Submersible pump and method for automatic control of liquid level

Abstract

A kind of submersible pump, comprising: pump body, the control panel is provided on the pump body;Controller, at least two sensing components are electrically connected to the controller;Sensing component, the sensing component includes liquid level sensor, indicator light and switch;The switch is arranged on the control panel, and switch is used to open and close liquid level sensor;The indicator light is used to show the opening and closing state of liquid level sensor;The liquid level sensor is arranged on the side of pump body, and liquid level sensor is arranged at different heights on the pump body;The submersible pump can be opened up to two liquid level sensors simultaneously by switch, and the height of liquid level detection can be changed by opening and closing liquid level sensors of different heights.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of automatic submersible pumps, in particular to a submersible pump and a method for automatically controlling liquid level. BACKGROUND

[0002] The submersible pump is an important equipment for deep well water lifting. When in use, the entire unit is submerged in water to work, and underground water is extracted to the ground surface. It is widely used in domestic water, mine rescue, industrial cooling, farmland irrigation, seawater lifting and ship loading, and can also be used for fountain landscape.

[0003] A submersible pump water shortage protection device is disclosed in a Chinese patent (authorized publication number CN 213331574 U), which comprises a cylinder, a second water outlet pipe and a second water inlet pipe are arranged at the top of the cylinder, a second soft long pipe is communicated at the top of the second water outlet pipe, a stop valve is arranged on the second water inlet pipe, a submersible pump body is arranged at the bottom of the inner cavity of the cylinder, a first water outlet pipe is arranged at the top output end of the submersible pump body, a first soft long pipe is communicated between the first water outlet pipe and the second water outlet pipe, a cable is arranged at the right side of the submersible pump body, a second water level sensor is arranged on the left side wall of the inner cavity of the cylinder and located at the top of the submersible pump body, a first water level sensor is arranged on the right side wall of the inner cavity of the cylinder and located above the second water level sensor, a first water inlet pipe is arranged at the bottom of the circumferential outer wall of the cylinder, and an electromagnetic valve is arranged on the first water inlet pipe. The utility model has the advantages of reasonable structure design, convenient protection during submersible pump operation, avoidance of idling work, and improvement of service life.

[0004] The position of the first liquid level sensor and the second liquid level sensor in the prior art is fixed. In actual use, the liquid level height to be controlled is different according to different use environments and liquid pool shapes. The above-mentioned submersible pump cannot change the height of the liquid level sensor according to actual needs. Secondly, the liquid level sensor in the prior art does not have a state indicating lamp, so the state of the liquid level sensor cannot be directly observed. When not used for a long time, the user is easy to forget which liquid level sensor is turned on. Finally, the submersible pump in the above-mentioned patent file only has a delay closing function and cannot automatically control the liquid level. SUMMARY

[0005] The present application aims to provide a submersible pump and a method for automatically controlling liquid level to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] In a first aspect, the present application provides a submersible pump, comprising:

[0008] A pump body, wherein a control panel is arranged on the pump body;

[0009] A controller, wherein the controller is electrically connected with at least two sensing components;

[0010] The sensing components include a liquid level sensor, an indicator light and a switch;

[0011] The switch is arranged on the control panel, and the switch is used to start and stop the liquid level sensor;

[0012] The indicator light is used to display the start and stop state of the liquid level sensor;

[0013] The liquid level sensor is arranged on the side of the pump body, and the liquid level sensors arranged on the pump body are arranged at different heights.

[0014] The submersible pump can start at most two liquid level sensors at the same time through the switch, and the height of the liquid level detection can be changed by starting and stopping the liquid level sensors at different heights.

[0015] According to the embodiment of the application, the controller includes a signal processing module and a control module; the control module is electrically connected with the signal processing module, and the signal processing module is electrically connected with the liquid level sensor.

[0016] According to the embodiment of the application, the cavity of the pump body is provided with a motor, the motor is electrically connected with the control module, and the control module is used to control the start and stop of the motor.

[0017] According to the embodiment of the application, the controller further includes a timing module, and the timing module is electrically connected with the signal processing module.

[0018] In the second aspect, the application provides a method for automatically controlling the liquid level, which is based on the submersible pump in any one of the above aspects, and the steps include:

[0019] The liquid level sensor outputs a first signal to the controller, the controller executes a start program, and the submersible pump is started;

[0020] The liquid level sensor outputs a second signal to the controller, the controller executes a stop program, and the submersible pump is stopped.

[0021] According to the embodiment of the application,

[0022] The first signal is a signal detected by the liquid level sensor when the liquid changes from nothing to something;

[0023] The second signal is a signal detected by the liquid level sensor when the liquid changes from something to nothing.

[0024] According to the embodiment of the application, the liquid level sensor includes a first liquid level sensor and a second liquid level sensor, and the first liquid level sensor is arranged higher than the second liquid level sensor.

[0025] According to the embodiment of the present application,

[0026] The first signal is a signal detected by the first liquid level sensor when liquid changes from nothing to something.

[0027] The second signal is a signal detected by the second liquid level sensor when liquid changes from something to nothing.

[0028] According to the embodiment of the present application,

[0029] The timing module is used for counting down.

[0030] The signal processing module is used for receiving, processing and transmitting signals.

[0031] The control module is used for controlling the opening and closing of the motor, thereby controlling the opening and closing of the submersible pump.

[0032] According to the embodiment of the present application, the starting procedure is:

[0033] After the signal processing module receives the first signal, the signal processing module outputs a third signal to the control module, and the control module starts the motor.

[0034] The third signal is a feedback signal of the signal processing module after receiving the first signal, which is used for controlling the control module to start the motor, thereby starting the submersible pump.

[0035] According to the embodiment of the present application, the closing procedure is:

[0036] After the signal processing module receives the second signal, the signal processing module outputs a fourth signal to the timing module, and the timing module starts counting down. After the counting down is completed, the timing module 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, and the control module stops the motor.

[0037] The fourth signal is a feedback signal of the signal processing module after receiving the second signal, which is used for controlling the timing module to start counting down.

[0038] The fifth signal is a feedback signal of the timing module when the counting down is terminated.

[0039] The sixth signal is a feedback signal of the signal processing module after receiving the fifth signal, which is used for controlling the control module to stop the motor, thereby stopping the submersible pump.

[0040] According to the embodiment of the present application,

[0041] The height of the liquid level sensor used for outputting the first signal or the second signal can be changed by turning on or off the sensing components at different heights.

[0042] The countdown is used for the signal processing module to receive the second signal, and the submersible pump continues to work for a period of time.

[0043] The countdown is set to at least one second.

[0044] The above embodiments can be arbitrarily combined.

[0045] In summary, the present application includes at least one of the following beneficial technical effects:

[0046] 1. The submersible pump includes a sensing assembly that can be manually turned on and off. When the use environment and the size of the liquid pool are different, the height of the liquid level to be controlled is different. The submersible pump of the present application can set different opening liquid levels and closing liquid levels to meet different use requirements.

[0047] 2. The sensing assembly is provided with an indicator light for displaying the state of the liquid level sensor, so that the on-off state of the liquid level sensor can be more intuitively distinguished by the user, reducing errors in use.

[0048] 3. The controller is provided with a timing module, which can delay the closing of the submersible pump to prevent damage caused by motor idling and prolong the service life; at the same time, it can also prevent incomplete pumping and cause waste of residual liquid to be pumped.

[0049] 4. The submersible pump for automatically controlling the liquid level in the present application has many functions, including:

[0050] (1) Automatically control the opening and closing of the submersible pump.

[0051] (2) The liquid level can be automatically controlled, and the liquid can be pumped when the liquid level is too high, and the pumping can be stopped when the liquid level is too low; the height of the detected liquid level can be manually switched by a switch.

[0052] (3) The automatically controlled liquid level can be a fixed liquid level or a range to adapt to different application scenarios.

[0053] (4) The method of automatically controlling the liquid level can be used as a protection function, and when the liquid level is higher or lower than the limit liquid level, it can be forced to start or stop to prevent errors of the submersible pump when the remaining liquid level sensor fails. BRIEF DESCRIPTION OF DRAWINGS

[0054] The present application will be described in further detail below in conjunction with the accompanying drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be considered as limiting the scope of the present application. In addition, unless specifically indicated, the drawings only schematically represent the composition or structure of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0055] Figure 1 is a schematic diagram of the internal structure of a submersible pump provided in an embodiment of the present application;

[0056] Figure 2 is a schematic diagram of the external structure of a submersible pump provided in an embodiment of the present application;

[0057] Figure 3 is Figure 1 an enlarged view of region A in FIG.

[0058] Figure 4 is a principle of a method for automatically controlling liquid level provided in an embodiment of the present application Figure 1 ;

[0059] Figure 5 is a principle of a method for automatically controlling liquid level provided in an embodiment of the present application Figure 2

[0060] Figure 6 is a flowchart of a method for automatically controlling liquid level provided in an embodiment of the present application.

[0061] In the figure: 1, pump body; 2, control panel; 3, sensing assembly; 31, switch; 32, liquid level sensor; 321, first liquid level sensor; 322, second liquid level sensor; 33, indicator light; 4, motor; 5, motor shaft; 6, coupling; 7, impeller; 8, water inlet; 9, water outlet pipe; 10, diffuser chamber; 11, controller; 12, foot. DETAILED DESCRIPTION

[0062] In order for those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and do not limit the present disclosure.

[0063] In the description of the present application, if the first, second, etc. are described for the purpose of distinguishing technical features, they should not be understood as indicating or implying relative importance or implying the number of technical features indicated or the order of the technical features indicated.

[0064] Those skilled in the art should understand that in the disclosure of the present application, the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as limiting the present application.

[0065] Embodiment One

[0066] Please refer to Figures 1-2 In this embodiment, a submersible pump is provided, comprising: a pump body 1, a control panel 2, a sensing assembly 3 and a controller 11.

[0067] The inner cavity of the pump body 1 is provided with an upper chamber and a lower chamber from top to bottom, and a partition is arranged between the upper chamber and the lower chamber.

[0068] The control panel 2 is arranged on the side of the pump body 1, and the control panel 2 is electrically connected with at least two sensing assemblies 3, and the sensing assemblies 3 are arranged on the control panel 2 at different heights.

[0069] The sensing assembly 3 comprises a liquid level sensor 32, an indicator light 33 and a switch 31; the switch 31 is a push switch 31 arranged on the control panel 2 and electrically connected with the liquid level sensor 32, and the switch 31 is used to start and stop the liquid level sensor 32; the indicator light 33 is used to display the start and stop state of the liquid level sensor, and at least includes the working states of constant light and flashing.

[0070] The liquid level sensor 32 adopts a non-contact liquid level sensor 32, which can detect the change of liquid height and output a signal to the controller 11.

[0071] The top end of the upper chamber of the pump body 1 is provided with the controller 11, and the controller 11 is electrically connected with the liquid level sensor 32, and the controller 11 internally comprises a signal processing module, a control module and a timing module; the timing module is electrically connected with the signal processing module, the control module is also electrically connected with the signal processing module, and the signal processing module is electrically connected with the liquid level sensor 32.

[0072] The controller 11 can also be installed inside the control panel 2, and the controller 11 is directly electrically connected with the liquid level sensor 32.

[0073] The timing module is used for countdown, and the countdown is set so that when the liquid surface drops below the second liquid level sensor 322, the submersible pump continues to work for a period of time.

[0074] The signal processing module is used for receiving and outputting signals; and the control module is used for controlling the rotation or stop of the motor 4, so as to control the start or stop of the submersible pump.

[0075] The upper chamber of the pump body 1 is also provided with a motor 4, and the motor 4 is installed below the controller 11, and the motor 4 is electrically connected with the controller 11.

[0076] The liquid level sensor 32 is turned on by pressing the switch 31, and the corresponding indicator light 33 is turned on. When the liquid level sensor 32 in the sensing assembly 3 senses a change in the liquid level, a corresponding change signal is generated. The change signal is transmitted to the signal processing module of the controller 11. The signal processing module receives the signal and outputs the signal to the control module or the timing module, thereby realizing automatic sensing and control of the submersible pump.

[0077] Embodiment Two

[0078] Please refer to Figures 1-2 On the basis of the embodiment one of the present application, another embodiment is provided.

[0079] The bottom end of the motor 4 extends a motor shaft 5, which extends through the partition of the inner cavity of the pump body 1 to the lower chamber. Preferably, the motor shaft 5 is made of a metal material that is resistant to corrosion and torsion. The bottom end of the motor shaft 5 is sleeved with a coupling 6, which is connected to the motor shaft 5 by means of positioning screws.

[0080] The lower chamber of the pump body 1 is provided with an impeller 7, which includes a shaft and a plurality of blades. The blades are arc-shaped and integrally formed with the shaft. The integrated design can enhance the strength of the impeller 7, making it safer during high-speed rotation and preventing the blades from falling off or flying out.

[0081] The impeller 7 is arranged at the bottom end of the motor 4 and is fixed to the bottom end of the coupling 6 by means of bolts. The impeller 7 is connected to the motor 4 through the coupling 6. When the motor 4 rotates, it drives the motor shaft 5 to rotate, thereby driving the coupling 6 and the impeller 7 to rotate together.

[0082] The pump body 1 also includes a water inlet 8 and a water outlet pipe 9. The water inlet 8 is arranged on the bottom surface of the pump body 1 and connects the external environment to the lower chamber of the pump body 1.

[0083] The water outlet pipe 9 is arranged on the side surface of the pump body 1. The top end of the water outlet pipe 9 is provided with a water outlet. The inner cavity of the water outlet pipe 9 is connected to the lower chamber. The liquid enters the lower chamber from the water inlet 8, reaches the water outlet pipe 9, and is finally sprayed out of the water outlet.

[0084] Further, the water outlet pipe 9 is a three-section stepped structure, and the pipe diameter decreases from bottom to top. By providing a water outlet pipe 9 with different pipe diameters, the submersible pump can be adapted to different pipe diameters, making it more widely applicable.

[0085] The pump body 1 further comprises a diffusion chamber 10, which is arranged between and communicated with the lower chamber and the water outlet pipe 9. The diffusion chamber 10 is used to slow down the speed of the liquid, thereby further increasing the hydraulic pressure of the liquid, so that the liquid is more easily pumped out.

[0086] After the liquid enters the lower chamber, the impeller 7 rotates at high speed, and the liquid in the impeller 7 rotates together with the blades of the impeller 7. Under the action of centrifugal force, the liquid is ejected outward from the impeller 7. The ejected liquid gradually slows down in the diffusion chamber 10 of the pump body 1, and the pressure gradually increases, and then flows out from the water outlet pipe 9.

[0087] At the same time, a vacuum low-pressure area without air and liquid is formed at the center of the shaft of the impeller 7 due to the liquid being thrown to the surrounding. The liquid in the pool flows into the pump through the water inlet 8 under the action of the atmospheric pressure on the pool surface, thereby realizing circulation.

[0088] Example Three

[0089] Please refer to Figures 1-2 On the basis of the above-mentioned embodiment, another embodiment is provided.

[0090] The bottom end of the pump body 1 is further provided with a bottom foot 12, which is fixed to the bottom end of the pump body 1 by bolt connection. The bottom foot 12 comprises a support frame and a bottom plate, which are fixed by bolt connection. The bottom plate is used to fit the bottom of the pool when the submersible pump is placed, so that the submersible pump is more stable and not easy to be tilted. Hollows are formed on the side surface of the support frame at symmetrical positions, so that the liquid can enter the bottom foot 12 from the pool, and then enter the pump body 1 from the water inlet 8. The bottom foot 12 can raise the height of the pump body 1 from the bottom of the pool, prevent the pump body 1 from sinking to block the water inlet 8, and further prevent the motor 4 from idling.

[0091] The top end of the pump body 1 is fixedly connected with a handle, which makes the use and carrying of the submersible pump more convenient.

[0092] The top end of the pump body 1 is further provided with a power cord, which is electrically connected with the controller 11 by penetrating the pump body 1. The connection between the power cord and the pump body 1 is sealed to prevent liquid from entering the upper chamber of the pump body 1.

[0093] Example Four

[0094] Please refer to Figure 3 On the basis of the above-mentioned embodiment, another embodiment is provided.

[0095] The switch 31 and the indicator light 33 are selected from the prior art light touch switch 31 with the indicator light 33; the switch 31 comprises a conductive terminal, an elastic contact piece, a waterproof part and a movable button part; the indicator light 33 comprises a base and an LED light; the elastic contact piece is located above the conductive terminal and has a gap with the conductive terminal, and the conductive terminal extends from below the base to connect the liquid level sensor 32. The LED light is located above the elastic contact piece, and the LED light circuit board is electrically connected with the conductive terminal, so as to realize the electrical connection between the LED light and the liquid level sensor 32. The button part is connected with the waterproof part, the waterproof part is located above the LED light and connected with the elastic contact piece through the LED light, and when the button key is pressed, the waterproof part moves downward to press the elastic contact piece, so that the elastic contact piece and the conductive terminal are in contact to realize the circuit conduction, the LED light is turned on, and the liquid level sensor is powered on at the same time.

[0096] Example five

[0097] Please refer to Figure 3 On the basis of the above-mentioned embodiments, another embodiment is provided.

[0098] The switch 31 is electrically connected with the controller 11, the indicator light 33 is also electrically connected with the controller 11, the switch 31 is electrically connected with the liquid level sensor 32, and the control principle of the sensing assembly is:

[0099] When any one of the switches 31 is pressed, the liquid level sensor 32 electrically connected with 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, and the controller 11 receives and processes the characteristic signal and identifies it; the controller 11 can identify different characteristic signals emitted by different liquid level sensors 32, and after the identification is completed, a feedback signal is output to the indicator light 33 corresponding to the turned-on liquid level sensor 32, and the indicator light 33 is turned on.

[0100] When any one of the switches 31 is exited, the liquid level sensor 32 corresponding to the switch 31 also emits a characteristic signal to the controller 11, the controller 11 identifies it and outputs a feedback signal to the corresponding indicator light 33, and the indicator light 33 is turned off.

[0101] Example six

[0102] Please refer to Figures 4-6The embodiment provides a method for automatically controlling liquid level, which is applied to the submersible pump provided in the above embodiment and comprises two opened liquid level sensors 32, the liquid level sensors 32 comprise a first liquid level sensor 321 and a 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 a control panel 2 of the pump body 1, and the first liquid level sensor 321 is arranged higher than the second liquid level sensor 322; when the submersible pump is used, the bottom surface of the bottom foot is placed in close contact with the pool bottom of the liquid pool.

[0103] The step comprises:

[0104] After the submersible pump is powered on and placed in the liquid pool.

[0105] S1: when the liquid level in the liquid pool rises and exceeds the first liquid level sensor 321, the first liquid level sensor 321 detects the change from no liquid to liquid, outputs a first signal to a signal processing module of the controller 11, the signal processing module receives the first signal, recognizes and outputs a third signal to a control module, the control module controls the motor 4 to rotate, thereby controlling the submersible pump to start;

[0106] The first signal is the change from no liquid to liquid on the first liquid level sensor 321 when the liquid surface rises and exceeds the first liquid level sensor 321; the third signal is an electric signal and is used for controlling the control module to start the motor 4.

[0107] S2: when the liquid level drops and passes through the second liquid level sensor 322, the second liquid level sensor 322 detects the change from liquid to no liquid, outputs a second signal to the signal processing module of the controller 11, the signal processing module receives the second signal, recognizes and outputs a fourth signal to a timing module, the timing module receives the fourth signal and starts countdown; at this time, the submersible pump continues to be turned on.

[0108] The duration of the countdown is fixed and is at least one second.

[0109] The second signal is the change from liquid to no liquid on the second liquid level sensor 322 when the liquid surface drops and passes through the second liquid level sensor 322, and the fourth signal is an electric signal and is used for controlling the timing module to start countdown.

[0110] S3: the timing module ends the countdown, outputs a fifth signal to the signal processing module; the signal processing module receives the fifth signal and simultaneously outputs a sixth signal to the control module; the control module receives the sixth signal and controls the submersible pump to be turned off.

[0111] After the submersible pump is turned off, when the liquid level rises to exceed the first liquid level sensor 321, the cycle steps S1-S3 are performed.

[0112] The fifth signal is an electrical signal, and the fifth signal is a feedback signal when the countdown of the timing module ends, and the fifth signal can enable the signal processing module to output a sixth signal to the control module.

[0113] The sixth signal is an electrical signal, and is used to control the control module to turn off the motor 4, thereby turning off the submersible pump.

[0114] The height of the first liquid level sensor 321 and the second liquid level sensor 322 can be changed, and by opening and closing the sensing assembly 3 at different heights, liquid level control at different heights can be realized to adapt to different application scenarios.

[0115] Embodiment Seven

[0116] Please refer to Figures 4-6 On the basis of the above embodiments, another embodiment is provided.

[0117] The method for automatically controlling the liquid level only includes a single liquid level sensor 32 in an open state.

[0118] The steps include:

[0119] After the submersible pump is turned on, it is placed in the liquid pool.

[0120] S1: When the liquid level in the liquid pool rises and exceeds the liquid level sensor 32, the liquid level sensor 32 detects the change from no liquid to liquid, and outputs a first signal to the signal processing module of the controller 11. After the signal processing module receives the first signal, a third signal is recognized and output to the control module. The control module controls the motor 4 to rotate, thereby controlling the submersible pump to start;

[0121] The first signal is the change from no liquid to liquid on the liquid level sensor 32 when the liquid level rises to exceed the liquid level sensor 32; and the third signal is an electrical signal and is used to control the control module to start the motor 4.

[0122] S2: When the liquid level drops through the liquid level sensor 32, the liquid level sensor 32 detects the change from liquid to no liquid, and outputs a second signal to the signal processing module of the controller 11. After the signal processing module receives the second signal, a fourth signal is recognized and output to the timing module. After the timing module receives the fourth signal, the countdown starts; at this time, the submersible pump continues to be turned on.

[0123] The duration of the countdown is fixed and at least two seconds.

[0124] The second signal is the change of the signal on the liquid level sensor 32 from liquid to no liquid when the liquid level drops to pass the liquid level sensor 32, and the fourth signal is an electrical signal and is used to control the timing module to start the countdown.

[0125] S3: The timing module ends the countdown, and outputs a fifth signal to the signal processing module; after receiving the fifth signal, the signal processing module outputs a sixth signal to the control module, and after receiving the sixth signal, the control module controls the submersible pump to stop;

[0126] After the submersible pump is stopped, when the liquid level rises to exceed the liquid level sensor 32, the steps S1-S3 are repeated.

[0127] The fifth signal is an electrical signal, the fifth signal is a feedback signal when the timing module ends the countdown, and the fifth signal can make the signal processing module output a sixth signal to the control module.

[0128] The sixth signal is an electrical signal and is used to control the control module to stop the motor 4, thereby stopping the submersible pump.

[0129] The height of the liquid level sensor 32 can be changed, and by starting and stopping the sensing assembly 3 at different heights, the liquid level control at different heights can be realized to adapt to different application scenarios.

[0130] Embodiment Eight

[0131] Please refer to Figure 4 On the basis of the above-mentioned embodiments, another embodiment is provided.

[0132] The controller 11 only includes a signal processing module and a control module, and the submersible pump does not include a delay shutdown function, and after the controller receives the second signal, the controller controls the motor to stop immediately.

[0133] The steps include:

[0134] After the submersible pump is powered on, it is placed in the liquid pool.

[0135] S1: After the signal processing module of the controller 11 receives the first signal, a feedback signal is recognized and output to the control module, and the control module controls the motor 4 to rotate, thereby controlling the submersible pump to start;

[0136] S2: After the signal processing module of the controller 11 receives the second signal, a feedback signal is recognized and output to the control module, and the control module controls the motor 4 to stop rotating, thereby controlling the submersible pump to stop;

[0137] After the submersible pump is stopped, when the liquid level rises to exceed the liquid level sensor 32, the steps S1-S2 are repeated.

[0138] Embodiment Nine

[0139] Please refer to Figures 1-6 On the basis of the above embodiment, another embodiment is provided.

[0140] The submersible pump can simultaneously turn on at most two liquid level sensors 32 through the switch 31 on the sensing assembly 3.

[0141] When the submersible pump is powered on for the first time, two liquid level sensors 32 are turned on by default, and the indicator light 33 on the liquid level sensor 32 is always on; by pressing the switch 31 on any liquid level sensor 32, the corresponding liquid level sensor 32 can be turned on and off, thereby realizing automatic control of different height liquid levels, at this time the first liquid level sensor 321 is set to be higher than the second liquid level sensor 322.

[0142] When only one liquid level sensor 32 is turned on on the submersible pump, the indicator light 33 on the switch 31 of the sensing assembly 3 flashes when it is pressed alone; when only a single liquid level sensor 32 is turned on, in any working state, pressing the switch 31 of the other sensing assembly 3 can make the submersible pump return to the state of turning on two liquid level sensors 32.

[0143] By pressing the switch 31 to turn on liquid level sensors 32 of different heights and different numbers, different automatic control liquid level methods are realized, so that the submersible pump is adapted to more application scenarios.

[0144] When the environment used is different, the height of the liquid level that wants to be automatically controlled is also different, and the submersible pump provided with the application automatic control liquid level method can control the liquid level in different height ranges to adapt to different use requirements.

[0145] Embodiment ten

[0146] Please refer to Figures 1-6 On the basis of the embodiment of the present application, another embodiment is provided.

[0147] The function of the submersible pump further includes manual turning on and off and timing off.

[0148] The submersible pump can be manually forced to turn on and off, at this time no liquid level sensor 32 is turned on.

[0149] The timing module has preset countdowns of different lengths, when no liquid level sensor 32 is turned on, the submersible pump can apply countdowns of different lengths by outputting different signals through the preset program on the signal processing module after being manually turned on, and after the countdown is over, the control module controls the submersible pump to turn off, thereby realizing the function of timing off.

[0150] The application is described in detail above, and the principles and implementation manners of the application are described by applying specific examples. The above description of the examples is only used to help understand the application and the core idea. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and modifications can be made to the application without departing from the principles of the application, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A method for automatically controlling liquid level, comprising a submersible pump, characterized in that, The submersible pump includes: Pump body (1), wherein a control panel (2) is provided on the pump body (1); The controller (11) is electrically connected to at least two sensing components (3). The sensing component (3) includes a liquid level sensor (32), an indicator light (33) and a switch (31), wherein the indicator light (33) includes a constant light and a flashing working state; The switch (31) is located on the control panel (2) and is used to turn the liquid level sensor (32) on and off. The indicator light (33) is used to display the on / off status of the liquid level sensor (32); The liquid level sensor (32) is set on the side of the pump body (1), and the liquid level sensors (32) are arranged at different heights on the pump body (1); The steps include: The liquid level sensor (32) outputs a first signal to the controller (11), and the controller (11) executes the start-up program, and the submersible pump is turned on; The level sensor (32) outputs a second signal to the controller (11), and the controller (11) executes the shutdown procedure, and the submersible pump is shut down; When the submersible pump is powered on for the first time, the two level sensors (32) are turned on by default, and the indicator light (33) is always on. Pressing the switch (31) on any level sensor (32) once controls the opening and closing of the corresponding level sensor (32). When a level sensor (32) is turned on alone, the indicator light (33) on it flashes. In any working state, by pressing the switch (31) on other sensing components (3), the submersible pump can be restored to the state of turning on both level sensors (32).

2. The method for automatically controlling liquid level according to claim 1, characterized in that, The controller (11) includes a signal processing module and a control module; the signal processing module and the control module are electrically connected, and the signal processing module is electrically connected to the liquid level sensor (32).

3. The method for automatically controlling liquid level according to claim 2, characterized in that, The pump body (1) has a motor (4) installed inside its cavity. The motor (4) is electrically connected to the control module. The control module is used to control the opening and closing of the motor (4).

4. The method for automatically controlling liquid level according to claim 3, characterized in that, The controller (11) further includes a timing module, which is electrically connected to the signal processing module.

5. The method for automatically controlling liquid level according to claim 1, characterized in that, The first signal is the signal of liquid change from nothing to something detected by the liquid level sensor (32); The second signal is the signal of liquid change from present to absent detected by the liquid level sensor (32).

6. The method for automatically controlling liquid level according to claim 1, characterized in that, The liquid level sensor (32) includes a first liquid level sensor (321) and a second liquid level sensor (322), wherein the first liquid level sensor (321) is configured to be higher than the second liquid level sensor (322).

7. The method for automatically controlling liquid level according to claim 6, characterized in that, The first signal is the signal of liquid change from nothing to something detected by the first liquid level sensor (321); The second signal is the signal detected by the second liquid level sensor (322) of the liquid changing from present to absent.

8. The method for automatically controlling liquid level according to claim 5 or 7, characterized in that, The signal processing module is used to receive, process, and transmit signals; The control module is used to control the start and stop of the motor (4), thereby controlling the start and stop of the submersible pump.

9. The method for automatically controlling liquid level according to claim 8, characterized in that, The startup procedure is as follows: After receiving the first signal, the signal processing module outputs the third signal to the control module; the control module starts the motor (4). The third signal is the feedback signal after the signal processing module receives the first signal, and is used to control the control module to start the motor (4).

10. The method for automatically controlling liquid level according to claim 9, characterized in that, The shutdown procedure is as follows: After receiving the second signal, the signal processing module outputs the fourth signal to the timing module, and the timing module starts counting down; after the countdown ends, the timing module outputs the fifth signal to the signal processing module, the signal processing module receives the fifth signal and outputs the sixth signal to the control module; the control module shuts down the motor (4). The fourth signal is a feedback signal received by the signal processing module after receiving the second signal, which is used to control the timing module to start the countdown; The fifth signal is the feedback signal when the countdown of the timing module ends; The sixth signal is a feedback signal received by the signal processing module after receiving the fifth signal, and is used to control the control module to stop the motor (4).

11. The method for automatically controlling liquid level according to claim 10, characterized in that, By turning the liquid level sensor (32) on and off at different heights, the height of the first signal or the second signal detected by the liquid level sensor (32) can be changed. The countdown timer is used so that the submersible pump continues to operate for a period of time after the signal processing module receives the second signal; The countdown timer is set to at least one second.

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