Frequency conversion water pump electric leakage detection method and system

Abstract

The invention discloses a frequency conversion water pump electric leakage detection method and system. The method comprises the following steps that the voltage change value, the current change value and the insulation resistance change value of a frequency conversion water pump are collected; setting a first safety threshold, a second safety threshold and a third safety threshold; judging whether the voltage change value of the variable-frequency water pump is greater than a first safety threshold value or whether the current change value of the variable-frequency water pump is greater than a second safety threshold value, and if not, indicating that the variable-frequency water pump operates normally; if yes, the variable-frequency water pump breaks down, whether the insulation resistance change value of the variable-frequency water pump is smaller than a third safety threshold value or not is judged, and if yes, the variable-frequency water pump leaks electricity; if not, the variable-frequency water pump has no electric leakage. The problem that in the traditional variable frequency water pump detection field, it is often difficult to comprehensively and accurately detect the electric leakage condition of the variable frequency water pump through a single-dimension detection mode is solved.

Description

Technical Field

[0001] The invention relates to the technical field of variable frequency water pump leakage detection, and in particular to a variable frequency water pump leakage detection method and system. Background Art

[0002] In the field of traditional variable frequency pump leakage detection, the focus is usually on collecting a key operating parameter of the variable frequency pump, such as the voltage change value or the current change value, as the main basis for judging whether it has leakage. However, since the operating state of the variable frequency pump is affected by multiple factors, this single-dimensional detection method is often difficult to fully and accurately detect the leakage of the variable frequency pump. For example, a short fluctuation in voltage or current may be caused by normal grid disturbances or load adjustments, rather than leakage, which may lead to false alarms or missed alarms. Summary of the invention

[0003] In view of the above-mentioned defects, the present invention proposes a variable frequency water pump leakage detection method and system, aiming to solve the problem that in the traditional variable frequency water pump detection field, a single-dimensional detection method is often difficult to comprehensively and accurately detect the leakage of the variable frequency water pump.

[0004] To achieve this object, the present invention adopts the following technical solutions:

[0005] A variable frequency water pump leakage detection method comprises the following steps:

[0006] Step S1: collecting the voltage change value, current change value and insulation resistance change value of the variable frequency water pump;

[0007] Step S2: setting a first safety threshold, a second safety threshold and a third safety threshold;

[0008] Step S3: Determine whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump has a fault, and determine whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has a leakage; if not, it means that the variable frequency water pump has no leakage.

[0009] Preferably, in step S3, in the process of judging whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold, the following sub-steps are specifically included:

[0010] When it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle, it is preferred to judge whether the variable frequency water pump is operating normally by comparing whether the voltage change value is greater than the first safety threshold; when it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle, it is preferred to judge whether the variable frequency water pump is operating normally by comparing whether the current change value is greater than the second safety threshold; when the voltage and current of the variable frequency water pump are in a relatively stable state, it is judged whether the variable frequency water pump is operating normally by comparing whether any one of the voltage change value or the current change value is greater than the corresponding safety threshold.

[0011] Preferably, the method further includes the following steps: when it is determined that the variable frequency water pump has leakage, the leakage protection mechanism task is triggered and a leakage alarm signal is generated.

[0012] Preferably, the method further includes the following steps: when it is determined that the variable frequency water pump operates normally or has no leakage, the current voltage value, current value and insulation resistance value of the variable frequency water pump are recorded.

[0013] Preferably, the method further comprises the following steps: when leakage detection is required for a plurality of variable frequency water pumps, the plurality of variable frequency water pumps are divided into different priority levels, and different detection times are set for the variable frequency water pumps of each priority level.

[0014] Another aspect of the present application provides a variable frequency water pump leakage detection system, the system comprising:

[0015] The acquisition module is used to acquire the voltage change value, current change value and insulation resistance change value of the variable frequency water pump;

[0016] A first setting module, used to set a first safety threshold, a second safety threshold and a third safety threshold;

[0017] The first judgment module is used to judge whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump fails, and the second judgment module is executed;

[0018] The second judgment module is used to judge whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has leakage; if not, it means that the variable frequency water pump has no leakage.

[0019] Preferably, the first judgment module includes:

[0020] The first selection submodule is used to determine whether the variable frequency water pump is operating normally by first comparing whether the voltage change value is greater than a first safety threshold when it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle;

[0021] The second selection submodule is used to determine whether the variable frequency water pump is operating normally by first comparing whether the current change value is greater than a second safety threshold when it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle;

[0022] The third selection submodule is used to determine whether the variable frequency water pump is operating normally by comparing whether any one of the voltage change value or the current change value is greater than its corresponding safety threshold when the voltage and current of the variable frequency water pump are in a relatively stable state.

[0023] Preferably, it also includes a trigger module and a generation module, the trigger module is used to trigger the leakage protection mechanism task, and the generation module is used to generate a leakage alarm signal; when it is determined that the variable frequency water pump has leakage, the trigger module and the generation module are executed.

[0024] Preferably, it also includes a recording module, which is used to record the voltage value, current value and insulation resistance value of the current variable frequency water pump; when it is determined that the variable frequency water pump is operating normally or no leakage occurs, the recording module is executed.

[0025] Preferably, it also includes a division module and a second setting module, the division module is used to divide a number of variable frequency water pumps into different priority levels, and the second setting module is used to set different detection times for variable frequency water pumps of each priority level; when leakage detection is required for a number of variable frequency water pumps, the division module and the second setting module are executed.

[0026] The technical solution provided by the embodiments of the present application may have the following beneficial effects:

[0027] In this solution, the voltage and current changes of the variable frequency water pump are first used to preliminarily determine whether the variable frequency water pump is operating normally. Then, when an abnormality is found, the insulation resistance of the variable frequency water pump is further changed to detect whether the variable frequency water pump is leaking electricity, which can reduce the blindness of fault diagnosis. This method of detecting whether the variable frequency water pump is leaking electricity through multiple dimensions can avoid the problem of false alarms or omissions that may be caused by judging only by a single parameter, thereby improving the accuracy and comprehensiveness of the variable frequency water pump leakage detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 The invention is a flow chart of steps of a variable frequency water pump leakage detection method. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions from beginning to end. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] A variable frequency water pump leakage detection method comprises the following steps:

[0031] Step S1: collecting the voltage change value, current change value and insulation resistance change value of the variable frequency water pump;

[0032] Step S2: setting a first safety threshold, a second safety threshold and a third safety threshold;

[0033] Step S3: Determine whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump has a fault, and determine whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has a leakage; if not, it means that the variable frequency water pump has no leakage.

[0034] A variable frequency water pump leakage detection method in this scheme, such as Figure 1As shown, the first step is to collect the voltage change value, current change value and insulation resistance change value of the variable frequency water pump. In this embodiment, by installing a voltage sensor and a current sensor at the power input end of the variable frequency water pump, the changes in voltage and current can be monitored in real time. The insulation resistance change of the variable frequency water pump is detected by using an insulation resistance tester. The second step is to set the first safety threshold, the second safety threshold and the third safety threshold. In this embodiment, by setting the first safety threshold, that is, the safety threshold of the voltage change value of the variable frequency water pump, it can be ensured that the variable frequency water pump works within the normal voltage range to avoid unstable operation or failure of the equipment due to voltage fluctuations. By setting the second safety threshold, that is, the safety threshold of the current change value of the variable frequency water pump, it can be ensured that the variable frequency water pump works within the normal current range to avoid the motor of the variable frequency water pump from being destroyed due to current overload or insufficient. By setting the third safety threshold, that is, the safety threshold of the insulation resistance change value of the variable frequency water pump, the insulation status of the variable frequency water pump can be more intuitively understood. Once the insulation resistance change value of the variable frequency water pump is found to be less than its corresponding safety threshold, it can be determined that the insulation performance of the variable frequency water pump is poor, indicating that the variable frequency water pump has leakage. The third step is to determine whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump has a fault, and determine whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has leakage; if not, it means that the variable frequency water pump has not leakage. Specifically, voltage and current are the most direct reflections of the motor's operating status. By monitoring these parameters in real time, it is possible to quickly capture whether the variable frequency water pump is in normal working condition. For example, an abnormal increase in current may indicate overload, blockage, or internal motor failure, while voltage fluctuations may be related to power quality or inverter settings. This initial diagnosis can quickly locate the scope of the problem and provide direction for subsequent in-depth inspections. After initially determining that there is an abnormality, it is an efficient and accurate method to confirm whether there is leakage by testing the insulation resistance. The reduction of insulation resistance is a direct sign of equipment leakage. Through this test, the leakage point can be quickly identified, providing a clear target for maintenance work.

[0035] In one embodiment, the voltage change value of the variable frequency water pump obtained through collection is 60V, the current change value of the variable frequency water pump is 90A, and the insulation resistance change value of the variable frequency water pump is 1 megohm, the first safety threshold is 50V, the second safety threshold is 80A, and the third safety threshold is 2 megohm. Through the first judgment, it is obtained that the voltage change value or the current change value of the variable frequency water pump is greater than the corresponding safety threshold, and it can be determined that the variable frequency water pump has a fault, and through the second judgment, it is obtained that the insulation resistance change value of the variable frequency water pump is less than the corresponding safety threshold, and it can be determined that the fault of the variable frequency water pump is specifically leakage, which is convenient for the staff to repair the leakage fault of the variable frequency water pump in time.

[0036] In this solution, the voltage and current changes of the variable frequency water pump are first used to preliminarily determine whether the variable frequency water pump is operating normally. Then, when an abnormality is found, the insulation resistance of the variable frequency water pump is further changed to detect whether the variable frequency water pump is leaking electricity, which can reduce the blindness of fault diagnosis. This method of detecting whether the variable frequency water pump is leaking electricity through multiple dimensions can avoid the problem of false alarms or omissions that may be caused by judging only by a single parameter, thereby improving the accuracy and comprehensiveness of the variable frequency water pump leakage detection.

[0037] Preferably, in step S3, in the process of judging whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold, the following sub-steps are specifically included:

[0038] When it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle, it is preferred to judge whether the variable frequency water pump is operating normally by comparing whether the voltage change value is greater than the first safety threshold; when it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle, it is preferred to judge whether the variable frequency water pump is operating normally by comparing whether the current change value is greater than the second safety threshold; when the voltage and current of the variable frequency water pump are in a relatively stable state, it is judged whether the variable frequency water pump is operating normally by comparing whether any one of the voltage change value or the current change value is greater than the corresponding safety threshold.

[0039] In this embodiment, when it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle, the significant change of voltage may directly affect the motor performance and operation stability of the variable frequency water pump. In contrast, the current fluctuation is relatively gentle, indicating that the load change of the motor of the variable frequency water pump is not large, or at least the change of current is not the main problem at present. Therefore, the voltage change value can be preferentially selected to judge whether the variable frequency water pump is operating normally. When it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle, the significant change of current means that the load or operating state of the motor has changed significantly, which may be an increase in the load of the water pump, an internal fault of the motor, etc. In contrast, the voltage fluctuation is relatively gentle, indicating that at least the change of voltage is not the main problem at present. Therefore, the current change value can be preferentially selected to judge whether the variable frequency water pump is operating normally. When the voltage and current of the variable frequency water pump are both in a relatively stable state, it means that the operating environment of the water pump is good and the motor performance is stable. Therefore, any one of the current change value or the voltage change value can be selected for monitoring, and as long as its value is within the safe range, the water pump can be considered to be operating normally.

[0040] Preferably, the following steps are also included: when it is determined that the variable frequency water pump has leakage, the leakage protection mechanism task is triggered and a leakage alarm signal is generated. In this embodiment, after it is determined that the variable frequency water pump has leakage, the power supply of the variable frequency water pump is immediately cut off and a leakage alarm signal is issued so that the staff can take timely measures to prevent the occurrence of safety accidents, thereby enhancing the safety of the variable frequency water pump during use.

[0041] Preferably, when it is determined that the variable frequency water pump is operating normally or no leakage occurs, the current voltage value, current value and insulation resistance value of the variable frequency water pump are recorded. In this embodiment, after it is determined that the variable frequency water pump is operating normally or no leakage occurs, the current voltage value, current value and insulation resistance value of the variable frequency water pump are recorded as reference values ​​for subsequent detection, so as to perform long-term performance monitoring and preventive maintenance.

[0042] Preferably, when leakage detection is required for several variable frequency water pumps, the several variable frequency water pumps are divided into different priority levels, and different detection times are set for the variable frequency water pumps of each priority level. In this embodiment, in the process of dividing the multiple variable frequency water pumps into different priority levels, by analyzing the historical fault records of each variable frequency water pump, a higher priority level is given to the variable frequency water pumps that frequently fail or are known to have leakage hazards. By dividing the multiple variable frequency water pumps into different priority levels, it is convenient to perform leakage detection on the variable frequency water pumps in descending priority levels. By setting different detection times for the variable frequency water pumps of each priority level, it is ensured that the variable frequency water pumps of high priority level are given priority.

[0043] Another aspect of the present application provides a variable frequency water pump leakage detection system, the system comprising:

[0044] The acquisition module is used to acquire the voltage change value, current change value and insulation resistance change value of the variable frequency water pump;

[0045] A first setting module, used to set a first safety threshold, a second safety threshold and a third safety threshold;

[0046] The first judgment module is used to judge whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump fails, and the second judgment module is executed;

[0047] The second judgment module is used to judge whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has leakage; if not, it means that the variable frequency water pump has no leakage.

[0048] A variable frequency water pump leakage detection system of the present scheme realizes leakage detection of the variable frequency water pump through the cooperation of the acquisition module, the first setting module, the first judgment module and the second judgment module. In the present scheme, the voltage and current changes of the variable frequency water pump are firstly used to preliminarily judge whether the variable frequency water pump is operating normally, and then when an abnormality is found, the insulation resistance of the variable frequency water pump is further changed to detect whether the variable frequency water pump is leaking, which can reduce the blindness of fault diagnosis. This method of detecting whether the variable frequency water pump is leaking through multiple dimensions can avoid the problem of false alarm or omission caused by judging only by a single parameter, thereby improving the accuracy and comprehensiveness of leakage detection of the variable frequency water pump.

[0049] Preferably, the first judgment module includes:

[0050] The first selection submodule is used to determine whether the variable frequency water pump is operating normally by first comparing whether the voltage change value is greater than a first safety threshold when it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle;

[0051] The second selection submodule is used to determine whether the variable frequency water pump is operating normally by first comparing whether the current change value is greater than a second safety threshold when it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle;

[0052] The third selection submodule is used to determine whether the variable frequency water pump is operating normally by comparing whether any one of the voltage change value or the current change value is greater than its corresponding safety threshold when the voltage and current of the variable frequency water pump are in a relatively stable state.

[0053] In this embodiment, in the first selection submodule, a significant change in voltage may directly affect the motor performance and operating stability of the variable frequency water pump. In contrast, the current fluctuation is relatively gentle, indicating that the load of the motor of the variable frequency water pump does not change much, or at least the change in current is not the main problem at present. Therefore, the voltage change value can be preferentially selected to determine whether the variable frequency water pump is operating normally. In the second selection submodule, a significant change in current means that the load or operating state of the motor has changed significantly. In contrast, the voltage fluctuation is relatively gentle, indicating that at least the change in voltage is not the main problem at present. Therefore, the current change value can be preferentially selected to determine whether the variable frequency water pump is operating normally. In the third selection submodule, the voltage and current of the variable frequency water pump are relatively stable, which means that the operating environment of the water pump is good and the motor performance is stable. Therefore, any one of the current change value or the voltage change value can be selected for monitoring, and as long as its value is within the safe range, the water pump can be considered to be operating normally.

[0054] Preferably, it also includes a trigger module and a generation module, wherein the trigger module is used to trigger the leakage protection mechanism task, and the generation module is used to generate a leakage alarm signal; when it is determined that the variable frequency water pump has leakage, the trigger module and the generation module are executed. In this embodiment, after it is determined that the variable frequency water pump has leakage, by executing the trigger and the generation modules, it is convenient for the staff to take timely measures to prevent the occurrence of safety accidents, thereby enhancing the safety of the variable frequency water pump during use.

[0055] Preferably, a recording module is further included, and the recording module is used to record the current voltage value, current value and insulation resistance value of the variable frequency water pump; when it is judged that the variable frequency water pump is operating normally or no leakage occurs, the recording module is executed. In this embodiment, after it is judged that the variable frequency water pump is operating normally or no leakage occurs, by executing the recording module, the current voltage value, current value and insulation resistance value of the variable frequency water pump are used as reference values ​​for subsequent detection, so as to perform long-term performance monitoring and preventive maintenance.

[0056] Preferably, it also includes a division module and a second setting module, wherein the division module is used to divide a number of variable frequency water pumps into different priority levels, and the second setting module is used to set different detection times for variable frequency water pumps of each priority level; when leakage detection of a number of variable frequency water pumps is required, the division module and the second setting module are executed. In this embodiment, by executing the division module, it is convenient to perform leakage detection on the variable frequency water pumps in descending priority levels. By executing the second setting module, it is ensured that variable frequency water pumps of high priority levels are given priority.

[0057] In addition, each functional unit in each embodiment of the present invention may be integrated into a processing module, or each unit may exist physically separately, or two or more units may be integrated into one module. The above-mentioned integrated module may be implemented in the form of hardware or in the form of a software functional module. If the integrated module is implemented in the form of a software functional module and sold or used as an independent product, it may also be stored in a computer-readable storage medium.

[0058] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A variable frequency water pump leakage detection method, characterized in that: The following steps are involved: Step S1: collecting the voltage change value, current change value and insulation resistance change value of the variable frequency water pump; Step S2: setting a first safety threshold, a second safety threshold and a third safety threshold; Step S3: Determine whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump has a fault, and determine whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has a leakage; if not, it means that the variable frequency water pump has no leakage.

2. A variable frequency water pump leakage detection method according to claim 1, characterized in that: In step S3, in the process of judging whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold, the following sub-steps are specifically included: When it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle, it is preferred to judge whether the variable frequency water pump is operating normally by comparing whether the voltage change value is greater than the first safety threshold; when it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle, it is preferred to judge whether the variable frequency water pump is operating normally by comparing whether the current change value is greater than the second safety threshold; when the voltage and current of the variable frequency water pump are in a relatively stable state, it is judged whether the variable frequency water pump is operating normally by comparing whether any one of the voltage change value or the current change value is greater than the corresponding safety threshold.

3. A variable frequency water pump leakage detection method according to claim 1, characterized in that: The following steps are also included: When it is determined that the variable frequency water pump has leakage, the leakage protection mechanism task is triggered and a leakage alarm signal is generated.

4. A variable frequency water pump leakage detection method according to claim 1, characterized in that: The following steps are also included: When it is determined that the variable frequency water pump is operating normally or no leakage occurs, the current voltage value, current value and insulation resistance value of the variable frequency water pump are recorded.

5. A variable frequency water pump leakage detection method according to claim 1, characterized in that: The following steps are also included: When leakage detection is required for a number of variable frequency water pumps, the variable frequency water pumps are divided into different priority levels, and different detection times are set for the variable frequency water pumps of each priority level.

6. A variable frequency water pump leakage detection system, using the variable frequency water pump leakage detection method according to any one of claims 1 to 5, characterized in that: The system comprises: The acquisition module is used to acquire the voltage change value, current change value and insulation resistance change value of the variable frequency water pump; A first setting module, used to set a first safety threshold, a second safety threshold and a third safety threshold; The first judgment module is used to judge whether the voltage change value of the variable frequency water pump is greater than the first safety threshold, or whether the current change value of the variable frequency water pump is greater than the second safety threshold. If not, it means that the variable frequency water pump is operating normally; if so, it means that the variable frequency water pump is faulty, and the second judgment module is executed; The second judgment module is used to judge whether the insulation resistance change value of the variable frequency water pump is less than the third safety threshold. If so, it means that the variable frequency water pump has leakage; if not, it means that the variable frequency water pump has no leakage.

7. A variable frequency water pump leakage detection system according to claim 6, characterized in that: The first judgment module includes: The first selection submodule is used to determine whether the variable frequency water pump is operating normally by first comparing whether the voltage change value is greater than a first safety threshold when it is detected that the voltage fluctuation of the variable frequency water pump is large and the current fluctuation is relatively gentle; The second selection submodule is used to determine whether the variable frequency water pump is operating normally by first comparing whether the current change value is greater than a second safety threshold when it is detected that the current fluctuation of the variable frequency water pump is large and the voltage fluctuation is relatively gentle; The third selection submodule is used to determine whether the variable frequency water pump is operating normally by comparing whether any one of the voltage change value or the current change value is greater than its corresponding safety threshold when the voltage and current of the variable frequency water pump are in a relatively stable state.

8. A variable frequency water pump leakage detection system according to claim 6, characterized in that: It also includes a trigger module and a generation module, wherein the trigger module is used to trigger the leakage protection mechanism task, and the generation module is used to generate a leakage alarm signal; When it is determined that the variable frequency water pump has a leakage, the trigger module and the generation module are executed.

9. A variable frequency water pump leakage detection system according to claim 6, characterized in that: It also includes a recording module, which is used to record the voltage value, current value and insulation resistance value of the current variable frequency water pump; When it is determined that the variable frequency water pump operates normally or has no leakage, the recording module is executed.

10. A variable frequency water pump leakage detection system according to claim 6, characterized in that: It also includes a division module and a second setting module, wherein the division module is used to divide a plurality of variable frequency water pumps into different priority levels, and the second setting module is used to set different detection times for the variable frequency water pumps of each priority level; When leakage detection is required for a number of variable frequency water pumps, the division module and the second setting module are executed.

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