Pump having multiple control methods

Abstract

A pump having multiple control methods, comprising: an external communication module, a switching module, and a control module. The external communication module is connected to the control module, and is configured to receive an external control signal sent by an external controller and transmit the external control signal to the control module; the switching module is connected to the control module, and is configured to acquire a control method switching operation of a user and transmit a control method switching signal to the control module; and the control module is configured to determine, on the basis of whether the external control signal is received and whether the control method switching signal is received, to control the pump to operate on the basis of a preset gear in the control module or control the pump to operate on the basis of the external control signal. The pump acquires the control method switching operation of the user by the switching module, thereby ensuring the reliability of control method switching. The user can select different control methods, so that the pump can meet the control requirements for the pump in different application scenarios.

Description

Pump with multiple control modes

[0001] Cross-reference to Related Applications

[0002] This application claims priority to the Chinese patent application with the application date of June 21, 2024, the application number of 2024108171416, the entire contents of which are incorporated herein by reference. TECHNICAL FIELD

[0003] The present application relates to the technical field of pumps, in particular to a pump with multiple control modes. BACKGROUND

[0004] Pumps are applied to various fluid conveying occasions, and different application occasions have different requirements for the control mode of the pump.

[0005] In the prior art, multiple user-manually-controllable gears can be provided in the driver of the pump, such as constant speed gear, constant pressure gear and proportional pressure gear, and multiple constant speed curves, constant pressure curves and proportional pressure curves can be built in the pump. The pump can also have self-learning capability to automatically match the rated value parameters of the pump operation with the equipment. For example, when the pump is applied to a heating device, the automatic learning can adjust the pump in a more ideal way according to the requirements of the heating device, and thus can work in a situation-matched manner with relatively less electric energy.

[0006] On the other hand, when the pump is applied to a fluid circulation system, an external controller for controlling the pump speed can be provided in the system for the convenience of system control. The external controller is used to send an external control signal to the pump to control the pump speed, for example, the external control signal can be sent in the form of pulse-width modulation (PWM). This requires that the pump must be able to meet the requirements of different control modes and ensure the reliability of the control mode switching. SUMMARY

[0007] The purpose of the present application is to provide a pump with multiple control modes, so that the pump can adapt to different control modes in different application occasions, and can reliably switch between different control modes.

[0008] To achieve the above-mentioned purpose, the embodiments of the present application provide a pump with multiple control modes, comprising: an external communication module, a switching module and a control module,

[0009] The external communication module is connected with the control module and is configured to receive the external control signal sent by the external controller and transmit it to the control module;

[0010] The switching module is connected with the control module and is configured to acquire a control mode switching operation of a user and transmit a control mode switching signal to the control module;

[0011] The control module is configured to determine whether to control the pump to work according to a preset gear in the control module or to control the pump to work according to an external control signal according to whether the external control signal is received and whether the control mode switching signal is received.

[0012] Optionally, the switching module comprises a first key assembly connected with a first gear switching input end of the control module.

[0013] The control module is configured to determine whether the external control signal is acquired if a first preset key signal of the first key assembly is received, and control the pump to switch to an external control gear and control the pump speed according to the acquired external control signal if the external control signal is acquired.

[0014] Optionally, the switching module further comprises a switch assembly arranged in a signal transmission line between the external communication module and the control module.

[0015] The control module is configured to determine whether the external control signal is acquired, and control the pump to switch to an external control gear and control the pump speed according to the acquired external control signal if the external control signal is acquired.

[0016] Optionally, the switching module further comprises a second key assembly connected with a second gear switching input end of the control module.

[0017] The control module is configured to determine whether the external control signal is acquired if a second preset key signal of the second key assembly is received, and control the pump to switch to an external control gear and control the pump speed according to the acquired external control signal if the external control signal is acquired.

[0018] Optionally, the external communication module comprises:

[0019] The PWM receiving unit comprises a second optocoupler, a second resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first triode and a second triode.

[0020] One end of the sixth resistor and one end of the seventh resistor are connected with an input port of the interface unit and are electrically connected with a first end of the second optocoupler, the other end of the sixth resistor is electrically connected with a collector of the first triode and a base of the second triode respectively, the other end of the seventh resistor is electrically connected with a collector of the second triode, one end of the second resistor and a second end of the second optocoupler respectively, and the other end of the second resistor is connected with an emitter of the second triode.

[0021] The fifth resistor is electrically connected in parallel with the ninth capacitor, one end of the fifth resistor is electrically connected with the emitter of the first triode and the analog ground wire, and the other end of the fifth resistor is electrically connected with the base of the first triode and the emitter of the second triode;

[0022] The sixth end of the second optocoupler is electrically connected with the power supply, one end of the tenth capacitor and one end of the eighth resistor, the fifth end of the second optocoupler is electrically connected with the other end of the tenth capacitor and the ground wire, and the fourth end of the second optocoupler is electrically connected with the other end of the eighth resistor, one end of the eleventh capacitor and the signal input end of the control module.

[0023] Optionally, the external communication module further comprises:

[0024] The PWM sending unit comprises a third resistor, a fourth resistor, a seventh capacitor, an eighth capacitor and a first optocoupler;

[0025] One end of the third resistor is electrically connected with one end of the seventh capacitor and the output port of the interface unit, the other end of the third resistor is electrically connected with the first pin of the first optocoupler, and the other end of the seventh capacitor is electrically connected with the second pin of the first optocoupler and the analog ground wire;

[0026] One end of the fourth resistor is electrically connected with one end of the eighth capacitor and the signal output end of the control module, and the other end of the fourth resistor is electrically connected with the third pin of the first optocoupler;

[0027] The other end of the eighth capacitor is electrically connected with the ground wire and the fourth pin of the first optocoupler.

[0028] Optionally, the pump further comprises a gear position indication module connected with the control module and configured to display gear position information under the control of the control module;

[0029] The control module is further configured to control the gear position indication module to display corresponding gear position information according to the current gear position of the pump.

[0030] Optionally, the gear position indication module comprises a plurality of indicator lights;

[0031] The control module is configured to control one or more of the indicator lights to emit light to indicate the current gear position of the pump according to the current gear position of the pump and a preset gear display rule.

[0032] Optionally, the pump further comprises an IPM (Intelligent Power Module) module and a motor electrically connected to the IPM module,

[0033] The IPM module is connected with the control module and configured to provide a driving voltage to the motor according to a speed control signal of the control module.

[0034] Optionally, the pump further comprises a power module configured to supply power to the pump.

[0035] Optionally, the control module is configured to control the pump according to the preset gear after the pump is started.

[0036] The external control signal transmitted by the external communication module is monitored.

[0037] As can be seen from the above, the technical scheme provided by the embodiments of the present application enables the pump to control the working mode of the pump through the control module, and to obtain the control mode switching operation of the user through the switching module, thereby ensuring the reliability of the control mode switching, so that the user can select different control modes, and the pump can meet the control requirements of the pump in different application scenarios. BRIEF DESCRIPTION OF DRAWINGS

[0038] Fig. 1 is a structural schematic diagram of a pump provided by an embodiment of the present application;

[0039] Fig. 2 is a circuit diagram of a control module provided by an embodiment of the present application;

[0040] Fig. 3 is a circuit diagram of a first key assembly provided by an embodiment of the present application;

[0041] Fig. 4 is a circuit diagram of an external communication module provided by an embodiment of the present application;

[0042] Fig. 5 is a circuit diagram of a second key assembly provided by an embodiment of the present application;

[0043] Fig. 6 is a structural schematic diagram of a pump provided by an embodiment of the present application;

[0044] Fig. 7 is a circuit diagram of a gear indication module provided by an embodiment of the present application. DETAILED DESCRIPTION

[0045] The technical scheme of the present application will be further described below by means of specific embodiments and the accompanying drawings. It can be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only parts related to the present application are shown in the drawings, but not all.

[0046] In the present application, some orientation words are defined. Unless otherwise stated, the orientation words such as "up", "down", "left", "right", "in", "out" are used for the convenience of understanding, and thus do not constitute a limitation on the scope of protection of the present application.

[0047] In the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can include that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature is "on", "above" and "over" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature is "under", "below" and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0048] In the description of the present application, unless specifically defined and limited otherwise, the terms "connected", "connected", "fixed" should be understood broadly, for example, can be fixedly connected, or can be detachably connected, or integrated; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0049] The embodiment of the present application provides a pump with multiple control modes, which can be applied to a heating device, for example, a boiler or a wall-mounted boiler, and multiple pumps can be arranged in a heating system in which the heating device is located, for example, pumps are arranged in different circuits of the heating system to pump fluid.

[0050] As shown in FIG. 1, the pump mainly includes an external communication module, a switching module and a control module.

[0051] The external communication module is connected with the control module and is configured to receive the external control signal sent by the external controller and transmit to the control module. The external communication module can also be configured to receive the feedback signal of the control module and transmit to the external controller.

[0052] The external controller can be a controller in the heating device, or a control module of another pump in the heating system. The external controller can send the external control signal to the pump in the form of PWM signal, Bluetooth, infrared signal and the like. The external communication module is a functional module that can receive the external control signal. The external communication module is in signal connection with the control module, and then the external control signal can be transmitted to the control module. The external control signal can indicate the working parameters such as the rotating speed and / or power of the pump.

[0053] The switching module is connected with the control module and is configured to obtain the control mode switching operation of the user and transmit the control mode switching signal to the control module.

[0054] The switching module can obtain the operation of the user, for example, the operation of the user on the switching module when the control mode of the pump needs to be switched. The operation of the user can be that the user directly contacts the switching module, for example, the switching module can be a key assembly and / or a switch assembly, the user can press or touch the key, and / or open and close the switch; the operation of the user can also be that the user sends a certain signal to the switching module, for example, the user sends a wireless signal such as an infrared light signal, a magnetic signal or a radio signal to the switching module through a signal-emitting device (for example, a remote controller); the operation of the user can also be a non-contact operation on the switching module, for example, the switching module can perceive vibration (for example, a vibration-perceiving sensor is arranged), and the operation of the user can be to emit a sound, and for another example, the switching module can detect objects within a certain distance range (for example, a proximity sensor is arranged), and the operation of the user can be to reach out to the switching module.

[0055] The control module is configured to determine whether the pump is controlled according to a preset gear in the control module or according to an external control signal according to whether the external control signal is received and whether the control mode switching signal is received.

[0056] The control module selects to control the pump according to the preset gear in the control module or according to the external control signal based on a preset control mode switching rule according to the received external control signal and the control mode switching signal, and specifically can control the rotating speed or power of the pump. For example, the pump is controlled by default according to the preset gear, if the control mode switching signal is received and the external control signal is received, the pump is controlled according to the external control signal; if the control mode switching signal is received but the external control signal is not received, the preset gear control is maintained; if the external control signal is received but the control mode switching signal is not received, the preset gear control is also maintained. The user performs the switching operation of the control mode through the switching module, and determines how the pump is controlled through the preset control mode switching rule in the control module. The pump has multiple control modes and can adapt to different application occasions, and the switching process of the control mode is also relatively reliable, avoiding the influence of misoperation on the operation of the pump. As shown in FIG. 2, the control module mainly includes a main control chip, which can receive and process related signals and control the operation of the pump through a built-in program.

[0057] Optionally, the pump further comprises an IPM module and a motor electrically connected to the IPM module.

[0058] The IPM module is connected to the control module and is configured to provide a driving voltage to the motor according to a rotating speed control signal of the control module. The IPM module can drive the motor to rotate and can provide overvoltage protection. The rotating speed of the pump is determined by the control module, and then the rotating speed of the motor is adjusted by the IPM module according to the rotating speed control signal of the control module.

[0059] Optionally, the pump further comprises a power module configured to supply power to the pump. Wherein, according to the power of the pump and the applicable occasion, the external alternating current power can be converted into the power required by the pump for operation. For example, the three-phase alternating current is converted into the direct current required by the control module, and at the same time, the power is supplied to the IPM module.

[0060] Optionally, the switching module comprises a first key assembly connected with the first gear switching input end of the control module.

[0061] The control module is configured to determine whether the external control signal is acquired if the first preset key signal of the first key assembly is received; if the external control signal is acquired, the pump is controlled to switch to the external control gear, and the pump speed is controlled according to the acquired external control signal.

[0062] Wherein, as shown in FIG. 3, the first key assembly comprises a first key KEY1 and a twenty-third resistor R23. The first end of the first key KEY1 is grounded, the second end of the first key KEY1 is connected with the first end of the twenty-third resistor R23, the second end of the twenty-third resistor R23 is connected with the direct current power supply; the second end of the first key KEY1 is connected with the corresponding input end of the control module, and the control module can acquire whether the first key is pressed. The first preset key signal can be a long-press key, that is, the key is pressed for a preset time length, or a continuous press key, that is, the interval time length between two times of pressing the key is less than a preset time interval. Taking the long-press key as an example, if the control module acquires that the first key KEY1 is pressed and continuously pressed for a preset time length, the control module considers that the first preset key signal of the first key assembly is received. If the first preset key signal is acquired, the control module can acquire the external control signal, and then switches to the external control gear, and the control module determines the speed of the pump by analyzing the external control signal. If the control module receives the first preset key signal of the first key assembly, but does not acquire the external control signal, the pump remains in the current preset gear.

[0063] Optionally, the pump further comprises a feedback module configured to feed back error information to the user and remind the user that the switching of the control mode is unsuccessful if the control module receives the first preset key signal of the first key assembly but does not acquire the external control signal. If it is a user misoperation or the switching operation is triggered by an external interference factor, the user can find the cause of the mis-triggering in time. The feedback module can feed back the error information by at least one of sound, vibration, light, displayed text and sending information to the user terminal device.

[0064] Optionally, the control module pre-stores a gear cycle sequence, and the control module is further configured to, if the third preset key signal of the first key assembly is received, compare the current gear of the pump with the pre-set gear cycle sequence, and switch the pump to the next gear of the current gear in the gear cycle sequence. The pump can be pre-set with multiple gears, such as constant speed gears, constant pressure gears, and proportional pressure gears. When multiple gears are pre-set in the pump, the gears can be selected by the first key assembly, and the third preset key signal can be a single key signal, i.e. the duration of pressing the key is less than the preset single key duration. The first preset key signal and the third preset key signal are different signals, so that the control mode switching and the built-in gear switching can be multiplexed on the first key assembly, and the control mode switching operation and the built-in gear switching operation can be distinguished by different key signals.

[0065] Optionally, as shown in FIG. 4, the external communication module includes a PWM receiving unit.

[0066] The PWM receiving unit includes a second optocoupler U7, a second resistor R39, a fifth resistor R42, a sixth resistor R38, a seventh resistor R40, an eighth resistor R44, a ninth capacitor C30, a tenth capacitor C29, an eleventh capacitor C31, a first triode Q2, and a second triode Q3.

[0067] One end of the sixth resistor R38 is connected to one end of the seventh resistor R40 and an input port of the interface unit CN3, and is electrically connected to a first end of the second optocoupler U7. The other end of the sixth resistor R38 is electrically connected to a collector of the first triode Q2 and a base of the second triode Q3. The other end of the seventh resistor R40 is electrically connected to a collector of the second triode Q3, one end of the second resistor R39, and a second end of the second optocoupler U7. The other end of the second resistor R39 is connected to an emitter of the second triode Q3.

[0068] The fifth resistor R42 is connected in parallel with the ninth capacitor C30. One end of the fifth resistor R42 is electrically connected to an emitter of the first triode Q2 and an analog ground wire. The other end of the fifth resistor R42 is electrically connected to a base of the first triode Q2 and an emitter of the second triode Q3.

[0069] The sixth end of the second optocoupler U7 is electrically connected to a power supply, one end of the tenth capacitor C29, and one end of the eighth resistor R44. The fifth end of the second optocoupler U7 is electrically connected to the other end of the tenth capacitor C29 and a ground wire. The fourth end of the second optocoupler U7 is electrically connected to the other end of the eighth resistor R44, one end of the eleventh capacitor C31, and a signal input end of the control module.

[0070] Optionally, the external communication module further includes a PWM sending unit.

[0071] The PWM sending unit comprises a third resistor R36, a fourth resistor R37, a seventh capacitor C25, an eighth capacitor C26 and a first optocoupler U6.

[0072] One end of the third resistor R36 is electrically connected with one end of the seventh capacitor C25 and an output port of the interface unit CN3, the other end of the third resistor R36 is electrically connected with a first pin of the first optocoupler U6, and the other end of the seventh capacitor C25 is electrically connected with a second pin of the first optocoupler U6 and an analog ground wire.

[0073] One end of the fourth resistor R37 is electrically connected with one end of the eighth capacitor C26 and a signal output end of the control module, and the other end of the fourth resistor R37 is electrically connected with a third pin of the first optocoupler U6.

[0074] The other end of the eighth capacitor C26 is electrically connected with a ground wire and a fourth pin of the first optocoupler U6.

[0075] Optionally, the switching module further comprises a switch assembly arranged in a signal transmission line between the external communication module and the control module; wherein the switch assembly can be arranged on an input port IN of the interface unit CN3 shown in FIG. 4, or can be arranged between the PWM receiving unit and a signal input end PWM IN of the control module. When the switch is closed, the external control signal can be transmitted to the control module, and when the switch is opened, the external control signal cannot be transmitted to the control module.

[0076] The control module is configured to determine whether the external control signal is acquired; if the external control signal is acquired, the pump is switched to the external control gear, and the pump speed is controlled according to the acquired external control signal.

[0077] In order to realize the switching of the control mode, the switch assembly controls the on-off of the transmission line of the external control signal, and the control module can detect whether the external control signal is acquired in real time or periodically. In the case that the external controller has transmitted the external control signal to the pump, if the user closes the switch assembly, the control module detects the external control signal, and can automatically trigger the switching of the control mode, switches the pump to the external control gear, and controls the pump speed according to the acquired external control signal; if the user opens the switch assembly, the control module cannot detect the external control signal, and the pump is controlled to remain in the built-in preset gear.

[0078] In addition, the switch assembly can be arranged on the basis of the first key assembly, so that in the case that the external controller has transmitted the external control signal to the pump, if the user closes the switch assembly and operates the first key assembly to send the first preset key signal, the pump is switched to the external control gear. In this way, the switch assembly serves as a control device of the pump control mode, and if the pump needs to switch the control mode during work, the switch assembly is closed; if the pump does not need to switch the control mode during work, the switch assembly is opened.

[0079] Optionally, the switching module further comprises a second key assembly connected with the second gear switching input end of the control module.

[0080] The control module is configured to, if the second preset key signal of the second key assembly is received, determine whether the external control signal is acquired; if the external control signal is acquired, control the pump to switch to the external control gear, and control the pump speed according to the acquired external control signal.

[0081] As shown in FIG. 5, the second key assembly comprises a second key KEY2 and an eleventh resistor R11; the first end of the second key KEY2 is grounded, the second end of the second key KEY2 is connected with the first end of the eleventh resistor R11, and the second end of the eleventh resistor R11 is connected with the direct current power supply; the second end of the second key KEY2 is connected with the corresponding input end of the control module, and the control module can acquire whether the second key is pressed. A plurality of gears can be preset in the pump for user selection. When a plurality of selectable gears are preset in the pump, the gears can be selected through the first key assembly, and the control mode can be switched through the second key assembly. Since the built-in gear switching and control mode switching adopt different keys, the second preset key signal can be one of single key pressing, long key pressing and continuous key pressing. The control module controls the pump to switch to the external control gear when the second preset key signal of the second key assembly is received and the external control signal is acquired.

[0082] Optionally, as shown in FIG. 6, the pump further comprises a gear indication module connected with the control module and configured to display gear information under the control of the control module. The control module is further configured to control the gear indication module to display the corresponding gear information according to the current gear of the pump.

[0083] Optionally, the gear indication module comprises a plurality of indicator lights; the control module is configured to control one or more of the indicator lights to emit light to indicate the current gear of the pump according to the current gear of the pump and a preset gear display rule.

[0084] As shown in FIG. 7, the gear indication module includes a first LED lamp D8, a second LED lamp D9, a third LED lamp D10, a fourth LED lamp D11, and a fifth LED lamp D12, and further includes a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, and an eighteenth resistor R18. The LED lamps and the resistors are connected in series one by one in the above order. The anode of the LED lamp is connected to a direct current power supply, and the cathode is connected to a corresponding control pin of the control module. The preset gears of the pump built-in can include constant speed gears, constant pressure gears, and proportional pressure gears, plus external control gears. If one LED lamp is used for each gear, more LED lamps need to be set on the pump panel. Gear display rules can be set. Some gears use a single LED lamp to indicate, and some gears use multiple LED lamps to indicate. For example, the preset gears include constant speed gear I, constant speed gear II, constant speed gear III, constant pressure gear I, constant pressure gear II, constant pressure gear III, proportional pressure gear I, proportional pressure gear II, proportional pressure gear III, and self-learning gear, plus external control gears, totaling 11 gears. In the case of five LED lamps in turn being the first LED lamp D8, the second LED lamp D9, the third LED lamp D10, the fourth LED lamp D11, and the fifth LED lamp D12, the constant speed gear I, the constant speed gear II, the constant speed gear III, the self-learning gear, and the external control gear correspond to the first LED lamp D8, the second LED lamp D9, the third LED lamp D10, the fourth LED lamp D11, and the fifth LED lamp D12 one by one, and a single LED lamp is used to indicate; the constant pressure gear I, the constant pressure gear II, the constant pressure gear III, the proportional pressure gear I, the proportional pressure gear II, and the proportional pressure gear III use two LED lamps to indicate, such as the constant pressure gear I lighting the first LED lamp D8 and the second LED lamp D9, the constant pressure gear II lighting the first LED lamp D8 and the third LED lamp D10, the constant pressure gear III lighting the first LED lamp D8 and the fourth LED lamp D11, the proportional pressure gear I lighting the second LED lamp D9 and the third LED lamp D10, the proportional pressure gear II lighting the second LED lamp D9 and the fourth LED lamp D11, and the proportional pressure gear III lighting the second LED lamp D9 and the fifth LED lamp D12.

[0085] Optionally, the control module is configured to control the pump to work according to the preset gear after the pump is started; and monitor whether an external control signal transmitted by the external communication module is received.

[0086] In the pump, after being powered on, a key control mode is executed by default, and a preset gear is selected through a first key assembly; a control module monitors whether there is an external control signal input in real time; according to the hardware setting of the pump, the control logic of the control module is configured (for example, if the first key assembly is set, when it is detected that there is an external control signal input and the first key is long-pressed, the pump is switched to an external control gear; if a switch assembly is set, when it is detected that there is an external control signal input, the pump is switched to the external control gear; if the first key assembly and the second key assembly are set, when it is detected that there is an external control signal input and the second key is long-pressed, the pump is switched to the external control gear); if the condition of switching to the external control gear is not met, the pump always executes the key control mode.

[0087] Although the present application has been described in detail with general description, specific embodiments and experiments, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, all belong to the scope of the present application claimed.

Claims

1. A pump with multiple control modes, comprising: External communication module, switching module, and control module. The external communication module is connected to the control module and is configured to receive external control signals sent by the external controller and transmit them to the control module; The switching module is connected to the control module and is configured to acquire the user's control mode switching operation and transmit the control mode switching signal to the control module. The control module is configured to determine whether to control the pump to operate according to a preset gear in the control module or according to the external control signal, depending on whether the external control signal and the control mode switching signal are received.

2. The pump according to claim 1, wherein, The switching module includes a first button component, which is connected to the first gear switching input terminal of the control module; The control module is configured to, if it receives a first preset button signal from the first button component, determine whether an external control signal has been obtained; if an external control signal has been obtained, control the pump to switch to the external control mode, and control the pump speed according to the obtained external control signal.

3. The pump according to claim 2, wherein, The switching module also includes a switch component, which is disposed in the signal transmission line between the external communication module and the control module; The control module is configured to determine whether an external control signal is obtained; if an external control signal is obtained, the control pump is switched to the external control mode, and the pump speed is controlled according to the obtained external control signal.

4. The pump according to claim 2, wherein, The switching module also includes a second button component, which is connected to the second gear switching input terminal of the control module; The control module is configured to, if it receives a second preset button signal from the second button component, determine whether an external control signal has been obtained; if an external control signal has been obtained, control the pump to switch to the external control mode and control the pump speed according to the obtained external control signal.

5. The pump according to claim 1, wherein, The external communication module includes: The PWM receiving unit includes a second optocoupler, a second resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth capacitor, a tenth capacitor, an eleventh capacitor, a first transistor, and a second transistor. One end of the sixth resistor and one end of the seventh resistor are connected to the input port of the interface unit and electrically connected to the first end of the second optocoupler. The other end of the sixth resistor is electrically connected to the collector of the first transistor and the base of the second transistor. The other end of the seventh resistor is electrically connected to the collector of the second transistor, one end of the second resistor and the second end of the second optocoupler. The other end of the second resistor is connected to the emitter of the second transistor. The fifth resistor is electrically connected in parallel with the ninth capacitor, wherein one end of the fifth resistor is electrically connected to the emitter of the first transistor and the analog ground, and the other end of the fifth resistor is electrically connected to the base of the first transistor and the emitter of the second transistor. The sixth terminal of the second optocoupler is electrically connected to the power supply, one end of the tenth capacitor, and one end of the eighth resistor. The fifth terminal of the second optocoupler is electrically connected to the other end of the tenth capacitor and the ground wire. The fourth terminal of the second optocoupler is electrically connected to the other end of the eighth resistor, one end of the eleventh capacitor, and the signal input terminal of the control module.

6. The pump according to any one of claims 1-5, wherein, The pump also includes a gear indicator module, which is connected to the control module and configured to display gear information under the control of the control module; The control module is also configured to control the gear indicator module to display the corresponding gear information according to the pump's current gear position.

7. The pump according to claim 6, wherein, The gear position indicator module includes multiple indicator lights; The control module is configured to control one or more of the indicator lights to illuminate to indicate the current pump gear according to the pump's current gear and preset gear display rules.

8. The pump according to any one of claims 1-5, wherein, The pump also includes an IPM module and a motor electrically connected to the IPM module. The IPM module is connected to the control module and is configured to provide drive voltage to the motor according to the speed control signal of the control module.

9. The pump according to claim 8, wherein, The pump also includes a power module configured to supply power to the pump.

10. The pump according to any one of claims 1-5, wherein, The control module is configured as follows: After the pump is started, the pump operation is controlled according to the preset gear. Monitor whether the external control signal transmitted by the external communication module is received.

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