Water pump steering control method

Abstract

The invention relates to a water pump steering control method, which relates to the technical field of water pump control, and comprises the following steps: step 100, acquiring a starting current value in response to a preset detection signal; 101, comparing the starting current value with a preset rated current after a preset interval time to obtain a current difference value; step 102, outputting a preset normal starting signal when the current difference value falls into a preset reasonable deviation range; and 103, when the current difference value does not fall into the reasonable deviation range, the water pump is controlled to execute preset steering operation. The method has the advantages that the current value within a certain time is collected, if the motor rotates reversely, the starting current is obviously smaller than the full-load current, the difference between the starting current and the full-load current is obvious, the current value in the parameters of the frequency converter is set, steering judgment is more accurate, and the objectivity and intuition of steering judgment are improved.

Description

Technical Field

[0001] The invention relates to the field of water pump control technology, and in particular to a water pump steering control method. Background Art

[0002] Water pump is a common fluid conveying equipment, widely used in industry, agriculture, municipal administration, construction and other fields.

[0003] A water pump is a mechanical device used to transport liquids (such as water, oil, chemical liquids, etc.) or pressurize liquids. It uses mechanical energy to pump liquids from low to high, or transport them from low-pressure areas to high-pressure areas, thereby achieving liquid transportation and distribution. A centrifugal pump uses the centrifugal force generated by the high-speed rotation of the impeller to transport liquids. When the impeller rotates, the liquid is thrown to the edge of the impeller under the action of centrifugal force, and after entering the volute, the speed decreases and the pressure increases, thereby achieving liquid transportation. The flow rate and head of a centrifugal pump can be adjusted by adjusting parameters such as the impeller diameter and speed.

[0004] Regarding the above-mentioned related technologies, the direction of the water pump is a relatively important content, which involves the performance of the water pump. If the direction is wrong, the performance parameters such as the flow rate and head of the water pump may not meet the design requirements. However, it is not obvious whether the direction is correct. Users cannot make an objective judgment instantly. The judgment is subjective and can easily lead to misjudgment. Summary of the invention

[0005] In order to improve the current situation that it is not obvious whether the steering is correct, the user cannot make an objective judgment instantly, the judgment is subjective, and it is easy to cause misjudgment, the present invention provides a water pump steering control method, which adopts the following technical solution: A water pump steering control method, comprising: Step 100: In response to a preset detection signal, collecting a starting current value; Step 101: After a preset interval time, compare the starting current value with the preset rated current to obtain a current difference; Step 102: outputting a preset normal start signal when the current difference falls within a preset reasonable deviation range; Step 103: When the current difference does not fall within a reasonable deviation range, control the water pump to perform a preset steering operation.

[0006] By adopting the above technical solution and collecting the current value within a certain period of time, if the motor reverses, the starting current will be significantly smaller than the full-load current, and the difference between the two values ​​is quite obvious. By setting the current value in the inverter parameters, the steering judgment is more accurate, which improves the objectivity and intuitiveness of the steering judgment.

[0007] Optionally, before step 100, the following steps are further included: Step 200: Collect the pump number before collecting the starting current value; Step 201: Confirm the rated current based on the pump number; Step 202: Find the corresponding reasonable deviation range and interval time from the preset parameter database based on the pump number.

[0008] Optionally, it also includes a method of still outputting a normal start signal when the current difference does not fall within the reasonable deviation range. This method includes: Step 300: When the current difference does not fall within the reasonable deviation range, re - execute steps 100 to 101; Step 301: Define the current difference after re - executing steps 100 to 101 as the verified current difference; Step 302: Output a normal start signal when the verified current difference falls within the reasonable deviation range; Step 303: When the verified current difference does not fall within the reasonable deviation range, control the pump to perform a steering operation and re - execute steps 100 to 101; Step 304: Define the current difference after re - executing steps 100 to 101 after controlling the pump to perform a steering operation as the reverse current difference, and define the corresponding starting current value as the reverse starting current value; Step 305: Output a preset pump abnormal signal when the reverse current difference does not fall within the reasonable deviation range; Step 306: Maintain the current state of the pump when the reverse current difference falls within the reasonable deviation range.

[0009] By adopting the above - mentioned technical solution, repeated collection combined with reverse detection is used to judge whether it is an external sudden abnormal situation or its own pump problem that causes data detection problems, improving the accuracy of detection.

[0010] Optionally, the method of controlling the pump to perform a steering operation when the verified current difference does not fall within the reasonable deviation range includes: Step 400: Calculate the deviation degree based on the current difference, reasonable deviation range and preset unit deviation value; Step 401: Calculate the verified deviation degree based on the verified current difference, reasonable deviation range and unit deviation value; Step 402: When the verified deviation degree is less than the deviation degree, continue to re - execute steps 100 - 101 and update the verified current difference; Step 403: Control the pump to perform a steering operation when the verified deviation degree is greater than the deviation degree and the verified current difference does not fall within the reasonable deviation range.

[0011] By adopting the above technical solution, if the process of re - acquisition continuously approaches the reasonable range, it indicates that it may still be within the range of abnormal emergencies this time. Therefore, the acquisition is still repeated until the data range is similar to or exceeds the original range. At this time, the final result can be determined, further improving the accuracy of detection.

[0012] Optionally, the method of re - executing steps 100 to 101 includes: Step 500: Collect the pump speed and pump temperature; Step 501: When the pump speed is less than the preset non - influencing speed critical value and the pump temperature is less than the preset non - influencing temperature critical value, re - execute steps 100 to 101; Step 502: When the pump speed is greater than the non - influencing speed critical value or the pump temperature is greater than the influencing temperature critical value, continue to wait until the pump speed is less than the non - influencing speed critical value and the pump temperature is less than the non - influencing temperature critical value.

[0013] By adopting the above technical solution, before repeating the acquisition, the pump needs to be restored to the initial state to prevent the parameter changes generated when the previous operation has not completely stopped from affecting the subsequent repeated acquisition process, improving the accuracy of repeated acquisition.

[0014] Optionally, there is also a method of re - executing steps 100 to 101 when the pump temperature is less than the influencing temperature critical value but the pump speed is greater than the non - influencing speed critical value. This method includes: Step 600: After the pump speed is greater than the non - influencing speed critical value, determine whether to control the pump to perform a steering operation; Step 601: When the pump performs a steering operation, find the corresponding steering delay time from the preset recovery database based on the pump speed; Step 602: Extend the interval time based on the steering delay time; Step 603: When the pump does not perform a steering operation, find the corresponding time - saving value from the preset time - reduction database based on the pump speed; Step 604: Narrow the interval time based on the time - saving value.

[0015] By adopting the above technical solution, the interval time can also be slightly modified directly to keep it consistent in the subsequent process without the pump being restored to the initial state, saving a lot of time.

[0016] Optionally, after outputting the pump abnormal signal when the reverse - current difference does not fall within the reasonable deviation range, it further includes: Step 700: Receive the human - processing type; Step 701: When the human - processing type is the preset maintenance type, do not perform any operation; Step 702: Receive an adjustment number when the manual processing type is a preset replacement type; Step 703: Find the corresponding adjustment parameter database and adjustment rated current from the preset water pump database based on the adjustment number; Step 704: Replace the rated current with the adjustment rated current and replace the parameter database with the adjustment parameter database; Step 705: When the manual processing type is a preset non-operation type, update the reasonable deviation range based on the reverse current difference and the current difference, and update it to the parameter database, and update the rated current based on the starting current value and the reverse starting current value.

[0017] By adopting the above technical solution, after the alarm is output, the user will process the water pump and transmit the processing result back. Different processing results adopt different means. Especially when the processing result is a non-processing result, it indicates that the water pump has no problem at this time. Then it means that there is a problem with the rationality of the data deviation range. Then expand the rationality to provide the correct rotation direction of the water pump.

[0018] Optionally, when the manual processing type is a non-operation type, the method for updating the reasonable deviation range based on the reverse current difference and the current difference and updating it to the parameter database and updating the rated current based on the starting current value and the reverse starting current value includes: Step 800: Define the updated parameter database as the updated parameter database and define the corresponding rated current as the updated rated current; Step 801: Determine other water pump numbers based on the water pump number and the preset water pump number group; Step 802: Find the corresponding other parameter database and other rated current from the water pump database based on the other water pump numbers; Step 803: When the other parameter database matches the updated parameter database and the other rated current matches the updated rated current, define the corresponding other water pump number as the actual water pump number and output it in combination with the preset inquiry signal; Step 804: Find the corresponding actual parameter database and actual rated current from the water pump database based on the actual water pump number when receiving the preset confirmation signal; Step 805: Replace the rated current with the actual rated current and replace the parameter database with the actual parameter database; Step 806: When receiving the preset denial signal, update the reasonable deviation range based on the reverse current difference and the current difference, and update it to the parameter database, and update the rated current based on the starting current value and the reverse starting current value.

[0019] By adopting the above technical solution, one of the processing solutions is to replace the water pump. However, before replacement, the current water pump model will be output to facilitate the processing personnel to replace the same water pump as much as possible, reduce the overall system update work after replacing with different types of water pumps, and directly use the previous data for subsequent data processing, improving the efficiency of system data update.

[0020] Optionally, the method for receiving an adjustment number when the manual processing type is a replacement type includes: Step 900: If the manual processing type is a replacement type, output the water pump number before receiving the adjustment number; Step 901: Do not perform any operation when the adjustment number is the same as the water pump number; Step 902: When the adjustment number is different from the water pump number, execute Steps 703 to 704.

[0021] By adopting the above technical solution, if the model of the current water pump meets the requirements of the staff, the current water pump number is directly output. If it does not meet the requirements, then select the number of the water pump that best meets the requirements, making the output of the water pump number more user-friendly.

[0022] Optionally, the method for outputting the water pump number before receiving the adjustment number includes: Step 1000: Retrieve the historical adjustment number and the corresponding historical water pump number; Step 1001: Accumulate the historical maintenance times when the historical adjustment number is the same as the historical water pump number; Step 1002: Do not count when the historical adjustment number is different from the historical water pump number; Step 1003: Match the water pump number with the historical water pump number to obtain the historical maintenance times corresponding to the water pump number, and define this historical maintenance times as the maintenance times; Step 1004: Output the water pump number when the maintenance times are greater than the preset preferred critical times; Step 1005: When the maintenance times are less than the preferred critical times, screen the historical water pump number with the most historical maintenance times, and define this historical water pump number as the preferred water pump number; Step 1006: Output the preferred water pump number as the water pump number.

[0023] In summary, the present invention includes at least one of the following beneficial technical effects: By collecting the current values within a certain period of time, if the motor rotates in reverse, the starting current will be significantly less than the full-load current, and the numerical difference between the two is relatively obvious. Set the current value in the frequency converter parameters to make the steering judgment more accurate, improving the objectivity and intuitiveness of the steering judgment; Repeated acquisition combined with reverse detection is used to determine whether it is an external sudden abnormal situation or a problem with the self-water pump that causes data detection problems, improving the accuracy of detection; Different processing results adopt different means. Especially when the processing result is not to process, it indicates that the water pump has no problem at this time, which means that there is a problem with the rationality of the data deviation range. Then, the rationality is expanded to provide the correct rotation direction of the water pump. Description of the Drawings

[0024] Figure 1 It is a flowchart of a water pump rotation control method in an embodiment of the present application.

[0025] Figure 2 It is a flowchart of a method for still outputting a normal start signal when the current difference does not fall within the reasonable deviation range in an embodiment of the present application.

[0026] Figure 3 It is a flowchart of a method for controlling the water pump to perform a rotation operation when the verified current difference does not fall within the reasonable deviation range in an embodiment of the present application.

[0027] Figure 4 It is a flowchart of a method for re-executing step 100 to step 101 in an embodiment of the present application.

[0028] Figure 5 It is a flowchart of a method for still re-executing step 100 to step 101 when the water pump temperature is less than the influence temperature critical value but the water pump speed is greater than the non-influence speed critical value in an embodiment of the present application.

[0029] Figure 6 It is a flowchart of a method after outputting a water pump abnormal signal when the reverse current difference does not fall within the reasonable deviation range in an embodiment of the present application.

[0030] Figure 7 It is a flowchart of a method for updating the reasonable deviation range based on the reverse current difference and the current difference and updating it to the parameter database, and updating the rated current based on the starting current value and the reverse starting current value when the manual processing type is the non-operation type in an embodiment of the present application.

[0031] Figure 8 It is a flowchart of a method for receiving an adjustment number when the manual processing type is the replacement type in an embodiment of the present application.

[0032] Figure 9 It is a flowchart of a method for outputting a water pump number before receiving the adjustment number in an embodiment of the present application. Detailed Embodiment

[0033] The present invention will be further described in detail below in conjunction with the drawings and embodiments.

[0034] An embodiment of the present invention discloses a method for controlling the rotation direction of a water pump. Refer to Figure 1 , a method for controlling the rotation direction of a water pump includes: Step 200: Collect the water pump number.

[0035] The water pump number is the number of the water pump, which can also be the number of the water pump model here. The collection method can be either by reading the nameplate after installation or by manually inputting the number corresponding to the model in the corresponding system.

[0036] Step 201: Confirm the rated current based on the water pump number.

[0037] The rated current is the maximum current value at which the water pump can operate safely for a long time. The confirmation method can be either by reading from the nameplate or by searching through the parameter database in Step 202, which will be introduced in the subsequent process and will not be elaborated here.

[0038] Step 202: Find the corresponding reasonable deviation range and interval time from the preset parameter database based on the water pump number.

[0039] The reasonable deviation range is the range of deviation that is still within the requirements because when the system starts, the current rises from 0 to the rated current, and this process may cause the current to not reach the rated current or exceed the rated current at a certain time due to the speed of startup. The interval time is the time required for the current to reach the rated current when the system starts. The database stores the mapping relationship between the water pump number, the reasonable deviation range, and the interval time. The staff in this field determines the test data for each time according to the water pump type corresponding to each water pump number, and then conducts tests. The test data is the time required to reach the rated current and the change curve of the current and time during this period. Then, the interval time is obtained based on the average value, and the range is set according to the magnitude of the current at the position of the average value. When the system receives the water pump number, it automatically searches the database for the corresponding reasonable deviation range and interval time and outputs them.

[0040] Step 100: In response to a preset detection signal, collect the starting current value.

[0041] The detection signal is a signal for detecting the rotation direction of the water pump, which is also equivalent to the signal for starting this system here. It can be triggered in the form of a button. The starting current value is the current value that gradually rises after the detection signal is triggered.

[0042] Step 101: Compare the starting current value with the preset rated current after a preset interval time to obtain a current difference.

[0043] The current difference is the gap between the starting current value after the interval time and the rated current. The comparison method is to subtract the rated current from the starting current value.

[0044] Step 102: Output a preset normal start signal when the current difference falls within a preset reasonable deviation range.

[0045] The normal start signal is a signal indicating that the running direction of the water pump is correct and it starts normally. The output method can be in the form of a signal lamp reminder, for example: a green light. When the current difference falls within the reasonable deviation range, it indicates a normal start, and then the normal start signal is output.

[0046] Step 103: Control the water pump to perform a preset steering operation when the current difference does not fall within the reasonable deviation range.

[0047] The steering operation is an operation for the motor to reverse.

[0048] When the current difference does not fall within the reasonable deviation range, it indicates that the starting current rises and is significantly less than the rated current. Therefore, it indicates that the motor is rotating in reverse at this time, and then the water pump is controlled to perform the steering operation.

[0049] Here, during the forward and reverse rotations, the current values have a relatively obvious difference. Therefore, it is possible to judge whether the rotation is normal according to the current change characteristics.

[0050] Refer to Figure 2 , and it also includes a method of still outputting a normal start signal when the current difference does not fall within the reasonable deviation range. This method includes: Step 300: When the current difference does not fall within the reasonable deviation range, re - execute Steps 100 to 101.

[0051] The purpose of re - executing Steps 100 to 101 is to check whether the situation where the current difference does not fall within the reasonable deviation range is a temporary and sudden occurrence, and actually it is still a normal rotation.

[0052] Step 301: Define the current difference after re - executing Steps 100 to 101 as the verified current difference.

[0053] Step 302: Output a normal start signal when the verified current difference falls within the reasonable deviation range.

[0054] When the verified current difference falls within the reasonable deviation range, it indicates that the actual situation is a temporary and sudden occurrence, and actually it is a normal rotation. Therefore, the normal start signal can still be output.

[0055] Step 303: When the verified current difference does not fall within the reasonable deviation range, control the water pump to perform the steering operation and re - execute Steps 100 to 101.

[0056] When the checked current difference does not fall within the reasonable deviation range, it indicates that restarting will not be able to fall within the reasonable deviation range either. This means that the previous steps 100 - 103 were not due to an accident. Therefore, control the water pump to perform a steering operation and then re - check.

[0057] Step 304: Define the current difference after controlling the water pump to perform a steering operation and then re - executing steps 100 to 101 as the reverse current difference, and define the corresponding starting current value as the reverse starting current value.

[0058] Step 305: Output a preset water pump abnormal signal when the reverse current difference does not fall within the reasonable deviation range.

[0059] The water pump abnormal signal is a signal indicating that there is an abnormality in the water pump itself. The output method can be a signal lamp prompt, for example: in the way of a red light flashing. When the reverse current difference does not fall within the reasonable deviation range, it means that rotation in both directions cannot meet the requirements of forward rotation, indicating that the water pump is damaged. Therefore, output the water pump abnormal signal.

[0060] Step 306: Maintain the current state of the water pump when the reverse current difference falls within the reasonable deviation range.

[0061] When the reverse current difference falls within the reasonable deviation range, it indicates that the water pump is working normally. Since the steering operation has been performed, it means that the requirements for forward rotation have been met at this time. Therefore, just maintain the current state of the water pump.

[0062] Refer to Figure 3 , the method for controlling the water pump to perform a steering operation when the checked current difference does not fall within the reasonable deviation range includes: Step 400: Calculate the deviation degree based on the current difference, the reasonable deviation range, and a preset unit deviation value.

[0063] The unit deviation value is a reference value for the degree set artificially. That is, when the deviation corresponds to this reference value, the deviation degree is 1. It is set by the staff according to the concentrated value of the deviations after multiple measurements. Since the deviation degree is only a reference, the size of the set unit deviation value does not affect the calculation of the deviation degree.

[0064] The deviation degree is the degree of the current difference from the reasonable deviation range. The calculation method is to first determine the end point of the reasonable deviation range closest to the current difference according to the current difference, and then divide the result of subtracting the value corresponding to this end point from the current difference by the unit deviation value.

[0065] Step 401: Calculate the checked deviation degree based on the checked current difference, the reasonable deviation range, and the unit deviation value.

[0066] The degree of verification deviation is the degree of the current difference from the reasonable deviation range. The calculation method is similar to that in step 400 and will not be elaborated here.

[0067] Step 402: When the degree of verification deviation is less than the deviation degree, continue to re - execute steps 100 - 101 and update the verified current difference.

[0068] When the degree of verification deviation is less than the deviation degree, it indicates that it may still be within the range of abnormal sudden situations this time but is changing in the normal direction, so the inspection can continue.

[0069] Step 403: When the degree of verification deviation is greater than the deviation degree and the verified current difference does not fall within the reasonable deviation range, control the water pump to perform a steering operation.

[0070] When the degree of verification deviation is greater than the deviation degree and the verified current difference does not fall within the reasonable deviation range, it indicates that it is impossible to be a mutation situation, so directly perform the steering operation.

[0071] Refer to Figure 4 , the method of re - executing steps 100 to 101 includes: Step 500: Collect the water pump speed and water pump temperature.

[0072] The water pump speed is the rotational speed of the impeller of the water pump. The collection method here can be obtained by reading with a speed sensor. The water pump temperature is the temperature of the motor of the water pump. The collection method here is a temperature sensor.

[0073] Step 501: When the water pump speed is less than the preset non - influencing speed critical value and the water pump temperature is less than the preset non - influencing temperature critical value, re - execute steps 100 to 101.

[0074] The non - influencing speed critical value is the critical value of the speed at which, when less than this speed, it basically does not affect the test data during subsequent restart, including data such as the current magnitude. The non - influencing temperature critical value is the critical value of the temperature at which, when less than this temperature, it does not affect the test data during subsequent restart, including data such as the current magnitude. It is obtained by the staff observing the current change curve when restarting under different speeds and temperatures. If it is basically the same as or approximate to the current change curve at 0 speed and normal temperature, then it is set as the corresponding critical value.

[0075] Step 502: When the water pump speed is greater than the non - influencing speed critical value or the water pump temperature is greater than the influencing temperature critical value, continue to wait until the water pump speed is less than the non - influencing speed critical value and the water pump temperature is less than the non - influencing temperature critical value.

[0076] When the pump speed is greater than the non - impact speed critical value or the pump temperature is greater than the impact temperature critical value, it indicates that if starting directly at this time, it will affect the test results of subsequent re - execution of steps 100 to 101. Therefore, wait until both conditions are met.

[0077] Refer to Figure 5 , it also includes a method of re - executing steps 100 to 101 when the pump temperature is less than the impact temperature critical value but the pump speed is greater than the non - impact speed critical value. This method includes: Step 600: After the pump speed is greater than the non - impact speed critical value, determine whether to control the pump to perform a steering operation.

[0078] Step 601: When the pump performs a steering operation, based on the pump speed, find the corresponding steering delay time from a preset recovery database.

[0079] The steering delay time is the time required for the pump to reach the rated current at the interval time if the motor is working normally. Due to the steering, the pump needs to go from the pump speed to zero speed first, and then from zero speed to the standard speed (the speed corresponding to the rated current). The database stores the mapping relationship between the pump speed, the steering operation, and the steering delay time. By the staff in the field, at each pump speed, perform the steering operation, and then observe and record the time required to reach the rated current, and then subtract the set interval time to obtain it. When the system receives the pump speed, it automatically finds the corresponding steering delay time from the database and outputs it.

[0080] Here, it should be noted that if there is no record of the pump speed, then wait for a period of time until the recorded pump speed is reached, and then immediately perform the steering operation.

[0081] Step 602: Extend the interval time based on the steering delay time.

[0082] After the extension, the current interval time is equal to the original interval time plus the steering delay time. It should be noted that this is only an extension for this time, and in subsequent processes, the set interval time will still be output unless there are situations such as steps 500 to 502.

[0083] Step 603: When the pump does not perform a steering operation, based on the pump speed, find the corresponding time - saving value from a preset time - reduction database.

[0084] The time saved is the time saved when the motor is working properly, and the rated current can be reached during the interval time. Due to a certain rotational speed, the water pump does not need to reach the standard rotational speed (the rotational speed corresponding to the rated current) from zero rotational speed. The mapping relationship between the rotational speed of the water pump and the saved time is stored in the database. It is recorded by the staff in this field by observing the time required to reach the rated current at each rotational speed of the water pump, and then obtained by subtracting the interval time. When the system receives the rotational speed of the water pump, it automatically searches the database for the corresponding saved time and outputs it.

[0085] Here, it should be noted that if there is no record of the rotational speed of the water pump, it will wait for a period of time until the rotational speed of the water pump with a record is reached, and then the saved time and the acquisition time will be output from this moment.

[0086] Step 604: Narrow the interval time based on the saved time.

[0087] After narrowing, the current interval time is equal to the original interval time minus the saved time. It should be noted that only this time is narrowed, and in subsequent processes, the output will still be carried out according to the set interval time, unless there are situations such as steps 500 to 502.

[0088] Refer to Figure 6 , after outputting the water pump abnormal signal when the reverse current difference does not fall within the reasonable deviation range, it further includes: Step 700: Receive the human processing type.

[0089] The human processing type is the processing type for the staff to process the water pump after outputting the water pump abnormal signal. The receiving method here can be for the human to input the corresponding processing type in the system, for example: pressing the button corresponding to the processing type.

[0090] Step 701: Do not operate when the human processing type is the preset maintenance type.

[0091] The maintenance type is the type for the staff to repair the water pump. If the human processing type is the maintenance type, it means that the water pump is still the original water pump, the water pump number remains unchanged, and the internal structure has returned to the original state. The rated current, reasonable deviation range, and interval time can still be output in the manner of steps 200 to 202.

[0092] Step 702: Receive the adjustment number when the human processing type is the preset replacement type.

[0093] The replacement type is that the water pump cannot be repaired and has been replaced with another water pump processing type. Adjust the number to the number of the replaced water pump. The receiving method is manual input. When the manual processing type is the replacement type, the system automatically pops up the question "What is the number of the replaced water pump?" and outputs the dialogue line for filling. The user can input the corresponding number in the dialogue line.

[0094] If the manual processing type is the replacement type, it means that the water pump has been replaced, so it is necessary to know the number of the replaced water pump.

[0095] Step 703: Based on the adjusted number, find the corresponding adjusted parameter database and adjusted rated current from the preset water pump database.

[0096] The adjusted parameter database is the parameter database corresponding to the adjusted number. The adjusted rated current is the rated current corresponding to the adjusted number. The mapping relationship between the adjusted number, the adjusted parameter database, and the adjusted rated current is stored in the database. The staff numbers each type of water pump, then determines the adjusted rated current in the way of 201, and forms the adjusted parameter database in the way of step 202 and then makes one-to-one correspondence to obtain. When the system receives the corresponding adjusted number, it automatically finds the corresponding adjusted parameter database and adjusted rated current from the database and outputs them.

[0097] Step 704: Replace the rated current with the adjusted rated current and replace the parameter database with the adjusted parameter database.

[0098] After replacement, the rated current and the parameter database in the method for judging the forward and reverse directions of the water pump are corresponding.

[0099] Step 705: When the manual processing type is the preset non-operation type, update the reasonable deviation range based on the reverse current difference and the current difference, and update it to the parameter database, and update the rated current based on the starting current value and the reverse starting current value.

[0100] The non-operation type means that the water pump is not damaged and is a type of normal operation. When the manual processing type is the preset non-operation type, it means that the water pump is normal, so the originally set reasonable deviation range and rated current are unreasonable. Therefore, update the reasonable deviation range based on the reverse current difference and the current difference, and update it to the parameter database, and update the rated current based on the starting current value and the reverse starting current value.

[0101] The update method is as follows: Select the one with a smaller distance from the reasonable deviation range among the reverse current difference and the current difference, and then use it as one end point of the updated reasonable deviation range, while the other end point is the negative value of the selected end point. Similarly, select the one closer to the rated current among the starting current value and the reverse starting current value, and then use it as the updated rated current.

[0102] Here, the numerical values of the two endpoints of the reasonable deviation range are in a positive and negative relationship, but the absolute values are the same.

[0103] Refer to Figure 7 , when the artificial processing type is the non-operation type, the reasonable deviation range is updated based on the reverse current difference and the current difference, and is updated to the parameter database. The method for updating the rated current based on the starting current value and the reverse starting current value includes: Step 800: Define the updated parameter database as the updated parameter database, and define the corresponding rated current as the updated rated current.

[0104] Step 801: Determine other pump numbers based on the pump number and the preset pump number group.

[0105] The pump number group is a group formed by all pump numbers, and all pump types in the current system application scenario are stored in this pump number group. Other pump numbers are the numbers of pumps other than the pump number. The determination method is that after removing the pump number from the pump number group, the remaining numbers are the other pump numbers.

[0106] Step 802: Find the corresponding other parameter database and other rated current from the pump database based on the other pump numbers.

[0107] The other parameter database is the parameter database corresponding to the other pump numbers. The other rated current is the rated current of the pump corresponding to the other pump numbers. The establishment of the database was introduced in the previous step 703 and will not be elaborated here. When the system receives the other pump numbers, it automatically searches the database for the corresponding other parameter database and other rated current and outputs them.

[0108] Step 803: When the other parameter database matches the updated parameter database and the other rated current matches the updated rated current, define the corresponding other pump number as the actual pump number and output it in combination with the preset inquiry signal.

[0109] The inquiry signal is a signal for asking the staff whether it is the actual pump number. Here, it can be output in text form. For example, if the actual pump number is "5", the output question is "Is the number of the pump actually working now 5?".

[0110] When the other parameter database matches the updated parameter database and the other rated current matches the updated rated current, it indicates that there may be a reason for incorrect input of the pump number. Therefore, at this time, ask the staff to confirm.

[0111] Step 804: When receiving a preset confirmation signal, search for the corresponding actual parameter database and actual rated current from the water pump database based on the actual water pump number.

[0112] The confirmation signal is a signal for the user to confirm that the current actual water pump number is the actual water pump number. The receiving method here can be the way of manually pressing the corresponding button.

[0113] The actual parameter database is the parameter database corresponding to the actual water pump number. The actual rated current is the rated current of the water pump corresponding to the actual water pump number. The establishment of the database was introduced in the previous step 703 and will not be elaborated here. When the system receives the actual water pump number, it automatically searches for the corresponding actual parameter database and actual rated current from the database for output.

[0114] Step 805: Replace the rated current with the actual rated current and replace the parameter database with the actual parameter database.

[0115] Step 806: When receiving a preset denial signal, update the reasonable deviation range based on the reverse current difference and current difference, and update it to the parameter database, and update the rated current based on the starting current value and reverse starting current value.

[0116] The denial signal is a signal for the user to deny that the current actual water pump number is the actual water pump number. The receiving method here can be the way of manually pressing the corresponding button.

[0117] When receiving the preset denial signal, it indicates that although the parameter database and rated current are the same, the types are still different, so it is processed in the way of step 705.

[0118] Refer to Figure 8 , when the manual processing type is the replacement type, the method for receiving the adjusted number includes: Step 900: If the manual processing type is the replacement type, output the water pump number before receiving the adjusted number.

[0119] Here, the purpose of outputting the water pump number is to hope that the staff can still replace it with the accustomed water pump type when replacing, reduce abnormal situations after replacing different water pumps, and it is also convenient for historical data to still be referential if there is historical data stored because the water pumps are the same.

[0120] Step 901: Do not perform any operation when the adjusted number is the same as the water pump number.

[0121] When the adjusted number is the same as the water pump number, it means that the database does not need to be changed at this time, which is equivalent to performing a maintenance operation and reducing the process of data update.

[0122] Step 902: When the adjustment number is inconsistent with the pump number, execute Steps 703 to 704.

[0123] Refer to Figure 9 , a method for outputting a pump number before receiving an adjustment number includes: Step 1000: Retrieve the historical adjustment number and the corresponding historical pump number.

[0124] The historical adjustment number is the number of the pump replaced during the historical process after the pump is replaced. The historical pump number is the number of the pump replaced during the historical process before the pump is replaced.

[0125] Step 1001: When the historical adjustment number is the same as the historical pump number, accumulate the historical maintenance times.

[0126] The historical maintenance times is the number of times the historical adjustment number is the same as the historical pump number, which is calculated by accumulation. Here, the historical maintenance times refers to the number of times corresponding to a historical pump number, rather than the combined number of all historical pump numbers.

[0127] Step 1002: Do not count when the historical adjustment number is different from the historical pump number.

[0128] When the historical adjustment number is different from the historical pump number, it means that the pump has been replaced at this time, so no counting is performed.

[0129] Step 1003: Match the pump number with the historical pump number to obtain the historical maintenance times corresponding to the pump number, and define this historical maintenance times as the maintenance times.

[0130] The matching method is digital matching. If the numbers are the same, the matching is successful.

[0131] Step 1004: Output the pump number when the maintenance times is greater than the preset preferred critical times.

[0132] The preferred critical times is the number of times that if exceeded, it means that this pump model is very suitable for this environment, which is a relatively preferred number of times. When the maintenance times is greater than the preferred critical times, it means that the pump corresponding to the current pump number is relatively preferred and suitable for this environment, and the pump number is output in the form of a suggestion.

[0133] Step 1005: When the maintenance times is less than the preferred critical times, screen the historical pump number with the most historical maintenance times, and define this historical pump number as the preferred pump number.

[0134] When the maintenance times is less than the preferred critical times, it means that the pump number before replacement is not very preferred at present, and it may not have become the preferred pump yet. Then, a relatively preferred pump is output.

[0135] Step 1006: Output the preferred water pump number as the water pump number.

[0136] The above are only the preferred embodiments of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the concept of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A water pump steering control method, characterized in that: include: Step 100: In response to a preset detection signal, collecting a starting current value; Step 101: After a preset interval time, compare the starting current value with a preset rated current to obtain a current difference; Step 102: outputting a preset normal start signal when the current difference falls within a preset reasonable deviation range; Step 103: When the current difference does not fall within the reasonable deviation range, control the water pump to perform a preset steering operation.

2. A water pump steering control method according to claim 1, characterized in that: Before step 100, the method further includes: Step 200: collecting the water pump number before collecting the starting current value; Step 201: extracting based on the water pump number to obtain the rated current; Step 202: searching the corresponding reasonable deviation range and the interval time from a preset parameter database based on the water pump number.

3. A water pump steering control method according to claim 2, characterized in that: Also included is a method for still outputting the normal start signal when the current difference does not fall within the reasonable deviation range, the method comprising: Step 300: re-execute steps 100 to 101 when the current difference does not fall within the reasonable deviation range; Step 301: defining the current difference after re-executing step 100 to step 101 as a verification current difference; Step 302: outputting a normal start signal when the checked current difference falls within the reasonable deviation range; Step 303: When the checked current difference does not fall within the reasonable deviation range, the water pump is controlled to perform a steering operation, and steps 100 to 101 are re-executed; Step 304: defining the current difference after the water pump is controlled to perform the steering operation and then re-performing step 100 to step 101 as a reverse current difference, and defining the corresponding starting current value as a reverse starting current value; Step 305: outputting a preset water pump abnormality signal when the reverse current difference does not fall within the reasonable deviation range; Step 306: Maintain the current state of the water pump when the reverse current difference falls within the reasonable deviation range.

4. A water pump steering control method according to claim 3, characterized in that: The method of controlling the water pump to perform a steering operation when the checked current difference does not fall within the reasonable deviation range includes: Step 400: Calculate the degree of deviation based on the current difference, the reasonable deviation range and a preset unit deviation value; Step 401: Calculating a verification deviation degree based on the verification current difference, the reasonable deviation range and the unit deviation value; Step 402: When the verification deviation degree is less than the deviation degree, continue to re-execute steps 100-101 and update the verification current difference value; Step 403: When the check deviation degree is greater than the deviation degree and the check current difference does not fall within the reasonable deviation range, control the water pump to perform a steering operation.

5. A water pump steering control method according to claim 3 or 4, characterized in that: The method of re-executing step 100 to step 101 includes: Step 500: Collecting water pump speed and water pump temperature; Step 501: when the water pump speed is less than a preset critical value that does not affect the speed and the water pump temperature is less than a preset critical value that does not affect the temperature, re-execute steps 100 to 101; Step 502: When the water pump speed is greater than the speed critical value that does not affect the speed or the water pump temperature is greater than the temperature critical value that affects the temperature, continue to wait until the water pump speed is less than the speed critical value that does not affect the speed and the water pump temperature is less than the temperature critical value that does not affect the temperature.

6. A water pump steering control method according to claim 5, characterized in that: The method further includes re-executing step 100 to step 101 when the water pump temperature is less than the critical value affecting the temperature but the water pump speed is greater than the critical value not affecting the speed, the method comprising: Step 600: after the water pump speed is greater than the critical value that does not affect the speed, determine whether to control the water pump to perform a steering operation; Step 601: when the water pump performs a steering operation, searching a corresponding steering delay time from a preset recovery database based on the water pump speed; Step 602: Extending the interval time based on the turn delay time; Step 603: when the water pump does not perform the steering operation, searching for the corresponding saving time from a preset time-lapse database based on the water pump speed; Step 604: Reduce the interval time based on the saved time.

7. A water pump steering control method according to claim 3, characterized in that: After outputting the water pump abnormality signal when the reverse current difference does not fall within the reasonable deviation range, the method further includes: Step 700: receiving a human processing type; Step 701: When the manual processing type is a preset maintenance type, no operation is performed; Step 702: receiving an adjustment number when the manual processing type is a preset replacement type; Step 703: searching a corresponding adjustment parameter database and adjusting rated current from a preset water pump database based on the adjustment number; Step 704: replacing the rated current with the adjusted rated current, and replacing the parameter database with the adjusted parameter database; Step 705: When the manual processing type is a preset non-operation type, the reasonable deviation range is updated based on the reverse current difference and the current difference, and updated to the parameter database, and the rated current is updated based on the starting current value and the reverse starting current value.

8. A water pump steering control method according to claim 7, characterized in that: When the manual processing type is a non-operation type, the reasonable deviation range is updated based on the reverse current difference and the current difference, and updated to the parameter database, and the method for updating the rated current based on the starting current value and the reverse starting current value includes: Step 800: defining the updated parameter database as an updated parameter database, and defining the corresponding rated current as an updated rated current; Step 801: Determine other water pump numbers based on the water pump number and a preset water pump number group; Step 802: searching the corresponding other parameter database and other rated current from the water pump database based on the other water pump number; Step 803: when the other parameter database matches the updated parameter database, and the other rated current matches the updated rated current, the corresponding other water pump number is defined as the actual water pump number, and outputted in combination with a preset inquiry signal; Step 804: searching the corresponding actual parameter database and actual rated current from the water pump database based on the actual water pump number when receiving a preset confirmation signal; Step 805: replacing the rated current with the actual rated current, and replacing the parameter database with the actual parameter database; Step 806: When a preset denial signal is received, the reasonable deviation range is updated based on the reverse current difference and the current difference, and updated to the parameter database, and the rated current is updated based on the starting current value and the reverse starting current value.

9. A water pump steering control method according to claim 7, characterized in that: The method for receiving the adjustment number when the manual processing type is a replacement type includes: Step 900: if the manual processing type is the replacement type, outputting the water pump number before receiving the adjustment number; Step 901: when the adjustment number and the water pump number are consistent, no operation is performed; Step 902: Execute steps 703 to 704 when the adjustment number and the water pump number are inconsistent.

10. A water pump steering control method according to claim 9, characterized in that: The method of outputting the pump number before receiving the adjustment number includes: Step 1000: Retrieve the historical adjustment number and the corresponding historical water pump number; Step 1001: accumulating the number of historical maintenance times when the historical adjustment number and the historical water pump number are the same; Step 1002: when the historical adjustment number and the historical water pump number are different, no counting is performed; Step 1003: matching the water pump number with the historical water pump number to obtain the historical maintenance times corresponding to the water pump number, and defining the historical maintenance times as the maintenance times; Step 1004: Outputting the water pump number when the maintenance times are greater than a preset optimal critical times; Step 1005: When the maintenance times are less than the preferred critical times, select the historical water pump number with the largest number of historical maintenance times, and define the historical water pump number as the preferred water pump number; Step 1006: Output the preferred water pump number as the water pump number.

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