Driving control system of centrifugal water pump

Abstract

The utility model provides a drive control system of a centrifugal water pump, comprising: a power supply module for receiving an external power supply signal; the power supply end of the main control module is electrically connected with the power supply module, and the power supply module is used for supplying power to the main control module; the driving module is electrically connected with the power supply module and the main control module; the state detection and display module is electrically connected with the main control module; the water pump is electrically connected with the driving module and the state detection module, the driving module is used for driving the water pump to work, and the state detection and display module is used for detecting and displaying the running state of the water pump in real time. In the system, the main control module communicates with the driving module, the driving module drives the water pump to operate in real time, and quick response of water pump control can be achieved; in the whole machine operation process, the water pump can detect the phase current of the water pump and the current of the power supply bus in real time through the state detection module, and the working operation state of the water pump is judged by processing data collected by the state detection module.

Description

Technical Field

[0001] This application relates to the field of water pump control, and more particularly, to a drive control system for a centrifugal water pump. Background Art

[0002] In the field of household appliances, the centrifugal water pump is one of the most common water pumping components, and its drive control method is crucial for improving water pumping efficiency, reducing energy consumption, and increasing system stability. Due to differences in the usage habits and working conditions of the whole machine, etc., under some harsh working conditions, it is necessary for the water pump to be able to operate stably and have the ability to self-detect and identify the operating conditions. When the water pump is in an abnormal working condition, the water pump needs to have an active protection function to improve the operating reliability of the whole machine.

[0003] However, the traditional drive control method is single, there is only one drive control module and it cannot be integrated inside the water pump. The operating state of the water pump during operation cannot be detected, which has certain limitations. The water pumping efficiency of the water pump is low. During operation, it mainly relies on other detection components of the whole machine to detect the operating conditions of the water pump. When the water pump is working abnormally, it only relies on the protection function of the whole machine to act. The protection is unreliable and there is a certain lag, resulting in unstable operation of the water pump and affecting the user experience. Summary of the Utility Model

[0004] The main purpose of this application is to provide a drive control system for a centrifugal water pump to solve the problems in the prior art that the drive control method of the centrifugal water pump is single, the operating state of the water pump during operation cannot be detected, and there is a certain lag, resulting in unstable operation of the water pump and affecting the user experience.

[0005] To achieve the above object, according to one aspect of this application, there is provided a drive control system for a centrifugal water pump, including: a power supply module for receiving an external power supply signal; a main control module, the power supply terminal of the main control module is electrically connected to the power supply module, and the power supply module is used to supply power to the main control module; a drive module, the drive module is electrically connected to the power supply module and the main control module respectively; a state detection and display module, the state detection and display module is electrically connected to the main control module; a water pump, the water pump is electrically connected to the drive module and the state detection and display module respectively, the drive module is used to drive the water pump to work, and the state detection and display module is used to detect and display the operating state of the water pump in real time.

[0006] Further, the power supply module includes a first power supply sub-module and a second power supply sub-module. The first power supply sub-module includes: a filtering module having a first end, a second end, and a third end. The first end of the filtering module is used to receive a positive power supply signal, and the second end of the filtering module is grounded; an anti-reverse connection circuit having a first end, a second end, and a third end. The first end of the anti-reverse connection circuit is electrically connected to the filtering module. The second end of the anti-reverse connection circuit is used to receive the positive power supply signal, and the third end of the anti-reverse connection circuit is grounded.

[0007] Further, the power supply module includes a first power supply sub-module and a second power supply sub-module. The main control module includes a main control chip. The second power supply sub-module includes: a first resistor, the first end of the first resistor is electrically connected to the first VDD pin of the main control chip; a second resistor, the first end of the second resistor is electrically connected to the second end of the first resistor, and the second end of the second resistor is used to input a first sensor signal; a first capacitor, the first end of the first capacitor is electrically connected to the second end of the second resistor, and the second end of the first capacitor is grounded.

[0008] Further, the main control module includes a main control chip. The drive control system of the centrifugal water pump further includes an external input control module. The external input control module includes a first external input control sub-module and a second external input control sub-module. The first external input control sub-module includes: a third resistor, the first end of the third resistor is electrically connected to the main control chip; a fourth resistor, the first end of the fourth resistor is electrically connected to the second end of the third resistor; a second capacitor, the first end of the second capacitor is electrically connected to the second end of the fourth resistor, and the second end of the second capacitor is grounded.

[0009] Further, the drive control system of the centrifugal water pump further includes an external input control module. The external input control module includes a first external input control sub-module and a second external input control sub-module. The second external input control sub-module includes: a fifth resistor, the first end of the fifth resistor is used to receive a first PWM signal; a first diode, a sixth resistor, and a third capacitor. The negative electrode of the first diode, the first end of the sixth resistor, the first end of the third capacitor, and the second end of the fifth resistor are electrically connected. The positive electrode of the first diode, the second end of the sixth resistor, and the second end of the third capacitor are grounded; a seventh resistor, the first end of the seventh resistor is used to receive a second PWM signal; a second diode, an eighth resistor, and a fourth capacitor. The negative electrode of the second diode, the first end of the eighth resistor, the first end of the fourth capacitor, and the second end of the seventh resistor are electrically connected. The positive electrode of the second diode, the second end of the eighth resistor, and the second end of the fourth capacitor are grounded.

[0010] Further, the state detection and display module further includes a state detection module, and the state detection module includes a first state detection sub-module and a second state detection sub-module. The first state detection sub-module includes: a ninth resistor, the first end of which is used to receive a positive power supply signal; a tenth resistor, the first end of which is electrically connected to the second end of the ninth resistor, and the second end of the tenth resistor is grounded; an eleventh resistor, the first end of which is respectively electrically connected to the first end of the tenth resistor and the second end of the ninth resistor; a fifth capacitor, the first end of which is electrically connected to the second end of the eleventh resistor, and the second end of the fifth capacitor is grounded.

[0011] Further, the state detection and display module further includes a state detection module, and the state detection module includes a first state detection sub-module and a second state detection sub-module. The second state detection sub-module includes: a sixth capacitor, the first end of which is grounded; a twelfth resistor, the first end of which is electrically connected to the first end of the sixth capacitor; a thirteenth resistor, the first end of which is electrically connected to the second end of the sixth capacitor; an amplifier, the positive input terminal of which is electrically connected to the second end of the thirteenth resistor, and the negative input terminal of the amplifier is electrically connected to the second end of the twelfth resistor; a fourteenth resistor, the first end of which is electrically connected to the output terminal of the amplifier; a seventh capacitor, the first end of which is electrically connected to the second end of the fourteenth resistor, and the second end of the seventh capacitor is grounded.

[0012] Further, the drive module includes: a first drive sub-module, the first end of which is used to receive a positive power supply signal, and the second end of the first drive sub-module is connected to the U-phase winding of the water pump; a second drive sub-module, the first end of which is used to receive a positive power supply signal, and the second end of the second drive sub-module is connected to the V-phase winding of the water pump; a third drive sub-module, the first end of which is used to receive a positive power supply signal, and the second end of the third drive sub-module is connected to the W-phase winding of the water pump; a sampling resistor, the first end of which is respectively electrically connected to the first drive sub-module, the second drive sub-module and the third drive sub-module, and the second end of the sampling resistor is grounded.

[0013] Further, the main control module includes a main control chip, and the first driving sub-module includes: a first current-limiting resistor, the first end of which is electrically connected to the main control chip; a first MOS transistor, the gate of which is connected to the first current-limiting resistor, and the source of the first MOS transistor is used to receive a positive power supply signal; a first filter capacitor, the first pole of which is electrically connected to the source of the first MOS transistor, and the second end of the first filter capacitor is grounded; a second MOS transistor, the drain of which is electrically connected to the drain of the first MOS transistor and is connected to the U-phase winding of the water pump, and the source of the second MOS transistor is electrically connected to the first end of the sampling resistor; a second current-limiting resistor, the first end of which is electrically connected to the main control chip, and the second end of the second current-limiting resistor is electrically connected to the gate of the second MOS transistor.

[0014] Further, the main control module includes a main control chip, and the status detection and display module further includes a status display module, which includes: a third current-limiting resistor, the first end of which is electrically connected to the main control chip; a light-emitting diode, the positive electrode of which is electrically connected to the second end of the third current-limiting resistor, and the negative electrode of the light-emitting diode is grounded.

[0015] Applying the technical solution of the present application, the above-mentioned driving control system of the centrifugal water pump includes: a power supply module for receiving an external power supply signal; a main control module, the power supply terminal of which is electrically connected to the power supply module, and the power supply module is used to supply power to the main control module; a driving module electrically connected to the power supply module and the main control module; a status detection and display module electrically connected to the main control module; a water pump electrically connected to the driving module and the status detection module, the driving module is used to drive the water pump to work, and the status detection and display module is used to detect and display the operating status of the water pump in real time. In this system, the main control module communicates with the driving module. The driving module outputs and drives the water pump to run in real time, enabling fast response of water pump control; during the operation of the whole machine, the water pump can detect the phase current and the supply bus current of the water pump in real time through the status detection module. By processing the data collected by the status detection module and comparing it with the status threshold set inside the main control module, the working status of the water pump can be judged. This system can be integrated inside the water pump, with high reliability; it solves the problems in the prior art that the driving control method of the centrifugal water pump is single, the operating status of the water pump cannot be detected during operation, and there is a certain lag, resulting in unstable operation of the water pump and affecting the user experience. Description of the Drawings

[0016] The specification drawings forming a part of the present application are used to provide a further understanding of the present application. The schematic embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation to the present application. In the drawings:

[0017] Figure 1 Shows a schematic structural diagram of a drive control system for a centrifugal water pump provided according to an embodiment of the present application;

[0018] Figure 2 Shows a schematic structural diagram of a first power supply sub-module provided according to an embodiment of the present application;

[0019] Figure 3 Shows a schematic structural diagram of a second power supply sub-module provided according to an embodiment of the present application;

[0020] Figure 4 Shows a schematic structural diagram of a main control chip provided according to an embodiment of the present application;

[0021] Figure 5 Shows a schematic structural diagram of another drive control system for a centrifugal water pump provided according to an embodiment of the present application;

[0022] Figure 6 Shows a schematic structural diagram of a first external input control sub-module provided according to an embodiment of the present application;

[0023] Figure 7 Shows a schematic structural diagram of a second external input control sub-module provided according to an embodiment of the present application;

[0024] Figure 8 Shows a schematic structural diagram of a first state detection sub-module provided according to an embodiment of the present application;

[0025] Figure 9 Shows a schematic structural diagram of a second state detection sub-module provided according to an embodiment of the present application;

[0026] Figure 10 Shows a schematic structural diagram of a drive module provided according to an embodiment of the present application;

[0027] Figure 11 Shows a schematic structural diagram of a state display module provided according to an embodiment of the present application.

[0028] Among them, the above-mentioned drawings include the following reference numerals:

[0029] 10. Power supply module; 11. Filter module; 12. Reverse connection prevention circuit; 20. Main control module; 30. Drive module; 31. First drive sub-module; 32. Second drive sub-module; 33. Third drive sub-module; 40. State detection and display module; 50. Water pump; 60. External input control module; 70. State detection module; 80. State display module. Detailed implementation manners

[0030] It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this application belongs.

[0031] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they specify the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0032] It should be understood that when an element (such as a layer, film, region, or substrate) is described as being "on" another element, the element can be directly on the other element or there can also be an intermediate element. Moreover, in the specification and claims, when an element is described as "connected" to another element, the element can be "directly connected" to the other element or "connected" to the other element through a third element.

[0033] As introduced in the background art, the traditional drive control method is single, there is only one drive control module and it cannot be integrated inside the water pump. The operating state of the water pump during operation cannot be detected, which has certain limitations. In order to solve the problems in the prior art that the drive control method of the centrifugal water pump is single, the operating state of the water pump during operation cannot be detected, and there is a certain lag, resulting in unstable operation of the water pump and affecting the user experience, the present application proposes a drive control system for a centrifugal water pump.

[0034] Figure 1 Is a schematic structural diagram of a drive control system for a centrifugal water pump, as Figure 1 shown, the drive control system of the centrifugal water pump includes: a power supply module 10, the above-mentioned power supply module 10 is used to receive an external power supply signal; a main control module 20, the power supply terminal of the above-mentioned main control module 20 is electrically connected to the above-mentioned power supply module 10, and the above-mentioned power supply module 10 is used to supply power to the above-mentioned main control module 20; a drive module 30, the above-mentioned drive module 30 is respectively electrically connected to the above-mentioned power supply module 10 and the above-mentioned main control module 20; a state detection and display module 40, the above-mentioned state detection and display module 40 is electrically connected to the above-mentioned main control module 20; a water pump 50, the above-mentioned water pump 50 is respectively electrically connected to the above-mentioned drive module 30 and the above-mentioned state detection and display module 40, the above-mentioned drive module 30 is used to drive the above-mentioned water pump 50 to work, and the above-mentioned state detection and display module is used to detect and display the operating state of the above-mentioned water pump 50 in real time.

[0035] The drive control system of the centrifugal water pump of the present application includes: a power supply module for receiving an external power supply signal; a main control module, the power supply terminal of the main control module is electrically connected to the power supply module, and the power supply module is used to supply power to the main control module; a drive module, the drive module is electrically connected to the power supply module and the main control module; a status detection and display module, the status detection and display module is electrically connected to the main control module; a water pump, the water pump is electrically connected to the drive module and the status detection module, the drive module is used to drive the water pump to work, and the status detection and display module is used to detect and display the operating status of the water pump in real time. In this system, the main control module communicates with the drive module. The drive module outputs and drives the water pump to run in real time, enabling rapid response of water pump control; during the operation of the whole machine, the water pump can detect the phase current and the power supply bus current of the water pump in real time through the status detection module. By processing the data collected by the status detection module and comparing it with the status threshold set inside the main control module, the working operation status of the water pump can be judged. This system can be integrated inside the water pump, with high reliability; it solves the problems in the prior art that the drive control method of the centrifugal water pump is single, the operating status of the water pump cannot be detected during operation, and there is a certain lag, resulting in unstable operation of the water pump and affecting the user experience.

[0036] Among them, the external power supply is the external input power supply of the whole machine; the power supply module is used to provide a stable power input to the system; the drive module is used to drive the above-mentioned water pump to run; the above-mentioned status detection module is used to sample and detect the phase current and the bus current of the above-mentioned water pump in real time, and feedback this signal to the above-mentioned main control module; the above-mentioned main control module is used to collect and process the data feedback by the above-mentioned status detection module, compare it with the threshold set by the system, judge the operation status of the water pump, and send a drive control signal to the drive module to adjust the operation status of the water pump; the above-mentioned status display module is used to indicate the operation status of the water pump; the above-mentioned external input control module is used to provide a variety of system control schemes.

[0037] The power supply module is used to provide the required stable voltage for each module in the above control drive system, including but not limited to various forms such as batteries, regulated power supplies, and voltage regulation circuits;

[0038] The operating status of the centrifugal water pump includes but not limited to normal operation, water shortage and air extraction operation, and water outlet blockage operation;

[0039] The above-mentioned main control module can adopt different main control chips and external circuits according to the actual requirements of the whole machine system, set different control drive logics, and control the operating status of the above-mentioned centrifugal water pump in gradients according to the set threshold; the main control module is also used to judge the operating status of the water pump and display the operating status of the water pump to the user through the status display module.

[0040] Figure 2 Schematic diagram of the structure of the first power sub-module, as Figure 2As shown in the figure, the above-mentioned power supply module 10 includes a first power supply sub-module and a second power supply sub-module. The first power supply sub-module includes: a filtering module 11, which has a first end, a second end, and a third end. The first end of the filtering module 11 is used to receive a positive power supply signal, and the second end of the filtering module 11 is grounded; an anti-reverse connection circuit 12, which has a first end, a second end, and a third end. The first end of the anti-reverse connection circuit 12 is electrically connected to the filtering module 11. The second end of the anti-reverse connection circuit 12 is used to receive the positive power supply signal, and the third end of the anti-reverse connection circuit 12 is grounded.

[0041] Specifically, the filtering module is used to filter out interference signals, and the anti-reverse connection circuit is used to protect the system to work stably.

[0042] Among them, as Figure 2 shown, the filtering module includes capacitor C4 and capacitor C5, and the anti-reverse connection circuit includes diode TVS1, resistors R19 and R20, and triode Q7. The specific connection structure of the filtering module and the anti-reverse connection circuit is as Figure 2 shown.

[0043] Figure 3 is a schematic structural diagram of the second power supply sub-module. As Figure 3 shown, the above-mentioned power supply module includes a first power supply sub-module and a second power supply sub-module. The above-mentioned main control module includes a main control chip. The second power supply sub-module includes: a first resistor R10, the first end of the first resistor R10 is electrically connected to the first VDD pin (VDD5) of the main control chip; a second resistor R11, the first end of the second resistor R11 is electrically connected to the second end of the first resistor R10, and the second end of the second resistor R11 is used to input a first sensor signal (SR); a first capacitor C10, the first end of the first capacitor C10 is electrically connected to the second end of the second resistor R11, and the second end of the first capacitor C10 is grounded.

[0044] Among them, the main control chip uses the FU6832S SSOP24 chip, which is a high-performance motor control dedicated chip integrating a motor control engine (ME) and an 8051 core. The structural diagram of the main control chip is as Figure 4 shown. In some instances, other models of chips can also be used, not limited to the above model.

[0045] Among them, as Figure 3 shown, the first end of the second resistor R11 and the second end of the first resistor R10 are test points.

[0046] Specifically, the power supply module is used to provide a stable power supply input for the system.

[0047] Figure 5 is a schematic structural diagram of another drive control system for a centrifugal water pump. As Figure 5As shown, the above main control module includes a main control chip. The drive control system of the above centrifugal water pump further includes an external input control module 60. The external input control module 60 includes a first external input control sub-module and a second external input control sub-module. Figure 6 is a schematic structural diagram of the first external input control sub-module. As Figure 6 shown, the first external input control sub-module includes: a third resistor R23, the first end of the third resistor R23 is electrically connected to the main control chip; a fourth resistor R22, the first end of the fourth resistor R22 and the second end of the third resistor R23 are electrically connected; a second capacitor C17, the first end of the second capacitor C17 and the second end of the fourth resistor R22 are electrically connected, and the second end of the second capacitor C17 is grounded.

[0048] Among them, the specific structure of the central control chip is as Figure 4 shown. The first end of the third resistor R23 is electrically connected to the VDD5 pin of the main control chip. The second end of the fourth resistor R22 is connected to the FG signal, and this endpoint is also a test point. The above resistors and capacitors are all used to protect the stable operation of the circuit.

[0049] Figure 5 is a schematic structural diagram of another drive control system of a centrifugal water pump. As Figure 5 shown, the drive control system of the above centrifugal water pump further includes an external input control module 60. The external input control module 60 includes a first external input control sub-module and a second external input control sub-module. Figure 7 is a schematic structural diagram of the second external input control sub-module. As Figure 7 shown, the second external input control sub-module includes: a fifth resistor R25, the first end of the fifth resistor R25 is used to receive the first PWM signal (PWM1), and this end is a test point; a first diode TVS2, a sixth resistor R24, and a third capacitor C18. The negative electrode of the first diode TVS2, the first end of the sixth resistor R24, the first end of the third capacitor C18, and the second end of the fifth resistor R25 are electrically connected. The positive electrode of the first diode TVS2, the second end of the sixth resistor R24, and the second end of the third capacitor C18 are grounded; a seventh resistor R27, the first end of the seventh resistor R27 is used to receive the second PWM signal (PWM2), and this end is a test point; a second diode TVS3, an eighth resistor R26, and a fourth capacitor C19. The negative electrode of the second diode TVS3, the first end of the eighth resistor R26, the first end of the fourth capacitor C19, and the second end of the seventh resistor R27 are electrically connected. The positive electrode of the second diode TVS3, the second end of the eighth resistor R26, and the second end of the fourth capacitor C19 are grounded.

[0050] Specifically, the external input control module is used to provide multiple system control schemes, including two optional methods of analog input channel AD_IN and PWM input control. Diodes, resistors, and capacitors are used to protect the stable operation of the circuit. The external input control module is used for external control by users and can use forms of 0-5V analog input control and PWM input control.

[0051] Figure 5 It is a structural schematic diagram of another driving control system for a centrifugal water pump, as Figure 5 shown. The above-mentioned status detection and display module further includes a status detection module 70. The above-mentioned status detection module 70 includes a first status detection sub-module and a second status detection sub-module. Figure 8 It is a structural schematic diagram of the first status detection sub-module, as Figure 8 shown. The first status detection sub-module includes: a ninth resistor R1, the first end of the above-mentioned ninth resistor R1 is used to receive a positive power supply signal; a tenth resistor R6, the first end of the above-mentioned tenth resistor R6 is electrically connected to the second end of the above-mentioned ninth resistor R1, and the second end of the above-mentioned tenth resistor R6 is grounded; an eleventh resistor R5, the first end of the above-mentioned eleventh resistor R5 is respectively electrically connected to the first end of the above-mentioned tenth resistor R6 and the second end of the above-mentioned ninth resistor R1; a fifth capacitor C6, the first end of the above-mentioned fifth capacitor C6 is electrically connected to the second end of the above-mentioned eleventh resistor R5, and the second end of the above-mentioned fifth capacitor C6 is grounded.

[0052] Among them, the positive power supply signal is generally 24V. The above-mentioned status detection module uses an external chip operational amplifier for sampling detection. The operating states of the centrifugal water pump include normal operation, water shortage and dry running state operation, and water outlet blockage operation; the status detection module is used to sample and detect the phase current and bus current of the above-mentioned water pump in real time and feed this signal back to the above-mentioned main control module; the status detection module is used to sample and detect the phase current and bus current of the centrifugal water pump during operation, including an operational amplifier and a sampling circuit; the sampling forms include but are not limited to various forms such as single-resistor sampling, double-resistor sampling, and triple-resistor sampling, and the sampling detection chips include but are not limited to external chip sampling and internal sampling of the main control chip.

[0053] The status detection module samples and detects the above-mentioned phase current and bus current of the water pump in real time, processes the collected current signal through an operational amplifier and feeds it back to the above-mentioned main control module. The main control module collects and processes the signal fed back by the status detection module, and compares it with the first status threshold and the second status threshold to judge the operation status of the above-mentioned water pump. When the phase current of the above-mentioned water pump exceeds the second status threshold preset by the main control module, the main control module judges that the above-mentioned water pump is in the water shortage and dry running state at this time, cuts off the driving signal through the above-mentioned driving module, stops the above-mentioned water pump, and indicates that the water pump is in the water shortage and dry running state through the above-mentioned status display module; when the phase current of the above-mentioned water pump is less than the first status threshold preset by the main control module, the main control module judges that the above-mentioned water pump is in the water outlet blockage and stall running state at this time, cuts off the driving signal through the above-mentioned driving module, stops the above-mentioned water pump, and indicates that the above-mentioned water pump is in the water outlet blockage and stall running state through the above-mentioned status display module; when the phase current of the above-mentioned water pump is greater than the first status threshold preset by the main control module and less than the second status threshold preset by the main control module, the main control module judges that the above-mentioned water pump is in the normal running state at this time, outputs a normal driving signal through the above-mentioned driving module to drive the above-mentioned water pump to run stably, and indicates that the above-mentioned water pump is in the normal running state through the above-mentioned status display module.

[0054] Figure 5 is a schematic structural diagram of a drive control system for another centrifugal water pump, as Figure 5 shown, the above-mentioned status detection and display module further includes a status detection module 70, and the status detection module 70 includes a first status detection sub-module and a second status detection sub-module. Figure 9 is a schematic structural diagram of the second status detection sub-module, as Figure 9 shown, the second status detection sub-module includes: a sixth capacitor C12, the first end of the sixth capacitor C12 is grounded; a twelfth resistor R16, the first end of the twelfth resistor R16 is electrically connected to the first end of the sixth capacitor C12; a thirteenth resistor R18, the first end of the thirteenth resistor R18 is electrically connected to the second end of the sixth capacitor C12; an amplifier AMP0, the positive input terminal (AMP0P) of the amplifier AMP0 is electrically connected to the second end of the thirteenth resistor R18, the negative input terminal (AMP0M) of the amplifier AMP0 is electrically connected to the second end of the twelfth resistor R16; a fourteenth resistor R17, the first end of the fourteenth resistor R17 is electrically connected to the output terminal of the amplifier AMP0; a seventh capacitor C13, the first end of the seventh capacitor C13 is electrically connected to the second end of the fourteenth resistor R17, and the second end of the seventh capacitor C13 is grounded.

[0055] Among them, C12 is the output filter capacitor, mainly filtering out the signal interference of the status acquisition module; C13 is the output filter capacitor, mainly filtering out the output signal interference of the main control module; AMP0 is an amplifier. The phase current collected by the status detection module is converted into a voltage signal, which is amplified by the amplifier and then input into the main control module.

[0056] Figure 10 is the structural schematic diagram of the second status detection sub-module, as Figure 10 shown. The above-mentioned driving module includes: a first driving sub-module 31. The first end of the first driving sub-module 31 is used to receive a positive power supply signal, and the second end of the first driving sub-module 31 is connected to the U-phase winding of the water pump; a second driving sub-module 32. The first end of the second driving sub-module 32 is used to receive a positive power supply signal, and the second end of the second driving sub-module 32 is connected to the V-phase winding of the water pump; a third driving sub-module 33. The first end of the third driving sub-module 33 is used to receive a positive power supply signal, and the second end of the third driving sub-module 33 is connected to the W-phase winding of the water pump; a sampling resistor RS1. The first end of the sampling resistor RS1 is electrically connected to the first driving sub-module 31, the second driving sub-module 32, and the third driving sub-module 33 respectively, and the second end of the sampling resistor RS1 is grounded.

[0057] Among them, as Figure 10 shown, the positive power supply signal is generally 24V. In this system, the main control module is linked and communicates with the driving module. The driving module outputs in real time and drives the water pump to operate, enabling fast response of water pump control.

[0058] Figure 10 is the structural schematic diagram of the second status detection sub-module, as Figure 10 shown. The above-mentioned main control module includes a main control chip. The first driving sub-module includes: a first current-limiting resistor R2. The first end of the first current-limiting resistor R2 is electrically connected to the main control chip; a first MOS transistor Q1. The gate of the first MOS transistor Q1 is connected to the first current-limiting resistor R2, and the source of the first MOS transistor Q1 is used to receive a positive power supply signal; a first filter capacitor C1. The first pole of the first filter capacitor C1 is electrically connected to the source of the first MOS transistor Q1, and the second end of the first filter capacitor C1 is grounded; a second MOS transistor Q4. The drain of the second MOS transistor Q4 is electrically connected to the drain of the first MOS transistor Q1 and is connected to the U-phase winding of the water pump, and the source of the second MOS transistor Q4 is electrically connected to the first end of the sampling resistor RS1; a second current-limiting resistor R7. The first end of the second current-limiting resistor R7 is electrically connected to the main control chip, and the second end of the second current-limiting resistor R7 is electrically connected to the gate of the second MOS transistor Q4.

[0059] As Figure 10As shown, the second drive sub-module consists of resistors R3, R8, MOS transistors Q2, Q5, and capacitor C2, and the third drive sub-module consists of resistors R4, R9, MOS transistors Q3, Q6, and capacitor C3. The specific connection structure is as Figure 10 shown. Among them, Q1-6 are power MOS transistors, and the water pump is controlled to work by controlling the on and off of the MOS transistors; R2-9 are current-limiting resistors, mainly protecting the I / O ports of the main control chip from being burned out; C1-C3 are filter capacitors, mainly filtering out the interference signals input by the power supply; U, V, and W are connected to the three-phase windings of the water pump; RS1 is a sampling resistor, mainly used for the status acquisition module to acquire the phase current of the water pump.

[0060] Figure 5 is a schematic structural diagram of the drive control system of another centrifugal water pump. As Figure 5 shown, the above-mentioned main control module includes a main control chip, and the above-mentioned status detection and display module further includes a status display module 80. Figure 11 is a schematic structural diagram of the status display module. As Figure 11 shown, the above-mentioned status display module includes: a third current-limiting resistor R21, the first end of the third current-limiting resistor R21 is electrically connected to the above-mentioned main control chip; a light-emitting diode Led1, the positive electrode of the light-emitting diode Led1 is electrically connected to the second end of the third current-limiting resistor R21, and the negative electrode of the light-emitting diode Led1 is grounded.

[0061] Among them, Led1 is a light-emitting diode, used to output and indicate the operating state of the water pump; R21 is a current-limiting resistor, protecting the light-emitting diode to work stably.

[0062] The status display module is used to output the operating state of the above-mentioned centrifugal water pump, including but not limited to the above-mentioned water pump operating state, water pump operating parameters, system parameters, etc.; the manifestation form or carrier of the above-mentioned status display module includes but not limited to light indication, sound indication, text and numerical indication, image indication, etc.

[0063] From the above description, it can be seen that the above embodiments of the present application achieve the following technical effects:

[0064] The drive control system of the centrifugal water pump of the present application includes: a power supply module for receiving an external power supply signal; a main control module, the power supply terminal of the main control module is electrically connected to the power supply module, and the power supply module is used to supply power to the main control module; a drive module, the drive module is electrically connected to the power supply module and the main control module; a status detection and display module, the status detection and display module is electrically connected to the main control module; a water pump, the water pump is electrically connected to the drive module and the status detection module, the drive module is used to drive the water pump to work, and the status detection and display module is used to detect and display the operating status of the water pump in real time. In this system, the main control module is linked and communicates with the drive module, and the drive module outputs and drives the water pump to operate in real time, enabling rapid response of water pump control; during the operation of the whole machine, the water pump can detect the phase current and the power supply bus current of the water pump in real time through the status detection module, and by processing the data collected by the status detection module and comparing it with the status threshold set inside the main control module, the working operation status of the water pump can be judged. This system can be integrated inside the water pump, with high reliability; it solves the problems in the prior art that the drive control method of the centrifugal water pump is single, the operating status of the water pump cannot be detected during operation, and there is a certain lag, resulting in unstable operation of the water pump and affecting the user experience.

[0065] The foregoing are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A drive control system for a centrifugal water pump, characterized in that: include: A power module, the power module is used to receive an external power supply signal; A main control module, wherein a power supply end of the main control module is electrically connected to the power supply module, and the power supply module is used to provide power to the main control module; A driving module, wherein the driving module is electrically connected to the power module and the main control module respectively; A status detection and display module, wherein the status detection and display module is electrically connected to the main control module; A water pump is electrically connected to the driving module and the status detection and display module respectively, the driving module is used to drive the water pump to work, and the status detection and display module is used to detect and display the operating status of the water pump in real time.

2. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The power module includes a first power submodule and a second power submodule, wherein the first power submodule includes: A filter module having a first end, a second end and a third end, wherein the first end of the filter module is used to receive a positive power supply signal, and the second end of the filter module is grounded; The anti-reverse connection circuit has a first end, a second end and a third end. The first end of the anti-reverse connection circuit is electrically connected to the filter module, the second end of the anti-reverse connection circuit is used to receive the positive power supply signal, and the third end of the anti-reverse connection circuit is grounded.

3. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The power module includes a first power submodule and a second power submodule, the main control module includes a main control chip, and the second power submodule includes: A first resistor, wherein a first end of the first resistor is electrically connected to a first VDD pin of the main control chip; a second resistor, a first end of the second resistor being electrically connected to a second end of the first resistor, and the second end of the second resistor being used to input a first sensor signal; A first capacitor, wherein a first end of the first capacitor is electrically connected to a second end of the second resistor, and a second end of the first capacitor is grounded.

4. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The main control module includes a main control chip, and the drive control system of the centrifugal water pump also includes an external input control module, and the external input control module includes a first external input control submodule and a second external input control submodule, and the first external input control submodule includes: a third resistor, a first end of the third resistor being electrically connected to the main control chip; a fourth resistor, a first end of the fourth resistor being electrically connected to a second end of the third resistor; A second capacitor, wherein a first end of the second capacitor is electrically connected to a second end of the fourth resistor, and a second end of the second capacitor is grounded.

5. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The driving control system of the centrifugal water pump further includes an external input control module, the external input control module includes a first external input control submodule and a second external input control submodule, the second external input control submodule includes: a fifth resistor, wherein a first end of the fifth resistor is used for receiving a first PWM signal; a first diode, a sixth resistor and a third capacitor, wherein the cathode of the first diode, the first end of the sixth resistor, the first end of the third capacitor and the second end of the fifth resistor are electrically connected, and the anode of the first diode, the second end of the sixth resistor and the second end of the third capacitor are grounded; a seventh resistor, wherein a first end of the seventh resistor is used for receiving a second PWM signal; A second diode, an eighth resistor and a fourth capacitor, the cathode of the second diode, the first end of the eighth resistor, the first end of the fourth capacitor and the second end of the seventh resistor are electrically connected, and the anode of the second diode, the second end of the eighth resistor and the second end of the fourth capacitor are grounded.

6. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The state detection and display module further includes a state detection module, the state detection module includes a first state detection submodule and a second state detection submodule, the first state detection submodule includes: a ninth resistor, wherein a first end of the ninth resistor is used for receiving a positive power supply signal; a tenth resistor, wherein a first end of the tenth resistor is electrically connected to a second end of the ninth resistor, and a second end of the tenth resistor is grounded; an eleventh resistor, a first end of the eleventh resistor being electrically connected to the first end of the tenth resistor and the second end of the ninth resistor respectively; A fifth capacitor, wherein a first end of the fifth capacitor is electrically connected to the second end of the eleventh resistor, and a second end of the fifth capacitor is grounded.

7. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The state detection and display module further includes a state detection module, the state detection module includes a first state detection submodule and a second state detection submodule, the second state detection submodule includes: A sixth capacitor, a first end of the sixth capacitor is grounded; a twelfth resistor, a first end of the twelfth resistor being electrically connected to the first end of the sixth capacitor; a thirteenth resistor, a first end of the thirteenth resistor being electrically connected to the second end of the sixth capacitor; an amplifier, wherein a positive input terminal of the amplifier is electrically connected to the second end of the thirteenth resistor, and a negative input terminal of the amplifier is electrically connected to the second end of the twelfth resistor; a fourteenth resistor, a first end of the fourteenth resistor being electrically connected to the output end of the amplifier; A seventh capacitor, wherein a first end of the seventh capacitor is electrically connected to the second end of the fourteenth resistor, and a second end of the seventh capacitor is grounded.

8. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The driving module comprises: A first driving submodule, wherein a first end of the first driving submodule is used to receive a positive power supply signal, and a second end of the first driving submodule is connected to a U-phase winding of the water pump; a second driving submodule, wherein a first end of the second driving submodule is used to receive a positive power supply signal, and a second end of the second driving submodule is connected to a V-phase winding of the water pump; A third driving submodule, wherein a first end of the third driving submodule is used to receive a positive power supply signal, and a second end of the third driving submodule is connected to a W-phase winding of the water pump; A sampling resistor, wherein a first end of the sampling resistor is electrically connected to the first driving submodule, the second driving submodule and the third driving submodule respectively, and a second end of the sampling resistor is grounded.

9. The driving control system of a centrifugal water pump according to claim 8, characterized in that: The main control module includes a main control chip, and the first driving submodule includes: A first current limiting resistor, wherein a first end of the first current limiting resistor is electrically connected to the main control chip; a first MOS transistor, a gate of the first MOS transistor and the first current limiting resistor, and a source of the first MOS transistor for receiving a positive power supply signal; A first filter capacitor, wherein a first electrode of the first filter capacitor is electrically connected to a source electrode of the first MOS transistor, and a second end of the first filter capacitor is grounded; a second MOS tube, wherein a drain of the second MOS tube is electrically connected to the drain of the first MOS tube and connected to the U-phase winding of the water pump, and a source of the second MOS tube is electrically connected to the first end of the sampling resistor; A second current limiting resistor, wherein a first end of the second current limiting resistor is electrically connected to the main control chip, and a second end of the second current limiting resistor is electrically connected to the gate of the second MOS tube.

10. The driving control system of a centrifugal water pump according to claim 1, characterized in that: The main control module includes a main control chip, the status detection and display module also includes a status display module, and the status display module includes: A third current limiting resistor, a first end of which is electrically connected to the main control chip; A light emitting diode, wherein the anode of the light emitting diode is electrically connected to the second end of the third current limiting resistor, and the cathode of the light emitting diode is grounded.

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