EP4328452A1 - Submersible pump and automatic liquid level control method - Google Patents

Submersible pump and automatic liquid level control method Download PDF

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Publication number
EP4328452A1
EP4328452A1 EP22214281.2A EP22214281A EP4328452A1 EP 4328452 A1 EP4328452 A1 EP 4328452A1 EP 22214281 A EP22214281 A EP 22214281A EP 4328452 A1 EP4328452 A1 EP 4328452A1
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EP
European Patent Office
Prior art keywords
liquid level
signal
level sensor
submersible pump
control
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP22214281.2A
Other languages
German (de)
English (en)
French (fr)
Inventor
Junbo Zhang
Ke Yang
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ningbo Junhe Intelligent Technology Co Ltd
Original Assignee
Ningbo Junhe Intelligent Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ningbo Junhe Intelligent Technology Co Ltd filed Critical Ningbo Junhe Intelligent Technology Co Ltd
Publication of EP4328452A1 publication Critical patent/EP4328452A1/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/10—Units comprising pumps and their driving means the pump being electrically driven for submerged use adapted for use in mining bore holes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/08—Units comprising pumps and their driving means the pump being electrically driven for submerged use
    • F04D13/086—Units comprising pumps and their driving means the pump being electrically driven for submerged use the pump and drive motor are both submerged

Definitions

  • the present application relates to the field of automatic submersible pumps, and in particular to a submersible pump and an automatic liquid level control method.
  • Submersible pump is an important device for deep well water lifting. When in use, the whole submersible pump submerges into the water to extract the groundwater to the surface. Submersible pumps are widely used in domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship load regulation, fountain landscape and other fields.
  • Chinese patent application CN213331574 U discloses a water-shortage protection device for a submersible pump.
  • the water-shortage protection device includes a barrel.
  • a top of the barrel is provided with a second water outlet pipe and a second water inlet pipe.
  • a top of the second water outlet pipe is communicated with a second soft long pipe, and the second water inlet pipe is provided with a stop valve.
  • a bottom of an inner chamber of the barrel is provided with a submersible pump body.
  • a top output end of the submersible pump body is provided with a first water outlet pipe.
  • a first soft long pipe is communicated between the first water outlet pipe and the second water outlet pipe.
  • a cable is provided on a right side of the submersible pump body.
  • a second water level sensor is provided on a left wall of the inner chamber of the barrel, and the second water level sensor is located on a top of the submersible pump body.
  • a right wall of the inner chamber of the barrel is provided with a first water level sensor, and the first water level sensor is located above the second water level sensor.
  • a first water inlet pipe is provided at a bottom of a peripheral outer wall of the barrel, and the first water inlet pipe is provided with a solenoid valve.
  • the positions of the first water level sensor and the second water level sensor of the submersible pump are fixed, which will lead to many problems.
  • the water level to be controlled is different according to the use environment and the shape of the water pool.
  • the submersible pump cannot change the height of the water level sensor according to the actual demand.
  • the water level sensor has no indicator light, so its state cannot be directly displayed.
  • the submersible pump is not used for a long time, it is easy for the user to forget which water level sensor is started.
  • the submersible pump only has a delayed turn-off function, and cannot automatically control the water level.
  • An objective of the present application is to provide a submersible pump and an automatic liquid level control method to solve the problems mentioned in the background.
  • the present application provides the following technical solutions.
  • a first aspect of the present application provides a submersible pump, including:
  • the submersible pump can simultaneously turn on at most two liquid level sensors through the switches and detect different liquid levels by turning on the liquid level sensors at different heights.
  • the controller includes a signal processing module and a control module; and the signal processing module is electrically connected to the control module and the liquid level sensor.
  • an inner chamber of the pump body is provided therein with a motor that is electrically connected to the control module; and the control module is configured to control the motor to start or stop.
  • the controller further includes a timing module electrically connected to the signal processing module.
  • a second aspect of the present application provides an automatic liquid level control method, used for the above submersible pump, and including the following steps:
  • liquid level sensors include a first liquid level sensor and a second liquid level sensor; and the first liquid level sensor is provided at a position higher than the second liquid level sensor.
  • the start program includes:
  • the stop program includes:
  • first and second are merely intended to distinguish technical features, rather than to indicate or imply relative importance or implicitly indicate a number of the indicated technical features or implicitly indicate a sequence relationship of the indicated technical features.
  • this embodiment provides a submersible pump, including: pump body 1, control panel 2, sensing assemblies 3, and controller 11.
  • An inner chamber of the pump body 1 is provided therein with an upper chamber and a lower chamber from top to bottom, and a partition is provided between the upper chamber and the lower chamber.
  • the control panel 2 is provided on a side of the pump body 1.
  • the control panel 2 is electrically connected to at least two sensing assemblies 3, which are arranged at different heights of the control panel 2.
  • the sensing assemblies 3 each include liquid level sensor 32, indicator light 33, and switch 31.
  • the switch 31 is a push switch 31, which is provided on the control panel 2 and electrically connected to the liquid level sensor 32.
  • the switch 31 is configured to turn the liquid level sensor 32 on and off.
  • the indicator light 33 is configured to display the on and off states of the liquid level sensor, and at least includes working states such as normally on and flashing.
  • the liquid level sensor 32 is a non-contact liquid level sensor 32.
  • the non-contact liquid level sensor 32 detects a change of a liquid level, and outputs a signal to the controller 11.
  • a top end of the upper chamber of the pump body 1 is provided with a controller 11.
  • the controller 11 is electrically connected to the liquid level sensor 32, and the controller 11 includes a signal processing module, a control module, and a timing module.
  • the timing module is electrically connected to the signal processing module.
  • the control module is electrically connected to the signal processing module.
  • the signal processing module is electrically connected to the liquid level sensor 32.
  • the controller 11 may also be provided inside the control panel 2, and the controller 11 is directly electrically connected to the liquid level sensor 32.
  • the timing module is configured to perform a countdown, such that when the liquid level drops below second liquid level sensor 322, the submersible pump continues to work for a period of time.
  • the signal processing module is configured to receive and output signals.
  • the control module is configured to control motor 4 to rotate or stop, thereby controlling the start or stop of the submersible pump.
  • the upper chamber of the pump body 1 is further provided therein with the motor 4.
  • the motor 4 is provided below the controller 11, and is electrically connected to the controller 11.
  • the indicator light 33 lights up.
  • the liquid level sensor 32 in the sensing assembly 3 senses the change of the liquid level
  • the liquid level sensor generates and transmits a change signal to the signal processing module of the controller 11.
  • the signal processing module receives and outputs the signal to the control module or timing module to realize the automatic induction and control of the submersible pump.
  • Embodiment 1 the present application provides another embodiment based on Embodiment 1.
  • Motor shaft 5 extends from a bottom of the motor 4, and the motor shaft 5 extends into the lower chamber through the partition in the inner chamber of the pump body 1.
  • the motor shaft 5 is made of a metal material with high corrosion resistance and torsion resistance.
  • a bottom end of the motor shaft 5 is sleeved with coupling 6, which is connected to the motor shaft 5 through a positioning screw.
  • the lower chamber of the pump body 1 is provided with impeller 7.
  • the impeller 7 includes an axis center and multiple blades.
  • the blades are arc-shaped and integrally formed with the axis center.
  • the integrated forming design can enhance the strength of the impeller 7, which is safe when the impeller 7 rotates at a high speed and prevents the blades from falling off or flying out.
  • the impeller 7 is provided at the bottom of the motor 4.
  • the impeller 7 is fixed at a bottom of the coupling 6 through a bolt, and the impeller 7 is connected to the motor 4 through the coupling 6.
  • motor 4 rotates, the motor drives motor shaft 5 to rotate, thereby driving coupling 6 and the impeller 7 to rotate together.
  • the pump body 1 further includes water inlet 8 and water outlet pipe 9.
  • the water inlet 8 is provided on a bottom surface of the pump body 1, and communicates an external environment with the lower chamber of the pump body 1.
  • the water outlet pipe 9 is provided on the side of the pump body 1. A top end of the water outlet pipe 9 is provided with a water outlet. An inner chamber of the water outlet pipe 9 is communicated with the lower chamber. After entering the lower chamber from the water inlet 8, the liquid reaches the water outlet pipe 9, and finally sprays out from the water outlet.
  • the water outlet pipe 9 has a three-stage ladder structure with a diameter decreasing from bottom to top.
  • the water outlet pipe 9 with different diameters adapt to external water pipes with different diameters, thereby expanding the adaptability of the submersible pump.
  • the pump body 1 is further provided therein with a diffusion chamber 10.
  • the diffusion chamber 10 is provided between the lower chamber and the water outlet pipe 9, and is connected to the lower chamber and the water outlet pipe 9.
  • the diffusion chamber 10 is configured to slow down a speed of the liquid, thereby further increasing a pressure of the liquid and making it easier to be pumped out.
  • the impeller 7 rotates at high speed.
  • the liquid rotates with the blades of the impeller 7.
  • the liquid flies away from the impeller 7 and shoots outward to enter the diffusion chamber 10 of the pump body 1.
  • the speed of the liquid gradually slows down, and the pressure thereof gradually increases. Finally, the liquid flows out of the water outlet pipe 9.
  • the present application provides another embodiment based on the above embodiment.
  • a bottom end of the pump body 1 is further provided with foot 12.
  • the foot 12 is fixed at the bottom end of the pump body 1 through a bolt.
  • the foot 12 includes a support frame and a bottom plate that are fixed by a bolt.
  • the bottom plate is configured to fit a bottom of the liquid pool when the submersible pump is placed, so as to make the submersible pump stable and not easy to fall.
  • a side peripheral surface of the support frame is provided with a hollow at a symmetrical position, through which the liquid enters the foot 12 from the liquid pool, thereby entering the pump body 1 from the water inlet 8.
  • the foot 12 raises a height of the pump body 1 from the bottom of the liquid pool, so as to prevent the pump body 1 from sinking to the bottom to block the water inlet 8, thereby preventing the motor 4 from idling.
  • the top end of the pump body 1 is fixedly connected to a handle, which makes the use and handling of the submersible pump convenient.
  • the top end of the pump body 1 is further provided with a power line.
  • the power line passes through the pump body 1 and is electrically connected to the controller 11.
  • a connection between the power line and the pump body 1 is sealed to prevent liquid from entering the upper chamber of the pump body 1.
  • the present application provides another embodiment based on the above embodiment.
  • the switch 31 includes a conductive terminal, an elastic contact piece, a waterproof piece, and a movable button piece.
  • the indicator light 33 includes a base and a light-emitting diode (LED) lamp.
  • the elastic contact piece is located above the conductive terminal, and is spaced apart from the conductive terminal.
  • the conductive terminal extends from below the base to connect the liquid level sensor 32.
  • the LED lamp is located above the elastic contact piece.
  • a circuit board of the LED lamp is electrically connected to the conductive terminal, such that the LED lamp is electrically connected to the liquid level sensor 32.
  • the button piece is connected to the waterproof piece.
  • the waterproof piece is located above the LED lamp and connected to the elastic contact piece through the LED lamp.
  • the button piece is pressed to move the waterproof piece downward and press the elastic contact piece.
  • the elastic contact piece contacts the conductive terminal to make a circuit on.
  • the LED lamp lights up, and the liquid level sensor is powered on.
  • the present application provides another embodiment based on the above embodiment.
  • the switch 31 is electrically connected to the controller 11.
  • the indicator light 33 is electrically connected to the controller 11.
  • the switch 31 is electrically connected to the liquid level sensor 32.
  • the control principle of the sensing assembly is as follows: When any switch 31 is pressed, the liquid level sensor 32 electrically connected to the switch 31 forms a path and is turned on. When the liquid level sensor 32 is turned on, a characteristic signal is output to the controller 11.
  • the controller 11 receives, processes and recognizes the characteristic signal.
  • the controller 11 can recognize different characteristic signals sent by different liquid level sensors 32. After recognition, the controller outputs a feedback signal to the indicator light 33 corresponding to the on-state liquid level sensor 32.
  • the indicator light 33 lights up.
  • the liquid level sensor 32 corresponding to the switch 31 sends a characteristic signal to the controller 11.
  • the controller 11 recognizes the characteristic signal and outputs a feedback signal to the corresponding indicator light 33.
  • the indicator light 33 lights off.
  • this embodiment provides an automatic liquid level control method, which is applied to the submersible pump provided by the above embodiment.
  • the submersible pump includes two liquid level sensors 32 in an on state.
  • the liquid level sensors 32 include first liquid level sensor 321 and second liquid level sensor 322.
  • the first liquid level sensor 321 is provided at a position higher than the second liquid level sensor 322.
  • the first liquid level sensor 321 and the second liquid level sensor 322 are arranged from top to bottom on the control panel 2 of the pump body 1. When the submersible pump is used, the bottom surface of the foot fits the bottom of the liquid pool.
  • the method includes: The submersible pump is connected to a power supply and placed in the liquid pool.
  • the first liquid level sensor 321 detects a change from absence to presence of a liquid, and outputs a first signal to the signal processing module of the controller 11.
  • the signal processing module receives and recognizes the first signal, and outputs a third signal to the control module.
  • the control module controls the motor 4 to rotate, so as to control the submersible pump to start.
  • the first signal shows the change from absence to presence of a liquid detected by the first liquid level sensor 321 when the liquid level rises above the first liquid level sensor 321.
  • the third signal is an electrical signal for controlling the control module to start the motor 4.
  • the second liquid level sensor 322 detects the change from presence to absence of a liquid, and outputs a second signal to the signal processing module of the controller 11.
  • the signal processing module receives and recognizes the second signal, and outputs a fourth signal to the timing module.
  • the timing module receives the fourth signal and starts a countdown. The submersible pump remains on.
  • the countdown has a fixed duration that is at least one second.
  • the second signal shows the change from presence to absence of a liquid detected by the second liquid level sensor 322 when the liquid level drops below the second liquid level sensor 322.
  • the fourth signal is an electrical signal for controlling the timing module to start the countdown.
  • the timing module finishes the countdown and outputs a fifth signal to the signal processing module.
  • the signal processing module receives the fifth signal and outputs a sixth signal to the control module.
  • the control module receives the sixth signal and controls the submersible pump to turn off.
  • steps S1 to S3 are repeated.
  • the fifth signal is an electrical signal, which is a feedback signal showing that the timing module finishes the countdown, and enables the signal processing module to output the sixth signal to the control module.
  • the sixth signal is an electrical signal for controlling the control module to turn off the motor 4, thereby turning off the submersible pump.
  • the heights of the first liquid level sensor 321 and the second liquid level sensor 322 are adjustable. By turning on and off the sensing assemblies 3 at different heights, different liquid levels are controlled to adapt to different application scenarios.
  • the present application provides another embodiment based on the above embodiment.
  • the submersible pump includes a single liquid level sensor 32 in an on state.
  • the method includes: The submersible pump is connected to a power supply and placed in the liquid pool.
  • the liquid level sensor 32 detects a change from absence to presence of a liquid, and outputs a first signal to the signal processing module of the controller 11.
  • the signal processing module receives and recognizes the first signal, and outputs a third signal to the control module.
  • the control module controls the motor 4 to rotate, so as to control the submersible pump to start.
  • the first signal shows the change from absence to presence of a liquid detected by the liquid level sensor 32 when the liquid level rises above the liquid level sensor 32.
  • the third signal is an electrical signal for controlling the control module to start the motor 4.
  • the liquid level sensor 32 detects the change from presence to absence of a liquid, and outputs a second signal to the signal processing module of the controller 11.
  • the signal processing module receives and recognizes the second signal, and outputs a fourth signal to the timing module.
  • the timing module receives the fourth signal and starts a countdown. The submersible pump remains on.
  • the countdown has a fixed duration that is at least two seconds.
  • the second signal shows the change from presence to absence of a liquid detected by the liquid level sensor 32 when the liquid level drops below the liquid level sensor 32.
  • the fourth signal is an electrical signal for controlling the timing module to start the countdown.
  • the timing module finishes the countdown and outputs a fifth signal to the signal processing module.
  • the signal processing module receives the fifth signal and outputs a sixth signal to the control module.
  • the control module receives the sixth signal and controls the submersible pump to turn off.
  • steps S1 to S3 are repeated.
  • the fifth signal is an electrical signal, which is a feedback signal showing that the timing module finishes the countdown, and enables the signal processing module to output the sixth signal to the control module.
  • the sixth signal is an electrical signal for controlling the control module to turn off the motor 4, thereby turning off the submersible pump.
  • the heights of the liquid level sensor 32 are adjustable. By turning on and off the sensing assemblies 3 at different heights, different liquid levels are controlled to adapt to different application scenarios.
  • the present application provides another embodiment based on the above embodiment.
  • the controller 11 includes a signal processing module and a control module.
  • the submersible pump does not have a delayed turn-off function. After the controller receives the second signal, the controller immediately controls the motor to stop.
  • the method includes: The submersible pump is connected to a power supply and placed in the liquid pool.
  • the signal processing module of the controller 11 receives and recognizes a first signal, and outputs a feedback signal to the control module.
  • the control module controls the motor 4 to rotate, so as to control the submersible pump to start.
  • the signal processing module of the controller 11 receives and recognizes the second signal, and outputs a feedback signal to the control module.
  • the control module controls the motor 4 to stop, so as to control the submersible pump to be turned off.
  • steps S1 and S2 are repeated.
  • the present application provides another embodiment based on the above embodiment.
  • the submersible pump can simultaneously turn on at most two liquid level sensors 32 through the switch 31 on the sensing assembly 3.
  • the two liquid level sensors 32 are turned on by default and the indicator lights 33 on the liquid level sensors 32 are always on.
  • the switch 31 on any liquid level sensor 32 is pressed to turn on and off the liquid level sensor 32, so as to realize the automatic control of different user-defined liquid levels.
  • the position of the first level sensor 321 is higher than that of the second level sensor 322.
  • liquid level sensors 32 By turning on the liquid level sensors 32 at different heights or having different numbers, the automatic control of different liquid levels is realized, such that the submersible pump can adapt to many application scenarios.
  • the liquid level to be automatically controlled is different.
  • the submersible pump using the automatic liquid level control method can control the liquid level in different ranges to adapt to different use needs.
  • the present application provides another embodiment based on the above embodiment.
  • the submersible pump further includes manual on and off and delayed turn-off functions.
  • the submersible pump can be forced to be turned on and off manually when no liquid level sensor 32 is turned on.
  • Countdowns with different durations are preset in the timing module.
  • the submersible pump When no liquid level sensor 32 is turned on, the submersible pump outputs different signals through a program preset on the signal processing module after being manually turned on to apply countdowns of different durations. After the countdown, the control module controls the submersible pump to turn off, so as to realize the delayed turn-off function.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
EP22214281.2A 2022-08-24 2022-12-16 Submersible pump and automatic liquid level control method Pending EP4328452A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211016262.8A CN115306734A (zh) 2022-08-24 2022-08-24 一种潜水泵及自动控制液位的方法

Publications (1)

Publication Number Publication Date
EP4328452A1 true EP4328452A1 (en) 2024-02-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22214281.2A Pending EP4328452A1 (en) 2022-08-24 2022-12-16 Submersible pump and automatic liquid level control method

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EP (1) EP4328452A1 (zh)
CN (1) CN115306734A (zh)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20130025A1 (it) * 2013-01-10 2014-07-11 Liliana Combi Pompa sommergibile perfezionata con campo di funzionamento regolabile
WO2015080886A2 (en) * 2013-11-26 2015-06-04 Cummings Eugene M Test and monitoring system for a sump pump installation having a self-monitoring valve module for admitting water to the sump pit
CN213331574U (zh) 2020-09-07 2021-06-01 江苏海澄水工机械有限公司 一种潜水泵缺水保护装置
EP3875765A1 (en) * 2020-03-02 2021-09-08 Husqvarna Ab Submersible pump with touch sensitive sensors
EP3945214A1 (en) * 2020-07-28 2022-02-02 Husqvarna Ab Control interface of a pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20130025A1 (it) * 2013-01-10 2014-07-11 Liliana Combi Pompa sommergibile perfezionata con campo di funzionamento regolabile
WO2015080886A2 (en) * 2013-11-26 2015-06-04 Cummings Eugene M Test and monitoring system for a sump pump installation having a self-monitoring valve module for admitting water to the sump pit
EP3875765A1 (en) * 2020-03-02 2021-09-08 Husqvarna Ab Submersible pump with touch sensitive sensors
EP3945214A1 (en) * 2020-07-28 2022-02-02 Husqvarna Ab Control interface of a pump
CN213331574U (zh) 2020-09-07 2021-06-01 江苏海澄水工机械有限公司 一种潜水泵缺水保护装置

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