodiment 1, the circuit board can be a single-sided printed circuit board or a double-sided printed circuit board. The control unit arranged on the circuit board can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0041] Preferably, the storage unit is a memory, which can be an internal storage unit of the pressure regulating control device, such as a hard disk or memory inside the pressure regulating control device, or an external storage unit of the pressure regulating control device, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the pressure regulating control device; it can also include both internal storage units and external storage devices; the memory is used to store the operating system, application programs, bootloader, data and other programs, such as the program code of the macro program of the constant pressure water supply frequency converter.

[0042] Specifically, in Embodiment 1, the water pressure detection unit includes a pressure sensor J1, a first resistor R1 with a resistance of 100Ω, a second resistor R2 with a resistance of 6.8kΩ, a third resistor R3 with a resistance of 100kΩ, a fourth resistor R4 with a resistance of 100kΩ, a fifth resistor R5 with a resistance of 3.3kΩ, a sixth resistor R6 with a resistance of 39.2kΩ, a seventh resistor R7 with a resistance of 2kΩ, an eighth resistor R8 with a resistance of 2kΩ, a ninth resistor R9 with a resistance of 2kΩ, a tenth resistor R10 with a resistance of 2kΩ, a first capacitor C1 with a specification of 0.1uF / 200V, and a capacitor with a specification of 0.1uF / 200V. The second capacitor C2, the first switching diode D1 (MMBD7000LT1), the second switching diode D2 (MMBD7000LT1), and the operational amplifier (LM324) are all connected. The first terminal of the pressure sensor J1 is connected to the first terminal of the second capacitor C2, the first terminal of the fourth resistor R4, the first terminal of the seventh resistor R7, and the first terminal of the third resistor R3. The second terminals of the pressure sensor J1, the second terminal of the second capacitor C2, and the second terminal of the fourth resistor R4 are all grounded. The second terminal of the seventh resistor R7 is connected to the first terminal of the sixth resistor R6. The sixth resistor R6... The second terminal is connected to the second terminals of the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10, respectively, and grounded. The first terminal of the seventh resistor R7 is connected to the first terminals of the tenth resistor R10, the ninth resistor R9, and the eighth resistor R8, respectively. The second terminal of the third resistor R3 is connected to the first terminal of the first capacitor C1, the third terminal of the first switching diode D1, and the third terminal of the operational amplifier U1A, respectively. The first terminal of the first switching diode D1 is connected to the -15V power supply, and the second terminal of the first switching diode D1 is connected to the +15V power supply. The third terminal of the operational amplifier U1A... The second terminal is connected to the first terminal of the first resistor R1. The second terminal of the first resistor R1 is connected to the first terminal of the operational amplifier U1A and the first terminal of the second resistor R2. The second terminal of the second resistor R2 is connected to the first terminal of the fifth resistor R5, the third terminal of the second switching diode D2, and the input terminal of the controller. The second terminal of the fifth resistor R5 and the first terminal of the second switching diode D2 are both grounded. The second terminal of the second switching diode D2 is connected to +3.3V. The second resistor R2 and the fourth resistor R5 are used to adjust and change the output voltage of the pressure sensor to meet the controller's requirements for the input level.

[0043] Preferably, the display unit is a 5-digit dual-row LED digital tube, wherein the first row of LED digital tubes is used to display the set pressure and feedback pressure, the first two digits of the first row of LED digital tubes represent the set pressure of the constant pressure water supply frequency converter, and the last three digits represent the feedback pressure of the constant pressure water supply frequency converter; the second row of LED digital tubes is used to display the operating frequency.

[0044] Preferably, the control button 4 protrudes from the housing 1. The control button 4 includes: an increase button, a decrease button, a run button, a shift button, a stop button, a reset button, a confirm button, a menu button, an exit button, and a factory reset button for setting parameters to increase, decrease, run, shift, stop, reset, confirm, menu, exit, and restore factory settings. Figure 3 As shown;

[0045] The add button, reduce button, run button, shift button, stop button, reset button, confirm button, menu button, exit button, and factory reset button are all connected to the input terminal of the control unit via wires. They are used to send parameter adjustment commands corresponding to the function of the control button to the control unit, so as to facilitate one-button operation of the constant pressure water supply frequency converter by the pressure regulating control device.

[0046] Specifically, it also includes a button operation film 6, which is affixed to the front of the housing 1 except for the display screen 3. The button operation film 6 has the words "△", "▽", "Run", "Shift", "Stop", "Reset", "Confirm", "Menu", "Exit" and "Restore Factory" printed on the position corresponding to the control button 4. This not only makes it easy for users to understand the function of the control button 4, but also serves to prevent dust, water and oil stains.

[0047] Specifically, the circuit board also has indicator lights, including:

[0048] Operating indicator light, stop indicator light, pump linkage indicator light, alarm indicator light, frequency indicator light, current indicator light, voltage indicator light;

[0049] The input terminals of the operation indicator, stop indicator, pump indicator, alarm indicator, frequency indicator, current indicator, and voltage indicator are all connected to the output terminal of the control unit.

[0050] The button operation membrane 6 has the words "Run", "Stop", "Pump", "Alarm", "Frequency", and "Current" printed on it in the positions corresponding to the run indicator, stop indicator, pump indicator, alarm indicator, frequency indicator, current indicator, and voltage indicator, so that users can clearly see the meaning represented when the indicator lights are lit.

[0051] Specifically, the outer casing is also provided with a second through hole, a third through hole, a fourth through hole, a fifth through hole, a sixth through hole, and a seventh through hole, all of which are smaller than the first through hole;

[0052] The second, third, and fourth through holes are all located on one side of the first through hole, while the fifth, sixth, and seventh through holes are all located on the other side of the first through hole.

[0053] The second through hole corresponds to the position of the frequency indicator light, the third through hole corresponds to the position of the current indicator light, the fourth through hole corresponds to the position of the alarm indicator light, the fifth through hole corresponds to the position of the running indicator light, the sixth through hole corresponds to the position of the stop indicator light, and the seventh through hole corresponds to the position of the combined pump indicator light.

[0054] The instructions for use of Example 1 are as follows:

[0055] When a three-phase 380V power supply is connected to the R, S, and T three-phase input terminals of the constant pressure water supply frequency converter to power it on, the display screen of this embodiment shows a frequency of 50Hz and flashes intermittently, indicating that this embodiment is using a general frequency converter program. To adjust to a constant pressure water supply macro program, press the menu / exit button to select the menu, and then the display screen will show A0, which represents the parameter group. When A0 appears, press the increase button continuously until F0 is displayed on the screen. F0 indicates that it has been set to the constant pressure water supply frequency converter macro program. Then press the confirmation button to confirm, and the display screen will show "F0-00". Press the confirmation button again, and the display screen will show "00". Then press the increase button continuously until "11" is displayed on the screen. Press the confirmation button to confirm, and then press the menu / exit button continuously to exit the program setting. The constant pressure water supply frequency converter macro program setting is now complete. At this time, the display screen shows the set pressure, feedback pressure, and operating frequency of the constant pressure water supply frequency converter. If the user messes up the parameters and cannot get them right, they can restore the factory settings by pressing and holding the factory reset button for more than 3 seconds and then readjust the settings. If the user needs to check the operating current and frequency of the constant pressure water supply inverter, they only need to press the shift button continuously until both the current indicator and the frequency indicator light are lit. The display screen will show the operating current and operating frequency of the constant pressure water supply inverter. When the water pressure detection unit detects that the feedback pressure value of the pressure gauge is greater than the set pressure value, the control unit will control the alarm indicator light to light up.

[0056] It should be noted that the following is an explanation of this utility model embodiment:

[0057] The set pressure is the pressure preset by the user based on the water consumption at different times, and the pressure at which the equipment works or goes into hibernation at any time.

[0058] Feedback pressure is the pressure value fed back by the water pump pressure gauge based on the water flow rate;

[0059] The operation indicator light illuminates when the user presses the run button, indicating that the device is in operation.

[0060] The stop indicator light illuminates when the user presses the stop button, indicating that the device is in a stopped state.

[0061] The pump connection indicator light is used when a user connects multiple constant pressure water supply frequency converters together via the 485 communication function. When the pump connection indicator light is on, it means that the pump connection is successful.

[0062] The alarm indicator light is used to illuminate when the constant pressure water supply frequency converter malfunctions or when there is a problem with the water pump or pressure gauge, so as to facilitate timely response and troubleshooting.

[0063] The frequency indicator light is used to display the current operating frequency of the constant pressure water supply inverter on the screen when the user presses the shift button;

[0064] The current indicator light is used to display the current generated when the user presses the shift button and switches to the current constant pressure water supply frequency converter to drive the water pump.

[0065] Example 2

[0066] like Figure 4 As shown, Embodiment 2 provides a controller for a constant pressure water supply frequency converter, including a housing 1, a circuit board 2, a display screen 3, and control buttons 4. The circuit board 2 is placed inside the housing 1, and the control buttons 4 are distributed on the front of the housing 1. The front of the housing 1 is provided with a first through hole, and the display screen 3 is mounted on the housing 1 through the first through hole.

[0067] External interface 5 is located on the back of housing 1, and the data transmission end of circuit board 2 is connected to the data transmission end of constant pressure water supply frequency converter through external interface 5.

[0068] Control button 4 sends the received control signal to circuit board 2, and circuit board 2 sends adjustment instructions for adjusting parameters to constant pressure water supply frequency converter according to the control signal.

[0069] Specifically, circuit board 2 is equipped with a control unit, a storage unit, a display unit, and a water pressure detection unit;

[0070] The control button is electrically connected to the input terminal of the control unit and is used to send received control signals to circuit board 2. The output terminal of the control unit is electrically connected to the input terminal of the display unit and is used to visualize the set parameters through the display unit. The output terminals of the storage unit and the water pressure detection unit are both electrically connected to the input terminal of the control unit and are used to retrieve the required program from the storage unit and read the feedback pressure value from the water pressure detection unit. The input terminal of the indicator light is electrically connected to the output terminal of the control unit and is used to send control commands to control the indicator light to turn on or off. The input terminal of the water pressure detection unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through an external interface and is used to sample the feedback pressure of the water pump in the constant pressure water supply frequency converter. The input terminal of the control unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through an external interface 5 and is used to connect the power supply. The data transmission terminal of the control unit is electrically connected to the data transmission terminal of the constant pressure water supply frequency converter through an external interface 5 and is used to send adjustment commands to the constant pressure water supply frequency converter through the external interface. The parameters of the constant pressure water supply frequency converter are adjusted and the adjustment results are fed back to the constant pressure water supply frequency converter through an external interface. The display unit is set in the position corresponding to the display screen 3.

[0071] Preferably, in embodiment 2, the circuit board can be a single-sided printed circuit board or a double-sided printed circuit board. The control unit arranged on the circuit board can be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.

[0072] Preferably, the storage unit is a memory, which can be an internal storage unit of the pressure regulating control device, such as a hard disk or memory inside the pressure regulating control device, or an external storage unit of the pressure regulating control device, such as a plug-in hard disk, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the pressure regulating control device; it can also include both internal storage units and external storage devices; the memory is used to store the operating system, application programs, bootloader, data and other programs, such as the program code of the macro program of the constant pressure water supply frequency converter.

[0073] Specifically, in Embodiment 2, the water pressure detection unit includes a pressure sensor J1, a first resistor R1 with a resistance of 100Ω, a second resistor R2 with a resistance of 6.8kΩ, a third resistor R3 with a resistance of 100kΩ, a fourth resistor R4 with a resistance of 100kΩ, a fifth resistor R5 with a resistance of 3.3kΩ, a sixth resistor R6 with a resistance of 39.2kΩ, a seventh resistor R7 with a resistance of 2kΩ, an eighth resistor R8 with a resistance of 2kΩ, a ninth resistor R9 with a resistance of 2kΩ, a tenth resistor R10 with a resistance of 2kΩ, a first capacitor C1 with a specification of 0.1uF / 200V, and a capacitor with a specification of 0.1uF / 200V. The second capacitor C2, the first switching diode D1 (MMBD7000LT1), the second switching diode D2 (MMBD7000LT1), and the operational amplifier (LM324) are all connected. The first terminal of the pressure sensor J1 is connected to the first terminal of the second capacitor C2, the first terminal of the fourth resistor R4, the first terminal of the seventh resistor R7, and the first terminal of the third resistor R3. The second terminals of the pressure sensor J1, the second terminal of the second capacitor C2, and the second terminal of the fourth resistor R4 are all grounded. The second terminal of the seventh resistor R7 is connected to the first terminal of the sixth resistor R6. The sixth resistor R6... The second terminal is connected to the second terminals of the eighth resistor R8, the ninth resistor R9, and the tenth resistor R10, respectively, and grounded. The first terminal of the seventh resistor R7 is connected to the first terminals of the tenth resistor R10, the ninth resistor R9, and the eighth resistor R8, respectively. The second terminal of the third resistor R3 is connected to the first terminal of the first capacitor C1, the third terminal of the first switching diode D1, and the third terminal of the operational amplifier U1A, respectively. The first terminal of the first switching diode D1 is connected to the -15V power supply, and the second terminal of the first switching diode D1 is connected to the +15V power supply. The third terminal of the operational amplifier U1A... The second terminal is connected to the first terminal of the first resistor R1. The second terminal of the first resistor R1 is connected to the first terminal of the operational amplifier U1A and the first terminal of the second resistor R2. The second terminal of the second resistor R2 is connected to the first terminal of the fifth resistor R5, the third terminal of the second switching diode D2, and the input terminal of the controller. The second terminal of the fifth resistor R5 and the first terminal of the second switching diode D2 are both grounded. The second terminal of the second switching diode D2 is connected to +3.3V. The second resistor R2 and the fourth resistor R5 are used to adjust and change the output voltage of the pressure sensor to meet the controller's requirements for the input level.

[0074] Specifically, in embodiment 2, the display unit is an LCD screen, which displays debugging parameters such as control status, set pressure, feedback pressure, and operating frequency.

[0075] Specifically, such as Figure 3As shown, control button 4 includes: a "△" button, a "▽" button, a "RUN" button, a "SHIFT" button, a "STOP" button, a "RESET" button, an "ENTER" button, a "PRG" button, an "ESC" button, a "Quick" button, and a "JOG" button for setting parameter increase, parameter decrease, run, shift, stop, reset, confirm, menu, exit, and custom functions;

[0076] The "△" button, "▽" button, "RUN" button, "SHIFT" button, "STOP" button, "RESET" button, "ENTER" button, "PRG" button, "ESC" button, "Quick" button, and "JOG" button are all connected to the input terminal of the control unit via wires. They are used to send parameter adjustment commands corresponding to the function of the control buttons to the control unit, so as to facilitate one-button operation of the constant pressure water supply frequency converter by the pressure regulating control device.

[0077] Specifically, it also includes a button operation film 6, which is affixed to the front of the housing 1 except for the display screen 3. The button operation film 6 is printed with the words "△", "▽", "RUN", "SHIFT", "STOP", "RESET", "ENTER", "PRG", "ESC", "Quick" and "JOG" at the positions corresponding to the control buttons 4. This not only makes it easy for users to understand the function of the control buttons 4, but also serves to prevent dust, water and oil stains.

[0078] Preferably, for ease of assembly, both Embodiment 1 and Embodiment 2 of this utility model have grooves on the waist of both sides of the outer shell 1, and the controllers provided in Embodiment 1 and Embodiment 2 are both installed on the surface of the control box of the constant pressure water supply frequency converter by snap-fit.

[0079] In this embodiment of the utility model, the external interface is a waterproof crystal head type network cable interface, model RJ45.

[0080] This utility model embodiment includes a housing, a circuit board, a display screen, an external interface, and control buttons. The circuit board is placed inside the housing, and the control buttons are distributed on the front of the housing. A first through hole is provided on the front of the housing, and the display screen is mounted on the housing through the first through hole. The external interface is located on the back of the housing, and the data transmission end of the circuit board is connected to the data transmission end of the constant pressure water supply frequency converter through the external interface. The control buttons send received control signals to the circuit board, and the circuit board sends adjustment instructions for adjusting parameters to the constant pressure water supply frequency converter according to the control signals. Compared with the prior art, this utility model embodiment uses a one-button control to adjust the parameters of the constant pressure water supply frequency converter, and the set pressure, feedback pressure, and operating frequency of the constant pressure water supply frequency converter can be intuitively displayed on the display screen. This solves the problems of complex parameter adjustment of water supply frequency converter systems and the inability to intuitively display the operating status and system parameters of the water supply frequency converter.

[0081] The above description is the preferred embodiment of this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of this utility model, and these improvements and modifications should also be considered within the protection scope of this utility model.

Claims

1. A controller for a constant pressure water supply frequency converter, characterized in that, Includes the casing, circuit board, display screen, external interfaces, and control buttons; The circuit board is placed inside the housing, the control buttons are distributed on the front of the housing, the front of the housing has a first through hole, and the display screen is mounted on the housing through the first through hole; The external interface is located on the back of the housing, and the data transmission terminal of the circuit board is connected to the data transmission terminal of the constant pressure water supply frequency converter through the external interface; The control button sends a received control signal to the circuit board, and the circuit board sends an adjustment command for adjusting parameters to the constant pressure water supply frequency converter according to the control signal.

2. The controller of the constant pressure water supply frequency converter according to claim 1, characterized in that, The circuit board is equipped with a control unit, a storage unit, a display unit, and a water pressure detection unit. The control button is electrically connected to the input terminal of the control unit, the output terminal of the control unit is electrically connected to the input terminal of the display unit, the output terminal of the storage unit and the output terminal of the water pressure detection unit are both electrically connected to the input terminal of the control unit, the input terminal of the water pressure detection unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through the external interface, the input terminal of the control unit is electrically connected to the output terminal of the constant pressure water supply frequency converter through the external interface, the data transmission terminal of the control unit is electrically connected to the data transmission terminal of the constant pressure water supply frequency converter through the external interface, and the display unit is located at a position corresponding to the display screen.

3. The controller of the constant pressure water supply frequency converter according to claim 2, characterized in that, The control buttons protrude from the housing and include: an increase button, a decrease button, a run button, a shift button, a stop button, a reset button, a confirm button, a menu button, an exit button, and a factory reset button. The increase button, decrease button, run button, shift button, stop button, reset button, confirm button, menu button, exit button, and factory reset button are all electrically connected to the input terminal of the control unit via wires.

4. The controller of the constant pressure water supply frequency converter according to claim 1, characterized in that, It also includes a button operation film, which is affixed to the front of the housing, excluding the display screen.

5. The controller of the constant pressure water supply frequency converter according to claim 2, characterized in that, The display unit is a 5-digit dual-row LED digital tube, wherein the first row of LED digital tubes is used to display the set pressure and feedback pressure, and the second row of LED digital tubes is used to display the operating frequency.

6. The controller of the constant pressure water supply frequency converter according to claim 2, characterized in that, The display unit is an LCD screen.

7. The controller of the constant pressure water supply frequency converter according to claim 2, characterized in that, The circuit board is also equipped with indicator lights, which include: Operation indicator light, stop indicator light, pump linkage indicator light, alarm indicator light, frequency indicator light, current indicator light; The input terminals of the running indicator, the stop indicator, the pump indicator, the alarm indicator, the frequency indicator, and the current indicator are all electrically connected to the output terminal of the control unit.

8. The controller of the constant pressure water supply frequency converter according to claim 7, characterized in that, The outer casing is also provided with a second through hole, a third through hole, a fourth through hole, a fifth through hole, a sixth through hole, and a seventh through hole, all of which are smaller than the first through hole; The second through hole, the third through hole, and the fourth through hole are all disposed on one side of the first through hole, and the fifth through hole, the sixth through hole, and the seventh through hole are all disposed on the other side of the first through hole; The second through hole corresponds to the position of the frequency indicator light, the third through hole corresponds to the position of the current indicator light, the fourth through hole corresponds to the position of the alarm indicator light, the fifth through hole corresponds to the position of the running indicator light, the sixth through hole corresponds to the position of the stop indicator light, and the seventh through hole corresponds to the position of the pump indicator light.

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