KR102071066B1 - Deep-well pump control system - Google Patents

Abstract

The present invention relates to a deep-well pump control system. An objective of the present invention is to offset a repulsion impact of a motor pump by an inverter and a timer function, and resolve a noise problem induced in a deep-well water level sensor when using the inverter. To achieve the objective, according to an embodiment of the present invention, the deep-well pump control system comprises: a pump installed on a pipe for drainage connecting an underground deep well including a deep-well water level electrode bar and a ground tank including a tank water level electrode bar to transport water; an inverter to convert power supplied to the pump; a deep-well water level sensor installed in the underground deep well to measure a water level of the underground deep well; a tank water level sensor installed on the ground tank to measure the water level of the ground tank; and a control unit to control the operation of the pump and the operation of the inverter based on measurement results of the deep-well water level sensor and the tank water level sensor, and reduce the driving speed of the inverter gradually for a reference time if a water shortage signal for the underground deep well is determined as a result of measurement by the deep-well water level sensor.

Description

Deep pump control system {DEEP-WELL PUMP CONTROL SYSTEM}

One embodiment of the present invention relates to a deep well pump control system.

In general, a pump controller is a device used to automatically adjust a constant water level in an underground deep underground water tank.

In these devices, the pipe for deep drainage is used as a plastic material for the convenience of construction, and the motor pump is damaged or the sensor is disconnected frequently due to a repulsive impact force when starting or stopping the existing motor pump.

In addition, the deep water level sensor is operated by the underground deep water drainage, and noise generated from the inverter is induced to the deep water level sensor when the motor pump decelerates and stops, thereby causing the motor pump to burn out by continuously restarting the motor pump even in the dry water state.

Noise is generated when the inverter is decelerated, and this noise is induced to the deep water level sensor, which is fatal to the operation.

Registered Patent Publication No. 10-1311715 (Notice: 2013. 09. 25)

An embodiment of the present invention provides a deep heart pump control system that can offset the repulsive impact of the motor pump through an inverter and a timer function, and solve the noise problem induced by the deep water level sensor when using the inverter.

A deep well pump control system according to an embodiment of the present invention includes a pump for transferring water installed in a drainage pipe connecting an underground deep well including a deep water level electrode and a ground tank including a tank water level electrode; An inverter that converts power supplied to the pump; A deep water level sensor installed in the underground deep well to measure the water level of the underground deep well; A tank level sensor installed in the ground tank to measure the water level of the ground tank; And the operation of the pump and the operation of the inverter based on the measurement results of the deep water level sensor and the tank water level sensor, but when the measurement result by the deep water level sensor is determined to be a water signal for the underground well, the inverter It may include a control unit for gradually reducing the driving speed for a reference time.

The core pump control system is connected to the control unit through the pump and the motor pump cable, and may further include a switching unit for selecting the pump driving or the inverter driving by the control unit.

The deep water level sensor cable and the motor pump cable connected between the pump and the deep water level sensor are installed in a single pipe, and the control unit has a water level of the underground deep well below a first level and a water level of the ground tank. When the level is 2 or higher, the inverter may be driven through the switching unit.

When the water level of the ground tank is a third level higher than the first level, and the water level of the underground deep well is less than or equal to the fourth level, the controller decelerates and stops the drive of the inverter step by step in a preset manner. It may output that the ground tank is full.

The deep well pump control system according to an embodiment of the present invention drives the inverter according to the level of the ground tank and the underground well, accelerates to a normal speed while minimizing the repulsive impact force of the motor pump, and supplies water to the ground tank. When the water level is reached and the underground well is at a low water level, the inverter is decelerated and stopped while minimizing the repulsive force in a preset manner to display the full water level, thereby optimizing energy efficiency by optimizing the pump's energy efficiency and controlling pump and inverter durability Improve it.

1 is a view showing a heart pump control system according to an embodiment of the present invention.
Figure 2 is a flow chart showing the operation of the heart pump control system according to an embodiment of the present invention.
FIG. 3 is a block diagram showing a configuration for rapid / slow charging using a charging unit provided in a core pump control system according to various embodiments of the present disclosure.
4 is a flow chart illustrating a rapid / slow charging sequence during operation of a charging unit provided in a deep-heart pump control system according to various embodiments of the present disclosure.
5A and 5B are graphs showing an example of a temperature and a seed-rate profile during rapid charging during operation of a charging unit provided in a core pump control system according to various embodiments of the present disclosure.

Terms used in the present specification will be briefly described, and the present invention will be described in detail.

The terminology used in the present invention was selected from the general terms that are currently widely used while considering the functions in the present invention, but this may vary according to the intention or precedent of a person skilled in the art or the appearance of new technologies. In addition, in certain cases, some terms are arbitrarily selected by the applicant, and in this case, their meanings will be described in detail in the description of the applicable invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents of the present invention, not simply the names of the terms.

When a part of the specification "includes" a certain component, this means that other components may be further included instead of excluding other components unless specifically stated otherwise. In addition, terms such as “... unit” and “module” described in the specification mean a unit that processes at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains may easily practice. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. In addition, in order to clearly describe the present invention in the drawings, parts irrelevant to the description are omitted, and like reference numerals are assigned to similar parts throughout the specification.

1 is a view showing a heart pump control system according to an embodiment of the present invention, Figure 2 is a flow chart showing the operation of a heart pump control system according to an embodiment of the present invention.

As shown in Figure 1, the heart pump control system 10 according to an embodiment of the present invention cancels the repulsive impact of the motor pump through an inverter and a timer function, and solves the noise problem induced to the heart water level sensor when using the inverter As a system for solving, it includes a pump 220, an inverter (not shown), a deep water level sensor 230, a tank water level sensor 120, a switching unit 400, and a control unit 300.

Here, as shown in FIG. 1, the drainage conduit 130 may be generally applied with a water intake pipe, and when using groundwater as water, one end of the pipe may be installed deep from the ground to the ground, and the pipe The other end of the can be connected to the ground tank 100 to guide the water from the ground to the ground tank 100.

The pump 220 is installed in a pipeline 130 for drainage connecting the underground deep well 200 including the deep water level electrode rod 210 and the ground tank 100 including the tank water level electrode rod 110 to transport water. Device. The pump 220 is installed in the drainage conduit 130 to transport water, and a cylindrical deep pump connected to the drainage conduit 130 may be applied.

At this time, the above ground tank 100 is connected to the drainage conduit 130 and stores water transported by the pump 220, and generally can be located in the high ground of the ground and can store enough water. So that the water receiving space is formed inside.

The inverter is a device for converting power supplied to the pump 220, and may convert electrical characteristics such as frequency, current, and voltage to provide power to the pump 220.

Although not shown, in order to reduce power signal interference, the inverter is detachably installed in the pump 220, the control unit 300 is installed on the ground for easy access by a user, and is controlled between the control unit 300 and the inverter. A line may be installed extending along the drainage conduit 130.

Here, the control line (C) may be used in the optical communication method or an infrared communication optical fiber to protect from various surge power such as lightning or static electricity.

Therefore, when various control signals are applied from the control unit 300 to the inverter, the inverter can directly supply power to the pump 220 in a very short path, so the rotational speed, start and stop control of the pump 220 can be controlled very precisely. It can be, for example, it is possible to minimize the effect of various electromagnetic waves, lightning, etc. on the inverter and the pump 220.

The deep water level sensor 230 is a sensor device installed in the underground deep well 200 to measure the water level of the underground deep well 200, a plurality of deep water level electrode rods 210, E4, provided in the underground deep well 200 The water level information of the underground well 200 detected through E5) may be detected and output to the outside.

At this time, the deep water level sensor cable 240 and the motor pump cable 140 connected between the pump 220 and the deep water level sensor 230 may be installed in one pipe.

The tank level sensor 120 is a sensor device installed in the ground tank 100 to measure the level of the ground tank 100, a plurality of ground tank water level electrode rods 110, E1 provided inside the ground tank 100 , E2, E3) can sense the water level information of the ground tank 100 and output it to the outside.

The water level rise of the ground tank 100 according to the operation of the pump 220 and the inverter using the deep water level sensor 230 and the tank water level sensor 120 and the water level drop of the ground tank 100 according to the water consumption Considering that, the control unit 300 may apply a power control signal to the pump 220 and the inverter.

Here, the deep water level sensor 230 and the tank water level sensor 120 may include a piezoelectric element (not shown) that senses the water level by measuring the water pressure of the water.

The switching unit 400 is connected to the control unit 300 through the pump 220 and the motor pump cable 140, and is a device that selects pump driving or inverter driving by the control unit 300. The switching unit 400 is designed to select an electromagnetic contactor or an inverter for driving the pump 220.

The control unit 300 controls the operation of the pump 220 and the operation of the inverter based on the measurement results of the deep water level sensor 230 and the tank water level sensor 120, but the measurement result by the deep water level sensor 230 When it is judged as a prime water signal for the underground well 200, the inverter is controlled to gradually decrease the driving speed for a reference time.

The control unit 300 may be installed in various on-site switchboards or on-site control panels.

Specifically, the control unit 300 may drive the inverter through the switching unit 400 when the water level of the underground well 200 is lower than or equal to the first level, and the water level of the ground tank 100 is higher than or equal to the second level.

In addition, when the water level of the ground tank 100 is a third level higher than the first level, and the water level of the underground deep well 200 is less than or equal to the fourth level, the controller 300 drives the inverter to a timer circuit provided therein. Although it is decelerated and stopped in a stepwise manner in a preset manner, the ground tank 100 may be output through the display unit.

To this end, the control unit 300 may be implemented in the form of a microprocessor or electrical elements installed on a circuit board, or in addition, in the form of a storage device in which a program that automatically performs a series of processes is stored.

In addition, the control unit 300, when the required power measured by the pump 220 or the inverter rises above the reference value of the failure of the pump 220, a notification circuit (not shown) for applying a pump 220 failure notification signal to the display D City) may be further provided.

Here, the various circuits described above may be implemented in the form of microprocessors or electrical elements installed on a circuit board, or in addition, in the form of a storage device in which a program that automatically performs a series of processes is stored.

Therefore, the present heart pump control system 10 configured as described above may use the inverter capable of adjusting the acceleration / deceleration of the pump 220 to offset the repulsive impact force of the pump 220 and induce it to the heart water level sensor when the inverter is used. The noise problem can be solved in a simple way. In more detail, the heart pump control system 10 can stably solve the operation of the heart water level sensor 230 by adding a timer circuit corresponding to the deceleration stop time (noise generation time) of the inverter when the heart water is resigned. , Repulsive impact force generated at the time of stopping at start-up is also canceled out and noise induced to the deep water level sensor 230 is blocked to improve stable operation and durability of the pump 220.

As illustrated in FIG. 2, the operation of the deep well pump control system 10 according to an embodiment of the present invention will be described by dividing it into a low water level start and a full water level stop mode.

The core pump control system 10 is driven in the following order when the low water level start (motor pump start) operation.

First, the input power is selected from the power supply unit (not shown) to be supplied to the switch (S10). Then, when the electrode for level detection of the ground tank 100 (water supply tank) becomes lower than or equal to the first level (S20), it becomes a low water level state. At this time, when the ground tank water level sensor is below the first level, a low water level signal (water supply request) is output. In addition, when the electrode for level detection of the underground deep well 200 (drainage tank) reaches a second level or higher, the water level is reached. At this time, the deep water level sensor outputs a drainable signal if it is a second level or higher (S30). Then, the control unit starts the inverter (S40) if the level of the ground tank 100 is below the first level and the level of the underground well 200 is above the second level. Accordingly, the inverter accelerates to the normal speed while minimizing the repulsive impact force of the motor pump to supply water to the ground tank (100).

In addition, the core pump control system 10 is driven in the following order when the water level stop / deep water stop (motor pump stop) operation.

First, when the electrode for level detection of the ground tank 100 (water supply tank) passes the first level (S60) and reaches the third level (S70), the water level is reached. At this time, the ground tank water level sensor sends a full water level signal to the control unit. Then, if the electrode for detecting the level of the underground well 200 (drainage tank) is below the fourth level (S80), it is in a low water level. At this time, the deep water level sensor outputs a low water level signal. Then, when the water level of the ground tank 100 (water supply tank) reaches the third level, and the water level of the underground well 200 (water drainage tank) is less than or equal to the fourth level, the control unit minimizes the repulsive force of the inverter while at full water level. Deceleration stop (S90) is performed to display the full water level.

In general, when the level sensing electrode of the underground well 200 (drain tank) generates a signal below the fourth level, a low water level signal (a deep water signal) is sent to the control unit, regardless of the level signal of the ground tank 100. The motor pump should be stopped. At this time, the motor cable and the deep water level sensor cable are wired in the same pipe, and noise generated during deceleration of the inverter is induced to the deep water level sensor cable, causing the deep water level sensor to malfunction. In addition, the motor pump may be burned out by the continuous stop / start repetitive operation of the motor pump in the ground state of the underground deep well 200 (drainage tank).

Therefore, in the present invention, a timer circuit is built into the control unit to prevent malfunction of the deep water level sensor, thereby blocking the inflow of noise generated during the inverter stop time, thereby ensuring stability in the operation of the deep water level sensor.

Meanwhile, the power supply unit 150 that supplies power to the core pump control system 10 may further include a charging unit.

In general, in a battery such as a lithium ion battery or a lithium polymer battery, when the charge seed-rate increases so that the charging time is shortened, lithium ions are precipitated (lithium plating) on the surface of the negative electrode active material, and the battery life is rapidly due to electrolyte decomposition. It is known to be shortened. Accordingly, the present invention describes a configuration / method capable of suppressing battery degradation and shortening of life while shortening the charging time (quick charging).

FIG. 3 is a block diagram showing a configuration for rapid / slow charging using a charging unit provided in the deep well pump control system 10 according to various embodiments of the present invention.

As shown in FIG. 3, FIG. 3 shows a charging unit provided in the deep-heart pump control system 10 according to various embodiments of the present invention, a thermoelectric element 125, a current adjusting unit 126, and a charging mode selector 127 ), A charging control unit 128 and a storage unit (memory) 129.

The thermoelectric element 125 is installed on the surface of the battery 124, and serves to increase or decrease the temperature of the battery 124 according to the ambient environment temperature under the control of the charging control unit 128. According to the thermoelectric element 125, one surface may be a heating surface and the other surface may be an endothermic surface according to the flow direction of the current, so that it is simply operated as a heating element or controlled as an endothermic element by controlling the flow direction of the current. can do.

The current control unit 126 is installed between the DC-DC converter 123 and the battery 124, and serves to control the seed rate supplied to the battery 124 under the control of the charging control unit 128. . The current controller 126 may be implemented by Pulse Width Modulation (PWM) controlled Insulated Gate Bipolar mode Transistor (IGBT), Field Effect Transistor (FET), or bipolar transistor.

The charging mode selection unit 127 serves to select a rapid charging mode (for example, a 30 minute rapid charging mode) or a slow charging mode (for example, a 3 hour slow charging mode) by the user. The charging mode selection unit 127 is, for example, but not limited to, if the user does not specifically select the charging mode, the slow charging mode is basically selected and transmitted to the controller 128. In addition, the charging mode selection unit 127 may be implemented by a key or button structure.

The charging control unit 128 loads the temperature and / or sea-rate profile of the battery 124 per charging hour and / or charging capacity corresponding to the charging mode selected by the user, and the battery 124 It controls temperature and / or sea-rate and serves to charge the battery 124. Of course, for this purpose, the charging control unit 128 directly controls the thermoelectric element 125 and the current control unit 126.

The storage unit 129 stores the temperature and / or sea-rate profile of the battery 124 per charging time and / or charging capacity according to the operation algorithm (program or software) and the charging mode of the charging control unit 128 described above. do. The temperature and / or sea-rate profile of the battery 124 is stored as a pre-optimized value according to a number of experiments or simulations when the battery 124 is manufactured.

In this way, when the fast charging mode is selected by the user, the charging control unit 128 gradually reduces the temperature and seed rate of the battery 124 from the highest value to the lowest value according to the elapse of the charging time. By directly controlling the 125 and the current control unit 126, it is possible to minimize the deterioration or shortening of the life of the battery 124 while reducing the charging time.

For example, but not limited to, the charging control unit 128 may gradually decrease the sea-rate in the form of a step by controlling the current adjusting unit 126, particularly at a point where the level is changed and / or at the same level. The charging time can be further shortened by further providing at least one charging pause time. That is, rather than continuously supplying the charging current, when supplying the charging current discontinuously, and also when reducing the amount of charging current, the internal resistance of the battery 124 decreases and stabilizes, so that the charging speed becomes faster and the deterioration phenomenon appears small. .

For example, although not limited, the charging control unit 128 controls the current control unit 126 to gradually decrease the sea-rate in the form of steps from about 5C to 1C, and at this time, the thermoelectric element 125 is controlled to control the temperature. It can be gradually decreased from 50 ° C to 10 ° C. Here, these numbers are only examples for understanding the present invention, and the present invention is not limited to these numerical ranges.

On the other hand, as another example, although not limited, the charging control unit 128 maintains the temperature of the battery 124 at approximately 20 ° C. to 30 ° C. using the thermoelectric element 125 when the slow charge mode is selected by the user. Also, by controlling the current adjusting unit 126, the seed rate can be maintained at approximately 0.1C to 0.5C. That is, in this temperature range and seed rate, although the charging time becomes longer, the deterioration rate or shortening of the life of the battery is the smallest.

In addition, although not shown in the drawings, the charging unit according to an embodiment of the present invention includes a temperature sensor for sensing the temperature of the battery 124 and a voltage sensor and / or current sensor for estimating the capacity of the battery 124 Ham is natural.

4 is a flowchart illustrating a rapid / slow charging sequence during operation of a charging unit provided in the deep well pump control system 10 according to various embodiments of the present invention, and FIGS. 5A and 5B are diagrams illustrating various embodiments of the present invention. It is a graph showing an example of the temperature and the sea-rate profile during rapid charging during the operation of the charging unit provided in the core pump control system 10. In FIG. 5A, the X-axis is the battery capacity (SOC,%), and the Y-axis is the temperature (° C). In addition, in FIG. 5B, the X-axis is the battery capacity (SOC,%), and the Y-axis is the sea-rate (C).

As illustrated in FIG. 4, the wireless charging method includes: determining whether it is a fast charging mode (S1), loading a temperature and seed rate for the rapid charging (S2), and determining whether it is a slow charging mode (S3); It includes a charging temperature and a sea-rate profile loading step (S4), checking whether the battery is fully charged (S5), and stopping charging (S6).

In step S1 of determining whether it is a rapid charging mode, the charging control unit 128 determines whether a rapid charging mode is selected by the user through the charging mode selection unit 127. If the fast charging mode is selected, step S2 is performed; otherwise, step S3 is performed.

In the step S2 of loading the temperature and seed rate for rapid charging, the charging control unit 128 loads the temperature and seed rate for rapid charging per charging time and / or charging capacity stored in the storage unit 129.

For example, although not limited, as illustrated in FIG. 5A, the charging control unit 128 controls the thermoelectric element 125 so that the temperature of the battery 124 is approximately 30 ° C. to regardless of the ambient temperature at the initial stage of charging. The temperature is maintained at 50 ° C, and the thermoelectric element 125 is controlled as the charging time elapses or the charging capacity increases, so that a profile is loaded so that the temperature of the battery 124 is maintained at approximately 20 ° C to 30 ° C. Moreover, as illustrated in FIG. 5B, the charging control unit 128 controls the current adjusting unit 126 to form a pulse having a charging pause time while the seed rate of the battery 124 is approximately 3C to 5C at the initial stage of charging. The furnace current is supplied to the battery 124, and as the charging time elapses or the charging capacity increases, the current adjusting unit 126 is controlled so that the seed rate of the battery 124 is 1C to 2C, and the charging idle time is In the form of the pulses it has, it loads a profile that allows current to be supplied to the battery 124.

Meanwhile, in step S3 of determining whether the charging mode is slow, the charging control unit 128 determines whether the slow charging mode is selected by the user through the charging mode selection unit 127. When the slow charging mode is selected, step S4 is performed.

In the step S4 of loading the temperature and seed rate for slow charging, the charging control unit 128 loads the slow charging temperature and seed rate for each charging time and / or charging capacity stored in the storage unit 129.

For example, although not limited, the charging control unit 128 controls the thermoelectric element 125 to maintain the temperature of the battery 124 at approximately 20 ° C to 30 ° C regardless of the ambient temperature, and also the current control unit ( 126) to load the filling profile that maintains the seed-rate at approximately 0.1C-0.5C.

In step S5 of checking whether the battery is fully charged, the charging control unit 128 determines whether or not the current battery 124 is charged. The determination of whether or not the battery 124 is fully charged may be performed by converting the voltage of the battery 124 into a state of charge (SOC) or measuring the total amount of charge injected into the battery 124. The method for determining whether the battery 124 is fully charged is already well-known to those skilled in the art, so a description thereof will be omitted.

If it is confirmed that the battery 124 is fully charged, step S6 is performed, otherwise it returns to step S1.

In the charging stop step (S6), the charging control unit 128 controls the current adjusting unit 126 to block the battery 124 from being supplied with a current, so that the charging of the battery 124 is completed.

In this way, in the embodiment of the present invention, by supplying the temperature of the relatively high battery 124 and the relatively high pulse charging current in a region where the capacity of the battery 124 is low, there is no precipitation phenomenon of lithium ions and electrolytic solution decomposition. It is possible to rapidly charge the battery 124 in the absence state. Here, when the battery 124 is charged with a relatively high pulse charging current in a situation where the temperature of the battery 124 is approximately 0 ° C. or less, the above-described lithium ion precipitation and electrolytic solution decomposition occurs, so that the deterioration of the battery 124 is severe. Therefore, the service life is shortened. However, as in the present invention, regardless of the ambient temperature, when the battery is initially charged, the battery temperature is increased and the battery is charged at a high rate, and when the battery is charged at the end of the battery, the battery temperature is reduced and the battery is charged at a low rate. Deterioration and shortening of life can be reduced.

What has been described above is only one embodiment for implementing the deep pump control system according to the present invention, the present invention is not limited to the above embodiment, and the subject matter of the present invention as claimed in the following claims Anyone who has ordinary knowledge in the field to which this invention belongs without departing will be said to have the technical spirit of the present invention to the extent that various changes can be implemented.

10: deep pump control system 100: ground tank
110: ground tank water level electrode 120: tank water level sensor
130: drainage pipe 140: motor pump cable
200: underground deep well 210: deep water level electrode
220: pump 230: deep water level sensor
300: control unit 400: switching unit

Claims (4)

A pump which is installed in a drainage pipe connecting the underground deep well including the deep water level electrode and the ground tank including the water level electrode;
An inverter that converts power supplied to the pump;
A deep water level sensor installed in the underground deep well to measure the water level of the underground deep well;
A tank level sensor installed in the ground tank to measure the water level of the ground tank; And
Based on the measurement results of the deep water level sensor and the tank water level sensor, the operation of the pump and the operation of the inverter are controlled, but when the result of the measurement by the deep water level sensor is determined to be a water signal for the underground well, the inverter Deep-heart pump control system including a control unit for reducing the driving speed step by step during the reference time,
It is connected to the control unit through the pump and the motor pump cable, further comprising a switching unit for selecting the pump drive or inverter drive by the control unit,
The deep water level sensor cable and the motor pump cable connected between the pump and the deep water level sensor are installed in one pipe,
The control unit drives the inverter through the switching unit when the water level of the underground deep well is less than or equal to the first level, and the water level of the ground tank is greater than or equal to the second level,
The deep water level sensor and the tank water level sensor include a piezoelectric element that senses the water level by measuring the water pressure of the water,
The power supply for supplying power to the heart pump control system further includes a charging unit,
The charging unit is installed on the surface of the battery, is installed between the thermoelectric element to increase or decrease the temperature of the battery according to the ambient environment temperature under the control of the charging control unit, the DC-DC converter and the battery to control the charging control unit In accordance with the current control unit for adjusting the sea-rate supplied to the battery, the charging mode selector for selecting the fast charging mode or the slow charging mode by the user, and the charging hour and charging capacity corresponding to the charging mode selected by the user Loading the temperature of the battery and the profile of the sea-rate, and controlling the temperature and the sea-rate of the battery according to the profile, and the charging control unit for charging the battery, and the operation algorithm of the charging control unit, per charging time according to the charging mode and Including a storage unit that stores the temperature of the battery per charge capacity and the profile of the sea-rate Heart pump control system according to Jing.
delete delete According to claim 1,
When the water level of the ground tank is a third level higher than the first level, and the water level of the underground deep well is less than or equal to the fourth level, the controller decelerates and stops the driving of the inverter stepwise in a preset manner.
A deep well pump control system, characterized in that the ground tank outputs a full water level through a display unit.

Images