Control method and device for preventing water pump from being stuck

Abstract

The invention provides a control method and device for preventing a water pump from being stuck, a once-through pump is installed on a heating pipeline, and the method comprises the steps that whether the once-through pump meets the preset reverse triggering requirement or not is judged; if the once-through pump meets the preset reverse triggering requirement, the once-through pump is controlled to rotate reversely; and after the direct current pump rotates reversely for a preset time period, the direct current pump is controlled to rotate forwards. According to the control method for preventing the water pump from being stuck, the problem that the water pump is stuck can be automatically solved, and the processing efficiency and convenience are improved.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a control method and device for preventing a pump from getting stuck. Background Art

[0002] Gas heating water boilers usually use AC pumps to circulate water in the heating system. However, during use, the inside of the AC pump is easily stuck by small debris or bacteria, causing the AC pump to fail to operate normally, thereby affecting the normal operation of the heating system.

[0003] Since the AC pump has only one rotation direction, when the AC pump is stuck by debris and cannot operate, it can only be solved by manual operation. The specific method is to use a flat screwdriver to turn the screws on the pump body to turn the shaft to make it operate, but manual operation is time-consuming and laborious. If the jamming problem is not solved in time, it will seriously affect the normal operation of the entire heating system and bring inconvenience to users. Summary of the invention

[0004] The present application provides a control method and device for preventing a waterproof pump from getting stuck, so as to solve the technical problem of time-consuming and labor-intensive manual operation.

[0005] In a first aspect, the present application provides a control method for preventing a water pump from getting stuck, wherein a DC pump is installed on a heating pipe, and the method comprises:

[0006] Determining whether the DC pump meets a preset reverse triggering requirement;

[0007] If the DC pump meets the preset reverse trigger requirement, controlling the DC pump to rotate in the reverse direction;

[0008] After the DC pump rotates in the reverse direction for a preset period of time, the DC pump is controlled to rotate in the forward direction.

[0009] A further technical solution is that the step of judging whether the DC pump meets a preset reversal trigger requirement comprises:

[0010] Determining whether the DC pump has received a preset start instruction;

[0011] If the DC pump receives a preset start instruction, it is determined that the DC pump meets a preset reverse trigger requirement.

[0012] A further technical solution is that the determining whether the DC pump meets the preset reversal triggering requirement further includes:

[0013] Determining whether the DC pump has received a preset stop operation instruction;

[0014] If the DC pump receives a preset stop operation instruction, it is determined that the DC pump meets a preset reverse trigger requirement.

[0015] A further technical solution is that the DC pump comprises a rotor, a stator and a circuit board, wherein the stator and the circuit board are sealed and potted in the DC pump, and the rotor and the stator are spaced apart;

[0016] The controlling the DC pump to rotate in reverse includes:

[0017] The circuit board is used to change the direction of the magnetic field generated by the coil of the stator through electronic commutation to control the reverse rotation of the rotor.

[0018] A further technical solution is that both the rotor and the stator are provided with multi-level magnetic fields;

[0019] When the rotor rotates relative to the stator by a preset angle, the magnetic pole direction of the rotor is automatically changed so that the rotors maintain same-level repulsion.

[0020] A further technical solution is that the rotor comprises an impeller and an annular magnet connected to each other, and the impeller is located in the heating pipe;

[0021] The method of using the circuit board to change the direction of the magnetic field generated by the coil of the stator through electronic commutation to control the reverse rotation of the rotor includes:

[0022] The circuit board is used to change the direction of the magnetic field generated by the coil of the stator through electronic commutation, so as to control the reverse rotation of the annular magnet, thereby driving the impeller to rotate in the reverse direction.

[0023] In a second aspect, the present application provides a control device for preventing a pump from getting stuck, the control device comprising a DC pump and a controller, the controller being used to execute any of the above methods;

[0024] The DC pump comprises:

[0025] Pump body;

[0026] The rotor comprises an annular magnet, an impeller and a sleeve, wherein the annular magnet is connected to the impeller, and the impeller is arranged in the heating pipe and has an opening;

[0027] Stator; the stator is encapsulated in the pump body, and the stator includes a shell, a rotating shaft, and a coil; the shell is provided with a receiving cavity, the rotating shaft is arranged in the middle of the receiving cavity, one end of the rotating shaft is fixed to the shell, and the other end is partially penetrated in the opening along the height direction of the opening, the shaft sleeve is arranged between the rotating shaft and the end surface of the opening, and a rotation gap is formed between the rotating shaft and the shaft sleeve;

[0028] The annular magnet is located in the accommodating cavity, and the coil is arranged on the outer circumference of the accommodating cavity and around the rotating shaft;

[0029] A circuit board is encapsulated in the pump body and electrically connected to the controller.

[0030] A further technical solution is that the DC pump is also provided with an isolation structure, and the isolation structure is provided between the annular magnet and the coil.

[0031] A further technical solution is that the annular magnet and the impeller are an integrated structure.

[0032] A further technical solution is that the stator and the circuit board are potted in the DC pump using epoxy resin glue.

[0033] The beneficial effect of the present application is: different from the prior art, the present application adopts a DC pump installed on the heating pipe. Since the DC pump can realize rotation in two directions by changing the direction of current, the present application can judge whether the DC pump meets the preset reversal trigger requirement; if the DC pump meets the preset reversal trigger requirement, the DC pump is controlled to rotate in reverse, and after the DC pump rotates in reverse for a preset time period, the DC pump is controlled to rotate forward. In this way, the DC pump can be used to reversely rotate to remove fine debris or oversized bacterial clusters deposited inside the DC pump, and then the DC pump can be controlled to rotate forward to work normally. That is, the present application can automatically control the DC pump to rotate in reverse to remove impurities inside the DC pump after judging that the DC pump meets the preset reversal trigger requirement, without manual operation, which helps to improve processing efficiency and convenience, and thus can solve the problem of water pump jamming in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. Among them:

[0035] Figure 1 A schematic diagram of the structure of the DC pump provided in this application installed on a wall-mounted boiler;

[0036] Figure 2 A schematic diagram of the internal structure of a DC pump according to an embodiment of the present application;

[0037] Figure 3 A schematic diagram of the rotor structure of an embodiment of a DC pump provided in the present application;

[0038] Figure 4A schematic diagram of the stator structure of an embodiment of a DC pump provided in the present application;

[0039] Figure 5 A flow chart of an embodiment of a control method for preventing a waterproof pump from getting stuck provided in the present application.

[0040] Description of Figure Numbers:

[0041] DC pump 100 , rotor 120 , annular magnet 121 , impeller 122 , opening 1221 , sleeve 123 , stator 130 , housing 131 , accommodating cavity 1311 , rotating shaft 132 , coil 133 , circuit board 140 , isolation structure 150 , heating pipe 300 , wall-mounted boiler 400 . DETAILED DESCRIPTION

[0042] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0043] The disclosure below provides many different embodiments or examples to implement different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0044] Gas heating water boilers usually use AC pumps to circulate water in the heating system. However, during use, the inside of the AC pump is easily stuck by small debris or bacteria, causing the AC pump to fail to operate normally, thereby affecting the normal operation of the heating system.

[0045] Since the AC pump has only one rotation direction, when the AC pump is stuck by debris and cannot operate, it can only be solved by manual operation. The specific method is to use a flat screwdriver to turn the screws on the pump body to turn the shaft to make it operate, but manual operation is time-consuming and laborious. If the jamming problem is not solved in time, it will seriously affect the normal operation of the entire heating system and bring inconvenience to users.

[0046] Therefore, in order to solve the time-consuming and labor-intensive technical problem caused by manual operation, the present application provides a control method and device for preventing the water pump from getting stuck, which can improve processing efficiency and convenience, and thus solve the problem of water pump getting stuck in time. Please refer to the following embodiments for details.

[0047] See also Figure 1-Figure 4 The present application provides a control device for preventing a water pump from getting stuck, the control device comprising a DC pump 100 and a controller, and the controller is used to execute the method steps for preventing a water pump from getting stuck in the following embodiments.

[0048] The DC pump 100 includes a pump body, a rotor 120 , a stator 130 and a circuit board 140 .

[0049] The rotor 120 includes an annular magnet 121 , an impeller 122 and a sleeve 123 . The annular magnet 121 is connected to the impeller 122 . The impeller 122 is disposed in the heating pipe 300 and is provided with an opening 1221 .

[0050] The stator 130 is encapsulated in the pump body, and the stator 130 includes a housing 131, a rotating shaft 132, and a coil 133; the housing 131 is provided with a housing cavity 1311, the rotating shaft 132 is arranged in the middle of the housing cavity 1311, one end of the rotating shaft 132 is fixed to the housing 131, and the other end is partially penetrated in the opening 1221 along the height direction of the opening 1221, the shaft sleeve 123 is arranged between the rotating shaft 132 and the end surface of the opening 1221, and a rotation gap is formed between the rotating shaft 132 and the shaft sleeve 123;

[0051] The annular magnet 121 is located in the accommodating cavity 1311 , and the coil 133 is disposed on the outer circumference of the accommodating cavity 1311 and around the rotating shaft 132 ;

[0052] The circuit board 140 is encapsulated in the pump body and electrically connected to the controller.

[0053] The working principle of the control device for preventing the water pump from getting stuck is as follows: the coil 133 on the stator 130 generates a magnetic field after being energized to drive the annular magnet 121 to work and provide torque to the DC pump 100.

[0054] The annular magnet 121 is magnetized at n levels (n is an even number) so that the parts of the annular magnet 121 form a complete coupled magnetic system. When the magnetic poles generated by the coil 13310 inside the stator 130 are opposite to the magnetic poles of the annular magnet 1218, that is, the displacement angle between the two magnetic poles is 0, the magnetic energy of the magnetic system is the lowest; when the magnetic poles rotate to be opposite to the same poles, that is, the displacement angle between the two magnetic poles is 2π / n, the magnetic energy of the magnetic system is the highest. When the external force is removed, due to the mutual repulsion of the magnetic poles of the magnetic system, the magnetic force will restore the annular magnet 121 to the state with the lowest magnetic energy. Therefore, the annular magnet 121 moves, driving the rotor 120 to rotate.

[0055] Since there is a rotation gap between the rotating shaft 132 and the sleeve 123, and the rotation gap (including the outer wall of the rotating shaft 132 or the inner wall of the sleeve 123) is prone to accumulate small debris or overly large bacterial clumps, therefore, by adopting a DC pump 100 installed on the heating pipe 300, taking advantage of the DC pump 100 that can achieve rotation in two directions by changing the direction of current, by changing the direction of the magnetic field of the annular magnet 121, the impeller 122 is driven to change the rotation direction, and then the impurities in the gap between the rotating shaft 132 and the sleeve 123 can be cleaned up, which helps to prevent the gap between the rotating shaft 132 and the sleeve 123 from being stuck due to clogging by debris, resulting in the problem that the DC pump 100 cannot operate.

[0056] In some embodiments, the DC pump 100 is further provided with an isolation structure 150 , and the isolation structure 150 is provided between the annular magnet 121 and the coil 133 .

[0057] The isolation structure 150 may be made of a rust-proof material, such as EPDM rubber.

[0058] Since an isolation structure 150 is provided between the annular magnet 121 and the coil 133, a complete sealing effect can be achieved between the annular magnet 121 and the coil 133 without providing a traditional mechanical shaft seal, thereby effectively preventing water from intruding into the coil 133 area, ensuring that the coil 133 is not corroded by moisture, reducing the risk of short circuits in electrical components such as the coil 133, and thus improving the safety of the control device.

[0059] In some embodiments, the annular magnet 121 and the impeller 122 are an integral structure.

[0060] The annular magnet 121 and the impeller 122 can be injection molded into an integral structure, so that the synchronous movement between the annular magnet 121 and the impeller 122 can be ensured; in addition, the annular magnet 121 and the impeller 122 are combined into a whole through the injection molding process, which also helps to improve the stability and reliability of the rotor 120 structure.

[0061] In some implementations, the stator 130 and the circuit board 140 are potted in the DC pump 100 using epoxy resin glue.

[0062] The sealing layer formed by the epoxy resin glue can effectively block dust and impurities from entering, protecting the internal components of the DC pump 100 from pollution. In addition, the epoxy resin glue has good corrosion resistance, which can prevent metal parts from rusting and corroding, and extend the service life of the DC pump 100 device.

[0063] In addition, the epoxy resin glue has a high hardness after curing, which can increase the stability of the stator 130 and the circuit board 140, reduce the impact of vibration and impact on the internal components of the DC pump 100, and the internal components are not easily damaged when impacted by external forces.

[0064] In some embodiments, the rotor 120 and the stator 130 are both provided with a multi-level magnetic field. When the rotor 120 rotates relative to the stator 130 by a preset angle, the magnetic pole direction of the rotor 120 is automatically changed, so that the rotor 120 maintains same-level repulsion, thereby enabling the DC pump 100 to have a higher speed and efficiency.

[0065] Among them, the preset angle can be 60 degrees, 120 degrees, etc.

[0066] Based on the above embodiments, the present application also provides a control method for preventing a pump from getting stuck. Figure 5 , Figure 5 This is a flow chart of a first embodiment of a control method for a waterproof pump stuck provided by the present application, the method comprising:

[0067] Step 110: Determine whether the DC pump meets a preset reverse trigger requirement.

[0068] Among them, the DC pump is installed on the heating pipe. When the DC pump is working, it can drive the water in the heating pipe to flow.

[0069] Step 120: If the DC pump meets the preset reverse trigger requirement, control the DC pump to rotate in the reverse direction.

[0070] Step 130: After the DC pump rotates in the reverse direction for a preset period of time, the DC pump is controlled to rotate in the forward direction.

[0071] Among them, the preset time period can be selected and set according to actual conditions, and this application does not limit it here.

[0072] This embodiment uses a DC pump installed on the heating pipe. Since the DC pump can realize rotation in two directions by changing the direction of current, the present application can determine whether the DC pump meets the preset reversal trigger requirement; if the DC pump meets the preset reversal trigger requirement, the DC pump is controlled to rotate in reverse, and after the DC pump rotates in reverse for a preset time period, the DC pump is controlled to rotate forward. In this way, the DC pump can be used to reversely rotate to remove fine debris or oversized bacterial clusters deposited inside the DC pump, and then the DC pump can be controlled to rotate forward to work normally. That is, the present application can automatically control the DC pump to rotate in reverse to remove impurities inside the DC pump after determining that the DC pump meets the preset reversal trigger requirement, without the need for manual operation, which helps to improve processing efficiency and convenience, and thus can promptly solve the problem of water pump jamming.

[0073] Referring to the second embodiment of the control method for preventing a waterproof pump from getting stuck provided by the present application, the method includes:

[0074] Step 210: Determine whether the DC pump receives a preset start instruction.

[0075] Among them, the DC pump is installed on the heating pipe.

[0076] Step 220: If the DC pump receives a preset start instruction, it is determined that the DC pump meets a preset reverse trigger requirement, and the DC pump is controlled to rotate in the reverse direction.

[0077] Step 230: After the DC pump rotates in the reverse direction for a preset period of time, the DC pump is controlled to rotate in the forward direction.

[0078] This embodiment uses a DC pump installed on the heating pipe. Since the DC pump can rotate in two directions by changing the direction of current, when the DC pump receives a preset start-up instruction, that is, each time the DC pump is started, the DC pump is first controlled to rotate in the reverse direction for a preset time period, and then the DC pump is controlled to rotate in the forward direction. In this way, the DC pump can be used to reversely rotate to remove fine debris or oversized bacterial clusters deposited inside the DC pump, and then the DC pump can be controlled to rotate forward to work normally. No manual operation is required, which helps to clean the inside of the DC pump in advance and avoid the DC pump from getting stuck and unable to operate normally, thereby affecting the normal operation of the heating system.

[0079] Referring to the third embodiment of the control method for preventing a waterproof pump from getting stuck provided by the present application, the method includes:

[0080] Step 310: Determine whether the DC pump receives a preset stop operation instruction.

[0081] Among them, the DC pump is installed on the heating pipe.

[0082] Step 320: If the DC pump receives a preset stop operation instruction, it is determined that the DC pump meets a preset reverse trigger requirement, and the DC pump is controlled to rotate in the reverse direction.

[0083] Among them, the preset stop operation instruction can be received by the DC pump during its operation. For example, when there are small debris or oversized bacterial clusters in the heating pipe, a stop operation instruction is sent to the DC pump after the DC pump completes a job, so that the DC pump stops running after receiving the preset stop operation instruction. After the water flow is stagnant, these small debris or oversized bacterial clusters in the heating pipe are deposited on the outer wall of the shaft or the inner wall of the sleeve, and then the DC pump can be controlled to rotate in the opposite direction to remove the small debris or oversized bacterial clusters deposited on the outer wall of the shaft or the inner wall of the sleeve.

[0084] Step 330: After the DC pump rotates in the reverse direction for a preset period of time, the DC pump is controlled to rotate in the forward direction.

[0085] This embodiment uses a DC pump installed on the heating pipe. Since the DC pump can rotate in two directions by changing the direction of current, it is possible to determine whether the DC pump has received a preset stop operation instruction; if the DC pump receives the preset stop operation instruction, it is determined that the DC pump meets the preset reversal trigger requirement. Therefore, the DC pump can be controlled to rotate reversely for a preset time period, and then the DC pump can be controlled to rotate forward. In this way, the DC pump can be used to reversely rotate to remove fine debris or oversized bacterial clusters deposited inside the DC pump, and then the DC pump can be controlled to rotate forward to work normally. No manual operation is required, which helps to improve processing efficiency and convenience, and thus the problem of water pump jamming can be solved in time.

[0086] In some embodiments, the DC pump includes a rotor, a stator and a circuit board, wherein the stator and the circuit board are sealed and potted in the DC pump, and the rotor and the stator are spaced apart. For details, please refer to the fourth embodiment of the control method for preventing a water pump from getting stuck provided in this application, the method includes:

[0087] Step 410: Determine whether the DC pump meets a preset reverse trigger requirement.

[0088] Among them, the DC pump is installed on the heating pipe.

[0089] Step 420: If the DC pump meets the preset reverse triggering requirement, the circuit board is used to change the direction of the magnetic field generated by the coil of the stator through electronic commutation to control the reverse rotation of the rotor.

[0090] Wherein, the rotor comprises an impeller and an annular magnet which are connected to each other; the impeller is located in the heating pipe.

[0091] Step 420 may specifically be the following steps:

[0092] Step 421: Using the circuit board to change the direction of the magnetic field generated by the coil of the stator through electronic commutation, so as to control the reverse rotation of the annular magnet, thereby driving the impeller to rotate in the reverse direction.

[0093] In this way, the direction of the magnetic field generated by the coil of the stator can be changed by electronic commutation using the circuit board without using carbon brushes, which helps to avoid the problems of wear and electromagnetic interference caused by the use of carbon brushes, thereby improving the working stability of the DC pump.

[0094] Step 430: After the DC pump rotates in the reverse direction for a preset period of time, the DC pump is controlled to rotate in the forward direction.

[0095] In this way, each time the DC pump is started or receives a preset stop instruction after completing a work, the circuit board can be used to change the direction of the magnetic field generated by the coil through electronic commutation, control the annular magnet to rotate in the opposite direction, drive the impeller to rotate in the opposite direction for a period of time, and remove small debris or oversized bacterial clusters deposited on the outer wall of the shaft or the inner wall of the sleeve. After that, the annular magnet is controlled to rotate forward, driving the impeller to rotate forward to start normal work. No manual operation is required, which helps to clean the inside of the DC pump in advance and avoid the DC pump from getting stuck and unable to operate normally, thereby affecting the normal operation of the heating system.

[0096] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, i.e., they may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0097] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "a", "an", and "" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain", and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements, and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof.

[0098] The above is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features applied herein.

Claims

1. A control method for preventing a water pump from getting stuck, characterized in that: A DC pump is installed on a heating pipe, and the method comprises: Determining whether the DC pump meets a preset reverse triggering requirement; If the DC pump meets the preset reverse trigger requirement, controlling the DC pump to rotate in the reverse direction; After the DC pump rotates in the reverse direction for a preset period of time, the DC pump is controlled to rotate in the forward direction.

2. The DC pump anti-stuck control method according to claim 1, characterized in that: The determining whether the DC pump meets the preset reversal triggering requirement includes: Determining whether the DC pump has received a preset start instruction; If the DC pump receives a preset start instruction, it is determined that the DC pump meets a preset reverse trigger requirement.

3. The DC pump anti-stuck control method according to claim 1, characterized in that: The step of determining whether the DC pump meets a preset reverse trigger requirement further includes: Determining whether the DC pump has received a preset stop operation instruction; If the DC pump receives a preset stop operation instruction, it is determined that the DC pump meets a preset reverse trigger requirement.

4. The DC pump anti-stuck control method according to any one of claims 1 to 3, characterized in that: The DC pump comprises a rotor, a stator and a circuit board, wherein the stator and the circuit board are sealed and potted in the DC pump, and the rotor and the stator are spaced apart; The controlling the DC pump to rotate in reverse includes: The circuit board is used to change the direction of the magnetic field generated by the coil of the stator through electronic commutation to control the reverse rotation of the rotor.

5. The DC pump anti-stuck control method according to claim 4, characterized in that: The rotor and the stator are both provided with a multi-level magnetic field; When the rotor rotates relative to the stator by a preset angle, the magnetic pole direction of the rotor is automatically changed so that the rotors maintain same-level repulsion.

6. The DC pump anti-stuck control method according to claim 4, characterized in that: The rotor comprises an impeller and an annular magnet connected to each other, and the impeller is located in the heating pipe; The method of using the circuit board to change the direction of the magnetic field generated by the coil of the stator through electronic commutation to control the reverse rotation of the rotor includes: The circuit board is used to change the direction of the magnetic field generated by the coil of the stator through electronic commutation, so as to control the reverse rotation of the annular magnet, thereby driving the impeller to rotate in the reverse direction.

7. A control device for preventing a water pump from getting stuck, characterized in that: The control device comprises a DC pump and a controller, and the controller is used to execute the method according to any one of claims 1 to 6; The DC pump comprises: Pump body; The rotor comprises an annular magnet, an impeller and a sleeve, wherein the annular magnet is connected to the impeller, and the impeller is arranged in the heating pipe and has an opening; Stator; the stator is encapsulated in the pump body, and the stator includes a shell, a rotating shaft, and a coil; the shell is provided with a receiving cavity, the rotating shaft is arranged in the middle of the receiving cavity, one end of the rotating shaft is fixed to the shell, and the other end is partially penetrated in the opening along the height direction of the opening, the shaft sleeve is arranged between the rotating shaft and the end surface of the opening, and a rotation gap is formed between the rotating shaft and the shaft sleeve; The annular magnet is located in the accommodating cavity, and the coil is arranged on the outer circumference of the accommodating cavity and around the rotating shaft; A circuit board is encapsulated in the pump body and electrically connected to the controller.

8. The DC pump anti-stuck control device according to claim 7, characterized in that: The DC pump is also provided with an isolation structure, and the isolation structure is arranged between the annular magnet and the coil.

9. The DC pump anti-stuck control device according to claim 7, characterized in that: The annular magnet and the impeller are an integrated structure.

10. The DC pump anti-stuck control device according to claim 7, characterized in that: The stator and the circuit board are potted in the DC pump using epoxy resin glue.

Images