WO2021012884A1 - Control method and apparatus for automatically emptying water pump, corresponding device, and storage medium - Google Patents

Abstract

A control method and apparatus for automatically emptying a water pump, a corresponding device, and a storage medium. The method comprises: acquiring preset operation parameter values of a water pump; determining a load operation state of the water pump according to the acquired operation parameter values; and performing operation protection on the water pump according to the determined load operation state. According to the control method and apparatus for automatically emptying a water pump, the corresponding device, and the storage medium, the load operation state of the water pump is directly determined according to the directly acquired operation parameter values of the water pump, so that the water pump operation is protected; instead of indirectly determining the load operation state of the water pump according to acquired signals such as flow rate and pressure of water flow, detection accuracy rate in the operation protection process of the water pump is effectively improved, an existing detection mode is simplified, detection costs are reduced.

Description

Control method, device corresponding equipment and storage medium for automatic emptying water pump

This disclosure claims the priority of a Chinese patent application filed with the Chinese Patent Office on July 23, 2019, the application number is 201910667957.4, and the invention title is "Automatic emptying pump control method, device corresponding equipment and storage medium", and its entire content Incorporated in this disclosure by reference.

Technical field

The present disclosure relates to the technical field of electromechanical control, and in particular, to a control method, device corresponding equipment and storage medium of an automatic emptying water pump.

Background technique

Water pumps usually work underwater, and the working environment is poor, often causing failures. Therefore, it is necessary to set a protection function for the water pump.

Related technologies generally adopt indirect collection of water flow, pressure and other signals to realize the protection functions of the water pump such as start and stop, overload, and stall. However, the detection method is complicated, the cost is high, and the detection accuracy is low, and it cannot solve the situation that water cannot be pumped when there is some air in the water pump cavity.

In view of the above technical problems in related technologies, no effective solutions have yet been proposed.

Summary of the invention

The embodiments of the present disclosure provide a control method, device corresponding equipment, and storage medium for automatically emptying a water pump, so as to at least solve at least one of the above-mentioned related technologies.

In order to solve the above technical problems, the present disclosure provides a water pump control method, the method includes:

Collect the operating parameter values of the pump;

Determine the load operating state of the water pump according to the collected operating parameter values;

According to the determined load operating state, the water pump is operated and protected.

In some embodiments, the operating protection of the water pump according to the determined load operating state includes:

When it is determined that the water pump is in a no-load operation state, stuck or locked-rotor operation state, controlling the water pump to stop operation according to the time when the water pump is in a corresponding load operation state;

When it is determined that the water pump has air, a start-stop cycle control method is adopted to control the operation of the water pump.

In some embodiments, the use of a start-stop cycle control method to control the operation of the water pump includes:

According to the preset running time and stopping time, the water pump is controlled to cyclically operate in an alternate manner of running and stopping.

In some embodiments, when the operating parameter value is the speed value of the water pump, the determining the load operating state of the water pump according to the collected operating parameter value includes:

According to the collected speed value of the water pump and the speed interval corresponding to each load operating state, the load operating state of the water pump is determined.

In some embodiments, the determining the load operation state of the water pump according to the collected water pump rotation speed value and the rotation speed interval corresponding to each load operation state includes:

When n>n1-Δn, it is determined that the water pump is in the no-load operation state;

When n1-Δn≥n>n2-Δn, it is determined that the water pump has air;

When n≤n2-n3, it is determined that the water pump is in the stuck or locked-rotor operation state;

When n2-n3<n≤n2-Δn, it is determined that the water pump is in a normal load operation state;

Wherein, the n is the collected rotational speed value of the water pump, the n1 is the pre-collected rotational speed value of the water pump in the no-load operation state, and the n2 is the pre-collected rotational speed of the water pump at rated water discharge Value, the Δn is a preset rotational speed error threshold, and the n3 is a preset rotational speed threshold.

In some embodiments, the collection of operating parameter values of the water pump includes

The water pump rotation speed value is collected through a preset water pump rotation speed detection device; the water pump rotation speed detection device is one or more of the following:

Hall sensor, reed switch and photoelectric sensor.

In some embodiments, when the operating parameter value is the operating current value of the water pump, the determining the load operating state of the water pump according to the collected operating parameter value includes:

When I<I1+ΔI, it is determined that the water pump is in the no-load operation state;

When I1+ΔI≤I<I2+ΔI, it is determined that there is air in the water pump;

When I≥I2+I3, it is determined that the water pump is in the stuck or locked-rotor operation state;

When I2+I3>I≥I2+ΔI, it is determined that the water pump is in a normal load operation state;

Wherein, the I is the collected current value of the water pump, the I1 is the pre-collected current value of the water pump in the no-load operating state, and the I2 is the pre-collected current of the water pump at the rated water discharge Value, the ΔI is a preset current error threshold, and the I3 is a preset current threshold.

To solve the above technical problems, the present disclosure also provides a water pump control device, which includes:

The collection module is set to collect the operating parameter values of the pump;

The state determination module is set to determine the load operation state of the water pump according to the collected operating parameter values;

The protection module is set to perform operation protection on the water pump according to the determined load operation state.

In some embodiments, the protection module includes:

The first protection unit is configured to control the water pump to stop operation according to the time when the water pump is in the corresponding load operation state when it is determined that the water pump is in the no-load operation state, stuck or locked-rotor operation state;

The second protection unit is configured to use a start-stop cycle control method to control the operation of the water pump when it is determined that the water pump has air.

In order to solve the above technical problem, the present disclosure further provides a device, which includes the control device of the water pump as described above.

In order to solve the above technical problems, the present disclosure provides a computer storage medium that stores a control program of a water pump, and the program can be executed by at least one processor to realize the operation of the water pump as described in any one of the above Control method steps.

The application of the technical solution of the present disclosure realizes the direct determination of the load operation status of the pump based on the direct collection of the operating parameter values of the pump, and then the operation protection of the pump, instead of indirectly determining the load of the pump based on the collection of water flow, pressure and other signals The operation status effectively improves the detection accuracy during the operation and protection of the pump, effectively simplifies the existing detection method, and effectively reduces the detection cost.

Description of the drawings

Fig. 1 is a flowchart of a control method for automatically emptying a water pump according to an embodiment of the present disclosure;

Figure 2 is a schematic structural diagram of a submersible pump according to an embodiment of the present disclosure;

Figure 3 is a flowchart of a control method for optionally automatically emptying a water pump according to an embodiment of the present disclosure;

Fig. 4 is a schematic structural diagram of a water pump control device according to an embodiment of the present disclosure.

Detailed ways

The present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure, and are not used to limit the present disclosure.

In the following description, the use of suffixes such as “module”, “component” or “unit” used to indicate elements is only for facilitating the description of the present disclosure, and has no specific meaning in itself. Therefore, "module", "part" or "unit" can be used in a mixed manner.

Example one

Fig. 1 is a flowchart of a control method for automatically emptying a water pump according to an embodiment of the present disclosure. As shown in Fig. 1, the method includes the following steps:

Step S101, collecting operating parameter values of the water pump;

Step S102: Determine the load operating state of the water pump according to the collected operating parameter values;

Step S103: Perform operation protection on the water pump according to the determined load operating state.

Among them, the operating parameters belong to the direct operating parameters of the water pump, such as rotational speed and current. The load operation state may include no-load operation state, stuck operation state, locked-rotor operation state, etc.

For example, the water pump speed value can be collected through a preset water pump speed detection device; the water pump speed detection device is one or more of the following: Hall sensor, reed switch, photoelectric sensor.

The water pump may be a submersible pump. As shown in FIG. 2, the submersible pump may include a water inlet, a water outlet, a drain cavity, and a water pump controller. The method in the embodiment of the present disclosure may be executed in the water pump controller.

The embodiments of the present disclosure collect preset operating parameter values of the water pump, and determine the load operation state of the water pump according to the collected operating parameter values, and then perform operation protection on the water pump according to the determined load operation state, thereby achieving According to the direct collection of the operating parameter values of the water pump, the load operation status of the water pump is directly determined, and then the operation protection of the water pump is carried out, instead of indirectly determining the load operation status of the water pump based on the collection of water flow, pressure and other signals, thereby effectively improving the pump The detection accuracy rate in the operation protection process effectively simplifies the existing detection methods and effectively reduces the detection cost.

In the embodiment of the present disclosure, optionally, the operating protection of the water pump according to the determined load operating state may include:

When it is determined that the water pump is in a no-load operation state, stuck or locked-rotor operation state, controlling the water pump to stop operation according to the time when the water pump is in a corresponding load operation state;

When it is determined that the water pump has air, a start-stop cycle control method is adopted to control the operation of the water pump until the water pump is in a normal load operation state, then the start-stop cycle control method is stopped.

Among them, the time of the corresponding load operating state includes no-load operating time, stuck or locked-rotor operating time. The start-stop cycle can also be described as the start-stop cycle.

For example, when it is determined that the water pump is in a no-load operation state, that is, the water pump is no-load operation. In order to avoid the high temperature rise of the water pump during no-load operation and the wear of moving parts during no-water operation, which affects the service life of the water pump, if the no-load operation time exceeds the preset no-load time threshold (preferably 5 minutes), the power supply of the water pump is cut off and the water pump is stopped. , Realize the no-load protection of the pump.

For another example, when it is determined that the water pump is in a stuck or locked-rotor operation state, in order to avoid the water pump from becoming stuck or the locked-rotor operation temperature rises too high, which affects the service life of the water pump, the stuck or locked-rotor operation time exceeds the preset stuck Or the blocking time threshold (preferably 5 minutes), the power supply of the water pump is cut off, the operation of the water pump is stopped, and the blocking or blocking protection of the water pump is realized.

For another example, when it is determined that the water pump has air, it is necessary to operate the emptying mode, that is, the start-stop cycle control method is adopted to control the operation of the water pump. Through the start-stop cycle control method, the pump can be quickly emptied, effectively solving the situation that the pump is slow or unable to pump water.

In some embodiments, the use of a start-stop cycle control method to control the operation of the water pump may include:

According to the preset running time and stopping time, the water pump is controlled to run repeatedly in a cycle of alternating running and stopping.

That is to say, control the water pump to run for a preset running time (preferably 3 seconds) and stop the preset stop time (preferably 3 seconds), and run intermittently and repeatedly, and at the same time, it can also detect the speed. Run, exit the drain mode operation and enter the continuous operation state.

In the embodiment of the present disclosure, optionally, when the operating parameter value is the speed value of the water pump, the determining the load operating state of the water pump according to the collected operating parameter value includes:

According to the collected speed value of the water pump and the speed interval corresponding to each load operating state, the load operating state of the water pump is determined.

Determine the load operation state of the water pump through the collected water pump speed value and the speed interval corresponding to each load operation state, which can effectively avoid the misjudgment of the critical speed point and eliminate the speed deviation caused by the pump, and effectively improve the detection of operation protection Accuracy.

Wherein, determining the load operation state of the water pump according to the collected water pump rotation speed value and the rotation speed interval corresponding to each load operation state includes:

When n>n1-Δn, it is determined that the water pump is in the no-load operation state;

When n1-Δn≥n>n2-Δn, it is determined that the water pump has air;

When n≤n2-n3, it is determined that the water pump is in the stuck or locked-rotor operation state;

When n2-n3<n≤n2-Δn, it is determined that the water pump is in a normal load operation state;

Wherein, the n is the collected rotational speed value of the water pump, the n1 is the pre-collected rotational speed value of the water pump in the no-load operation state, and the n2 is the pre-collected rotational speed of the water pump at rated water discharge The Δn is a preset rotational speed error threshold, and the n3 is a preset rotational speed threshold, preferably 250.

Of course, in order to avoid the failure of the above-mentioned water pump speed detection device, in some embodiments, the determining the load operation state of the water pump according to the collected operating parameter values may also include:

When I<I1+ΔI, it is determined that the water pump is in the no-load operation state;

When I1+ΔI≤I<I2+ΔI, it is determined that there is air in the water pump;

When I≥I2+I3, it is determined that the water pump is in the stuck or locked-rotor operation state;

When I2+I3>I≥I2+ΔI, it is determined that the water pump is in a normal load operation state;

Wherein, the I is the collected current value of the water pump, the I1 is the pre-collected current value of the water pump in the no-load operating state, and the I2 is the pre-collected current of the water pump at the rated water discharge Value, the ΔI is a preset current error threshold, and the I3 is a preset current threshold.

The following uses a Hall sensor as an example to describe in detail the control method of the automatic emptying pump in the embodiment of the present disclosure.

As shown in Figure 3, the control method for automatically emptying the water pump may include:

S201, the water pump is turned on, and a start signal is detected.

S202: Detect the speed of the water pump. The hall sensor is used to sense the rotation speed of the rotor magnetic field, and the actual rotation speed of the water pump rotor is calculated by the number of output pulses.

S203: Determine the load operation state of the water pump according to the collected operating parameter value, and perform operation protection on the water pump according to the determined load operation state.

In detail, collect the rotational speed of the water pump when idling (in no-load operation state) and record it as n1; collect the rotational speed of the water pump at rated water discharge and record it as n2; collect the actual running speed of the water pump and record it as n. In order to avoid the misjudgment of the critical rotation speed point and eliminate the rotation speed deviation produced by the water pump, the rotation speed error threshold Δn (generally 50 to 80, preferably 50 rotations) is set.

When n>n1-Δn, it is judged that the pump is running without load. In order to avoid the high temperature rise of the water pump during no-load operation and the wear of moving parts during no-water operation, which will affect the service life of the water pump, if the no-load operation time exceeds a certain time (preferably 5 minutes), the power supply of the water pump is cut off, and the operation of the water pump is stopped to realize the water pump No-load protection.

When there is water in the water pump, the speed of the water pump will decrease. When n1-Δn≥n>n2-Δn, it is determined that there is air in the pump and the drain mode is required. The drain mode means that the pump runs for a certain time (preferably 3 seconds) ) Stop for a certain period of time (preferably 3 seconds), run intermittently and repeatedly, and at the same time check the speed. When the speed n2-250<n≤n2-Δn, it is determined that the pump has entered normal load operation and exits the emptying mode operation. Enter the continuous operation state.

When n≤n2-250, it is judged that the water pump is stuck or blocked. In order to prevent the water pump from sticking or locked-rotor operation, the temperature rise is too high, which affects the service life of the water pump. If the stuck or locked-rotor operation time exceeds a certain time (preferably 5 minutes), the power supply of the water pump is cut off, and the operation of the water pump is stopped to realize the stuck water pump. Or stall protection.

Based on the above steps, the detection accuracy in the process of pump operation protection is effectively improved, the existing detection methods are effectively simplified, and the detection cost is effectively reduced; and the pump can be quickly emptied, effectively solving the problem of slow pumping or failure of pumping. The situation in Sheung Shui.

Example two

Corresponding to the control method for the automatic emptying of the water pump introduced in FIG. 1, this embodiment provides a control device for the automatic emptying of the water pump, and the device includes:

The collection module 10 is set to collect the operating parameter values of the water pump;

The state determining module 12 is configured to determine the load operating state of the water pump according to the collected operating parameter values;

The protection module 14 is configured to perform operation protection on the water pump according to the determined load operation state.

In some embodiments, the protection module 14 includes:

The first protection unit is configured to control the water pump to stop operation according to the time when the water pump is in the corresponding load operation state when it is determined that the water pump is in the no-load operation state, stuck or locked-rotor operation state;

The second protection unit is configured to use a start-stop cycle control method to control the operation of the water pump when it is determined that the water pump has air.

Wherein, the use of a start-stop cycle control method to control the operation of the water pump includes:

According to the preset running time and stopping time, the water pump is controlled to cyclically operate in an alternate manner of running and stopping.

In some embodiments, the operating parameter value is a water pump speed value, and the state determining module 12 is specifically configured to determine the load at which the water pump is located according to the collected water pump speed value and the speed interval corresponding to each load operating state. Operating status.

Wherein, determining the load operation state of the water pump according to the collected water pump rotation speed value and the rotation speed interval corresponding to each load operation state may include:

When n>n1-Δn, it is determined that the water pump is in the no-load operation state;

When n1-Δn≥n>n2-Δn, it is determined that the water pump has air;

When n≤n2-n3, it is determined that the water pump is in the stuck or locked-rotor operation state;

When n2-n3<n≤n2-Δn, it is determined that the water pump is in a normal load operation state;

Wherein, the n is the collected rotational speed value of the water pump, the n1 is the pre-collected rotational speed value of the water pump in the no-load operation state, and the n2 is the pre-collected rotational speed of the water pump at rated water discharge The Δn is a preset rotational speed error threshold, and the n3 is a preset rotational speed threshold.

The collection module 10 is specifically configured to collect the water pump rotation speed value through a preset water pump rotation speed detection device; the water pump rotation speed detection device is one or more of the following:

Hall sensor, reed switch and photoelectric sensor.

When I<I1+ΔI, it is determined that the water pump is in the no-load operation state;

When I1+ΔI≤I<I2+ΔI, it is determined that there is air in the water pump;

When I≥I2+I3, it is determined that the water pump is in the stuck or locked-rotor operation state;

When I2+I3>I≥I2+ΔI, it is determined that the water pump is in a normal load operation state;

Wherein, the I is the collected current value of the water pump, the I1 is the pre-collected current value of the water pump in the no-load operating state, and the I2 is the pre-collected current of the water pump at the rated water discharge The ΔI is a preset current error threshold, and the I3 is a preset current threshold.

When the embodiments of the present disclosure are specifically implemented, you can also refer to the first embodiment, which has corresponding technical effects.

Example three

An embodiment of the present disclosure provides a device, which includes a water pump control device as described in any one of the second embodiment.

For specific implementation of the embodiments of the present disclosure, please refer to the second embodiment, which has corresponding technical effects.

Example four

An embodiment of the present disclosure provides a computer storage medium that stores a control program for a water pump, and the program can be executed by at least one processor to implement the method for controlling a water pump as described in any one of the first embodiment A step of.

For specific implementation of the embodiments of the present disclosure, please refer to the first embodiment, which has corresponding technical effects.

From the above description, it can be seen that the present disclosure directly collects the rotation speed of the water pump, so as to realize the lock-rotation and idling protection of the water pump. At the same time, through speed collection and speed interval determination, the load of the pump is determined, and the cycle start-stop control method is adopted to enable the pump to be drained quickly and solve the situation that the pump is slow or unable to pump water.

The main core points of this disclosure are:

1. Directly use the Hall sensor to collect the speed of the water pump to realize the blocking and idling protection of the water pump, which is more accurate and reliable than indirect detection schemes such as water flow and lower cost.

2. Determine the load condition of the pump through speed collection and speed range determination, and adopt a cycle start-stop control method to enable the pump to be quickly drained and solve the situation that the pump is slow or unable to pump water.

It should be noted that in this article, the terms "include", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, It also includes other elements not explicitly listed, or elements inherent to the process, method, article, or device. If there are no more restrictions, the element defined by the sentence "including a..." does not exclude the existence of other identical elements in the process, method, article or device that includes the element.

The embodiments of the present disclosure are described above with reference to the drawings, but the present disclosure is not limited to the above-mentioned specific embodiments. The above-mentioned specific embodiments are only illustrative and not restrictive. Those of ordinary skill in the art are Under the enlightenment of the disclosure, many forms can be made without departing from the purpose of the disclosure and the protection scope of the claims, and these are all protected by the disclosure.

Claims (11)

1. A method for controlling a water pump, the method comprising:

   Collect the operating parameter values of the pump;

   Determine the load operating state of the water pump according to the collected operating parameter values;

   According to the determined load operating state, the water pump is operated and protected.
2. The method according to claim 1, wherein the operating protection of the water pump according to the determined load operating state comprises:

   When it is determined that the water pump is in a no-load operation state, stuck or locked-rotor operation state, controlling the water pump to stop operation according to the time when the water pump is in a corresponding load operation state;

   When it is determined that the water pump has air, a start-stop cycle control method is adopted to control the operation of the water pump.
3. The method according to claim 2, wherein said adopting a start-stop cycle control method to control the operation of said water pump comprises:

   According to the preset running time and stopping time, the water pump is controlled to cyclically operate in an alternate manner of running and stopping.
4. The method according to claim 2, wherein, when the operating parameter value is the speed value of the water pump, the determining the load operating state of the water pump according to the collected operating parameter value comprises:

   According to the collected speed value of the water pump and the speed interval corresponding to each load operating state, the load operating state of the water pump is determined.
5. The method according to claim 4, wherein the determining the load operation state of the water pump according to the collected water pump rotation speed value and the rotation speed interval corresponding to each load operation state comprises:

   When n>n1-Δn, it is determined that the water pump is in the no-load operation state;

   When n1-Δn≥n>n2-Δn, it is determined that the water pump has air;

   When n≤n2-n3, it is determined that the water pump is in the stuck or locked-rotor operation state;

   When n2-n3<n≤n2-Δn, it is determined that the water pump is in a normal load operation state;

   Wherein, the n is the collected rotational speed value of the water pump, the n1 is the pre-collected rotational speed value of the water pump in the no-load operation state, and the n2 is the pre-collected rotational speed of the water pump at rated water discharge The Δn is a preset rotational speed error threshold, and the n3 is a preset rotational speed threshold.
6. The method according to claim 4 or 5, wherein the collecting operating parameter values of the water pump includes

   The water pump rotation speed value is collected through a preset water pump rotation speed detection device; the water pump rotation speed detection device is one or more of the following:

   Hall sensor, reed switch and photoelectric sensor.
7. The method according to claim 2, wherein, when the operating parameter value is the operating current value of the water pump, the determining the load operating state of the water pump according to the collected operating parameter value comprises:

   When I<I1+ΔI, it is determined that the water pump is in the no-load operation state;

   When I1+ΔI≤I<I2+ΔI, it is determined that there is air in the water pump;

   When I≥I2+I3, it is determined that the water pump is in the stuck or locked-rotor operation state;

   When I2+I3>I≥I2+ΔI, it is determined that the water pump is in a normal load operation state;

   Wherein, the I is the collected current value of the water pump, the I1 is the pre-collected current value of the water pump in the no-load operating state, and the I2 is the pre-collected current of the water pump at the rated water discharge Value, the ΔI is a preset current error threshold, and the I3 is a preset current threshold.
8. A control device for a water pump, the device comprising:

   The collection module is set to collect the operating parameter values of the pump;

   The state determination module is set to determine the load operation state of the water pump according to the collected operating parameter values;

   The protection module is set to perform operation protection on the water pump according to the determined load operation state.
9. The device according to claim 8, wherein the protection module comprises:

   The first protection unit is configured to control the water pump to stop operation according to the time when the water pump is in the corresponding load operation state when it is determined that the water pump is in the no-load operation state, stuck or locked-rotor operation state;

   The second protection unit is configured to use a start-stop cycle control method to control the operation of the water pump when it is determined that the water pump has air.
10. A device comprising the water pump control device according to claim 8 or 9.
11. A computer storage medium storing a water pump control program, and the program can be executed by at least one processor to implement the steps of the water pump control method according to any one of claims 1-7.

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