Pump components and home appliances

Abstract

This application discloses a pump assembly and a household appliance. The pump assembly includes a pump housing and a permanent magnet synchronous motor. The pump housing has a pump chamber. The permanent magnet synchronous motor includes a rotor assembly, a stator assembly, a Hall sensor, and a control board. The rotor assembly partially extends into the pump chamber. The stator assembly is disposed around the rotor assembly and is used to drive the rotor assembly to rotate. The Hall sensor is disposed around the rotor assembly and is used to output a detection signal corresponding to the operating state of the rotor assembly. The control board is electrically connected to the Hall sensor and the stator assembly, and the control board is used at least to control the rotor assembly to start based on the detection signal and through the stator assembly. This embodiment can reduce abnormal noise generated when the pump assembly starts.

Description

Technical Field

[0001] This application relates to the field of household equipment technology, and in particular to a pump assembly and household appliance. Background Technology

[0002] The function of the washing machine pump assembly is to quickly drain the wastewater from the drum after washing or rinsing. Existing products generally use permanent magnet synchronous pumps or DC brushless pumps. Among them, permanent magnet synchronous pumps are the mainstream due to their low cost and simple structure. In related technologies, the rotor assembly is housed in the rotor cavity within the motor housing. The rotor cavity also serves as a "starting cavity," containing intermediate components and shock-absorbing rubber. During startup, a fixed phase sequence current is first applied to the stator windings to generate a pulsating magnetic field. The rotor permanent magnets, under the influence of the magnetic field, oscillate back and forth within the starting cavity. The intermediate components repeatedly impact the shock-absorbing rubber, and the rubber's rebound gradually accelerates the rotor until it reaches synchronous speed.

[0003] Therefore, the permanent magnet synchronous pump assembly of the washing machine relies on the repeated mechanical impact of the intermediate component and the shock-absorbing rubber in the starting chamber to generate the initial torque, which causes abnormal noise during startup. Utility Model Content

[0004] This application provides a pump assembly and a household appliance that can reduce abnormal noise generated when the pump assembly starts up.

[0005] In a first aspect, embodiments of this application provide a pump assembly, the pump assembly including a pump housing and a permanent magnet synchronous motor, the pump housing having a pump chamber, and the permanent magnet synchronous motor including: The rotor assembly extends partially into the pump chamber; A stator assembly is disposed around the rotor assembly and is used to drive the rotor assembly to rotate; A Hall sensor, disposed around the rotor assembly, is used to output a detection signal corresponding to the operating state of the rotor assembly; and A control board, electrically connected to the Hall sensor and the stator assembly, is used at least to control the rotor assembly to start based on the detection signal and via the stator assembly.

[0006] In one embodiment, the permanent magnet synchronous motor further includes: Motor housing, connected to the pump housing; The rotor assembly, the stator assembly, and the Hall sensor are all mounted on the motor housing, and the control board is mounted on the motor housing or the stator assembly.

[0007] In one embodiment, the rotor assembly includes: The rotating shaft is at least partially disposed within the motor housing; and An impeller is fixedly connected to the rotating shaft and extends into the pump chamber; The Hall sensor is used to detect the rotation of the shaft or the impeller to obtain information related to the working state of the impeller in the pump chamber.

[0008] In one embodiment, the rotor assembly further includes a permanent magnet sleeved on the rotating shaft; the motor housing includes: The rotor housing is connected to the pump housing and has a rotor cavity. The permanent magnet is disposed in the rotor cavity, and the shaft portion extends out of the rotor cavity and is connected to the impeller. The Hall sensor is mounted on the rotor housing.

[0009] In one embodiment, the Hall sensor is embedded inside the rotor housing; or The Hall sensor is disposed on the outer surface of the rotor housing; or The inner surface of the rotor housing is recessed with a groove, and the Hall sensor is installed in the groove.

[0010] In one embodiment, a plurality of Hall sensors are arranged at circumferential intervals along the rotor housing.

[0011] In one embodiment, the motor housing includes: The stator housing is connected to the pump housing and surrounds the outer periphery of the rotor housing, and together with the rotor housing, defines the stator cavity; The stator assembly and the control board are disposed within the stator cavity.

[0012] In one embodiment, the stator assembly includes: A stator frame is disposed within the stator cavity; The stator core is inserted through the stator frame and surrounds the rotor housing; and Stator windings are wound on the stator frame; The control board is mounted on the stator frame.

[0013] In one embodiment, the control board is disposed on the side of the stator frame opposite to the impeller and surrounds the rotor housing, and the Hall sensor is disposed on the outer surface of the rotor housing and plugged into the control board.

[0014] In one embodiment, the stator assembly further includes: A thermal protector is disposed on the stator frame and adjacent to the stator winding, and the thermal protector is also electrically connected to the control board.

[0015] In one embodiment, the impeller includes: The impeller shaft is coaxially connected to the rotating shaft; and Multiple blades are arranged circumferentially on the impeller shaft, and the blades are flat blades or arc-shaped plate blades.

[0016] In one embodiment, the control board also controls the rotor assembly to stop, reverse, or rotate in a predetermined direction when starting, based on the detection signal.

[0017] In one embodiment, when the gas content in the pump chamber is greater than a preset content, the control board controls the rotor assembly to stop rotating.

[0018] In one embodiment, when the rotor assembly stalls, the control board controls the rotor assembly to reverse.

[0019] In one embodiment, if the pump assembly fails to start, the control board controls the pump assembly to stop for a preset time before restarting.

[0020] In one embodiment, the rotor assembly does not have a starting chamber.

[0021] In one embodiment, the Hall sensor is plugged into the control board to achieve an electrical connection; or The pump assembly also includes wires, through which the Hall sensor is electrically connected to the control board.

[0022] Secondly, embodiments of this application provide a household appliance, which includes: Pump assembly as described in any of the preceding items; The main body of the equipment includes a main control board, which is electrically connected to the control board.

[0023] In one embodiment, it further includes: A high-voltage power supply line electrically connects the main control board and the stator assembly, and the main control board supplies power to the stator assembly through the high-voltage power supply line; and A low-voltage power supply line is electrically connected to the main control board and the control board, and the main control board supplies power to the control board through the low-voltage power supply line; or, a voltage converter is disposed on the control board and electrically connected to the high-voltage power supply line, used to step down the voltage provided by the high-voltage power supply line and then supply power to the control board.

[0024] In one embodiment, it further includes: The control board communicates bidirectionally with the main control board via the communication line, or the control board communicates unidirectionally with the main control board via the communication line to forward the detection signal to the main control board.

[0025] Based on the above embodiments, the pump assembly proposed in this application can be used in home appliances, such as clothing processing equipment. It can use Hall sensors to sense the magnetic field of the rotor assembly in real time, digitize the position and status information of the rotor assembly, and then the control board can make precise decisions and operations based on this information.

[0026] During startup, pump assemblies in related technologies rely on mechanical impact within the startup chamber to generate initial torque, leading to abnormal noise. In this embodiment, however, when the pump assembly starts, a Hall sensor located around the rotor assembly detects the polarity of the magnetic field generated by the rotor assembly—for example, whether the N pole or S pole faces the Hall sensor. The Hall sensor converts this physical signal, representing the initial magnetic field state of the rotor assembly, into an electrical signal and transmits it to the control board in real time. The control board, acting as a "decision unit," receives this electrical signal, effectively obtaining the magnetic pole position information of the rotor assembly. Subsequently, the control board supplies current to the stator assembly, causing it to generate an electromagnetic field "precisely aligned" with the initial magnetic field of the rotor assembly. For example, when the Hall signal indicates that the N pole of the rotor assembly is aligned with a certain position on the stator assembly, the control board immediately controls a portion of the stator assembly to generate an S pole. Utilizing the principle that the magnetic field direction of the stator assembly is opposite to that of the rotor assembly, driving torque is generated directly and smoothly, causing the rotor assembly to begin rotating and gradually and smoothly accelerating to the target speed. It can avoid torque jitter and shock caused by initial phase uncertainty, and achieve smooth start without mechanical impact and torque jitter, and significantly reduce start-up noise and vibration. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the structure of a pump assembly according to an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a rotor assembly according to an embodiment of this application; Figure 3 for Figure 1 A schematic diagram of the exploded structure shown; Figure 4 for Figure 2 The diagram shows the exploded structure.

[0029] Explanation of icon numbers: 100. Pump assembly; 10. Pump casing; 10a. Pump chamber; 20. Permanent magnet synchronous motor; 21. Rotor assembly; 211. Shaft; 212. Impeller; 2121. Impeller shaft; 2122. Blade; 213. Permanent magnet; 214. First bearing; 215. Second bearing; 216. Rubber plug; 217. Bearing cover; 218. Gasket; 22. Stator assembly; 221. Stator frame; 222. Stator core; 223. Stator winding; 23. Hall sensor; 24. Control board; 25. Motor housing; 251. Rotor housing; 252. Stator housing; 252a. Stator chamber; 30. Sewage pipe; 200. Low-voltage power supply line.

[0030] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0032] Where the following description relates to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0033] In the description of this application, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Furthermore, in the description of this application, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0035] In modern home appliances, pump assemblies are widely used as key functional components in scenarios requiring fluid transport, circulation, or discharge. For example, in laundry equipment, washing machines use pump assemblies to drain wastewater from the inner drum after washing; in kitchen appliances, dishwashers use pump assemblies to spray and clean dishes and drain water.

[0036] Among the many household appliances that utilize pump components, laundry equipment, especially washing machines, requires a certain level of quietness during the drainage process. Currently, washing machine pump components on the market generally use permanent magnet synchronous motors or DC brushless motors. In these technologies, when the pump component starts, the initial position of the rotor component cannot be known in advance, resulting in uncertainty in the interaction force between the rotating magnetic field generated by the stator component after energization and the rotor's permanent magnet. This uncertainty often causes the rotor to experience brief, irregular shaking or reverse rotation at the moment of startup, leading to mechanical impact with other structural components within the pump casing (such as shock-absorbing pads and supports), resulting in significant startup noise and vibration.

[0037] like Figure 1 As shown, to solve the above problems, this embodiment provides a household appliance (not shown). The appliance includes a main body, namely a washing machine body, and a pump assembly 100 for performing a drainage function. The pump assembly 100 can be integrated inside the washing machine body. The washing machine body has a clothes processing chamber for accommodating clothes to be processed. The clothes processing chamber is cylindrical. During washing, rinsing, or spin-drying, the clothes and water are tumbled and agitated in this chamber. To complete the drainage process, a drain outlet is provided on the bottom or side wall of the clothes processing chamber. This drain outlet is connected to the water inlet of the pump assembly 100 through one or more hollow drain pipes, thereby forming a fluid channel extending from the clothes processing chamber to the pump assembly 100. The pump assembly 100 can be located at a certain position on the drain pipe. Its function is to draw the wastewater in the clothes processing chamber up through the drain pipe, pressurize it, and pump it out to the outside of the washing machine body.

[0038] like Figure 1 , Figure 2 and Figure 3As shown, the pump assembly 100 includes a pump housing 10 and a permanent magnet synchronous motor 20. The pump housing 10 has a pump chamber 10a, at least one inlet, and an outlet. The liquid to be drained from the garment processing chamber can be drawn into the pump chamber 10a through the inlet, while the pressurized liquid is discharged through the outlet. The permanent magnet synchronous motor 20 includes a rotor assembly 21, a stator assembly 22, and a control board 24. Part of the rotor assembly 21 extends into the pump chamber 10a. The stator assembly 22 is disposed on the periphery of the rotor assembly 21 and is electrically connected to the control board 24. The stator assembly 22 can generate a rotating magnetic field through the current signal input from the control board 24. The rotating magnetic field generated by the stator assembly 22 interacts with the permanent magnet magnetic field of the rotor assembly 21 to form a torque that drives the rotor assembly 21 to rotate. That is, the stator assembly 22 is used to drive the rotor assembly 21 to rotate.

[0039] To reduce abnormal noise generated during the startup of the pump assembly 100, the permanent magnet synchronous motor 20 also includes a Hall sensor 23. The Hall sensor 23 is disposed on the periphery of the rotor assembly 21 and electrically connected to the control board 24. It is used to output a detection signal corresponding to the operating state of the rotor assembly 21. That is, the Hall sensor 23 can sense the magnetic field polarity and position information of the rotor assembly 21 in real time, convert it into an electrical signal, and transmit it to the control board 24. The control board 24 is used at least to calculate the phase and amplitude of the current that should be applied to each phase winding of the stator assembly 22 based on the detection signal, so that the stator assembly 22 generates a rotating magnetic field that is precisely aligned with the rotor magnetic field, and controls the rotor assembly 21 to start through the stator assembly 22, using the interaction force of the magnetic fields to smoothly drive the rotor assembly 21 to start rotating from a stationary state.

[0040] Specifically, in this embodiment, when the pump assembly 100 starts, the Hall sensor 23 disposed around the rotor assembly 21 can detect the polarity of the magnetic field generated by the rotor assembly 21, for example, whether the N pole or the S pole is facing the Hall sensor 23. The Hall sensor 23 converts this physical signal, representing the initial magnetic field state of the rotor assembly 21, into an electrical signal and transmits it to the control board 24 in real time. The control board 24, as a "decision unit," receives this electrical signal, which is equivalent to obtaining the magnetic pole position information of the rotor assembly 21. Subsequently, the control board 24 controls the clothing processing equipment to supply current to the stator assembly 22, so that it generates an electromagnetic field that is "precisely aligned" with the initial magnetic field of the rotor assembly 21. For example, when the Hall signal indicates that the N pole of the rotor assembly 21 is aligned with a certain position of the stator assembly 22, the control board 24 immediately controls a portion of the stator assembly 22 to generate the S pole. Utilizing the principle that the magnetic field direction of the stator assembly 22 is opposite to that of the rotor assembly 21, thus generating driving torque, the control board 24 directly and smoothly pulls the rotor assembly 21 to begin rotating, gradually and smoothly accelerating it to the target speed. This avoids torque jitter and impact caused by initial phase uncertainty, achieving a smooth start without mechanical impact or torque jitter, and significantly reducing starting noise and vibration.

[0041] The main body of the equipment also includes a main control board (not shown in the figure). The main control board can be the central control unit of the home appliance, responsible for the logic control, user interaction, and equipment status management of the whole machine. The main control board is electrically connected to the control board 24. In the home appliance, the pump assembly 100 is part of its subsystem. The pump assembly 100 can be integrated with other systems (such as the washing system of a washing machine). The main control board can receive feedback information from multiple subsystems, make comprehensive judgments and decisions based on this information, and realize the collaborative work of multiple subsystems.

[0042] The main control board can be electrically connected to the user interface (such as a display screen), and can receive user input commands and provide feedback to the user on the working status and fault information of the pump assembly 100. The user can control the start and stop, speed adjustment and rotation direction switching of the pump assembly 100 through the operation buttons, which enhances the user's control and management capabilities of the pump assembly 100 at different stages of the washing program.

[0043] In this embodiment, by configuring the electrical connection between the control board 24 and the main control board, the control board 24 is at least used to receive control commands from the main control board, and control the stator assembly 22 to drive the rotor assembly 21 to work according to the control commands and / or detection signals, so that the pump assembly 100 can receive and execute more complex commands from the main body of the equipment.

[0044] The pump assembly can operate in three modes, including but not limited to: First, operating solely based on control commands: The main control board determines to start drainage based on the washing program. Upon receiving this command, the control board 24 controls the stator assembly 22 to drive the rotor assembly 21 to rotate. During this process, the detection signal from the Hall sensor 23 is primarily used for basic drive, and the control board's execution mainly relies on the main control board's commands. Second, operating solely based on detection signals: When the pump assembly is draining normally, if the frequency of the detection signal from the Hall sensor 23 suddenly becomes abnormal, the control board 24 can autonomously determine that the pump assembly is idling and immediately control the stator assembly 22 to stop driving the rotor assembly 21, thereby achieving protection and reducing noise. Third, operating simultaneously based on both control commands and detection signals: The main control board issues a specific target speed command. After receiving this command, the control board 24 uses it as the control target. Simultaneously, it continuously reads the detection signal from the Hall sensor 23 to obtain the current actual speed and continuously adjusts the drive output to stabilize the actual speed at the target speed command.

[0045] The control board 24 is electrically connected to the main control board, enabling signal communication between them. This means the control board 24 can feed back its operating status to the main control board, which then issues commands based on this status. Conversely, the main control board can also transmit signals to the control board 24 to control the pump assembly. This electrical connection allows for more coordinated control of the garment processing equipment. In some implementations, if the pump assembly malfunctions during drainage, the control board 24 sends a command to the main control board, instructing it not to perform drainage during the malfunction period, thus preventing drainage from worsening the drainage process.

[0046] Of course, the electrical connection between the control board 24 and the main control board is not limited to the above-mentioned method; there are other methods as well. For example, when the user selects the "silent wash" mode, the main control board can send relevant instructions to the control board 24 to make it adopt a lower maximum speed and a smoother acceleration rate, thereby translating the user's silent requirement into specific execution parameters for the pump assembly 100. Alternatively, when the door of the garment processing equipment is accidentally opened, the main control board can immediately send an emergency stop instruction to the pump assembly 100 and other modules. This allows the pump assembly 100 to participate in emergency shutdown, greatly improving the safety of the garment processing equipment. Or, in the "anti-soaking" program of the garment processing equipment, it is necessary to drain the water briefly and then refill it after soaking the clothes for a period of time, repeating this process. Based on the washing program logic and timer it is running, the main control board issues corresponding timing instructions to the control board 24.

[0047] The main control board can also coordinate with the pump assembly 100 to control based on information from other modules. For example, it can calculate the drainage time based on the weight of the clothes. If the pump assembly 100 fails to complete the drainage within the expected time, the main control board can determine that a minor blockage or abnormality may have occurred. It can then proactively send commands to inquire about the status or take other measures, making the operation of the clothing processing equipment program more predictable and reliable.

[0048] Furthermore, the main control board can also record the weight and actual drainage time of each drainage operation over a long period of time. If it finds that the required drainage time for similar clothing weights is gradually increasing, the main control board can infer that the performance of the pump assembly 100 may have declined. If the pump assembly 100 is blocked by foreign objects, the main control board can actively send a command for "high-intensity drainage mode" or "forward and reverse flushing mode" in the next drainage to attempt self-cleaning. It can also send a maintenance reminder to the display screen that "it is recommended to clean the pump assembly 100".

[0049] In other words, the main control board can dynamically adjust the operating parameters of the pump assembly 100 based on the working status of other modules in the equipment. For example, it can adjust the speed of the pump assembly 100 according to different stages of the washing program, or optimize the power output according to load changes. At the same time, the pump assembly 100 control board 24 also feeds back the rotor position and operating status data collected by the Hall sensor 23 to the main control board in real time, enabling the main control board to have a comprehensive understanding of the working status of the pump assembly 100. This two-way interaction enables collaborative work between the various systems of the garment processing equipment.

[0050] In addition, during the operation of the pump assembly 100, the control board 24 also sends signals to the main control board to inform the main control board of its operating status and prevent drainage abnormalities. For example, if the pump assembly 100 malfunctions and cannot drain water, and the main control board continues to perform drainage operations without receiving a signal, it will cause drainage abnormalities and errors in the entire garment processing equipment. Therefore, the signals of the control board 24 and the main control board are interconnected.

[0051] In some implementations, the rotor assembly 21 does not have a starting chamber. In related technologies, the starting chamber is used to house structures that assist in starting the rotor assembly 21, such as a metal cam, eccentric wheel, or pawl. However, in this embodiment, by introducing a Hall sensor 23 and a control board 24, the magnetic pole position of the rotor assembly 21 is detected, and this information is fed back to the control board 24. Based on the feedback information from the Hall sensor 23, the control board 24 calculates the initial position of the rotor assembly 21. Based on the initial position of the rotor assembly 21, the control board 24 generates a rotating magnetic field through the stator assembly 22 that is precisely aligned with the magnetic field of the rotor assembly 21. This avoids the use of mechanical impact to start the rotor assembly 21, thus eliminating the need for a starting chamber. This makes the overall structure more compact, saves internal space, and facilitates the miniaturization design of the pump assembly 100.

[0052] In some embodiments, the control board 24 can adjust the operating state of the rotor assembly 21 in real time according to the detection signal of the Hall sensor 23. That is, the control board 24 is also configured to control the rotor assembly 21 to stop, reverse, or rotate in a predetermined direction when starting, based on the detection signal. This flexibility allows the motor to respond quickly according to actual needs, improving the overall system operating efficiency. Furthermore, by controlling the operating state of the rotor assembly 21 through the detection signal, it can stop or reverse in time under abnormal conditions (such as overload, stall, or excessive temperature), avoiding damage to the pump assembly 100 or safety accidents. This protection mechanism is particularly suitable for scenarios with high safety requirements.

[0053] In some embodiments, when the gas content in the pump chamber 10a exceeds a preset level, the control board 24 controls the rotor assembly 21 to stop rotating according to the corresponding detection signal. It should be noted that the stopping can be done immediately after the signal is detected, or it can be done after a predetermined period of time. In one application scenario, for example, a household appliance is a clothing processing device. During the drainage stage, the water level in the clothing processing chamber has dropped to the drain outlet, and the pump assembly 100 will begin to draw in air and water. As the water level decreases, the gas ratio in the pump chamber 10a gradually increases. If operation continues at this time, the rotor assembly 21 will be in an "idling" or "dry running" state. Continuing to run the pump assembly 100 will waste electrical energy and have no actual drainage effect. The control board 24 can stop the pump assembly 100 according to the detection signal, which can optimize energy consumption and improve the overall energy efficiency of the clothing processing device.

[0054] When pump assembly 100 fails to start, control board 24 controls pump assembly 100 to stop for a preset time before restarting. This design effectively addresses temporary faults and improves the reliability and lifespan of pump assembly 100. In practical applications, when the garment processing equipment is in the drainage stage, if pump assembly 100 fails to start normally due to foreign object blockage, voltage fluctuations, or instantaneous overload, control board 24 will immediately stop driving and wait for a preset time (e.g., 5-10 seconds) before attempting to start again. This intermittent start strategy avoids motor overheating and component damage caused by continuous power supply, while providing an opportunity for self-recovery from temporary faults. For example, when pump assembly 100 is temporarily blocked by clothing fibers or small particles, after a period of inactivity, these debris may dislodge due to gravity or water flow impact, allowing pump assembly 100 to resume normal operation the next time it starts. Furthermore, this control method reduces unnecessary fault alarms, improves user experience, avoids interruptions to the washing program due to occasional faults, and ensures a more stable and reliable drainage function for the garment processing equipment.

[0055] The control board 24 includes a microcontroller, which is a highly integrated microcomputer system. As an embedded control core, it has the characteristics of small size, low power consumption, high integration and flexible programming. The microcontroller receives signals from detection elements such as Hall sensor 23, water level sensor, and pressure switch in real time through preset program logic, and judges the current operating status based on these signals, thereby realizing precise control of the operation mode of pump assembly 100.

[0056] In some embodiments, the permanent magnet synchronous motor 20 further includes a motor housing 25, which is an external protective structure of the permanent magnet synchronous motor 20. It may be made of a metal material (such as aluminum alloy or cast iron) and has good thermal conductivity, so that the permanent magnet synchronous motor 20 can dissipate heat to the outside through the motor housing 25 and prevent the permanent magnet synchronous motor 20 from being damaged due to overheating.

[0057] The motor housing 25 is also connected to the pump housing 10, specifically through a bolted connection. The bolts provide strong tightening force, ensuring a tight fit between the two and reducing vibration and noise during pump assembly 100 operation. The bolted connection also facilitates disassembly, making maintenance and replacement of the pump assembly 100 easier.

[0058] The rotor assembly 21, stator assembly 22, and Hall sensor 23 are all mounted on the motor housing 25. The motor housing 25 provides physical protection for key components such as the rotor assembly 21, stator assembly 22, and Hall sensor 23, preventing dust, moisture, foreign objects, etc. from entering the motor and thus avoiding component damage or performance degradation. It also provides support for the rotor assembly 21, stator assembly 22, and Hall sensor 23, preventing displacement or damage due to external forces.

[0059] The control board 24 is mounted on the motor housing 25 or the stator assembly 22, which can reduce the relative movement between the control board 24 and the internal components of the permanent magnet synchronous motor 20, thereby reducing the risk of signal interference caused by external impact and improving operational stability and reliability.

[0060] If the control board 24 is installed on the motor housing 25, it is easy to maintain and replace. If the control board 24 is installed on the stator assembly 22, the signal transmission path is short and the anti-interference ability is strong, which is suitable for application scenarios with high control accuracy requirements.

[0061] Please continue reading. Figure 1 , Figure 2 and Figure 3The rotor assembly 21 includes a shaft 211 and an impeller 212 fixedly connected to the shaft 211 and extending into the pump chamber 10a. At least a portion of the shaft 211 is disposed within the motor housing 25. The shaft 211 can be made of steel, possessing high mechanical strength and toughness, capable of withstanding various loads and stresses generated during the operation of the permanent magnet synchronous motor 20. Under the action of the rotating magnetic field of the stator assembly 22, the rotor assembly 21 rotates as a whole, and the rotation is transmitted to the impeller 212 through the shaft 211, thereby driving the impeller 212 to rotate together. The impeller 212 and the shaft 211 are rigidly fixedly connected, ensuring that no relative slippage or loosening occurs between them during startup, shutdown, and high-speed rotation, thus guaranteeing the reliability and efficiency of power transmission. Specifically, the impeller 212 can be connected to the end of the rotating shaft 211 by a threaded connection. The impeller 212 can act on the water in the pump chamber 10a. When rotating at high speed, the liquid is driven by the impeller 212. Under the action of centrifugal force, the liquid is thrown from the center of the impeller 212 to the outer edge of the impeller 212. In this process, it is accelerated, which also causes the liquid in the central area of ​​the impeller 212 to be removed, forming a negative pressure zone. The sewage to be discharged from the outside can be sucked into the pump chamber 10a. After the sucked liquid enters the center of the impeller 212, it is once again thrown to the outer edge of the impeller 212 by centrifugal force, completing the drainage process.

[0062] It should be noted that when the rotor assembly 21 is stalled, even if the permanent magnet synchronous motor 20 continues to output power, the rotor assembly 21 cannot rotate, which will cause the current to increase sharply, easily leading to overheating or even burnout of the permanent magnet synchronous motor 20. The control board 24 controls the rotor assembly 21 to reverse according to the detection signal corresponding to the Hall sensor 23, breaking the stall state, reducing the damage to the circuit caused by the continuously high current, and thus extending the life of the permanent magnet synchronous motor 20.

[0063] In clothing processing equipment such as washing machines, the impeller 212 of the pump assembly 100 is easily entangled or clogged by clothing fibers, hair, and other debris during operation. These debris gradually become entangled on the surface of the impeller 212 or get stuck in the gap between the impeller 212 and the pump housing 10, increasing the rotational resistance of the impeller 212 and even causing it to become completely jammed. Once the impeller 212 is jammed, it not only affects drainage efficiency but may also cause overload and overheating of the permanent magnet synchronous motor 20, and even damage to the control circuit or the motor itself. When the control board 24 receives a detection signal indicating abnormal rotation of the rotor assembly 21, it controls the rotor assembly 21 to reverse. This change in direction effectively peels off or loosens the fibers and hair entangled on the impeller 212, reducing the frictional resistance between the impeller 212 and the pump housing 10, thus achieving self-recovery. This reduces the need for users to manually clean the impeller 212, improving ease of use.

[0064] like Figure 2 and Figure 4As shown, in some embodiments, the impeller 212 includes an impeller shaft 2121 and multiple blades 2122. The impeller shaft 2121 is coaxially connected to the rotating shaft 211. The impeller shaft 2121 may be provided with internal threads, while the rotating shaft 211 is provided with external threads. The impeller shaft 2121 is sleeved and threaded onto the rotating shaft 211, forming a rigid fixation, which can effectively transmit torque and withstand large axial and radial loads. The multiple blades 2122 are arranged circumferentially on the impeller shaft 2121, which helps to improve the dynamic balance performance of the impeller 212, reduce vibration and noise during operation, thereby improving the smoothness of operation and service life of the permanent magnet synchronous motor 20.

[0065] Among them, the blade 2122 is either a flat plate blade 2122 or an arc-shaped plate blade 2122. The flat plate blade 2122 has a regular shape, and its processing and manufacturing process is relatively simple, making it suitable for mass production and with low cost. The arc-shaped plate blade 2122 can optimize the fluid flow path and guide the water flow direction. That is, the water flow is pushed by the arc-shaped plate blade 2122 and accelerated along the arc path, and finally flows out of the pump casing 10 in a tangential direction. This improves the kinetic energy conversion efficiency of the fluid, thereby improving the water pumping efficiency of the pump assembly 100, while reducing the noise of the pump assembly 100 pumping water in a partially water and partially air state within the pump chamber 10a.

[0066] It should be noted that when the blade 2122 is a flat plate blade 2122, because the blade 2122 has a symmetrical structure and no specific directionality, the impeller 212 can rotate in a non-directional manner. This design helps to reduce the entanglement of foreign objects such as fibers and hair on the impeller 212 during forward and reverse rotation, thereby improving the adaptability and reliability of the equipment under complex working conditions. However, when the blade 2122 is an arc-shaped plate blade 2122, because it has a specific bending direction and fluid guiding characteristics, the impeller 212 must rotate in a predetermined direction to ensure that the water flow is effectively guided along the curved surface of the blade 2122 and flows out of the pump casing 10 in a tangential direction, thereby achieving efficient water output and low-noise operation.

[0067] In practical applications, the control board 24 can output and analyze the detection signal from the Hall sensor 23 in waveform form. Different waveforms correspond to different operating states: for example, when the impeller 212 is stuck, that is, when the permanent magnet synchronous motor 20 is still outputting but the rotor assembly 21 cannot rotate, the Hall sensor 23 cannot detect the change in magnetic field. At this time, the output waveform is a straight line, indicating that the rotor assembly 21 is in a stationary state. Under normal rotation, the Hall sensor 23 will output periodic square waves or pulse waveforms as the magnetic poles of the rotor assembly 21 alternate. The frequency of the waveform is proportional to the rotational speed, and the time interval between the waveforms can reflect the real-time rotational speed of the rotor assembly 21. When the rotor assembly 21 starts or accelerates, the waveform frequency gradually increases and the waveform interval gradually shortens, reflecting the increase in the rotational speed of the rotor assembly 21. When the rotor assembly 21 decelerates or stops, the waveform frequency gradually decreases and the waveform interval gradually lengthens until it disappears. When the rotor assembly 21 reverses, the phase of the waveform output by the Hall sensor 23 will change, and the waveform sequence will be opposite to that of forward rotation, thus being identified by the control board 24 as a reverse state. When the rotor assembly 21 experiences a negative rotation, the phase of the waveform output by the Hall sensor 23 will change, and the waveform sequence will be opposite to that of forward rotation, thus being identified by the control board 24 as a reverse state. When the load fluctuates or there is a slight stall, the waveform may show irregular jitter or missing pulses, reflecting the unstable state of the rotor rotation. When the rotor assembly 21 is running under low load or no load, the waveform frequency is high and stable, and the waveform edges are clear, indicating that the rotor is running smoothly and the resistance is small. When the rotor assembly 21 is running under heavy load or high resistance, the waveform frequency decreases and may be deformed, reflecting the operating state of the rotor assembly 21 when overcoming a large load. Through these different waveform characteristics, the control board 24 can judge the operating state of the rotor assembly 21 in real time and take corresponding control strategies according to the waveform changes, such as stop protection, reverse reversal to get out of trouble, speed regulation, etc., thereby realizing intelligent control of the pump assembly 100.

[0068] To achieve electrical connection between Hall sensor 23 and control board 24, in some implementations, Hall sensor 23 is plugged into control board 24, that is, through plug-in components, such as electrical connectors, terminals, etc., to achieve electrical connection. The plug-in design facilitates the installation and replacement of Hall sensor 23. When Hall sensor 23 fails, it can be replaced by plugging and unplugging without disassembling complex circuits, reducing maintenance difficulty and time cost.

[0069] In another embodiment, the pump assembly 100 also includes wires, through which the Hall sensor 23 is electrically connected to the control board 24. The wire connection allows for a more flexible positional relationship between the Hall sensor 23 and the control board 24, which is suitable for complex structures or space-constrained scenarios. The Hall sensor 23 can be installed at a location far from the control board 24 and connected via wire extensions to adapt to different design requirements.

[0070] In other implementations, the Hall sensor 23 can also be electrically connected to the control board 24 via wireless communication technology, supporting remote data transmission and allowing for flexible position settings.

[0071] In some embodiments, the home appliance also includes a high-voltage power supply line, the main function of which is to transmit high-voltage, high-current electrical energy. The high-voltage power supply line is electrically connected to the main control board and the stator assembly 22. The main control board supplies power to the stator assembly 22 through the high-voltage power supply line, enabling the stator assembly 22 to generate a sufficient magnetic field to drive the rotor assembly 21 to rotate. The main control board can also cut off the power supply to the stator assembly 22 according to the overall operating strategy of the home appliance.

[0072] It should be noted that the main control board controls whether the stator assembly 22 is energized via the high-voltage power supply line. When the stator assembly 22 is energized, the control board 24 controls the energization logic of the stator assembly 22 based on Hall information and instructions, thereby driving the rotor assembly 21 to operate. In other words, the main control board is similar to a master switch. The control board 24 can also immediately cut off the power supply of the high-voltage power supply line and protect the pump assembly 100 based on abnormal information and feedback to the main control board.

[0073] The power supply for control board 24 can be achieved through one of the following two settings: In one embodiment, the home appliance also includes a low-voltage power supply line 200, which provides a stable low-voltage power supply. The low-voltage power supply line 200 electrically connects the main control board and the control board 24. The main control board supplies power to the control board 24 through the low-voltage power supply line 200. The low-voltage power supply line 200 is mainly used for signal transmission or control commands. It is not easily affected by strong current interference, which can ensure the integrity and stability of the control signal during transmission, reduce the risk of damage to the control board 24 due to high voltage, and improve the safety of the home appliance.

[0074] Furthermore, separating high-voltage and low-voltage wiring helps to standardize and regulate circuit design, making it easier for later maintenance and repair.

[0075] In another embodiment, the appliance also includes a voltage converter that converts high voltage to low voltage. The voltage converter is mounted on the control board 24 and electrically connected to the high-voltage power supply line, used to step down the voltage supplied by the high-voltage power supply line to power the control board 24. The voltage converter provides overvoltage and overcurrent protection to ensure the safe operation of the control board 24 under high-voltage power supply, and allows the control board 24 to directly draw power from the high-voltage line without the need for additional low-voltage power supply lines 200, saving wiring space. This is suitable for compact appliances or appliances with limited wiring space.

[0076] In some embodiments, the home appliance also includes a communication line, through which the control board 24 communicates bidirectionally with the main control board. The bidirectional communication allows the main control board to obtain the status information detected by the control board 24. At the same time, the main control board can also send control commands to the control board 24, enabling the home appliance to dynamically adjust its operating parameters and improve the response speed and control accuracy of the pump assembly 100.

[0077] Alternatively, control board 24 can communicate unidirectionally with the main control board via a communication line to forward detection signals to the main control board. In other words, the main control board does not send commands back to control board 24, eliminating the need for complex bidirectional communication protocols and interface circuits. Unidirectional communication reduces the complexity of data interaction and the possibility of communication conflicts and interference, making it suitable for applications with high stability requirements but relatively simple control logic.

[0078] Furthermore, since the main control board does not need to send instructions to the control board 24, the control board 24 can be in a low-power state and only send signals when needed, thereby reducing the overall power consumption and making it suitable for energy-saving home appliances.

[0079] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the rotor assembly 21 further includes a permanent magnet 213 sleeved on the rotating shaft 211. The permanent magnet 213, through its inherent magnetism, can provide a stable and continuous magnetic field, which interacts with the magnetic field generated by the stator assembly 22, thereby driving the rotor assembly 21 to rotate.

[0080] In some embodiments, the rotor assembly 21 further includes a shim 218, a bearing cover 217, a rubber plug 216, a first bearing 214, and a second bearing 215. The first bearing 214 and the second bearing 215 are coaxially arranged with the permanent magnet 213 and are all sleeved on the rotating shaft 211. The first bearing 214 is located on the side of the permanent magnet 213 closer to the impeller 212, and the second bearing 215 is located on the side of the permanent magnet 213 away from the first bearing 214. The rotating shaft 211 can be supported on the pump casing 10 by the first bearing 214 and the second bearing 215, ensuring that the rotating shaft 211 rotates stably as the centerline of the rotor assembly 21 and withstands the radial and axial forces generated by the impeller 212 during high-speed rotation. The shim 218 is disposed between the first bearing 214 and the permanent magnet 213 and can be used to adjust the axial clearance so that the permanent magnet 213 and the first bearing 214 maintain an appropriate distance and avoid direct contact that would cause wear. At the same time, the shim 218 also plays a role in buffering and shock absorption.

[0081] The rubber plug 216 and the bearing cover 217 are also coaxially arranged with the permanent magnet 213, and the rubber plug 216 and the bearing cover 217 are arranged adjacent to each other. The rubber plug 216 is located on the side of the first bearing 214 away from the gasket 218. The rubber plug 216 mainly plays the role of sealing and shock absorption. The rubber plug 216 and the bearing cover 217 together form a sealing structure, which can effectively prevent external impurities (such as dust and moisture) from entering the interior of the first bearing 214. The bearing cover 217 can be used to fix and protect the first bearing 214 and the rubber plug 216, preventing them from loosening due to external force or vibration.

[0082] like Figure 3 As shown, in some embodiments, the motor housing 25 includes a rotor housing 251, which may be cylindrical. The central axis of the rotor housing 251 is coaxially arranged with the central axis of the rotating shaft 211. The rotor housing 251 is connected to the pump housing 10 and has a rotor cavity. The rotor cavity extends through one side facing the pump housing 10. The part of the rotor assembly 21 with the second bearing 215 is disposed in the rotor cavity, and the permanent magnet 213 is disposed in the rotor cavity. The rotating shaft 211 extends out of the rotor cavity and is connected to the impeller 212. The Hall sensor 23 is disposed on the rotor housing 251. The Hall sensor 23 is located radially to the permanent magnet 213 and is disposed close to the permanent magnet 213, which can more accurately sense changes in the magnetic field, thereby improving the response speed.

[0083] Furthermore, in some embodiments, multiple Hall sensors 23 are arranged at circumferential intervals along the rotor housing 251, specifically at uniform intervals. Multiple Hall sensors 23 can cover a wider detection range, provide more comprehensive position information, improve the position detection accuracy of the rotor assembly 21, and reduce positioning errors during startup. Moreover, when one Hall sensor 23 fails, the other Hall sensors 23 can still work normally, thereby ensuring the stability of drainage in the household appliance.

[0084] For example, three Hall sensors 23 may be provided, with the three Hall sensors 23 evenly spaced, that is, adjacent ones are arranged at a distance of 120°, so as to realize all-round detection of rotor assembly 21.

[0085] In some implementations, the Hall sensor 23 can be embedded inside the rotor housing 251 to prevent external environmental corrosion and improve its service life in harsh environments; or, the Hall sensor 23 can be disposed on the outer surface of the rotor housing 251 for easy installation, debugging and replacement, suitable for application scenarios where the Hall sensor 23 can be replaced; or, the inner surface of the rotor housing 251 is recessed with a groove, and the Hall sensor 23 is installed in the groove, so that the rotor housing 251 provides a certain degree of protection for the Hall sensor 23, makes full use of the internal space of the rotor housing 251, avoids occupying extra volume, and the groove can limit the Hall sensor 23 to prevent it from being displaced during operation.

[0086] like Figure 3 As shown, in some embodiments, the Hall sensor 23 is disposed on the outer surface of the rotor housing 251, and the rotor housing 251 also includes limiting ribs disposed on both sides of the Hall sensor 23 to limit the position of the Hall sensor 23 and prevent it from shifting on the rotor housing 251.

[0087] Please continue reading. Figure 3 In some embodiments, the motor housing 25 further includes a stator housing 252, which is generally square in shape and surrounds the outer periphery of the rotor housing 251 and is connected to the pump housing 10. The stator housing 252 and the rotor housing 251 together define a stator cavity 252a, in which the stator assembly 22 and the control board 24 are both disposed within the stator cavity 252a, making the internal structure of the permanent magnet synchronous motor 20 highly integrated, saving space and contributing to the miniaturization of the pump assembly 100.

[0088] As a metal shell, the stator housing 252 can effectively shield external electromagnetic interference and prevent the stator assembly 22 and control board 24 from affecting external equipment when they are working. By also placing the control board 24 inside the stator cavity 252a, the signal transmission path can be further shortened and the risk of signal interference can be reduced.

[0089] The stator cavity 252a is filled with sealant, encapsulating the stator assembly 22 and control board 24. The sealant filling process thoroughly fills all gaps within the stator cavity 252a, forming a barrier. This prevents moisture, corrosive gases (such as detergent volatiles), and dust from corroding the stator assembly 22 and the precision electronic components on the control board. After sealant filling, all components within the stator cavity 252a are cured into a single unit, effectively resisting the vibrations and impacts generated by the water pump operation.

[0090] Furthermore, the sealant can be a thermally conductive adhesive, which can conduct the heat generated by the stator assembly 22 and the control board 24 during operation to the entire stator housing 252, and then utilize the metal surface area of ​​the motor housing for efficient heat dissipation, thus avoiding heat accumulation.

[0091] Specifically, the stator assembly 22 includes a stator frame 221, a stator core 222, and a stator winding 223, all disposed within the stator cavity 252a. The stator frame 221 can be made of a high-strength material, providing a stable mounting base for the stator core 222 and the stator winding 223, ensuring they maintain the correct position and shape during operation of the permanent magnet synchronous motor 20. The stator frame 221 has winding slots to allow the stator winding 223 to be wound on it, facilitating the orderly arrangement of the stator winding 223. The stator core 222 can be composed of stacked silicon steel sheets, which are inserted through the stator frame 221 and surround the rotor housing 251. The stator core 222 is used to guide and concentrate the magnetic field. When the stator winding 223 is energized, it generates a rotating magnetic field, which interacts with the permanent magnet 213 of the rotor assembly 21, thereby driving the rotor assembly 21 to rotate. The stator winding 223 can ensure the efficient transmission of magnetic lines of force in the permanent magnet synchronous motor 20.

[0092] The stator core 222 has a first arc-shaped groove in the exposed part of the stator core 222. The first arc-shaped groove is arranged through the thickness direction of the stator core 222. The stator core 222 can be semi-enclosed on the outer periphery of the rotor housing 251 through the first arc-shaped groove, so that the stator core 222 can be arranged closer to the permanent magnet 213, shortening the magnetic circuit path between the stator core 222 and the permanent magnet 213, reducing magnetic resistance, and helping to improve the response speed of magnetic pole control.

[0093] Furthermore, the control plate 24 is located on the side of the stator frame 221 away from the impeller 212, at least partially within the stator cavity 252a, and surrounds the rotor housing 251. Specifically, the control plate 24 has a second arc-shaped groove that is opposite to the first arc-shaped groove. The control plate 24 is semi-enclosed by the second arc-shaped groove on the outer periphery of the rotor housing 251 to achieve a compact arrangement of the internal structure of the permanent magnet synchronous motor 20.

[0094] The Hall sensor 23 is located on the outer surface of the rotor housing 251 and is plugged into the control board 24, which shortens the signal transmission path and reduces the possibility of signal attenuation and external electromagnetic interference.

[0095] like Figure 3As shown in the diagram, in some embodiments, the stator assembly 22 further includes a thermal protector, which is a protective device for preventing overheating of the permanent magnet synchronous motor 20. The thermal protector is disposed on the stator winding 223 and adjacent to the control board 24. The thermal protector can be fixed to the stator winding 223 by screws, clips, or adhesives to ensure close contact with the stator winding 223 for monitoring temperature changes of the stator winding 223. The thermal protector is also electrically connected to the control board 24. That is, when the thermal protector detects abnormal temperature or current in the stator winding 223, it can send a signal to the control board 24 to switch the circuit in time, trigger the protection action, prevent the stator winding 223 from burning out due to overheating or overcurrent, and avoid damage to the permanent magnet synchronous motor 20 due to malfunction.

[0096] like Figure 1 As shown, in some embodiments, the pump assembly 100 further includes a sewage pipe 30 and a control valve. The sewage pipe 30 is connected to the pump housing 10 and communicates with the pump chamber 10a. The control valve is used to open and close the communication between the sewage pipe 30 and the pump chamber 10a. The main function of the sewage pipe 30 is to provide an emergency discharge channel when the pump assembly 100 is blocked or damaged, so as to discharge the sewage accumulated in the pump chamber 10a in a timely manner.

[0097] Specifically, when the pump assembly 100 fails to operate normally due to blockage by foreign objects, impeller 212 jamming, or motor failure, the sewage in the pump chamber 10a cannot be discharged through the normal outlet. At this time, by opening the sewage pipe 30, the sewage in the pump chamber 10a can be guided to the external drainage system or temporary collection device, thereby effectively reducing the internal pressure of the pump chamber 10a and reducing the corrosion or damage of sewage to the internal components of the pump assembly 100.

[0098] Furthermore, the presence of the sewage pipe 30 facilitates routine maintenance and repair. For example, before repairing or replacing components of the pump assembly 100, residual liquid in the pump chamber 10a can be drained through the sewage pipe 30, improving operational safety and maintenance efficiency.

[0099] The pump assembly 100 also includes a filter assembly disposed within the pump chamber 10a. The filter assembly is located at the inlet and removes or intercepts impurities and particles in the water flowing into the pump assembly 100 to protect the pump assembly 100 from wear and clogging, ensuring that the pump assembly 100 can operate efficiently and smoothly. Specifically, the filter assembly can remove suspended solids and particulate matter from the water and reduce turbidity, thereby protecting the pump assembly 100.

[0100] The above is an explanation of the pump assembly 100 proposed in the embodiments of this application. Since the household appliance proposed in the embodiments of this application adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be repeated here.

[0101] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0102] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A pump assembly characterized by, The pump assembly includes a pump housing and a permanent magnet synchronous motor. The pump housing has a pump chamber, and the permanent magnet synchronous motor includes: The rotor assembly extends partially into the pump chamber; A stator assembly is disposed around the rotor assembly and is used to drive the rotor assembly to rotate; A Hall sensor, disposed around the rotor assembly, is used to output a detection signal corresponding to the operating state of the rotor assembly; and A control board, electrically connected to the Hall sensor and the stator assembly, is used at least to control the rotor assembly to start based on the detection signal and via the stator assembly.

2. The pump assembly of claim 1, wherein, The permanent magnet synchronous motor also includes: Motor housing, connected to the pump housing; The rotor assembly, the stator assembly, and the Hall sensor are all mounted on the motor housing, and the control board is mounted on the motor housing or the stator assembly.

3. The pump assembly of claim 2, wherein, The rotor assembly includes: The rotating shaft is at least partially disposed within the motor housing; and An impeller is fixedly connected to the rotating shaft and extends into the pump chamber; The Hall sensor is used to detect the rotation of the shaft or the impeller to obtain information related to the working state of the impeller in the pump chamber.

4. The pump assembly of claim 3, wherein, The rotor assembly further includes a permanent magnet sleeved on the rotating shaft; the motor housing includes: The rotor housing is connected to the pump housing and has a rotor cavity. The permanent magnet is disposed in the rotor cavity, and the shaft portion extends out of the rotor cavity and is connected to the impeller. The Hall sensor is mounted on the rotor housing.

5. The pump assembly as claimed in claim 4, characterized in that, The Hall sensor is embedded inside the rotor housing; or The Hall sensor is disposed on the outer surface of the rotor housing; or The inner surface of the rotor housing is recessed with a groove, and the Hall sensor is installed in the groove.

6. The pump assembly of claim 4, wherein, Multiple Hall sensors are arranged at circumferential intervals along the rotor housing.

7. The pump assembly of claim 4, wherein, The motor housing includes: The stator housing is connected to the pump housing and surrounds the outer periphery of the rotor housing, and together with the rotor housing, defines the stator cavity; The stator assembly and the control board are disposed within the stator cavity.

8. The pump assembly of claim 7, wherein, The stator assembly includes: A stator frame is disposed within the stator cavity; The stator core is inserted through the stator frame and surrounds the rotor housing; and Stator windings are wound on the stator frame; The control board is mounted on the stator frame.

9. The pump assembly of claim 8, wherein, The control board is located on the side of the stator frame away from the impeller and surrounds the rotor housing. The Hall sensor is located on the outer surface of the rotor housing and is plugged into the control board.

10. The pump assembly of claim 8, wherein, The stator assembly further includes: A thermal protector is disposed on the stator winding and adjacent to the control board, and the thermal protector is also electrically connected to the control board.

11. The pump assembly of any one of claims 3-10, wherein, The impeller includes: The impeller shaft is coaxially connected to the rotating shaft; and Multiple blades are arranged circumferentially on the impeller shaft, and the blades are flat blades or arc-shaped plate blades.

12. The pump assembly of claim 1, wherein, The control board also controls the rotor assembly to stop, reverse, or rotate in a predetermined direction when starting, based on the detection signal.

13. The pump assembly of claim 12, wherein, When the gas content in the pump chamber is greater than a preset content, the control board controls the rotor assembly to stop rotating.

14. The pump assembly of claim 12, wherein, When the rotor assembly is stalled, the control board controls the rotor assembly to reverse.

15. The pump assembly of claim 12, wherein, If the pump assembly fails to start, the control board controls the pump assembly to stop for a preset time before restarting.

16. The pump assembly of any one of claims 1-10, 12-15, wherein, The rotor assembly does not have a starting chamber.

17. The pump assembly according to any one of claims 1-10, 12-15, characterized in that, The Hall sensor is plugged into the control board to achieve an electrical connection; or The pump assembly also includes wires, through which the Hall sensor is electrically connected to the control board.

18. An electric home appliance characterized by comprising: include: The pump assembly as described in any one of claims 1-17; The main body of the equipment includes a main control board, which is electrically connected to the control board.

19. The home appliance of claim 18, wherein, Also includes: A high-voltage power supply line electrically connects the main control board and the stator assembly, and the main control board supplies power to the stator assembly through the high-voltage power supply line; as well as A low-voltage power supply line is electrically connected to the main control board and the control board, and the main control board supplies power to the control board through the low-voltage power supply line; or, a voltage converter is disposed on the control board and electrically connected to the high-voltage power supply line, used to step down the voltage provided by the high-voltage power supply line and then supply power to the control board.

20. The appliance of any of claims 18-19, wherein, Also includes: The control board communicates bidirectionally with the main control board via the communication line, or the control board communicates unidirectionally with the main control board via the communication line to forward the detection signal to the main control board.

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