Draining pump

Abstract

The utility model relates to a drainage pump which comprises a pump body unit, a motor shell assembly, a rotor assembly and a plastic-sealed coil assembly, and the motor shell assembly is connected with the pump body unit; the rotor assembly comprises a magnetic rotor and an impeller, the magnetic rotor is connected with the impeller, the magnetic rotor is arranged in the motor shell assembly and rotationally connected with the motor shell assembly, and the impeller is arranged in the pump body unit; the plastic-sealed coil assembly comprises a plastic-sealed coil body, a PCB and an iron core, the PCB is arranged in the plastic-sealed coil body, the plastic-sealed coil body is arranged on the surface of the motor shell assembly, part of the iron core is arranged in the plastic-sealed coil body, the other part of the iron core is arranged on the surface of the motor shell assembly in a sleeving mode, and a single-chip microcomputer is arranged on the PCB. When the single-chip microcomputer recognizes that the drainage pump is in the water-vapor mixing state, the drainage pump is controlled to be powered According to the utility model, an original starting structure is eliminated, so that the magnetic rotor and the impeller are integrated; when the rotor assembly operates, noise caused by collision between the rotating shaft and the magnetic rotor is avoided, and noise generated when the drainage pump is started is avoided.

Description

Technical Field

[0001] The present application relates to the field of drainage pumps, and in particular to a drainage pump. Background Art

[0002] When a traditional drain pump is started, the coil is energized to drive the magnetic rotor, which is driven to swing back and forth and collide through the starting structure. The inertia is used to make the magnetic rotor reach the starting torque and then drive the impeller to rotate. The swinging of the magnetic rotor back and forth will cause a "clicking" noise. When the washing machine finishes draining, the drain pump will work, but the water cannot be discharged (water vapor mixed state). At this time, the noise of the traditional drain pump will be significantly louder than the noise during normal drainage. Utility Model Content

[0003] The present application provides a drainage pump, which can solve the problem of noise generated by drainage pumps during operation in the related art.

[0004] An embodiment of the present application provides a drainage pump, which includes: a pump body unit, a motor housing assembly, a rotor assembly and a plastic-sealed coil assembly, wherein the motor housing assembly is connected to the pump body unit; the rotor assembly includes a magnetic rotor and an impeller, wherein the magnetic rotor is connected to the impeller, and the magnetic rotor is placed inside the motor housing assembly and is rotatably connected to the motor housing assembly, and the impeller is placed inside the pump body unit; the plastic-sealed coil assembly includes a plastic-sealed coil body, a PCB board and an iron core, wherein the PCB board is arranged inside the plastic-sealed coil body, and the plastic-sealed coil body is arranged on the surface of the motor housing assembly, the iron core part is arranged inside the plastic-sealed coil body, and the other part is sleeved on the surface of the motor housing assembly, and a single-chip microcomputer is arranged on the PCB board. When the single-chip microcomputer recognizes that the drainage pump is in a water-vapor mixed state, it controls the drainage pump to cut off power. The rotor assembly rotates by generating a magnetic flux effect through the plastic-encapsulated coil body, the iron core, and the PCB board. The original starting structure is eliminated, and the magnetic rotor and the impeller are integrated. When the rotor assembly is running, there is no collision sound between the rotating shaft and the magnetic rotor, thus avoiding the noise generated when the drainage pump is started. In addition, the PCB board can identify the drain pump's transition from a full water state to a water vapor mixed state, that is, a semi-water state, through the single-chip microcomputer. When the drain pump enters the semi-water state, the PCB board controls the drain pump to stop working, thus avoiding the noise generated when the drain pump is in the semi-water state.

[0005] In one embodiment, the plastic encapsulated coil assembly further includes: a thermal protector and a lead-out plug-in. The thermal protector is arranged inside the plastic encapsulated coil body and connected to the PCB board; the lead-out plug-in is arranged on the plastic encapsulated coil body.

[0006] In one embodiment, the rotor assembly further includes: a rotating shaft, the magnetic rotor is sleeved and fixed on the surface of the rotating shaft; and the impeller is fixed to the other end of the rotating shaft.

[0007] In one embodiment, the rotor assembly further includes an upper bearing member, which is sleeved on the outer peripheral surface of the rotating shaft and fixed to the inner wall of the motor housing assembly.

[0008] In one embodiment, the motor housing assembly includes: a shell, an outer cover and a lower bearing member, the outer cover is fixed to one side of the shell, one end of the rotor assembly passes through the middle of the outer cover and is placed inside the shell; the lower bearing member is fixed inside the shell and connected to the rotor assembly.

[0009] In one embodiment, a mounting bracket is provided at the bottom end of the shell, the mounting bracket and the shell are integrally formed, a mounting groove is provided on the mounting bracket, and the motor housing assembly is arranged inside the mounting groove.

[0010] In one embodiment, a heat dissipation slot is further provided on the mounting frame.

[0011] In one embodiment, a buckle is provided on the mounting frame, and a buckle is fixedly connected to the surface of the motor housing assembly, and the buckle is used to be engaged with the buckle.

[0012] In one embodiment, the pump unit includes: a pump body, a sewage pipe assembly and a filter assembly, one end of the sewage pipe assembly is connected to the pump body; the filter assembly is arranged inside the pump body.

[0013] The beneficial effects of the technical solutions provided in the embodiments of the present application include:

[0014] An embodiment of the present application provides a drainage pump, which rotates the rotor assembly by generating a magnetic flux effect through a plastic-encapsulated coil body in conjunction with an iron core and a PCB board, thereby eliminating the original starting structure so that the magnetic rotor and the impeller are integrated. When the rotor assembly is running, there is no sound of collision between the rotating shaft and the magnetic rotor, thereby avoiding the noise generated when the drainage pump is started. In addition, the PCB board can identify through a single-chip microcomputer that the drainage pump enters a water-vapor mixed state, that is, a semi-water state, from a full water state. When the drainage pump enters the semi-water state, the PCB board controls the drainage pump to stop working, thereby avoiding the noise generated when the drainage pump is in the semi-water state. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 any creative work.

[0016] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present application;

[0017] Figure 2A schematic diagram of the overall structure provided for an embodiment of the present application;

[0018] Figure 3 An exploded view of the overall structure provided in an embodiment of the present application;

[0019] Figure 4 Schematic diagram of the pump unit, motor housing assembly and plastic-sealed coil assembly provided in an embodiment of the present application;

[0020] Figure 5 Schematic diagram of the motor housing assembly and plastic-encapsulated coil assembly provided in an embodiment of the present application.

[0021] In the figure: 1. Pump unit; 10. Pump body; 11. Sewage pipe assembly; 12. Filter assembly;

[0022] 2. Rotor assembly; 20. Magnetic rotor; 21. Rotating shaft; 22. Upper bearing; 23. Impeller;

[0023] 3. Motor housing assembly; 30. Housing; 300. Retaining ring; 31. Outer cover; 32. Lower bearing; 33. Heat sink;

[0024] 4. Plastic-sealed coil assembly; 40. Plastic-sealed coil body; 400. Buckle; 41. Thermal protector; 42. PCB board; 43. PCB shell; 44. Iron core; 45. Lead-out plug. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] See also Figures 1 to 5 , an embodiment of the present application provides a drainage pump, which can solve the problem of noise generated by the operation of the drainage pump in the related art.

[0027] When a traditional drain pump is started, the coil is energized to drive the magnetic rotor, which is driven to swing back and forth and collide through the starting structure. The inertia is used to make the magnetic rotor reach the starting torque and then drive the impeller 23 to rotate. The swinging of the magnetic rotor back and forth will cause a "clicking" noise. When the washing machine finishes draining, the drain pump will work, but the water cannot be drained (water vapor mixed state). At this time, the noise of the traditional drain pump will be significantly louder than the noise during normal drainage.

[0028] Aiming at the problem of noise generated by the operation of a drainage pump. An embodiment of the present application provides a drainage pump, which includes: a pump body unit 1, a motor housing assembly 3, a rotor assembly 2 and a plastic-sealed coil assembly 4, wherein the motor housing assembly 3 is connected to the pump body unit 1; the rotor assembly 2 includes a magnetic rotor 20 and an impeller 23, wherein the magnetic rotor 20 is connected to the impeller 23, and the magnetic rotor 20 is placed inside the motor housing assembly 3 and is rotatably connected to the motor housing assembly 3, and the impeller 23 is placed inside the pump body unit 1; the plastic-sealed coil assembly 4 includes a plastic-sealed coil body 40, a PCB board 42 and an iron core 44, wherein the PCB board 42 is arranged inside the plastic-sealed coil body 40, the plastic-sealed coil body 40 is arranged on the surface of the motor housing assembly 3, the iron core 44 is partially arranged inside the plastic-sealed coil body 40, and the other part is sleeved on the surface of the motor housing assembly 3, a single-chip microcomputer is arranged on the PCB board 42, and when the single-chip microcomputer recognizes that the drainage pump is in a water-vapor mixed state, it controls the drainage pump to cut off power.

[0029] In the present application, the magnetic flux effect is generated by the encapsulated coil body 40 in conjunction with the iron core 44 and the PCB board 42 to rotate the rotor assembly 2, and the original starting structure is eliminated so that the magnetic rotor 20 and the impeller 23 are integrated. When the rotor assembly 2 is running, there is no collision sound between the rotating shaft and the magnetic rotor 20, thereby avoiding the noise generated when the drainage pump is started. In addition, the PCB board 42 can identify through the single-chip microcomputer that the drainage pump enters the water vapor mixed state from the full water state, that is, the semi-water state. When the drainage pump enters the semi-water state, the PCB board 42 controls the drainage pump to stop working, thereby avoiding the noise generated when the drainage pump is in the semi-water state.

[0030] The plastic-encapsulated coil body 40 is provided with a through slot for the iron core 44 to pass through. The through slot runs through the upper and lower sides of the plastic-encapsulated coil body 40. The iron core 44 is partially placed in the through slot and is fixedly connected to the plastic-encapsulated coil body 40. Furthermore, one end of the iron core 44 passes through the interior of the plastic-encapsulated coil body 40 and contacts the motor housing assembly 3, and is sleeved on the surface of the motor housing assembly 3. In this embodiment, in order to make the iron core 44 better fit the motor housing assembly 3, a groove is provided on the inner wall of the iron core 44, such as Figure 2 As shown, the iron core 44 is sleeved on the outer periphery of the motor housing assembly 3 , and the groove on the iron core 44 fits in with the outer wall of the motor housing assembly 3 .

[0031] In this embodiment, the iron core 44 acts as a stator and generates suction on the rotor assembly 2. To escape the suction of the iron core 44, the rotor assembly 2 must rotate to a certain angle. When the drain pump is operating, the alternating current from the plastic-encapsulated coil body 40 causes the rotor assembly 2 to rotate. However, the angle of rotation is insufficient to free the rotor assembly 2 from the suction of the iron core 44. Therefore, the PCB 42 is used to control the power of the plastic-encapsulated coil body 40, thereby increasing the rotation angle of the rotor assembly 2. This allows the rotor assembly 2 to rotate. Consequently, the rotor assembly 2 does not need to swing back and forth during operation, preventing noise from the drain pump.

[0032] Based on the above embodiment, in this embodiment, the plastic encapsulation coil assembly 4 further includes: a thermal protector 41 and a lead-out plug 45. The thermal protector 41 is arranged inside the plastic encapsulation coil body 40 and is connected to the PCB board 42; the lead-out plug 45 is arranged on the plastic encapsulation coil body 40.

[0033] Specifically, the thermal protector 41 is welded on the PCB board 42. The thermal protector 41 protects the PCB board 42 and also protects the entire product drainage pump. When the PCB board 42 and the drainage pump are overheated, the power will be automatically cut off for protection.

[0034] It should be noted that a lead-out plug 45 is provided outside the plastic-encapsulated coil body 40 . The lead-out plug 45 is a plug for energizing the plastic-encapsulated coil body 40 .

[0035] When assembling the plastic-sealed coil assembly 4, the thermal protector 41 is welded to the PCB board 42. A groove is also provided in the plastic-sealed coil body 40. After the thermal protector 41 is connected to the PCB board 42, the PCB board 42 is welded to the groove of the plastic-sealed coil body 40, and the gap between the PCB board 42 and the groove wall of the plastic-sealed coil body 40 is filled with insulating glue, and the thermal protector 41 and the PCB board 42 are encapsulated with a PCB shell 43, and the PCB board 42 is protected by the PCB shell 43; finally, the iron core 44 is inserted into the through groove of the plastic-sealed coil body to form the plastic-sealed coil assembly 4.

[0036] On the basis of the above embodiment, in this embodiment, the rotor assembly 2 further includes: a rotating shaft 21 , the magnetic rotor 20 is sleeved and fixed on the surface of the rotating shaft 21 ; and the impeller 23 is fixed to the other end of the rotating shaft 21 .

[0037] Specifically, the magnetic rotor 20 is sleeved on the outer peripheral surface of the rotating shaft 21 and is sealed with plastic together with the rotating shaft 21; the other end of the rotating shaft 21 is welded to the impeller 23 as a whole, so the rotating shaft 21, the magnetic rotor 20 and the impeller 23 are an integrated structure, which rotates and stops simultaneously under the drive of the plastic-sealed coil assembly 4.

[0038] Furthermore, the rotor assembly 2 further includes an upper bearing member 22 , which is sleeved on the outer peripheral surface of the rotating shaft 21 and fixed to the inner wall of the motor housing assembly 3 .

[0039] When assembling the rotor assembly 2 , the magnetic rotor 20 and the shaft 21 are first sealed together with plastic, and then the bearing 22 is installed on the shaft 21 . The impeller 23 is then welded together with the shaft 21 to form the rotor assembly 2 .

[0040] On the basis of the above embodiment, in this embodiment, the motor housing assembly 3 includes: a shell 30, an outer cover 31 and a lower bearing member 32, the outer cover 31 is fixed to one side of the shell 30, and one end of the rotor assembly 2 passes through the middle of the outer cover 31 and is placed inside the shell 30; the lower bearing member 32 is fixed inside the shell 30 and is connected to the rotor assembly 2.

[0041] Specifically, in this embodiment, the housing 30 is made of plastic. After the plastic-encapsulated coil assembly 4 is installed on the motor housing assembly 3, the iron core 44 is sleeved on the outer peripheral surface of the housing 30;

[0042] The housing 30 has an opening at one end, connected to a housing 31. The housing 31 is connected to the housing 30 at one end and to the pump unit 1 at the other. To facilitate the insertion of the rotor assembly 2, a through-hole is provided in the center of the housing 31. After the magnetic rotor 20 is inserted through the through-hole and connected to the motor housing assembly 3, one end of the shaft 21 is located inside the housing 30, while the impeller 23 is located outside the housing 30.

[0043] In order to improve the smooth rotation of the rotor assembly 2, a lower bearing member 32 is installed inside the housing 30. One end of the rotating shaft 21 is located inside the housing 30 and is connected to the lower bearing member 32. After the magnetic rotor 20 is penetrated by the through hole, the upper bearing member 22 on the magnetic rotor 20 is connected to the through hole wall in the middle of the outer cover 31. Therefore, when the rotor assembly 2 rotates relative to the housing 30, the lower bearing member 32 cooperates with the upper bearing member 22, which can make the rotor assembly 2 rotate more smoothly.

[0044] When assembling the motor housing assembly 3 , first install the lower bearing 32 inside the housing 30 , and then install the outer cover 31 and the rotor assembly 2 .

[0045] On the basis of the above embodiment, in this embodiment, a mounting bracket is provided at the bottom of the housing 30 , the mounting bracket and the housing 30 are integrally formed, a mounting groove is provided on the mounting bracket, and the motor housing assembly 3 is arranged inside the mounting groove.

[0046] In this embodiment, to improve the stability of the connection between the plastic-encapsulated coil assembly 4 and the motor housing assembly 3, a mounting bracket for placing the plastic-encapsulated coil assembly 4 is fixed to the bottom end of the housing 30. The mounting bracket includes a back plate, a bottom plate, and two side plates. The two side plates are respectively fixed to the sides of the back plate, and the bottom plate is fixed to the bottom end of the back plate.

[0047] After the plastic-encapsulated coil assembly 4 is connected to the motor housing assembly 3, the multiple walls of the plastic-encapsulated coil body 40 are respectively bonded to the back plate, bottom plate, and two side plates. Furthermore, to improve the heat dissipation of the plastic-encapsulated coil assembly 4, heat dissipation slots 33 are provided on the mounting frame. Specifically, multiple heat dissipation slots 33 are spaced apart on the back plate, allowing the back plate to both support the plastic-encapsulated coil body 40 and facilitate heat dissipation of the plastic-encapsulated coil assembly 4 through the heat dissipation slots 33.

[0048] Furthermore, in order to improve the stability of the connection between the plastic encapsulated coil assembly 4 and the motor housing assembly 3, a buckle 300 is provided on the mounting frame, and a snap 400 is fixedly connected to the surface of the motor housing assembly 3. The snap 400 is used to snap into engagement with the buckle 300. Specifically, a buckle 300 is provided on the side panel, and a snap 400 is fixedly connected to the side wall of the plastic encapsulated coil body 40. When the plastic encapsulated coil assembly 4 is connected to the motor housing assembly 3, the snap 400 snaps into the buckle 300, and the snap 400 cooperates with the buckle 300 to secure the plastic encapsulated coil assembly 4 to the motor housing assembly 3.

[0049] Based on the above embodiment, in this embodiment, the pump body unit 1 includes: a pump body 10, a sewage pipe assembly 11 and a filter assembly 12, one end of the sewage pipe assembly 11 is connected to the pump body 10; the filter assembly 12 is arranged inside the pump body 10.

[0050] Specifically, in this embodiment, the outer cover 31 of the motor housing assembly 3 is connected to the pump body 10, and the motor housing assembly 3 is fixed to the pump body 1 by screws. The plastic-encapsulated coil assembly 4 is then installed on the motor housing assembly 3. After the drainage pump is assembled, the impeller 23 of the rotor assembly 2 is located inside the pump body 10. The filter assembly 12 can filter the water flow, and the sewage pipe assembly 11 can discharge the sewage.

[0051] The drain pump is applicable to most washing machines on the market. When in use, the drain pump is installed on the washing machine fixing plate, and the water inlet pipe and the sewage pipe assembly 11 are connected. When the washing machine is working normally and needs to drain water, the drain pump is started.

[0052] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and 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, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0053] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0054] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily 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 application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A drainage pump, characterized in that include: Pump unit (1); A motor housing assembly (3), wherein the motor housing assembly (3) is connected to the pump body unit (1); A rotor assembly (2), the rotor assembly (2) comprising a magnetic rotor (20) and an impeller (23), the magnetic rotor (20) being connected to the impeller (23), the magnetic rotor (20) being disposed inside the motor housing assembly (3) and being rotationally connected thereto, and the impeller (23) being disposed inside the pump body unit (1); A plastic encapsulated coil assembly (4), the plastic encapsulated coil assembly (4) comprising a plastic encapsulated coil body (40), a PCB board (42) and an iron core (44), the PCB board (42) being arranged inside the plastic encapsulated coil body (40), the plastic encapsulated coil body (40) being arranged on the surface of a motor housing assembly (3), the iron core (44) being partially arranged inside the plastic encapsulated coil body (40), and the other part being sheathed on the surface of the motor housing assembly (3), a single chip microcomputer being arranged on the PCB board (42), and controlling the drain pump to cut off power when the single chip microcomputer recognizes that the drain pump is in a water vapor mixed state.

2. The drainage pump according to claim 1, wherein The plastic-sealed coil assembly (4) further comprises: A thermal protector (41), the thermal protector (41) is arranged inside the plastic-sealed coil body (40) and connected to the PCB board (42); A lead-out plug-in (45) is provided on the plastic-encapsulated coil body (40).

3. The drainage pump according to claim 1, wherein The rotor assembly (2) further comprises: The rotating shaft (21); the magnetic rotor (20) is sleeved and fixed on the surface of the rotating shaft (21); and the impeller (23) is fixed on the other end of the rotating shaft (21).

4. The drainage pump according to claim 3, wherein: The rotor assembly (2) further comprises an upper bearing component (22), wherein the upper bearing component (22) is sleeved on the outer peripheral surface of the rotating shaft (21) and fixed to the inner wall of the motor housing assembly (3).

5. The drainage pump according to claim 1, wherein The motor housing assembly (3) comprises: Housing (30); An outer cover (31), the outer cover (31) is fixed to one side of the housing (30), one end of the rotor assembly (2) passes through the middle of the outer cover (31) and is placed inside the housing (30); A lower bearing component (32) is fixed inside the housing (30) and connected to the rotor assembly (2).

6. The drainage pump according to claim 5, characterized in that: A mounting frame is provided at the bottom end of the housing (30), the mounting frame and the housing (30) are integrally formed, a mounting slot is provided on the mounting frame, and the motor housing assembly (3) is arranged inside the mounting slot.

7. The drainage pump according to claim 6, wherein: The mounting frame is also provided with a heat dissipation slot (33).

8. The drainage pump according to claim 6, wherein: A buckle (300) is provided on the mounting frame, and a buckle (400) is fixedly connected to the surface of the motor housing assembly (3), and the buckle (400) is used for buckling with the buckle (300).

9. The drainage pump according to claim 1, wherein The pump unit (1) comprises: Pump body (10); A sewage pipe assembly (11), one end of which is connected to the pump body (10); A filter assembly (12) is provided inside the pump body (10).

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